Locking mechanism for folding ladder
By introducing a combined structure of hook and pin into the locking mechanism of the folding ladder, the secondary locking effect is achieved, solving the problem of insufficient locking in the prior art, and significantly improving safety performance and stability.
Patent Information
- Application Number
- CN202420768959.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-04-15
AI Technical Summary
The locking mechanism of the existing folding ladder has only one locking structure, which is prone to decoupling, resulting in insufficient safety performance.
A locking mechanism including front support feet, rear support feet, pedals and connecting rods is designed. The combined structure of hooks and latches is adopted to achieve secondary locking through the blocking action of the latches to ensure stable locking of the connecting rods and pedals.
By adding the locking structure of the pin, the phenomenon of disengagement is avoided, the safety performance of the locking mechanism is improved, and the stability and reliability during use are ensured.
Smart Images
Figure CN222759710U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a locking mechanism for a folding ladder. Background Art
[0002] Folding ladders are commonly used climbing tools in daily life and work. In the ladders disclosed in the existing patent technical documents, a hook is fixed on the rotating pedal, and the hook is detachably connected to the support rod. When gradually unfolding, the connecting rod is linked by the rear support frame to drive the pedal to flip down. When fully unfolded, the pedal is basically horizontal, and the hook is engaged with the support rod. The above locking mechanism is an interference lock, and there is only one locking structure, which may cause the hook to be unhooked. Utility Model Content
[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a locking mechanism for a folding ladder which has a reasonable structural design and is stable and reliable in use.
[0004] The technical solution adopted by the utility model to solve the above problems is:
[0005] The locking mechanism for a folding ladder comprises a pair of front supporting legs and a pair of rear supporting legs, the front supporting legs are rotatably connected to the rear supporting legs, a pedal is rotatably connected between the two front supporting legs, and a connecting rod is fixedly connected between the two rear supporting legs. When the folding ladder is in use, the connecting rod supports the pedal. The locking mechanism also comprises a connecting mechanism, the connecting mechanism comprises a hook that can hook the connecting rod, the hook has a hook opening for the connecting rod to enter and exit the hook, and a latch member is provided on the outer side of the hook opening to prevent the connecting rod in the hook from detaching from the hook, the latch member is slidably connected to the hook, and when the latch member moves to a position away from the hook opening, the blocking of the connecting rod by the latch member is eliminated; when the latch member moves to a position close to the hook opening, the latch member is located below the connecting rod, the blocking of the connecting rod by the latch member is activated, and the hook is connected to the pedal.
[0006] Among them, the outer sleeve of the latch piece is provided with a sliding sleeve, the latch piece is slidably connected to the sliding sleeve, the hook is fixedly connected to the sliding sleeve, the latch piece is connected to an elastic piece, the elastic piece exerts a force on the latch piece to move away from the hook mouth; the latch piece is connected to an elastic jumping bead, the sliding sleeve is provided with a first hole position for the elastic jumping bead to fall into, when the elastic jumping bead falls into the first hole position, the sliding sleeve and the latch piece remain fixed; when the elastic jumping bead leaves the first hole position, the latch piece moves away from the hook mouth position under the action of the elastic piece.
[0007] One end of the sliding sleeve is provided with an end surface, and one end of the end surface is provided with a first empty space for the latch member to pass through.
[0008] Among them, there is a cavity in the latch part, the jumping bead is a V-shaped jumping bead, and the V-shaped jumping bead is arranged in the cavity. Second holes for the jumping bead to pass through are arranged on both sides of the latch part, and the sliding sleeve is provided with two corresponding first holes. When the V-shaped jumping bead is in the second hole position and the first hole position, the latch part and the sliding sleeve are fixed.
[0009] Wherein, the sliding sleeve is rotatably connected with the pedal.
[0010] The rotation of the sliding sleeve is blocked and restricted by the pedal.
[0011] Wherein, the connecting rod and the hook are hooked firmly under the interference effect.
[0012] Compared with the prior art, the utility model has the following advantages and effects: the connection mechanism adopted in the present application adds a locking structure of the latch member 41 on the basis of the original interference locking structure, which can avoid the disengagement situation, adopts a two-locking structure, and the safety performance is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0014] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.
[0015] Embodiment 1
[0016] like Figure 1As shown, a locking mechanism for a ladder, a locking mechanism for a folding ladder, comprises a pair of front supporting legs 1 and a pair of rear supporting legs 2, the front supporting legs 1 are rotatably connected to the rear supporting legs 2, a pedal 3 is rotatably connected between the two front supporting legs 1, and a connecting rod 21 is fixedly connected between the two rear supporting legs 2. When the folding ladder is in use, the connecting rod 21 supports the pedal 3, and also comprises a connecting mechanism, the connecting mechanism comprises a hook 4 that can hook the connecting rod 21, the hook 4 has a hook opening for the connecting rod 21 to enter and exit the hook 4, and a latch member 41 is provided on the outer side of the hook opening to prevent the connecting rod 21 in the hook 4 from escaping from the hook 4, the latch member 41 is slidably connected to the hook 4, when the latch member 41 moves to a position away from the hook opening, the blocking of the connecting rod 21 by the latch member 41 is eliminated; when the latch member 41 moves to a position close to the hook opening, the blocking of the connecting rod 21 by the latch member 41 is started, and the hook 4 is connected to the pedal 3. In this embodiment, when the folding ladder is in use, the pedal 3 is placed on the connecting rod 21, the hook 4 is hooked to the connecting rod 21, and the latch 41 is close to the hook mouth, and the latch 41 is under the connecting rod 21, so as to achieve secondary locking. When the hook 4 and the connecting rod 21 are to be separated, the latch 41 is away from the hook mouth, and the latch 41 is withdrawn from under the connecting rod 21, and the hook 4 and the connecting rod 21 can be separated.
[0017] As a preferred embodiment, the latch member 41 is provided with a sleeve 42, the latch member 41 is slidably connected to the sleeve 42, the hook 4 is fixedly connected to the sleeve 42, the latch member 41 is connected to an elastic member 44, and the elastic member 44 exerts a force on the latch member 41 to move away from the hook mouth; the latch member 41 is connected to an elastic jump bead 43, and the sleeve 42 is provided with a first hole 420 for the elastic jump bead 43 to fall into, when the elastic jump bead 43 falls into the first hole 420, the sleeve 42 and the latch member 41 remain fixed; when the elastic jump bead 43 is separated from the first hole 420, the latch member 41 is moved away from the hook mouth under the action of the elastic member 44. In this embodiment, the elastic member 44 is a spring, and the spring exerts a force on the latch member 41 to withdraw. When the latch member 41 extends to the bottom of the connecting rod 21 and is locked, the spring accumulates energy, and after the elastic jumping bead 43 falls into the first hole 420, the sliding sleeve 42 and the latch member 41 remain fixed, thereby maintaining a locked state; when unlocking is required, the elastic jumping bead 43 is pressed, the elastic jumping bead 43 retracts, and the latch member 41 withdraws to release the lock.
[0018] As a preferred embodiment, an end surface is provided at one end of the sliding sleeve 42, and a first empty space for the latch member 41 to pass through is provided at one end of the end surface.
[0019] As a preferred embodiment, the latch member 41 has a cavity 410, the jumping bead 43 is a V-shaped jumping bead 43, the V-shaped jumping bead 43 is arranged in the cavity 410, the two sides of the latch member 41 are provided with second holes 430 for the jumping bead 43 to pass through, the sliding sleeve 42 is provided with two corresponding first holes 420, and when the V-shaped jumping bead 43 is in the second hole 430 and the first hole 420, the latch member 41 is fixed to the sliding sleeve 42. When the elastic jumping bead 43 falls into the first hole 420 and the second hole 430 at the same time, the sliding sleeve 42 and the latch member 41 remain fixed, thereby maintaining the locked state; when unlocking is required, the elastic jumping bead 43 is pressed, the elastic jumping bead 43 retracts, and the latch member 41 withdraws to release the lock.
[0020] As a preferred embodiment, the sliding sleeve 42 is rotatably connected to the pedal 3 .
[0021] As a preferred embodiment, the rotation of the sliding sleeve 42 is blocked and limited by the pedal 3 .
[0022] As a preferred embodiment, the connecting rod 21 and the hook 4 are hooked firmly under the interference effect.
[0023] The above contents described in this specification are merely examples of the present utility model. Those skilled in the art of the present utility model may make various modifications or additions to the specific embodiments described, or replace them in similar ways, as long as they do not deviate from the contents of the present utility model specification or exceed the scope defined in the claims, they shall all fall within the protection scope of the present utility model.
Claims
1. A locking mechanism for a folding ladder, comprising a pair of front supporting legs and a pair of rear supporting legs, wherein the front supporting legs are rotatably connected to the rear supporting legs, a pedal is rotatably connected between the two front supporting legs, and a connecting rod is fixedly connected between the two rear supporting legs, wherein when the folding ladder is in use, the connecting rod supports the pedal, and is characterized in that: The invention also comprises a connecting mechanism, wherein the connecting mechanism comprises a hook which can hook the connecting rod, the hook having a hook opening for the connecting rod to enter and exit the hook, and a latch member which blocks the connecting rod in the hook from escaping from the hook is arranged on the outer side of the hook opening, the latch member is slidably connected to the hook, and when the latch member moves to a position away from the hook opening, the blocking of the connecting rod by the latch member is eliminated; when the latch member moves to a position close to the hook opening, the latch member is located under the connecting rod, the blocking of the connecting rod by the latch member is activated, and the hook is connected to the pedal.
2. The locking mechanism for a folding ladder according to claim 1, characterized in that: The latch member is provided with a sliding sleeve on its outer cover, the latch member is slidably connected to the sliding sleeve, the hook is fixedly connected to the sliding sleeve, the latch member is connected to an elastic member, and the elastic member exerts a force on the latch member to move away from the hook mouth; The latch piece is connected to an elastic jumping bead, and the sliding sleeve is provided with a first hole position for the elastic jumping bead to fall into. When the elastic jumping bead falls into the first hole position, the sliding sleeve and the latch piece remain fixed; when the elastic jumping bead is separated from the first hole position, the latch piece is away from the hook mouth position under the action of the elastic piece.
3. The locking mechanism for a folding ladder as claimed in claim 2, characterized in that: One end of the sliding sleeve is provided with an end surface, and one end of the end surface is provided with a first empty space for the latch member to pass through.
4. The locking mechanism for a folding ladder as claimed in claim 2, characterized in that: The latch member has a cavity inside, and the jumping bead is a V-shaped jumping bead. The V-shaped jumping bead is arranged in the cavity. Second holes for the jumping bead to pass through are arranged on both sides of the latch member, and the sliding sleeve has two corresponding first holes. When the V-shaped jumping bead is in the second hole position and the first hole position, the latch member is fixed to the sliding sleeve.
5. The locking mechanism for a folding ladder according to claim 1, characterized in that: The sliding sleeve is rotatably connected with the pedal.
6. The locking mechanism for a folding ladder as claimed in claim 5, characterized in that: The rotation of the sliding sleeve is blocked and limited by the pedal.
7. The locking mechanism for a folding ladder according to claim 1, characterized in that: The connecting rod and the hook are hooked firmly under the interference effect.