KR101751532B1 - Fixing device for insect net of invarsion alarm system based on magnetic field sensing - Google Patents

Abstract

The present invention can easily and firmly fix a magnetic field generator constituting an intrusion alarm system based on a magnetic field sensing based on security and theft without any damage or damage to the insect screen, The present invention relates to an immobilizer fixing device for an insect alarm system based on a magnetic field sensing, which can improve the practicality of the electric motor, According to the present invention, there is provided an apparatus for fixing an insect alarm in a system for informing an intrusion alert through a change in magnetic field, comprising: a magnetic field generating member; A receiving body for receiving the magnetic field generating member; And a fixed unit coupled to at least one unit network of the insect control network and fixing the receptacle body to the insect netting network.

Description

TECHNICAL FIELD [0001] The present invention relates to a fixed device for an insect alarm in an intrusion alarm system based on magnetic field sensing,

The present invention relates to a security apparatus for an insect alarm system based on magnetic field sensing, and more particularly, to a security apparatus for an insect alarm system based on a magnetic field sensing, And can be easily detached from the screen when maintenance is required, and can be easily changed in polarity depending on the application environment, so that the practicality can be improved by using a magnetic field sensing based intrusion alarm system To an insect screen fixing device.

While social stability is improving day by day, crime of residential crime occurs more than 150,000 a year, and the number of one-room, multi-family house, multi-family house increases, This is being explored.

The measures to prevent such a house intrusion are classified into a physical method and an alarm method using a security sensor.

The physical method of installing a security window made of iron or aluminum on a window has a solid structure, but is inconvenient to install and disassemble, damages a building aesthetic, can be damaged by an intruder with proper equipment, There is a disadvantage in that it may interfere with safety when a fire occurs.

On the other hand, the alarm system detects the destruction, breakage, opening and closing of the window by the sensor and sounds the visual and audible alarm on the field or remote place.

For example, Korean Patent No. 10-1626452 discloses an intrusion alarm system based on magnetic field sensing that detects an intrusion by analyzing a pattern of a magnetic field.

However, in such an intrusion alarm system based on magnetic field sensing, a sensing component such as a magnetic field generating component such as a magnet or a sensor for sensing a magnetic field is installed in a window and a window frame, respectively. If the installation object is a solid configuration such as a window or a window frame, However, if the object to be installed is relatively unstable, such as an insect-proofing net, it is not possible to securely install the constituent part to be installed therein, and even if installed, the insect screening network is not damaged, To be maintained.

Further, in the case of a magnet generating a magnetic field, there is a difference in interaction with the sensing unit depending on the position and direction of the polarity, and therefore, the magnet must be installed in an optimal state in consideration of the installation environment and the relationship with the sensing unit.

(Document 1) Korean Patent No. 10-1626452 (published May 11, 2016) (Document 2) Korean Published Patent Application No. 10-2012-0019558 (published on Mar. 07, 2012)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a magnetic field generating unit, which is used for security and theft prevention, And an object of the present invention is to provide a fixed device for an insect screen of an intrusion alarm system based on a magnetic field sensing.

The present invention also provides a magnetic field sensing based intrusion alarm system which can easily be separated from an insect control network when maintenance or the like is required, There is another purpose in providing the device.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus and method for controlling the same.

According to another aspect of the present invention, there is provided an apparatus for fixing an insect alarm in a system for informing an intrusion alert through a change in magnetic field, comprising: a magnetic field generating member; A receiving body for receiving the magnetic field generating member; And a fixed unit coupled to at least one unit network of the insect control network and fixing the receptacle body to the insect netting network.

According to the present invention, it is preferable that the magnetic field generating member is constituted by a magnet having right and left or upper and lower split polarities, a through hole is formed at a central portion, the receiving body is formed as a hollow body opened on one side, The fixing unit includes a cover member having a rotary knob formed on one surface thereof and fixed to an opening surface of the receiving body, and a coil spring-type fixing member extending from the cover member and passing through the through- can do.

In the present invention, the accommodating body may further include an annular boss portion through which the fixing member of the fixed unit passes, and an outer side thereof is inserted into the through hole of the magnetic field generating member.

In the present invention, it is preferable that the magnetic field generating member is constituted by a magnet having right and left or upper and lower split polarities, and the receiving body is formed as a one-side opened housing in which the cover member is detachably fixed, And a knob member coupled to one end of the fixing member, wherein the fixing member has a shape of a coil spring provided on the inner side of the housing.

In the present invention, it is preferable that the fixing member has a coil end spaced apart.

In the present invention, the outer surface of the receiving body may be provided with a polarity display unit for indicating the polarity of the magnetic field generating member.

In the present invention, the accommodating body may further include a frictional force increasing member on a surface facing the insect shield, and a plurality of contact protrusions may be formed on the frictional force increasing member.

In the present invention, a plurality of contact protrusions may be formed on a surface of the receiving body opposite to the insecting net.

According to the security apparatus for an insect screen of the intrusion alarm system based on magnetic field sensing according to the present invention, the following effects can be obtained.

First, the magnetic field generating component of the intrusion alarm system based on magnetic field sensing used for safety and theft prevention can be installed without damaging or damaging the screen guard.

Second, the present invention can be easily and firmly fixed to the screening net which is relatively difficult to be damaged due to its relatively low rigidity.

Third, the present invention can be easily separated from an insect control network, and polarity can be easily recognized and converted according to an applied environment, thereby improving practicality.

The effects of the present invention are not limited to those mentioned above, and other solutions not mentioned may be clearly understood by those skilled in the art from the following description.

FIG. 1 is an exploded perspective view showing a fixing device for an insect screen of an intrusion alarm system based on a magnetic field sensing according to a first embodiment of the present invention.
2 is a front view showing a fixed unit constituting a securing apparatus for an insect screen of an intrusion alarm system based on a magnetic field sensing according to a first embodiment of the present invention.
3 is a view showing an embodiment of a magnet which is a magnetic field generating member constituting a fixing device for an insect screen of an intrusion alarm system based on a magnetic field sensing according to a first embodiment of the present invention.
FIG. 4 is a view showing an embodiment of a receiving body constructed in accordance with an embodiment of the magnetic field generating member of FIG. 3;
5 is a view showing another embodiment of a magnet which is a magnetic field generating member constituting a securing apparatus for an insect screen of an intrusion alarm system based on a magnetic field sensing according to a first embodiment of the present invention.
FIG. 6 is a view showing another embodiment of a receiving body constructed according to another embodiment of the magnetic field generating member of FIG. 5;
7 is a side view of a state in which an insect trap fixing apparatus of an intrusion alarm system based on a magnetic field sensing according to the first embodiment of the present invention is installed in an insect trap network.
FIG. 8 is an installation state diagram illustrating a state in which the securing apparatus for an insect trapping network of the intrusion alarm system based on the magnetic field sensing is installed in the insecting net according to the first exemplary embodiment of the present invention.
FIG. 9 is a schematic view for explaining detection sensitivity according to a direction of a magnetic field generating member when a magnetic field sensing based intrusion alarm system including an insect trap fixing apparatus according to the present invention is installed.
10 is an exploded perspective view showing a securing apparatus for an insect-net in an intrusion alarm system based on a magnetic field sensing according to a second embodiment of the present invention.
11 is a rear side perspective view showing a securing apparatus for an insect-control network of an intrusion alarm system based on a magnetic field sensing according to a second embodiment of the present invention.
FIG. 12 is a side view of a state in which a fixing device for an insect trapping network of an intrusion alarm system based on a magnetic field sensing according to a second embodiment of the present invention is installed in an insect screening network.
FIG. 13 is an installation state diagram illustrating a state in which an insect trap fixing apparatus of an intrusion alarm system based on a magnetic field sensing is installed in an insect screen according to a second embodiment of the present invention.

Further objects, features and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.

Before describing the present invention in detail, it is to be understood that the present invention is capable of various modifications and various embodiments, and the examples described below and illustrated in the drawings are intended to limit the invention to specific embodiments It is to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, the terms " part, "" unit," " module, "and the like, which are described in the specification, refer to a unit for processing at least one function or operation, Software. ≪ / RTI >

In the following description with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an immobilizer fixing device of a magnetic field sensing based intrusion alarm system according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 to 8, a securing apparatus for an insect screen of an intrusion alarm system based on a magnetic field sensing according to a first embodiment of the present invention will be described in detail. FIG. 1 is an exploded perspective view showing a securing apparatus for an insect screen of an intrusion alarm system based on a magnetic field sensing according to a first embodiment of the present invention, FIG. 2 is a perspective view of a penetration warning system based on a magnetic field sensing according to a first embodiment of the present invention, 3 is a front view showing a fixed unit constituting an insect screen fixing apparatus according to the first embodiment of the present invention. Fig. 3 is a perspective view of a magnet as a magnetic field generating member constituting a securing apparatus for an insect screen of an intrusion alarm system based on a magnetic field sensing based on the first embodiment of the present invention Fig. 4 is a view showing an embodiment of a receiving body constructed according to an embodiment of the magnetic field generating member of Fig. 3. Fig. 5 is a view showing another embodiment of a magnet which is a magnetic field generating member constituting a fixing device for an insect screen of an intrusion alarm system based on a magnetic field sensing according to the first embodiment of the present invention, Fig. 5 is a view showing another embodiment of a receiving body constructed according to another embodiment of the present invention. FIG. 7 and FIG. 8 are respectively a side view and a side view of a state in which an insect trap fixing apparatus of an intrusion alarm system based on a magnetic field sensing according to a first embodiment of the present invention is installed in an insect trap network.

As shown in FIGS. 1 to 8, the fixing device for an insect screen of the intrusion warning system based on the magnetic field sensing according to the first embodiment of the present invention includes a magnetic field generating member 100 having N and S poles and generating a magnetic field, ; A receiving body 200 in the form of an enclosed one-sided enclosure for receiving the magnetic field generating member 100; 7 and 8) through the magnetic field generating member 100 and the receiving body 200 so as to cover the opening face of the receiving body 200 in which the magnetic field generating member 100 is housed. And a fixing unit 300 coupled to at least one of the unit nets of the receiving body 200 to fix the receiving body 200 to the insecting net 10.

As shown in FIG. 3, the magnetic field generating member 100 may be constituted by magnets having right and left split polarities (that is, polarities divided into N and S poles in plan view) as shown in FIG. 3, And a magnet having upper and lower split polarities (i.e., polarities divided into N and S poles in the vertical direction).

Here, the magnetic field generating member 100 has a through hole 110 through which a mounting member (to be described later) of the fixing unit 300 passes.

The magnetic field generating member 100 is not limited to a magnet and is not particularly limited as long as it has a polarity and a magnetic field generating structure.

In addition, the magnetic field generating member 100 may have a circular or polygonal cross-sectional shape, and is preferably formed in a shape corresponding to a receiving body.

The receiving body 200 is formed with a through-hole (not shown) through which a mounting member of the fixing unit 300, which will be described in detail below, is passed.

A polarity display unit 210 is formed on the outer surface of the receiving body 200 to indicate the polarity of the magnetic field generating member 100 received in the receiving body 200.

An annular boss portion 220 extending upward from a through hole (not shown) is formed on the inside of the receiving body 200. A fixing member of the fixing unit 300 is guided through the inner surface of the annular boss unit 220 and the magnetic field generating member 100 is inserted into the outer surface of the annular boss unit 200 to generate a magnetic field Thereby stably supporting the member 100.

The receiving body 200 may be formed in a shape corresponding to the shape of the magnetic field generating member 100, for example, a circular or polygonal section, and may be formed of a resin material in consideration of preparation and light weight .

The accommodating body 200 may further include a frictional force increasing member 230 (see FIGS. 4, 6, and 8) on its back surface to enhance adhesion and fixability when the inserting body 200 is fixedly installed on the insecting net.

The frictional force increasing member 230 may be formed of a rubber plate and fixed to the back surface of the receiving body 200 with an adhesive or the like. The frictional force increasing member 230 includes a plurality of contact protrusions 231 formed therein to position the accommodating body 200 in the insect control net 10 and then fix the fixation member of the fixation unit 300, The body 231 is caught by the insect control net 10 so that the receiving body 200 is not rotated.

The contact protrusions 231 are formed by a plurality of contact protrusions each having a plurality of contact protrusions each having four orientations in the formation of the contact protrusions 231. The inserting body 200 is provided with the insecting net 10, The contact protrusions 231 of one group are fitted to the intersecting portions of the insecting net 10 to prevent the rotation of the receiving body 200 and to firmly fix the contact protrusions 231 firmly to the insecting net, It can be fixed.

The contact protrusion 231 may be integrally formed on the back surface of the receiving body 200 without the frictional force increasing member 230.

Next, the fixing unit 300 includes a cover member 310 on which a rotary knob 311 is formed on the exposed surface, and a fixing member 320 in the form of a coil spring extending from the cover member 310.

2) is formed on the inner surface (opposite surface of the exposed surface) of the cover member 310 so that one end of the fixing member 320 in the form of a coil spring is prevented from being in a forced- The fixing boss portion 312 and the cover member 310 are insert-molded into the fixing boss portion 312 in a state in which one end of the coil spring is inserted.

The coil spring-shaped fixing member 320 is formed such that the coil end 321 is spaced by a predetermined distance and facilitates the initial fitting by the coil end 321 spaced apart when the coil spring- .

The coil spring-type fixing member 320 is formed of a compression coil spring having a contractive force, and the coil diameter thereof is formed to be larger than the size of the unit mesh of the screening network. Preferably, .

Meanwhile, the fixing device for an insect screen of the intrusion alarm system based on the magnetic field sensing according to the first embodiment of the present invention includes a positioning device 200 for stably holding or fixing the position of the magnetic field generating member 100 in the receiving body 200 (Not shown).

The positioning means may include a guide groove formed in one of the magnetic field generating member 100 and the receiving body 200 and a guide protrusion formed in the other of the magnetic field generating member 100 and the receiving body 200 Lt; / RTI > Here, it is preferable that the guide groove and the guide protrusion are formed at a boundary portion that divides the polarity of the magnetic field generating member 100.

When the magnetic field generating member 100 is detachable from the receiving body 200 and the polarity of the magnetic field generating member 100 is adjusted, ) And can be separated and executed.

In addition, another example of the positioning means may be an adhesive layer or an adhesive for fixing the magnetic field generating member 100 to the inside of the receiving body 200. These other examples of the adhesive layer or the adhesive may be applied to the above example to be completely fixed.

9 is a schematic view for explaining the sensing sensitivity according to the direction of the magnetic field generating member in the case where the intrusion alarm system based on the magnetic field sensing including the securing apparatus for insect screens according to the present invention is installed. Is mounted at a position spaced apart from the magnetic field generating member (100) within a polarity direction and a range capable of accurately sensing the magnetic field of the generating member (100).

9 (a) shows a case where the polarity direction of the magnetic field generating member constituting the insect trap fixation device according to the present invention is installed so as to accurately detect the magnetic field sensor S, and it is sensitive to the motion of the window 9B shows an example in which the magnetic field generating member constituting the securing apparatus for insect screening network according to the present invention is insensitive to the movement of the window when the magnetic field generating member is attached to the insect screening network.

In this way, in the intrusion alarm system based on the magnetic field sensing, it is important to establish the polarity direction of the magnetic field generating member, and confirmation and adjustment are very important matters.

10 to 13, a securing apparatus for an insect screen of an intrusion alarm system based on a magnetic field sensing according to a second embodiment of the present invention will be described in detail. In the following description of the second embodiment, the same components as those of the first embodiment described above are denoted by the same reference numerals, and a detailed description thereof will be omitted or omitted.

FIG. 10 is an exploded perspective view showing a securing apparatus for an insect screen of an intrusion alarm system based on a magnetic field sensing according to a second embodiment of the present invention, FIG. 11 is a perspective view of a penetration warning system based on a magnetic field sensing according to a second embodiment of the present invention, 12 and 13 are front and rear views, respectively, of a fixing device for an insect screening network according to a second embodiment of the present invention. It is a state of installation.

As shown in FIGS. 10 to 13, the fixing device for an insect trap network of the intrusion warning system based on the magnetic field sensing according to the second embodiment of the present invention includes a magnetic field generating member 100 having N and S poles and generating a magnetic field, ; A receiving body 200 in the form of an enclosed one-sided enclosure for receiving the magnetic field generating member 100; A cover member 400 which covers and fixes the open side of the accommodating body 200 in which the magnetic field generating member 100 is housed; And at least one unit network provided on the outer surface of the cover member 400 and coupled to at least one unit network of the insect control net 10 (see Figs. 12 and 13) to fix the receiving body 200 to the insect control net 10 And includes a fixed unit 500.

The magnetic field generating member 100 is the same as the first embodiment described above except that a through hole is not formed in the central portion thereof, so a description thereof will be omitted.

In addition, the receiving body 200 is the same as the first embodiment described above, except that a through hole (not shown) formed at the central portion thereof and an annular boss portion are not formed, and thus a detailed description thereof will be omitted.

The cover member 400 is not particularly limited as long as it can cover the opening face of the receiving body 200, and the cover member 400 is in the form of a plate.

The cover member 400 may be secured to the opening face of the receiving body 200 by various fixing means (e.g., a fixing piece, an adhesive, a detachable hook or a clamping type fixing member) It is not.

The fixing unit 500 includes at least one vertically opened housing 510 provided on the outer surface of the receiving body 200 and a fixing member 500 in the form of a coil spring provided inside the housing 510 520), and a knob member (530) coupled to one end of the fixing member (520).

When the coil end 521 is formed to be spaced by a predetermined distance and is rotationally coupled to the insect-proofing net 10 (refer to FIG. 13), the coil spring- Thereby facilitating fitting.

The coil spring-shaped fixing member 520 is formed of a compression coil spring having a contractive force, and the coil diameter thereof is formed to be larger than the size of the unit mesh of the screening network. Preferably, .

10) is formed on one side of the knob member 530 so that the one end of the fixing member 520 is fixed by an interference fit or an adhesive or the like, The knob member is insert-molded into the fixed boss portion 531 in the inserted state. Accordingly, when the knob member 530 is held and rotated, the fixing member 520 rotates in the same direction. In the drawing, the knob member 530 is formed in a plate shape.

In the drawing of the second embodiment, the fixed unit 500 is shown as being provided on the outer surface of the receiving body 200, but may be formed of two or more (preferably having a constant interval).

In the meantime, as in the first embodiment described above, the fixing device for an insect screen of the intrusion warning system based on the magnetic field sensing according to the second embodiment of the present invention can stably position the magnetic field generating member 100 in the receiving body 200 (Not shown) for holding or fixing the light emitting diode, and a detailed description thereof will be omitted for the sake of simplicity and clarity of the invention.

According to the security apparatus for an insect screen of the intrusion warning system based on the magnetic field sensing according to the present invention, the magnetic field generating unit constituting the intrusion alarm system based on the magnetic field sensing used for safety and theft prevention is damaged or damaged It is possible to easily fix it to an insect screen which is poor in rigidity and can be easily detached from an insect screen so that maintenance is excellent and advantage can be improved by easily recognizing and converting the polarity according to the application environment .

In addition, according to the fixing device for an insect-net in the intrusion alarm system based on the magnetic field sensing according to the present invention, the fixing device can be easily installed from one side of the insect- For example, if a part of the device is inserted into the insect net from one side (inner side) of the insect control net and then connected to the other side (outer side) of the insect control net using a nut or the like, There is a need to approach, and if the insect screen is large or is installed on a high level, it is difficult or dangerous to install.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Therefore, it is to be understood that the embodiments disclosed herein are not for purposes of limiting the technical idea of the present invention, but rather are not intended to limit the scope of the technical idea of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: Screening
100: magnetic field generating member
110: Through hole
200: receiving body
210: polarity display unit
220: boss part
230: frictional force increasing member
231: contact protrusion
300, 500: fixed unit
310, 400: cover member
311: Knob
312: boss part
320, 520: Fixing member
510: housing
530: Knob member

Claims (11)

delete An apparatus fixed to an insect screen in a system for notifying an intrusion alert through a change in magnetic field,
A magnetic field generating member;
A receiving body for receiving the magnetic field generating member; And
And a fixed unit coupled to at least one unit net of the screen net to fix the receiving body to the screen net,
Wherein the fixed unit includes a fixing member in the form of a coil spring that is rotationally coupled to the unit net,
Fixing device for screening of intrusion alarm system based on magnetic field sensing.
3. The method of claim 2,
Wherein the magnetic field generating member is constituted by a magnet having right and left or upper and lower split polarities, a through hole is formed at the center,
Wherein the receiving body is formed as a hollow body with one side opened and a through hole is formed at the center,
Wherein the fixing unit includes a cover member having a rotary knob formed on one surface thereof and fixed to an opening surface of the receiving body, and the fixing member extending from the cover member and passing through the through-
Fixing device for screening of intrusion alarm system based on magnetic field sensing.
The method of claim 3,
Wherein the accommodating body further includes an annular boss portion through which a fixing member of the fixed unit penetrates inside and an outer side is inserted into a through hole of the magnetic field generating member.
Fixing device for screening of intrusion alarm system based on magnetic field sensing.
3. The method of claim 2,
Wherein the magnetic field generating member is constituted by magnets having right and left or upper and lower split polarities,
Wherein the receiving body is formed as a one-side open housing in which the cover member is detachably fixed,
Wherein the fixing unit includes at least one vertically opened housing provided on an outer surface of the receiving body, and a knob member coupled to one end of the fixing member and the one end of the fixing member,
Fixing device for screening of intrusion alarm system based on magnetic field sensing.
3. The method of claim 2,
Wherein the fixing member has a coil end spaced apart from the coil end,
Fixing device for screening of intrusion alarm system based on magnetic field sensing.
6. The method according to any one of claims 2 to 5,
And a polarity display unit for indicating a polarity of the magnetic field generating member is provided on an outer surface of the receiving body.
Fixing device for screening of intrusion alarm system based on magnetic field sensing. 6. The method according to any one of claims 2 to 5,
Wherein the accommodating body is further provided with a frictional force increasing member on a surface facing the insect-
Wherein the frictional force increasing member has a plurality of contact protrusions,
Fixing device for screening of intrusion alarm system based on magnetic field sensing.
6. The method according to any one of claims 2 to 5,
Wherein the receiving body has a plurality of contact protrusions formed on a surface thereof facing the insect-
Fixing device for screening of intrusion alarm system based on magnetic field sensing.
An apparatus fixed to an insect screen in a system for notifying an intrusion alert through a change in magnetic field,
A magnetic field generating member;
A receiving body for receiving the magnetic field generating member; And
And a fixed unit coupled to at least one unit net of the screen net to fix the receiving body to the screen net,
Wherein the accommodating body is further provided with a frictional force increasing member on a surface facing the insect-
Wherein the frictional force increasing member has a plurality of contact protrusions,
Fixing device for screening of intrusion alarm system based on magnetic field sensing.
An apparatus fixed to an insect screen in a system for notifying an intrusion alert through a change in magnetic field,
A magnetic field generating member;
A receiving body for receiving the magnetic field generating member; And
And a fixed unit coupled to at least one unit net of the screen net to fix the receiving body to the screen net,
Wherein the receiving body has a plurality of contact protrusions formed on a surface thereof facing the insect-
Fixing device for screening of intrusion alarm system based on magnetic field sensing.

Images