Pedal rotating mechanism and chair

Abstract

The utility model relates to a pedal rotating mechanism and a chair, which comprise a pedal connecting piece and a pedal plate hinged with the pedal connecting piece, and the pedal connecting piece is provided with a hinged shaft through hole for a hinged shaft to penetrate through. A circumferential positioning structure is arranged between the hinge shaft and the hinge shaft through hole, the hinge shaft can axially move along the hinge shaft through hole in the first direction under the action of external force, and through holes allowing the two ends of the hinge shaft to be inserted into are formed in the pedal. A circumferential locking structure is arranged between the hinge shaft and the through hole, at least part of the circumferential locking structure is arranged on the hinge shaft, the rest part of the circumferential locking structure is arranged on the hole wall of the through hole, and the hinge shaft enables the circumferential locking structure to be unlocked under the pressure of external force in the first direction. And a reset piece which is arranged on the hinge shaft in a sleeving manner and enables the hinge shaft to reset in the second direction so as to force the circumferential locking structure to be locked again is further arranged in the hinge shaft through hole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of furniture, in particular to a foot pedal rotating mechanism and a chair. BACKGROUND

[0002] With the improvement of modern office environment and home life quality, ergonomic chairs as an important tool to improve sitting posture and comfort, their design and function are constantly innovating. As an important part of ergonomic chairs, foot pedal structure is crucial to improve the overall experience and health of users.

[0003] In the prior art, some foot pedal structures have problems such as inconvenient adjustment, fixed angle, and inability to achieve multi-position locking. For example, the foot pedal of some chairs can only be adjusted in a simple lifting or forward and backward sliding manner, and cannot be finely adjusted in angle according to the specific situation of the user, which can easily cause leg fatigue and discomfort after long-term use. In addition, the stability of some foot pedal structures is poor, and they are prone to shaking or shifting during use, affecting the user's experience and safety.

[0004] In Chinese Patent CN114831457A, a foot pedal rotating adjustment device, a foot pedal assembly, and a chair are disclosed, which include a reset member, a first gear, a second gear, and a first elastic member. The reset member is rotatably arranged on a rotating shaft, and the reset member has an installation space inside for installing the first gear and the second gear. The reset member is provided with a foot pedal connecting part for connecting the foot pedal. The first gear is fixed on the rotating shaft, and the second gear is pressed by the first elastic member to engage with the first gear. The reset member is also provided with a limiting groove for limiting the movement space of the second gear. When the reset member rotates, the limiting groove drives the second gear to rotate relative to the first gear. The edge of the first gear is also provided with a first limiting part for lifting the second gear when the second gear engages with the first limiting part to disengage the first gear.

[0005] Although the above-mentioned scheme realizes the rotating adjustment function of the foot pedal by setting the reset member, the first gear, the second gear, and the first elastic member, and can accurately control the angle position of the foot pedal through the design of the limiting groove and the first limiting part, avoiding the defects of fixed angle or difficult fine adjustment in traditional foot pedal structures, but the position of the foot pedal structure needs the user to apply pressure to the foot pedal with the foot to control the gear engagement and rotation, in order to achieve the angle or position adjustment required for the foot pedal. The control requirement of force is high, which leads to the position of the foot pedal being easily shifted by user action or external force interference, affecting the use experience and safety, and at the same time, since the user needs to continuously press the foot to adjust the angle of the foot pedal, the adjustment method is relatively cumbersome in actual operation, especially when the user needs to frequently adjust the angle to find the most comfortable sitting posture.

[0006] Therefore, we propose a pedal rotating mechanism, a pedal assembly and a seat comprising the same. Utility model content

[0007] The main purpose of the present application is to provide a pedal rotating mechanism, aiming at solving the problems of inconvenient adjustment, poor stability and complicated operation mode of the pedal structure in the prior art.

[0008] To achieve the above-mentioned purpose, the present application provides a pedal rotating mechanism, comprising a pedal connecting piece and a pedal plate hinged with the pedal connecting piece, wherein the pedal connecting piece has a hinge shaft through hole for a hinge shaft to pass through, a circumferential positioning structure is arranged between the hinge shaft and the hinge shaft through hole, and the hinge shaft can be displaced along the axial direction of the hinge shaft through hole under the action of an external force in a first direction, a through hole is arranged on the pedal plate for the two ends of the hinge shaft to be inserted respectively, a circumferential locking structure is arranged between the hinge shaft and the through hole, at least part of the circumferential locking structure is arranged on the hinge shaft, and the remaining part is arranged on the wall of the through hole, the hinge shaft makes the circumferential locking structure cancel the locking under the pressure of the external force in the first direction, and a reset member is further arranged in the hinge shaft through hole and makes the hinge shaft reset in a second direction so as to force the circumferential locking structure to lock again.

[0009] Preferably, the circumferential locking structure comprises a first tooth portion and a first tooth groove which are engaged with each other, and any one of the first tooth portion and the first tooth groove is arranged on the wall of the through hole, and the remaining one is arranged on the corresponding end of the hinge shaft.

[0010] Preferably, the first tooth portion is arranged on the two ends of the hinge shaft respectively.

[0011] Preferably, a limiting portion is arranged in one of the through holes, a limiting member is arranged in the other through hole, a stroke space for the displacement of the hinge shaft is formed between the limiting portion and the limiting member, the first tooth portion and the first tooth groove cancel the engagement locking when one of the first tooth portions of the hinge shaft abuts against the limiting member, and the first tooth portion and the first tooth groove engage with each other when the other first tooth portion of the hinge shaft abuts against the limiting portion.

[0012] Preferably, the reset member is a spring, a blocking shoulder is arranged in the middle of the inner wall of the hinge shaft through hole, one end of the reset member abuts against the blocking shoulder, and the other end of the reset member abuts against the limiting portion.

[0013] More preferably, the circumferential positioning structure comprises a first groove arranged on the wall of the hinge shaft through hole, and at least part of the first tooth portion is engaged with and matched with the first groove.

[0014] Preferably, the first recess is distributed along the axial direction of the hinge shaft through hole.

[0015] Preferably, one of the first tooth parts is integrally formed with the hinge shaft, and the other first tooth part is connected with the hinge shaft through a plug-in assembly structure.

[0016] Preferably, the plug-in assembly structure comprises a socket arranged at the center of the first tooth part, the hinge shaft is inserted into the socket, and the socket and the hinge shaft are fixedly connected in the axial direction and the circumferential direction.

[0017] To achieve the above-mentioned purposes, the application also provides a chair, which comprises a foot pedal rotating mechanism as described above.

[0018] The beneficial effects of the technical scheme of the utility model lie in:

[0019] When the hinge shaft starts to be inserted into the hinge shaft through hole, the first recess serves as an initial guide structure, so that the first tooth part can gradually approach the first tooth groove along the shape trajectory thereof. With the deepening of the insertion process, the first tooth part is guided by the first recess to accurately realize the butt joint with the first tooth groove, thereby ensuring the meshing precision between the first tooth part and the first tooth groove and improving the efficiency and accuracy of assembly. After the contact connection of the two, a close fitting relationship is formed between the first tooth part and the first tooth groove, which effectively prevents the circumferential shaking and accidental rotation of the hinge shaft in the hinge shaft through hole.

[0020] When the foot pedal is in a normal use state, the cooperation between the first tooth part and the first tooth groove can withstand a large torque and axial force, thereby ensuring the stable and reliable connection between the foot pedal and the foot pedal connecting piece. When the angle of the foot pedal needs to be adjusted, the external force applied by the operator will temporarily release the meshing between the first tooth part and the first tooth groove, at which time the first recess still plays a certain limiting role on the first tooth part, so that it will not deviate from the predetermined rotation trajectory range. After the angle adjustment is completed, the external force is removed, and the first tooth part is quickly re-meshed with the first tooth groove under the action of the reset spring, thereby returning to a stable state.

[0021] In summary, the operation process of the angle adjustment of the foot pedal is simplified, and the precision and stability of the angle adjustment are improved. At the same time, due to the meshing and matching relationship between the first recess and the first tooth part, the force acting on the foot pedal can be effectively dispersed, the risk of equipment damage caused by excessive local force can be reduced, and the service life of the equipment is further prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a perspective view of the foot pedal rotating mechanism in an embodiment of the application;

[0023] Figure 2 is a schematic view of the internal structure of the foot pedal rotating mechanism in an embodiment of the application;

[0024] Figure 3 for Figure 2 a local enlarged view of the A area in the middle;

[0025] Figure 4 for a half sectional view of the pedal rotating mechanism in an embodiment of the present application;

[0026] Figure 5 for a half sectional view of the rotating adjusting mechanism in an embodiment of the present application;

[0027] Figure 6 for a side view of the pedal rotating mechanism in an embodiment of the present application;

[0028] Figure 7 for Figure 6 the A sectional view.

[0029] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments in conjunction with the drawings. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar components have the same reference numerals throughout. The embodiments described below are exemplary, and are intended to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work under the premise that the embodiments fall within the scope of protection of the present application.

[0031] In addition, if the present application involves the description of "first", "second", etc., it is only for the purpose of description, such as for distinguishing the same or similar elements, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the premise that those skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0032] Embodiment one

[0033] Referring to Figures 1-3The utility model provides a kind of footrest rotating mechanism including footrest connecting piece 100 and the footrest connecting piece 100 hinged footboard 200, footrest connecting piece 100 has the hinged axle through hole 300 of hinged axle 400, hinged axle 400 and hinged axle through hole 300 between being equipped with circumferential positioning structure 500, and hinged axle 400 is under the action of external force in first direction can be along the axial displacement of hinged axle through hole 300, hinged axle 400 and through hole 201 are respectively inserted in the both ends of hinged axle 400 on footboard 200, hinged axle 400 and through hole 201 between being equipped with circumferential locking structure 700, at least part of circumferential locking structure 700 is equipped in hinged axle 400, remaining part is equipped in through hole 201 hole wall, hinged axle 400 is under the pressure of external force in first direction, so that circumferential locking structure 700 cancels locking, hinged axle 400 is also equipped with reset member 600 in hinged axle through hole 300 on hinged axle 400, and hinged axle 400 is reset in second direction so as to force circumferential locking structure 700 relocking. First direction and second direction are opposite directions.

[0034] In the embodiment, by setting circumferential positioning structure 500 and circumferential locking structure 700, flexible adjustment and stable locking function of footrest rotating mechanism are realized. Specifically, when the angle of footboard 200 needs to be adjusted, only when the pressure of external force in first direction, circumferential locking structure 700 can cancel locking, so that footboard 200 can rotate smoothly around hinged axle 400 to preset angle. At this time, hinged axle 400 is moved in first direction such as inward compression direction under the action of axial pressure, so that first tooth part 701 arranged at the end of hinged axle overcomes the elastic force of reset member 600 and is disengaged from first tooth groove 702 of through hole 201 hole wall, and the circumferential locking is released. When angle adjustment is completed, remove external force, reset member 600 is reset by its own elastic deformation and drives hinged axle 400 to return in second direction, forces first tooth part 701 to re-embed in first tooth groove 702, and realizes circumferential rigid engagement locking.

[0035] Further, reset member 600 is preferably a spiral compression spring sleeved in the middle section of hinged axle 400, and the two ends thereof are respectively abutted against blocking shoulder 602 provided in the middle of the inner wall of hinged axle through hole 300 and limiting part 601 provided in one of through holes 201, so as to be compressed and stored energy when hinged axle is axially displaced, and to drive hinged axle to reset by elastic restoring force after external force is released, to ensure that locking structure is quickly and accurately re-engaged.

[0036] In summary, in the embodiment, the axial slidable hinge shaft cooperates with the elastic return member to realize the one-hand operation logic of the foot pedal 200 "pressing to unlock-rotating to adjust-releasing to lock", which simplifies the multi-component linkage in the rotating locking mechanism in the prior art into single axial movement driving. Meanwhile, it ensures quick separation when unlocking and tight fitting when locking through the pre-tightening force of the return member 600, thereby improving the connection stability and reliability between the foot pedal 200 and the foot pedal connecting member 100.

[0037] In one of the embodiments, the circumferential locking structure 700 includes a first tooth portion 701 and a first tooth groove 702 that are engaged with each other, and any one of the first tooth portion 701 and the first tooth groove 702 is arranged on the hole wall of the through hole 201, and the remaining one is arranged on the corresponding end of the hinge shaft 400.

[0038] Specifically, the first tooth portion 701 is arranged in an involute gear structure or a rectangular tooth portion structure and is fixedly connected to the two ends of the hinge shaft 400 by interference fit, and forms high-precision engagement with the first tooth groove 702 on the hole wall of the through hole 201.

[0039] The first tooth groove 702 is circumferentially arranged on the hole wall of the through hole 201, and the cross section of the first tooth groove 702 is arranged in an involute or rectangular cross section and forms a close tooth-shaped fit with the corresponding end of the hinge shaft 400.

[0040] Further, when the hinge shaft 400 is correctly installed in place, the first tooth portion 701 and the first tooth groove 702 are precisely docked, thereby ensuring the stability and reliability of the foot pedal 200 in the non-working state.

[0041] In summary, in the embodiment, the high-precision tooth-shaped fit between the first tooth portion 701 and the first tooth groove 702 can ensure that the foot pedal 200 maintains the correct position in the non-working state, avoiding instability due to looseness. At the same time, the first tooth portion 701 and the first tooth groove 702 can be disengaged by simply pressing, thereby easily adjusting the angle of the foot pedal.

[0042] Referring to Figures 4-5 In one of the embodiments, a limiting portion 601 is arranged in one of the through holes 201, and a limiting member 603 is arranged in the other through hole 201, and a stroke space for displacement of the hinge shaft 400 is formed between the limiting portion 601 and the limiting member 603. When one of the first tooth portions 701 of the hinge shaft 400 abuts against the limiting member 603, the first tooth portion 701 and the first tooth groove 702 are disengaged and locked, and when the other first tooth portion 701 of the hinge shaft 400 abuts against the limiting portion 601, the first tooth portion 701 and the first tooth groove 702 are engaged and locked.

[0043] In this embodiment, the movement range of the hinge shaft 400 in the first direction unlocking direction and the second direction locking direction is limited by the stroke space formed between the limiting part 601 and the limiting member 603, thereby controlling the axial displacement of the hinge shaft 300, and the stroke space formed above is matched with the elastic force of the reset member 600, so that the hinge shaft 400 can be stably moved to the unlocking position under the action of external force and accurately reset to the locking position after the external force is released.

[0044] In one of the embodiments, the circumferential positioning structure 500 includes a first groove 501 arranged on the hole wall of the hinge shaft through hole 300, and at least part of the first tooth part 701 is engaged and matched with the first groove 501.

[0045] Specifically, the first groove 501 is distributed along the hole wall of the hinge shaft through hole 300 in the radial direction, and the cross-sectional shape thereof is matched with the tooth shape of the first tooth part 701 and is in contact connection with the first tooth groove 702, so as to guide the first tooth part 701 to be accurately embedded in the pre-set position when the hinge shaft 400 is inserted into the hinge shaft through hole 300.

[0046] When the hinge shaft 400 starts to be inserted into the hinge shaft through hole 300, the first groove 501 serves as an initial guide structure, so that the first tooth part 701 can gradually approach the first tooth groove 702 along the shape trajectory thereof. With the deepening of the insertion process, the first tooth part 701 is accurately connected with the first tooth groove 702 under the guidance of the first groove 501, so as to ensure the engagement accuracy between the first tooth part 701 and the first tooth groove 702 and improve the efficiency and accuracy of assembly.

[0047] Further, after the contact connection, a close fitting relationship is formed between the first tooth part 701 and the first tooth groove 702, which effectively prevents the circumferential shaking and accidental rotation of the hinge shaft 400 in the hinge shaft through hole 300.

[0048] When the foot pedal 200 is in the normal use state, the fitting of the first tooth part 701 and the first tooth groove 702 can withstand a large torque and axial force, so as to ensure the stable and reliable connection between the foot pedal 200 and the foot pedal connecting member 100. When the angle of the foot pedal 200 needs to be adjusted, the external force applied by the operator will temporarily release the engagement between the first tooth part 701 and the first tooth groove 702, at this time, the first groove 501 still plays a certain limiting role on the first tooth part 701, so that it will not deviate from the predetermined rotation track range. After the angle adjustment is completed, the external force is removed, the first tooth part 701 is quickly re-engaged with the first tooth groove 702 under the action of the reset spring 600, and returns to the stable state.

[0049] In summary, the operation process of the pedal angle adjustment is simplified, the accuracy and stability of the angle adjustment are improved, and a more convenient and efficient user experience is provided. Meanwhile, due to the meshing matching relationship between the first groove 501 and the first tooth part 701, the force acting on the pedal can be effectively dispersed, the risk of equipment damage caused by excessive local force can be reduced, and the service life of the equipment is further prolonged.

[0050] Referring to Figures 6-7 In one of the embodiments, one of the first tooth parts 701 is integrally formed with the hinge shaft 400, and the other first tooth part 701 is connected with the hinge shaft 400 through a plug-in assembly structure.

[0051] In this embodiment, by adopting the design of integrally forming part of the first tooth part 701 with the hinge shaft 400, the problem of accuracy reduction caused by assembly error or loose connection is avoided, the strength and rigidity of the part are improved, and the movement accuracy and stability of the related structure during the pedal angle adjustment are ensured. As for the first tooth part 701 and the hinge shaft 400 connected through the plug-in assembly structure, the operator can quickly separate or combine the related parts through simple plug-in operation when it is necessary to maintain the pedal rotating mechanism, replace parts or adjust according to different application scenarios, while ensuring the reliability of the connection.

[0052] In one of the embodiments, the plug-in assembly structure includes a socket 703 arranged at the center of the first tooth part 701, the hinge shaft 400 is inserted into the socket 703, and the socket 703 and the hinge shaft 400 are axially fixed and circumferentially fixed and connected.

[0053] In this embodiment, the axial fixed connection ensures that the hinge shaft 400 always remains in the correct position during work, avoids the problems of component interference or movement accuracy reduction caused by axial displacement, and guarantees the accuracy and stability of the pedal angle adjustment. The circumferential fixed connection can ensure that the torque acting on the pedal 200 can be effectively transmitted to the socket 703 and the entire pedal connecting piece 100 through the hinge shaft 400, without relative sliding in the circumferential direction, and guarantees the efficiency and accuracy of force transmission.

[0054] Embodiment Two

[0055] This embodiment provides a chair, which includes the pedal rotating mechanism of embodiment one.

[0056] It is to be understood that the terminology "including", "comprising", or any other variation thereof, is intended to cover a non-exclusive inclusion such that process, methods, articles, or pedal rotation mechanisms encompassing a series of elements includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or pedal rotation mechanism. By way of illustration, a process, method, article, or pedal rotation mechanism that comprises a list of elements does not include only those elements but is inclusive of other elements not expressly listed or inherent to such process, method, article, or pedal rotation mechanism.

[0057] The above description is merely the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A pedal rotation mechanism comprising a pedal link (100) and a pedal plate (200) hinged to the pedal link (100), the pedal link (100) having a hinge shaft through hole (300) for a hinge shaft (400) to pass through, characterized in that, The hinge shaft (400) and the hinge shaft through hole (300) are provided with a circumferential positioning structure (500), and the hinge shaft (400) can be displaced along the axial direction of the hinge shaft through hole (300) under the action of an external force in a first direction, and the hinge shaft (400) is provided with a through hole (201) for respectively inserting two ends of the hinge shaft (400), a circumferential locking structure (700) is arranged between the hinge shaft (400) and the through hole (201), at least part of the circumferential locking structure (700) is arranged on the hinge shaft (400), and the remaining part is arranged on the hole wall of the through hole (201), the hinge shaft (400) is pressed by an external force in the first direction, so that the circumferential locking structure (700) is unlocked, and a reset member (600) is further arranged in the hinge shaft through hole (300) and is sleeved on the hinge shaft (400), and the hinge shaft (400) is reset in a second direction, so that the circumferential locking structure (700) is relocked.

2. A foot-operated rotating mechanism according to claim 1, wherein The circumferential locking structure (700) comprises a first tooth portion (701) and a first tooth groove (702) which are engaged with each other, and any one of the first tooth portion (701) and the first tooth groove (702) is arranged on the hole wall of the through hole (201), and the remaining one is arranged on the corresponding end of the hinge shaft (400).

3. A foot-operated rotating mechanism according to claim 2, wherein The first tooth portion (701) is arranged on each end of the hinge shaft (400).

4. A foot-operated rotating mechanism according to claim 3, wherein A limiting portion (601) is arranged in one of the through holes (201), and a limiting member (603) is arranged in the other through hole (201), a stroke space for displacement of the hinge shaft (400) is formed between the limiting portion (601) and the limiting member (603), when one of the first tooth portions (701) of the hinge shaft (400) abuts against the limiting member (603), the first tooth portion (701) and the first tooth groove (702) are unlocked, and when the other first tooth portion (701) of the hinge shaft (400) abuts against the limiting portion (601), the first tooth portion (701) and the first tooth groove (702) are locked.

5. A foot-operated rotating mechanism according to claim 4, wherein The reset member (600) is a spring, a blocking shoulder (602) is arranged in the middle of the inner wall of the hinge shaft through hole (300), one end of the reset member (600) abuts against the blocking shoulder (602), and the other end of the reset member (600) abuts against the limiting portion (601).

6. A foot-operated rotating mechanism according to claim 3, wherein The circumferential positioning structure (500) comprises a first groove (501) arranged on the hole wall of the hinge shaft through hole (300), and at least part of the first tooth portion (701) is engaged and matched with the first groove (501).

7. A foot-operated rotating mechanism according to claim 6, wherein The first groove (501) is distributed along the axial direction of the hinge shaft through hole (300).

8. A foot-operated rotating mechanism according to claim 3, wherein One of the first tooth portions (701) and the hinge shaft (400) are integrally formed, and the other first tooth portion (701) and the hinge shaft (400) are connected through a plug-in assembly structure.

9. A foot-operated rotating mechanism according to claim 8, wherein The plug-in assembly structure comprises a socket (703) arranged at the center of the first tooth part (701), the hinge shaft (400) is inserted into the socket (703), and the socket (703) and the hinge shaft (400) are fixedly connected in the axial direction and the circumferential direction.

10. A chair, characterized by The chair comprises the foot pedal rotating mechanism according to any one of claims 1-9.

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