Security step ladder

Abstract

To provide a step stool for crime prevention, which is used by thieves or the like to break into a house through a window from the outside and does not react to light individuals such as small animals but reacts to heavy adults and issues an alarm. The security platform is designed to sound an alarm when an animal steps on it outdoors. It has a lower fixed base 2, an upper platform 1 suspended above the lower fixed base by multiple springs, and a switch spring 8 that expands and contracts at the top or bottom. When the upper platform descends under a certain load, the switch is turned on to emit sound and / or light, and the platform also has a sound generator 6 and / or light emitter 10.

Description

[Technical Field]

[0001] This invention relates to a security step stool that is mainly installed outdoors and that, when a thief or the like steps on it, issues a warning to the thief by emitting a sound or the like. [Background technology]

[0002] There have been numerous reported cases of thieves breaking into homes at night from outside and breaking window glass, or using windows or glass doors as entrances. In these cases, shutters are sometimes installed on places where people can pass through, such as sliding windows and doors, but in recent years, perhaps due to cost-cutting measures, many homes are being built without shutters or shutters. Patent Document 1 discloses a technology to protect against nighttime intruders, for example, by installing a cylinder on top of a fence or other structure. When an intruder stands on the cylinder, a spring contained within the cylinder is compressed, which then presses a push button, sounding an alarm with a horn. In addition to sound, some devices emit light, and technology is known that uses the compression force of a spring to sound some kind of alarm. However, this technology, which uses a spring and push button inside the cylinder to sound an alarm when stepped on, can be adapted for installation not only on fences but also around houses, as it sounds an alarm when installed on top of a fence. When installed, it will also sound an alarm when small animals such as dogs, cats, rats, raccoons, and palm civets wandering around at night pass by, so even if the alarm is a false alarm caused by a small animal in the middle of the night, it is necessary to inspect it each time. Every time the alarm sounds, you have to check outside, thinking that it might be a thief. If it's a false alarm, you feel relieved, but if it's an intruder, you have to be prepared to confront them. Like the example of the boy who cried wolf in the fairy tale, repeated false alarms can lead to a weakening of security awareness. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 58-22793 Summary of the Invention [Problem to be solved by the invention]

[0004] To provide a crime prevention step stool used by thieves and the like to break into a house through a window from the outside, which does not react to light individuals such as small animals but reacts to heavy adults and issues an alarm. [Means for solving the problem]

[0005] This invention is (1) An outdoor anti-theft step that sounds an alarm when an animal steps on it. A security platform comprising a lower fixed platform, an upper platform suspended above the fixed platform by a plurality of springs, and an expandable switch spring provided at the top or bottom, characterized in that when the upper platform is lowered with a load of 10 kg or more, an alarm sounds with a whistle caused by compressed air as the air bag descends, and a light-emitting element is also provided which is switched on and emits light by a control device. is.

[0006] The security step of this device functions as a step, and the upper and lower fixed bases are preferably 20-40cm long, 20-50cm wide, and 10-50cm high, with a shape that allows the upper platform to be stably fixed both above and below. While any material is acceptable, wood or resin is preferred. Metallic platforms are heavy and can be somewhat inconvenient to carry. Springs are located between the upper and lower fixed bases, and are installed at the four corners to secure the upper platform for at least stability. Four or more springs are preferred for stability. The 10kg load alarm is necessary to distinguish between adults and small animals. It activates when an adult steps on the platform, but does not sound an alarm for small animals weighing less than 10kg, making it necessary to identify thieves and other criminals. This prevents false alarms caused by small animals. The spring is a compression spring, preferably one that compresses when pressed, and since fixing the spring alone is often not stable, it is necessary to use an air bag in the center as well. This is because the springs at the four corners and the air bag in the center stabilize the upper platform, allowing it to be lowered stably when a person stands on it.

[0007] The air bag has an outlet through which air is released via a rubber hose or similar device, and the entire upper platform descends when the spring compresses. When a certain load is applied to the security platform, the switch spring must contact the lower contact and energize (not shown) as shown in Figure 2. The switch spring is used to prevent the platform from breaking even when compressed beyond the initial load. While the load can be freely adjusted depending on the spring specifications, a total drop of approximately 0.05–10 cm per 10 kg load is desirable for the platform's functionality. For stability, it is preferable to place the air bag between cushioning materials such as sponge rather than directly on the lower platform. Figure 3 shows an example using two sponge materials. A rubber hose is also required to adjust the pressure of the air bag, and a whistle must be attached to the end of the hose to provide an alarm.

[0008] When an intruder steps onto the security step, the spring compresses and energizes the spring switch, and then the control device causes the light and / or sound emitter or sound emitter to warn the intruder, such as a thief, and simultaneously warn the household members in the home, thereby dealing with the thief. In addition to a whistle, a buzzer or music from a speaker can also be used as the sound emitter, and since it is intended for use at night, the volume can be set appropriately. In the case of light, various types of lights can also be used. Since it is installed outdoors, a waterproof structure is preferable, and since it is intended to be mobile, it is preferable to have an internal power source such as a battery, but a fixed type, such as a security step installed under a window, is also possible. [Effects of the Invention]

[0009] The security step of this invention sounds an alarm when a thief steps onto the step prepared to break in through a window, etc., eliminating false alarms caused by small animals and making it possible to determine if it is a real intruder, and in addition to reporting the burglary to the police, you can confront the thief with a stick or something similar. [Brief explanation of the drawings]

[0010] [Figure 1] The top view of the step of this invention [Figure 2] Switch spring structure diagram [Figure 3] The lower fixing base and internal parts of this device DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention will be explained with reference to examples. [Example]

[0012] Figure 1 shows a schematic diagram of the top of the device. The entire device is made of wood, measuring 30 cm long, 45 cm wide, and 20 cm high when assembled. Four compression springs (product number C-200-2) are installed at the four corners, and a spring switch (see Figure 2) is also installed. In this device, the height of the switch springs was adjusted so that the switch would activate when a load of 16 kg was applied. Four 2 cm rubber feet were installed under the lower base to raise the base and stabilize it when installed. Air bags were installed in the center of each corner, and two sponges were installed between the air bags and the lower base to further stabilize the air bags. When a 55 kg person stood on the device, the air bags and springs were compressed, causing air to flow through the hose to the whistle. The whistle sounded and the light flashed, alerting both the intruder and the entire house. It was also confirmed that the device was deactivated when a 3 kg cat stood on it. [Industrial Applicability]

[0013] When installed outdoors, the device can sound an alarm only when an intruder such as a thief steps on it, preventing false alarms caused by small animals and the like, and can be used as a crime prevention step. [Explanation of symbols]

[0014] 1 Upper step 2 Lower fixing base 3 air bladder 4. Sponge 5 Hose 6 Whistle 7. Spring 8 Switch spring 9 batteries 10 Light

Claims

[Claim 1] An outdoor anti-theft step that sounds an alarm when an animal steps on it. This security platform has a lower fixed base, an upper platform suspended above the fixed base by a plurality of springs, and an expandable switch spring provided at the top or bottom, and when the upper platform descends with a load of 10 kg or more, an alarm is sounded by a whistle generated by compressed air as the air bag descends, and at the same time, a light-emitting body is switched on and emits light by a control device.

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