Folding ladder capable of being quickly locked

Abstract

The folding ladder comprises a first ladder foot, a second ladder foot, a pedal and a lock catch structure, the upper ends of the first ladder foot and the second ladder foot are movably connected with each other, the lower ends of the first ladder foot and the second ladder foot are supported on the ground, the pedal is movably connected with the first ladder foot and the second ladder foot, and the lock catch structure is provided with a handle plate, a lock hook, a connecting rod and an elastic piece; the handle plate and the lock hook are movably connected with the pedal through the connecting rod, the connecting end of the lock hook is movably connected with the handle plate and the pedal through the connecting rod, and the locking end of the lock hook is used for hooking the reinforcing rod of the first ladder foot or the second ladder foot; the elastic piece is arranged on the connecting rod in a sleeving mode, elastically connected with the pedal and the lock hook and used for enabling the locking end of the lock hook to hook the reinforcing rod when the lifting handle plate overturns downwards and driving the locking end of the lock hook to be separated from the reinforcing rod through the limiting piece when the lifting handle plate overturns upwards. Therefore, the structure of the lock catch structure is simplified, the lock catch structure is easy to process and produce, convenient to replace and maintain in actual use, higher in operation flexibility and humanized in design.

Description

Technical Field

[0001] The utility model relates to the technical field of ladders, in particular to a folding ladder with a quick lock. Background Art

[0002] Folding ladders are widely used because they can be folded and stored, take up little space and are easy to carry. For example, they are used in places such as residences, libraries, and building power maintenance. When unfolding a folding ladder for use, it is necessary to adjust the height, angle, and footrest stability of the ladder, and then lock the adjusted ladder to ensure normal and safe use of the ladder.

[0003] There are many folding ladders with locking structures on the market, such as the Chinese utility model patent with publication number CN218953227U and patent name "A herringbone ladder with a convenient lock". It is provided with a lock, which has an integrally formed installation body, a lock hook, an elastic member and an unlocking member. When locking, the main ladder and the auxiliary ladder are unfolded, and during the rotation of the top plate, the lock hook and the lock rod gradually approach and connect, and the lock hook will be pressed and rotated, so that the lock hook passes through the lock rod until the lock teeth of the lock sleeve are stuck in the lock groove of the lock hook to lock; when unlocking, the unlocking member is manually pressed, and the unlocking member moves downward to drive the installation body to rotate. When the installation body rotates, the elastic member is compressed, and the lock hook is separated from the lock teeth, and the lock between the lock hook and the lock sleeve is released.

[0004] Although the existing folding ladder can perform basic structural locking when unfolded for use, it still has the following defects: the lock of the existing ladder has a complex structural design, with many structural components and an integrated molding design. When one part of it is damaged, the entire lock needs to be replaced, which increases the replacement cost; and locking and unlocking can only be performed by pressing downwards. The lock is not flexible enough and the operation is cumbersome, which causes inconvenience to users and lacks humanized design, resulting in a poor user experience. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model aims to provide a folding ladder with a quick lock.

[0006] The purpose of the utility model is achieved by the following technical solution: a folding ladder with quick lock, comprising a first ladder foot, a second ladder foot, a pedal and a lock structure, wherein the upper ends of the first ladder foot and the second ladder foot are movably connected to each other and the lower ends are supported on the ground, the pedals are provided with a plurality of pieces, and the plurality of pedals are movably provided along the length direction of the first ladder foot and the second ladder foot, and the lock structure comprises a handle plate, a lock hook, a connecting rod and an elastic member;

[0007] The handle plate is movably connected to the pedal via a connecting rod, the connecting end of the locking hook is movably connected to the handle plate and the pedal via a connecting rod, the handle plate is provided with a limiting member for abutting against the locking hook, and the locking end of the locking hook is used to hook the reinforcing rod of the first ladder foot or the second ladder foot;

[0008] The elastic member is sleeved on the connecting rod and is elastically connected to the pedal and the locking hook, and is used to hook the locking end of the locking hook onto the reinforcing rod when the handle plate is flipped downward, and to drive the locking end of the locking hook to disengage from the reinforcing rod through the limiting member when the handle plate is flipped upward.

[0009] Furthermore, the locking end of the locking hook is provided with a hooking portion for hooking the reinforcing rod of the first ladder foot or the second ladder foot, and the hooking portion is arranged in an arc shape.

[0010] Furthermore, the limiting piece is arranged at the bottom of the handle plate, and the bottom of the locking structure is provided with a disengaging slope for abutting against the limiting piece of the handle plate, and the disengaging slope is gradually inclined upward from the connecting end and the locking end of the locking structure to the middle part of the lock, so that the limiting piece can slide back and forth on the disengaging slope when the handle plate is flipped upward or downward.

[0011] Furthermore, two or more locking structures are provided, and the two locking structures are arranged in parallel in the length setting direction of the reinforcement rod of the ladder foot and are integrally connected through a connecting arm; the middle part of the elastic member is connected to the pedal, and the two ends of the elastic member are sleeved on the connecting rod and are connected one by one to the two locking structures arranged in parallel.

[0012] Furthermore, one end of the pedal is movably connected to the first ladder foot via a rotating shaft, and the other end of the pedal is supported on the reinforcing rod of the second ladder foot; a locking notch is provided at one end of the pedal supported on the reinforcing rod, and a positioning hook for connecting to the middle part of the elastic member is provided on the edge of the locking notch;

[0013] The number of connecting rods corresponds to the number of locking structures. Connecting rods are fixedly connected to both sides of the locking notch. One end of the handle plate and the connecting ends of the two locking structures are movably connected to the connecting rods one by one through the opening of axial holes. The locking structure is arranged below the handle plate.

[0014] Furthermore, one end of the pedal having the locking notch is provided with a positioning groove for matching and engaging with the reinforcing rod of the second ladder foot.

[0015] Furthermore, a handle is provided at one end of the handle plate away from the end connected to the connecting rod.

[0016] Furthermore, the first ladder foot is configured as a U-shaped structure with an opening facing the ground, and the second ladder foot is composed of two parallel tube feet connected to a plurality of reinforcing rods. The upper end of the second ladder foot is movably connected to the upper end of the first ladder foot and the upper end movable connection is used as a fulcrum for unfolding and supporting or folding and storing.

[0017] Furthermore, one end of the pedal is movably connected to the first ladder foot via a pin, and the other end of the pedal is movably connected to the pedals arranged on the upper and lower layers and the pins of the second ladder foot via a connecting plate.

[0018] Furthermore, a plurality of anti-slip patterns are arranged on the upper surface of the pedal.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] (1) The lock structure of the folding ladder of the present application has a handle plate and a lock hook that are movably connected to the pedal through a connecting rod, and an elastic member is sleeved on the connecting rod to elastically connect the lock hook to the pedal. Since the handle plate, the lock hook and the elastic member are all detachably connected, the structure is simple, easy to process and produce, and convenient to replace and repair in actual use; since the handle plate is movably connected to the pedal through the connecting rod, it can be turned up and down by manual operation, and can be used to turn the handle plate downward and combine with the rebound effect of the elastic member to hook the locking end of the lock hook to the reinforcing rod of the ladder foot, and the locking end of the lock hook can be driven to fit more closely to the reinforcing rod by lifting the handle plate upward. Compared with the previous implementation method that can only be pressed downward to lock, the present invention can lock the reinforcing rod regardless of pressing the handle plate to turn downward or lifting the handle plate to turn upward, and the operation flexibility is higher; and when the handle plate is turned upward, the locking end of the lock hook is driven to separate from the reinforcing rod through the limit member, which conforms to the operating habits of the public, embodies a humanized design, and improves the user experience.

[0021] (2) The locking end of the locking hook is provided with an arc-shaped hooking portion, which improves the matching degree between the hooking portion and the cylindrical reinforcing rod on the ladder foot, so that the hooking effect between the hooking portion and the reinforcing rod is more stable, thereby improving the stability of the step when the ladder is unfolded and used, and providing higher safety.

[0022] (3) The limit piece provided at the bottom of the handle plate is abutted against the release slope at the bottom of the lock hook for assembly. The limit piece can be used to generate an upward abutting force on the lock hook by manually lifting the handle plate upward. Combined with the oblique design of the release slope, the limit piece slides toward the locking end of the lock hook, driving the locking end of the lock hook to flip upward to disengage from the reinforcing rod of the ladder foot. The operation is simple and saves physical effort.

[0023] (4) The pedal support is provided with a locking notch at one end of the reinforcing rod of the second ladder foot for accommodating and installing the locking structure, so that the locking structure can be partially embedded in the pedal, thereby improving the assembly stability between the locking structure and the pedal and achieving a higher overall effect; and a positioning hook for hooking the middle part of the elastic member is provided on the edge of the locking notch, which is used to position the elastic member sleeved on the connecting rod, and the elastic member can be disassembled and assembled very conveniently without the use of tools.

[0024] (5) The pedal support is provided with a positioning groove at one end of the reinforcing rod of the second ladder foot. When the folding ladder is unfolded for use, the pedal is flipped to a horizontal state and is engaged with the reinforcing rod through the positioning groove, thereby preventing the pedal from sliding in the horizontal direction, and further improving the overall stability of the pedal and the folding ladder.

[0025] (6) The handle is provided with a handle for manual operation by the user, which is convenient for the user to hold and operate when pressing down or lifting the handle. It has a humanized design and further improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of a folding ladder in a preferred embodiment of the utility model;

[0027] Figure 2 A three-dimensional diagram of a pedal and a locking reinforcing rod of a locking structure in a preferred embodiment of the utility model;

[0028] Figure 3 for Figure 2 Magnified view at A in the middle;

[0029] Figure 4 This is a schematic diagram of the structure decomposition between the pedal, handle plate, lock hook, elastic member, connecting rod and reinforcing rod in a preferred embodiment of the utility model;

[0030] Figure 5 for Figure 4 Magnified view at B in the middle;

[0031] Figure 6 This is a bottom view of the pedal and the locking reinforcement rod of the locking structure in the preferred embodiment of the utility model;

[0032] Figure 7 for Figure 6 Cross-sectional view in CC direction;

[0033] Figure 8 for Figure 7 Magnified view at D in the middle.

[0034] In the figure:

[0035] 10. First ladder foot; 11. Second ladder foot; 12. Reinforcement rod;

[0036] 20. pedal; 201. lock notch; 202. positioning hook; 203. positioning groove; 204. anti-slip pattern; 21. connecting plate;

[0037] 30. Lock structure; 301. Handle plate; 3011. Limiting member; 3012. Handle; 3013. Axial hole; 302. Lock hook; 3021. Connecting end; 3022. Disengagement slope; 3023. Locking end; 3024. Hooking part; 3025. Guide slope; 303. Connecting rod; 304. Elastic member. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0039] like Figure 1-8 As shown, a folding ladder with a quick lock can be used in daily living, libraries, building power maintenance and other places. The folding ladder with a quick lock includes a first ladder foot 10, a second ladder foot 11, a pedal 20 and a lock structure 30, wherein the first ladder foot 10 is set as a U-shaped structure with an opening facing the ground, and the second ladder foot 11 is provided with two leg tubes, which are arranged parallel to each other and connected by a plurality of reinforcing rods 12. The upper end of the second ladder foot 11 is movably connected to the upper end of the first ladder foot 10, so that the second ladder foot 11 uses the upper end movable connection as a fulcrum to be unfolded and supported or folded and stored with the first ladder foot 10.

[0040] The pedals 20 are provided in a plurality of pieces, and the plurality of pedals 20 are movably provided along the length direction of the first ladder foot 10 and the second ladder foot 11. In the embodiment of the present application, two pedals 20 are preferably provided on the ladder foot. Among them, the two sides of one end of the pedal 20 near the lower end of the ladder foot are movably connected with the first ladder foot 10 through a pin shaft, and the two sides of the other end of the pedal 20 are movably connected with the pedal 20 near the upper end of the ladder foot and the pin of the second ladder foot 11 through a connecting plate 21. Therefore, the pedal 20 near the lower end of the ladder foot serves as a driven pedal 20.

[0041] The pedal 20 arranged near the upper end of the ladder foot serves as the active pedal 20. The driven pedal 20 is driven by operating the active pedal 20. The upper surfaces of the active pedal 20 and the driven pedal 20 are both provided with a plurality of anti-slip grooves 204 to increase the friction when the user steps on the pedal 20, making it safer to use.

[0042] The left and right sides of one end of the active pedal 20 are movably connected to the first ladder foot 10 through a rotating shaft, so that the pedal 20 can be turned up and down on the first ladder foot 10. When the pedal 20 is turned to a horizontal state, the other end of the pedal 20 can be supported on the reinforcing rod 12 of the second ladder foot 11. The end of the pedal 20 supported on the reinforcing rod 12 is provided with a locking notch 201 and a positioning groove 203, and the positioning groove 203 is arranged at the bottom of the pedal 20. Therefore, the pedal 20 can be matched and engaged with the reinforcing rod 12 on the second ladder foot 11 through the positioning groove 203 at the bottom, thereby preventing the pedal 20 from sliding in the horizontal direction, and further improving the overall stability of the pedal 20 and the folding ladder.

[0043] The locking structure 30 comprises a handle plate 301, a lock hook 302, a connecting rod 303 and an elastic member 304, wherein the connecting rod 303 is fixedly connected to the left and right edges of the locking notch 201, and an axial hole 3013 is provided at one end of the handle plate 301 and the handle plate 301 is movably mounted on the locking notch 201 of the pedal 20 through the assembly of the axial hole 3013 and the connecting rod 303, so that the handle plate 301 can be turned up and down on the locking notch 201 of the pedal 20. By providing the locking notch 201 for accommodating and installing the locking structure 30 on one end side of the pedal 20, the locking structure 30 can be partially embedded in the pedal 20, thereby improving the assembly stability between the locking structure 30 and the pedal 20, and achieving a higher overall effect.

[0044] A handle 3012 is provided at one end of the handle plate 301 away from the connecting rod 303. The handle 3012 is used to facilitate the user to hold the handle plate 301 when pressing down or lifting it. It has a humanized design and further improves the user experience.

[0045] The locking hook 302 has a connecting end 3021 and a locking end 3023. The connecting end 3021 of the locking hook 302 is provided with an axial hole 3013 and the bottom of the handle plate 301 is movably mounted through the axial hole 3013 and the assembly with the connecting rod 303, so that the locking hook 302, the handle plate 301 and the pedal 20 form a movable assembly. In addition, the locking end 3023 of the locking hook 302 is used to hook the reinforcing rod 12 provided on the second ladder foot 11, so as to lock the first ladder foot 10 and the second ladder foot 11 in the unfolded state.

[0046] The elastic member 304 is sleeved on the connecting rod 303, the locking notch 201 is opened on the side of one end of the pedal 20 supported on the reinforcing rod 12, and a positioning hook 202 is arranged on the inner side edge of the locking notch 201. When the elastic member 304 is installed, the pedal 20 uses its positioning hook 202 to tighten the middle part of the elastic member 304, and the two ends of the elastic member 304 are connected to the locking hook 302, so as to realize the elastic connection function between the locking hook 302 and the handle plate 301 and the pedal 20, and the elastic member 304 is very convenient to disassemble and assemble without using tools. Under normal conditions, the locking end 3023 of the locking hook 302 has the elastic force toward the reinforcing rod 12 of the second ladder foot 11 under the elastic action of the elastic member 304.

[0047] A stopper 3011 is provided at the bottom of the handle plate 301. After the connecting end 3021 of the lock hook 302 is movably connected to the connecting rod 303, the bottom or side of the lock hook 302 abuts against the stopper 3011 of the handle plate 301. When the user presses down or lifts the handle plate 301 by hand, the handle plate 301 can drive the locking end 3023 of the lock hook 302 to flip up and down through the stopper 3011.

[0048] In actual use, when locked, the locking end 3023 of the lock hook 302 is located above the reinforcing rod 12 of the second ladder foot 11. The user holds the handle 3012 of the handle plate 301 and manually presses the handle plate 301 to flip it downward. At the same time, the handle plate 301 presses the top of the lock hook 302 downward, so that the locking end 3023 of the lock hook 302 can be turned downward with the connection end 3021 as a fulcrum and close to the reinforcing rod 12. Since the outer side of the locking end 3023 of the lock hook 302 is provided with a guide inclined surface 3025, the locking end 3023 of the lock hook 302 continues to flip downward and slides to the outside of the reinforcing rod 12 through the guide inclined surface 3025 and locks the reinforcing rod 12. The user can also use appropriate force to lift the handle plate 301 upward, so that the locking end 3023 of the lock hook 302 fits the reinforcing rod 12 more closely.

[0049] It should be noted that the force used when manually lifting the handle plate 301 needs to be moderate, until the locking end 3023 of the locking hook 302 can hook the reinforcing rod 12, and avoid using too much force to cause the locking end 3023 of the locking hook 302 to separate from the reinforcing rod 12.

[0050] When unlocking, the user holds the handle 3012 of the handle plate 301 and manually lifts the handle plate 301 to flip it upward. The handle plate 301 abuts against the bottom of the lock hook 302 through the limiting member 3011 at its bottom. The limiting member 3011 generates an upward abutting force on the bottom of the lock hook 302, thereby driving the locking end 3023 of the lock hook 302 to flip upward. The user can increase the force appropriately to make the locking end 3023 of the lock hook 302 disengage from the reinforcing rod 12.

[0051] In this way, the lock structure 30 of the folding ladder of the present application, the handle plate 301, the lock hook 302 are movably connected to the pedal 20 through the connecting rod 303, and the elastic member 304 is sleeved on the connecting rod 303 to elastically connect the lock hook 302 to the pedal 20. Since the handle plate 301, the lock hook 302 and the elastic member 304 are all detachably connected, the structure is simple, easy to process and produce, and convenient for replacement and maintenance in actual use; since the handle plate 301 is movably connected to the pedal 20 through the connecting rod 303, it can be turned up and down by manual operation, which can be used for the handle plate 301 to turn down and combine with the rebound of the elastic member 304. The locking end 3023 of the locking hook 302 can be hooked onto the reinforcing rod 12 of the ladder foot, and the handle plate 301 can be lifted up to drive the locking end 3023 of the locking hook 302 to make it fit more closely to the reinforcing rod 12. Compared with the previous implementation method that can only be pressed downward to lock, the present invention can lock the reinforcing rod 12 regardless of pressing the handle plate 301 downward or lifting the handle plate 301 upward, and the operation flexibility is higher; and when the handle plate 301 is flipped upward, the locking end 3023 of the locking hook 302 can be driven to disengage from the reinforcing rod 12 through the limit piece 3011, which conforms to the public's operating habits, embodies a humanized design, and improves the user experience.

[0052] In the embodiment of the present application, two or more locking structures 30 are provided, and the two locking structures 30 are arranged in parallel in the length setting direction of the reinforcing rod 12 of the second ladder foot 11 and are connected by a connecting arm through integral molding, and the two ends of the elastic member 304 are sleeved on the connecting rod 303 and then connected one by one to the two locking structures 30 arranged in parallel. In order to facilitate the installation of the locking structure 30 on the locking notch 201 of the pedal 20, the number of the connecting rods 303 fixedly connected to the locking notch 201 corresponds to the number of the locking structures 30. Therefore, by providing more than two locking structures 30, the locking stability of the pedal 20 and the reinforcing rod 12 on the second ladder foot 11 can be further improved.

[0053] Preferably, a hooking portion 3024 is provided on the inner side of the locking end 3023 of the locking hook 302, that is, the locking end 3023 of the locking hook 302 is provided with a hooking portion 3024 on the opposite side of the guiding inclined surface 3025, and the locking end 3023 hooks the reinforcing rod 12 of the second ladder foot 11 through the hooking portion 3024, and the hooking portion 3024 is arranged in an arc shape, and the arc-shaped hooking portion 3024 has a tendency to bend upward. Therefore, the locking end 3023 of the locking hook 302 improves the matching degree between the hooking portion 3024 and the cylindrical reinforcing rod 12 on the ladder foot by providing the arc-shaped hooking portion 3024, so that the hooking effect between the hooking portion 3024 and the reinforcing rod 12 is more stable, thereby improving the stability of the step 20 when the ladder is unfolded and used, and having higher safety.

[0054] The bottom of the lock structure 30 is provided with a disengagement slope 3022 for abutting against the limiter 3011 of the handle plate 301. The disengagement slope 3022 is gradually inclined upward from the connecting end 3021 and the locking end 3023 of the lock structure 30 to the middle of the lock.

[0055] In actual use, when the user manually presses down the handle plate 301, the bottom of the handle plate 301 presses down the top of the lock hook 302, and the limiter 3011 of the handle plate 301 slides from the locking end 3023 of the lock hook 302 to the connecting end 3021 along the tripping inclined surface 3022, so that the locking end 3023 of the lock hook 302 can follow the handle plate 301 to flip downward and lock the reinforcing rod 12 through the hook connection portion 3024. When the user manually lifts the handle plate 301, as the handle plate 301 continues to flip upward, its limiter 3011 slides from the connecting end 3021 of the lock hook 302 to the locking end 3023 along the tripping inclined surface 3022 until the locking end 3023 is separated from the reinforcing rod 12.

[0056] In this way, the limiting member 3011 at the bottom of the handle plate 301 and the disengaging slope 3022 at the bottom of the locking hook 302 are abutted and assembled, and the limiting member 3011 can be used to generate an upward abutting force on the locking hook 302 by manually lifting the handle plate 301 upwards. Combined with the oblique design of the disengaging slope 3022, the limiting member 3011 slides toward the locking end 3023 of the locking hook 302, driving the locking end 3023 of the locking hook 302 to flip upward to disengage from the reinforcing rod 12 of the ladder foot. The operation is simple and saves physical effort.

[0057] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A folding ladder with quick lock, characterized in that: It comprises a first ladder foot, a second ladder foot, a pedal and a locking structure, wherein the upper ends of the first ladder foot and the second ladder foot are movably connected to each other and the lower ends are supported on the ground, the pedals are provided with a plurality of pieces, and the plurality of pedals are movably provided along the length direction of the first ladder foot and the second ladder foot, and the locking structure comprises a handle plate, a locking hook, a connecting rod and an elastic member; The handle plate is movably connected to the pedal via a connecting rod, the connecting end of the locking hook is movably connected to the handle plate and the pedal via a connecting rod, the handle plate is provided with a limiting member for abutting against the locking hook, and the locking end of the locking hook is used to hook the reinforcing rod of the first ladder foot or the second ladder foot; The elastic member is sleeved on the connecting rod and is elastically connected to the pedal and the locking hook, and is used to hook the locking end of the locking hook onto the reinforcing rod when the handle plate is flipped downward, and to drive the locking end of the locking hook to disengage from the reinforcing rod through the limiting member when the handle plate is flipped upward.

2. The folding ladder with quick lock as claimed in claim 1, characterized in that: The locking end of the locking hook is provided with a hooking portion for hooking the reinforcing rod of the first ladder foot or the second ladder foot, and the hooking portion is arranged in an arc shape.

3. The folding ladder with quick lock as claimed in claim 1, characterized in that: The limiting piece is arranged at the bottom of the handle plate, and a disengaging slope is arranged at the bottom of the locking structure for abutting against the limiting piece of the handle plate. The disengaging slope is gradually inclined upward from the connecting end and the locking end of the locking structure to the middle part of the lock, and is used for the limiting piece to slide back and forth on the disengaging slope when the handle plate is flipped upward or downward.

4. The folding ladder with quick lock as claimed in claim 1, characterized in that: Two or more locking structures are provided, and the two locking structures are arranged in parallel in the length setting direction of the reinforcement rod of the ladder foot and are connected in one piece through a connecting arm; the middle part of the elastic member is connected to the pedal, and the two ends of the elastic member are sleeved on the connecting rod and are connected one by one to the two locking structures arranged in parallel.

5. The folding ladder with quick lock according to any one of claims 1 to 4, characterized in that: One end of the pedal is movably connected to the first ladder foot via a rotating shaft, and the other end of the pedal is supported on the reinforcing rod of the second ladder foot; a locking notch is provided at one end of the pedal supported on the reinforcing rod, and a positioning hook for connecting to the middle part of the elastic member is provided on the edge of the locking notch; The number of connecting rods corresponds to the number of locking structures. Connecting rods are fixedly connected to both sides of the locking notch. One end of the handle plate and the connecting ends of the two locking structures are movably connected to the connecting rods one by one through the opening of axial holes. The locking structure is arranged below the handle plate.

6. The folding ladder with quick lock as claimed in claim 5, characterized in that: One end of the pedal having a locking notch is provided with a positioning groove for matching and engaging with the reinforcing rod of the second ladder foot.

7. The folding ladder with quick lock as claimed in claim 5, characterized in that: The handle plate is provided with a handle at one end away from the connecting rod.

8. The folding ladder with quick lock according to any one of claims 1 to 4, characterized in that: The first ladder foot is configured as a U-shaped structure with an opening toward the ground, and the second ladder foot is composed of two parallel tube feet connected by a plurality of reinforcing rods. The upper end of the second ladder foot is movably connected to the upper end of the first ladder foot and the upper end movable connection is used as a fulcrum for unfolding and supporting or folding and storing.

9. The folding ladder with quick lock according to any one of claims 1 to 4, characterized in that: One end of the pedal is movably connected to the first ladder foot via a pin shaft, and the other end of the pedal is movably connected to the pedals arranged on the upper and lower layers and the pins of the second ladder foot via a connecting plate.

10. The folding ladder with quick lock as claimed in claim 9, characterized in that: A plurality of anti-skid patterns are arranged on the upper surface of the pedal.

Images