One-key folding extension ladder with baffle capable of automatically resetting

Abstract

A one-key folding extension ladder with a baffle capable of automatically resetting comprises an extension ladder body, a reinforcing pedal, a linkage structure and the baffle. The linkage structure comprises a U-shaped rod and two cover bodies. The U-shaped rod comprises a transverse rod and two vertical rods. And a mounting cavity is formed in the reinforcing pedal. A first fixing pipe and a second fixing pipe are fixed to the front side of the reinforcing pedal. And an electromagnet is mounted in the first fixed pipe. A touch switch is installed in the second fixing pipe. A power supply, a Moss tube, a capacitor and a resistor are mounted in the mounting cavity. And a side plate and an iron sheet are fixed on the baffle plate. And grooves are formed in the side plates. And an elastic block is slidably connected in the groove. And a spring is fixedly connected between the elastic block and the groove bottom of the groove. The baffle can automatically rotate downwards to reset after rotating upwards and being fixed for a period of time, the cross rod is shielded again, and the situation that a user forgets to rotate the baffle downwards is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ladders, in particular to a one-button foldable telescopic ladder with a baffle capable of automatically resetting. Background Art

[0002] The applicant has previously applied for and authorized a Chinese patent with an authorization announcement number of CN218493527U. A one-touch foldable telescopic ladder with a baffle includes a ladder body, which includes two ladder tubes and a plurality of treads. The ladder tubes are formed by a plurality of section tubes being fitted in sequence. Both ends of the treads are provided with a locking structure and a button. A reinforcement pedal is fixedly connected between the two corresponding section tubes at the bottom of the plurality of section tubes. The reinforcement pedal is provided with a linkage structure. The linkage structure includes a U-shaped rod and two covers. The U-shaped rod includes a crossbar and two vertical rods. The top of the vertical rod passes through the reinforcement pedal and penetrates into the cover in a sliding connection, and a block is fixed. The reinforcement pedal is rotatably connected with a rotating shaft, and a baffle is fixed to the other end of the rotating shaft. The bottom end of the baffle extends downward to the bottom of the crossbar. A cavity is provided inside the reinforcement pedal, and a limiting structure for limiting the rotation of the rotating shaft is provided in the cavity. The utility model can fold the telescopic ladder body more quickly and conveniently, and can avoid misoperation.

[0003] However, in the actual use of the utility model, the applicant found that many users often forgot to rotate the baffle downward to cover the crossbar when the ladder body was unfolded the next time after rotating the baffle upward to retract the ladder body. As a result, the baffle did not play the role of protecting the crossbar as expected to avoid misoperation caused by accidentally touching the crossbar. Moreover, the area of ​​the baffle in the utility model is small and cannot completely cover the crossbar, so the protective effect on the crossbar is limited.

[0004] Therefore, the utility model proposes a technical solution to solve the problem that the user forgets to rotate the baffle downward after rotating the baffle upward, resulting in the baffle failing to protect the crossbar after the ladder body is unfolded. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a one-touch foldable telescopic ladder with an automatically reset baffle, aiming to achieve the technical effect that the baffle can automatically rotate downward and reset after being rotated upward and fixed for a period of time.

[0006] A one-touch foldable telescopic ladder with a baffle that can automatically reset, comprising a telescopic ladder body, a reinforced pedal, a linkage structure and a baffle, wherein the linkage structure comprises a U-shaped rod and two covers, and the U-shaped rod comprises a crossbar and two vertical rods;

[0007] An installation cavity is provided inside the reinforcement pedal, and a first fixed tube and a second fixed tube communicating with the installation cavity are fixed at the middle position of the front side of the reinforcement pedal, the length of the first fixed tube is greater than that of the second fixed tube, an electromagnet is fixedly installed inside the first fixed tube, one end of the electromagnet passes through the front end of the first fixed tube, a touch switch is fixedly installed inside the second fixed tube, and the button of the touch switch passes through the front end of the second fixed tube, a power supply, a Moss tube, a capacitor and a resistor are installed in the installation cavity, the positive and negative poles of the capacitor are respectively welded to the grid and the source of the Moss tube, the resistor is welded between the positive and negative poles of the capacitor, one leg of the touch switch is welded to the grid of the Moss tube, the other leg of the touch switch is welded to one end of the wire on the electromagnet, the other end of the wire on the electromagnet is welded to the drain of the Moss tube, the positive pole of the power supply is connected to the connection between the touch switch and the electromagnet, and the negative pole of the power supply is connected to the source of the Moss tube;

[0008] The baffle is used to completely cover the cross bar, and the left and right sides of the top of the baffle are rotatably connected to the front side of the reinforced pedal through hinges. A side plate corresponding to one side of the second fixed tube and an iron sheet facing the electromagnet are fixed on the baffle, and a groove is opened on the side plate. A spring block is slidably connected in the groove, one end of the spring block is located in the groove and a spring is fixedly connected to the bottom of the groove, and the other end of the spring block passes through the groove and corresponds to the button of the touch switch and is arranged in an arc shape.

[0009] By adopting the above technical solution, after the baffle is rotated upward, one side of the side plate will first fit with the outer side wall of the second fixed tube, at which time, the electromagnet has not yet contacted the iron sheet. After continuing to rotate the plate upward, the end of the spring block that passes through the groove contacts the button of the touch switch, at which time, the electromagnet has not yet contacted the iron sheet. Continue to rotate the baffle upward again, the end of the spring block that passes through the groove presses the button of the touch switch, and the button of the touch switch moves downward and retracts into the second fixed tube, at which time, the electromagnet has not yet contacted the iron sheet. Continue to rotate the baffle upward again, the end of the spring block that passes through the groove presses on the second fixed tube, because the end of the spring block that passes through the groove is arc-shaped, the spring block slides into the groove, the spring is compressed to form a rebound force toward the outside of the groove, when the groove corresponds to the outer side wall of the second fixed tube, the spring block is completely pressed back into the groove, and the button of the touch switch automatically resets, and at this time, the iron sheet contacts the electromagnet, and there is a gap between the baffle and the button of the touch switch. That is, after the baffle is rotated upward, the spring block presses the button of the touch switch and releases it, and when the spring block releases the button of the touch switch, a gap is maintained between the baffle and the button of the touch switch, and the iron sheet contacts the electromagnetic sticker.

[0010] When the button of the touch switch is not pressed, the resistor acts as a pull-down resistor, pulling the power directly to a low level, and the Morse tube is in the cut-off state. When the button of the touch switch is pressed, the power supply gives the gate of the Morse tube a high level, making the Morse tube conductive, and the electromagnet energized to generate magnetism, and also charging the capacitor. When the button of the touch switch is reset, there is electricity in the capacitor, and the electricity in the capacitor is divided into two paths. One path is discharged through the resistor. The other path passes through the Morse tube. At this time, the voltage of the gate is still within the conduction range, the Morse tube is in the conduction state, and the electromagnet is still energized to generate magnetism. After a period of time, the electricity in the capacitor is discharged, the electromagnet is powered off, and the magnetism of the electromagnet disappears.

[0011] In summary, after the baffle rotates upward, it presses and releases the button of the touch switch once, so that the magnetism of the electromagnet is maintained for a period of time. The baffle is fixed for a period of time in the form of the iron sheet being adsorbed by the electromagnet. After a period of time, the magnetism on the electromagnet disappears, and the baffle automatically rotates downward and resets under the action of its own gravity. After the baffle of the utility model is rotated upward and fixed for a period of time, it can automatically rotate downward and reset, and re-cover the cross bar, avoiding the situation where the user forgets to rotate the baffle downward.

[0012] A further configuration of the utility model is that when the electromagnet contacts the iron sheet, the baffle rotates upward at an angle less than 180°.

[0013] By adopting the above technical solution, it is ensured that when the magnetism of the electromagnet disappears, the baffle can automatically rotate downward and reset under the action of its own gravity.

[0014] The utility model is further configured as follows: an opening communicating with the installation cavity is provided on the rear side of the reinforcement pedal, and a cover plate is covered at the opening by bolts.

[0015] By adopting the above technical solution, the arrangement of the opening and the cover plate makes it easy to replace the power supply in the installation cavity.

[0016] A further configuration of the utility model is that a plurality of hollow holes are provided on the baffle.

[0017] By adopting the above technical solution, the provision of the hollow holes reduces the weight of the baffle, and the user can rotate the baffle upwards more effortlessly.

[0018] The utility model is further configured as follows: a rubber sleeve is fixedly mounted on the bottom end of the baffle.

[0019] By adopting the above technical solution, the user can feel more comfortable when rotating the baffle upwards.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] A one-touch retractable ladder with a baffle that can automatically reset. After the baffle rotates upward, it presses and releases the button of the touch switch once, so that the magnetism of the electromagnet is maintained for a period of time. The baffle is fixed for a period of time in the form of an iron sheet being adsorbed by the electromagnet. After a period of time, the magnetism on the electromagnet disappears, and the baffle automatically rotates downward and resets under the action of its own gravity. After the baffle of the utility model is rotated and fixed upward for a period of time, it can automatically rotate downward and reset, and re-cover the crossbar, so as to avoid the situation where the user forgets to rotate the baffle downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a one-touch foldable telescopic ladder with a baffle that can automatically reset according to the utility model;

[0023] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0024] Figure 3 It is a cross-sectional view of a side panel in a one-touch foldable telescopic ladder with a baffle that can automatically reset according to the utility model;

[0025] Figure 4 The utility model discloses a circuit diagram of a power supply, a morse tube, a capacitor, a resistor and an electromagnet in a one-touch foldable telescopic ladder with a baffle capable of automatically resetting.

[0026] Figure numerals: 1, telescopic ladder body; 2, reinforcement pedal; 3, baffle; 4, cross bar; 5, first fixed tube; 6, second fixed tube; 7, iron sheet; 8, side plate; 9, groove; 10, spring block; 11, spring; 12, hollow hole; E+, positive pole of power supply; E-, negative pole of power supply; T, Moss tube; K, touch switch; L, electromagnet; C, capacitor; R, resistor; G, gate; S, source; D, drain. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] A one-touch retractable ladder with a baffle that can automatically reset, such as Figure 1-Figure 4As shown, the telescopic ladder comprises a main body 1, a reinforcement pedal 2, a linkage structure and a baffle 3, wherein the linkage structure comprises a U-shaped rod and two covers, and the U-shaped rod comprises a crossbar 4 and two vertical rods. The above structure can refer to the relevant description in the Chinese patent with the authorization announcement number CN218493527U, a one-touch folding telescopic ladder with a baffle 3, which will not be described in detail in this embodiment.

[0029] An installation cavity is provided inside the reinforcement pedal 2. A first fixed tube 5 and a second fixed tube 6 communicating with the installation cavity are fixed at the middle position of the front side of the reinforcement pedal 2. The length of the first fixed tube 5 is greater than that of the second fixed tube 6. An electromagnet L is fixedly installed inside the first fixed tube 5. One end of the electromagnet L passes through the front end of the first fixed tube 5. A touch switch K is fixedly installed inside the second fixed tube 6. The button of the touch switch K passes through the front end of the second fixed tube 6. A power supply, a moss tube T, a capacitor C and a resistor R are installed in the installation cavity. The positive and negative poles of the capacitor C are welded to the gate G of the moss tube T and the source S of the moss tube T respectively. The resistor R is welded between the positive and negative poles of the capacitor C. One leg of the touch switch K is welded to the gate G of the moss tube T. The other leg of the touch switch K is welded to one end of the wire on the electromagnet L. The other end of the wire on the electromagnet L is welded to the drain D of the moss tube T. The positive pole E+ of the power supply is connected to the connection between the touch switch K and the electromagnet L. The negative electrode E- of the power source is connected to the source electrode S of the Morse tube T. In this embodiment, the power source adopts a 12V lithium battery pack with a model number of INR18650, the capacitor C adopts a 220UF aluminum electrolytic capacitor C with a model number of 35YXJ220M8X11.5, the resistor R adopts a 68K metal film resistor R with a model number of MFR-50FR52, the electromagnet L adopts a DC suction cup electromagnet L with a model number of ELE-P25 / 11, and the Morse tube T adopts an 80V Morse tube T with a model number of 80N08.

[0030] The baffle 3 is used to completely block the crossbar 4. The top left and right sides of the baffle 3 are rotatably connected to the front side of the reinforcement pedal 2 through hinges. The baffle 3 is fixed with a side plate 8 corresponding to one side of the second fixed tube 6 and an iron sheet 7 facing the electromagnet L. A groove 9 is provided on the side plate 8. A spring block 10 is slidably connected in the groove 9. One end of the spring block 10 is located in the groove 9 and a spring 11 is fixedly connected to the bottom of the groove 9. The other end of the spring block 10 passes through the groove 9 and corresponds to the button of the touch switch K and is set in an arc shape.

[0031] Furthermore, when the electromagnet L contacts the iron sheet 7, the baffle 3 rotates upward at an angle less than 180°, so as to ensure that when the magnetism of the electromagnet L disappears, the baffle 3 can automatically rotate downward and reset under the action of its own gravity.

[0032] Furthermore, an opening communicating with the installation cavity is provided at the rear side of the reinforcement pedal 2, and a cover plate is closed at the opening by bolts. The arrangement of the opening and the cover plate facilitates replacement of the power supply of the installation cavity.

[0033] Furthermore, a plurality of hollow holes 12 are provided on the baffle plate 3. The provision of the hollow holes 12 reduces the weight of the baffle plate 3, and the user can rotate the baffle plate 3 upward with less effort.

[0034] Furthermore, a rubber sleeve is fixedly mounted on the bottom end of the baffle plate 3. When the user rotates the baffle plate 3 upward, it is more comfortable.

[0035] Working principle: After the baffle plate 3 is rotated upward, one side of the side plate 8 will first fit with the outer wall of the second fixed tube 6. At this time, the electromagnet L has not yet contacted the iron sheet 7. After the plate is rotated upward further, the end of the spring block 10 that passes through the groove 9 contacts the button of the touch switch K. At this time, the electromagnet L has not yet contacted the iron sheet 7. The baffle plate 3 is rotated upward further, and the end of the spring block 10 that passes through the groove 9 presses the button of the touch switch K. The button of the touch switch K moves downward and retracts into the second fixed tube 6. At this time, the electromagnet L has not yet contacted the iron sheet 7. Continue to rotate the baffle 3 upward, and the end of the spring block 10 that passes through the groove 9 presses on the second fixed tube 6. Since the end of the spring block 10 that passes through the groove 9 is arc-shaped, the spring block 10 slides into the groove 9, and the spring 11 is compressed to form a rebound force toward the outside of the groove 9. When the groove 9 corresponds to the outer wall of the second fixed tube 6, the spring block 10 is completely pressed back into the groove 9, and the button of the touch switch K is automatically reset. At this time, the iron sheet 7 contacts the electromagnet L, and there is a gap between the baffle 3 and the button of the touch switch K. That is, after rotating the baffle 3 upward, the spring block 10 will press the button of the touch switch K and release it, and when the spring block 10 releases the button of the touch switch K, there is a gap between the baffle 3 and the button of the touch switch K, and the iron sheet 7 contacts the electromagnetic sticker.

[0036] When the button of the touch switch K is not pressed, the resistor R acts as a pull-down resistor R, pulling the power directly to a low level, and the Morse tube T is in the cut-off state. When the button of the touch switch K is pressed, the power supply gives the gate G of the Morse tube T a high level, making the Morse tube T conductive, and the electromagnet L energized to generate magnetism, and also charging the capacitor C. When the button of the touch switch K is reset, there is electricity in the capacitor C, and the electricity in the capacitor C is divided into two paths. One path is discharged through the resistor R. The other path passes through the Morse tube T. At this time, the voltage of the gate G is still within the conductive range, the Morse tube T is in the conductive state, and the electromagnet L is still energized to generate magnetism. After a period of time, the electricity in the capacitor C is discharged, the electromagnet L is powered off, and the magnetism of the electromagnet L disappears.

[0037] In summary, after the baffle 3 rotates upward, the button of the touch switch K is pressed and released once, so that the magnetism of the electromagnet L is maintained for a period of time. The baffle 3 is fixed for a period of time by the iron sheet 7 being adsorbed by the electromagnet L. After a period of time, the magnetism on the electromagnet L disappears, and the baffle 3 automatically rotates downward and resets under the action of its own gravity. After the baffle 3 of the utility model is rotated upward and fixed for a period of time, it can automatically rotate downward and reset, and re-block the cross bar 4, avoiding the situation where the user forgets to rotate the baffle 3 downward.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A one-touch foldable telescopic ladder with a baffle that can automatically reset, comprising a telescopic ladder body (1), a reinforcement pedal (2), a linkage structure and a baffle (3), wherein the linkage structure comprises a U-shaped rod and two covers, and the U-shaped rod comprises a crossbar (4) and two vertical rods, characterized in that: The reinforcement pedal (2) has an installation cavity formed inside, and a first fixing tube (5) and a second fixing tube (6) communicating with the installation cavity are fixed at the middle position of the front side of the reinforcement pedal (2), the first fixing tube (5) is longer than the second fixing tube (6), an electromagnet (L) is fixedly installed inside the first fixing tube (5), one end of the electromagnet (L) protrudes from the front end of the first fixing tube (5), and a touch switch (K) is fixedly installed inside the second fixing tube (6), and the button of the touch switch (K) protrudes from the front end of the second fixing tube (6). , a power supply, a Moss tube (T), a capacitor (C) and a resistor (R) are installed in the installation cavity, the positive and negative electrodes of the capacitor (C) are respectively welded to the grid (G) of the Moss tube (T) and the source (S) of the Moss tube (T), the resistor (R) is welded between the positive and negative electrodes of the capacitor (C), one leg of the touch switch (K) is welded to the grid (G) of the Moss tube (T), the other leg of the touch switch (K) is welded to one end of the wire on the electromagnet (L), the other end of the wire on the electromagnet (L) is welded to the drain (D) of the Moss tube (T), the positive electrode (E+) of the power supply is connected to the connection between the touch switch (K) and the electromagnet (L), and the negative electrode (E-) of the power supply is connected to the source (S) of the Moss tube (T); The baffle (3) is used to completely block the crossbar (4); the left and right sides of the top of the baffle (3) are rotatably connected to the front side of the reinforcement pedal (2) through hinges; a side plate (8) corresponding to one side of the second fixed tube (6) and an iron sheet (7) facing the electromagnet (L) are fixed to the baffle (3); a groove (9) is provided on the side plate (8); a spring block (10) is slidably connected in the groove (9); one end of the spring block (10) is located in the groove (9) and a spring (11) is fixedly connected between the spring block (10) and the bottom of the groove (9); the other end of the spring block (10) passes through the groove (9) and corresponds to the button of the touch switch (K) and is arranged in an arc shape.

2. A one-touch foldable telescopic ladder with a baffle that can automatically reset according to claim 1, characterized in that: When the electromagnet (L) contacts the iron sheet (7), the baffle (3) rotates upward at an angle less than 180°.

3. The one-touch foldable telescopic ladder with automatically resetting baffle according to claim 1, characterized in that: An opening communicating with the installation cavity is provided on the rear side of the reinforcement pedal (2), and a cover plate is covered at the opening by bolts.

4. The one-touch foldable telescopic ladder with automatically resetting baffle according to claim 1, characterized in that: The baffle plate (3) is provided with a plurality of hollow holes (12).

5. The one-touch foldable telescopic ladder with automatically resetting baffle according to claim 1, characterized in that: A rubber sleeve is fixedly mounted on the bottom end of the baffle (3).

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