CN106974477A - Folding structure of chair - Google Patents

Abstract

The invention discloses a seat folding structure which comprises a seat tube, a connecting tube, a bottom tube, a first connecting seat, a second connecting seat and a locking mechanism, wherein the seat tube is pivoted with the end part of the connecting tube; one end of the bottom tube is connected with the second connecting seat, and the seat tube is rotatably arranged on the second connecting seat; the first connecting seat is arranged in a sliding manner along the central axis direction of the bottom pipe, and the locking mechanism is arranged in the first connecting seat and locks the bottom pipe and the first connecting seat, so that the connecting pipe is adjusted to realize angle adjustment or folding of the seat. The angle of the folding structure of the chair can be adjusted, the folding structure can be folded, the structure is simple, the use is convenient, and the folding structure is safe and reliable.

Description

seat folding structure

technical field

The invention relates to a seat, in particular to an angle-adjustable and foldable seat folding structure.

Background technique

The foldable child seat can be opened or folded at any time according to actual needs, so it is quite convenient to use and carry, which makes it more and more widely used. Existing child seats generally include a seat body and front and rear feet supporting the seat body. When in use, the front and rear supports are opened and locked with a locking assembly to support the seat body, and can be folded when not in use. Fold the front and rear feet together for easy portability or storage. However, the existing child seats generally lack the function of adjusting the seat angle, and some seats with this function are complex in structure and inconvenient to use.

Contents of the invention

The object of the present invention is to provide an angle-adjustable and foldable seat foldable structure with simple structure and convenient use.

In order to achieve the above object, the seat folding structure provided by the present invention includes a seat tube, a linkage tube, a bottom tube, a first connecting seat, a second connecting seat and a locking mechanism, and the end of the seat tube and the linkage tube The connecting tube is pivotally connected to the first connecting seat; one end of the bottom tube is connected to the second connecting seat, and the seat tube is rotatably arranged on the second connecting seat; The first connecting seat is slidably arranged along the central axis of the bottom tube, the locking mechanism is installed in the first connecting seat and locks the bottom tube and the first connecting seat, thereby adjusting the Linkage tube to realize seat angle adjustment or folding.

Since the present invention is provided with a seat tube, a linkage tube and a bottom tube, the linkage tube is pivotally connected to the seat tube and connected to the bottom tube through a first connecting seat, and then the bottom tube is connected through a second connection. The seat is pivotally connected to the seat tube, so that the seat tube, the linkage tube and the bottom tube form a triangular bracket structure, and the first connecting seat is used to move relative to the bottom tube, so that the seat tube can swing , to achieve the purpose of adjusting the angle or folding; and using the locking mechanism to lock the first connecting seat and the bottom tube, so that the adjustment state remains stable, ensuring the safety of use, simple structure, and easy to use.

Preferably, the seat folding structure further includes a sliding tube, and the sliding tube is slidably sleeved in the bottom tube and fixedly connected with the first connecting seat. By arranging the sliding tube, the first connecting seat can slide along the central axis direction of the bottom pipe, so as to achieve the purpose of adjusting the position of the first connecting seat.

Specifically, the locking mechanism includes a driver, a positioning seat, and an engaging pin. The bottom tube is provided with a plurality of engaging holes along the central axis, and the sliding tube is provided with a through hole for the engaging pin to pass through. , the positioning seat is fixed on the sliding tube, the driving member is movably placed in the sliding tube, the engaging pin is slidably arranged in the sliding hole of the positioning seat, and the driving member moves to drive The locking pin moves up and down the sliding hole to withdraw or insert into the locking holes of the bottom tube and the sliding tube at the same time. Since the bottom tube and the sliding tube are nested together and are provided with engaging holes and through holes, when the engaging hole of the bottom tube coincides with the through hole of the sliding tube, it can be driven by the driver. The locking pin is inserted into the locking hole and the through hole at the same time, so that the bottom tube and the sliding tube can be locked, and the structure is simple and the operation is convenient.

More specifically, a side of one end of the driving member is provided with a driving chute, and the connecting pin passes through the driving chute, the locking pin and the positioning seat. Since the driving part is arranged along the central axis of the bottom tube, and the engaging hole is perpendicular to the central axis of the bottom tube, the setting of the driving chute can make the driving part along the central axis of the bottom tube. The force in the direction of the central axis of the bottom tube is transformed into a driving force in the vertical direction, thereby effectively driving the locking pin to move.

More specifically, the locking mechanism further includes an elastic element, and the elastic element is disposed between the positioning seat and the driving member, so as to restore the driving member to its original state.

More specifically, the locking mechanism further includes an operating member, the bottom surface of the first connecting seat is provided with a mounting hole, the operating member is slidably installed in the mounting hole, and the operating member has a driving slope, so The driving member has a matching inclined surface, and the operating member is pressed to move the driving member through the driving inclined surface and the matching inclined surface. Since the operating member is operated by pressing and installed on the bottom surface of the first connecting seat, the pressing direction is perpendicular to the central axis of the bottom tube, therefore, the setting of the driving slope can make the operating member effectively The driving member is driven to move along the central axis of the bottom pipe.

Preferably, the first connecting seat is slidably sleeved on the bottom tube.

Specifically, the locking mechanism includes a first operating member and a locking member, the first connecting seat is provided with a sliding hole, and the first operating member is slidably disposed on the sliding hole along the central axis of the bottom tube. In the hole, the first operating part has a driving slope, the locking part has a matching slope, the locking part is provided with engaging teeth, and the bottom tube is provided with a plurality of first engaging holes along the direction of the central axis , the first operating member drives the engaging teeth of the locking member to engage or disengage from the first engaging hole through the driving slope and the matching slope. Since the locking part and the bottom tube are engaged through the engaging teeth and the first engaging hole, the moving direction of the engaging teeth is perpendicular to the moving direction of the first operating part, therefore, The driving slope is provided so that the first operating member can effectively drive the locking member to move along the central axis perpendicular to the bottom tube.

More specifically, the locking mechanism further includes a first elastic element, the first elastic element is arranged between the first connecting seat and the locking member, and provides the mechanism for automatically engaging the engaging teeth with the locking member. The elastic force of the first engaging hole.

Specifically, the seat folding structure further includes a second safety lock, the second safety lock is arranged on the first connecting seat, and locks the first connecting seat and the bottom tube.

More specifically, the second safety lock includes a second operating member, the second operating member is slidably disposed on the first connecting seat along a direction perpendicular to the bottom pipe, and the second operating member is set to There is a protruding post, the end of the protruding post is provided with a guiding slope, the bottom tube is provided with a second engaging hole, and the protruding post is inserted into the second engaging hole. The setting of the second safety lock can prevent the locking mechanism from being unlocked accidentally, so that the entire seat folding structure can be folded accidentally, which overcomes potential safety hazards and improves the safety of use.

Specifically, the second safety lock includes a second elastic element, and the second elastic element is arranged between the inner wall of the first connecting seat and the second operating member, and provides a mechanism for automatically inserting the boss into the second operating member. Describe the elastic force of the second engaging hole. The second elastic element can be automatically engaged in the second engaging hole, so that the first connecting seat can be prevented from slipping excessively and accidentally disengaging from the bottom tube.

Preferably, the first connecting seat is provided with a limiting elongated hole, and the linkage tube protrudes outward from a limiting column, and the limiting column is inserted into the limiting elongated hole. The cooperation between the limiting elongated hole and the limiting post can limit the range of the adjustment angle on the one hand, and on the other hand can realize the rapid positioning of the maximum and minimum angles, making the adjustment faster and more convenient.

Preferably, the seat folding structure further includes a base, on which a detachable upright is installed, and the upper end of the upright is fixedly connected with the bottom pipe.

Preferably, the bottom tube is pivotally connected to the pivot joint of the second connecting seat, and the seat folding structure further includes a positioning component, the positioning component includes a locking block, and the locking block is slidably disposed on the In the bottom tube, a locking part is provided on the pivot joint of the second connecting seat, and when unfolded, the locking block is inserted into the locking part to fix the second connecting seat. By pivotally connecting the second connecting seat to the bottom tube and using the locking block to lock or unlock it, the seat folding structure can be folded flatter and occupy less space.

Specifically, the positioning assembly further includes a reset element, the reset element is disposed in the bottom tube and provides an elastic force for inserting the locking block into the locking portion. The reset element enables the locking block to be automatically inserted into the locking portion, ensuring that the second connecting seat is effectively fixed.

Specifically, the positioning assembly further includes a connecting piece, and the connecting piece is respectively connected to the first connecting seat and the locking block, so that the first connecting seat drives the locking block to slide. By arranging the connecting piece, the locking block can be linked while operating the first connecting seat, which makes the operation easier and more convenient to use.

More specifically, the connector is a flexible connector.

Description of drawings

Fig. 1 is a structural schematic diagram of Embodiment 1 of the seat folding structure of the present invention.

Fig. 2 is a side view of Embodiment 1 of the seat folding structure of the present invention.

Fig. 3 is a schematic diagram of the locking mechanism of Embodiment 1 of the seat folding structure of the present invention.

Fig. 4 is an exploded view of the locking mechanism of Embodiment 1 of the seat folding structure of the present invention.

Fig. 5 is a cross-sectional view of the locking mechanism of Embodiment 1 of the seat folding structure of the present invention.

Fig. 6 is a cross-sectional view of the operating member of Embodiment 1 of the seat folding structure of the present invention.

Fig. 7 is a structural diagram of the first connecting seat of Embodiment 1 of the seat folding structure of the present invention.

Fig. 8 is a schematic view of Embodiment 1 of the seat folding structure of the present invention when it is fully folded.

Fig. 9 is a structural schematic diagram of Embodiment 2 of the seat folding structure of the present invention.

Fig. 10 is a side view of Embodiment 2 of the seat folding structure of the present invention.

Fig. 11 is a schematic diagram of the locking mechanism of Embodiment 2 of the seat folding structure of the present invention.

Fig. 12 is an exploded view of the locking mechanism of Embodiment 2 of the seat folding structure of the present invention.

Fig. 13 is a cross-sectional view of the locking mechanism of Embodiment 2 of the seat folding structure of the present invention.

Fig. 14 is a cross-sectional view of Embodiment 2 of the seat folding structure of the present invention when it is unlocked.

Fig. 15 is a cross-sectional view of Embodiment 2 of the seat folding structure of the present invention when it is locked.

Fig. 16 is a cross-sectional view of the second safety lock of Embodiment 2 of the seat folding structure of the present invention.

Fig. 17 is a structural schematic diagram of Embodiment 3 of the seat folding structure of the present invention.

Fig. 18 is a schematic cross-sectional view of Embodiment 3 of the seat folding structure of the present invention.

Fig. 19 is a structural view of the positioning assembly of Embodiment 3 of the seat folding structure of the present invention.

Fig. 20 is a state view of Embodiment 3 of the seat folding structure of the present invention when it is fully folded.

detailed description

In order to describe the technical content, structural features, and achieved effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

Figures 1 to 8 show Embodiment 1 of the seat folding structure of the present invention, specifically as follows:

As shown in Figure 1 and Figure 2, the seat folding structure 100 of the present invention includes a seat tube 1, a linkage tube 2, a bottom tube 3, a first connecting seat 4, a second connecting seat 5, a sliding tube 6, and a locking mechanism 7 and a base 8, the seat tube 1 is formed by butting two U-shaped tubes, and the linkage tube 2 is also U-shaped; the middle part of the seat tube 1 is pivotally connected to the two ends of the linkage tube 2; The middle part of the linkage tube 2 is rotatably socketed in the first connecting seat 4; one end of the bottom tube 3 is fixedly connected with the second connecting seat 5, and the seat tube 1 is rotatably arranged on the second connecting seat 5. The second connecting seat 5; the sliding tube 6 is slidably arranged on the bottom tube 3 and fixedly connected with the first connecting seat 4, and the sliding tube 6 enables the first connecting seat 4 to move along the The central axis of the bottom tube 3 slides to achieve the purpose of adjusting the position of the first connecting seat 4; the locking mechanism 7 is installed in the sliding tube 6, and locks the sliding tube 6 and the bottom tube 3, thereby adjusting The position of the first connecting seat 4 is to lock the angle of the linkage tube 2 relative to the seat tube 1, so as to realize seat angle adjustment or folding. A detachable column 81 is installed on the base 8 , and the upper end of the column 81 is fixedly connected with the bottom pipe 3 .

3-6, the locking mechanism 7 includes a driving member 71, a positioning seat 72, an engaging pin 73, an elastic member 74, an operating member 75 and a connecting pin 76, and the bottom pipe 3 is provided with a There are a plurality of engaging holes 31 , and the sliding tube 6 is provided with a through hole 61 through which the engaging pin 73 passes. The positioning seat 72 is fixed on the sliding tube 6, the driving member 71 is movably placed in the sliding tube 6, and the moving direction is along the central axis of the bottom tube 3, and the locking pin 73 is slidably Set in the sliding hole 72a of the positioning seat 72, the sliding hole 72a is opened along the direction perpendicular to the central axis of the bottom pipe 3; the side of one end of the driving member 71 is provided with a driving chute 71a, the The connecting pin 76 passes through the driving chute 71 a , the engaging pin 73 and the positioning seat 72 . The elastic element 74 is disposed between the positioning seat 72 and the driving member 71 to restore the driving member 71 to its original state. The driving member 71 moves to drive the locking pin 73 to move up and down the sliding hole 72a to withdraw from or insert into the locking hole 31 and the through hole 61 of the bottom tube 3 and the sliding tube 6 at the same time. Since the bottom tube 3 and the sliding tube 6 are nested with each other and each has an engaging hole 31 and a through hole 61, when the engaging holes of the bottom tube 3 and the sliding tube 6 overlap, The locking pin 73 can be driven by the driving member 71, so that the locking pin 73 can be inserted into the locking hole 31 and the through hole 61 at the same time, so that the bottom tube 3 and the sliding tube 6 can be locked. , simple structure and easy operation. Since the driving member 71 is arranged along the central axis of the bottom tube 3, and the engaging hole 31 is perpendicular to the central axis of the bottom tube 3, the setting of the driving chute 71a can make the The force of the driving member 71 along the central axis of the bottom pipe 3 is transformed into a driving force along the vertical direction, thereby effectively driving the engaging pin 73 to move. The bottom surface of the first connection base 4 is provided with a mounting hole 41, the operating member 75 is installed in the mounting hole 41 slidingly up and down, and the operating member 75 has a driving slope 75a, the driving member 71 There is a matching inclined surface 71b, the operating member 75 is pressed, and the driving member 71 is moved through the driving inclined surface 75a and the matching inclined surface 71b. Since the operating member 75 is operated by pressing and installed on the bottom surface of the first connecting seat 4, the pressing direction is perpendicular to the central axis of the bottom pipe 3, therefore, setting the driving slope 75a can make the The operating member 75 effectively drives the driving member 71 to move along the central axis of the bottom pipe 3 .

Please refer to Fig. 7 again, the first connection seat 4 is provided with a limited elongated hole 42, and the linkage tube 2 protrudes outward from a limit column 21, and the limit column 21 is inserted into the limit length. In the shaped hole 42. The cooperation between the limiting elongated hole 42 and the limiting post 21 can limit the range of the adjustment angle on the one hand, and on the other hand can realize the rapid positioning of the maximum and minimum angles, making the adjustment faster and more convenient.

Based on the above and in combination with what is shown in FIG. 2 to FIG. 8 , the working principle of the first embodiment is described in detail below, as follows:

When the seat is unfolded at the maximum angle, the sliding tube 6 is fully extended into the bottom tube 3, the angle of the seat tube 1 relative to the bottom tube 3 is the largest, and the limiting column 21 is located on the bottom tube 3. One end of the position-limiting elongated hole 42 , the locking pin 73 is inserted into the locking hole 31 and the through hole 61 where the bottom tube 3 and the sliding tube 6 overlap. When the angle needs to be adjusted or folded, the operating member 75 is pressed, and the operating member 75 drives the driving member 71 to move through the driving inclined surface 75a and the matching inclined surface 71b, and the driving member 71 moves through the driving The chute 71a and the connecting pin 76 drive the engaging pin 73 to rise along the sliding hole 72a. At this time, the engaging pin 73 withdraws from the engaging hole 31 and the through hole 61, and the bottom pipe 3 and the Unlock between the sliding tubes 6; then pull the sliding tube 6, so that the sliding tube 6 protrudes along the bottom tube 3, and in the process of the sliding tube 6 protruding out of the bottom tube 3, the The lower end of the linkage tube 2 swings with the first connecting seat 4, the limiting column 21 slides to the other end of the limiting elongated hole 42, and the seat tube 1 surrounds the second connecting seat. 5, the central axis of the sleeve swings, so that the angle of the seat tube 1 relative to the bottom tube 3 is reduced to achieve the purpose of adjusting the angle; When the through holes 61 of the sliding tube 6 are overlapped, the operating member 75 is released, and under the action of the self-recovering force of the elastic element 74, the driving member 71 returns to the original state. The pin 73 is inserted into the engaging hole 31 and the through hole 61 which overlap with each other, and is locked again in the current state. When the sliding tube 6 stretches out to the longest, the angle of the seat tube 1 relative to the bottom tube 3 is the smallest, which is in a retracted state.

Since the present invention sets the seat tube 1, the linkage tube 2 and the bottom tube 3, the linkage tube 2 is pivotally connected to the seat tube 1 and connected to the bottom tube 3 through the first connecting seat 4, and then the The bottom tube 3 is pivotally connected to the seat tube 1 through the second connecting seat 5, so that the seat tube 1, the linkage tube 2 and the bottom tube 3 form a triangular bracket structure, and the first connecting seat 4 is used to relatively The bottom tube 3 moves, so that the seat tube 1 can swing to achieve the purpose of adjusting the angle or folding; and the first connecting seat 4 is locked with the bottom tube 3 by using the locking mechanism 7, so that The adjustment state is kept stable, the safety of use is guaranteed, the structure is simple, and the use is convenient.

Figures 9 to 16 show Embodiment 2 of the seat folding structure of the present invention, specifically as follows:

Please refer to Fig. 9 to Fig. 11, the seat folding structure 200 of this embodiment has the seat tube 1, the linkage tube 2, the bottom tube 3 and the second connecting seat 5 of the first embodiment, the difference is that the bottom The tube 3 is extended along the central axis, and the first connecting seat 9 is slidably sleeved on the bottom tube 3 , and the structure of the locking mechanism 10 is also different from that of the first embodiment.

12 to 15 again, specifically, the locking mechanism 10 includes a first operating member 101, a locking member 102 and a first elastic member 103, the first connecting seat 9 is provided with a sliding hole 91, the The first operating member 101 is slidably disposed in the sliding hole 91 along the central axis of the bottom pipe 3, and the locking member 102 is built in the first connecting seat 9; the first operating member 101 has The driving inclined surface 101a, the locking member 102 has a matching inclined surface 102a, the inner side of the locking member 102 is provided with engaging teeth 102b, and the bottom tube 3 is provided with a plurality of first engaging holes 31 along the direction of the central axis. The first operating member 101 drives the engaging teeth 102 b of the locking member 102 to engage or disengage from the first engaging hole 31 through the driving slope 101 a and the matching slope 102 a. Since the locking member 102 is engaged with the bottom tube 3 through the engaging tooth 102b and the first engaging hole 31, the moving direction of the engaging tooth 102b is the same as the moving direction of the first operating member 101. are perpendicular to each other, therefore, setting the driving slope 101 a can make the first operating member 101 effectively drive the locking member 102 to move along the central axis perpendicular to the bottom tube 3 . The first elastic element 103 is disposed between the first connecting base 9 and the locking member 102 , and provides an elastic force for the engaging tooth 102 b to automatically engage with the first engaging hole 31 .

As shown in Figure 16 again, the seat folding structure 200 also includes a second safety lock 201, the second safety lock 201 is arranged on the first connecting seat 9, and is connected to the first connecting seat 9. And the bottom pipe 3 is locked. The second safety lock 201 includes a second operating member 2011 and a second elastic member 2012, the second operating member 2011 is slidably disposed on the first connecting seat 9 along a direction perpendicular to the bottom tube 3, and The second operating member 2011 is provided with a boss 2011a, and the end of the boss 2011a is provided with a guide slope 2011b, and the bottom tube 3 is provided with a second engaging hole 32, when the seat is at the minimum angle, The protrusion 2011 a is inserted into the second engaging hole 32 . The second elastic element 2012 is disposed between the inner wall of the first connecting base 9 and the second operating member 2011 , and provides an elastic force for automatically inserting the protrusion 2011 a into the second engaging hole 32 . The second elastic element 2012 can be automatically engaged in the second engaging hole 32 . When the seat needs to be folded, the second safety lock 201 and the first operating member 101 must be operated, which can prevent the locking mechanism 10 from being unlocked accidentally, thereby preventing the entire seat folding structure 200 from being folded accidentally. The potential safety hazard is overcome, and the safety of use is improved. When it is necessary to increase the seat angle, it is only necessary to operate the first operating member 101 , because the end of the boss 2011 a is automatically disengaged from the second engaging hole 32 due to the use of the guide slope 2011 b.

With reference to Fig. 14 and Fig. 15, the working principle of the second embodiment will be described in detail below, as follows:

When the locking mechanism 10 and the second safety lock are in the locked state 201, the seat is at the smallest angle, and when folded, the second operating member 2011 is pushed to make the boss 2011a withdraw from the seat. the second engaging hole 32, and operate the first operating member 101 at the same time, so that the first operating member 101 slides in the sliding hole 91. At this time, the first operating member 101 passes through the driving slope 101a and The matching inclined surface 102a drives the locking member 102 to move, and the locking teeth 102b of the locking member 102 disengage from the first engaging hole 31 , at this time, the first connecting seat 9 and the bottom pipe 3 are unlocked , at this time, push the first connecting seat 9 to make it slide on the bottom pipe 3, the position of the first connecting seat 9 on the bottom pipe 3 can be adjusted, thereby driving the linkage pipe 2 swings, when the first connecting seat 9 slides to the end of the bottom tube 3, the seat tube 1 and the bottom tube 3 are completely close together to realize the folding of the seat.

When the locking mechanism 10 and the second safety lock 201 are in the locked state and the seat angle needs to be increased, only the first operating member 101 needs to be operated so that the first operating member 101 is in the sliding hole 91 slide, at this time, the first connecting seat 9 and the bottom pipe 3 are unlocked, at this time, the first connecting seat 9 is pushed to slide on the bottom pipe 3, and the first connecting seat 9 When sliding, due to the action of the guide slope 2011b, the end of the boss 2011a is automatically disengaged from the second engaging hole 32, so that the second safety lock 201 is automatically unlocked, and then the first safety lock 201 is adjusted. The position of the connecting seat 9 on the bottom tube 3 drives the linkage tube 2 to swing, and the seat tube 1 is far away from the bottom tube 3, so as to increase the seat angle. When it is adjusted to a proper state and the engaging tooth 102b of the locking member 102 is facing the first engaging hole 31, the first operating member 101 is released, and at this time, the first elastic member 103 Under the action of the self-recovering force, the engaging tooth 102b of the locking member 102 engages with the first engaging hole 31 again, and is locked in the current state; at the same time, the limiting column 21 slides to the limiting At one end of the elongated hole 42, at this moment, the angle of the seat tube 1 relative to the bottom tube 3 is the largest.

As shown in FIGS. 17-20 , the drawings show the structure of Embodiment 3 of the seat folding structure of the present invention.

The seat folding structure 300 of this embodiment adds a positioning assembly 310 for fixing the second connecting seat on the basis of the first embodiment, specifically, the pivot between the bottom tube 3 and the second connecting seat 5 The connecting part 51 is pivotally connected. The positioning assembly 310 includes a locking block 311, a reset element 312 and a connecting piece 313. The locking block 311 is slidably arranged in the bottom tube 3. The pivoting connection of the second connecting seat 5 The portion 51 is provided with a locking portion 511 , and when the seat folding structure 300 is unfolded, the locking block 311 is inserted into the locking portion 511 to fix the second connecting seat 5 . The reset element 312 is disposed in the bottom tube 3 and provides an elastic force for the locking block 311 to be inserted into the locking portion 511, and the reset element 312 enables the locking block 311 to be automatically inserted into the locking portion 511 , to ensure that the second connecting seat 5 is effectively fixed. Both ends of the connector 313 are respectively connected to the end of the sliding tube 6 close to the second connecting seat 5 and the locking block 311, so that the end of the sliding tube 6 drives the locking block 311 sliding; of course, since the sliding tube 6 and the first connecting seat 4 are fixed, the connecting piece 313 can also be connected to the first connecting seat 4, and the effect is the same. The connector 313 is a flexible connector, and the connector 313 in this embodiment is made of steel wire. In addition, the length of the connecting piece 313 also needs to be reasonably set, and its length should be the smallest at the angle between the seat tube 1 and the bottom tube 3 (that is, the seat tube 1 and the linkage tube 2 are completely flat ), it is advisable that the sliding tube 6 just tightens the connecting piece 313 so that the locking block 311 just disengages from the locking portion 511 . In this way, when the angle of the seat tube 1 is adjusted, the locking state of the second connecting seat 5 will not be affected, and when the seat tube 1 is folded, the second connecting seat 5 can be linked and released. Lock. By pivotally connecting the second connecting seat 5 to the bottom tube 3 and using the locking block 311 to lock or unlock it, the seat folding structure 300 can be folded flatter and occupy less space. smaller. In addition, by setting the connecting piece 313, the locking block 311 can be pulled at the same time when the first connecting seat 4 is operated to completely turn the seat tube 1 flat, so that the locking block 311 overcomes the The elastic force of the reset element 312 leaves the locking part 511, so that the second connecting seat 5 is released, and then the second connecting seat 5 is rotated and folded downward, so that the seat of the present invention is folded. The structure 300 is simpler to operate and more convenient to use.

In this embodiment, the positioning component 310 can also be added on the basis of the second embodiment, only the connecting piece 313 needs to be connected to the first connecting seat 4, and the first connecting seat 4 is driven by sliding to It only needs to tighten the connecting piece 313 to drive the locking block 311 away from the locking portion 511 , and the description will not be repeated here. The above disclosures are only preferred examples of the present invention, and of course cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the patent scope of the present invention still fall within the scope of the present invention.

Claims (18)

1. a kind of seat folding structure, it is characterised in that：Including seat pipe, interlock pipe, bottom pipe, the first connecting seat, the second connecting seat And locking mechanism, the seat pipe with it is described gearing pipe end be pivotally connected, it is described gearing pipe be rotatably arranged in it is described first connection Seat；One end of the bottom pipe is connected with second connecting seat, and the seat pipe is rotatably arranged in second connecting seat；It is described Central axis direction of first connecting seat along the bottom pipe is slidably set, and the locking mechanism is installed in first connecting seat And bottom pipe and the first connecting seat are locked, thereby adjust described interlock and manage, to realize chair angle adjustment or folding.

2. seat folding structure as claimed in claim 1, it is characterised in that：The seat folding structure also includes sliding tube, The sliding tube is slidably socketed in the bottom pipe and is fixedly connected with first connecting seat.

3. seat folding structure as claimed in claim 2, it is characterised in that：The locking mechanism includes actuator, positioning seat And engagement pin, the bottom pipe offers multiple connecting holes along central axis direction, and the sliding tube is passed through provided with one for engagement pin Through hole, the positioning seat is fixed on the sliding tube, and the actuator is movably placed in the sliding tube, the engagement pin In the sliding eye for being slidingly arranged at the positioning seat, the actuator moves and then drives the engagement pin in the sliding eye Move up and down with while exiting or inserting in the connecting hole of the bottom pipe and sliding tube.

4. seat folding structure as claimed in claim 3, it is characterised in that：The side of one end of the actuator is provided with driving Skewed slot, connecting pin is arranged in the driving skewed slot, engagement pin and positioning seat.

5. seat folding structure as claimed in claim 3, it is characterised in that：The locking mechanism also includes flexible member, institute State flexible member to be arranged between the positioning seat and the actuator, so that the actuator is returned to reset condition.

6. seat folding structure as claimed in claim 3, it is characterised in that：The locking mechanism also includes operating parts, described The bottom surface of first connecting seat is provided with mounting hole, and the operating parts is slidably mounted in the mounting hole, and the operating parts has There is driving inclined-plane, the actuator, which has, coordinates inclined-plane, presses the operating parts, made by the driving inclined-plane and cooperation inclined-plane The actuator movement.

7. seat folding structure as claimed in claim 1, it is characterised in that：First connecting seat is slidably socketed on described On the pipe of bottom.

8. seat folding structure as claimed in claim 7, it is characterised in that：The locking mechanism includes the first operating parts and lock Determine part, first connecting seat is provided with sliding eye, and central axis direction of first operating parts along the bottom pipe is slidably set It is placed in the sliding eye, first operating parts has driving inclined-plane, the locking piece, which has, coordinates inclined-plane, the locking piece Interior be provided with engaging tooth, the bottom pipe is provided with multiple first connecting holes along central axis direction, and first operating parts passes through described Driving inclined-plane and cooperation inclined-plane drive the engaging tooth occlusion of the locking piece or depart from first connecting hole.

9. seat folding structure as claimed in claim 8, it is characterised in that：The locking mechanism also includes the first elasticity member Part, first flexible member is arranged between first connecting seat and the locking piece, and offer makes the engaging tooth certainly The dynamic elastic force for being snapped at first connecting hole.

10. seat folding structure as claimed in claim 7, it is characterised in that：The seat folding structure also includes the second peace Quan Suo, the second safety lock is arranged on first connecting seat, and first connecting seat and the bottom pipe are locked.

11. seat folding structure as claimed in claim 10, it is characterised in that：The second safety lock includes the second operation Part, the second operating parts edge is slidingly arranged at first connecting seat, and described second perpendicular to the direction of the bottom pipe Operating parts is provided with projection, and the end of the projection is provided with guiding surface, and the bottom pipe is provided with second connecting hole, the projection It is inserted in second connecting hole.

12. seat folding structure as claimed in claim 7, it is characterised in that：The second safety lock includes the second elasticity member Part, second flexible member is arranged between the first connecting seat inwall and second operating parts, and provide make it is described Projection is automatically inserted into the elastic force of second connecting hole.

13. the seat folding structure as described in claim 1-12, it is characterised in that：It is long that first connecting seat opens up limited location Shape hole, the gearing pipe outwards stretches out limited post, and the limited post is inserted in the spacing elongated hole.

14. seat folding structure as claimed in claim 1, it is characterised in that：The seat folding structure also includes base, institute The column that is provided with and can dismantle on base is stated, the upper end of the column is fixedly connected with the bottom pipe.

15. seat folding structure as claimed in claim 1, it is characterised in that：The pivot of the bottom pipe and second connecting seat Socket part is pivotally connected, and the seat folding structure also includes positioning component, and the positioning component includes clamping block, and the clamping block is slided Ground is arranged in the bottom pipe, and the articulated section of second connecting seat offers sticking department, during expansion, and the clamping block is inserted in The sticking department is with fixed second connecting seat.

16. seat folding structure as claimed in claim 15, it is characterised in that：The positioning component also includes reset element, The reset element is arranged in the bottom pipe and provides an elastic force for making the clamping block insert the sticking department.

17. seat folding structure as claimed in claim 15, it is characterised in that：The positioning component also includes connector, institute State connector and be connected to first connecting seat and the clamping block, so that first connecting seat drives the clamping block Slide.

18. seat folding structure as claimed in claim 17, it is characterised in that：The connector is flexible connecting member.