JPH1040789A - Switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out installation without a troublesome installation work by installing a isolation wall to isolate an installation part for a magnet catch and an installation part for a circuit block in a housing and making only a circuit block water-proof. SOLUTION: A housing 5 is installed in an installation plate 40 by screwing a screw joining member such as a nut 30 in a screw groove 51g formed in the outer circumferential face of a case 51 of the housing 51. In this case, a water-proof packing 40a being set between the case 51 and the installation plate 40, the installation is carried out. The installation part 51c for a circuit block is isolated from an installation part 51b for a magnet catch by a isolation wall 51a and the space between the part 51c and the installation part 51b for a magnet catch is kept in water-proof state. Consequently, even in the case installation is carried out in a site where this apparatus is possibly splashed with water, to make a circuit block 20 water proof, with no need of making a magnet catch 10 water-proof, it is sufficient to make only the block 20 water- proof without requiring troublesome works to make the catch 10 water-proof and thus the installation work can be carried out without troublesome works.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch provided with a permanent magnet for maintaining a closed state when a door or the like is closed.

[0002]

2. Description of the Related Art Conventionally, there is a switch of this type shown in FIGS. This is a magnet catch A including a permanent magnet A ₁ and a pair of yokes A ₂ capable of adsorbing a magnetic metal body at one edge holding the permanent magnet A ₁ ,
A circuit block B consisting of circuit B ₂ flux is coupled to the electromagnetic element B ₁ and its electric transducer B ₁ is provided in a position capable of passing through the permanent magnet A ₁ between the pair of yokes A _2, magnet magnet catch respectively disposed a catch a and circuit block B arranged portion C ₁ and the circuit block for disposing portion C ₂ is provided with a housing C provided.

[0003] Specifically, the housing C is made of a cover body C ₄ to be joined to the case C ₃ and casing C _3. The housing C is formed by joining the lid C ₄ to the case C ₃ .
The opening C ₅ whereas on the side where the respective end portions of the yokes A ₂ projects, while the bottom outlet hole C ₆ to derive the electric wire B ₃ connected to the circuit block B is provided on the side C ₇ are formed in a box shape. In other words, this housing C
An opening C ₅ side of the inner space has a placement portion C ₁ magnet catch, bottom C ₇ side than the magnet catch arrangement portion C ₁ is in the arrangement portion C ₂ circuit blocks.

[0004] This one, the magnetic metal member to one edge of the yokes A ₂ is adsorbed, the magnetic flux passing through the magneto-electric conversion element B ₁ is reduced. Then, the magnetoelectric conversion element B ₁ represents, outputs an electrical signal in response to changes in magnetic flux.

[0005] This material, when installed in a location that could consuming water each sealing outlet hole C ₆ openings C ₅ and the other side of one side of the yoke A ₂ are protruding by the sealing material It is waterproofed by being stopped.

[0006]

In the above-described conventional switch, the circuit block B is waterproofed when the magnet catch A does not need to be waterproofed even when it is installed in a place where there is a danger of getting wet. In this case, the magnet catch A had to be troublesome and waterproof, and the mounting work was troublesome.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to mount a magnet catch when it is not necessary to waterproof the magnet catch even when the magnet catch is installed in a place where there is a possibility of being splashed with water. An object of the present invention is to provide a switch that does not require much work.

[0008]

According to a first aspect of the present invention, a permanent magnet and a magnetic metal member are attracted to one end edge of the permanent magnet in pairs so as to sandwich the permanent magnet. A magneto-electric conversion element which is provided at a position where magnetic flux can pass between the other ends of a pair of yokes and a magnet catch formed of a yoke and outputs an electric signal in response to a change in the magnetic flux, and the magneto-electric conversion element And a housing provided with a magnet catch arrangement portion and a circuit block arrangement portion for disposing the magnet catch and the circuit block, respectively. An isolation wall is provided for isolating the magnet catch arrangement portion and the circuit block arrangement portion from each other. Therefore, the circuit block disposing portion is separated from the magnet catch disposing portion by the separating wall, and is in a waterproof state between the circuit portion and the magnet catch disposing portion. As long as the circuit block is waterproofed, even if it is installed in a place where there is a risk of getting wet, even a magnet catch which does not necessarily need to be waterproofed does not have to be troublesomely waterproofed.

According to a second aspect of the present invention, in the first aspect, the magnet catch is provided with a gap between the magnet catch and the magnet catch disposing portion. . Therefore, the magnet catch is
Since the magnet catch is arranged in the arranging portion in a floating state, the position of one end of the yoke constituting the magnet catch can be changed.

According to a third aspect of the present invention, in the first aspect, the magnet catch and the circuit block are filled between the magnet catch arrangement portion and the circuit block arrangement portion. It is configured to have members and to be arranged respectively. Therefore, the magnetic catch disposed in the sealed state in the magnet catch disposing portion is waterproofed by sealing the yoke constituting the magnet catch and does not rust. It will be easier.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the housing has a cylindrical shape and a thread groove is provided on an outer peripheral surface thereof. . Therefore, the housing provided with the thread groove on the outer peripheral surface can be attached by a screw member such as a nut screwed into the thread groove.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the magnetoelectric conversion element is constituted by a Hall IC or a Hall element. Therefore, since both the Hall IC and the Hall element have polarities based on the magnetic flux direction, the output form of the electric signal changes by changing the forward / reverse of the mounting direction along the magnetic flux.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This switch includes yokes 1 and 1, a permanent magnet 2, a magnetoelectric conversion element 3, a circuit 4, and a housing 5.

The pair of yokes 1, 1 are each formed of a magnetic metal material into a flat plate shape, and a permanent magnet 2 is interposed therebetween.
Are sandwiched to form the magnet latch 10. One end of each of the yokes 1, 1 is a magnetic pole surface 1a, 1a capable of adsorbing a magnetic metal body (not shown).
The magneto-electric conversion element 3 having the protruding portions 1b, 1b formed at the other end thereof comprises a Hall IC 3a, and constitutes a circuit block 20 together with a circuit 4 connected to the Hall IC 3a. It is arranged at a position where magnetic flux can pass between the protruding portions 1b of the yokes 1,1. When the magnetic metal body is attracted to the magnetic pole surfaces 1a of the yokes 1,1, the magnetic flux passing through the magnetoelectric conversion element 3 decreases. Then, this magnetoelectric conversion element 3
An electric signal is output in response to a change in magnetic flux. The magnetoelectric conversion element 3 is provided with an auxiliary magnet 3b that generates a magnetic flux in a direction opposite to the magnetic flux of the permanent magnet 2 sandwiched between the pair of yokes 1,1.

The circuit 4 includes electrical components such as a resistor 4a, a diode 4b, and a light emitting diode 4c, and these electrical components are provided on a substrate 4d. The circuit 4 is connected to a cable 4e for external connection.

The housing 5 includes a substantially cylindrical case 51, a lid 52 joined to close one opening of the case 51, and a cover 53 joined to close the other opening of the case 51.
Consists of

The case 51 is provided with an isolation wall 51a for isolating one opening side and the other opening side, and a hole-shaped magnet-chat arranging portion for arranging the magnet latch 10 on the one opening side. On the other opening side, a hole-shaped circuit block disposing portion 51c for disposing the circuit block 20 is provided. More specifically, the magnet-chat arranging portion 51b is provided with a magnet-chat 10 having a gap 51d between the magnet-chat arranging portion 51b and the inner surface thereof, and each of the protrusions 1b, Housing recesses 51e for housing 1b are formed on both sides of the back. Also,
An accommodation recess 51f for accommodating the magneto-electric conversion element 3 of the circuit block 20 is formed in the center of the back part in the circuit block arrangement portion 51c.

The lid 52 is formed in a disk shape, and one end of each of the pair of yokes 1, 1 penetrates and projects through holes 52a, 52a.
A case 52a is provided, and is fixed by ultrasonic welding or the like in a state where the outer peripheral portion is wound around and joined along one opening edge of the case 51.

The cover 53 is formed in a cylindrical shape with a bottom, and a bottom thereof is provided with a lead-out hole 53a for leading out a cable and a through-hole 53b for passing through a light emitting diode. The cover 53 is filled with a filling member 6 made of resin or the like by filling the space between the cover 53 and the substrate 4d arranged near the other opening of the circuit block arrangement portion 51c. And is tightly joined to the case 51 via. Thus, when the filling member 6 is filled between the cover 53 and the substrate 4d, the circuit block 20 is placed between the cover 53 and the circuit block disposing portion 51c, more specifically, near the other opening of the circuit block disposing portion 51c. And a filling member 6 is provided between the two.

The housing 5 has a case
It is screwed into a screw groove 51g provided on the outer peripheral surface of 51 by a screwing member such as a nut 30 and attached to the mounting plate 40 or the like.
More specifically, in the present embodiment, the waterproof packing 40a is attached between the case 51 and the mounting plate 40.

In such a switch, the circuit block disposing portion 51c is separated from the magnet catch disposing portion 51b by the separating wall 51a, and the gap between the circuit block disposing portion 51b and the magnet catch disposing portion 51b is waterproof. Therefore, even if the magnet catch 10 does not need to be waterproofed even when it is installed in a place where there is a risk of splashing water, in order to waterproof the circuit block 20, it is necessary to take extra effort to waterproof the magnet catch 10 as well. Even if it is not necessary, only the circuit block 20 needs to be waterproof, so that the mounting work does not take much time.

Further, since the magnet catch 10 is provided with a gap 51d between itself and the inner surface of the magnet catch mounting portion 51b, one end edge of the yokes 1, 1 constituting the magnet catch 10 is formed. Since the position is variable, even if there is some error in the positional relationship with the magnetic metal body, the yoke
By moving the position of the one end of the yoke in a direction in which the error is reduced, the magnetic metal body can be attracted to the one end of the yoke in a more intimate state.

The housing 5 having a thread groove 51g provided on the outer peripheral surface thereof can be attached by a screwing member such as a nut 30 screwed into the thread groove 51g.
Installation work is easy.

Further, since the Hall IC 3a has a polarity based on the direction of the magnetic flux, the output form of the electric signal changes by changing the forward / reverse of the mounting direction along the magnetic flux,
An electric signal can be output when the magnetic metal body is adsorbed, and an electric signal can be output when the magnetic metal body is no longer adsorbed.

The magneto-electric conversion element 3 having an auxiliary magnet 3b for generating a magnetic flux in the opposite direction to the magnetic flux of the permanent magnet 2 is mounted.
By changing the strength of the magnetic flux of the auxiliary magnet 3b, the strength of the magnetic flux passing through the magnetoelectric conversion element 3 can be changed, and the state of adsorption between the magnetic metal body and one edge of the yokes 1, 1 can be adjusted. Can be.

Next, a second embodiment of the present invention will be described below with reference to FIG. The members having substantially the same functions as those of the first embodiment are denoted by the same reference numerals, and only the parts different from those of the first embodiment will be described. In the first embodiment, a gap 51 is provided between the magnet-chatch arrangement portion 51b and the inner surface thereof.
In contrast to the magnet latch 10 having d, the present embodiment is configured to have the filling member 6 made of resin or the like.

In such a switch, as in the first embodiment, the mounting work is easy to perform.
The output form of the electric signal can be changed, and the adsorption state between the magnetic metal body and one end of the yoke 1, 1 can be adjusted. In addition to these effects, the magnet catch 10 disposed with the filling member 6 between the magnet catch disposed portion 51b and the yoke 1, 1 constituting the magnet catch 10 is sealed. As a result, when not only the circuit block 20 but also the magnet catch 10 is required to be waterproofed, it becomes waterproof and becomes less likely to rust.
The magnetic flux easily passes, and the attraction force between the magnetic metal body and the magnetic pole surfaces 1a at one end of the yokes 1,1 can be increased. In addition, a filling member
6 can be fixed at a predetermined position where the attraction force is maximized, so that the magnetic metal body and the magnetic pole surfaces 1b, 1b of the yokes 1, 1 are in close contact with each other. Since the state is improved, it can be attached to a place requiring a highly accurate close contact state.

In each of the first and second embodiments, the case 51 of the housing 5 is provided with a thread groove 51g. For example, when the housing 5 is attached to a mounting location by fitting or bonding, etc. In this case, the case 51 of the housing 5 can be more easily formed.

In both the first and second embodiments, the case 51 of the housing 5 is formed in a cylindrical shape. For example, when the screw groove 51g is not provided on the outer surface, the case 51 is formed in a cylindrical shape. Instead of being formed, it may be formed in a box shape or the like, in which case the degree of freedom in design can be increased.

In each of the first and second embodiments, the Hall IC 3a is used as the magnetoelectric conversion element 3. However, the same effect can be obtained even if a Hall element is used.

In each of the first and second embodiments, a Hall IC 3a having a polarity based on the direction of magnetic flux is used as the magnetoelectric conversion element 3, but an electric signal is generated when a magnetic metal body is attracted. If the output is to be performed or an electrical signal is output when the magnetic metal member is no longer adsorbed, a device having a polarity based on the magnetic flux direction may not be used.

[0032]

According to the first aspect of the present invention, the arrangement portion for the circuit block is separated from the arrangement portion for the magnet catch by the separating wall, and a waterproof state is provided between the arrangement portion for the magnet catch and the arrangement portion for the magnet catch. Therefore, even if it is installed in a place where there is a risk of splashing water, when it is not necessary to waterproof the magnet catch, in order to waterproof the circuit block, you do not have to take the time and effort to waterproof the magnet catch, Since only the circuit block needs to be waterproofed, installation work is not required.

According to the second aspect of the invention, in addition to the effect of the first aspect, the magnet catch is disposed with a gap between the magnet catch and the inner surface of the magnet catch disposing portion. Since the position of one end of the yoke constituting the magnet catch is variable, even if there is some error in the positional relationship with the magnetic metal body, the position of the one end of the yoke can be moved in the direction that reduces the error. By doing so, the magnetic metal body can be adsorbed to one end edge of the yoke in a close contact state.

According to a third aspect of the present invention, in addition to the effects of the first aspect, the magnet catch provided with the filling member between the magnet catch and the mounting portion for the magnet catch,
When the yoke making up the magnet catch is sealed, when not only the circuit block but also the magnet catch needs to be waterproofed, it becomes waterproof and hardly rusts, making it easier for magnetic flux to pass. The attraction force between the metal body and one edge of the yoke can be increased. Further, the magnet catch disposed with the filling member between the magnet catch disposition portion and the magnet catch disposition portion can be fixed at a predetermined position set to maximize the attraction force, and the magnetic metal member and the yoke can be fixed. The contact state with the one end edge is improved, so that it can be attached to a place where a highly accurate contact state is required.

According to a fourth aspect of the present invention, in addition to the effects of the first aspect of the present invention, the housing provided with the thread groove on the outer surface has a nut screwed into the thread groove. And the like, and can be easily attached.

According to a fifth aspect of the present invention, in addition to the effects of the first to fourth aspects, the Hall IC and the Hall element both have a polarity based on the magnetic flux direction. By changing the forward / reverse of the mounting direction along the way, the output form of the electric signal changes, and it is possible to output the electric signal when the magnetic metal body is attracted, and to output the electric signal when the magnetic metal body is no longer attracted. Can also be output.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state in which a first embodiment of the present invention is mounted on a mounting plate.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a top view of the same.

FIG. 4 is a top view of the case.

FIG. 5 is a sectional view taken along line XX of FIG. 4;

FIG. 6 is a partial bottom view of the case.

FIG. 7 is a cross-sectional view illustrating a state where the second embodiment of the present invention is mounted on a mounting plate.

FIG. 8 is an exploded perspective view of a conventional example.

FIG. 9 is a sectional view of the above.

[Explanation of symbols]

 1 Yoke 2 Permanent magnet 3 Magnetoelectric transducer 3a Hall IC 4 circuit 5 Housing 51a Isolation wall 51b Arrangement for magnet catch 51c Arrangement for circuit block 51g Screw groove 6 Filling member 10 Magnet catch 20 Circuit block

Claims (5)

[Claims] 1. A magnet catch comprising a permanent magnet and a yoke capable of adsorbing a magnetic metal body at one end so as to sandwich the permanent magnet, and another end of the paired yokes. A circuit block composed of a magneto-electric conversion element which is provided at a position where the magnetic flux can pass and outputs an electric signal in response to a change in the magnetic flux, and a circuit connected to the magneto-electric conversion element, a magnet catch and a circuit block are provided. A switch provided with a magnet catch disposition portion and a circuit block disposition portion, wherein the housing separates the magnet catch disposition portion and the circuit block disposition portion from each other. A switch characterized in that a separating wall is provided. 2. The switch according to claim 1, wherein the magnet catch is provided with a gap between the magnet catch and an inner surface of the magnet catch providing portion. 3. The magnet catch and the circuit block are provided with a filling member between the magnet catch disposition portion and the circuit block disposition portion, respectively. Item 7. The switch according to Item 1. 4. The housing according to claim 1, wherein the housing has a cylindrical shape, and a thread groove is provided on an outer peripheral surface thereof.
4. The switch according to any one of claims 1 to 3. 5. The switch according to claim 1, wherein said magnetoelectric conversion element comprises a Hall IC or a Hall element.