Two-way turnover structure with locking function and handrail

Abstract

The utility model discloses a bi-directional turnover structure with a locking function and a handrail, and the bi-directional turnover structure with the locking function comprises a base; the fixed fluted disc is fixedly connected to the base; the rotating fluted disc is rotationally connected to the base and meshed with the end face of the fixed fluted disc; the switch assembly comprises a compression spring and a rotating handle, the compression spring and the rotating handle are connected with the two ends of the rotating fluted disc respectively, and a locking plane is arranged on the side, facing the rotating fluted disc, of the rotating handle so as to drive the rotating fluted disc to be meshed and fixed with the fixed fluted disc; the locking plane is provided with a containing groove, and when the rotating handle rotates in the opposite direction, the rotating fluted disc and the fixed fluted disc are driven to rotate in a meshed mode or be fixed in a meshed mode through the locking plane and the containing groove. High strength is ensured through a two-way locking mechanism and multi-tooth-position meshing, meanwhile, miniaturization and light weight of the structure are achieved, portability and space adaptability are improved, the overall design gives consideration to strength, size, operation convenience and durability, and user experience is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical rotation adjustment locking mechanisms, in particular to a locking two-way flip structure and an armrest with the locking two-way flip structure. Background Art

[0002] In modern industrial design, handrails are a common auxiliary tool widely used in public facilities, home environments, medical equipment and various types of transportation to improve safety, convenience and user experience. Traditional handrail structures usually include an adjustable support arm to adapt to different usage scenarios and user needs. However, these traditional designs have exposed some significant shortcomings in practical applications, especially in terms of strength, stability and ease of operation.

[0003] The limitations of traditional handrail structures are as follows:

[0004] 1. One-way locking mechanism: Most existing handrails adopt a one-way locking design, which means they can only be locked in one direction. This design may not meet the user's needs for quick reverse adjustment of the handrail in some cases, especially in emergency situations, when the user may need to quickly change the angle of the handrail to deal with emergencies.

[0005] 2. Strength and stability issues: Traditional handrails are often designed with emphasis on structural simplicity and cost control, at the expense of strength and stability. This means that when subjected to large external forces, such as the user's weight or a sudden impact, the handrail is prone to displacement or deformation, which in turn affects its locking effect and even creates a safety hazard.

[0006] 3. Volume and weight: In order to achieve sufficient strength and stability, many traditional handrail designs tend to use thicker and heavier materials, which not only increases the overall weight of the product, but also limits its application in space-constrained environments, such as narrow aisles or inside small vehicles.

[0007] 4. Operational complexity: The locking and unlocking process of some armrests is cumbersome, requiring users to perform a series of complex operations to complete the angle adjustment, which reduces the user experience, especially in emergency situations that require quick response.

[0008] Therefore, the market is in urgent need of a new type of handrail structure that can overcome the limitations of the above-mentioned traditional designs and provide a more stable, flexible, lightweight and easy-to-operate solution to meet the increasingly diverse and high-standard user needs. Utility Model Content

[0009] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a locking two-way flip structure, which ensures high strength through a two-way locking mechanism and multi-tooth engagement, while achieving miniaturization and lightness of the structure, improving portability and space adaptability, and the overall design takes into account strength, volume, ease of operation and durability, greatly improving user experience.

[0010] The utility model also provides an armrest with the above-mentioned locking two-way flip structure.

[0011] According to the utility model, a locking bidirectional flip structure comprises:

[0012] Pedestal;

[0013] A fixed toothed disc, fixedly connected to the base;

[0014] A rotating toothed disc is rotatably connected to the base, and an end surface of the rotating toothed disc is meshed with an end surface of the fixed toothed disc;

[0015] A switch assembly, comprising a compression spring and a rotating handle, wherein the compression spring and the rotating handle are respectively connected to two ends of the rotating gear disc, and a locking plane is provided on a side of the rotating handle facing the rotating gear disc to drive the rotating gear disc to engage and fix with the fixed gear disc;

[0016] The locking plane is provided with a receiving groove, the rotating handle is suitable for rotating in a first direction, and the compression spring is used to drive the rotating gear disc to engage with the receiving groove and rotate in mesh with the fixed gear disc;

[0017] The rotating handle is suitable for rotating away from the first direction, and the rotating handle is drivingly connected with the rotating gear disc to drive the rotating gear disc to move toward one side of the fixed gear disc and re-engage and fix with the fixed gear disc.

[0018] The locking two-way flip structure according to the utility model has at least the following beneficial effects: precise meshing of the fixed toothed disc and the rotating toothed disc, small structural volume, more stressed tooth positions, strong bearing force, and the entire structural volume can be greatly reduced under the same strength requirement. In addition, combined with the ingenious design of the switch assembly, the angle adjustment in two directions of the meshing and rotating of the rotating toothed disc and the fixed toothed disc when unlocked is realized, and the rotating toothed disc and the fixed toothed disc are re-engaged, fixed and firmly locked after adjustment; allowing the user to freely adjust the angle in two directions, while ensuring the stability of the lock at any angle position, and the angle will not be changed due to external force during use, so that the user can be more assured to apply force on the armrest surface, which increases the convenience and flexibility of use, while ensuring the compactness and lightweight of the structure, and improving the market competitiveness of the product.

[0019] According to a locking bidirectional flip structure described in some embodiments of the utility model, the base is also rotatably connected to a connecting block and a transmission block, the connecting block is provided with a mounting groove, the mounting groove extends in a direction parallel to the center line of the fixed gear disc and penetrates the connecting block, the transmission block and the rotating gear disc are sequentially installed in the mounting groove and slidably cooperate with the mounting groove, and the rotating handle is sequentially connected to the transmission block and the rotating gear disc for transmission.

[0020] According to a locking bidirectional flip structure described in some embodiments of the utility model, an opening is provided on the groove wall of the installation groove on the side facing the rotating handle, and a connection is established between the transmission block and the rotating handle through the opening.

[0021] According to a locking bidirectional flip structure described in some embodiments of the utility model, there is a planar abutment transmission between the rotating gear disk and the transmission block.

[0022] According to a locking bidirectional flip structure described in some embodiments of the utility model, there is an inclined abutment transmission between the transmission block and the rotating handle.

[0023] According to a locked bidirectional flip structure described in some embodiments of the utility model, a transmission protrusion is provided on the side of the transmission block facing away from the rotating gear disc, a first inclined surface is provided on the end of the transmission protrusion, and a second inclined surface is provided on the end of the accommodating groove facing the first direction, and the second inclined surface is abutted against the first inclined surface for transmission to drive the transmission block to move toward one side of the rotating gear disc and drive the rotating gear disc to engage and be fixed with the fixed gear disc.

[0024] According to some embodiments of the utility model, a locked bidirectional flip structure also includes a reset torsion spring, wherein the two ends of the reset torsion spring are respectively connected to the rotating handle and the base, and the action force of the reset torsion spring is greater than the action force of the compression spring, so as to drive the rotating handle to rotate away from the first direction and re-engage and fix the rotating gear disc and the fixed gear disc.

[0025] According to a locking bidirectional flip structure described in some embodiments of the utility model, the rotating gear disk is fixedly connected to a connecting disk, the connecting disk is provided with a limiting groove, the rotating handle is provided with a limiting protrusion, and the limiting protrusion is slidably set in the limiting groove.

[0026] According to a locking bidirectional flip structure described in some embodiments of the utility model, an annular installation cavity is arranged between the fixed gear disc and the rotating gear disc, there are multiple compression springs, and the multiple compression springs are evenly distributed circumferentially in the installation cavity, one end of the compression spring is pressed and connected to the fixed gear disc, and the other end is pressed and connected to the rotating gear disc.

[0027] The armrest according to the utility model comprises a locking two-way flip structure according to the utility model.

[0028] The armrest according to the utility model has at least the following beneficial effects: applying the above-mentioned innovative locking two-way flip structure to the armrest significantly improves the functionality and user experience of the armrest, so that the armrest not only has excellent stability and reliability, but also has a smaller size and weight, a wider range of applications, and a more intuitive operation method, making it an ideal choice for various occasions requiring auxiliary support.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 This is a cross-sectional schematic diagram of a locking bidirectional flip structure according to an embodiment of the utility model;

[0032] Figure 2 This is a first exploded schematic diagram of a locking bidirectional flip structure according to an embodiment of the utility model;

[0033] Figure 3 This is a second exploded schematic diagram of a locking bidirectional flip structure according to an embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the overall structure of a locking bidirectional flip structure according to an embodiment of the utility model;

[0035] Figure 5 This is an overall exploded schematic diagram of a locking bidirectional flip structure according to an embodiment of the utility model;

[0036] Figure 6 It is a structural schematic diagram of a base with a locking two-way flip structure according to an embodiment of the utility model.

[0037] Description of Figure Numbers:

[0038] Base 100; accommodating cavity 101; first mounting surface 1011; first guiding conical surface 10111; second mounting surface 1012; second guiding conical surface 10121; axial screw 110; first rotating sleeve 120; second rotating sleeve 130; second matching conical surface 1301;

[0039] Fixed toothed disc 200; mounting cavity 201; first matching cone surface 202; compression spring 210;

[0040] Rotating gear disc 300; transmission block 310; transmission protrusion 311; first inclined surface 3111;

[0041] Rotating handle 400; locking plane 401; accommodating groove 402; second inclined surface 4021; limiting protrusion 410;

[0042] Connecting block 500; mounting groove 501; opening 5011; fixing groove 502;

[0043] Connecting plate 600; limiting groove 601;

[0044] Return torsion spring 700. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0048] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0049] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] In modern industrial design, handrails are a common auxiliary tool widely used in public facilities, home environments, medical equipment and various types of transportation to improve safety, convenience and user experience. Traditional handrail structures usually include an adjustable support arm to adapt to different usage scenarios and user needs. However, these traditional designs have exposed some significant shortcomings in practical applications, especially in terms of strength, stability and ease of operation.

[0051] The limitations of traditional handrail structures are as follows:

[0052] 1. One-way locking mechanism: Most existing handrails adopt a one-way locking design, which means they can only be locked in one direction. This design may not meet the user's needs for quick reverse adjustment of the handrail in some cases, especially in emergency situations, when the user may need to quickly change the angle of the handrail to deal with emergencies.

[0053] 2. Strength and stability issues: Traditional handrails are often designed with emphasis on structural simplicity and cost control, at the expense of strength and stability. This means that when subjected to large external forces, such as the user's weight or a sudden impact, the handrail is prone to displacement or deformation, which in turn affects its locking effect and even creates a safety hazard.

[0054] 3. Volume and weight: In order to achieve sufficient strength and stability, many traditional handrail designs tend to use thicker and heavier materials, which not only increases the overall weight of the product, but also limits its application in space-constrained environments, such as narrow aisles or inside small vehicles.

[0055] 4. Operational complexity: The locking and unlocking process of some armrests is cumbersome, requiring users to perform a series of complex operations to complete the angle adjustment, which reduces the user experience, especially in emergency situations that require quick response.

[0056] Therefore, the market is in urgent need of a new type of handrail structure that can overcome the limitations of the above-mentioned traditional designs and provide a more stable, flexible, lightweight and easy-to-operate solution to meet the increasingly diverse and high-standard user needs.

[0057] For this reason, Figures 1 to 4As shown, a locking bidirectional flip structure proposed by the utility model includes a base 100, a fixed toothed disc 200 fixedly connected to the base 100, a rotating toothed disc 300 rotatably connected to the base 100, and a switch assembly for operating the rotating toothed disc 300, wherein the end face of the rotating toothed disc 300 and the end face of the fixed toothed disc 200 are respectively provided with circumferentially uniformly distributed teeth, so that the end face of the rotating toothed disc 300 is meshed with the end face of the fixed toothed disc 200, and the switch assembly is used to switch the meshing state of the rotating toothed disc 300 and the fixed toothed disc 200. For example, the switch assembly can drive the rotating toothed disc 300 and the fixed toothed disc 200 to be in a locked state of meshing and fixing, at which time, the rotating toothed disc 300 cannot rotate. For another example, the switch assembly can drive the rotating toothed disc 300 and the fixed toothed disc 200 to be in an unlocked state of meshing and rotating, at which time, the rotating toothed disc 300 can float relative to the axial direction of the fixed toothed disc 200, and the rotating toothed disc 300 can rotate. Specifically, the switch assembly includes a compression spring 210 and a rotating handle 400, the compression spring 210 and the rotating handle 400 are respectively connected to the two ends of the rotating toothed disc 300, and a locking plane 401 is provided on the side of the rotating handle 400 facing the rotating toothed disc 300 to drive the rotating toothed disc 300 to engage and fix with the fixed toothed disc 200. Further, the locking plane 401 is provided with a receiving groove 402. In application, the rotating handle 400 is suitable for rotating in a first direction, and the compression spring 210 is used to drive the rotating toothed disc 300 to be plugged and matched with the receiving groove 402. At this time, the rotating toothed disc 300 is in an unlocked state and can engage and rotate with the fixed toothed disc 200. In addition, after the rotating toothed disc 300 is rotated and adjusted, the rotating handle 400 is suitable for rotating away from the first direction, and the rotating handle 400 is in transmission connection with the rotating toothed disc 300 to drive the rotating toothed disc 300 to move toward one side of the fixed toothed disc 200 and re-engage and fix with the fixed toothed disc 200. It should be noted that the precise meshing of the fixed gear disc 200 and the rotating gear disc 300 results in a small structural volume, a large number of stressed teeth, and a strong bearing force. Under the same strength requirement, the volume of the entire structure can be greatly reduced. In addition, combined with the ingenious design of the switch assembly, the rotating gear disc 300 and the fixed gear disc 200 can be meshed and rotated to adjust the angle in two directions when they are unlocked, and the rotating gear disc 300 and the fixed gear disc 200 can be re-engaged, fixed and firmly locked after adjustment; allowing the user to freely adjust the angle in two directions, while ensuring the stability of the lock at any angle position, and the angle will not be changed due to external force during use, so that the user can be more assured to apply force to the armrest surface, which increases the convenience and flexibility of use, while ensuring the compactness and lightweight of the structure, and improving the market competitiveness of the product.

[0058] In some embodiments, the operations of rotating the handle toward a first direction and rotating away from the first direction are both manual. For example, the user operates the handle to rotate to respectively unlock and lock the rotating gear disk. In some applications, the first direction is an upward direction. During operation, the user rotates the handle upward, or rotates the handle downward. In some embodiments of the present invention, the user manually operates the rotating handle 400 to unlock. After rotation and adjustment, the rotating handle 400 can automatically drive the rotating gear disk 300 to enter a locked state, thereby improving the user's operating experience and making it more convenient to use. Specifically, referring to Figures 1 to 3 The rotating handle 400 is connected to a reset torsion spring 700, and the two ends of the reset torsion spring 700 are respectively connected to the rotating handle 400 and the base 100, wherein the force of the reset torsion spring 700 is greater than the force of the compression spring 210, so as to drive the rotating handle 400 to rotate away from the first direction and re-engage the fixed rotating gear disc 300 and the fixed gear disc 200. The setting of the reset torsion spring 700 enables the rotating handle 400 to automatically return to the initial position after the operation is completed, without the need for additional operation by the user, thereby simplifying the use process and improving convenience. In addition, the force of the reset torsion spring 700 is greater than the compression spring 210, which ensures the reliability of the locked state and maintains stability even in complex environments. Optionally, an annular installation cavity 201 is provided between the fixed toothed disc 200 and the rotating toothed disc 300, and there are multiple compression springs 210, which are evenly distributed in the circumference of the installation cavity 201, and one end of the compression spring 210 is pressed and connected with the fixed toothed disc 200, and the other end is pressed and connected with the rotating toothed disc 300. For example, the groove wall of the fixed toothed disc 200 facing the fixed toothed disc 200 is provided with an annular groove, and the compression spring 210 is partially placed in the groove. It should be noted that the uniform distribution of multiple compression springs 210 ensures the pressure balance between the fixed toothed disc 200 and the rotating toothed disc 300, and improves the stability and consistency of the rotating toothed disc 300 during the unlocking action. In addition, the design of the annular installation cavity 201 makes full use of the space, making the structure more compact. At the same time, the uniform distribution of the compression springs 210 also helps to disperse the stress and extend the service life of the overall structure.

[0059] Some specific installation methods, such as Figure 1 , Figure 5 and Figure 6As shown, the cavity wall of the accommodating cavity 101 is provided with a first mounting surface 1011 and a second mounting surface 1012 arranged opposite to each other, and the base 100 is provided with an axial screw 110, which is arranged in the middle of the fixed toothed disc 200 and the rotating toothed disc 300. The axial screw 110 is threadedly connected with the base 100, and drives the first mounting surface 1011 and the second mounting surface 1012 to move toward each other to tighten the fixed toothed disc 200 and the rotating toothed disc 300. It is easy to understand that the fixed toothed disc 200 and the rotating toothed disc 300 are both hollow structures, and the middle part of the axial screw 110 is a smooth cylinder, which can axially position the fixed toothed disc 200 and the rotating toothed disc 300. In addition, by threading the axial screw 110 with the base 100, the tightening force can be adjusted, ensuring the close fit between the fixed toothed disc 200 and the rotating toothed disc 300, thereby improving the stability and reliability during locking. In addition, the threaded connection between the axial screw 110 and the base 100 allows the user to make fine adjustments according to actual needs to adapt to the needs under different use conditions, thereby increasing the adaptability and flexibility of the structure. Further, a first guide cone 10111 is provided at the bottom end of the first mounting surface 1011, and a second guide cone 10121 is provided at the bottom end of the second mounting surface 1012, and the first guide cone 10111 and the second guide cone 10121 are arranged opposite to each other. In addition, the accommodating cavity 101 is provided with a first rotating sleeve 120 and a second rotating sleeve 130, the rotating gear disc 300 is rotatably mounted on the first rotating sleeve 120, and the rotating handle 400 is rotatably mounted on the second rotating sleeve 130; the fixed gear disc 200 is provided with a first matching cone 202 that matches the first guide cone 10111, and the second rotating sleeve 130 is provided with a second matching cone 1301 that matches the second guide cone 10121. The middle part of the axial screw 110 is sequentially passed through the fixed toothed disc 200, the first rotating sleeve 120 and the second rotating sleeve 130, and tightens and fixes the fixed toothed disc 200, the first rotating sleeve 120 and the second rotating sleeve 130. By setting the first guide cone 10111 and the second guide cone 10121 at the bottom ends of the first mounting surface 1011 and the second mounting surface 1012, and cooperating with the use of the fixed toothed disc 200 and the second rotating sleeve 130, the whole structure can achieve smoother and more accurate positioning during the tightening process. The design of the guide cone helps to guide the alignment of the fixed toothed disc 200 and the rotating toothed disc 300 during tightening, improves the convenience of assembly, avoids jamming or wear caused by position deviation, and prolongs the service life of the structure. At the same time, the coordinated use of the first matching cone 202 and the second matching cone 1301 ensures the synchronization between the components during the rotation process, reduces the vibration and noise during the movement, and improves the stability and quietness of the overall structure.The middle part of the axial screw 110 passes through the fixed gear disc 200, the first rotating sleeve 120 and the second rotating sleeve 130 in sequence and is tightened, which not only simplifies the assembly process, but also ensures the tight connection of all related components, further improving the overall stability and strength of the structure.

[0060] In some embodiments, the end of the rotating gear disc facing away from the fixed gear disc is directly connected to the rotating handle. However, when the rotating gear disc and the fixed gear disc are in the locked state, the rotating handle needs to drive the rotating gear disc to press the fixed gear disc, and when the rotating gear disc and the fixed gear disc are in the unlocked state, the rotating handle needs to rotate relative to the fixed gear disc together with the rotating gear disc. In this regard, when switching from the unlocked state to the locked state, the rotating handle needs to be rotated to drive the rotating gear disc to move linearly toward one side of the fixed gear disc to engage with the fixed gear disc, and the rotating gear disc needs to be fine-tuned and rotated by a certain angle during the engagement with the fixed gear disc to ensure the alignment and engagement with the fixed gear disc. However, the two ends of the rotating gear disc are directly connected to the fixed gear disc and the rotating handle respectively, and the problem of jamming may occur during application. In some embodiments of the present invention, the rotating gear disc 300 and the rotating handle 400 are connected by a transmission block 310 to avoid the conflict that the rotating gear disc 300 needs to take into account in both rotation and linear motion, thereby reducing the failure rate during use. Reference Figures 1 to 3 The first rotating sleeve 120 is rotatably mounted with a connecting block 500, the connecting block 500 is provided with a fixing groove 502, the rotating toothed disc 300 and the transmission block 310 are mounted in the fixing groove 502 and rotate together with the connecting block 500, and the fixing groove 502 is provided with a mounting groove 501 on the groove wall facing the rotating handle 400, the mounting groove 501 extends in a direction parallel to the center line of the fixed toothed disc 200 and is arranged through the connecting block 500, the transmission block 310 and the rotating toothed disc 300 are sequentially mounted in the mounting groove 501 and slide in the mounting groove 501, and the rotating handle 400 is sequentially connected with the transmission block 310 and the rotating toothed disc 300. It is easy to understand that the rotating toothed disc 300, the transmission block 310 and the connecting block 500 can rotate together, and the transmission block 310 and the rotating toothed disc 300 can slide in the connecting block 500, which ensures smooth and unobstructed transmission, reduces wear, and prolongs the structural life. At the same time, this design is also convenient for later maintenance and component replacement, reducing maintenance costs. In some embodiments, the rotating gear disc 300 and the transmission block 310 are in plane contact transmission, which ensures that the contact area between the rotating gear disc 300 and the transmission block 310 is maximized, effectively reducing local stress concentration and avoiding premature wear of components. In addition, the plane contact also means that the friction coefficient during the transmission process is low, reducing power consumption and improving the overall energy efficiency of the system. In some embodiments, the transmission block 310 and the rotating handle 400 are in inclined plane contact transmission, which has a simple structure and enables a smaller input force to be converted into a larger output force, which not only improves the force conversion efficiency, but also makes the operation easier and more labor-saving.

[0061] Specifically, refer to Figure 2 and Figure 3 , the groove wall of the mounting groove 501 facing the rotating handle 400 is provided with an opening 5011, and the transmission block 310 and the rotating handle 400 are connected through the opening 5011. The existence of the opening 5011 allows the rotating handle 400 to establish a direct physical connection with the transmission block 310, simplifies the operation path, and allows the user to control the locking and unlocking of the structure more intuitively. Not only does it improve the convenience of operation, but it also reduces the energy loss caused by too many intermediate links, and improves the efficiency of the overall structure. Further, the transmission block 310 is provided with a transmission protrusion 311 on the side away from the rotating toothed disc 300, and the end of the transmission protrusion 311 is provided with a first inclined surface 3111, and correspondingly, the end of the accommodating groove 402 facing the first direction is provided with a second inclined surface 4021, and the second inclined surface 4021 is abutted against the first inclined surface 3111 for transmission, so as to drive the transmission block 310 to move toward one side of the rotating toothed disc 300, and drive the rotating toothed disc 300 to engage and fix with the fixed toothed disc 200. It is easy to understand that the precise matching of the first inclined surface 3111 and the second inclined surface 4021 ensures a smooth transition and precise positioning between the transmission block 310 and the rotating gear plate 300, thereby improving the comfort during use.

[0062] In some embodiments of the present invention, Figure 1 and Figure 2 , as shown, the rotating toothed disc 300 is fixedly connected to the connecting disc 600, for example, the connecting disc 600 is fixed to the connecting block 500 by screws. The connecting disc 600 is provided with a limiting groove 601, and the rotating handle 400 is provided with a limiting protrusion 410, which is slidably arranged in the limiting groove 601, effectively limiting the manual operation of the rotating handle 400, and the movement range of the reset torsion spring 700 for the automatic reset rotation of the rotating handle 400, preventing structural damage or functional failure that may be caused by excessive rotation, and enhancing the accuracy and safety of the operation.

[0063] From the above, it can be known that when the rotating gear disc 300 is in a locked state, the end of the transmission protrusion 311 abuts against the locking plane 401 of the rotating handle 400, and the other end of the transmission block 310 abuts against the rotating gear disc 300, and drives the rotating gear disc 300 to be fixedly engaged with the fixed gear disc 200. At this time, the rotating gear disc 300 cannot rotate.

[0064] When it is necessary to unlock the rotating gear disc 300 to adjust the angle, the user rotates the rotating handle 400 upwards, and under the pressure of the compression spring 210, the rotating gear disc 300 presses against the transmission block 310, and the transmission protrusion 311 enters the accommodating groove 402. At this time, the rotating gear disc 300, the transmission block 310, the rotating handle 400, the connecting block 500 and the connecting disc 600 can rotate together, and the rotating gear disc 300 and the fixed gear disc 200 can engage and rotate. During the engaged rotation, the rotating gear disc 300 can slide and retract in the mounting groove 501 of the connecting block 500, and the rotating gear disc 300 can be rotated clockwise or counterclockwise to adjust the angle.

[0065] After the adjustment is completed, the user releases the rotating handle 400, and the rotating handle 400 rotates downward under the action of the reset torsion spring 700, and the second inclined surface 4021 cooperates with the first inclined surface 3111 to drive the transmission block 310 to move toward one side of the fixed gear disc 200, and press the rotating gear disc 300 to engage with the fixed gear disc 200. At the same time, the end of the transmission protrusion 311 presses the locking plane 401 again, so that the rotating gear disc 300 is engaged and fixed with the fixed gear disc 200 to maintain the current position. At this time, the rotating gear disc 300 is in a locked state again.

[0066] The armrest according to the embodiment of the utility model includes a locking two-way flip structure according to the embodiment of the utility model. For example, the armrest body is connected to the connecting plate 600. The application of the above innovative locking two-way flip structure to the armrest significantly improves the functionality and user experience of the armrest, so that the armrest not only has excellent stability and reliability, but also has a smaller size and weight, a wider range of applications, and a more intuitive operation method, becoming an ideal choice for various occasions requiring auxiliary support.

[0067] Other structures and operations of the armrest according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0068] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A locking two-way flip structure, characterized in that: include: Pedestal; A fixed toothed disc, fixedly connected to the base; A rotating toothed disc is rotatably connected to the base, and an end surface of the rotating toothed disc is meshed with an end surface of the fixed toothed disc; A switch assembly, comprising a compression spring and a rotating handle, wherein the compression spring and the rotating handle are respectively connected to two ends of the rotating gear disc, and a locking plane is provided on a side of the rotating handle facing the rotating gear disc to drive the rotating gear disc to engage and fix with the fixed gear disc; The locking plane is provided with a receiving groove, the rotating handle is suitable for rotating in a first direction, and the compression spring is used to drive the rotating gear disc to engage with the receiving groove and rotate in mesh with the fixed gear disc; The rotating handle is suitable for rotating away from the first direction, and the rotating handle is drivingly connected with the rotating gear disc to drive the rotating gear disc to move toward one side of the fixed gear disc and re-engage and fix with the fixed gear disc.

2. A locking two-way flip structure according to claim 1, characterized in that: The base is also rotatably connected to a connecting block and a transmission block, the connecting block is provided with a mounting groove, the mounting groove extends in a direction parallel to the center line of the fixed gear disc and penetrates the connecting block, the transmission block and the rotating gear disc are sequentially installed in the mounting groove and slidably cooperate with the mounting groove, and the rotating handle is sequentially transmission-connected to the transmission block and the rotating gear disc.

3. A locking two-way flip structure according to claim 2, characterized in that: An opening is provided on a groove wall of the installation groove on a side facing the rotating handle, and a connection is established between the transmission block and the rotating handle via the opening.

4. The locking two-way flip structure according to claim 2, characterized in that: There is a plane abutment transmission between the rotating gear disc and the transmission block.

5. The locking two-way flip structure according to claim 2, characterized in that: The transmission block and the rotating handle are connected with each other in an inclined plane for transmission.

6. The locking two-way flip structure according to claim 5, characterized in that: A transmission protrusion is provided on the side of the transmission block facing away from the rotating gear plate, and a first inclined surface is provided on the end of the transmission protrusion. A second inclined surface is provided on the end of the accommodating groove facing the first direction, and the second inclined surface abuts against the first inclined surface for transmission to drive the transmission block to move toward one side of the rotating gear plate and drive the rotating gear plate to engage and fix with the fixed gear plate.

7. A locking two-way flip structure according to any one of claims 1 to 6, characterized in that: It also includes a return torsion spring, the two ends of which are respectively connected to the rotating handle and the base, and the force of the return torsion spring is greater than the force of the compression spring to drive the rotating handle to rotate away from the first direction and re-engage and fix the rotating gear disc and the fixed gear disc.

8. The locking two-way flip structure according to claim 1, characterized in that: The rotating gear disc is fixedly connected with a connecting disc, the connecting disc is provided with a limiting groove, the rotating handle is provided with a limiting protrusion, and the limiting protrusion is slidably arranged in the limiting groove.

9. The locking two-way flip structure according to claim 1, characterized in that: An annular installation cavity is provided between the fixed toothed disc and the rotating toothed disc, and there are multiple compression springs, which are evenly distributed in the installation cavity in the circumferential direction. One end of the compression spring is pressed and connected with the fixed toothed disc, and the other end is pressed and connected with the rotating toothed disc.

10. Armrest, characterized in that: It comprises a locking bidirectional flip structure as claimed in any one of claims 1 to 9.

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