Mistaken stepping prevention linkage structure of extension ladder unlocking button

Abstract

The utility model discloses a false stepping prevention linkage structure of an extension ladder unlocking button, which comprises an extension ladder body, and the extension ladder body comprises ladder legs, a bearing pedal transversely arranged between the two ladder legs, the unlocking button and an extension ladder rod telescopically connected to the upper ends of the ladder legs; the ladder is characterized in that a transverse rotating rod is rotationally arranged on the lower portion between the two ladder legs, the transverse rotating rod is in linkage with an unlocking button through a linkage structure, and rotation of the transverse rotating rod can drive the linkage structure to press the unlocking button; when a person goes up the ladder, the linkage structure used for driving the telescopic unlocking button can be prevented from being mistakenly stepped to be unlocked.

Description

Technical Field

[0001] This utility model belongs to the field of telescopic ladders. Background Technology

[0002] Most telescopic ladders on the market are equipped with an unlocking button. The unlocking button is usually located on the lower end of both ends of the steps. When the button is pressed, the locking structure of the telescopic rod is automatically released, thus realizing the telescopic function. However, in the structure of a new type of telescopic ladder with authorization announcement number CN217783381U, the linkage rod is moved downward by stepping on the "connecting rod" to achieve unlocking. Since this structure only requires stepping down on the connecting rod to unlock, there is a risk that if a child or other person on the ground accidentally steps on the "connecting rod" while the worker is working on the ladder, the ladder will automatically unlock and retract, thus posing a risk of accidental fall. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides an anti-accidental stepping linkage structure for the unlocking button of a telescopic ladder, which can prevent the linkage structure used to drive the telescopic unlocking button from being accidentally stepped on and unlocked when a person is climbing the ladder.

[0004] Technical solution: To achieve the above objectives, this utility model provides an anti-accidental stepping linkage structure for the unlocking button of a telescopic ladder, comprising a telescopic ladder body, the telescopic ladder body including ladder legs, a load-bearing step horizontally arranged between the two ladder legs, an unlocking button, and a telescopic ladder rod telescopically connected to the upper end of the ladder legs; characterized in that: a horizontal rotating rod is rotatably arranged at the lower part between the two ladder legs, and the horizontal rotating rod is linked with the unlocking button through a linkage structure, the rotation of the horizontal rotating rod will drive the linkage structure to press the unlocking button.

[0005] Furthermore, an unlocking pedal is provided on the horizontal rotating rod. The unlocking pedal rotates synchronously with the horizontal rotating rod and can slide relative to the length direction of the horizontal rotating rod.

[0006] The ladder legs are equipped with locking devices that can cooperate with the unlocking pedal;

[0007] The unlocking pedal can slide to at least positions A and B relative to the length of the horizontal rotating rod. When the unlocking pedal slides to position A relative to the length of the horizontal rotating rod, the unlocking pedal engages with the locking mechanism to lock the horizontal rotating rod, preventing it from rotating. When the unlocking pedal slides to position B relative to the length of the horizontal rotating rod, the unlocking pedal separates from the locking mechanism.

[0008] Furthermore, it also includes an elastic reset component, which applies an elastic reset force to the unlocking pedal along the length of the transverse rotating rod. Under the elastic reset force of the elastic reset component, the unlocking pedal at position B spontaneously slides to position A relative to the length of the transverse rotating rod, and the reset position of the unlocking pedal is position A.

[0009] Furthermore, the locking component is a housing fixed to one side of the lower part of the ladder leg. A locking hole is provided on the side of the housing near the unlocking pedal. A transverse locking pin is fixedly connected to the lower side of the unlocking pedal near the locking hole via a structural block. When the unlocking pedal is in position A, the locking pin is inserted into the locking hole. When the unlocking pedal is in position B, the locking pin has disengaged from the locking hole.

[0010] Furthermore, the linkage structure includes a swing arm, a linkage rod, a movable sleeve, and a pressing block that are vertically connected to the transverse rotating rod; a slot is provided at the end of the swing arm;

[0011] The spacing between the pressing blocks matches the lower side of the unlock button, and the pressing blocks are fixed to one side of the movable sleeve, which is fitted onto the upper part of the ladder leg; the upper end of the linkage rod is fixedly connected to the movable sleeve, and the lower end of the linkage rod is vertically connected to a horizontal locking rod, the end of which can be movably locked in a slot provided at the end of the swing arm.

[0012] Furthermore, the lower part of the linkage rod has a thrust spring, which exerts a downward elastic thrust on the transverse locking rod.

[0013] Beneficial effects: When a person is climbing the ladder, the unlocking pedal automatically slides to its position relative to the length of the horizontal rotating rod, allowing the locking pin to insert into the locking hole and thus locking the unlocking pedal. This prevents the horizontal rotating rod from rotating. Even if a child or other person steps on the unlocking pedal forcefully or attempts to rotate it, the horizontal rotating rod will not rotate. This prevents children or unrelated persons on the ground from accidentally touching or rotating the unlocking pedal while a person is climbing the ladder, thus avoiding the risk of falling due to accidental contact. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the entire retractable ladder;

[0015] Figure 2 This is a disassembled diagram of the linkage structure;

[0016] Figure 3 This is a disassembled diagram of the part that supports the pedal. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figures 1 to 3 The diagram shows an anti-accidental pressing linkage structure for the unlocking button of a telescopic ladder, such as... Figure 1 As shown, the ladder includes a telescopic ladder body 1, which includes ladder legs 8, a load-bearing step 19 arranged laterally between the two ladder legs 8, an unlocking button 16, and a telescopic ladder rod 15 telescopically connected to the upper end of the ladder legs 8.

[0019] The location, function, and structure of the unlocking button 16 in this case are consistent with the "button" in the structure of a novel telescopic ladder with authorization announcement number CN217783381U; both are located on the lower sides of both ends of the load-bearing step 19. When the unlocking button 16 is pressed upward, the internal linkage structure unlocks the telescopic ladder rod 15, which will not be described in detail here; the core content of this case is as follows:

[0020] A horizontal rotating rod 2 is rotatably provided at the lower part between the two ladder legs 8. The horizontal rotating rod 2 is linked to the unlocking button 16 through a linkage structure. The rotation of the horizontal rotating rod 2 will drive the linkage structure to press the unlocking button 16 upward.

[0021] An unlocking pedal 3 is provided on the transverse rotating rod 2. The unlocking pedal 3 rotates synchronously with the transverse rotating rod 2 and can slide relative to the length direction of the transverse rotating rod 2. In the specific structure, a sleeve 21 is provided through the unlocking pedal 3 along the length direction. The sleeve 21 is movably sleeved on the outside of the transverse rotating rod 2. At the same time, a slide bar 40 is fixedly provided on the transverse rotating rod 2 along the length direction. A guide groove 22 is provided inside the sleeve 21 along the length direction to slide and guide the slide bar 40. This realizes the function of the unlocking pedal 3 rotating synchronously with the transverse rotating rod 2 and the unlocking pedal 3 sliding relative to the length direction of the transverse rotating rod 2.

[0022] The ladder leg 8 is equipped with a locking element that can cooperate with the unlocking pedal 3; the unlocking pedal 3 can slide to at least positions A and B relative to the length of the transverse rotating rod 2. Figure 1 and Figure 2 The middle position is B; when the unlocking pedal 3 slides to position A relative to the length of the transverse rotating rod 2, the unlocking pedal 3 cooperates with the locking member to lock the transverse rotating rod 2, so that the transverse rotating rod 2 cannot rotate; when the unlocking pedal 3 slides to position B relative to the length of the transverse rotating rod 2, the unlocking pedal 3 separates from the locking member.

[0023] The locking mechanism in this case is a housing 7 fixed to one side of the lower part of the ladder leg 8. A locking hole 6 is provided on the side of the housing 7 near the unlocking pedal 3. A transverse locking pin 5 is fixedly connected to the lower side of the unlocking pedal 3 near the locking hole 6 via a structural block 4. When the unlocking pedal 3 is in position A, the locking pin 5 is inserted into the locking hole 6; when the unlocking pedal 3 is in position B, the locking pin 5 is disengaged from the locking hole 6. An upwardly protruding protrusion 30 is provided on the upper side of the unlocking pedal 3 away from the locking pin 5, facilitating the user to move the unlocking pedal 3 with their foot.

[0024] It also includes an elastic reset element, which applies an elastic reset force to the unlocking pedal 3 along the length of the transverse rotating rod 2. Under the elastic reset force of the elastic reset element, the unlocking pedal 3 at position B spontaneously slides to position A relative to the length of the transverse rotating rod 2, and the reset position of the unlocking pedal 3 is position A. The elastic reset element is a reset spring extending along the length of the transverse rotating rod 2, which can be placed in the guide groove 22 along the length direction. One end of the reset spring is connected to the left end of the slide bar 40, and the other end pushes the unlocking pedal 3 to the left.

[0025] The linkage structure includes a swing arm 12, a linkage rod 10, a movable sleeve 18, and a pressing block 17 vertically connected to the transverse rotating rod 2; the end of the swing arm 12 is provided with a waist-shaped slot 13; the lower part of the linkage rod 10 moves through the guide hole 9 on the housing 7; the pressing block 17 is spaced to the lower side of the unlock button 16, and the pressing block 17 is fixed to one side of the movable sleeve 18, which is movably fitted onto the upper part of the ladder leg 8; the upper end of the linkage rod 10 is fixedly connected to the movable sleeve 18, and the lower end of the linkage rod 10 is vertically connected to a transverse locking rod 14, the end of which is movably locked in the slot 13 at the end of the swing arm 12; the lower part of the linkage rod 10 has a thrust spring 11, which exerts a downward elastic thrust on the transverse locking rod 14, thereby causing the swing arm 12 to swing downward.

[0026] The end of the transverse rotating rod 2 moves through the rotating hole on the housing 7. Meanwhile, in order to avoid exposing the linkage structure, the transverse locking rod 14 and the swing arm 12 are both inside the housing 7.

[0027] How this solution works:

[0028] In the initial state, the state of personnel climbing the ladder, or the extended state, under the lateral elastic thrust of the elastic reset component, the unlocking pedal 3 spontaneously slides to position A relative to the length direction of the lateral rotating rod 2, causing the locking pin 5 to insert into the locking hole 6, thereby locking the unlocking pedal 3 and preventing the lateral rotating rod 2 from rotating. At this time, even if a child or other person steps on the unlocking pedal 3 forcefully or attempts to rotate the unlocking pedal 3, the lateral rotating rod 2 will not be able to rotate, thus preventing the unlocking pedal 3 from being accidentally touched and rotated by children or unrelated personnel on the ground while personnel are climbing the ladder, and avoiding the risk of being accidentally touched and falling.

[0029] Unlocking process:

[0030] Gently step on the unlocking pedal 3 with your foot and push the protruding post 30 laterally with one side of your foot. This will cause the unlocking pedal 3 to slide along the length of the transverse rotating rod 2, disengaging the locking pin 5 from the locking hole 6. This will bring the unlocking pedal 3 to position B. Immediately apply a torsional force to the unlocking pedal 3 with your foot, causing the transverse rotating rod 2 to rotate and agitate. The rotation of the transverse rotating rod 2 will then cause the swing arm 12 to swing upward, thereby driving the linkage rod 10 to move upward through the transverse locking rod 14. The linkage rod 10 will then drive the movable sleeve 18 and the pressing block 17 to move upward and press the unlocking button 16. After the unlocking button 16 is pressed, the telescopic ladder rod 15 will be unlocked. At this time, the unlocked telescopic ladder rod 15 can freely retract into the ladder leg 8.

[0031] Once the extension / retraction process is complete, the foot releases the unlocking pedal 3, and the linkage structure automatically returns to its original position under the action of the thrust spring and the return spring.

[0032] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A linkage structure for preventing accidental stepping on an unlocking button of a telescopic ladder, comprising a telescopic ladder body (1), wherein the telescopic ladder body (1) includes ladder legs (8), a load-bearing step (19) transversely arranged between two ladder legs (8), an unlocking button (16), and a telescopic ladder rod (15) telescopically connected to the upper end of the ladder legs (8); characterized in that: A horizontal rotating rod (2) is rotatably provided at the lower part between the two ladder legs (8). The horizontal rotating rod (2) is linked to the unlocking button (16) through a linkage structure. The rotation of the horizontal rotating rod (2) will drive the linkage structure to press the unlocking button (16).

2. The anti-accidental stepping linkage structure for the unlocking button of a telescopic ladder according to claim 1, characterized in that: The transverse rotating rod (2) is provided with an unlocking pedal (3). The unlocking pedal (3) rotates synchronously with the transverse rotating rod (2), and the unlocking pedal (3) can slide relative to the length direction of the transverse rotating rod (2). The ladder leg (8) is provided with a locking element that can cooperate with the unlocking pedal (3); The unlocking pedal (3) can slide to at least position A and position B in the length direction of the horizontal rotating rod (2); when the unlocking pedal (3) slides to position A in the length direction of the horizontal rotating rod (2), the unlocking pedal (3) cooperates with the locking member to lock the horizontal rotating rod (2) so that the horizontal rotating rod (2) cannot rotate. When the unlocking pedal (3) slides to position B relative to the length of the transverse lever (2), the unlocking pedal (3) separates from the locking element.

3. The anti-accidental stepping linkage structure for the unlocking button of a telescopic ladder according to claim 2, characterized in that: It also includes an elastic reset member, which applies an elastic reset force to the unlocking pedal (3) along the length direction of the transverse rotating rod (2). Under the elastic reset force of the elastic reset member, the unlocking pedal (3) at position B spontaneously slides to position A relative to the length direction of the transverse rotating rod (2). The reset position of the unlocking pedal (3) is position A.

4. The anti-accidental stepping linkage structure for the unlocking button of a telescopic ladder according to claim 3, characterized in that: The locking component is a housing (7) fixed to one side of the lower part of the ladder leg (8). The housing (7) has a locking hole (6) on the side near the unlocking pedal (3). The lower side of the unlocking pedal (3) near the locking hole (6) is fixedly connected to a transverse locking pin (5) by a structural block (4). When the unlocking pedal (3) is in position A, the locking pin (5) is inserted into the locking hole (6). When the unlocking pedal (3) is in position B, the locking pin (5) has disengaged from the locking hole (6).

5. The anti-accidental stepping linkage structure for the unlocking button of a telescopic ladder according to claim 2, characterized in that: The linkage structure includes a swing arm (12), a linkage rod (10), a movable sleeve (18), and a pressing block (17) vertically connected to the transverse rotating rod (2); the end of the swing arm (12) is provided with a slot (13); The spacing of the pressing blocks (17) is matched with the lower side of the unlock button (16), and the pressing blocks (17) are fixed to one side of the movable sleeve (18). The movable sleeve (18) is movably fitted on the upper part of the ladder leg (8). The upper end of the linkage rod (10) is fixedly connected to the movable sleeve (18), and the lower end of the linkage rod (10) is vertically connected to a horizontal locking rod (14). The end of the horizontal locking rod (14) can be movably locked in the slot (13) provided at the end of the swing arm (12).

6. The anti-accidental stepping linkage structure for the unlocking button of a telescopic ladder according to claim 4, characterized in that: The lower part of the linkage rod (10) has a thrust spring (11), which exerts a downward elastic thrust on the transverse locking rod (14).

Images