Step ladder

Abstract

The utility model provides a step ladder, which belongs to the technical field of mechanical equipment and comprises a base and a pedal, the base comprises a back plate fixed with a wall body and a limiting bottom plate for limiting the rotation angle of the pedal, and a connecting plate movably connected with the pedal is connected between the limiting bottom plate and the back plate. The connecting plates are oppositely arranged on the two sides of the base and provided with a fixing hole and two positioning holes, a first through hole is formed in the bottom of the pedal, and placing holes are formed in the positions, below the first through hole, of the two opposite sides of the pedal. The first through holes are matched with step ladder shafts, and the pedals are matched with the fixing holes of the two connecting plates through the step ladder shafts to be rotationally fixed. Springs are arranged in the containing holes, steel balls are arranged at the ends, facing the connecting plate, of the springs, and the steel balls extend out of the containing holes to be matched with locating pins arranged in the locating holes, so that rotary locating of the pedal is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment, in particular to a step ladder. Background Art

[0002] In daily life, we often feel annoyed because we are not tall enough, which makes it impossible to pick up objects above us or perform any operations on them.

[0003] In response to the above problem, there are stepladders, folding ladders and the like on the market, which can enable people to climb up, but such ladders still have the disadvantages of being large in size and inconvenient to store. Utility Model Content

[0004] The utility model aims to provide a step ladder, characterized in that it comprises a base and steps, the base comprising an integrally arranged back plate and a limiting bottom plate, the limiting bottom plate being integrally arranged at the bottom end of the back plate and being arranged perpendicular to each other, a connecting plate for enhancing the connection strength being provided between the back plate and the limiting bottom plate, the number of the connecting plates being two, and the two connecting plates being symmetrically arranged on opposite sides of the base;

[0005] The two connecting plates have the same structural setting. Each connecting plate includes a fixing hole and two positioning holes for positioning the pedal rotation angle. A first through hole is provided at the bottom of the pedal, and the through hole is matched with the ladder shaft. The pedal passes through the first through hole through the ladder shaft and the two ends extend into the two fixing holes of the connecting plates on both sides to realize rotational fixation with the base.

[0006] Located below the first through hole, there are placement holes on both sides of the pedal. A spring is provided in the placement hole. A steel ball is provided at one end of the spring facing the connecting plate. The steel ball extends out of the placement hole and cooperates with the positioning hole to realize the rotation positioning of the pedal.

[0007] Furthermore, a positioning pin is provided in the positioning hole, the positioning pin is provided with a second through hole, and the second through hole is provided with an inner chamfer on one end facing the spring for realizing rotational positioning.

[0008] Furthermore, the positioning hole is provided with an inner chamfer for limiting toward one end of the pedal, and the positioning pin extends outward toward one end of the pedal with an extension for matching the limiting function. The extension and the outer periphery of the positioning pin are provided with a slope, and the slope is matched with the surface of the inner chamfer.

[0009] Furthermore, a plurality of anti-slip convex strips are provided on the side of the pedal facing the back plate, and the plurality of convex strips are arranged on the surface of the pedal at equal intervals.

[0010] Furthermore, the back plate is provided with a plurality of threaded through holes for fixing to the wall, and each threaded through hole is provided with a countersunk hole.

[0011] Furthermore, a handle for easy carrying is provided at one end of the pedal away from the limiting base plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in that the step ladder provided by the present invention can be fixed on the wall, opened 90 degrees when in use, and folded back when not in use, which does not take up space and is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a structural schematic diagram of a step ladder when it is folded.

[0014] Figure 2 The utility model is a structural schematic diagram of a step ladder when it is unfolded.

[0015] Figure 3 The utility model is a structural schematic diagram of a base in a step ladder.

[0016] Figure 4 The utility model is a structural schematic diagram of a step in a step ladder.

[0017] Figure 5 The utility model is a structural schematic diagram of a positioning pin in a step ladder.

[0018] Among them, 1. Back plate; 2. Connecting plate; 3. Limiting bottom plate; 4. Pedal; 5. Fixing hole; 6. Positioning hole; 7. Positioning pin; 8. Extension; 9. Steel ball; 10. Raised strip; 11. Handle. DETAILED DESCRIPTION

[0019] The following is a more detailed description of a step ladder of the present invention in conjunction with a schematic diagram, which shows a preferred embodiment of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation to the present invention.

[0020] like Figure 1-4 As shown, a step ladder comprises a base and steps 4. The base comprises a back panel 1 and a limit base 3, which are integrally fixed and perpendicularly arranged. The limit base 3 is fixed to the bottom end of the back panel 1, and the base as a whole has an "L" shape. Connecting plates 2 are provided on opposite sides of the base between the back panel 1 and the limit base 3. These connecting plates 2 enhance the structural strength between the back panel 1 and the limit base 3 and provide a movable connection with the steps 4.

[0021] Specifically, a first through-hole is provided at the bottom of the pedal 4, located below the first through-hole. Mounting holes are provided on opposite sides of the pedal 4. The connecting plates 2 on opposite sides of the base have identical structures, each including a fixing hole 5 and two positioning holes 6. The fixing holes 5 and two positioning holes 6 of the two connecting plates 2 are arranged opposite each other. The pedal 4 and connecting plates 2 are movably connected via a step shaft. The step shaft passes through the first through-hole and its ends extend into the two fixing holes 5 of the two connecting plates 2, respectively. This secures the pedal 4 to the base, allowing the pedal 4 to rotate about the step shaft.

[0022] A spring is placed inside the placement hole of the pedal 4, and a steel ball 9 is placed at the end of the spring facing the connecting plate 2. In cooperation with the steel ball 9, a positioning pin 7 is provided inside each positioning hole 6, and a second through hole is provided inside the positioning pin 7. The second through hole is provided with an inner chamfer facing the end of the steel ball 9 for the steel ball 9 to fall into, thereby realizing the rotational positioning of the pedal 4.

[0023] refer to Figure 5 To prevent the positioning pin 7 from falling through the positioning hole 6, we also provide an inner chamfer on the side of the positioning hole 6 facing the pedal 4. This inner chamfer is used to achieve position limiting. In conjunction with this inner chamfer, the end of the positioning pin 7 extends outward with an extension 8. The extension 8 is connected to the outer periphery of the positioning pin 7 by a slope. The slope is configured to fit with the surface of the inner chamfer. When the positioning pin 7 is subjected to force from the direction of the spring and steel ball 9, the cooperation between the slope and the inner chamfer achieves horizontal position limiting of the positioning pin 7.

[0024] A handle 11 for easy carrying is provided at the top of the pedal 4, that is, the end away from the limiting base plate 3. The handle 11 is specifically a strip-shaped handle 11, and the bottom of the strip-shaped handle 11 is hollowed out for easy use.

[0025] The side of the pedal 4 facing the backboard 1 is provided with multiple anti-slip ridges 10 at equal intervals. When the step ladder is in use, the side of the pedal 4 with multiple ridges 10 faces upward, and the user can step on the ridges 10 to avoid slipping.

[0026] The two positioning holes 6 are used for positioning the pedal 4 in the folded state and in the use state respectively. One positioning hole 6 is located on the horizontal side of the fixing hole 5 for positioning in the use state, and the other positioning hole 6 is located vertically below the fixing hole 5 for positioning in the folded state.

[0027] The original state is the folded state. When the step ladder needs to be used, the pedal is rotated 490° through the handle 11. During the rotation, the steel ball 9 is squeezed toward the spring based on the force of the inner chamfer of the second through hole of the positioning pin 7. The spring is subjected to force and the steel ball 9 retracts into the placement hole; when the pedal 4 is rotated 90°, the placement hole is aligned with the positioning hole 6 located on the side of the fixing hole 5, and the steel ball 9 falls into the inner chamfer of the positioning pin 7 under the action of the spring to achieve positioning.

[0028] On the contrary, when the step ladder needs to be folded, the pedal 4 is manually rotated 90° toward the backboard 1, and the steel ball 9 located at the positioning hole 6 on the side of the fixing hole 5 finally falls into the inner chamfer of the positioning hole 6 at the bottom of the fixing hole 5 to achieve positioning.

[0029] The utility model provides a plurality of threaded through holes on the back plate 1 and uses bolts or screws to fix the back plate 1 on the wall based on the threaded through holes.

[0030] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any way. Any person skilled in the art who, without departing from the scope of the present invention, makes any equivalent substitution, modification, or other variation to the technical solution and technical content disclosed herein shall be deemed to fall within the scope of the present invention and remain within the scope of protection of the present invention.

Claims

1. A step ladder, characterized in that: The pedal comprises a base and a pedal, wherein the base comprises an integral back plate and a limiting bottom plate, wherein the limiting bottom plate is integrally provided at the bottom end of the back plate and is arranged perpendicular to each other, and a connecting plate for strengthening the connection strength is provided between the back plate and the limiting bottom plate, wherein the number of the connecting plates is two, and the two connecting plates are symmetrically provided on opposite sides of the base; The two connecting plates have the same structural arrangement. Each connecting plate includes a fixing hole and two positioning holes for positioning the pedal rotation angle. A first through hole is provided at the bottom of the pedal, and the through hole is matched with a step shaft. The pedal passes through the first through hole through the step shaft and its two ends extend into the two fixing holes of the connecting plates on both sides to achieve rotational fixation with the base. Located below the first through hole, placement holes are provided on both sides of the pedal. A spring is provided in the placement hole. A steel ball is provided at one end of the spring facing the connecting plate. The steel ball extends out of the placement hole and cooperates with the positioning hole to realize the rotational positioning of the pedal.

2. The step ladder according to claim 1, characterized in that: A positioning pin is provided in the positioning hole, and the positioning pin is provided with a second through hole. An end of the second through hole facing the spring is provided with an inner chamfer for achieving rotational positioning.

3. The step ladder according to claim 1, wherein: The positioning hole is provided with an inner chamfer for limiting toward one end of the pedal, and the positioning pin extends outward toward one end of the pedal with an extension for matching the limiting position. The extension and the outer periphery of the positioning pin are provided with a slope, and the slope is matched with the surface of the inner chamfer.

4. The step ladder according to claim 1, wherein: The side surface of the pedal facing the back plate is provided with a plurality of anti-slip convex strips, and the plurality of convex strips are arranged on the surface of the pedal at equal intervals.

5. The step ladder according to claim 1, wherein: The back plate is provided with a plurality of threaded through holes for fixing to the wall, and each threaded through hole is provided with a countersunk hole.

6. The step ladder according to claim 1, characterized in that: The end of the pedal away from the limiting base plate is provided with a handle for easy carrying.

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