JPS586111Y2 - anti-theft device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an anti-theft device.

Conventionally, anti-theft devices used to prevent bicycle theft have been so-called locks, which have been easily destroyed and have little effect.

There is also a detection method based on the capacitance that changes when a metal part of the bicycle is touched, but this method is expensive and has the drawback of being prone to false alarms.

The present invention was created in view of the above-mentioned drawbacks, and its purpose is to operate using forces such as vibrations and centrifugal force, to reduce false alarms, to have a simple structure, and to ensure theft prevention.
Moreover, it is an object of the present invention to provide an anti-theft device that can be easily set and released using a key body.

The present invention will be explained below with reference to embodiment figures.

The container body 1 is made of synthetic resin or the like and can be divided into left and right parts, and both the divided parts 1a and Ib are butted together with a rubber gasket 2 interposed therebetween, and one of the divided parts 1a contains an electric circuit,
The operating mechanism and the like are built in, and the lower end of the cylindrical body 3 is exposed on the lower side.

The cylindrical body 3 is provided with an operating mechanism, and a cylindrical main magnet 4 is fixed coaxially to the upper part of the through hole, and the inner part of the through hole from the fixed position of the main magnet 4 to the opening of the divided body 1a is A female threaded portion 5 is provided around the periphery, and a disc-shaped cover 10 having a male screw 6 on the outer periphery that is screwed into the female threaded portion 5 is screwed onto the female threaded portion 5 in a freely screwable manner. A steel ball 7 is housed in the through-hole space between the main muck 10 and the main muck net 4.

The steel ball 7 is always attracted to the main magnet 4, and passes through the main magnet 40 through the driving body 8a of the electric open/close switch 3, which is a so-called micro switch fixed in the divided body 1a above the cylindrical body 3. The upper portion is driven upward within the hole 4a.

A small auxiliary magnet 9 having a magnetic force smaller than that of the main magnet 4 is attached to the center of the upper surface of the cover 10, and the auxiliary magnet 9 is separated downward from the lower surface of the steel ball 7 attracted to the main magnet 4. When the cover 10 is spirally moved to the position, it is biased downward by the magnetic force of the auxiliary magnet 9, so that when vibration or centrifugal force is applied, the steel ball 7 can be easily separated from the main magnet 4, and the steel ball 7 can be easily separated. The steel balls 7 that are separated are attracted to the auxiliary magnet 9.

Further, a keyway 10a is bored on the surface of the cover 10, and by inserting the protrusion 11a of the key body 11 from the outside of the container 1 into the keyway 10a and rotating it, the cover 10 can be opened.
can be screwed upward or downward, and can be set or released by moving it to the lower position as shown in Figure 2 or to the upper position as shown in Figure 4. In the case of steel ball 7
is inserted between the main magnet 4 and the cover 10 to prevent the steel ball 7 from falling, and the electric open/close switch 8 is set so as not to operate.

Additionally, three new protrusions 11a on the key body 11 and three key grooves 10a on the cover 10 are provided to prevent them from being easily removed.

The electric open/close switch 8 is connected to an alarm display means 13 such as an electronic buzzer via a battery power source 12 housed in the divided body 1a.

FIG. 7 is its electrical circuit diagram.

The alarm transmitting port 19 of the alarm display means 13 is formed on the surface of the divided body 1a with a dew-proof structure.

Further, 20 in the figure is a holder for the battery power source 12.

On the other hand, the device body 10 divided body 1b is provided with a mounting fitting 16 on the back side, and this installation is done by tightening the mounting part with a tightening screw 17 between the fitting 16 and the divided body 1b. For example, as shown in FIG. 8, it can be attached to a spoke 18a of a bicycle wheel 18.

For installation, the mounting pitch of the metal fittings 16 can be adjusted.1. It can be adapted to various mounting parts.

Assuming that it is now in the certified state as shown in Figure 2,
Since the alarm display means 13 is disconnected from the battery power source 12, it does not issue an alarm.

Next, when the non-owner moves the bicycle and starts driving, vibration and centrifugal force act on the steel ball 7, causing the third
As shown in the figure, the steel ball 7 separates from the main magnet 4 and is attracted to the auxiliary magnet 9 of the cover 10.

As a result, the driver 8a of the electric on/off switch 8, which had been pushed and driven by the steel ball 7, returns to its original state, and the electric on/off switch 8 closes, connecting the alarm display means 13 to the battery power source 12, and outputting an alarm. send.

When the owner drives the vehicle or stops the above-mentioned alarm transmission, the cover 10 is screwed upward to the position shown in FIG. 4 using the key body 11, and the steel ball 7 is attracted to the main magnet 3. All you have to do is leave it in that state.

The electric on/off switch 8 may be housed in the through hole 4a of the main magnet 40 as shown in FIG. 9.

Furthermore, as shown in FIGS. 10a to 10d, the cylindrical body 3 may of course be structured to protrude outward from the lower surface of the square vessel 1. In this case, the internal structure of the cylindrical body 3 is similar to that shown in FIG. It has a similar configuration to the example.

In addition, the mounting bracket 16 has a resistance of Ω so that it can be attached to the structure 21 of the bicycle as shown in FIGS. 11 and 12.
The shaped metal fitting 24 is fixed to the container body 1 with a fixing screw 22, and both ends are tightened with a tightening screw 23 to reduce the diameter, and the fitting is installed.

Furthermore, although the above usage example is a bicycle, it is of course possible to attach the device to a bicycle or other objects.

The present invention consists of a main magnet that attracts a steel ball, an electric switch that is driven to open and close by the steel ball when the steel ball is attracted to the main magnet, and an alarm display means that is activated when the electrical switch is closed. Since it is equipped with a battery power source that operates this alarm display means, the electric open/close switch can be closed by the separation of the steel ball when vibration or centrifugal force is applied, and an alarm can be issued. By attaching it to objects such as bicycles, it is possible to reliably warn of theft, and since it is activated by vibration and centrifugal force, it is highly reliable with fewer malfunctions, and does not have a complex structure. It has the advantage that it does not require an electric circuit, has a simple structure, and is inexpensive.

Furthermore, the present invention includes a cylindrical body that stores the main magnet in the upper interior and a steel ball in the lower interior, and a female thread is formed on the periphery of the cylindrical body, and the disc-shaped cover is screwed into the cylinder below the steel ball. It is worn inside the body, and the lower surface of the disc-shaped cover is provided with a key groove that engages with the key body, so when it is necessary to release the device, the key body must be engaged with the disc-shaped cover. By rotating the key body, the disk-shaped cover is screwed upward, and the steel balls are clamped between the main magnet and the plate-shaped cover, thereby preventing the steel balls from falling from the main magnet. It can be easily stopped, making it ideal for items that are used on a daily basis, such as bicycles, and which require the device to be stopped while in use.Moreover, it can be set by simply putting the plate cover back on. It has the advantage of being

[Brief explanation of drawings]

Figures 1a, b, and c are respectively a front view, a rear view, and a bottom view of an embodiment of the present invention; Figure 2 is a vertical sectional view of the same; Figures 3 and 4 are
The figure is an explanatory diagram of the same operation as above, and FIG. 5a. b is a front view and a side view of the same key body, FIG. 6 is an enlarged bottom view of the cylindrical body part of the above, FIG. 7 is an electric circuit diagram of the same,
Fig. 8 is an explanatory diagram showing the installation of the same as above, Fig. 9 is an enlarged sectional view of the cylindrical part of another embodiment of the present invention, and Figs. 10 a - d are top and front views of other embodiments of the present invention, respectively. Figure, side view, back view,
Figures 11 and 12 are explanatory diagrams of the same installation as above, 4 is the main magnet, 7 is a steel ball, 8 is an electric switch, 12
13 is a battery power supply, 13 is an alarm display means, 3 is a cylindrical body, 5 is a female screw portion, 10 is a cover, 10a is a keyway, and 11 is a key body.

Claims (1)

[Scope of claim for utility model registration] (υ A cylindrical main magnet with through holes at the top and bottom, and a steel ball that enters the through hole when the steel ball is attracted to the bottom opening of the main magnet. An anti-theft device comprising an electric on-off switch that is driven to open and close at the top, an alarm display means that is operated by closing the electric on-off switch, and a battery power source that operates the alarm display means. A cylindrical body is provided in which a steel ball is housed in an upper interior and a steel ball is housed in a lower interior, a female thread is formed on the periphery of the cylindrical body, and a steel ball lower disc-shaped cover is screwably attached to the cylindrical body. An anti-theft device comprising a key groove that engages with the key body on the lower surface of the shaped cover. (2) Scope of Utility Model Registration In the anti-theft device described in claim (1) above the main magnet is an electric An on-off switch is arranged, and the driver of the electric on-off switch is inserted into a through hole from above to below. (3) In the anti-theft device according to claim (1) of the utility model registration claim. , consisting of an electric open/close switch housed in the through hole of the main magnet.