KR200353489Y1 - key ring with electronic sensor for preventing loss - Google Patents

Abstract

Disclosed is a key ring having a loss-proof electronic sensor for preventing the loss of a key for opening and closing a locker of a school, a sauna room, a wardrobe and a shoe rack of a gym. The key ring includes an outer case 32 having a key fixed to an outer circumferential surface thereof and having an inner space, and an inner case 31 housed inside the outer case 32. The inner case 31 has a coil 5 and a coil 1 wound around the core 5 and sequentially coated with an insulating layer and an adhesive layer on the outer circumference thereof and hot-melted between adjacent adhesive layers during winding, and a coil ( An electromagnetic sensitive sensor composed of the capacities 4 connected to 1) to form a resonant circuit has a structure molded by the molding 60. The key ring adopts an electronic sensor in the case to absorb radio waves emitted from the gate of the entrance when passing through the entrance of a sauna or gym, and detects this by matching the set resonant frequency of the receiving antenna to detect theft of the key. To prevent it.

Description

Key ring with electronic sensor for preventing loss

The present invention relates to a key ring having an anti-lost sensor, and particularly, an anti-lose type electromechanical sensor for preventing the loss of keys for opening and closing lockers in schools, sauna rooms, wardrobes, and gymnasiums. It relates to a key ring having a sensor.

In general, lockers that safely store personal items are locked with a key to prevent theft of goods.

In particular, the lockers and shoe racks of the sauna facilities are returned to the counter so that the next user can reuse them by using the objects with the public.

However, there is a case in which some users have left the lost and lost the key without inadvertently returning it.

An object of the present invention is to provide a key ring having an electronic sensitive sensor for preventing the loss of the locker key used by the public to solve the above problems.

1 is a perspective view showing a key ring of an embodiment of the present invention,

2 is a perspective view showing another embodiment of the present invention,

3 is a sectional view of the key ring of the present invention,

Figure 4 is a perspective view showing an electronic sensitive sensor employed in the key ring of the present invention.

* Explanation of symbols for main parts of the drawings

1 ... coil 4 ... capercity

5 ... core 30 ... key ring

31.Inner Case 32 ... Outer Case

60 ... molding

The present invention to achieve the above object is provided with a resonant circuit for absorbing radio waves emitted from the gate of the entrance when passing through the entrance in the key ring having a loss-proof electronic sensor for preventing the loss,

A key fixed to an outer circumferential surface and having an inner case having an inner space, and an inner case accommodated inside the outer case,

The inner case has a core, a coil wound around the core, and a coil in which the insulating layer and the adhesive layer are sequentially coated on the outer circumference thereof, and which are thermally melt-bonded to the adjacent adhesive layers during winding, and the capacitors connected to the coil to form a resonance circuit. It characterized in that the electromagnetic sensitive sensor is formed by molding.

In addition, the key ring of the present invention may be further provided with a band to be stored and stored on the wrist or ankle.

According to the features of the present invention, the key ring of the present invention by adopting an electronic sensor in the case absorbs the radio wave emitted from the entrance when passing through the entrance and detects it by matching the set resonance frequency of the receiving antenna to detect theft of the key To prevent it.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Key ring according to the embodiment of the present invention employs an electronic sensor to the inside to prevent theft of the key to open and close the locker of the sauna or gym facilities used by the public.

In addition, a gate (not shown) with a transmitting antenna and a gate (not shown) with a receiving antenna are provided at an entrance of a sauna or a gymnasium, so that the user can detect the entry and exit of the key ring to prevent theft. do.

1 and 2 show the key ring 10, 30 of the embodiments of the present invention, the key ring 30 of the embodiment shown in Figure 1 can be stored by wearing the key 40 on the wrist or ankle Band 50 is employed.

Since the internal structure of each key ring 10, 30 is the same, it will be described in detail by taking the key ring 30 shown in FIG.

Referring to Figure 1 and Figure 3 showing a cross-section of the key ring 30, which is an outer case 32 having a key fixed to the outer circumferential surface and having an inner space, and an inner case accommodated inside the outer case 32 ( 31).

3 and 4, the inner case 31 is wound around a core 5 and the core 5, and an insulating layer and an adhesive layer are sequentially coated on the outer circumference thereof, and adjacent adhesive layers are mutually formed during winding. An electromagnetic sensitive sensor including a coil 1 to be melt-bonded and a capacity 4 connected to the coil 1 to form a resonance circuit is molded by the molding 60.

The key ring 30 has a structure in which the electronic sensor is molded in the inner case 31, it can be protected from moisture when entering the sauna facility.

The core 5 may be formed of a long cylindrical or rod-shaped ferrite, and may be formed of an amorphous alloy core. The amorphous magnetic material has no crystal magnetic anisotropy, easy magnetization, and small coercive force. In addition, the atomic arrangement is disordered and the electrical resistance is large, so the eddy current loss is small, so the high frequency characteristics are good. In the high frequency region of several Mhz or more, ferrite core has better magnetic properties than amorphous, and amorphous has good magnetic properties at saturation magnetic flux density.

In addition, when amorphous is used, it is advantageous to miniaturization and weight reduction of the product than when ferrite core is used.

Ferrite cores have a high permeability, resistivity from several kΩ to several MΩ, and magnetostriction is also a material with high characteristics.

When the key ring 30 employing the electromagnetic sensitive sensor is placed in an alternating magnetic field having a constant frequency band, a resonant circuit such as the resonant frequency of the ferrite core 5 surrounding the key ring 30 resonates, thereby causing the ferrite core to resonate. Will cause mechanical magnetostriction.

That is, the mechanical magnetostriction of the ferrite core 5 becomes maximum at the resonant frequency of the material and minimum at the anti-resonant frequency.

Mechanical magnetostriction of ferrite cores in an alternating magnetic field causes a change in the permeability of the material and a change in permeability results in a change in magnetic flux density. Therefore, the variation of the magnetic flux density causes a high induced electromotive force to be applied to the search coil according to Faraday's law of magnetic induction to generate an alarm signal.

When such a key ring 30 passes between the gate with the transmitting antenna and the gate with the receiving antenna, the key ring 30 is absorbed by the resonant circuit provided in the key ring 30 and received by the receiving antenna. When the resonant frequency coincides with the set resonant frequency, an alarm sound or the like is generated to notify the clerk so as to prevent the illegal release of the key.

The present invention as described above is not limited to the above embodiments without departing from the spirit and scope of the present application can be carried out with a number of modifications.

As described above, the key ring of the present invention adopts an electronic sensor in the case to absorb the radio wave emitted from the gate of the entrance when passing through the entrance of a sauna or gym facility, and detects it by matching the set resonance frequency of the receiving antenna. It helps to prevent theft of keys.

In addition, by adopting a cylindrical core, the electronic sensor can be miniaturized.

Claims (2)

In the key ring having a loss-proof electronic sensor to prevent loss by providing a resonant circuit that absorbs radio waves emitted from the gate of the entrance when passing through the entrance, It is provided with an outer case 32 having a key fixed to an outer circumferential surface and having an inner space, and an inner case 31 accommodated inside the outer case 32. The inner case 31 has a core (5), a coil (1) wound around the core (5) and sequentially coated with an insulating layer and an adhesive layer on the outer periphery thereof, and hot-melt-bonding between adjacent adhesive layers during winding; Key ring with a loss-proof electronic sensitive sensor, characterized in that the electronic sensor is formed by the molding (60) is connected to the coil (1) and the capacitance (4) constituting a resonant circuit. The key with an anti-lost sensor according to claim 1, further comprising a band (50) for interconnecting them between the outer case (32) and the key and being stored on a wrist or ankle. ring.