CN2747972Y

CN2747972Y - Folding step stool

Info

Publication number: CN2747972Y
Application number: CNU2004200517058U
Authority: CN
Inventors: 冷鹭浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-15
Filing date: 2004-06-15
Publication date: 2005-12-28
Anticipated expiration: 2014-06-15
Also published as: WO2005122837A1

Abstract

The utility model relates to a folding step stool adopting the following technology scheme: a folding step stool comprises a front leg component, a back leg component, an inclined drawing rod component and a pedal component in connection to form a hinging four-bar mechanism. The hinging four-bar mechanism is provided with a position-limit mechanism limiting the hinging four-bar mechanism to be folded in the open state. The folding step stool of the utility model realizes the expansion or folding by the hinging four-bar mechanism. When the folding step stool is expanded to the preset position, the folding of the hinging four-bar mechanism is limited by the position-limit mechanism and the folding step stool is in the expansion state which is an open working state.

Description

A kind of collapsible step stool

Technical field

The utility model relates to a kind of step stool, particularly relates to a kind of collapsible step stool.

Background technology

Existing step stool generally comprises two forelegs, two back legs and a pedal; The upper end of two forelegs is fixedly connected with the upper end of two back legs respectively; Be fixed with a pedal between two forelegs and two back legs.Though existing step stool has the function of step stool, it also has following shortcoming: the step stool of prior art is not collapsible, takes up room greatly, carries inconvenience, stores inconvenience.

The utility model content

The purpose of this utility model is to overcome above-mentioned shortcoming, provides a kind of and opens, folding convenient, safe and reliable collapsible step stool.

The utility model adopts following technical scheme: a kind of collapsible step stool, comprise foreleg assembly, rear leg assemblies, brace assembly and pedal assembly, described foreleg assembly, rear leg assemblies, brace assembly and pedal assembly connection also constitute a hinged quadric chain; Described hinged quadric chain is provided with and can limits the position-limit mechanism that hinged quadric chain is folded in being in open mode.

The front rail that foreleg assembly described in the utility model comprises two forelegs and is fixedly linked in two forelegs upper end; Rear leg assemblies comprises two back legs; The brace assembly comprises two braces; Two forelegs upper end turns respectively and is connected in pedal assembly front end left and right sides side, two back legs upper end turns respectively and is connected in the left and right sides, pedal assembly rear end side, one brace front and back end turns respectively and is connected in a foreleg top and a back leg middle and lower part, and another brace front and back end turns respectively and is connected in another foreleg top and another back leg middle and lower part.

Position-limit mechanism described in the utility model is arranged on the front rail, and position-limit mechanism cooperates mechanism that can prevent to fold of formation with pedal assembly.

The angle that pedal assembly described in the utility model and foreleg assembly are formed is greater than 90 °, and the angle that pedal assembly and rear leg assemblies are formed is greater than 90 °.

Position-limit mechanism described in the utility model has and is installed in buckling on the front rail, buckles to have elastic fastening hook, and elastic fastening hook is provided with barb.

Elastic fastening hook described in the utility model is the grab of working of plastics or the grab that is bent into the sheet metal component of barb.

Pedal assembly described in the utility model comprises two keepers that are abutted against the pedal on front rail and are installed in pedal left and right sides side respectively, pedal has hole clipping, the position of hole clipping is corresponding to the position of position-limit mechanism, hole clipping is provided with the flange that is matched with barb, and the barb of position-limit mechanism cooperates mechanism that prevents to fold of formation with the flange of pedal assembly.

The rotatable respectively front end that is connected in two keepers of pedal assembly in two forelegs described in the utility model upper end, the rotatable respectively rear end that is connected in two keepers of pedal assembly, two back legs upper end.

Foreleg assembly described in the utility model also comprises one or several following pedals that are fixed between two forelegs; Rear leg assemblies also comprises the auxiliary cross bar that is fixed between two back legs.

The upper end of two back legs of rear leg assemblies described in the utility model upwards extends back into two auxiliary frames, is fixed with handrail between the upper end of two auxiliary frames.

By above-mentioned description to the utility model structure as can be known, compare, the utlity model has following advantage with background technology:

One, step stool of the present utility model is realized launching or folding by hinged quadric chain, when being deployed into the precalculated position, limited the folding of hinged quadric chain by position-limit mechanism, made hinged quadric chain be in stable state, step stool was in deployed condition and promptly opened duty this moment;

They are two years old, step stool of the present utility model, the position-limit mechanism that is arranged on the front rail cooperates mechanism that can prevent to fold of formation with pedal assembly, by limiting the rotation between pedal assembly and the foreleg assembly, define the folding of hinged quadric chain, it is convenient to open or lock position-limit mechanism, locks spacing solid and reliablely, and the user uses this step stool safe;

They are three years old, step stool of the present utility model, the angle that pedal assembly and foreleg assembly are formed is greater than 90 °, the angle that pedal assembly and rear leg assemblies are formed is greater than 90 °, and hinged quadric chain hinged general hinged by rivet is when hinged quadric chain is subjected to downward pressure, Stability Analysis of Structures, each hinged place only is subjected to the effect of pulling force, and the rivet gap is eliminated, and is difficult for loosening;

Its four, step stool of the present utility model, the barb of position-limit mechanism cooperate with the flange of pedal assembly and constitute a mechanism that prevents to fold, it is convenient to open or lock position-limit mechanism, locks spacing solid and reliable;

Its five, step stool of the present utility model, elastic fastening hook are the grab of working of plastics or the grab that is bent into the sheet metal component of barb, easily manufactured, production cost is low;

Its six, step stool of the present utility model, pedal assembly have two keepers, the intensity height is convenient with connecting between foreleg assembly, the rear leg assemblies;

Its seven, step stool of the present utility model, foreleg assembly also comprise down pedal, the user is by climbing up pedal again behind the pedal down, and is easy to use, safe, and the user can reach higher position;

Its eight, step stool of the present utility model, the foreleg assembly also comprises two auxiliary frames and handrail, the user is easy to use, and is when climbing up step stool, safe.

Description of drawings

Accompanying drawing 1 is in the perspective view of deployed condition for step stool of the present utility model;

Accompanying drawing 2 is in the schematic diagram of deployed condition for step stool of the present utility model;

Accompanying drawing 3 is looked schematic diagram for a right side of step stool of the present utility model;

Accompanying drawing 4 is the A-A cross-sectional schematic of accompanying drawing 3;

Accompanying drawing 5 is that step stool of the present utility model is in the perspective view in the folding process;

Accompanying drawing 6 is in the perspective view of folded state for step stool of the present utility model;

Accompanying drawing 7 is the schematic perspective view of foreleg assembly of the present utility model;

Accompanying drawing 8 is the schematic perspective view of rear leg assemblies of the present utility model;

Accompanying drawing 9 is the perspective exploded view of pedal assembly of the present utility model;

Accompanying drawing 10 is the schematic perspective view of position-limit mechanism of the present utility model.

The specific embodiment

Be further described below in conjunction with 1,2,3,4,5,6,7,8,9,10 pairs of the utility model of accompanying drawing.

A kind of collapsible step stool shown in Fig. 1,2,3,4,5,6, comprises foreleg assembly 1, rear leg assemblies 2, brace assembly 3 and pedal assembly 4.Foreleg assembly 1, rear leg assemblies 2, brace assembly 3 and pedal assembly 4 connections also constitute a hinged quadric chain.Hinged quadric chain is provided with the position-limit mechanism 5 that can prevent that hinged quadric chain is folded in being in open mode.

As shown in Figure 7, foreleg assembly 1 comprises two forelegs 11, front rail 12 and following pedal 13.The upper end of two forelegs 11 all extends back into hook-shape body 111.The two ends, the left and right sides of front rail 12 are fixedly linked between two forelegs, 11 upper ends.Following pedal 13 left and right sides are fixedly linked between two forelegs, 11 middle parts.

As shown in figure 10, position-limit mechanism 5 comprise fixedly sleeved in the middle of front rail 12 fixed cover 51 and the upper surface of fixed cover 51 extend upward form buckle 52.Buckle and have elastic fastening hook 521 on 52, elastic fastening hook 521 is provided with barb 5211.The upper surface of fixed cover 51 also extends upward to two auxiliary members 511.Buckle 52 between two auxiliary members 511, buckle the height that 52 height is higher than two auxiliary members 511.Position-limit mechanism 5 forms for the working of plastics manufacturing.

As shown in Figure 8, rear leg assemblies 2 comprises two back legs 21, auxiliary cross bar 22.The two ends, the left and right sides of auxiliary cross bar 22 are fixedly linked between two back legs, 21 middle parts.The upper end of two back legs 21 upwards extends back between the upper end of two auxiliary frames, 23, two auxiliary frames 23 and is fixed with handrail 24.

Brace assembly 3 comprises two braces 31.

As shown in Figure 9, pedal assembly 4 comprises pedal 41 and two keepers 42.The lower surface indent of pedal 41, thus the side of pedal 41 becomes frame.42 one-tenth of two keepers are L shaped.Two keepers 42 fixedly are abutted against respectively in pedal 41 left and right sides sides.The rearward end of two keepers 42 stretches out in the rearward end of pedal 41.Be abutted against on front rail 12 front portion of pedal 41.Pedal 41 has hole clipping 411, and the position of hole clipping 411 is corresponding to the position of position-limit mechanism 5.The periphery of hole clipping 411 extends into positioning sleeve 4112 downwards.Positioning sleeve 4112 medial surfaces are provided with the flange 4111 that is matched with barb 5211, and the barb 5211 of position-limit mechanism 5 cooperates mechanism that prevents to fold of formation with the flange 4111 of pedal assembly 4.

Shown in Fig. 1,2,3,4,5,6, two forelegs, 11 upper ends turn the front end of two keepers 42 that are connected in pedal assembly 4 respectively by rivet.Two back legs, 21 upper ends turn the rear end of two keepers 42 that are connected in pedal assembly 4 respectively by rivet.One brace, 31 front and back ends turn by rivet respectively and are connected in a foreleg 11 tops and a back leg 21 middle and lower parts, and another brace 31 front and back ends turn by rivet respectively and are connected in another foreleg 11 tops and another back leg 21 middle and lower parts.

When being in open mode, the angle that pedal assembly 4 and foreleg assembly 1 are formed is greater than 90 °, and the angle that pedal assembly 4 and rear leg assemblies 2 are formed is greater than 90 °.

The above, it only is the utility model preferred embodiment, so can not limit the scope that the utility model is implemented with this, i.e. the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims

1, a kind of collapsible step stool comprises foreleg assembly, rear leg assemblies, brace assembly and pedal assembly, it is characterized in that: described foreleg assembly, rear leg assemblies, brace assembly and pedal assembly connection also constitute a hinged quadric chain; Described hinged quadric chain is provided with and can limits the position-limit mechanism that hinged quadric chain is folded in being in open mode.

2, collapsible step stool according to claim 1 is characterized in that: the front rail that described foreleg assembly comprises two forelegs and is fixedly linked in two forelegs upper end; Rear leg assemblies comprises two back legs; The brace assembly comprises two braces; Two forelegs upper end turns respectively and is connected in pedal assembly front end left and right sides side, two back legs upper end turns respectively and is connected in the left and right sides, pedal assembly rear end side, one brace front and back end turns respectively and is connected in a foreleg top and a back leg middle and lower part, and another brace front and back end turns respectively and is connected in another foreleg top and another back leg middle and lower part.

3, collapsible step stool according to claim 2, it is characterized in that: described position-limit mechanism is arranged on the front rail, and position-limit mechanism cooperates mechanism that can prevent to fold of formation with pedal assembly.

4, according to claim 2 or 3 described collapsible step stools, it is characterized in that: the angle that described pedal assembly and foreleg assembly are formed is greater than 90 °, and the angle that pedal assembly and rear leg assemblies are formed is greater than 90 °.

5, collapsible step stool according to claim 2 is characterized in that: described position-limit mechanism has and is installed in buckling on the front rail, buckles to have elastic fastening hook, and elastic fastening hook is provided with barb.

6, collapsible step stool according to claim 5 is characterized in that: described elastic fastening hook is the grab of working of plastics or the grab that is bent into the sheet metal component of barb.

7, according to claim 1 or 5 or 6 described collapsible step stools, it is characterized in that: described pedal assembly comprises two keepers that are abutted against the pedal on front rail and are installed in pedal left and right sides side respectively, pedal has hole clipping, the position of hole clipping is corresponding to the position of position-limit mechanism, hole clipping is provided with the flange that is matched with barb, and the barb of position-limit mechanism cooperates mechanism that prevents to fold of formation with the flange of pedal assembly.

8, collapsible step stool according to claim 6 is characterized in that: the rotatable respectively front end that is connected in two keepers of pedal assembly in described two forelegs upper end, the rotatable respectively rear end that is connected in two keepers of pedal assembly, two back legs upper end.

9, collapsible step stool according to claim 2 is characterized in that: described foreleg assembly also comprises one or several following pedals that are fixed between two forelegs; Rear leg assemblies also comprises the auxiliary cross bar that is fixed between two back legs.

10, collapsible step stool according to claim 2 is characterized in that: the upper end of two back legs of described rear leg assemblies upwards extends back into two auxiliary frames, is fixed with handrail between the upper end of two auxiliary frames.