Foldable and retractable handrail structure of ladder

Abstract

The utility model relates to a foldable and telescopic handrail structure of a ladder, comprising a handrail, a connecting pipe and a connecting device, wherein the connecting portion of the handrail is inserted into the connecting pipe through the port of the connecting pipe, the connecting portion and the connecting pipe are movably connected, and the connecting portion moves along the connecting pipe to control the telescopic state of the handrail; a telescopic state locking device for locking or releasing the telescopic state of the handrail is also provided between the handrail and the connecting pipe; the connecting device comprises an upper connecting piece and a lower connecting piece for fixing on the ladder, the upper connecting piece and the lower connecting piece are hinged together, and the stability and safety of the handrail in use are ensured by providing a telescopic state locking device between the handrail and the connecting pipe. Whether climbing on the ladder or sitting down to rest, reliable support can be provided, reducing the risk of accidental sliding or loosening during use.

Description

Technical Field

[0001] The utility model relates to a foldable and telescopic handrail structure of a ladder. Background Art

[0002] Ladders are widely used tools in daily life and work, especially in the fields of construction, decoration and home maintenance. In order to ensure the safety of users, the existing technology stipulates that ladders must be equipped with handrails after reaching a specified height. Ladders equipped with handrails can improve the safety factor when climbing and reduce the probability of accidents. However, there are some shortcomings in the handrail design on the market, which are mainly manifested in the following aspects:

[0003] Fixed structure, large storage volume: Most ladders with handrails currently have the handrail structure fixed to the front leg tube as a whole. When the ladder is in the folded state, the handrail cannot be folded up, resulting in an increase in the packaging and storage volume of the ladder. This not only increases the storage space requirements, but also increases the transportation cost.

[0004] Different armrest sizes: The armrest sizes on the market vary. Some meet the standard size requirements (up to 600mm, above the human knee), some meet the human backrest requirements, and some meet the folding requirements. However, it is difficult to find an armrest structure that can meet all of the above requirements at the same time.

[0005] Poor comfort: The handrails of some ladders are not comfortable when used as backrests or seats, and cannot meet the needs of users working for long periods of time. Utility Model Content

[0006] The utility model aims to provide a foldable and telescopic armrest structure which realizes the folding and telescopic functions of the armrest, thereby minimizing the packaging volume and reducing the transportation and storage costs.

[0007] The purpose of the utility model is achieved in this way:

[0008] A foldable and retractable handrail structure of a ladder comprises a handrail, a connecting pipe and a connecting device, wherein a connecting portion of the handrail passes through a port of the connecting pipe and is inserted into the connecting pipe, the connecting portion and the connecting pipe are movably connected, and the connecting portion moves along the connecting pipe to control the retractable state of the handrail;

[0009] A telescopic state locking device for locking or releasing the telescopic state of the armrest is also provided between the armrest and the connecting pipe;

[0010] The connecting device comprises an upper connecting piece and a lower connecting piece for fixing on the ladder, the upper connecting piece and the lower connecting piece are hinged together, the upper connecting piece rotates with the hinge as the rotation center, and the connecting pipe is connected to the upper connecting piece;

[0011] A rotation state locking device for locking or releasing the rotation state of the upper connecting member is also arranged between the upper connecting member and the lower connecting member.

[0012] By setting a telescopic state locking device between the handrail and the connecting pipe, the stability and safety of the handrail in use are ensured. Whether climbing on the ladder or sitting down to rest, it can provide reliable support and reduce the risk of accidental sliding or loosening during use.

[0013] The handrail can not only be used as support when climbing, but can also be converted into a backrest or seat when the ladder is opened. The handrail is movably connected to the connecting pipe through the connecting part, and can be telescopically adjusted along the connecting pipe to achieve multi-level height adjustment. Whether it is users of different heights or different usage scenarios, the height of the handrail can be flexibly adjusted to improve convenience.

[0014] The upper and lower connecting parts are connected by hinges and a rotation state locking device is provided, so that the handrails can be folded and stowed when not in use, reducing the overall volume of the ladder. The folded ladder takes up less space during packaging, transportation and storage, greatly reducing logistics costs and storage requirements.

[0015] Users can easily retract, fold and unfold the armrests without complicated tools and steps, which improves the user experience of the product.

[0016] The purpose of the utility model can also be solved by the following technical measures:

[0017] Furthermore, the telescopic state locking device comprises a seat body, a first locking pin and a first spring, the connecting part is a hollow tube body, and a first through hole is formed on an outer wall of the connecting part;

[0018] The seat body is provided with a receiving cavity, and the seat body is placed in the inner cavity of the connecting part;

[0019] The first spring and the first lock pin are placed in the accommodating cavity, the first lock pin passes through the first through hole and extends toward the first spring, and the first spring constitutes a reset mechanism of the first lock pin;

[0020] The outer wall of the connecting pipe is provided with second through holes at intervals;

[0021] When the first locking pin passes through the first through hole and is inserted into the corresponding second through hole, the armrest and the connecting pipe are in a locked state, and when the locking pin leaves the second through hole, the armrest and the connecting pipe are in an unlocked state.

[0022] The user only needs to press the first locking pin to lock and unlock the armrest, without the need for additional tools, and the operation is simple and quick.

[0023] When the first locking pin passes through the first through hole and is inserted into the corresponding second through hole, the armrest and the connecting pipe are in a locked state, thereby ensuring the stability and safety of the armrest during use.

[0024] The first spring serves as a reset mechanism for the first lock pin. When the armrest and the connecting pipe are unlocked and the first lock pin is moved to a suitable position and aligned with the second through hole, the first lock pin will automatically reset to its initial position, making it easier for the first lock pin to be inserted into the corresponding second through hole.

[0025] The outer wall of the connecting pipe is provided with a plurality of second through holes, and the user can adjust the height of the armrest according to the needs. The first locking pin can be inserted into different second through holes to achieve locking at different heights, thus meeting various usage requirements.

[0026] The first lock pin and the first spring are placed in the accommodating cavity, which reduces the impact of the external environment, reduces wear and failure rate, and prolongs the service life.

[0027] Furthermore, the armrest is provided with foam for increasing comfort.

[0028] Foam is placed on the armrests. When the armrests are used as backrests, the foam material can provide soft and comfortable support, effectively reducing the discomfort caused by the body contacting hard surfaces.

[0029] Foam has a good cushioning effect, which can evenly disperse body pressure, reduce the burden on the waist and back when leaning back for a long time, relieve fatigue and improve comfort.

[0030] The foam material has certain anti-slip properties, which can provide better support and stability when the user leans back, prevent the body from sliding, and improve safety.

[0031] Foam has good thermal insulation properties, especially in cold environments, which can effectively prevent the backrest surface from becoming too cold, making the user feel warmer and more comfortable when using it.

[0032] The beneficial effects of the utility model are as follows:

[0033] The utility model provides an armrest that can not only be used as a support when climbing, but can also be converted into a backrest or a seat when the ladder is in the open state. The armrest is movably connected to the connecting pipe through the connecting part, and can be telescopically adjusted along the connecting pipe to achieve multi-level height adjustment. Whether it is users of different heights or different usage scenarios, the height of the armrest can be flexibly adjusted to improve the convenience of use.

[0034] The utility model has an upper connecting piece and a lower connecting piece connected by a hinge, and a rotation state locking device is provided, so that the handrail can be folded and stored when not in use, thereby reducing the overall volume of the ladder. The folded ladder takes up less space during packaging, transportation and storage, greatly reducing logistics costs and storage requirements.

[0035] The utility model allows users to easily extend, fold and unfold the armrest without complicated tools and steps, thus improving the user experience of the product.

[0036] The utility model has a newly designed folding and rotating armrest structure that can be folded and rotated when not in use, effectively reducing the volume occupied by the armrest during packaging. This optimization can reduce the space requirements during transportation and storage, significantly reduce related packaging materials and costs, and because of the reduction in packaging volume, the space occupied by the product during transportation is reduced, which can greatly reduce transportation costs. This not only helps to improve the market competitiveness of the product, but also can save a lot of operating expenses for the enterprise. In addition, the folding and rotating design greatly reduces the space required for the armrest when storing, and it can be more conveniently stored in retail stores or users' homes, which is convenient for consumers to use and manage. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the ladder (handrail rotated to the handrail state position).

[0038] Figure 2 Schematic diagram of the ladder (armrest rotated to backrest position).

[0039] Figure 3 Schematic diagram of the ladder in the folded state.

[0040] Figure 4 A schematic diagram of a foldable and retractable handrail structure of a ladder.

[0041] Figure 5 The present invention is an exploded view of a locking device for a telescopic state of a foldable and telescopic handrail structure of a ladder. DETAILED DESCRIPTION

[0042] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0043] Example, combined with Figures 1 to 5 As shown, a foldable and retractable handrail structure of a ladder comprises a handrail 1, a connecting pipe 2 and a connecting device 3, wherein a connecting portion 11 of the handrail 1 passes through a port of the connecting pipe 2 and is inserted into the connecting pipe 2, the connecting portion 11 and the connecting pipe 2 are movably connected, and the connecting portion 11 moves along the connecting pipe 2 to control the retractable state of the handrail 1;

[0044] A telescopic state locking device 4 for locking or releasing the telescopic state of the armrest 1 is also provided between the armrest 1 and the connecting pipe 2;

[0045] The connecting device 3 includes an upper connecting member 31 and a lower connecting member 32 for fixing on the ladder 7, the upper connecting member 31 and the lower connecting member 32 are hinged together, the upper connecting member 31 rotates around the hinge as the rotation center, and the connecting pipe 2 is connected to the upper connecting member 31;

[0046] A rotation state locking device 5 for locking or releasing the rotation state of the upper connecting member 31 is further provided between the upper connecting member 31 and the lower connecting member 32 .

[0047] Furthermore, the telescopic state locking device 4 includes a seat body 41, a first locking pin 42 and a first spring 43, the connecting portion 11 is a hollow tube, and a first through hole 12 is opened on the outer wall of the connecting portion 11;

[0048] The seat body 41 is provided with a receiving cavity, and the seat body 41 is placed in the inner cavity of the connecting portion 11;

[0049] The first spring 43 and the first lock pin 42 are placed in the accommodating cavity, the first lock pin 42 passes through the first through hole 12 and extends toward the first through hole 12, and the first spring 43 constitutes a reset mechanism of the first lock pin 42;

[0050] The outer wall of the connecting pipe 2 is spaced apart with second through holes 21;

[0051] When the first locking pin 42 passes through the first through hole 12 and is inserted into the corresponding second through hole 21 , the armrest 1 and the connecting pipe 2 are in a locked state; when the first locking pin 42 leaves the second through hole 21 , the armrest 1 and the connecting pipe 2 are in an unlocked state.

[0052] Furthermore, the armrest 1 is covered with foam 6 for increasing comfort.

[0053] Working principle:

[0054] Telescopic adjustment of armrest 1:

[0055] The user presses the first locking pin 42 to make the first locking pin 42 leave the second through hole 21. At this time, the connecting part 11 and the connecting tube 2 are in an unlocked state, and the connecting part 11 can be freely extended and retracted, thereby adjusting the telescopic state of the armrest 1. When the telescopic state of the armrest 1 is adjusted, the first spring 43 resets and pushes the first locking pin 42 to insert into the second through hole 21 corresponding to the connecting tube 2. At this time, the connecting part 11 and the connecting tube 2 are in a locked state, thereby locking the telescopic state of the armrest 1.

[0056] Since the first spring 43 serves as a reset mechanism for the first lock pin 42, when the armrest 1 and the connecting pipe 2 are unlocked, when the first lock pin 42 moves to a suitable position and aligns with the second through hole 21, the first lock pin 42 will automatically reset to its initial position, making it easier for the first lock pin 42 to be inserted into the corresponding second through hole 21.

[0057] Position adjustment of armrest 1:

[0058] The user releases the rotational state lock of the upper connecting member 31 through the rotational state locking device. At this time, the upper connecting member 31 is in a free state. The rotation of the upper connecting member 31 drives the armrest 1 to rotate, thereby adjusting the position of the armrest 1 to make the armrest 1 in the armrest state position or the backrest state position.

[0059] When the armrest 1 rotates to the armrest state position, the user locks the current position of the armrest 1 through the rotation state locking device.

[0060] When the armrest 1 rotates to the backrest state, the user locks the current position of the armrest 1 through the rotation state locking device.

Claims

1. A foldable and retractable handrail structure of a ladder, comprising a handrail, a connecting pipe and a connecting device, characterized in that: The connecting part of the handrail passes through the port of the connecting pipe and is inserted into the connecting pipe. The connecting part and the connecting pipe are movably connected. The connecting part moves along the connecting pipe to control the telescopic state of the handrail. A telescopic state locking device for locking or releasing the telescopic state of the armrest is also provided between the armrest and the connecting pipe; The connecting device comprises an upper connecting piece and a lower connecting piece for fixing on the ladder, the upper connecting piece and the lower connecting piece are hinged together, the upper connecting piece rotates with the hinge as the rotation center, and the connecting pipe is connected to the upper connecting piece; A rotation state locking device for locking or releasing the rotation state of the upper connecting member is also arranged between the upper connecting member and the lower connecting member.

2. The foldable and retractable handrail structure of the ladder according to claim 1, characterized in that: The telescopic state locking device comprises a seat body, a first locking pin and a first spring, the connecting part is a hollow tube body, and a first through hole is formed on the outer wall of the connecting part; The seat body is provided with a receiving cavity, and the seat body is placed in the inner cavity of the connecting part; The first spring and the first lock pin are placed in the accommodating cavity, the first lock pin passes through the first through hole and extends toward the first spring, and the first spring constitutes a reset mechanism of the first lock pin; The outer wall of the connecting pipe is spaced apart with second through holes; When the first locking pin passes through the first through hole and is inserted into the corresponding second through hole, the armrest and the connecting pipe are in a locked state, and when the locking pin leaves the second through hole, the armrest and the connecting pipe are in an unlocked state.

3. The foldable and retractable handrail structure of a ladder according to claim 1, characterized in that: The armrest is provided with foam for increasing comfort.

Images