Training chair with locking function

Abstract

A training chair with a locking function comprises a front supporting leg, a rear supporting leg and a chair seat, and the front supporting leg comprises a front seat rod and front chair legs fixedly arranged at the left end and the right end of the front seat rod respectively; the rear supporting legs comprise a rear seat rod and rear chair legs which are fixedly arranged at the left end and the right end of the rear seat rod respectively, and the rear chair legs and the front chair legs which are located on the same side of the training chair are rotationally connected; the chair seat comprises a seat shell, the bottom of the seat shell is rotationally connected to the rear seat rod and located between the two rear chair legs, and the bottom of the seat shell is provided with a matching groove allowing the front seat rod to be inserted after the chair seat is unfolded; the seat shell is provided with an unfolding lock catch mechanism which is used for limiting the front seat rod in the matching groove so as to lock the seat in an unfolding state, the unfolding lock catch mechanism comprises an unfolding lock catch which is arranged on the seat shell in a guiding manner, and the unfolding lock catch is configured to slide to the matching groove so as to limit the front seat rod in the matching groove; therefore, the training chair is stably kept in an unfolded state, and the use experience of a user is further ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to training chair technical field, concretely relates to a training chair with lock catch function. BACKGROUND

[0002] In order to conveniently store, the training chair on the market currently usually has folding function. For example, the technical scheme disclosed by CN202321273355.9 discloses a foldable training chair, which comprises a chair frame and a chair cushion. The chair frame comprises mutually symmetrical supports. The supports comprise support one and support two which are cross-rotationally connected. A rotating shaft rod is fixedly connected between the symmetrical supports. The rotating shaft rod is sleeved with the chair cushion. The chair cushion is rotationally connected with the rotating shaft rod. A horizontal rod is fixedly connected between the symmetrical supports. A groove is formed in the bottom of the chair cushion and is matched with the horizontal rod. When the chair cushion is rotated to the horizontal position, the horizontal rod can be matched with the groove. At this time, the support one and the support two cannot be relatively rotated, thereby locking the supports and keeping the training chair in the unfolded state, which is convenient for users to sit.

[0003] However, in the folding and unfolding process of the training chair provided by the technical scheme, the horizontal rod will rub against the groove. The continuous physical contact causes the matching part of the horizontal rod and the groove to be gradually worn. When the wear accumulates to a certain extent, the groove will not be able to effectively lock the horizontal rod, thereby affecting the stability of the unfolded training chair. UTILITY MODEL CONTENT

[0004] In order to overcome the shortcomings of the prior art, the utility model provides a training chair with lock catch function.

[0005] The utility model solves the technical problems by adopting the following technical scheme:

[0006] A training chair with lock catch function, which comprises a front support leg, a rear support leg and a seat. The front support leg comprises a front seat rod and front chair legs fixed on the left and right ends of the front seat rod. The rear support leg comprises a rear seat rod and rear chair legs fixed on the left and right ends of the rear seat rod. The rear chair legs and the front chair legs on the same side of the training chair are rotationally connected. The seat comprises a seat shell. The bottom of the seat shell is rotationally connected to the rear seat rod and located between the two rear chair legs. The bottom of the seat shell is provided with a matching groove for inserting the front seat rod when the seat is unfolded. The seat shell is provided with an unfolding lock catch mechanism for limiting the front seat rod in the matching groove to lock the seat in the unfolded state. The unfolding lock catch mechanism comprises an unfolding lock catch mounted on the seat shell. The unfolding lock catch is configured to be able to slide into the matching groove to limit the front seat rod in the matching groove.

[0007] In the utility model, the bottom of the seat shell is equipped with unfolding sliding guide groove which is communicated with the matching groove, and the unfolding lock catch is slidably installed in the unfolding sliding guide groove.

[0008] In the utility model, the unfolding lock catch mechanism further comprises unfolding spring which is used for driving the unfolding lock catch to slide to the matching groove by elasticity, and two ends of the unfolding spring are respectively connected with the seat shell and the unfolding lock catch.

[0009] In the utility model, the upper portion of the seat shell is provided with seat installation groove, the unfolding sliding guide groove is equipped with inner guide long hole which is communicated with the seat installation groove, the unfolding lock catch is equipped with locking guide block which is guidedly matched with the inner guide long hole, and the locking guide block is equipped with sliding limiting block which is used for limiting the unfolding lock catch from falling downward.

[0010] In the utility model, the unfolding sliding guide groove is equipped with inner avoiding long hole which is communicated with the seat installation groove, the unfolding lock catch is equipped with sliding extension which extends into the unfolding sliding guide groove from the inner avoiding long hole, the seat installation groove is equipped with seat extension, and two ends of the unfolding spring are respectively connected with the sliding extension and the seat extension.

[0011] In the utility model, the other end of the unfolding lock catch is equipped with upper locking driving surface which is forced to slide forward and leave the matching groove by the front seat rod in the process of chair seat overturning and unfolding.

[0012] In the utility model, the unfolding lock catch is equipped with control handle which is used for controlling the unfolding lock catch to slide.

[0013] In the utility model, the training chair further comprises chair back, the chair back frame is jointly installed on the two front chair legs, the height lock seat is arranged on the chair back frame, the lifting slide is guidedly installed on the height lock seat and can slide up and down, and the chair back seat of the chair back is installed on the front end of the lifting slide.

[0014] In the utility model, the height lock seat is equipped with lifting guide hole, the lifting slide is slidably matched in the lifting guide hole, a plurality of height clamping grooves are arranged on the vertical hole wall of the lifting guide hole from top to bottom, and the lifting slide is equipped with hinged long hole.

[0015] In the utility model, the bottom of height locking piece is equipped with unlocking holding groove, the bottom of locking installation groove is equipped with unlocking holding part that can insert unlocking holding groove in the process of chair back reset, the other vertical hole wall of lifting guide hole is equipped with first limit part and second limit part, the other side of height locking piece lower extreme is equipped with linkage convex part for matching first limit part and second limit part.

[0016] The utility model discloses the beneficial effect has: the utility model discloses the unfolding lock catch mechanism is installed on the seat shell, and the unfolding lock catch mechanism includes the unfolding lock catch of guide installation on the seat shell, the unfolding lock catch is configured as the matching recess groove of slidable to limit the front seat rod in the matching recess groove to make the training chair steady and keep the unfolded state, has simple structure, stable advantage, effectively avoids the drawback of traditional utilization joint mode and keeps the unfolded state of training chair, and further guarantees the use experience of user. In addition, the back of training chair can be lifted and adjusted, can adapt to different use demand of user, thereby further improve the use experience of user. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further explained in connection with the drawings and implementation:

[0018] Figure 1 For the three-dimensional of training chair Figure 1 ;

[0019] Figure 2 For the three-dimensional of training chair Figure 2 ;

[0020] Figure 3 It is combined schematic view of unfolding lock catch mechanism and seat shell;

[0021] Figure 4 It is combined sectional view of unfolding lock catch mechanism and seat shell;

[0022] Figure 5 It is exploded schematic view of unfolding lock catch mechanism and seat shell;

[0023] Figure 6 It is exploded schematic view of unfolding lock catch mechanism and folding holding mechanism;

[0024] Figure 7 It is exploded schematic view of chair back and chair back frame;

[0025] Figure 8 It is exploded schematic view of chair back and height locking mechanism;

[0026] Figure 9 It is installation schematic view of height locking mechanism. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment.

[0028] Referring to Figures 1-9 A training chair with a locking function, comprising a front support leg, a rear support leg and a seat, the front support leg comprises a front seat rod 11 and front chair legs 12 respectively fixed on the left and right ends of the front seat rod 11 by welding; the rear support leg comprises a rear seat rod 21 and rear chair legs 22 respectively fixed on the left and right ends of the rear seat rod 21 by welding, the rear chair legs 22 and the front chair legs 12 on the same side of the training chair are connected by a hinge device, the front support leg and the rear support leg can be folded and unfolded relative to each other; specifically, the hinge device comprises a hinge seat 13 installed on the front chair leg 12 by bolt connection and a hinge shaft arranged on the hinge seat 13, the hinge seat 13 is provided with a support leg hinge groove, the middle part of the hinge shaft is located in the support leg hinge groove, the upper end of the rear chair leg 12 extends into the support leg hinge groove and is connected with the hinge shaft, so that the rear chair leg 22 and the front chair leg 12 on the same side of the training chair are connected together. In addition, the support leg hinge groove is provided with an unfolding limiting part and a folding limiting part, when the upper end of the rear chair leg 12 abuts against the unfolding limiting part, the training chair cannot continue to unfold, thereby ensuring the stability of the unfolded training chair; when the upper end of the rear chair leg 12 abuts against the folding limiting part, the training chair cannot continue to fold.

[0029] Further, the seat comprises a seat shell 31 and a seat cushion 32 arranged on the upper part of the seat shell 31, the bottom of the seat shell 31 is rotatably connected to the rear seat rod 21 and located between the two rear chair legs 22, the seat is arranged to be folded and unfolded with the rear seat rod 21 as the rotation center; the bottom of the seat shell 31 is provided with a matching groove 33 for inserting the front seat rod 11 after the seat is unfolded. The seat shell 31 is provided with an unfolding lock mechanism for limiting the front seat rod 11 in the matching groove 33 to lock the seat in the unfolded state, the unfolding lock mechanism comprises an unfolding lock 41 mounted on the seat shell 31 in a guide manner, the unfolding lock 41 is provided with a control handle 411 for controlling the sliding of the unfolding lock 41, the unfolding lock 41 is arranged to be slid to the matching groove 33 to limit the front seat rod 11 in the matching groove 33, so that the training chair is stably kept in the unfolded state.

[0030] In this embodiment, the bottom of the seat shell 31 is provided with an unfolding sliding guide groove 34 communicating with the matching groove 33, and the unfolding lock 41 is slidably and guideedly mounted in the unfolding sliding guide groove 34, so that the unfolding lock 41 can smoothly slide to the matching groove 33.

[0031] In the embodiment, the unfolding lock mechanism further comprises an unfolding spring 42 for driving the unfolding lock 41 to slide into the matching groove 33 by elasticity, two ends of the unfolding spring 42 are connected with the seat shell 31 and the unfolding lock 41 respectively.

[0032] In the embodiment, the seat cushion 32 comprises a seat plate and a soft pad arranged on the upper part of the seat plate, the upper part of the seat shell 31 is provided with a seat installation groove 35 with an upper opening, the seat plate of the seat cushion 32 is installed on the upper part of the seat shell 31 by bolt connection and covers the seat installation groove 35. Further, the unfolding sliding guide groove 34 is provided with an inner guide long hole 36 communicating with the seat installation groove 35, the unfolding lock 41 is provided with a locking guide block 412 guiding and matching with the inner guide long hole 36, the locking guide block 412 is a long circular hole, the locking guide block 412 can further improve the quality of the forward and backward movement of the unfolding lock 41, the locking guide block 412 is provided with a sliding limiting block 43 sliding and matching with the groove surface of the seat installation groove 35, the sliding limiting block 43 is used for limiting the downward falling of the unfolding lock 41, the sliding limiting block 43 and the locking guide block 412 are combined and connected by bolt connection.

[0033] In the embodiment, the unfolding sliding guide groove 34 is provided with an inner avoiding long hole communicating with the seat installation groove 35, the unfolding lock 41 is provided with a sliding extension 413 extending into the unfolding sliding guide groove 34 from the inner avoiding long hole, the seat installation groove 35 is provided with a seat extension 351, two ends of the unfolding spring 42 are connected with the sliding extension 413 and the seat extension 351 respectively, the unfolding spring 42 is preferably a tension spring.

[0034] In the embodiment, the other end of the unfolding lock 41 is provided with a locking driving surface 414 forcing the unfolding lock 41 to slide forward and leave the matching groove 33 during the unfolding process of the chair seat, the locking driving surface 414 is a locking driving inclined surface arranged upward and backward or a locking driving arc surface extending upward and backward in an arc shape, preferably the locking driving arc surface; during the unfolding process of the chair seat, the locking driving surface 414 of the unfolding lock 41 first presses on the front seat rod 11, the unfolding lock 41 slides forward under force and leaves the matching groove 33 and compresses the unfolding spring 42; when the chair seat continues to unfold until the front seat rod 11 is inserted into the matching groove 33, the unfolding spring 42 unfolds backward and drives the unfolding lock 41 to slide backward to the matching groove 33, so as to limit the front seat rod 11 in the matching groove 33 and cannot be taken out, ensuring the structural stability of the training chair in the unfolded state; moreover, the design of the locking driving surface 414 enables the user to not manually pull the unfolding lock 41 to make the front seat rod 11 enter the matching groove 33 during the unfolding process, which facilitates the user to unfold and use the training chair.

[0035] In the embodiment, a plurality of unfolding protrusions 415 are arranged on the other end of the unfolding lock 41 from left to right, and the upper lock driving surface 414 is arranged on the unfolding protrusions 415. The unfolding protrusions 415 can avoid direct contact between the front seat rod 11 and the unfolding lock 41, reduce friction, and facilitate the front seat rod 11 to quickly enter the matching groove 33.

[0036] In the embodiment, the bottom of the unfolding lock 41 is provided with an extension avoiding groove 416 corresponding to the position of the control handle 411. The extension avoiding groove 416 is located between the control handle 411 and the upper lock driving surface 414. The extension avoiding groove 416 can enable the user's hand to better hook on the control handle 411, so as to manually pull the unfolding lock 41 to slide forward and away.

[0037] As a preferred embodiment, the bottom of the seat shell 31 is provided with a rotating groove 36, and the rear seat rod 21 is partially rotatably matched in the rotating groove 36. The seat shell 31 is further provided with a seat rod limiting groove 37 corresponding to the rotating groove 36. The seat rod limiting groove 37 is provided with a bottom shell limiting seat 51 for limiting the rear seat rod 21 in the rotating groove 36. The rear seat rod 21 is provided with a folding lock hole 211 arranged on a lock seat fixed on the rear seat rod 21 by bolts. The bottom shell limiting seat 51 is provided with a folding lock guiding hole, and the folding lock guiding hole is provided with a folding retaining mechanism capable of limiting and retaining the chair seat in a folded state. The folding retaining mechanism includes a folding lock block 52 for inserting into the folding lock hole 211 to limit the chair seat from being turned over, and a folding lock spring 53 for driving the folding lock block 52 to move towards the rear seat rod 21 by elasticity. The folding lock block 52 is configured to rotate around the rear seat rod 21 as the chair seat is turned over. When the folding lock block 52 is opposite to the folding lock hole 211, the folding lock block 52 is clamped into the folding lock hole 211 under the elastic action of the folding lock spring 53, so as to limit the chair seat from being turned over and unfolded after being folded, and ensure the stability of the training chair when being folded and stored. The folding lock block 52 has a guide inclined surface for pressing the wall surface of the folding lock hole 211 during unfolding of the chair seat, so as to promote the insertion part of the folding lock block 52 to exit the folding lock hole 211.

[0038] As a preferred embodiment, the training chair further comprises a chair back 6, which comprises a chair back seat and a mesh cloth fixed to the front side of the chair back seat; a chair back frame 61 is mounted on the two front chair legs 12, and a height lock seat 62 is arranged on the chair back frame 61; a lifting slide 63 is guided and mounted on the height lock seat 62 in a lifting and sliding manner, and the chair back 6 is mounted on the front end of the lifting slide 63; and a height locking mechanism is mounted on the lifting slide 63 to limit the height of the lifting slide 63 on the height lock seat 62. The combination of the lifting slide 63 and the height locking mechanism enables the training chair to have a height adjustment function of the chair back 6, thereby meeting different use requirements of the user for the chair back 6.

[0039] In the embodiment, two lifting guide holes 621 arranged from left to right are arranged on the height lock seat 62, the lifting guide holes 621 are long circular holes penetrating through the height lock seat 62 from front to back, the length direction of the lifting guide holes 621 extends from top to bottom, and each lifting guide hole 621 corresponds to one lifting slide 63; the lifting slide 63 is slidingly fitted in the lifting guide hole 621, the rear end of the lifting slide 63 is provided with a lifting limiting slide 631 for limiting the forward movement of the lifting slide 63, and the front end of the lifting slide 63 extends out of the lifting guide hole 621 and is connected to the chair back 6 in a bolt connection manner.

[0040] Further, a plurality of height clamping grooves 622 arranged from top to bottom are arranged on a vertical hole wall of the lifting guide hole 621, the lifting slide 63 is provided with a locking mounting groove 632 and a hinged long hole 633 located on the front and rear sides of the locking mounting groove 632, the hinged long hole 633 is a long circular hole, the length direction of the hinged long hole 633 is parallel to the lifting direction of the chair back 6; the height locking mechanism is located in the locking mounting groove 632, and the height locking mechanism comprises a height locking shaft 64, a height locking piece 65 and a height locking spring 66, both ends of the height locking shaft 64 are fitted and mounted in the two hinged long holes 633 respectively, the height locking shaft 64 can move up and down along the length direction of the hinged long hole 633, a limiting plug 67 is arranged in the hinged long hole 633, and the height locking shaft 64 is located between the limiting plugs 67 of the two hinged long holes 633, so that the height locking shaft 64 cannot move forward and backward out of the hinged long hole 633; the upper end of the height locking piece 65 is connected to the height locking shaft 64, the lower end of the height locking piece 65 can rotate and swing around the height locking shaft 64 as the rotation center, one side of the lower end of the height locking piece 65 is provided with a height locking portion 651 for clamping into the height clamping groove 622 to lock the height of the chair back 6, and the cross-sectional shape of the height clamping groove 622 and the height locking portion 651 is a trapezoidal shape; one end of the height locking spring 66 is mounted in a spring groove of the height locking piece 65, and the other end is fitted on the groove wall of the locking mounting groove 632, and the height locking spring 66 is used to drive the lower end of the height locking piece 65 to rotate towards the height clamping groove 622 around the height locking shaft 64 as the rotation center.

[0041] Further, the bottom of the height locking piece 65 is provided with an unlocking retaining groove 655, and the bottom of the locking mounting groove 632 is provided with an unlocking retaining portion 634 capable of being inserted into the unlocking retaining groove 655 during the resetting of the chair back 6; the other vertical hole wall of the lifting guide hole 621 is provided with a first limiting portion 623 and a second limiting portion 624 arranged from top to bottom, and the other side of the lower end of the height locking piece 65 is provided with a linkage protrusion 656 for limiting the upward movement of the height locking piece 65 by cooperating with the first limiting portion 623 during the upward movement of the chair back 6 and limiting the downward movement of the height locking piece 65 by cooperating with the second limiting portion 624 during the downward movement of the chair back 6.

[0042] When the height of the chair back 6 is adjusted, the chair back 6 is pulled to move upward, and the chair back 6 linkage lifting slide 63 and the height locking piece 65 are synchronously moved upward, during which the lower end of the height locking piece 65 continuously swings around the height locking shaft 64 to make the height locking portion 651 cooperate with different height clamping grooves 622, when the height locking portion 651 cooperates with the height clamping groove 622 and the chair back 6 is no longer pulled, the height of the chair back 6 is locked and cannot be reset downward.

[0043] When it is needed to reset to the lowest gear, the chair back 6 is continuously pulled to move upward, when the height locking portion 651 of the height locking piece 65 rises beyond the highest height clamping groove 622, the lower end of the height locking piece 65 rotates around the height locking shaft 64 to approach the other vertical hole wall of the lifting guide hole 621, and the linkage protrusion 656 is inserted between the first limiting portion 623 and the second limiting portion 624, until the linkage protrusion 656 abuts against the first limiting portion 623, the height locking piece 65 is limited to continue to move upward, at this time, the chair back 6 and the lifting slide 63 continue to move upward, while the height locking piece 65 and the height locking shaft 64 remain unchanged, when the unlocking retaining portion 634 is inserted into the unlocking retaining groove 655, the chair back 6 and the lifting slide 63 are moved to the highest point, while the height locking spring 66 is compressed, the lower end of the height locking piece 65 is limited by the cooperation between the unlocking retaining portion 634 and the unlocking retaining groove 655, so as to not rotate to approach the vertical hole wall of the lifting guide hole 621; the chair back 6, the lifting slide 63 and the height locking piece 65 can be synchronously moved downward, until the linkage protrusion 656 abuts against the second limiting portion 624, the height locking piece 65 is limited to continue to move downward, at this time, the chair back 6 and the lifting slide 63 continue to move downward, while the height locking piece 65 and the height locking shaft 64 remain unchanged, when the unlocking retaining portion 634 is separated from the unlocking retaining groove 655, the chair back 6 and the lifting slide 63 are moved to the lowest point, while the height locking spring 66 is expanded to drive the lower end of the height locking piece 65 to rotate to approach the vertical hole wall of the lifting guide hole 621, so as to facilitate the user to continue to adjust the height of the chair back 6.

[0044] The above merely describes preferred embodiments of the present application, and any technical solutions with substantially the same principles as those of the present application should fall within the protection scope of the present application.

Claims

1. A training chair with a locking function, comprising a front leg, a rear leg and a seat, the front leg comprising a front seat rod (11) and front chair legs (12) respectively fixed at the left and right ends of the front seat rod (11); the rear leg comprising a rear seat rod (21) and rear chair legs (22) respectively fixed at the left and right ends of the rear seat rod (21), the rear chair legs (22) and the front chair legs (12) on the same side of the training chair being rotationally connected; the seat comprising a seat shell (31), the bottom of the seat shell (31) being rotationally connected to the rear seat rod (21) and located between the two rear chair legs (22), the bottom of the seat shell (31) being provided with a matching groove (33) for inserting the front seat rod (11) after the seat is unfolded; characterized in that: The seat shell (31) is provided with a deployment locking mechanism for locking the front seat rod (11) in the matching groove (33) to lock the chair in the unfolded state, the deployment locking mechanism comprises a deployment lock (41) mounted on the seat shell (31) in a guided manner, and the deployment lock (41) is configured to be slidable into the matching groove (33) to restrict the front seat rod (11) in the matching groove (33).

2. The training chair with a locking function according to claim 1, characterized in that: The bottom of the seat shell (31) is provided with a deployment sliding guide groove (34) in communication with the matching groove (33), and the deployment lock (41) is slidably guided and mounted in the deployment sliding guide groove (34).

3. The training chair with a locking function according to claim 2, characterized in that: The deployment locking mechanism further comprises a deployment spring (42) for sliding the deployment lock (41) into the matching groove (33) by using elasticity, and the two ends of the deployment spring (42) are connected with the seat shell (31) and the deployment lock (41) respectively.

4. The training chair with a locking function according to claim 3, characterized in that: The upper part of the seat shell (31) is provided with a seat mounting groove (35), the deployment sliding guide groove (34) is provided with an inner guide long hole (36) in communication with the seat mounting groove (35), the deployment lock (41) is provided with a locking guide block (412) guided and matched with the inner guide long hole (36), and the locking guide block (412) is provided with a sliding limiting block (43) slidably matched with the seat mounting groove (35).

5. The training chair with a locking function according to claim 4, characterized in that: The deployment sliding guide groove (34) is provided with an inner avoidance long hole in communication with the seat mounting groove (35), the deployment lock (41) is provided with a sliding extension (413) extending into the deployment sliding guide groove (34) from the inner avoidance long hole, the seat mounting groove (35) is provided with a seat extension (351), and the two ends of the deployment spring (42) are connected with the sliding extension (413) and the seat extension (351) respectively.

6. The training chair with a locking function according to any one of claims 1-5, characterized in that: The other end of the deployment lock (41) is provided with a locking driving surface (414) forced by the front seat rod (11) to slide forward and away from the matching groove (33) during the unfolding of the chair back.

7. The training chair with a locking function according to any one of claims 1-5, characterized in that: The deployment lock (41) is provided with a control handle (411) for controlling the sliding of the deployment lock (41).

8. The training chair with a locking function according to any one of claims 1-5, characterized in that: The training chair further comprises a chair back (6), a chair back frame (61) is mounted on the two front chair legs (12) in a common manner, the chair back frame (61) is provided with a height lock seat (62), a lifting slide (63) is guided and mounted on the height lock seat (62) in a lifting and sliding manner, and a chair back seat of the chair back (6) is mounted on the front end of the lifting slide (63); and the lifting slide (63) is provided with a height locking mechanism for limiting the height of the lifting slide (63) on the height lock seat (62).

9. The training chair with a locking function according to claim 8, characterized in that: The height locking seat (62) is provided with a lifting guide hole (621), the lifting sliding seat (63) is slidingly fitted in the lifting guide hole (621), a plurality of height clamping grooves (622) arranged from top to bottom are arranged on a vertical hole wall of the lifting guide hole (621), and the lifting sliding seat (63) is provided with a hinged long hole (633); the height locking mechanism comprises a height locking shaft (64), a height locking piece (65) and a height locking spring (66), both ends of the height locking shaft (64) are respectively fitted and installed in the two hinged long holes (633) and can be lifted and moved along the hinged long holes (633); the upper end of the height locking piece (65) is connected to the height locking shaft (64), and the lower end of the height locking piece (65) is provided with a height locking portion (651) on one side; the height locking spring (66) is used to drive the lower end of the height locking piece (65) to rotate and approach the height clamping groove (622).

10. The training chair with a locking function according to claim 9, characterized in that: The bottom of the height locking piece (65) is provided with an unlocking retaining groove (655), the bottom of the locking mounting groove (632) is provided with an unlocking retaining portion (634) capable of being inserted into the unlocking retaining groove (655) during the resetting of the backrest (6); the other vertical hole wall of the lifting guide hole (621) is provided with a first limiting portion (623) and a second limiting portion (624), and the other side of the lower end of the height locking piece (65) is provided with a linkage convex portion (656) for cooperating with the first limiting portion (623) and the second limiting portion (624).

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