CN115355240B

CN115355240B - Folding positioning mechanism

Info

Publication number: CN115355240B
Application number: CN202211290096.0A
Authority: CN
Inventors: 王振; 吕心力; 季猛
Original assignee: Praseodymium Tus Changzhou Intelligent Technology Co ltd
Current assignee: Praseodymium Tus Changzhou Intelligent Technology Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-03-14
Anticipated expiration: 2042-10-21
Also published as: CN115355240A

Abstract

The invention relates to the field of machinery, in particular to a folding positioning mechanism. A fold positioning mechanism comprising a folding assembly and a positioning assembly, the folding assembly comprising: a fixing member; the rotating member is hinged and assembled on the fixed member; the positioning assembly comprises: a first axial member; the locking gear is movably assembled on the first axial member and rotates in a single direction; the second axial part is in sliding fit with the first axial part, teeth are formed on the second axial part, and the second axial part is meshed with the locking gear to realize stepless locking; the limiting block is assembled on the first axial piece in a sliding mode, a limiting groove is formed in the limiting block, the limiting groove limits the position of the locking gear, and the limiting block is slid and limits the locking gear to be far away from the second axial piece when unlocking is carried out; one end of the positioning assembly is hinged to the fixing piece, and the other end of the positioning assembly is hinged to the rotating piece. The technical problems that stepless self-locking cannot be achieved by a folding positioning mechanism in the prior art and operation is inconvenient are solved.

Description

Folding positioning mechanism

Technical Field

The invention relates to the field of machinery, in particular to a folding positioning mechanism.

Background

In the prior art, in order to satisfy the demand of structure, there are more and more hinge structures, and hinge structure's setting also makes whole device can be in different forms to satisfy different user demands. Like articles such as foldable scooter, foldable bicycle, foldable seat, under the user state, need open folding structure, make it be in operating condition, just need fold it when need not to use to reduce the volume, conveniently accomodate, transport etc. therefore folding structure often need have the locking structure, in order to satisfy foretell demand.

For example, document CN2410460Y discloses a folding positioning mechanism, and specifically discloses: a folding positioning mechanism comprises a fixing part and a rotating part, wherein positioning plates are symmetrically arranged on two sides of the fixing part respectively, the rotating part is positioned in the positioning plates, an axle hole penetrates through the two positioning plates and the rotating part, a hollow axle sleeve is arranged in the axle hole, the rotating part can rotate around the axle sleeve, the rotating part rotates around the axial direction of the fixing part, and the folding positioning mechanism is folded; the rotating part rotates around the shaft in the direction departing from the fixing part, and the folding positioning machine is in a release state; one side of the positioning plate is provided with a positioning guide hole, and the position of the rotary member corresponding to the positioning guide hole is provided with at least one positioning hole for folding or unfolding positioning. The folding positioning mechanism can only be in a folding state and a releasing state, and the requirement of stepless self-locking cannot be met; and the positioning hook needs to be inserted into the positioning hole to keep the locking state of the rotating member, so that the operation is inconvenient.

Disclosure of Invention

In order to solve the technical problems that the folding positioning mechanism in the prior art cannot realize stepless self-locking and is inconvenient to operate, the invention provides a folding positioning mechanism which solves the technical problems. The technical scheme of the invention is as follows:

a fold positioning mechanism comprising a folding assembly and a positioning assembly, the folding assembly comprising:

a fixing member;

the rotating member is hinged and assembled on the fixed member;

the positioning assembly comprises:

a first axial member;

the locking gear is movably assembled on the first axial piece and rotates in a single direction;

the second axial part is in sliding telescopic fit with the first axial part, teeth are formed on the second axial part, and the second axial part is meshed with the locking gear to realize stepless locking;

the limiting block is assembled on the first axial piece in a sliding mode, a limiting groove is formed in the limiting block, the limiting groove limits the position of the locking gear, and when the locking gear is unlocked, the limiting block slides and limits the locking gear to be far away from the second axial piece;

one end of the positioning assembly is hinged to the fixing piece, and the other end of the positioning assembly is hinged to the rotating piece.

The folding positioning mechanism comprises a folding assembly and a positioning assembly, wherein the positioning assembly is arranged on the folding assembly, and the folding positioning state of the folding assembly can be controlled by controlling the length of the positioning assembly; for the positioning assembly, the first axial member and the second axial member are in sliding telescopic fit, and the length of the positioning assembly is variable. Specifically, the locking between the first axial member and the second axial member can be realized through the meshing of a locking gear on the first axial member and teeth on the second axial member; because the locking gear rotates in one direction, when the second axial part is meshed with the locking gear, the second axial part can only slide in one direction relative to the first axial part, and stepless self-locking is realized; during unlocking, the limiting block is adopted to slide, the locking gear is limited to be far away from the second axial part, the second axial part is not meshed with the locking gear any more, and the second axial part can slide reversely to realize unlocking.

According to one embodiment of the invention, the number of the lock gears is two, and the two lock gears are mounted on both sides of the first axial member in a manner of being capable of deflecting.

According to one embodiment of the invention, the locking gear is assembled on a gear shaft, one end of the gear shaft is assembled in a deflection way, and the other end of the gear shaft extends into the limiting groove of the limiting block.

According to one embodiment of the invention, the locking gear is assembled through a deflection structure, the deflection structure is connected with an elastic piece, and under the action of the elastic piece, the gear shaft deflects outwards and abuts against the outer side wall of the limiting groove.

According to an embodiment of the present invention, the deflection structure includes a first swinging member and a second swinging member, the first swinging member is hinge-fitted, a first end of the first swinging member is fitted with the lock gear, a second end of the first swinging member is hinge-fitted with a first end of the second swinging member, and the elastic member acts on the second end of the second swinging member.

According to an embodiment of the present invention, the second ends of the two second swinging members are hinged by a hinge shaft, the elastic member acts on the hinge shaft, and a limiting portion is formed on the hinge shaft and slides along a limiting hole.

According to one embodiment of the present invention, a window is formed on the first axial member corresponding to the lock gear, and the lock gear portion is engaged with the second axial member through the window.

According to one embodiment of the invention, the number of the limiting grooves is two, the two limiting grooves are symmetrically arranged, and the outer side walls of the two limiting grooves extend outwards in an expanding manner.

According to one embodiment of the invention, the locking mechanism further comprises a resetting piece, the resetting piece acts on the limiting block, under the action of the resetting piece, the limiting block is in an initial position, and the distance between the two locking gears is minimum.

According to one embodiment of the invention, the device further comprises a mounting seat, wherein the mounting seat is assembled on the first axial member, and the locking gear, the limiting block, the deflection structure, the elastic member and the reset member are assembled on the mounting seat.

Based on the technical scheme, the invention can realize the technical effects that:

1. the folding positioning mechanism comprises a folding assembly and a positioning assembly, wherein the positioning assembly is arranged on the folding assembly, and the folding positioning state of the folding assembly can be controlled by controlling the length of the positioning assembly; for the positioning assembly, the first axial member and the second axial member are in sliding telescopic fit, and the length of the positioning assembly is variable. Specifically, the locking between the first axial member and the second axial member can be realized through the meshing of a locking gear on the first axial member and teeth on the second axial member; because the locking gear rotates in one direction, when the second axial part is meshed with the locking gear, the second axial part can only slide in one direction relative to the first axial part, and stepless self-locking is realized; during unlocking, the limiting block is adopted to slide, the locking gear is limited to be far away from the second axial part, the second axial part is not meshed with the locking gear any more, and the second axial part can slide reversely to realize unlocking. Therefore, the folding positioning mechanism can realize stepless self-locking positioning so as to control the folding assembly to be in different folding states; when unlocking, the unlocking can be realized only by sliding the limiting block and reversely sliding the second axial part, so that the operation is convenient;

2. according to the folding positioning mechanism, the number of the locking gears is two, the two locking gears can be meshed with the second axial member from two sides of the second axial member, and locking is more stable; the locking gears are assembled on the gear shaft, one end of the gear shaft is assembled in a deflection mode, and the other end of the gear shaft extends into the limiting groove of the limiting block, so that the locking gears can deflect in the range limited by the limiting groove, and further the two locking gears can be limited to be close to or far away from each other, and the locking or unlocking matched with the second axial part is realized;

3. according to the folding positioning mechanism, the locking gear is assembled through the deflection structure, the deflection structure is connected with the elastic piece, the gear shaft can be deflected outwards to abut against the outer side wall of the limiting groove under the pulling action of the elastic piece, the gear shaft can be accurately limited in position by the limiting groove, and the situation that the locking gear shakes in the limiting groove cannot occur;

4. the folding positioning mechanism comprises a first swinging piece and a second swinging piece which are hinged with each other, wherein the two first swinging pieces are respectively assembled with two locking gears, the two second swinging pieces are hinged through a hinge shaft, and an elastic piece only needs to act on the hinge shaft to act on the two second swinging pieces, so that the two locking gears are deflected outwards to abut against the outer side wall of a corresponding limiting groove; a limiting part is further formed on the hinged shaft and slides along the limiting hole, so that the deflection range of the locking gear can be limited;

5. according to the folding positioning mechanism, the reset piece is arranged to act on the limiting block, the limiting block is located at an initial position under the action of the reset piece, the distance between the two locking gears is the minimum, namely when the limiting block is located at the initial position, the second axial piece can slide and is meshed with the two locking gears, and stepless self-locking is achieved; during unlocking, the two locking gears can be limited to deviate only by overcoming the action of the reset piece and sliding the limiting block, and the second axial piece slides in the reverse direction to be disengaged from the two locking gears, so that unlocking is realized;

6. the folding positioning mechanism is provided with the mounting seat, and the locking gear, the limiting block, the deflection structure, the elastic piece and the reset piece are all assembled on the mounting seat, so that an integral modular structure can be realized.

Drawings

FIG. 1 is a schematic structural view of the folding positioning mechanism of the present invention in an unfolded state;

FIG. 2 is a schematic view of the folding positioning mechanism of the present invention in a folded state;

FIG. 3 is a schematic front view of the positioning assembly;

FIG. 4 is a schematic view of the reverse side of the positioning assembly;

FIG. 5 is a schematic view of the first and second axial members in sliding engagement;

FIG. 6 is a schematic view of the first axial member;

FIG. 7 is a schematic view of the construction of the sleeve at the end of the first axial member;

FIG. 8 is a schematic structural view of the second axial member;

FIG. 9 is a perspective view of the locking gear, the limiting block, the deflection structure, the elastic member and the reset member assembled on the mounting seat;

FIG. 10 is a schematic structural view of the front side of the structure shown in FIG. 9;

FIG. 11 is a schematic view of a structure opposite to that shown in FIG. 9;

FIG. 12 is a schematic structural view of a stopper;

FIG. 13 is a perspective view of the mounting base;

FIG. 14 is a front view of the mounting base;

FIG. 15 is a schematic structural view of the foldable positioning mechanism of the present invention applied to a stool, wherein the stool is in an open state;

FIG. 16 is a schematic structural view of the foldable positioning mechanism of the present invention applied to a fitness stool, wherein the fitness stool is in a storage state;

in the figure: 1-a first axial member; 11-a window; 12-pipe sleeve; 2-a lock gear; 21-gear shaft; 3-a second axial element; 31-a tine head; 311-teeth; 32-connecting sleeves; 4-a limiting block; 41-a limiting groove; 411-an outer side wall; 42-a guide bar; 5-a deflection structure; 51-a first oscillating member; 52-a second oscillating member; 6-an elastic member; 61-a hinge axis; 7-a sliding assembly; 71-a slide rail; 72-a slide block; 8-a reset member; 9-a mounting seat; 91-a first seat body; 911-a limiting hole; 92-a second seat; 921-mounting groove; 93-axial through hole; 94-lateral opening; 10-a fixing member; 20-a rotating member; 201-a support leg; 30-a guide rail; 40-a slide seat; 50-a folding seat; 60-vertical supports; 70-a footrest member.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1 to 14, the embodiment provides a folding positioning mechanism, which includes a folding assembly and a positioning assembly, wherein the folding assembly includes a fixed member 10 and a rotating member 20, the positioning assembly includes a first axial member 1 and a second axial member 3, the first axial member 1 and the second axial member 3 are in sliding telescopic fit, a locking gear 2 rotating in one direction is assembled on the first axial member 1, a tooth 311 is formed on the second axial member 3, and when the second axial member 3 slides in the axial forward direction along the first axial member 1, the tooth 311 can be engaged with the locking gear 2, so as to realize stepless self-locking; when unlocking, the locking gear 2 can be driven to move away from the teeth 311 of the second axial member 3, and then the second axial member 3 is slid reversely to unlock. One end of the positioning assembly is hinged to the fixing member 10, the other end of the positioning assembly is hinged to the rotating member 20, and the positioning assembly can play a role in locking and positioning the rotating member 20 relative to the fixing member 10 in real time in the process that the rotating member 20 of the folding assembly deflects relative to the fixing member 10.

The folding assembly comprises a fixed member 10 and a rotating member 20, one end of the rotating member 20 is hinged with the fixed member 10, and the rotating member 20 can deflect relative to the fixed member 10. In this embodiment, the fixed member 10 is provided in a bracket structure, and the rotating member 20 is provided in a long arm structure.

The positioning assembly is arranged on the folding assembly, in this embodiment, the positioning assembly comprises a first axial member 1 and a second axial member 3 which are in sliding telescopic fit, one end of the first axial member 1, which is far away from the second axial member 3, is hinged with the rotating member 20, and one end of the second axial member 3, which is far away from the first axial member 1, is hinged with the fixing member 10.

The first axial member 1 extends axially and has a sliding fit space, and in this embodiment, the first axial member 1 is a tubular member having a hollow inner structure to facilitate the fitting of the second axial member 3. Besides, the first axial member 1 may be provided as a structure extending axially and having a sliding fit space, other than a tubular member.

As a preferable solution of this embodiment, in order to facilitate the engagement of the lock gear 2 with the teeth 311 of the second axial member 3, the side wall of the first axial member 1 is formed with a window 11, and the lock gear 2 can be partially engaged with the teeth 311 of the second axial member 3 through the window 11. Further preferably, the number of the windows 11 may be plural; alternatively, the window 11 extends axially along the side wall of the first axial member 1, so that when the locking gear 2 is fitted in a different position of the first axial member 1, it is still possible to lock with the second axial member 3 through the window 11, the locking point being adjustable.

As a preferable aspect of the present embodiment, in order to facilitate the sliding assembly of the second axial member 3 in the first axial member 1 and reduce the friction force when the two slide, the end of the first axial member 1 may be provided with the socket 12, the socket 12 may be engaged with the end of the first axial member 1, and the socket 12 may function to separate the second axial member 3 from the first axial member 1, so that a gap is formed between the outer wall of the second axial member 3 and the inner wall of the first axial member 1, and the friction force generated when the two slide relatively is small.

One end of the second axial member 3 extends into the first axial member 1 and is slidably retractable with respect to the first axial member 1. Specifically, the second axial member 3 may protrude from an end of the first axial member 1 where the socket 12 is provided, and the second axial member 3 is formed with teeth 311.

As a preferable technical solution of this embodiment, the second axial member 3 may be configured as a tubular member adapted to the inner hole of the sleeve 12, and in order to prevent the second axial member 3 from rotating in the first axial member 1, the cross section of the second axial member 3 and the inner hole of the sleeve 12 may be configured as non-circular, and in this embodiment, the second axial member 3 is configured as a square tube.

As a preferable technical solution of this embodiment, the end of the second axial member 3 may be connected with a tooth head 31, and the side of the tooth head 31 is formed with teeth 311, specifically, the end of the second axial member 3 and the tooth head 31 may be fixedly assembled by a connecting sleeve 32, the connecting sleeve 32 protrudes out of the outer surface of the second axial member 3, the outer shape of the connecting sleeve 32 is adapted to the shape of the inner hole of the first axial member 1, and when the second axial member 3 slides in the first axial member 1, the connecting sleeve 32 is in sliding fit with the inner circumferential surface of the first axial member 1. Through the matching of the connecting sleeve 32 and the pipe sleeve 12, a circumferential gap exists between the second axial element 3 and the first axial element 1, and the sliding friction force is small.

The locking gear 2 is movably mounted on the first axial member 1, the position of the locking gear 2 relative to the first axial member 1 being variable. In the embodiment, the locking gear 2 can be assembled on the first axial member 1 in a deflection manner, the locking gear 2 can deflect relative to the first axial member 1 and further approach and depart from the first axial member 1, when locking is needed, the locking gear 2 approaches to the first axial member 1, the locking gear 2 extends into the window 11, the second axial member 3 slides forwards along the first axial member 1, and the teeth 311 can be meshed with the locking gear 2, so that stepless self-locking is realized; when the unlocking is needed, the locking gear 2 deflects to be far away from the first axial piece 1 and the window 11, and the second axial piece 3 can slide reversely along the first axial piece 1, so that the unlocking is realized.

In the present embodiment, the number of the lock gears 2 is two, and the two lock gears 2 are symmetrically mounted on both sides of the first axial member 1. Taking the assembly of one locking gear 2 as an example, the locking gear 2 is assembled on the gear shaft 21 and rotates in one direction, the locking gear 2 is assembled in a deflection way through the deflection structure 5, and the deflection structure 5 is connected with the elastic piece 6. Specifically, the swing structure 5 includes a first swing member 51 and a second swing member 52, the first swing member 51 is hinge-fitted at a middle portion thereof, the lock gear 2 is fitted at a first end of the first swing member 51, a second end of the first swing member 51 is hinge-fitted with a first end of the second swing member 52, and the elastic member 6 acts on a second end of the second swing member 52. The locking gear 2 can be assembled on the gear shaft 21 through a one-way bearing, and a one-way self-locking gear can be selected as long as one-way rotation can be realized.

As a preferred solution of the present embodiment, the elastic member 6 acts on the second ends of the two second swinging members 52 at the same time, specifically, the two second swinging members 52 are located inside the two first swinging members 51, the second ends of the two second swinging members 52 are hinged by the hinge shaft 61, and the elastic member 6 acts on the hinge shaft 61. Elastic component 6 can realize acting on two second swing pieces 52 simultaneously through acting on articulated shaft 61, and elastic component 6 draws and draws articulated shaft 61, and accessible beat structure 5 drives locking gear 2 and outwards deflects, conveniently adopts stopper 4 to carry on spacingly to locking gear 2. Further preferably, a limiting hole 911 is further formed, the hinge shaft 61 extends to form a limiting portion, and the limiting portion extends into the limiting hole 911 and slides along the limiting hole 911, so as to limit the deflection range of the deflection structure 5. The elastic member 6 may be selected from, but not limited to, a spring.

Stopper 4 assembles on first axial component 1 axially sliding, is formed with spacing groove 41 on stopper 4, and spacing groove 41 is two, and two spacing groove 41 symmetries set up, and locking gear 2's gear shaft 21 stretches to in the spacing groove 41, and under the effect of elastic component 6 and beat structure 5, locking gear 2's gear shaft 21 supports and leans on the lateral wall 411 of spacing groove 41, and the lateral wall 411 of spacing groove 41 can change the position of spacing locking gear 2.

As the preferred technical scheme of this embodiment, the outer side walls 411 of the two limiting grooves 41 are in an outward-expanding shape, and the distance between the two locking gears 2 is adjustable under the limiting effect of the limiting block 4.

As the preferred technical scheme of this embodiment, stopper 4 passes through slip subassembly 7 and slides the assembly, and slip subassembly 7 includes slide rail 71 and slider 72, and slide rail 71 is by being parallel to the fixed assembly of axial, and slider 72 is fixed on stopper 4.

As the preferred technical scheme of this embodiment, stopper 4 is in initial position under the effect of piece 8 that resets, and when stopper 4 was in initial position, stopper 4 spacing two locking gear 2 were close to, and locking gear 2 stretches into in the window 11 of first axial component 1. When the limiting block 4 slides against the acting force of the reset piece 8, the two locking gears 2 gradually depart from each other and are far away from the window 11 of the first axial piece 1, so that the first axial piece 1 and the second axial piece 3 can be unlocked. Specifically, the reset member 8 may be, but is not limited to, a spring, one end of the reset member 8 may be fixedly assembled, and the other end of the reset member 8 abuts against the limit block 4. The reset pieces 8 can be arranged in at least two, and at least two reset pieces 8 are arranged in parallel. Further preferably, in order to prevent the reset element 8 from being twisted, a guide rod 42 is fixed on the limiting block 4, and the reset element 8 can be sleeved on the guide rod 42.

As the preferred technical scheme of this embodiment, stopper 4 overcomes the effect of piece 8 that resets and slides under the effect of external force to the unblock. In order to facilitate the application of external force to the stopper 4, a hole may be formed in the stopper 4 to assemble a pull rope, and the stopper 4 may be pulled to slide along the slide rail 71 by pulling the pull rope.

In order to guarantee the structural integrity, the folding positioning mechanism of this embodiment is further provided with a mounting seat 9, and locking gear 2, limiting block 4, deflection structure 5, elastic component 6, sliding assembly 7 and reset component 8 are all assembled on mounting seat 9, and mounting seat 9 can be assembled at first axial component 1, and the integrity is good.

As a preferred technical solution of this embodiment, for convenience of assembly, the mounting seat 9 may be a split structure, the mounting seat 9 includes a first seat 91 and a second seat 92, the first seat 91 and the second seat 92 may be fixed to form a structure similar to a hoop structure and fixed to the outside of the first axial member 1, and an axial through hole 93 is formed between the first seat 91 and the second seat 92 for the first axial member 1 to pass through; a lateral opening 94 is formed between the edges of the first seat 91 and the second seat 92, and when assembled, the lateral opening 94 is aligned with the window 11 of the first axial member 1, so that the locking gear 2 can extend into the window 11. Specifically, the locking gear 2, the yawing structure 5 and the elastic member 6 can be assembled on the first seat 91; the stopper 4, the sliding member 7 and the restoring member 8 may be assembled on the second base 92.

As a preferred solution of this embodiment, the limiting hole 911 is formed on the first seat 91.

As a preferred solution of this embodiment, one end of the elastic member 6 is fixed on the first seat 91, and the other end acts on the hinge shaft 61. Further preferably, in order to adjust the tension of the elastic element 6, a plurality of mounting holes may be formed in the first seat 91, the mounting holes are axially distributed, the end of the elastic element 6 may be fixed to a pin, and the pin is fixed to the mounting holes at different positions, so as to adjust the tension of the elastic element 6.

As a preferred embodiment of the present invention, in order to assemble the sliding assembly 7, the outer surface of the second housing 92 is formed with a mounting groove 921 extending parallel to the axial direction, the sliding rail 71 can be fixed in the mounting groove 921, and the sliding block 72 can also slide in the mounting groove 921, thereby limiting the sliding range.

The folding positioning mechanism of the present embodiment can be used in various application scenarios, for example, as shown in fig. 15 to 16, the exercise stool includes the folding positioning structure, the fixing member 10 is horizontally supported, the rotating member 20 is hinged to one end of the fixing member 10, the other end of the fixing member 10 is fixed with the vertical bracket 60, and the vertical bracket 60 is used for supporting the exercise rope; a footrest member 70 is also secured to the mount 10. A linearly extending guide rail 30 is fixed to an upper surface of the rotary member 20, a slider 40 is slidably mounted on the guide rail 30, and a folder 50 is mounted on the slider 40. Preferably, the end of the first axial member 1 of the positioning assembly far from the second axial member 3 is hinged with the lower surface of the rotating member 20; one end of the second axial element 3 extending out of the first axial element 1 is hinged with the fixed element 10, and the hinge point of the rotating element 20 and the fixed element 10 is positioned above the junction point of the second axial element 3 and the fixed element 10.

If body building is needed, the body building stool needs to be unfolded, the rotating rotary member 20 gradually deflects to a horizontal state, the second axial member 3 in the folding positioning mechanism slides along the first axial member 1 in the forward direction, the tooth head part 31 on the second axial member 3 gradually extends between the two locking gears 2, is meshed with the locking gears 2 and drives the locking gears 2 to rotate in a single direction until the rotary member 20 is in the horizontal state, and because the locking gears 2 only rotate in a single direction, the second axial member 3 cannot be separated from the locking gears 2, and the second axial member 3 and the first axial member 1 keep a locking state; the legs 201 hingedly mounted to the lower surface of the swivel member 20 serve as a support. At this time, the user can sit on the folding seat 50 to exercise. The body-building stool has good stability and can bear the use of users with heavy weight.

After the exercise is finished, if the exercise stool needs to be stored, the pull rope can be pulled to drive the limiting block 4 to overcome the action of the reset piece 8 to move, the gear shaft 21 of the locking gear 2 abuts against the outer expanded part of the outer side wall 411 of the limiting groove 41, the locking gear 2 is far away from the teeth 311, the teeth 311 are not meshed with the locking gear 2 any more, and at the moment, the rotating piece 20 can be rotated upwards to enable the rotating piece 20 to deflect and store towards the vertical support 60; meanwhile, under the driving of the movement of the fixed member 10 and the rotating member 20, the second axial member 3 slides reversely along the first axial member 1, and the teeth 311 on the second axial member 3 are far away from the locking gear 2, so that the folding and storage can be realized.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A fold positioning mechanism comprising a folding assembly and a positioning assembly, the folding assembly comprising:

a fixing member;

the rotating part is hinged and assembled on the fixed part;

the positioning assembly comprises:

a first axial member (1);

the locking gear (2) is movably assembled on the first axial piece (1), and the locking gear (2) rotates in a single direction;

the second axial part (3) is in sliding telescopic fit with the first axial part (1), teeth (311) are formed on the second axial part (3), and the second axial part (3) is meshed with the locking gear (2) to realize stepless locking;

the limiting block (4) is assembled on the first axial piece (1) in a sliding mode, a limiting groove (41) is formed in the limiting block (4), the limiting groove (41) limits the position of the locking gear (2), the limiting block (4) slides when the locking gear is unlocked, and the limiting block (4) limits the locking gear (2) to be far away from the second axial piece (3);

one end of the positioning assembly is hinged with the fixing piece, and the other end of the positioning assembly is hinged with the rotating piece;

the two locking gears (2) are assembled on two sides of the first axial piece (1) in a deflection mode;

the locking gear (2) is assembled on a gear shaft (21), one end of the gear shaft (21) is assembled in a deflection mode, and the other end of the gear shaft (21) extends into a limiting groove (41) of the limiting block (4);

the locking gear (2) is assembled through a deflection structure (5), the deflection structure (5) is connected with an elastic part (6), and under the action of the elastic part (6), the gear shaft (21) deflects outwards and abuts against the outer side wall (411) of the limiting groove (41);

the deflection structure (5) comprises a first swinging piece (51) and a second swinging piece (52), the first swinging piece (51) is assembled in a hinged mode, a first end of the first swinging piece (51) is assembled with the locking gear (2), a second end of the first swinging piece (51) is hinged with a first end of the second swinging piece (52), and the elastic piece (6) acts on a second end of the second swinging piece (52);

the second ends of the two second swinging pieces (52) are hinged through a hinge shaft (61), the elastic piece (6) acts on the hinge shaft (61), a limiting part is formed on the hinge shaft (61), and the limiting part slides along a limiting hole (911).

2. A fold positioning mechanism according to claim 1, wherein said first axial member (1) is formed with a window (11) corresponding to said locking gear (2), said locking gear (2) being partially engaged with said second axial member (3) through said window (11).

3. The folding positioning mechanism as claimed in claim 1, wherein there are two limiting grooves (41), two limiting grooves (41) are symmetrically disposed, and the outer sidewalls (411) of the two limiting grooves (41) extend outward.

4. The folding positioning mechanism according to claim 1, further comprising a reset member (8), wherein the reset member (8) acts on the limit block (4), and under the action of the reset member (8), the limit block (4) is in an initial position, and the distance between the two locking gears (2) is minimum.

5. The folding positioning mechanism according to claim 4, further comprising a mounting seat (9), wherein the mounting seat (9) is assembled on the first axial member (1), and the locking gear (2), the limiting block (4), the deflection structure (5), the elastic member (6) and the reset member (8) are assembled on the mounting seat (9).