Folding mechanism with lock for wheel type walking aid

Abstract

A folding mechanism with a lock for a wheel type walking aid comprises a front frame fixing structure, a rear frame fixing structure, a left joint folding connecting piece, a right joint folding connecting piece, a lower joint folding connecting piece, an automatic locking piece structure and a seat fixing plate, and a front opening is formed in the middle of the front frame fixing structure; a rear opening is formed in the middle of the rear frame fixing structure, a first shaft rod is arranged at the top of the front frame fixing structure in a penetrating mode, the automatic locking piece structure is located below the seat fixing plate and fixedly connected with the seat fixing plate, and the seat fixing plate is fixedly connected with the top face of the rear frame fixing structure. The automatic locking piece structure comprises an elastic spring bolt and an unlocking pull piece, the elastic spring bolt is locked with the first shaft rod when the front frame fixing structure and the rear frame fixing structure are unfolded, and the elastic spring bolt is separated from the first shaft rod when the unlocking pull piece is pulled. The front-back folding wheel type walking aid is applied to the front-back folding wheel type walking aid, and the front-back folding operation of the wheel type walking aid is simpler and more convenient.

Description

Technical Field

[0001] The invention relates to the field of walking aids, in particular to a locking folding mechanism used on a wheeled walker. Background Art

[0002] The folding mechanism is a common body mechanism of baby carriages, wheelchairs, trailers, wheeled walkers, etc., and is particularly used in the fields of portable furniture, tools, and front and rear folding wheeled walkers, and is suitable for a wide range of people.

[0003] The existing front-to-back foldable wheeled walker includes a front support frame and a rear support frame, and a folding mechanism is usually arranged between the front support frame and the rear support frame to realize the folding of the front support frame and the rear support frame. The operating mechanism of the existing folding mechanism is set to a snap-on type, and locking and unlocking both require manual pulling, bending, pressing and other great efforts to complete. This method is time-consuming and labor-intensive, and there is a risk of the user being injured due to loss of balance after automatic unlocking to a certain extent. For the elderly, disabled people or people with limb injuries who are highly dependent on the wheeled walker, the so-called pulling, bending, pressing and other actions are very inconvenient, and the automatic unlocking may have a very adverse effect on them and cause some injuries. Therefore, there are certain safety hazards to a certain extent, which is not conducive to the safe and effective use of the user. Summary of the invention

[0004] The present invention provides a locking folding mechanism for a wheeled walker, the main purpose of which is to overcome the problems of inconvenient operation, time-consuming and labor-intensive folding of the folding mechanism of the existing front-to-back folding wheeled walker.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A locking folding mechanism for a wheeled walker comprises a front frame fixing structure, a rear frame fixing structure, a left joint folding connector, a right joint folding connector, a lower joint folding connector, an automatic locking structure and a seat fixing plate, wherein the middle of the front frame fixing structure is provided with a front opening, the middle of the rear frame fixing structure is provided with a rear opening, a first shaft rod is passed through the top of the front frame fixing structure, the front and rear ends of the left joint folding connector are respectively hinged to the upper left side surface of the front frame fixing structure and the upper left side surface of the rear frame fixing structure, and the front and rear ends of the right joint folding connector are respectively hinged to the right side surface of the front frame fixing structure The upper part and the upper part of the right side surface of the rear frame fixing structure are hinged, the front end of the lower joint folding connecting piece is located at the bottom of the front opening and is hinged to the front frame fixing structure, the rear end of the lower joint folding connecting piece is located at the bottom of the rear opening and is hinged to the rear frame fixing structure, the automatic locking structure is located below the seat fixing plate and is fixedly connected to the seat fixing plate, the seat fixing plate is fixedly connected to the top surface of the rear frame fixing structure, the automatic locking structure includes an elastic locking tongue and an unlocking pull tab, when the front frame fixing structure and the rear frame fixing structure are unfolded, the elastic locking tongue is locked with the first shaft rod, and when the unlocking pull tab is pulled, the elastic locking tongue is disengaged from the first shaft rod.

[0006] Furthermore, the automatic lock structure also includes a shell, the elastic lock tongue is located in the shell, the front end of the elastic lock tongue extends out of the shell, the unlocking pull tab is connected to the rear end of the elastic lock tongue, a spring and a spring sleeve rod are provided in the shell, the bottom of the elastic lock tongue is provided with a receiving groove, the top of the elastic lock tongue is provided with a strip groove connected to the receiving groove, a spring resistance part is provided in the receiving groove, the spring is provided between the spring sleeve rod and the spring resistance part, the seat fixing plate is connected to the shell by a first bolt, and the bottom of the first bolt passes through the strip groove, the receiving groove and the bottom surface of the shell in sequence and is connected to a first nut.

[0007] Furthermore, the front end surface of the elastic locking tongue is an arc surface inclined from front to back.

[0008] Furthermore, a spacer sleeve is provided on the top surface of the shell, a fixing sleeve is provided inside the shell, the fixing sleeve passes through the strip groove and the receiving groove, and the first bolt passes through the spacer sleeve and the fixing sleeve.

[0009] Furthermore, the front frame fixing structure includes a left front fixing block and a right front fixing block, the front opening is formed between the left front fixing block and the right front fixing block, the first axis rod passes through the top of the left front fixing block and the top of the right front fixing block, the left part of the first axis rod passes through the front end of the left joint folding connecting piece, the right part of the first axis rod passes through the front end of the right joint folding connecting piece, and a second axis rod is passed through the bottom of the left front fixing block and the bottom of the right front fixing block, and the second axis rod passes through the front end of the lower joint folding connecting piece.

[0010] Furthermore, a first T-shaped plastic tube sleeve is provided in the top of the left front fixing block and the top of the right front fixing block, a second T-shaped plastic tube sleeve is provided in the front end of the left joint folding connecting piece and the front end of the right joint folding connecting piece, the first axis rod passes through the first T-shaped plastic tube sleeve and the second T-shaped plastic tube sleeve, a third T-shaped plastic tube sleeve is provided in the bottom of the left front fixing block and the bottom of the right front fixing block, a fourth T-shaped plastic tube sleeve is provided in the front end of the lower joint folding connecting piece, and the second axis rod passes through the third T-shaped plastic tube sleeve and the fourth T-shaped plastic tube sleeve.

[0011] Furthermore, the rear frame fixing structure includes a left rear fixing block and a right rear fixing block, the rear opening is formed between the left rear fixing block and the right rear fixing block, a third axis rod is passed through the top of the left rear fixing block and the top of the right rear fixing block, the left part of the third axis rod passes through the rear end of the left joint folding connecting piece, and the right part of the third axis rod passes through the rear end of the right joint folding connecting piece, a fourth axis rod is passed through the bottom of the left rear fixing block and the bottom of the right rear fixing block, and the fourth axis rod passes through the rear end of the lower joint folding connecting piece.

[0012] Furthermore, a fifth T-shaped plastic tube sleeve for the third axis rod to pass through is provided in the top of the left rear fixing block and the top of the right rear fixing block, a sixth T-shaped plastic tube sleeve is provided in the rear end of the left joint folding connecting piece and the rear end of the right joint folding connecting piece, the third axis rod passes through the fifth T-shaped plastic tube sleeve and the sixth T-shaped plastic tube sleeve, a seventh T-shaped plastic tube sleeve is provided in the bottom of the left rear fixing block and the bottom of the right rear fixing block, an eighth T-shaped plastic tube sleeve is provided in the rear end of the lower joint folding connecting piece, and the fourth axis rod passes through the seventh T-shaped plastic tube sleeve and the eighth T-shaped plastic tube sleeve.

[0013] Furthermore, the seat fixing plate is connected to the rear frame fixing structure through a plurality of screws.

[0014] From the above description of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages: the front frame fixing structure and the rear frame fixing structure are fixedly connected to the front support frame and the rear support frame of the front and rear foldable wheeled walker respectively, and the top surface of the seat fixing plate is connected to the seat, and when the walker is unfolded and used, the elastic locking tongue is locked with the first shaft rod, and at this time the front frame fixing structure and the rear frame fixing structure cannot be folded; when the front and rear foldable wheeled walker needs to be folded, the unlocking pull tab is pulled to disengage the elastic locking tongue from the first shaft rod, and then the front end of the seat is lifted up, and the rear frame fixing structure, the left joint folding connector, the right joint folding connector, the lower joint folding connector, the automatic locking structure, the seat fixing plate and the seat are folded synchronously, so that the rear support frame of the front and rear foldable wheeled walker is folded close to the front support frame, thereby completing the folding of the walker. When the wheeled walker is opened, the front support frame and the rear support frame of the front-to-back foldable wheeled walker are opened front and back, and under the action of gravity, the rear frame fixing structure, the left joint folding connector, the right joint folding connector, the lower joint folding connector, the automatic locking structure, the seat fixing plate and the seat move downward, and the elastic locking tongue is locked with the first shaft rod. The present invention is applied to the front-to-back foldable wheeled walker, and the front-to-back folding of the wheeled walker is more convenient and labor-saving. It can be unlocked by pulling the unlocking pull tab, and it can be automatically locked under the action of gravity of the rear frame fixing structure, the left joint folding connector, the right joint folding connector, the lower joint folding connector, the automatic locking structure, the seat fixing plate and the seat, which also reduces the safety hazards of the user during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present invention.

[0016] Figure 2 It is a structural diagram of the present invention at another angle.

[0017] Figure 3 It is a structural decomposition diagram of the present invention.

[0018] Figure 4 for Figure 3 Further structural decomposition diagram of .

[0019] Figure 5 It is a structural diagram of the automatic lock structure of the present invention.

[0020] Figure 6 It is a structural exploded view of the automatic lock structure of the present invention.

[0021] Figure 7 An exploded view of the automatic lock structure of the present invention at another angle.

[0022] Figure 8 It is a cross-sectional view of the present invention.

[0023] Fig. 9 It is a structural diagram of the present invention after folding.

[0024] Fig.10 It is a structural diagram of the present invention at another angle after being folded.

[0025] Fig.11 This is a usage state diagram of the present invention. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] Reference Figures 1 to 3 , Figure 8 A locking folding mechanism for a wheeled walker comprises a front frame fixing structure 1, a rear frame fixing structure 2, a left joint folding connector 3, a right joint folding connector 4, a lower joint folding connector 5, an automatic lock structure 6 and a seat fixing plate 7. A front opening 10 is provided in the middle of the front frame fixing structure 1, a rear opening 20 is provided in the middle of the rear frame fixing structure 2, and a first shaft rod 8 is passed through the top of the front frame fixing structure 1. The front and rear ends of the left joint folding connector 3 are respectively hinged to the upper left side surface of the front frame fixing structure 1 and the upper left side surface of the rear frame fixing structure 2, the front and rear ends of the right joint folding connector 4 are respectively hinged to the upper right side surface of the front frame fixing structure 1 and the upper right side surface of the rear frame fixing structure 2, the front end of the lower joint folding connector 5 is located at the bottom of the front opening 10 and is hinged to the front frame fixing structure 1, and the rear end of the lower joint folding connector 5 is located at the bottom of the rear opening 20 and is hinged to the rear frame fixing structure 2. The automatic lock structure 6 is located below the seat fixing plate 7 and is fixedly connected to the seat fixing plate 7. The seat fixing plate 7 is fixedly connected to the top surface of the rear frame fixing structure 2. The automatic lock structure 6 includes an elastic lock tongue 61 and an unlocking pull tab 62. When the front frame fixing structure 1 and the rear frame fixing structure 2 are unfolded, the elastic lock tongue 61 is locked with the first shaft rod 8. At the same time, the front bottom surface of the seat fixing plate 7 is in conflict with the top surface of the front frame fixing structure 1. When the unlocking pull tab 62 is pulled, the elastic lock tongue 61 is separated from the first shaft rod 8. The front end surface of the elastic lock tongue 61 is a circular arc surface 611 inclined from front to back.

[0028] Reference Figure 1 The front frame fixing structure 1, the rear frame fixing structure 2, the left joint folding connecting piece 3, the right joint folding connecting piece 4, the lower joint folding connecting piece 5, the automatic locking structure 6 and the seat fixing plate 7 are all made of metal materials.

[0029] Reference Figure 1 , Figures 3 to 8 The automatic lock structure 6 also includes a housing 63, which is formed by connecting an upper housing and a lower housing. The elastic lock tongue 61 is located in the housing 63, and the front end of the elastic lock tongue 61 extends out of the housing 63. The unlocking pull tab 62 is connected to the rear end of the elastic lock tongue 61. A spring 64 and a spring sleeve rod 65 are arranged in the housing 63. The bottom of the elastic lock tongue 61 is provided with a receiving groove 66. The top of the elastic lock tongue 61 is provided with a strip groove 67 connected to the receiving groove 66. The receiving groove 66 is provided with a spring contact portion 68. The spring 64 is arranged between the spring sleeve rod 65 and the spring contact portion 68. The seat fixing plate 4 is connected to the housing 63 by a first bolt 69. The bottom of the first bolt 69 passes through the strip groove 67, the receiving groove 66 and the bottom surface of the housing 63 in sequence and is connected to a first nut 60. The first bolt 69 is a hexagon socket bolt. A spacer sleeve 631 is provided on the top surface of the shell 63, a fixing sleeve 632 is provided inside the shell 63, the fixing sleeve 632 passes through the strip groove 67 and the receiving groove 66, and the first bolt 69 passes through the spacer sleeve 631 and the fixing sleeve 632. In this embodiment, two of each of the first bolt 69, the first nut 60, the spacer sleeve 631 and the fixing sleeve 632 are provided.

[0030] Reference Figures 1 to 4The front frame fixing structure 1 includes a left front fixing block 11 and a right front fixing block 12, wherein the front opening 10 is formed between the left front fixing block 11 and the right front fixing block 12, wherein the first shaft rod 8 passes through the top of the left front fixing block 11 and the top of the right front fixing block 12, wherein the left portion of the first shaft rod 8 passes through the front end of the left joint folding connector 3, and the right portion of the first shaft rod 8 passes through the front end of the right joint folding connector 4. A second shaft rod 13 is provided through the bottom of the left front fixing block 11 and the bottom of the right front fixing block 12, and the second shaft rod 13 passes through the front end of the lower joint folding connector 5. A first T-shaped plastic tube sleeve 14 is provided in the top of the left front fixing block 11 and the top of the right front fixing block 12, wherein a second T-shaped plastic tube sleeve 15 is provided in the front end of the left joint folding connector 3 and the front end of the right joint folding connector 4, and the first shaft rod 8 passes through the first T-shaped plastic tube sleeve 14 and the second T-shaped plastic tube sleeve 15. A third T-shaped plastic tube sleeve 16 is provided in the bottom of the left front fixing block 11 and the bottom of the right front fixing block 12, a fourth T-shaped plastic tube sleeve 17 is provided in the front end of the lower joint folding connecting piece 5, and the second shaft rod 13 passes through the third T-shaped plastic tube sleeve 16 and the fourth T-shaped plastic tube sleeve 17.

[0031] Reference Figures 1 to 4 , the first T-shaped plastic tube sleeve 14 can avoid the wear between the left front fixing block 11 and the right front fixing block 12 and the first shaft rod 8 during the folding or unfolding process, and can reduce the gap between the left front fixing block 11 and the right front fixing block 12 and the first shaft rod 8. The second T-shaped plastic tube sleeve 15 can avoid the wear between the front end of the left joint folding connector 3 and the right joint folding connector 4 and the first shaft rod 8 during the folding or unfolding process, and can reduce the gap between the left joint folding connector 3 and the right joint folding connector 4 and the first shaft rod 8. The third T-shaped plastic tube sleeve 16 can avoid the wear between the left front fixing block 11 and the right front fixing block 12 and the second shaft rod 13 during the folding or unfolding process, and can reduce the gap between the left front fixing block 11 and the right front fixing block 12 and the second shaft rod 13. The fourth T-shaped plastic tube sleeve 17 can avoid the wear between the lower joint folding connector 5 and the second shaft rod 13 during the folding or unfolding process, and can reduce the gap between the lower joint folding connector 5 and the second shaft rod 13.

[0032] Reference Figures 1 to 4The rear frame fixing structure 2 includes a left rear fixing block 21 and a right rear fixing block 22, both of which are triangular-shaped, and the rear opening 20 is formed between the left rear fixing block 21 and the right rear fixing block 22. A third shaft rod 23 is penetrated through the top of the left rear fixing block 21 and the top of the right rear fixing block 22, and the left part of the third shaft rod 23 passes through the rear end of the left joint folding connecting member 3, and the right part of the third shaft rod 23 passes through the rear end of the right joint folding connecting member 4. A fourth shaft rod 24 is penetrated through the bottom of the left rear fixing block 21 and the bottom of the right rear fixing block 22, and the fourth shaft rod 24 passes through the rear end of the lower joint folding connecting member 5. A fifth T-shaped plastic tube sleeve 25 is provided in the top of the left rear fixing block 21 and the top of the right rear fixing block 22 for the third shaft rod 23 to pass through. A sixth T-shaped plastic tube sleeve 26 is provided in the rear end of the left joint folding connector 3 and the rear end of the right joint folding connector 4. The third shaft rod 23 passes through the fifth T-shaped plastic tube sleeve 25 and the sixth T-shaped plastic tube sleeve 26. A seventh T-shaped plastic tube sleeve 27 is provided in the bottom of the left rear fixing block 21 and the bottom of the right rear fixing block 22. An eighth T-shaped plastic tube sleeve 28 is provided in the rear end of the lower joint folding connector 5. The fourth shaft rod 24 passes through the seventh T-shaped plastic tube sleeve 27 and the eighth T-shaped plastic tube sleeve 28.

[0033] Reference Figures 1 to 4 The fifth T-shaped plastic tube sleeve 25 can avoid the wear between the third shaft rod 23 and the left rear fixing block 21 and the right rear fixing block 22 during folding or unfolding, and can reduce the gap between the third shaft rod 23 and the left rear fixing block 21 and the right rear fixing block 22. The sixth T-shaped plastic tube sleeve 26 can avoid the wear between the third shaft rod 23 and the left joint folding connector 3 and the right joint folding connector 4 during folding or unfolding, and can reduce the gap between the third shaft rod 23 and the left joint folding connector 3 and the right joint folding connector 4. The seventh T-shaped plastic tube sleeve 27 can avoid the wear between the fourth shaft rod 24 and the left rear fixing block 21 and the right rear fixing block 22 during folding or unfolding, and can reduce the gap between the fourth shaft rod 24 and the left rear fixing block 21 and the right rear fixing block 22. The eighth T-shaped plastic tube sleeve 28 can avoid the wear between the fourth shaft rod 24 and the lower joint folding connector 5 during folding or unfolding, and can reduce the gap between the fourth shaft rod 24 and the lower joint folding connector 5.

[0034] Reference Figure 1 , Figure 3 and Fig.11In this embodiment, the front ends of the left front fixing block 11 and the right front fixing block 12 are both provided with a front mounting opening 18, and the front support frame 30 of the front and rear foldable wheeled walker is welded in the front mounting opening 18; the rear ends of the left rear fixing block 21 and the right rear fixing block 22 are both provided with a rear mounting opening 29, and the rear support frame 31 of the front and rear foldable wheeled walker is locked in the rear mounting opening 29. The first shaft rod 8, the second shaft rod 13, the third shaft rod 23 and the fourth shaft rod 24 are all hexagon socket bolts, and one end of the hexagon socket bolt is provided with a threaded section, and the threaded section is connected with a second nut 19.

[0035] Reference Figure 2 , Figure 3 and Fig.11 The seat fixing plate 7 is connected to the rear frame fixing structure 2 through a plurality of screws 71. Specifically, the seat fixing plate 7 is fixedly connected to the left rear fixing block 21 and the right rear fixing block 22 through screws 71, and the top surface of the seat fixing plate 7 is connected to the seat 32.

[0036] Reference Figures 1 to 11The design principle of the present invention is as follows: the left front fixing block 11 and the right front fixing block 12 of the front frame fixing structure 1 are welded to the front support frame 30 of the front-rear foldable wheeled walker, the left rear fixing block 21 and the right rear fixing block 22 of the rear frame fixing structure 2 are fixedly connected to the rear support frame 31 of the front-rear foldable wheeled walker, and the top surface of the seat fixing plate 7 is connected to the seat 32. When the front-rear foldable wheeled walker is unfolded for use, the top of the elastic locking tongue 61 contacts and locks with the bottom of the first shaft rod 8, and at this time the front frame fixing structure 1 and the rear frame fixing 2 structures cannot be folded. When the front-rear foldable wheeled walker needs to be folded, the unlocking pull tab 62 is pulled backwards and the elastic locking tongue 61 is driven to move backwards, so that the elastic locking tongue 61 is disengaged from the first shaft rod 8, and then the front end of the seat 32 is lifted up, and the rear frame fixing structure 2, the left joint folding connecting piece 3, the right joint folding connecting piece 4, the lower joint folding connecting piece 5, the automatic locking structure 6, the seat fixing plate 7 and the seat are folded synchronously, so that the rear support frame 31 of the front-rear foldable wheeled walker is folded close to the front support frame 30, thereby completing the folding of the walker. When the wheeled walker is opened, the front support frame 30 and the rear support frame 31 of the front-to-rear foldable wheeled walker are opened front and back, and under the action of gravity, the rear frame fixing structure 2, the left joint folding connector 3, the right joint folding connector 4, the lower joint folding connector 5, the automatic locking structure 6, the seat fixing plate 7 and the seat move downward, and when the arc surface 611 at the front end of the elastic locking tongue 61 conflicts with the first shaft rod 8, since the arc surface 611 is inclined from front to back, as the elastic locking tongue 61 descends, the elastic locking tongue 61 automatically moves backward until the arc surface 61 is no longer in contact with the first shaft rod 8, and the elastic locking tongue 61 automatically resets, and the top of the elastic locking tongue 61 conflicts with the bottom of the first shaft rod 8 again and is locked.

[0037] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A locking folding mechanism for a wheeled walker, characterized in that: The seat frame comprises a front frame fixing structure, a rear frame fixing structure, a left joint folding connecting piece, a right joint folding connecting piece, a lower joint folding connecting piece, an automatic locking piece structure and a seat fixing plate, wherein the middle portion of the front frame fixing structure is provided with a front opening, the middle portion of the rear frame fixing structure is provided with a rear opening, a first shaft rod is passed through the top of the front frame fixing structure, the front and rear ends of the left joint folding connecting piece are respectively hinged to the upper left side surface of the front frame fixing structure and the upper left side surface of the rear frame fixing structure, and the front and rear ends of the right joint folding connecting piece are respectively hinged to the upper right side surface of the front frame fixing structure and the upper right side surface of the rear frame fixing structure The upper right side surface of the structure is hinged, the front end of the lower joint folding connecting piece is located at the bottom of the front opening and is hinged to the front frame fixing structure, the rear end of the lower joint folding connecting piece is located at the bottom of the rear opening and is hinged to the rear frame fixing structure, the automatic locking structure is located below the seat fixing plate and is fixedly connected to the seat fixing plate, the seat fixing plate is fixedly connected to the top surface of the rear frame fixing structure, the automatic locking structure includes an elastic locking tongue and an unlocking pull tab, when the front frame fixing structure and the rear frame fixing structure are unfolded, the elastic locking tongue is locked with the first shaft rod, and when the unlocking pull tab is pulled, the elastic locking tongue is disengaged from the first shaft rod.

2. A locking folding mechanism for a wheeled walker as claimed in claim 1, characterized in that: The automatic lock structure also includes a shell, the elastic lock tongue is located in the shell, the front end of the elastic lock tongue extends out of the shell, the unlocking pull tab is connected to the rear end of the elastic lock tongue, a spring and a spring sleeve rod are provided in the shell, the bottom of the elastic lock tongue is provided with a receiving groove, the top of the elastic lock tongue is provided with a strip groove connected to the receiving groove, a spring resistance part is provided in the receiving groove, the spring is provided between the spring sleeve rod and the spring resistance part, the seat fixing plate is connected to the shell by a first bolt, and the bottom of the first bolt passes through the strip groove, the receiving groove and the bottom surface of the shell in sequence and is connected to a first nut.

3. The locking folding mechanism for a wheeled walker according to claim 1, characterized in that: The front end surface of the elastic locking tongue is an arc surface inclined from front to back.

4. The locking folding mechanism for a wheeled walker according to claim 2, characterized in that: A spacer sleeve is provided on the top surface of the shell, a fixing sleeve is provided in the shell, the fixing sleeve passes through the strip groove and the accommodating groove, and the first bolt passes through the spacer sleeve and the fixing sleeve.

5. The locking folding mechanism for a wheeled walker according to claim 1, characterized in that: The front frame fixing structure includes a left front fixing block and a right front fixing block, the front opening is formed between the left front fixing block and the right front fixing block, the first shaft rod passes through the top of the left front fixing block and the top of the right front fixing block, the left part of the first shaft rod passes through the front end of the left joint folding connecting piece, the right part of the first shaft rod passes through the front end of the right joint folding connecting piece, a second shaft rod is passed through the bottom of the left front fixing block and the bottom of the right front fixing block, and the second shaft rod passes through the front end of the lower joint folding connecting piece.

6. A locking folding mechanism for a wheeled walker as claimed in claim 5, characterized in that: A first T-shaped plastic tube sleeve is provided in the top of the left front fixing block and the top of the right front fixing block, a second T-shaped plastic tube sleeve is provided in the front end of the left joint folding connecting piece and the front end of the right joint folding connecting piece, the first shaft rod passes through the first T-shaped plastic tube sleeve and the second T-shaped plastic tube sleeve, a third T-shaped plastic tube sleeve is provided in the bottom of the left front fixing block and the bottom of the right front fixing block, a fourth T-shaped plastic tube sleeve is provided in the front end of the lower joint folding connecting piece, and the second shaft rod passes through the third T-shaped plastic tube sleeve and the fourth T-shaped plastic tube sleeve.

7. The locking folding mechanism for a wheeled walker according to claim 1, characterized in that: The rear frame fixing structure includes a left rear fixing block and a right rear fixing block, the rear opening is formed between the left rear fixing block and the right rear fixing block, a third shaft rod is passed through the top of the left rear fixing block and the top of the right rear fixing block, the left part of the third shaft rod passes through the rear end of the left joint folding connecting piece, and the right part of the third shaft rod passes through the rear end of the right joint folding connecting piece, a fourth shaft rod is passed through the bottom of the left rear fixing block and the bottom of the right rear fixing block, and the fourth shaft rod passes through the rear end of the lower joint folding connecting piece.

8. The locking folding mechanism for a wheeled walker according to claim 7, characterized in that: A fifth T-shaped plastic tube sleeve for the third axis rod to pass through is provided in the top of the left rear fixing block and the top of the right rear fixing block, a sixth T-shaped plastic tube sleeve is provided in the rear end of the left joint folding connecting piece and the rear end of the right joint folding connecting piece, the third axis rod passes through the fifth T-shaped plastic tube sleeve and the sixth T-shaped plastic tube sleeve, a seventh T-shaped plastic tube sleeve is provided in the bottom of the left rear fixing block and the bottom of the right rear fixing block, an eighth T-shaped plastic tube sleeve is provided in the rear end of the lower joint folding connecting piece, and the fourth axis rod passes through the seventh T-shaped plastic tube sleeve and the eighth T-shaped plastic tube sleeve.

9. The locking folding mechanism for a wheeled walker according to claim 1, characterized in that: The seat fixing plate is connected to the rear frame fixing structure through a plurality of screws.

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