KR102359956B1 - Switch - Google Patents

Abstract

A switch according to an embodiment of the present invention includes a main body; and an actuator for inducing electrical switching of the main body by providing a magnetic force to the main body. The main body, a first case; and a pair of reed switches disposed in the first case. The actuator may include a second case; a magnetic plate disposed in the second case; a pair of seating grooves formed on one surface of the magnetic plate and spaced apart from each other in the longitudinal direction of the magnetic plate; and a pair of magnets seated in the seating groove.

Description

switch{SWITCH}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to switches and, more particularly, to non-contact switches.

A switch is a device that controls the flow of current. For the stability of the system, the power supply and the actuator can be separated, and the switch electrically connects the power supply and the actuator.

As one type of switch, there is a non-contact type switch using magnetic force. Non-contact switches do not have mechanical contacts, so there is no wear between contacts, so durability is good, and dust due to wear does not occur, so it is suitable for environments that require dust protection.

Korean Patent Registration No. 10-0318820 (Registered on Jan. 13, 2001) Korean Patent Registration No. 10-0949429 (Registered on March 17, 2010)

An object of the present invention is to provide a switch with improved operational reliability.

A switch according to an embodiment of the present invention includes a main body; and an actuator for inducing electrical switching of the main body by providing a magnetic force to the main body, wherein the main body includes: a first case; and a pair of reed switches disposed in the first case, wherein the actuator includes: a second case; a magnetic plate disposed in the second case; a pair of seating grooves formed on one surface of the magnetic plate and spaced apart from each other in the longitudinal direction of the magnetic plate; and a pair of magnets seated in the seating groove, wherein the second case includes: a second housing having an open upper surface; and a second cap covering the open upper surface of the second housing, wherein the second cap includes: a cover part covering the open upper surface of the second housing; and an insertion part extending from the cover part and inserted into the second housing to be in close contact with the inner surface of the second housing, wherein both ends of the magnetic plate are located on two opposite surfaces of the inner surface of the insert part It is characterized in that each of the fitting grooves for sliding insertion are formed.
In addition, the switch according to an embodiment of the present invention, the body having a first surface; and an actuator having a second surface facing the first surface and providing a magnetic force to the main body to induce electrical switching of the main body, wherein the main body includes: a first case; and a pair of reed switches disposed in the first case, wherein the actuator includes: a second housing having an open upper surface; a second cap covering the open upper surface of the second housing and defining the second surface; a magnetic plate coupled to the inside of the second cap and disposed parallel to the second surface; and a pair of magnets seated at a distance from the magnetic plate, each of the pair of magnets comprising: a first pole; and a second pole defined as a pole opposite to the first pole, wherein the first pole is in close contact with the magnetic plate, and the second pole faces the second surface.

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According to a preferred embodiment of the present invention, since the magnet is seated in the seating groove of the magnetic plate, unintentional movement of the magnet can be prevented even when a pair of magnets are disposed close to each other. Thereby, the actuator of the switch can be formed compactly and operation reliability can be improved.

In addition, since the magnet contacts the magnetic plate, the magnetic field range of the magnet toward the body of the switch may be widened. Accordingly, the electrical switching reliability of the main body according to the movement of the actuator may be improved.

In addition, external noise and malfunction of the reed switch may be reduced by the biasing magnet, and the hysteresis area may be reduced. Accordingly, the operation reliability of the switch may be improved.

In addition, by arranging the reed switches to be inclined to each other, a malfunction caused by the magnetic field of the opposite magnet can be minimized and the body can be compact.

In addition, since the magnet of the actuator faces the end of the reed switch, even if the distance between the main body and the actuator is changed, the reed switch may operate normally without being repeatedly switched.

In addition, when a pair of magnets are arranged in the same polarity direction, the installation direction of the actuator is not limited, so there is an advantage that two-way fastening is possible.

In addition, the present invention has various effects that can be understood by those skilled in the art from the disclosed configuration.

1 is a diagram illustrating an example in which a switch according to an embodiment of the present invention operates.
2 is a perspective view illustrating an exterior of a switch according to an embodiment of the present invention.
3 is an exploded perspective view of a body according to an embodiment of the present invention.
4 is a cross-sectional view taken along line A-A' of FIG. 2 .
5 is a cross-sectional view taken along line B-B' of FIG. 2 .
6 is a cross-sectional view taken along line C-C' of FIG. 2 .
7 is an exploded perspective view of an actuator according to an embodiment of the present invention.
FIG. 8 is a cut-away perspective view taken along line D-D' of FIG. 2 .
9 is a cross-sectional view taken along line E-E' of FIG. 2 .
10 is a view showing the magnetic force line distribution of the magnet according to the presence or absence of the magnetic plate.
11 is a view for explaining the operation of a switch according to an embodiment of the present invention.
12A and 12B are views for explaining the operation of the reed switch shown in FIG. 11 .
13 is a view for explaining the operation of a switch according to another embodiment of the present invention.
14A and 14B are views for explaining the operation of the reed switch shown in FIG. 13 .
15A to 15C are diagrams for explaining the operation of the biasing magnet.

Hereinafter, specific embodiments of the present invention will be described in detail with drawings.

Hereinafter, when an element is described as being "fastened" or "connected" to another element, it means that two elements are directly fastened or connected, or there is a third element between the two elements and two elements are connected by the third element. It may mean that elements are connected or fastened to each other. On the other hand, when it is described that one element is "directly fastened" or "directly connected" to another element, it may be understood that a third element does not exist between the two elements.

1 is a diagram illustrating an example of an operation of a switch according to an embodiment of the present invention, and FIG. 2 is a perspective view showing an exterior of the switch according to an embodiment of the present invention.

The switch 10 according to the present invention includes a body 100 and an actuator 200 . The body 100 and the actuator 200 may not contact each other. The actuator 200 may induce electrical switching of the main body 100 by providing a magnetic force to the main body 100 .

The main body 100 may be installed in the fixture F, and the actuator 200 may be installed in the movable object M capable of moving relative to the fixture F. For example, the actuator 200 may move in a direction parallel to the z-axis shown in FIG. 2 with respect to the main body 100 .

According to the movement of the moving object M, the actuator 200 may move away from or closer to the main body 100, and electrical switching of the main body 100 may be performed by a change in the magnetic field of the actuator 200. For example, if the fixed object F is a wall and the moving object M is a door, the switch 10 may detect opening and closing of the door according to electrical switching of the main body 100 .

A cable 300 may be connected to the body 100 . The cable 300 may electrically connect the main body 100 and an external electronic device (not shown).

Hereinafter, for convenience of explanation, a case in which the x-axis shown in FIG. 2 is parallel to the left-right direction, the y-axis is parallel to the front-back direction, and the z-axis is parallel to the vertical direction will be described as an example. However, it is obvious that the present invention is not limited thereto.

Each of the body 100 and the actuator 200 may have a substantially box shape. In more detail, each of the main body 100 and the actuator 200 includes a surface (eg, front) and the other surface (eg, rear) facing opposite to each other, and a circumferential surface connecting the one surface and the other surface. can

When the main body 100 and the actuator 200 are arranged as shown in FIG. 2 , the first surface 101 of the main body 100 and the second surface 201 of the actuator 200 may face each other. The first surface 101 may be included in the peripheral surface of the main body 100 , and the second surface 201 may be included in the peripheral surface of the actuator 200 .

3 is an exploded perspective view of a body according to an embodiment of the present invention, FIG. 4 is a cross-sectional view taken along line A-A' of FIG. 2, FIG. 5 is a cross-sectional view taken along line B-B' of FIG. 2, and FIG. 2 is a cross-sectional view taken along C-C'.

The body 100 may include first cases 110 and 120 that form an exterior.

In more detail, the first cases 110 and 120 include a first housing 110 having an open surface (eg, a bottom surface), and a first cap covering the open surface of the first housing 110 ( 120) may be included.

In more detail, a portion of the circumferential surface of the first housing 110 may be opened to form an opening, and the first cap 120 may be fitted to the opening.

The first surface 101 (refer to FIG. 2 ) of the body 100 described above may be included in the first cap 120 . However, the present invention is not limited thereto, and it is of course possible that the first surface 101 is included in the first housing 110 .

The first cap 120 includes a cover part 121 that covers an open surface of the first housing 110 , and an insertion part 122 connected to the cover part 121 and inserted into the first housing 110 . may include The cover part 121 and the insertion part 122 may be integrally formed, but is not limited thereto.

The cover part 121 may cover the lower end of the first housing 110 from the lower side or may be in contact with the inner circumference of the lower end of the first housing 110 .

The insertion part 122 may have a hollow cylindrical shape protruding from the edge of the cover part 121 toward the first housing 110 . The outer circumference of the insertion part 122 may be in contact with or adjacent to the inner circumference of the first housing 110 . Alternatively, a separate seal may be provided between the outer circumference of the insertion part 122 and the inner circumference of the first housing 110 . Accordingly, airtightness between the first housing 110 and the first cap 120 may be improved.

A plurality of locking projections 123 formed along the outer circumference of the first cap 120 may be formed on the first cap 120 . In addition, a plurality of locking grooves (not shown) formed along the inner circumference of the first housing 110 and through which the locking protrusions 123 are caught may be formed on the inner surface of the first housing 110 . However, the present invention is not limited thereto, and the locking protrusion 123 may be formed as a single annular protrusion elongated along the outer circumference of the first cap 120 . Likewise, the locking groove may be formed as a single annular groove elongated along the inner circumference of the first housing 110 .

Accordingly, the operator can easily assemble the first housing 110 and the first cap 120 without a separate fastening member or tool.

At least one fastening hole 111 for fastening the main body 100 to the fixture F may be formed in the first cases 110 and 120 , more specifically, the first housing 110 . For example, a pair of fastening holes 111 may be formed spaced apart from one another. A fastening member such as a screw may be fastened to the fixture F through the fastening hole 111 .

The fastening hole 111 may be formed to penetrate from one surface of the first housing 110 to the other surface. In more detail, the fastening hole 111 includes a first recessed part 111a formed on one surface of the first housing 110 , a second recessed part 111b formed on the other surface of the first housing 110 , and the A through hole 111c penetrating from the first depression 111a to the second depression 111b may be included.

An inner cross-sectional area of the first recessed portion 111a may be larger than an inner cross-sectional area of the through hole 111c. That is, the inner circumference of the first recessed portion 111a and the inner circumference of the through hole 111c may have a step difference.

Also, an inner cross-sectional area of the second recessed portion 111b may be larger than an inner cross-sectional area of the through hole 111c. The inner circumference of the second recessed portion 111b and the inner circumference of the through hole 111c may be different from each other.

The head portion of the fastening member (not shown) passing through the fastening hole 111 may be accommodated in the first recessed part 111a or the second recessed part 111b. Therefore, the main body 100 is capable of bidirectional fastening to the fixture (F).

A cable connection hole 114 through which the cable 300 is connected may be formed in the first case 110 , 120 , and in more detail, the first housing 110 . The cable connection hole 114 may be formed on a circumferential surface of the first housing 110 . The cable 300 connected to the cable connection hole 114 may be electrically connected to the substrate 130 to be described later.

Meanwhile, the main body 100 may include a pair of reed switches 140 disposed inside the first cases 110 and 120 . The body 100 may further include a substrate 130 to which the reed switch 140 is connected.

The reed switch 140 may perform electrical switching according to a change in the magnetic field by the actuator 200 . The reed switch 140 may be disposed on one surface (eg, the front surface) of the substrate 130 .

A pair of reed switches 140 may be provided. The pair of reed switches 140 may be disposed symmetrically with respect to the left and right directions. The pair of reed switches 140 may be disposed to be inclined in a direction in which a distance from each other increases toward the first cap 120 side. Accordingly, the reed switch 140 can be efficiently disposed in the limited space inside the first cases 110 and 120 .

A detailed operation of the reed switch 140 will be described later in detail.

The substrate 130 may be mounted inside the first cases 110 and 120 . The substrate 130 may be vertically disposed. A portion of the substrate 130 may be located inside the first housing 110 , and another portion of the substrate 130 may be located inside the insertion part 122 of the first cap 120 .

At least one cut-off part 131 may be formed on the substrate 130 . The cut-off part 131 may have a shape such that a portion of the edge of the substrate 130 is cut off.

The cut-off part 131 may be formed at a position avoiding the fastening hole 111 of the first housing 110 . Accordingly, the substrate 130 may not interfere with the fastening hole 111 and the fastening member passing therethrough.

Guide ribs 125 for guiding the sliding of the substrate 130 may be formed on inner surfaces of the first cases 110 and 120 . In more detail, a pair of guide ribs 125 spaced apart from each other may be formed on both inner surfaces of at least one of the first cap 120 or the first housing 110 , and the substrate 130 is a pair of It can be inserted between the guide ribs 125 of the.

By the guide rib 125 , the operator can easily recognize the mounting position of the substrate 130 with respect to the first cases 110 and 120 , and easily attach the substrate 130 to the first housing 110 . It can be inserted or separated by sliding.

The substrate 130 may be locked to the first cap 120 . The operator may fasten the first cap 120 in the locked state of the substrate 130 to the first housing 110 .

In more detail, at least one locking groove 132 may be formed in the substrate 130 , and a locking portion 124 fitted to the locking groove 132 may be formed on the inner surface of the first cap 120 . have.

In more detail, the locking grooves 132 may be formed on both edges of the substrate 130 . The locking part 124 may be formed on the inner surface of the first cap 120 . The locking part 124 may be formed to protrude inward from both inner surfaces of the insertion part 122 .

The locking part 124 may be positioned between the pair of guide ribs 125 . Accordingly, when the substrate 130 slides between the pair of guide ribs 125 , the locking part 124 may be caught in the locking groove 132 of the substrate 130 .

However, a configuration in which a locking portion is formed on the substrate 130 and a locking groove is formed on the inner surface of the first cap 120 may also be possible.

Also, the substrate 130 may be locked to the first housing 110 instead of the first cap 120 . In this case, the operator may fasten the substrate 130 to the first housing 110 in a locked state to the first cap 120 .

7 is an exploded perspective view of an actuator according to an embodiment of the present invention, FIG. 8 is a cutaway perspective view taken along line D-D' of FIG. 2, and FIG. 9 is a cross-sectional view taken along line E-E' of FIG. 2 .

The actuator 200 may include second cases 210 and 220 forming an exterior.

In more detail, the second cases 210 and 220 include a second housing 210 having an open surface (eg, an upper surface), and a second cap covering the open surface of the second housing 210 ( 220) may be included.

In more detail, a portion of the circumferential surface of the second housing 210 may be opened to form an opening, and the second cap 220 may be fitted to the opening.

The second surface 201 (refer to FIG. 2 ) of the actuator 200 described above may be included in the second cap 220 . However, the present invention is not limited thereto, and it is of course possible that the second surface 201 may be included in the second housing 210 .

The second cap 220 includes a cover portion 221 covering the open surface of the second housing 210 and an insertion portion 222 connected to the cover portion 221 and inserted into the second housing 210 . may include The cover part 221 and the insertion part 222 may be integrally formed, but is not limited thereto.

The cover part 221 may cover the upper end of the second housing 210 from the upper side or may be in contact with the inner circumference of the upper end of the second housing 210 .

The insertion part 222 may have a hollow cylindrical shape protruding from the edge of the cover part 221 toward the second housing 210 . The outer circumference of the insertion part 222 may be in contact with or adjacent to the inner circumference of the second housing 210 . Alternatively, a separate seal may be provided between the outer circumference of the insertion part 222 and the inner circumference of the second housing 210 . Accordingly, airtightness between the second housing 210 and the second cap 220 may be improved.

A plurality of locking protrusions 223 formed along the outer circumference of the second cap 220 may be formed on the second cap 220 . In addition, a plurality of locking grooves 219 formed along the inner circumference of the second housing 210 and through which the locking protrusions 223 are caught may be formed on the inner surface of the second housing 210 . However, the present invention is not limited thereto, and the locking protrusion 223 may be formed as a single annular protrusion elongated along the outer periphery of the second cap 220 . Similarly, the locking groove 219 may be formed as a single annular groove elongated along the inner circumference of the second housing 210 .

Accordingly, the operator can easily assemble the second housing 210 and the second cap 220 without a separate fastening member or tool.

At least one fastening hole 211 for fastening the actuator 200 to the moving object M may be formed in the second cases 210 and 220 , more specifically, the second housing 210 . For example, a pair of fastening holes 211 may be formed spaced apart from one another to the left and right. A fastening member such as a screw may be fastened to the moving object M through the fastening hole 211 .

The fastening hole 211 may be formed to penetrate from one surface of the second housing 210 to the other surface. In more detail, the fastening hole 211 includes a first recessed portion 211a formed on one surface of the second housing 210 , a second recessed portion 211b formed on the other surface of the second housing 210 , and the A through hole 211c penetrating from the first depression 211a to the second depression 211b may be included.

An inner cross-sectional area of the first recessed portion 211a may be larger than an inner cross-sectional area of the through hole 211c. That is, the inner circumference of the first recessed portion 211a and the inner circumference of the through hole 211c may have a step difference.

Also, an inner cross-sectional area of the second recessed portion 211b may be larger than an inner cross-sectional area of the through hole 211c. The inner circumference of the second recessed portion 211b and the inner circumference of the through hole 211c may be different from each other.

The head portion of the fastening member (not shown) passing through the fastening hole 211 may be accommodated in the first recessed part 211a or the second recessed part 211b. Accordingly, the actuator 200 can be coupled to the moving object M in both directions.

Meanwhile, the actuator 200 may include a pair of magnets 240 disposed inside the second cases 210 and 220 . The actuator 200 may further include a magnetic plate 230 to which a magnet 240 is attached.

The magnet 240 may generate a magnetic field for electrically switching the body 100 . The magnet 240 may be disposed on one surface (eg, an upper surface) of the magnetic plate 230 .

A pair of magnets 240 may be provided. The pair of magnets 240 may be spaced apart from each other in the longitudinal direction of the magnetic plate 230 . The pair of magnets 240 may be disposed at both ends of the magnetic plate 230 or disposed adjacent to both ends of the magnetic plate 230 .

The magnetic plate 230 may be mounted inside the second cases 210 and 220 . In more detail, the magnetic plate 230 may be mounted inside the second cap 220 . The magnetic plate 230 may be horizontally disposed.

The magnetic plate 230 may include a metal material having magnetic properties. For example, the magnetic plate may include an iron material.

A seating groove 231 in which the magnet 240 is seated may be formed in the magnetic plate 230 . The seating groove 231 may be recessed to have a step difference from one surface of the magnetic plate 230 . A pair of seating grooves 231 may be formed to be spaced apart from each other in the longitudinal direction of the magnetic plate 230 .

Due to the seating groove 231 , it is easy to determine the seating position of the magnet 240 with respect to the magnetic plate 230 , and each magnet 240 moves unintentionally by the magnetic force acting between the pair of magnets 240 . can be prevented from doing

A through hole 232 may be formed in the magnetic plate 230 . The through hole 232 may be formed through from the inside of the seating groove 231 to the other surface of the magnetic plate 230 . The through hole 232 may be formed to have a size smaller than that of the seating groove 231 .

The through hole 232 may be configured to hang the magnetic plate 230 on a support member such as a ring during a machining operation of grinding the surface of the magnetic plate 230 .

The magnetic plate 230 may be locked to the second cap 220 . The operator may fasten the second cap 220 in the locked state of the magnetic plate 230 to the second housing 210 .

In more detail, a fitting groove 224 to which the magnetic plate 230 is fitted may be formed on the inner surface of the second cap 220 . The fitting grooves 224 may be formed on both inner surfaces of the insertion part 222 of the second cap 220 . Both ends of the magnetic plate 230 may be fitted in the fitting groove 224 .

The magnet 240 may be disposed between the magnetic plate 230 and the second cap 220 . That is, a space S in which the magnet 240 is disposed may be formed between the magnetic plate 230 and the second cap 220 .

The magnet 240 may be disposed such that the direction in which both polarities are directed is perpendicular to the magnetic plate 231 . In more detail, one of both polarities of the magnet 240 may be seated in the receiving groove 231 , and the other may be disposed to face the opposite side of the magnetic plate 231 .

10 is a view showing the magnetic force line distribution of the magnet according to the presence or absence of the magnetic plate.

FIG. 10( a ) shows the distribution of magnetic force lines generated by the magnet 240 in a state in which it is arranged alone. 10( b ) shows the distribution of magnetic force lines generated by the magnet 240 arranged to be in contact with the magnetic plate 230 .

The magnetic plate 230 is disposed elongated in the x-axis direction, the magnet 240 is disposed on one side of the +z side of the magnetic plate 230, and the anode of the magnet 240 is disposed in parallel with the z-axis. In this case, it can be seen that the range of the magnetic force line generated by the magnet 240 is broadened in both directions with respect to the x-axis, widens with respect to the +z-axis direction, and is limited in the -z-axis direction.

11 is a view for explaining the operation of the switch according to an embodiment of the present invention, FIGS. 12A and 12B are views for explaining the operation of the reed switch shown in FIG.

When the main body 100 and the actuator 200 are arranged to face each other, the magnet 240 of the actuator 200 may face the end of the reed switch 140 of the main body 100 .

In more detail, the pair of reed switches 140 provided in the body 100 may include a first reed switch 140a and a second reed switch 140b spaced apart from each other. A pair of magnets 240 provided in the actuator 200 may include a first magnet 240a and a second magnet 240b spaced apart from each other.

The first magnet 240a may face an outer end of the first reed switch 140a, and the second magnet 240b may face an outer end of the second reed switch 140b. The outer ends of the reed switches 140a and 140b may refer to ends closer to the magnets 240a and 240b among both ends.

In more detail, the distance d3 between the first magnet 240a and the second magnet 240b is the distance between the inner end of the first reed switch 140a and the inner end of the second reed switch 140b ( d1), and may be closer than the distance d2 between the outer end of the first reed switch 140a and the outer end of the second reed switch 140b.

Accordingly, the reed switch 140 of the main body 100 may operate normally without being repeatedly switched according to the movement of the actuator 200 .

Polarities of the first magnet 240a and the second magnet 240b may be the same or opposite to each other. For example, as shown in FIG. 11 , the first magnet 240a and the second magnet 240b may be disposed so that the same polarity (eg, S pole) is in contact with the magnetic plate 230 . As another example, one of the first magnet 240a and the second magnet 240b may have an N pole in contact with the magnetic plate 230 and an S pole in contact with the magnetic plate 230 in the other.

Meanwhile, the reed switch 140 may include a glass tube 141 , a first lead 142 , and a second lead 143 . An inert gas is enclosed in the glass tube 141 . The first lead 142 and the second lead 143 may be made of a ferromagnetic material.

Accordingly, when the magnet 240 of the actuator 200 approaches the reed switch 140, the first lead 142 and the second lead 143 may be magnetized, and as shown in FIG. 12b, the first lead ( The contact portion 142a of the 142 and the contact portion 143a of the second lead 143 may contact each other by magnetic force.

Conversely, when the magnet 240 of the actuator 200 moves away from the reed switch 140, the first lead 142 and the second lead 143 may be returned to their original positions by the elastic restoring force, as shown in FIG. 12A As shown, the contact portion 142a of the first lead 142 and the contact portion 143a of the second lead 143 may be separated from each other. That is, the reed switch 140 according to the present embodiment may be a normally open type in which the first lead 142 and the second lead 143 are separated from each other in normal times.

13 is a view for explaining the operation of the switch according to another embodiment of the present invention, Figures 14a and 14b are views for explaining the operation of the reed switch shown in FIG.

The switch according to the present embodiment uses the contents described above except for the biasing magnet 160 and related components.

The biasing magnet 160 may be included in the body 100 . In more detail, the biasing magnet 160 may be disposed inside the first cases 110 and 120 and may be mounted on the substrate 130 .

A pair of biasing magnets 160 may be provided spaced apart from each other. The pair of biasing magnets 160 may include a first biasing magnet 160a facing the first lead switch 140a and a second biasing magnet 160b facing the second lead switch 140b. have.

The biasing magnet 160 may be disposed such that one polarity faces the reed switch 140 . The biasing magnet 160 may be disposed such that a direction in which both polarities are directed is orthogonal to a longitudinal direction of the reed switch 140 .

In more detail, one polarity (eg, S pole) of the biasing magnet 160 may face the reed switch 140 , and the other polarity (eg, N pole) is opposite to the reed switch 140 . direction can be directed.

Also, the biasing magnet 160 may be eccentric to one side with respect to the longitudinal direction of the reed switch 140 . That is, the biasing magnet 160 may be disposed closer to any one of both ends of the reed switch 140 . For example, the biasing magnet 160 may be disposed closer to the inner end of the reed switch 140 than the outer end.

Also, the biasing magnet 160 may be disposed outside the reed switch 140 . In more detail, the biasing magnet 160 may be positioned between the reed switch 140 and the edge of the substrate 130 .

The biasing magnet 160 may bias the magnetization of the reed switch 140 . Accordingly, the reed switch 140 magnetized by the biasing magnet 160 may be electrically switched only when the magnet 260 having a polarity corresponding to the magnetization direction approaches.

In more detail, the biasing magnet 160 is disposed so that one polarity (eg, S pole) faces the reed switch 140 , and the magnet 240 of the actuator 200 is opposite to the one polarity. A polarity (eg, N pole) may be seated in the seating groove 231 of the magnetic plate 230 . That is, the polarity of the biasing magnet 160 facing the reed switch 140 and the polarity of the magnet 240 may be the same.

Accordingly, external noise and malfunction of the reed switch 140 may be reduced, and a hysteresis region may be reduced. Accordingly, the operation reliability of the switch may be improved.

In addition, the polarity of the first biasing magnet 160a toward the first reed switch 140a (eg, S pole) and the polarity of the second biasing magnet 160b toward the second reed switch 140b ( For example, the S poles) may be the same. Accordingly, the polarity directions of the pair of magnets 240a and 240b provided in the actuator 200 may be the same.

Accordingly, the installation direction of the actuator 200 with respect to the moving object M (refer to FIG. 1) is not limited, so there is an advantage that bidirectional fastening is possible.

Meanwhile, the reed switch 140 according to the present embodiment may further include a third lead 144 . The first lead 142 may alternatively contact the second lead 143 and the third lead 144 . When the first lead 142 is connected to the second lead 143, the reed switch 140 may be closed, and when the first lead 142 is connected to the third lead 144, the reed switch 140 is open. can be Even when an external magnetic field approaches, the contact portion 144a of the third lead may maintain non-magnetization.

The reed switch 140 according to the present embodiment is a normal open type in which the first lead 142 is in contact with the third lead 144 in normal times, or the first lead 142 is the second lead ( 143) may be of a normal close type.

By the magnetic field of the biasing magnet 160 , the normally open type reed switch may operate like a normally closed type reed switch, and the normally closed type reed switch may operate like a normally closed type reed switch.

Hereinafter, a case in which the reed switch 140 is a normally open type will be described as an example.

14A, the contact portion 142a of the first lead 142 and the contact portion 143a of the second lead 143 may maintain contact with each other by the magnetic field of the biasing magnet 160 have.

When the magnet 240 of the actuator 200 approaches the reed switch 140, the magnetic field of the magnet 240 and the magnetic field of the biasing magnet 160 destructively interfere with the first lead 142 and the second lead 143. The magnetic force between them may not work. Since the reed switch 140 is a normally open type, as shown in FIG. 14B , the contact portion 142a of the first lead 142 is connected to the contact point of the second lead 143 by the elastic restoring force of the first lead 142 . It is separated from the portion 143a and may come into contact with the contact portion 144a of the third lead 144 .

However, the presence or absence of the biasing magnet 160 and the type of the reed switch 140 may be irrelevant. That is, even if the biasing magnet 160 is not provided in the main body 100 , the reed switch 140 of the same type as in this embodiment is applied, or when the biasing magnet 160 is provided in the main body 100 . It is possible to apply the same type of reed switch 140 as the embodiment. Also, the pair of reed switches 140 may be of different types.

15A to 15C are diagrams for explaining the operation of the biasing magnet.

As described above, the biasing magnet 160 may be disposed such that the polarity direction is perpendicular to the longitudinal direction of the reed switch 140 . Accordingly, both ends of the reed switch 140 may be magnetized with the same polarity.

If, as shown in Figure 15a, the biasing magnet 160 is disposed in the center without being eccentric to one side with respect to the longitudinal direction of the reed switch 140, the contact portion 142a of the first lead 142 and Since the contact portions 143a of the second lead 143 have the same polarity, they do not contact each other and cannot maintain a closed state. That is, there is a problem that the reed switch 140 does not operate normally.

On the other hand, if the biasing magnet 160 is eccentric to one side with respect to the longitudinal direction of the reed switch 140, as shown in Figure 15b or 15c, even if both ends of the reed switch 140 have the same polarity, the bias In one lead close to the single magnet 160, since the magnetic force lines converge toward the biasing magnet 160 before the magnetic force lines reach the contact portion of the one lead, the contact portion 142a of the first lead 142 and the second lead The contact portions 143a of (143) may maintain a closed state by contacting each other.

That is, it can be seen that for the normal operation of the reed switch 140 , the biasing magnet 160 must be eccentrically disposed to one side with respect to the longitudinal direction of the reed switch 140 .

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments.

The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (12)

main body; and
An actuator for inducing electrical switching of the main body by providing a magnetic force to the main body,
The body is
first case; and
A pair of reed switches disposed in the first case,
The actuator is
second case;
a magnetic plate disposed in the second case;
a pair of seating grooves formed on one surface of the magnetic plate and spaced apart from each other in the longitudinal direction of the magnetic plate; and
It includes a pair of magnets seated in the seating groove,
The second case is
a second housing having an open upper surface; and
a second cap covering the open upper surface of the second housing;
The second cap is
a cover part covering the open upper surface of the second housing; and
and an insertion part extending from the cover part and being inserted into the second housing to be in close contact with the inner surface of the second housing,
The switch according to claim 1, wherein fitting grooves through which both ends of the magnetic plate are slidably inserted are formed on two opposite surfaces of the inner surface of the insertion unit. The method of claim 1,
A plurality of locking projections formed along the outer peripheral edge of the second cap,
The switch further comprises a plurality of locking grooves formed along the inner surface of the second housing and into which the plurality of locking projections are inserted. The method of claim 1,
The actuator is
The switch further comprising a through hole penetrating from the inside of the seating groove to the other surface of the magnetic plate. The method of claim 1,
The body is
A switch disposed inside the first case and further comprising a pair of biasing magnets for biasing the magnetization of the pair of reed switches. 5. The method of claim 4,
The pair of biasing magnets are arranged such that one polarity faces the reed switch,
The pair of magnets is a switch disposed so that the other polarity opposite to the one polarity is seated in the seating groove. 5. The method of claim 4,
The biasing magnet is a switch eccentric to one side with respect to the longitudinal direction of the reed switch. The method of claim 1,
A distance between the pair of magnets is greater than a distance between one end of the pair of reed switches and closer than a distance between the other ends of the pair of reed switches. The method of claim 1,
When the main body and the actuator face each other, the magnet is directed toward the end of the reed switch. a body having a first surface; and
An actuator having a second surface facing the first surface and providing a magnetic force to the main body to induce electrical switching of the main body,
The body is
first case; and
A pair of reed switches disposed in the first case,
The actuator is
a second housing having an open upper surface;
a second cap covering the open upper surface of the second housing and defining the second surface;
a magnetic plate coupled to the inside of the second cap and disposed parallel to the second surface; and
Including a pair of magnets seated at a distance from the magnetic plate,
Each of the pair of magnets,
first pole; and
a second pole defined as a pole opposite to the first pole;
The first pole is in close contact with the magnetic plate,
and the second pole faces the second face. 10. The method of claim 9,
A switch further comprising a pair of biasing magnets mounted on each of the pair of reed switches. 11. The method of claim 10,
In a state in which the main body is mounted on a fixed object and the actuator is mounted on a moving object, each of the pair of reed switches comprises:
a first portion facing the pair of magnets;
a second part corresponding to the opposite side of the first part;
and the pair of biasing magnets overlies the second portion. 12. The method of claim 11,
Each of the pair of biasing magnets,
first pole,
and a second pole opposite to the first pole;
the second pole rests on the second part,
The switch, characterized in that the pair of magnets and the pair of biasing magnets are disposed in a form in which the same polarity faces each other.

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