CN203312157U

CN203312157U - Proximity switch triggered by magnetic force

Info

Publication number: CN203312157U
Application number: CN2013200809125U
Authority: CN
Inventors: M·J·西蒙斯
Original assignee: General Equipment and Manufacturing Co Inc
Current assignee: General Equipment and Manufacturing Co Inc
Priority date: 2012-02-09
Filing date: 2013-02-05
Publication date: 2013-11-27
Anticipated expiration: 2023-02-05
Also published as: EP2812905B1; IN2014DN07366A; CN103247473B; WO2013119723A1; MX2014009549A; JP2015510245A; CA2862726A1; EP2812905A1; BR112014019606A8; AR089904A1; BR112014019606A2; KR20140128334A; CN103247473A; RU2014134277A

Abstract

Disclosed is a proximity switch triggered by a magnetic force. The proximity switch includes a cylindrical switch body and an offset part which is immovably fixed in the switch body. The proximity switch also includes a first normally closed contact terminal and a second normally closed contact terminal, and a first normally open contact terminal and a second normally open contact terminal. The proximity switch also includes a spherical contact magnet arranged in the switch body and the contact magnet is capable of moving between a first switch position and a second switch position relative to the offset part. At the first switch position, contact of the contact magnet and the first normally closed contact terminal and the second normally closed contact terminal is maintained through attraction of the offset part so that a circuit between the first normally closed contact terminal and the second normally closed contact terminal is formed. On a second switch position, attraction of movable targets excluding the switch body moves the contact magnet to contact the first normally open contact terminal and the second normally open contact terminal so that a circuit between the first normally open contact terminal and the second normally open contact terminal is formed.

Description

The approach switch that magnetic force triggers

Technical field

The disclosure relates generally to approach switch, more specifically, relates to the approach switch that a kind of small-sized magnetic force triggers.

Technical background

Magnetic contact switch, also referred to as limit switch, is generally used for the linear position sensing.Typically, the approach switch that magnetic force triggers comprises inductor, and it is applicable to the existence of the detection of a target, and does not need the physical contact target.Typically, this inductor can comprise the switching circuit mechanism be enclosed in Switch main body, and this switching circuit mechanism typically comprises a plurality of levers and by one or more springs, is biased to the contact of primary importance.While in generally including the preset range of target at inductor that is contained in the permanent magnet in housing, passing, by the magnetic flux trigger switch circuit mechanism that target magnet produces, close thus the circuit of normally opening.Normally open closing by processor of circuit and survey, signal is sent to operator or automatic operating system, with existing of the target of indication in the preset range of inductor.Be fixed to this target typical the shift component of system, valve rod for example, and this inductor typically is fixed on the retaining element of system.When arranging like this, when shift component changed position, inductor can detect.Yet, due to needs, surrounding the larger physical size of the inductor of switching circuit mechanism, typical inductor can not be used in and need in having the zone of limited free space, place in the application of inductor.In addition, to inductor, provide the demand of electric power also to limit the application that can use inductor.

Although the approach switch that less magnetic force triggers may be desirable, the ability that reduces the size of approach switch can be subject to the restriction of a plurality of factors.Especially, if also need higher load value except programmable logic controller (PLC) (" PLC ") the level load of about 5V, need corresponding large contact to adapt to larger load, these big contacts have limited switch and have subtracted undersized ability.In addition, as previously mentioned, in switch case, also arranged several assemblies, the size restrictions of the actuating device of relative complex the minimum dimension of switch.The actuating device of this complexity has also increased time and the cost of manufacturing approach switch.

The utility model content

According to an illustrative aspects of the present utility model, the approach switch that magnetic force triggers comprises Switch main body and immovably is fixed on the first magnet in described Switch main body.Also comprise the public arm with first end and second end, described the second end is arranged in described Switch main body.Described approach switch also comprises the elementary arm with first end and second end.Described the second end is arranged in described Switch main body, and described the second end comprises elementary contact.In addition, described approach switch comprises the secondary arm with first end and second end.Described the second end is arranged in described Switch main body, and described the second end also comprises secondary contact.Described approach switch also comprises the transverse arm be arranged in described Switch main body.Described transverse arm has first end and the second end, and described first end is coupled to described public arm, and described the second end comprises public contact.Described approach switch also comprises the second magnet be arranged in described Switch main body, and described the second magnet is movably with respect to described the first magnet.Described the second magnet is coupled to described transverse arm, makes the movement of described the second magnet cause the corresponding movement of described transverse arm between first position of the switch and second switch position.In described first position of the switch, the described public contact of described transverse arm and the described elementary contact of described elementary arm, complete the circuit between described public arm and described elementary arm thus.In described second switch position, the described public contact of described transverse arm and the secondary contact of described secondary arm, complete the circuit between described public arm and described secondary arm thus.

In another embodiment, described the first magnet and described the second magnet are selected between described the first magnet and described the second magnet, to form the first magnetic force, and described the first magnetic force maintains described first position of the switch by described transverse arm.In addition, target beyond described the second magnet and described Switch main body is selected between described the second magnet and described target, to form the second magnetic force, if described the second magnetic force is greater than described the first magnetic force, described the second magnetic force makes described transverse arm move to described second switch position from described first position of the switch.

In another embodiment, when the second magnetic force between described target and described the second magnet becomes while being less than the first magnetic force between described the first magnet and described the second magnet, described the first magnetic force makes described transverse arm move to described first position of the switch from described second switch position.

In yet another embodiment, the described first end of described transverse arm is couple to described second end of described public arm by pivot, described the second magnet makes described transverse arm from described first position of the switch, rotate to described second switch position or rotate to described first position of the switch from described second switch position relative to moving of described the first magnet.In addition, the actuator arm of lengthening can be couple to described public arm by described the second magnet.Described actuator arm also can be arranged in the hole be formed in described the first magnet.

In another embodiment, the described first end of each in described public arm, described elementary arm and described secondary arm is arranged on beyond described Switch main body.In addition, described Switch main body can be columniform, and can be comprised of high-temperature material.And described Switch main body can be comprised of plastics, and described Switch main body can seal.

According to another illustrative aspects of the present utility model, the method for the approach switch detection of a target that use magnetic force triggers comprises to be provided Switch main body and the second end of public arm is arranged in described Switch main body.In addition, the elementary contact of elementary arm is arranged in described Switch main body, and the secondary contact of secondary arm is arranged in described Switch main body.Described method also comprises that the transverse arm that will have public contact is couple to movably described public arm and the second magnet is couple to described public arm.Contiguous described the second magnet arrangement of the first fixing magnet is in described Switch main body, and the power of described first magnet of the described public contact of described transverse arm by acting on described the second magnet is biased to and elementary contact.Described method also comprises target is arranged on the primary importance beyond described Switch main body, make the magnetic force between described target and described the second magnet be greater than the magnetic force between described the first magnet and described the second magnet, mobile described transverse arm, make described public contact break away from described elementary contact and engage described secondary contact thus.

In another embodiment, described method also comprises described target is arranged on the second place beyond described Switch main body, make the magnetic force between described target and described the second magnet be less than the magnetic force between described the first magnet and described the second magnet, mobile described transverse arm, make described public contact break away from described secondary contact and engage described elementary contact thus.

In another embodiment, described transverse arm is couple to described second end of described public arm by pivot, makes described transverse arm rotation, so that described public contact breaks away from described elementary contact and make described public contact engage described secondary contact.

In yet another embodiment, when described public contact engages described elementary contact, between described public arm and described elementary arm, form closed circuit; When described public contact engages described secondary contact, between described public arm and described secondary arm, form closed circuit.

In another embodiment, described method also comprises each the first end in described public arm, described elementary arm and described secondary arm is arranged on beyond described Switch main body.In addition, described method also comprises the described Switch main body of sealing.

According to another illustrative aspects of the present utility model.The approach switch that magnetic force triggers comprises along the Switch main body of body longitudinal axis extension and is immovably fixed to the bias component in described Switch main body.The approach switch that described magnetic force triggers also comprises the first normally closed contact, the second normally closed contact with engaging arms with engaging arms, have first of engaging arms normally opens contact and has second of engaging arms and normally open contact.The approach switch that described magnetic force triggers also comprises the contact magnet be arranged in described Switch main body, and described contact magnet is movably with respect to described bias component, makes described contact magnet move between first position of the switch and second switch position.In described first position of the switch, the part of the part of the engaging arms of described the first normally closed contact of described contact magnet contact and the engaging arms of described the second normally closed contact, complete the circuit between described the first normally closed contact and described the second normally closed contact thus.In described second switch position, described contact magnet contact described first part and described second of normally opening the engaging arms of contact is normally opened the part of the engaging arms of contact, completes thus described first and normally opens contact and the described second circuit of normally opening between contact.

Favourable, described contact magnet is spherical.

Favourable, described bias component and described contact magnet are selected between described bias component and described contact magnet, to form the first magnetic force, described the first magnetic force maintains described first position of the switch by described contact magnet, and the target beyond wherein said contact magnet and described Switch main body is selected between described contact magnet and described target, to form the second magnetic force, if described the second magnetic force is greater than described the first magnetic force, described the second magnetic force makes described contact magnet move to described second switch position from described first position of the switch.

Favourable, when described the second magnetic force between described target and described contact magnet becomes while being less than described the first magnetic force between described bias component and described contact magnet, described the first magnetic force makes described contact magnet move to described first position of the switch from described second switch position.

Favourable, described contact magnet is arranged in columniform the second chamber be formed in described Switch main body, and the cylindrical surface that wherein limits at least in part described the second chamber is applicable to limit or stops described contact magnet along perpendicular to the direction of described body longitudinal axis, moving.

Favourable, described contact magnet is shifted between described first position of the switch and described second switch position along described body longitudinal axis.

Favourable, described the first normally closed contact, described the second normally closed contact, described first are normally opened each the described engaging arms that contact and described second normally opens in contact and are had the elongate form with longitudinal axis.

Favourable, described the first normally closed contact, described the second normally closed contact, described first open normally that contact and described second normally opens in contact each have the adjutage of lengthening, the end of described adjutage along the direction that is parallel to described body longitudinal axis from described engaging arms extends.

Favourable, the described longitudinal axis of the described engaging arms of each in described the first normally closed contact and described the second normally closed contact extends along the second reference planes perpendicular to described body longitudinal axis.

Favourable, described first normally opens each the described longitudinal axis of described engaging arms that contact and described second normally opens in contact extends along the first reference planes parallel and that deviate from described the second reference planes.

Favourable, the first end setting of the contiguous described Switch main body of described bias component, and the second end setting of the contiguous described Switch main body of described the first reference planes.

Favourable, it is cylindrical that described the first normally closed contact, described the second normally closed contact, described first are normally opened each the described engaging arms that contact and described second normally opens in contact.

Favourable, described contact magnet is gold-plated neodymium magnetic spheres.

Favourable, described Switch main body comprises the first half bodies and the second half bodies, and wherein said the first half bodies and described the second half bodies are cylindrical in conjunction with forming.

Favourable, described Switch main body is arranged in the cylindrical body sleeve.

Favourable, described the first half bodies, described the second half bodies and described body sleeve are comprised of plastics.

According to another illustrative aspects of the present utility model, the method of the approach switch detection of a target that use magnetic force triggers comprises to be provided Switch main body and a pair of normally closed contact is arranged in described Switch main body, and a pair of contact of normally opening is arranged in described Switch main body.Described method also comprises fixing bias component is arranged in described Switch main body, to contact the contiguous described bias component of magnet and arrange movably, and the power of the described bias component by acting on described contact magnet by described contact magnet bias to described a pair of normally closed contact, engaging.Described method also comprises target is arranged in to the primary importance beyond described Switch main body, make the magnetic force between described target and described contact magnet be greater than the magnetic force between described bias component and described contact magnet, move thus described contact magnet, so that described contact magnet breaks away from described a pair of normally closed contact and engages the described a pair of contact of normally opening.

The accompanying drawing explanation

Figure 1A is the top half sectional view of an embodiment of the approach switch that triggers of magnetic force;

Figure 1B is the end view of the embodiment of Figure 1A;

Fig. 1 C is the rearview of the embodiment of Figure 1A;

Fig. 2 is the decomposition diagram of an embodiment of the approach switch that triggers of magnetic force;

Fig. 3 is the perspective view of an embodiment of the approach switch that triggers of magnetic force;

Fig. 4 is the top view of the first half bodies of an embodiment of the approach switch that triggers of magnetic force;

Fig. 5 A is the perspective view of public arm of an embodiment of the approach switch that triggers of magnetic force;

Fig. 5 B is the perspective view of transverse arm of an embodiment of the approach switch that triggers of magnetic force;

Fig. 6 A is an embodiment half sectional view that is in the approach switch that the magnetic force of first position of the switch triggers;

Fig. 6 B is the half sectional view that is in an embodiment of the approach switch that the magnetic force of second switch position triggers;

Fig. 7 A is the decomposition diagram of an embodiment of the approach switch that triggers of magnetic force;

Fig. 7 B is the perspective view of the embodiment of Fig. 7 A;

Fig. 8 A is the end view of the embodiment of Fig. 7 A;

Fig. 8 B is the rearview of the embodiment of Fig. 7 A;

Fig. 9 A is 9A along the line, and the cutaway view of the embodiment of Fig. 8 A that 9B-9A, 9B draw shows the approach switch that the magnetic force that is in first position of the switch triggers;

Fig. 9 B is 9A along the line, and the cutaway view of the embodiment of Fig. 8 A that 9B-9A, 9B draw shows the approach switch that the magnetic force that is in the second switch position triggers; And

Figure 10 shows the top view of the first half bodies of Switch main body of the embodiment of Fig. 7 A.

Specific embodiment

As shown in Figure 1A, the approach switch 10 of magnetic force triggering comprises Switch main body 12 and is immovably fixed to the first magnet 14 in Switch main body 12.Approach switch 10 also comprises the public arm 16 with first end 18 and second end 20, and the second end 20 of public arm 16 is arranged in Switch main body 12.Approach switch 10 also comprises the elementary arm 22 with first end 24 and second end 26.The second end 26 is arranged in Switch main body 12, and the second end 26 comprises elementary contact 28.In addition, approach switch comprises the secondary arm 30 with first end 32 and second end 34.The second end 34 is arranged in Switch main body 12, and the second end 34 comprises secondary contact 36.Transverse arm 38 is arranged in Switch main body 12, and transverse arm 38 has first end 40 and the second end 42.First end 40 is couple to public arm 16, the second ends 42 and comprises public contact 44.The second magnet 46 is arranged in Switch main body 12, and the second magnet 46 is removable with respect to the first magnet 14.Especially, the second magnet 46 is couple to transverse arm 38, makes the movement of the second magnet 46 cause the corresponding movement of transverse arm 38 between first position of the switch and second switch position.As shown in Figure 6A, in first position of the switch, the elementary contact 28 of the elementary arm 22 of public contact 44 contact of transverse arm 38, complete the circuit between public arm 16 and elementary arm 22 thus.As shown in Figure 6B, in the second switch position, the secondary contact 36 of the secondary arm 30 of public contact 44 contact of transverse arm 38, complete the circuit between public arm 16 and secondary arm 30 thus.

Figure 1A shows the transverse sectional view of the Switch main body 12 of the approach switch 10 that magnetic force triggers.Switch main body 12 is preferably the substantial cylindrical with circular cross section.Yet Switch main body 12 can have shape of cross section arbitrarily, for example polygon or ellipse.Switch main body 12 can comprise the first half body 12a and the second half body 12b.Because the second half body 12b can be identical with the first half body 12a, so only show the first half body 12a.Each in the first half body 12a and the second half body 12b can be formed by plastics, and can use such as common process such as injection mo(u)ldings and make.These plastics can be high-temperature materials, and it allows Switch main body 12 to be exposed in the environment that may damage conventional plastic material.As Figure 1B, 1C and shown in Figure 3, use any means in several methods well known in the prior art, for example use ultrasonic bonding or use adhesive, the first half body 12a and the second half body 12b can be combined into single switch body 12.In addition, Switch main body 12 can be sealed, runs into water or dust granules to prevent approach switch.Yet Switch main body 12 can be made by any suitable material, and can manufacture by any method known in the art.

As shown in Figure 1A and 4, the corresponding mating surface (not shown) that the mating surface 51 that the half round post of Switch main body 12 the first half body 12a can have general planar, this mating surface 51 are suitable for engaging the second half body 12b forms Switch main body 12.The first half body 12a also can comprise the first end 52 of opening, the first end 52 of this opening comprises semi-cylindrical the second magnet chamber 54, the second magnet chamber 54 can extend internally along the longitudinal axis 56 of body 12, and longitudinal axis 56 extends along the plane of mating surface 51.As shown in Figure 2, the size of the second magnet chamber 54 can be configured to accommodate detector magnet assembly 58, detector magnet assembly 58 comprises the second magnet 46 of plate-like and is couple to the magnet pedestal 60 of the second magnet 46, detector magnet assembly 58 axis 56 displacement slidably in the second magnet chamber 54 along the longitudinal.

Semi-cylindrical the first magnet chamber 62 also can be formed in the first half body 12a, is used for accommodating the first magnet 14 and is fixed in body, makes the longitudinal axis of plate-like the first magnet 14 substantially aim at the longitudinal axis 56 of the first half body 12a.Semi-cylindrical upper arm chamber 64 axis 56 along the longitudinal extends between the second magnet chamber 54 and the first magnet chamber 62, the size of upper arm chamber 64 is configured to be suitable for being housed in the actuator arm 66 of the lengthening of extending between transverse arm 38 and magnet pedestal 60.The contact chamber 68 of essentially rectangular can be formed in the first half body 12a, be used to the first end 116 of the second end 34, transverse arm 38 and the actuator arm 66 of the second end 26 of second end 20 of accommodating public arm 16, elementary arm 22, secondary arm 30.Semi-cylindrical underarm chamber 70 longitudinally axis 56 extends between the first magnet chamber 62 and contact chamber 68, the size of underarm chamber 70 is configured to be suitable for accommodating actuator arm 66.The public groove 72 of rectangle can extend to along the direction that is basically parallel to longitudinal axis 56 from contact chamber 68 the second end 74 of the first half body 12a, makes public groove 72 form public hole 75 on the rear surface 76 of the first half body 12a.The size of public groove 72 is configured to be suitable for accommodating public arm 16, makes the first end 18 of public arm 16 extend through the public hole 75 formed on rear surface 76.The elementary groove 78 of rectangle can extend to along the substantially parallel and direction that departs from public groove 72 from contact chamber 68 the second end 74 of the first half body 12a, makes elementary groove 78 form elementary hole 80 on the rear surface 76 of the first half body 12a.The size of elementary groove 78 is configured to be suitable for accommodating elementary arm 22, makes the first end 24 of elementary arm 22 extend through the elementary hole 80 on rear surface 76.In addition, the secondary slot 82 of rectangle can extend to along the direction that is basically parallel to and departs from public groove 72 and elementary groove 78 from contact chamber 68 the second end 74 of the first half body 12a, makes secondary slot 82 form secondary porosity 84 on the rear surface 76 of the first half body 12a.The size of secondary slot 82 is configured to be suitable for accommodating secondary arm 32, makes the first end 32 of secondary arm 30 extend through 76Shang De secondary porosity, rear surface 84.

As mentioned above and as Figure 1A and shown in Figure 2, the approach switch 10 of magnetic force triggering also comprises the detector magnet assembly 58 in the second magnet chamber 54 of the first half body 12a that are slidably disposed on Switch main body 12 and the second half body 12b.Detector magnet assembly 58 can comprise the second magnet 46, and also referred to as the detector magnet, it can be columniform.Preferably, the second magnet 46 has disc-shape.The second magnet 46 can be the suitable magnet of permanent magnet or any other type.Detector magnet assembly 58 also can comprise magnet pedestal 60, the circumferential side wall 88 that magnet pedestal 60 has smooth bottom 86 and extends away from bottom 86.The size of bottom 86 and sidewall 88 is configured to be suitable for accommodating the second magnet 46, makes the top of the flat surfaces adjacent sidewall 88 of the second magnet 46, and the outer radius of the second magnet 46 is slightly less than the inside radius of sidewall 88.Magnet pedestal 60 can be by such as metals such as stainless steels, making, and the second magnet 46 can be fixed to magnet pedestal 60 by magnetic force.Replacedly, magnet pedestal 60 can be made by the nonmagnetic body material, and the second magnet 46 can mechanically or adhesively be fixed to magnet pedestal 60.

Still referring to Figure 1A and Fig. 2, the approach switch 10 that magnetic force triggers also comprises the first magnet 14, also referred to as lift magnet.The first magnet 14 can be columniform, and can have disc-shape.The first magnet 14 also can have the hole 90 formed along the central longitudinal axis of the first magnet 14, and the size of hole 90 is suitable for holding actuator arm 66.The first magnet 14 can be accommodated in the first magnet chamber 62 of switch magnet 12, makes when the first half body l2a and the second half body 12a are combined together to form Switch main body 12, and the first magnet 14 can not be shifted.The first magnet 14 can be made by the material identical with the second magnet 46, but the radius of the first magnet 14 and radius and the thickness that thickness can be less than respectively the second magnet 46.The first magnet 14 can be arranged in the first magnet chamber 62, makes the second magnet 46 be attracted towards the first magnet 14.That is, if the arctic of the second magnet 46 faces toward the second end 74 of Switch main body 12, the South Pole of the first magnet 14 arranges facing to the arctic of the second magnet 46.On the contrary, if the South Pole of the second magnet 46 faces toward the second end 74 of Switch main body 12, the arctic of the first magnet 14 arranges facing to the South Pole of the second magnet 46.

Referring to Figure 1A, 2 and Fig. 5 A, the approach switch 10 that magnetic force triggers also comprises public arm 16, and public arm 16 is total assemblies of the circuit that formed by first position of the switch and the circuit that formed by the second switch position.Public arm 16 can be the fillet plate formed by conducting metals such as copper or copper alloy, and public arm 16 can form by Sheet Metal Forming Technology.As mentioned above, the second end 20 of public arm 16 is arranged in contact chamber 68, makes public arm 16 extend through the public groove 72 formed in Switch main body 12, and first end 18 passes public hole 75 and reaches Switch main body 12 position in addition.Public arm 16 can be arranged in public groove 72, makes the longitudinal axis of public arm 16 be parallel to the longitudinal axis 56 of Switch main body 12, and in a lateral direction, and public arm 16 is perpendicular to the plane of the mating surface 51 that passes the first half body 12a.As shown in Figure 4, the rear surface 91 of public arm 16 can contact the first wall 92, the first wall public arms 16 of 92 perpendicular alignmnet of public groove 72 and perpendicular to the plane of mating surface 51.The part that public arm 16 is arranged in public groove 72 can be crooked, and the top surface of bend 94 can contact the second wall 96, the second walls 96 that form public groove 72 and depart from and be parallel to the first wall 92.Because the lateral separation between the rear surface 91 of the top surface of bend 94 and public arm 16 is greater than the first wall 92 of public groove and the distance between the second wall 96, form public arm 16 is fixed on to the interference fit in public groove 72.When the first half body 12a and the second half body 12b are assembled into Switch main body 12, the basal surface 98 of public arm 16 can contact the 3rd wall 100 of the public groove 72 that forms the first half body 12a, the 3rd wall 100 is perpendicular to the first wall 92 and the second wall 96, and the top surface 102 of public arm 16 can contact the wall (not shown) of the corresponding public groove 72 of the second half body 12b.Due to the 3rd wall 100 of public groove 72, than the more approaching plane formed by mating surface 51 of the basal surface of contact chamber 68 98, there is gap between the basal surface 101 of the contact chamber 68 of the basal surface 101 of public arm 16 and the first half body 12a.Similarly, between the top surface (not shown) of the contact chamber 68 of the top surface 102 of public arm 16 and the second half body 12b, also there is gap.Public arm 16 also can comprise transverse groove 104, and the width that contiguous the second end 20 of transverse groove 104 crosses public arm 16 extends.

Referring to Figure 1A and Fig. 2, the approach switch 10 that magnetic force triggers also comprises elementary arm 22.Elementary arm 22 can be made by the material identical with public arm 16, and elementary arm 22 can engage elementary groove 78 by with public arm 16, engaging the mode that public groove 72 is identical.Therefore, the bend 106 of elementary arm 22 provides interference fit in elementary groove 78, so that elementary arm 22 is remained in elementary groove 78.In addition, the first end 24 of elementary arm 22 extends from the elementary hole 80 on the rear surface 76 that is formed on Switch main body 12, makes when perpendicular to mating surface 51, observing, and the first end 24 of elementary arm 22 is parallel to the first end 18 of public arm 16.The second end 26 of elementary arm 22 is coupled to elementary contact 28.Elementary contact 28 can be made by conducting metals such as copper or copper alloy, and elementary contact 28 can be by such as welding or machinery is fixing etc. that any mode known in the art is fixed to elementary arm 22.Replacedly, elementary contact 28 can form with the second end 26 of elementary arm 22.The first chamber wall 108 that elementary contact 28 neighbouring parts limit contact chamber 68 arranges.

Referring to Figure 1A and Fig. 2, the approach switch 10 that magnetic force triggers also comprises secondary arm 30 again.Secondary arm 30 can be made by the material identical with public arm 16, and secondary arm 30 can engage secondary slot 82 by with public arm 16, engaging the mode that public groove 72 is identical.Yet, secondary arm 30 can with elementary groove 78 in 22 one-tenth " mirror image " relations of elementary arm be arranged in secondary slot 82.More specifically, the top surface of the bend 110 of secondary arm 30 can face toward the top surface of the bend 106 of elementary arm 22.So arrange, the first end 32 of secondary arm 30 extends from the 76Shang De secondary porosity, rear surface 84 that is formed on Switch main body 12, make when perpendicular to mating surface 51, observing, the first end 32 of secondary arm 30 is parallel to the first end 24 of elementary arm 22 and the first end 18 of public arm 16.The second end 34 of secondary arm 30 is coupled to secondary contact 36.Similar with elementary contact 28, secondary contact 36 can be made by conducting metals such as copper or copper alloy, and secondary contact 36 can be by such as welding or machinery is fixing etc. that any mode known in the art is fixed to secondary arm 30.Replacedly, secondary contact 36 can form with the second end 34 of secondary arm 30.The second chamber wall 112 that secondary contact 36 can be close to contact chamber 68 arranges, and the second chamber wall 112 departs from and be parallel to the first chamber wall 108.

Referring to Figure 1A, 2 and Fig. 5 B, the approach switch 10 that magnetic force triggers also comprises transverse arm 38.Transverse arm 38 can be formed by the fillet plate of conducting metals such as copper or copper alloy, and public arm 16 can be formed by Sheet Metal Forming Technology and bending process subsequently.The second end 42 of transverse arm 38 can comprise public contact 44.Public contact 44 can be formed by conducting metals such as copper or copper alloy, and public contact 44 can be by such as welding or machinery is fixing etc. that any mode known in the art is fixed to transverse arm 38.Replacedly, public contact 44 can form with the second end 42 of transverse arm 38.The first end 40 of transverse arm 38 can comprise end-rings 114, and the part of end-rings 114 can be arranged in the transverse groove 104 of public arm 16, makes transverse arm 38 around the second end 20 rotations of public arm 16, to maintain simultaneously with public arm 16 and to contact.Transverse arm 38 can be admittedly rotates between first position of the switch and second switch position around the second end 20 of public arm 16.As shown in Figure 6A, in first position of the switch, the elementary contact 28 of the elementary arm 22 of public contact 44 contact of transverse arm 38, complete the circuit between public arm 16 and elementary arm 22 thus.As shown in Figure 6B, in the second switch position, the secondary contact 36 of the secondary arm 30 of public contact 44 contact of transverse arm 38, complete the circuit between public arm 16 and secondary arm 30 thus.

Referring to Figure 1A, 2 and Fig. 5 B, the approach switch 10 that magnetic force triggers also comprises actuator arm 66 again.Actuator arm 66 can be the cylinder lengthened, and it has first end 116 and second end 118 relative with first end 116.Replace cylinder, actuator arm 66 can have any suitable shape of cross section or the combination of these shapes, such as square, ellipse or polygon etc.Actuator 66 can be formed by plastic material or any other suitable material.Actuator arm 66 is slidably disposed in the upper arm chamber 64 and underarm chamber 70 of Switch main body 12, and each of upper arm chamber 64 and underarm chamber 70 can have the interior diameter of the overall diameter that is slightly larger than actuator arm 66.When the first magnet 14 is arranged in the first magnet chamber 62, the extensible hole 90 passed on the first magnet 14 of actuator arm 66.The first end 116 of actuator arm 66 can comprise groove 120, and groove 120 can be accommodated the edge part 122 that limits the hole on transverse arm 38, so that actuator arm 66 is fixed to transverse arm 38, as shown in Figure 5 B.Yet first end 116 can be by being couple to transverse arm 38 such as any modes known in the art such as machinery are fixing.The mode that the second end 118 of actuator arm 66 can be couple to by being similar to first end 116 transverse arm 38 is coupled to the magnet pedestal 60 of detector magnet assembly 58.

In operation, the first magnet 14 provides the magnetic force that attracts the second magnet 46.This attraction power is towards the first magnet 14 mobile detector magnet assemblies 58, thus towards the second end 74 movement actuator arms 66 of Switch main body 12.The movement of actuator arm 66 makes second end 20 rotations of transverse arm 38 around public arm 16, thus the elementary contact 28 of public contact 44 contact.As shown in Figure 6A, on first position of the switch, completing circuit between elementary arm 22 and public arm 16.Therefore, the closed circuit produced by first position of the switch can be detected by the processor of the first end 24 of the first end 18 that is operably connected to public arm 16 and elementary arm 22.

Yet during position in the magnetic target that can comprise permanent magnet or ferrous metal is moved to the preset range that is in approach switch 10, the magnetic force between target 124 and the second magnet 46 is greater than the magnetic force between the second magnet 46 and the first magnet 14.Larger power moves detector magnet assembly 58 towards target 124 and away from the first magnet 14, thus the mobile actuator arm 66 that is rigidly coupled to the magnet pedestal 60 of detector magnet assembly 58.When actuator arm 66 moved, transverse arm 38, around the second end 20 rotations of public arm 16, left elementary contact 28 and contacts secondary contact 36 with mobile public contact 44.As shown in Figure 6B, on the second switch position, circuit completes between secondary arm 30 and public arm 16.Therefore, the processor that the closed circuit produced by the second switch position can be operably connected to the first end 32 of the first end 18 of public arm 16 and secondary arm 30 detects.When target no longer was in the preset range of approach switch 10, the magnetic force between the first magnet 14 and the second magnet 46 became and is greater than the magnetic force between the second magnet 46 and target 124, and approach switch 10 moves to primary importance in above-described mode.

One of skill in the art will recognize that the magnetic force between target 124 and the second magnet 46 depends on several factors, for example the distance between the relative size of target 124 and the second magnet 46 and target 124 and the second magnet 46, can adjust these variablees the interaction of the best between approach switch 10 and target 124 is provided.By similar manner, also can adjust the magnetic force between the second magnet 46 and the first magnet 14.

Those of ordinary skills also will recognize the disclosed embodiment of the approach switch 10 that magnetic force triggers allow to have global design than P cock body 12, it also allows approach switch 10 that magnetic force triggers for such as electrical junction box etc., having the application that the confined space requires.Those skilled in the art also understand and are different from typical approach switch, and the disclosed embodiment of the approach switch 10 that magnetic force triggers does not need external power to move, and has simplified thus the useful life of installing and having extended approach switch 10.

The disclosed embodiment of approach switch 10 can be carried out difference and be changed, and these variations still fall in the scope of claims.For example, replace described one pole/mono-structure of throwing, bipolar/double-throw structure is also considerable.In addition, LEDS can be included in housing, is to be in first position of the switch or second switch position to indicate visibly approach switch.

Fig. 7 shows the interchangeable embodiment of the approach switch 200 of magnetic force triggering, and it has along the Switch main body 202 of body longitudinal axis 204 extensions and is immovably fixed to the bias component 206 in Switch main body 202.The approach switch 200 that magnetic force triggers also comprises the first normally closed contact 208, the second normally closed contact 212 with engaging arms 214 with engaging arms 210, have first of engaging arms 218 normally opens contact 216 and has second of engaging arms 222 and normally open contact 220.The approach switch 200 that magnetic force triggers also comprises the contact magnet 224 be arranged in Switch main body 202, contact magnet 224 is movably with respect to bias component 206, makes contact magnet 224 move between first position of the switch 226 (as shown in Fig. 9 A) and second switch position 228 (as shown in Fig. 9 B).In first position of the switch 226 shown in Fig. 9 A, the part of the part of the engaging arms 210 of contact magnet 224 contact the first normally closed contacts 208 and the engaging arms 214 of the second normally closed contact 212, complete the circuit between the first normally closed contact 208 and the second normally closed contact 212 thus.In the second switch position as shown in Fig. 9 B, contact magnet 224 contact first parts and second of normally opening the engaging arms 218 of contact 216 are normally opened the part of the engaging arms 222 of contact 220, complete thus first and normally open contact 216 and second and normally open the circuit between contact 220.

Referring to Fig. 7 A and 7B, the approach switch 200 that magnetic force triggers comprises Switch main body 202, and it extends along body longitudinal axis 204, make Switch main body 202 have first end 232 with vertical relative the second end 234 of first end 232.Switch main body 202 is preferably the substantial cylindrical with circular cross section.Yet Switch main body 202 can have random cross-sectional shape, such as polygon or ellipse etc.Switch main body 202 can comprise single, global facility, maybe can comprise two or more components, and it couples and forms Switch main body 202.For example, Switch main body 202 can comprise the first half body 230a and the second half body 230b, and it is in conjunction with forming Switch main body 202, the first half body 230a and the second half body 230b can be identical or basic identical.Each in the first half body 230a and the second half body 230b can be formed by non-conducting material, such as plastics, pottery, epoxy resin or rubber etc., and can use such as common process manufactures such as injection mo(u)ldings.Plastics can be high-temperature materials, and it allows Switch main body 202 to be exposed in the environment that may damage conventional plastic material.Use any means in several method well known in the prior art, for example use ultrasonic bonding or use adhesive, the first half body 230a and the second half body 230b can be in conjunction with forming single switch body 202.Yet Switch main body 202 can be made by any suitable material, and can use any method manufacture known in the art.

As Fig. 7 A, 9A, 9B and shown in Figure 10, the first half body 230a of Switch main body 202 axis 204 along the longitudinal extend to the second end 234 of Switch main body from the first end 232 of Switch main body 202.The first half body 230a can have the mating surface 236a of substantially flat, and the corresponding mating surface (not shown) that this mating surface 236a is suitable for engaging the second half body 230b forms Switch main body 202.The first half body 230a also can comprise the first chamber 238a, and the first chamber 238a extends along body longitudinal axis 204, and body longitudinal axis 204 extends along the plane of mating surface 236a.But the first end 232 of the first chamber 238a proximity switches body 202 arranges, and the shape and size of the first chamber 238a are suitable for accommodating below bias component 206 in greater detail.For example, the first chamber 238 can be half-cylindrical, and can have the longitudinal axis coaxial with body longitudinal axis 204.More particularly, the first chamber 238a can comprise the first smooth wall 278a and the second smooth wall 280a, the first wall 278a is arranged on the first longitudinal component of the first chamber 238a, and the first end 232 of the second wall 280a proximity switches body 202 is arranged on the second longitudinal component of the first chamber 238a.The first wall 278a and the second wall 280a can be respectively perpendicular to body longitudinal axis 204.Semi-cylindrical circumferential cavity chamber surface 282a can extend between the first wall 278a and the second wall 280a, the longitudinal axis of circumferential cavity chamber surface 282a can with body longitudinal axis 204 coaxial alignments.So arrange, when the first half body 230a and the second half body 230b couple while forming Switch main body 202, the first chamber 238b of the first chamber 238a of the first half body 230a and the second half body 230b is in conjunction with forming columniform the first chamber 238, this first chamber 238 is about body longitudinal axis 204 symmetries, and has the longitudinal axis of aiming at body longitudinal axis 204.

Still referring to Fig. 7 A, 9A, 9B and Figure 10, cylindrical the first chamber 238 formed by the first chamber 238b of the first chamber 238a of the first half body 230a and the second half body 230b is suitable for accommodating the bias component 206 (also referred to as " biasing disk ") of plate-like, makes bias component 206 immovably fixing (or substantially immovably fixing) in cylindrical first chamber 238 of Switch main body 202.More specifically, the longitudinal length of cylindrical the first chamber 238 (namely, fore-and-aft distance between the first wall 278a, 278b and the second wall 280a, 280b) and diameter (that is, each radius of semi-cylindrical circumferential cavity chamber surface 282a, 282b and) be greater than respectively longitudinal length and the diameter of (for example large 3% to 10%) cylindrical bias component 206.Bias component 206 can have longitudinal axis, in the time of in being arranged on the first chamber 238, and this longitudinal axis and body longitudinal axis 204 coaxial alignments.Bias component 206 can for example, be made by the combination of iron material (, steel), magnetic material or any other material or these materials, and these materials cause or produce for example, between material and magnet (, contact magnet 234) magnetic attraction.

As Fig. 7 A and shown in Figure 10, the first half body 230a of Switch main body 202 can comprise the second chamber 240a be formed in Switch main body 202.The second chamber 240a can be arranged between the first chamber 238a and the second end 234 of Switch main body 202, but makes the second end 234 of the end proximity switches body 202 of the second chamber 240a.The shape and size of the second chamber 240a are suitable for accommodating and will movably contact in greater detail below magnet 224.For example, the second chamber 240a can be semi-cylindrical, and can have the longitudinal axis coaxial with body longitudinal axis 204.More specifically, the second chamber 240a can comprise the first smooth wall 242a and the second smooth wall 244a, this first wall 242a is arranged on first of the second chamber 240a and vertically holds, and the second end 234 of the second wall 244a proximity switches body 202 is arranged on second of the second chamber 240a and vertically holds.The first wall 242a and the second wall 244a can be respectively perpendicular to body longitudinal axis 204.Semi-cylindrical circumferential cavity chamber surface 246a can extend between the first wall 242 and the second wall 244, and the longitudinal axis of circumferential cavity chamber surface 246a can be coaxial with body longitudinal axis 204.So arrange, when the first half body 230a and the second half body 230b assemblings form Switch main body 202, the circumferential cavity chamber surface 246b cooperation of the circumferential cavity chamber surface 246a of the first half body 230a and the second half body 230b forms the cylindrical surface (that is, having longitudinal axis coaxillay aligned with it) about symmetrically arranged the second chamber 240 of body longitudinal axis 204.The first wall 242a and the second wall 244a can be separated by any suitable distance, by following mode in greater detail, move longitudinally to second switch position 228 (as shown in Fig. 9 A and 9B) from first position of the switch 226 to allow contact magnet 224.The radius of circumferential cavity chamber surface 246a, 246b (namely, the diameter of the second chamber 240) can have arbitrary value, it allows contact magnet 224 by following mode in greater detail, to move longitudinally to second switch position 228 (as shown in Fig. 9 A and 9B) from first position of the switch 226.

Still referring to Fig. 7 A and Figure 10, the first half body 230a also can comprise respectively the first contact hole 248 and the second contact hole 250 that extends to the circumferential cavity chamber surface 246a of the first half body 230a from the outer surface 252a of the first half body 230a.The first contact hole 248 and the second contact hole 250 can or the second wall 244a place and the circumferential cavity chamber surface 246a of contiguous the second chamber 240a crossing.For example, the part of the part of the first contact hole 248 and the second contact hole 250 can contact (or directly contiguous) by circumferential cavity chamber surface 246a and the crossing edge formed of the second wall 244a.The first contact hole 248 and the second contact hole 250 be Axis Extension along the longitudinal, and each longitudinal axis can be parallel and can extend along the first reference surface 254 that is orthogonal to body longitudinal axis 204.When the mating surface 236a perpendicular to smooth observed, the first contact hole 248 and the second contact hole 250 can arrange symmetrically about body longitudinal axis 204 (that is, equidistant from body longitudinal axis 204).The first contact hole 248 and the second contact hole 250 can have any suitable size and dimension, are used for accommodating respectively the engaging arms 222 that the first engaging arms 218 and second of normally opening contact 216 is normally opened contact 220.For example, if engaging arms 218,222 has respectively circular cross sectional shape, the first contact hole 248 and the second contact hole 250 can have respectively slightly larger in diameter in the shape of cross section of the diameter of engaging arms 218,222.Replacedly, the diameter of the first contact hole 248 and the second contact hole 250 equals the diameter of (or being slightly less than) engaging arms 218,222 substantially, to allow interference fit, engaging arms 218,222 is fixed in the first contact hole 248 and the second contact hole 250.The first contact hole 248 and the second contact hole 250 can have one or more inner tabs, spine, fin or further feature, can be used to engage and keep the first engaging arms 218 and second of normally opening contact 216 normally to open the engaging arms 222 of contact 220.

Still referring to Fig. 7 A and Figure 10, the second half body 230b can comprise respectively the first contact hole 256 and the second contact hole 258 that extends to the circumferential cavity chamber surface 246b of the second half body 230b from the outer surface 252b of the second half body 230b.The first contact hole 256 and the second contact hole 258 can or the first wall 242b of the second chamber 240b of contiguous the second half body 230b crossing with circumferential cavity chamber surface 246b.For example, the part of the part of the first contact hole 256 and the second contact hole 258 can contact (or directly contiguous) by circumferential cavity chamber surface 246b and the crossing edge formed of the first wall 242b.The first contact hole 256 and the second contact hole 258 can be distinguished Axis Extension along the longitudinal, each longitudinal axis can be parallel and can extend along the second reference surface 260, and this second reference surface 260 is orthogonal to body longitudinal axis 204 and vertically departs from the first reference surface 254.When the smooth mating surface 236b perpendicular to the second half body 230b observed, the first contact hole 256 and the second contact hole 258 can arrange symmetrically about body longitudinal axis 204 (that is, equidistant from body longitudinal axis 204).In addition, when the smooth mating surface 236a perpendicular to the first half body 230a observes, the longitudinal axis of the first contact hole 248 of the first half body 230a can vertically be aimed at the longitudinal axis (that is, aiming at the axis of reference that is parallel to body longitudinal axis 204) of the first contact hole 256 of the second half body 230b.Similarly, when the smooth mating surface 236a perpendicular to the first half body 230a observes, the longitudinal axis of the second contact hole 250 of the first half body 230a can vertically be aimed at the longitudinal axis (that is, aiming at the axis of reference that is parallel to body longitudinal axis 204) of the second contact hole 258 of the second half body 230b.The first contact hole 256 and the second contact hole 258 can have any suitable size and dimension, are used for accommodating respectively the engaging arms 210 of the first normally closed contact 208 and the engaging arms 214 of the second normally closed contact 212.For example, if engaging arms 210,214 has respectively circular cross sectional shape, the first contact hole 256 and the second contact hole 258 can have respectively slightly larger in diameter in the circular cross sectional shape of the diameter of engaging arms 210,214.Replacedly, the diameter of the first contact hole 256 and the second contact hole 258 equals the diameter of (or being slightly less than) engaging arms 210,214 substantially, to allow interference fit, engaging arms 210,214 is fixed in the first contact hole 256 and the second contact hole 258.The first contact hole 256 and the second contact hole 258 can have one or more inner tabs, spine, fin or further feature, can be used to engage and keep the engaging arms 210 of the first normally closed contact 208 and the engaging arms 214 of the second normally closed contact 212.

As Fig. 7 A and shown in Figure 10, the first half body 230a also can comprise respectively the first contact hole 256 and coaxillay aligned the first auxiliary contact hole 264 of the second contact hole 258 and the second auxiliary contact hole 266 with the second half body 230b.Similarly, the second half body 230b also can comprise respectively the first contact hole 248 and coaxillay aligned the first auxiliary contact hole 268 of the second contact hole 250 and the second auxiliary contact hole 270 with the first half body 230a.

Referring to Fig. 7 A, the first half body 230a can comprise the one or more longitudinal fluting 262a that are formed on outer surface 252a.For example, the first half body 230a can comprise two groove 262a that extend along outer surface 252a, make each groove 262a be parallel to body longitudinal axis 204.The first groove in two groove 262a intersects with the first contact hole 248 and the first auxiliary contact hole 264, makes each in the first contact hole 248 and the first auxiliary contact hole 264 crossing with the outer surface 252a in the first groove 262a.The second groove in two groove 262a can intersect with the second contact hole 250 and the second auxiliary contact hole 266, makes each in the second contact hole 250 and the second auxiliary contact hole 266 crossing with the outer surface 252a in the second groove 262a.Each in the first groove and the second groove 262a can extend to from the first end 232 of Switch main body 202 position of the second end 234 of proximity switches body 202.Referring to Fig. 7 A, the second half body 230b can comprise the one or more longitudinal fluting 262b that are formed on outer surface 252b.For example, the second half body 230b can comprise two groove 262b that extend along outer surface 252b, make each groove 262b be parallel to body longitudinal axis 204.The first groove in two groove 262b intersects with the first contact hole 256 and the first auxiliary contact hole 268, makes each in the first contact hole 256 and the first auxiliary contact hole 268 crossing with the outer surface 252b in the first groove 262b.The second groove in two groove 262b can intersect with the second contact hole 258 and the second auxiliary contact hole 270, makes each in the second contact hole 258 and the second auxiliary contact hole 270 crossing with the outer surface 252b in the second groove 262b.Each in the first groove and the second groove 262b can extend to from the first end 232 of Switch main body 202 position of the second end 234 of proximity switches body 202.Each groove 262a, 262b can have identical shape of cross section, and mode is accommodated the first normally closed contact 208 in greater detail, the second normally closed contact 212, first is normally opened contact 216 and second and normally opened the part of in contact 220 by below inciting somebody to action for it.

As shown in Fig. 7 A, 7B, 8A, 8B, 9A and 9B, the approach switch 200 that magnetic force triggers can comprise the first normally closed contact 208 and the second normally closed contact 212.The first normally closed contact 208 can comprise engaging arms 210, and it is accommodated in the first contact hole 256 of the second half body 230b.Engaging arms 210 can have any suitable shape, for example, lengthening cylindrical, it has and the coaxillay aligned longitudinal axis of the longitudinal axis of the first contact hole 256.The first normally closed contact 208 also can comprise the adjutage 272 of lengthening, and its end from engaging arms 210 274 extends.Adjutage 272 can have any suitable shape, and what for example lengthen is cylindrical, and it has the longitudinal axis that the longitudinal axis phase quadrature with engaging arms 210 arranges, and makes the first normally closed contact 208 have L shaped.By engaging arms 210, be received in the first contact hole 256 of the second half body 230b, adjutage 272 vertically is received in the corresponding recesses 262b on the outer surface 252b that is formed on the second half body 230b, thereby the end 276 of adjutage 272 extends beyond the first end 232 of Switch main body 202.Arrange like this, be received in the first auxiliary contact hole 264 that engaging arms 210 in the first contact hole 256 of the second half body 230b also can be received into the first half body 230a at least partly, further engaging arms 210 is fixed in Switch main body 202.

The second normally closed contact 212 can comprise engaging arms 214, by the engaging arms 210 with the first normally closed contact 208, be received into respectively identical mode in the first auxiliary contact hole 264 of the first contact hole 256 of the second half body 230b and the first half body 230a, engaging arms 214 is received in the second auxiliary contact hole 266 of the second contact hole 258 of the second half body 230b and the first half body 230a.The adjutage 286 lengthened can extend from the end 288 of engaging arms 214, adjutage 286 can vertically be received in the corresponding recesses 262b on the outer surface 252b that is formed on the second half body 230b, makes the end 290 of adjutage 286 extend beyond the first end 232 of Switch main body 202.

Again referring to shown in Fig. 7 A, 7B, 8A, 8B, 9A and 9B, the approach switch 200 that magnetic force triggers can comprise that first normally opens contact 216 and 5 two and normally open contact 220.First normally opens contact 216 can comprise engaging arms 218, by the engaging arms 210 with the first normally closed contact 208, be received into respectively identical mode in the first auxiliary contact hole 264 of the first contact hole 256 of the second half body 230b and the first half body 230a, engaging arms 218 is received in the first auxiliary contact hole 268 of the first contact hole 248 of the first half body 230a and the second half body 230b.The adjutage 292 lengthened can extend from the end 294 of engaging arms 218, adjutage 292 can vertically be received in the corresponding recesses 262a on the outer surface 252a that is formed on the first half body 230a, makes the end 296 of adjutage 292 extend beyond the first end 232 of Switch main body 202.

Second normally opens contact 220 can comprise engaging arms 222, by the engaging arms 210 with the first normally closed contact 208, be received into respectively identical mode in the first auxiliary contact hole 264 of the first contact hole 256 of the second half body 230b and the first half body 230a, engaging arms 222 is received in the second auxiliary contact hole 270 of the second contact hole 250 of the first half body 230a and the second half body 230b.The adjutage 298 lengthened can extend from the end 300 of engaging arms 222, adjutage 298 can vertically be received in the corresponding recesses 262a on the outer surface 252a that is formed on the first half body 230a, makes the end 302 of adjutage 298 extend beyond the first end 232 of Switch main body 202.By described setting, adjutage 272,286,292,298 can be parallel to each other, and the end 284,290,296 of adjutage 272,286,292,298 and 302 can to leave in the vertical respectively the first end 232 that closes body 202 equidistant.The first and second normally closed contacts 208,212 and first and second normally open contact 216,220 can be respectively by being combined to form of any suitable non-magnetic conductive material or these materials, such as copper or silver etc.The first and second normally closed contacts 208,212 and first and second are normally opened contact 216,220 can also all or part of coating (for example, only be used for engaging on the part of contact magnet 224 apply) such as any suitable coating such as gold plates.

Referring to shown in Fig. 7 A, 7B, 8A, 8B, 9A and 9B, the approach switch 200 that magnetic force triggers can comprise body sleeve 304 again, and it gets around pass body 202 admittedly from first end 232 and the second end 234.The shape of cross section of body sleeve 304 is corresponding to the shape of cross section of Switch main body 202.For example,, if for to have the cylindrical of circular cross section, body sleeve 304 can have cylindrical form interior surface 306 and outer surface 308 to Switch main body 202 (it can comprise the first half body 230a and the second half body 230b).Outer surface 308 can have any suitable shape, for example cylindrical, and can comprise one or more mounting characteristic (not shown).The diameter of inner surface 306 can be slightly larger than the overall diameter of the cylindrical outer surface (that is, outer surface 252a, 252b) of Switch main body 202, but and the longitudinal axis coaxial alignment body longitudinal axis 204 of inner surface 306 and outer surface 308.Between the cylindrical outer surface 252 of the inner surface 306 of body sleeve 304 and Switch main body 202, can there is little gap, be used for holding the adjutage 272,286,292 and 298 in groove 262a, the 262b be arranged on outer surface 252a, the 252b that is formed at Switch main body 202, on the ideal position that the contact between the inner surface 306 of body sleeve 304 and adjutage 272,286,292 and 298 can maintain the engaging arms 210,214,218 and 222 be associated with respect to Switch main body 202.Gap between the inner surface 306 of body sleeve 304 and the cylindrical outer surface 252 of Switch main body 202 can be filled with epoxy resin and/or any other suitable encapsulant, enters gap to stop water or dust.Body sleeve 304 can comprise that the second end 234 of proximity switches body 202 is arranged on the end wall 309 on vertical end of body sleeve 304, and end wall 309 can stop up vertical end of body sleeve 304.End wall 309 can be smooth, and can extend perpendicular to body longitudinal axis 204.Substitute and have end wall 309, vertical end of the body sleeve 304 of the second end 234 of proximity switches body 202 can open wide.Body sleeve 304 can be made by any suitable non-conductive and nonmagnetic substance, for example be used for forming the non-conductive plastic material that Switch main body 202 is identical (for example, plastics, pottery, epoxy resin or rubber etc.).

As shown in Fig. 7 A, 9A and 9B, the approach switch 200 that magnetic force triggers also can comprise the contact magnet 224 be arranged in Switch main body 202.More specifically, contact magnet 224 can be arranged in the second chamber 240 of Switch main body 202, and this second chamber 240 can be the cylindrical chamber that half round post the second chamber 240b by half round post the second chamber 240a of the first half body 230a and the second half body 230b forms.Contact magnet 224 can be spherical, and its diameter is slightly less than the diameter of (for example, being less than 3% or 15%) cylindrical the second chamber 240.Contact magnet 224 can be made or the coated with conductive material by electric conducting material.For example, contact magnet 224 can be gold-plated spherical neodymium magnet.Yet contact magnet 224 can have any shape or size, it allows contact magnet 224 to move longitudinally to second switch position 228 (as shown in Fig. 9 B) from first position of the switch 226 (as shown in Figure 9 A).

As above-mentioned assembling, by in the bias component 206 in the first chamber 238 of Switch main body 202 and the second chamber 240 that is arranged on Switch main body 202, contacting magnet 224, magnetic attraction (namely, the first magnetic force) act between bias component 226 and contact magnet 224, maintain on first position of the switch 226 (as shown in Figure 9 A) will contact magnet 224.In first position of the switch 226, the part of the part of the engaging arms 210 of the contact magnet 224 contact first normally closed contacts 208 of conduction and the engaging arms 214 of the second normally closed contact 212, complete the circuit between the first normally closed contact 208 and the second normally closed contact 212 thus.And, in first position of the switch 226, the contact magnet 224 of conduction does not contact any part that the first any part or second of normally opening the engaging arms 218 of contact 216 is normally opened the engaging arms 222 of contact 220, first, normally opens contact 216 and second thus and normally opens the circuit that contact 220 formation are opened.Therefore, the closed circuit produced by the first make position 226 can be by the part of the adjutage 272 that is operably connected to the first normally closed contact 208 (for example, end 284) and processor, controller or other detector of the part of the adjutage 286 of the second normally closed contact 212 (for example, end 290) detect.Similarly, by first position of the switch 226 produce open circuit can by be operably connected to first normally open contact 216 adjutage 292 a part (for example, end 296) and the second processor, controller or other detector of normally opening the part (for example, end 302) of the adjutage 298 of contact 220 detect.

Yet, as shown in Fig. 9 B, when magnetic target 310, it can be formed or be comprised permanent magnet or ferrous metal by permanent magnet or ferrous metal, while being moved to the position in the preset range of approach switch 200, magnetic force (for example, the second magnetic force) between target 310 and contact magnet 224 can be greater than the first magnetic force (that is, the magnetic attraction between contact magnet 224 and bias component 206).In preset range, the second larger magnetic force is used for contact magnet 224 is moved longitudinally to the second switch position 228 as shown in Fig. 9 B from first position of the switch 226 as shown in Figure 9 A.In second switch position 228, contact magnet 224 contact first parts and second of normally opening the engaging arms 218 of contact 216 of conduction are normally opened the part of the engaging arms 222 of contact 220, complete thus first and normally open contact 216 and second and normally open the circuit between contact 220.Therefore, the closed circuit produced by second switch position 228 can by be operably connected to first normally open contact 216 adjutage 292 a part (for example, end 296) and the second processor, controller or other detector of normally opening the part (for example, end 302) of the adjutage 298 of contact 220 detect.And, in second switch position 228, the contact magnet 224 of conduction does not contact any part of the engaging arms 214 of any part of engaging arms 210 of the first normally closed contact 208 or the second normally closed contact 212, between the first normally closed contact 208 and the second normally closed contact 212, forms thus the circuit of opening.Correspondingly, can be by the part of the adjutage 272 that is operably connected to the first normally closed contact 208 (for example by the circuit of opening that second switch position 228 produces, end 284) and processor, controller or other detector of the part of the adjutage 286 of the second normally closed contact 212 (for example, end 290) detect.

When target 310 no longer is in the preset range of approach switch 200, magnetic force between bias component 206 and contact magnet 224 (namely, the first magnetic force) become be greater than between contact magnet 204 and target 310 magnetic force (namely, the second magnetic force), and by mode described above, the first magnetic force will contact magnet 224 and from second switch position 228, move longitudinally to first position of the switch 226.

Bright as noted earlier, the circumferential cavity chamber surface 246b cooperation of the circumferential cavity chamber surface 246a of the first half body 230a and the second half body 230b forms or limits at least partly the cylindrical surface of the second chamber 240.The cylindrical surface of the second chamber 240 can have any suitable diameter, and it allows contact magnet 224 to move longitudinally to second switch position 228 from first position of the switch 226, and vice versa.More particularly, when contact magnet 224 was in first position of the switch 226, second switch position 228 or moves longitudinally to first position of the switch 226 (vice versa) from second switch position 228, the cylindrical surface of the second chamber 240 was applicable to restriction or stop contact magnet 224 along perpendicular to the direction of body longitudinal axis 204, moving.Preferably, the diameter of the cylindrical surface of the second chamber 240 can be slightly larger than the diameter of (for example, being greater than 5% or 15%) spherical contact magnet 224.

One of skill in the art will recognize that, magnetic force between target 310 and contact magnet 224 can be depending on several factors, for example the distance between the relative size of target 310 and contact magnet 224 and target 310 and contact magnet 224, can adjust the desirable preset range that these variablees are provided for application-specific.By similar manner, can adjust the magnetic force between contact magnet 224 and bias component 206.

Those of ordinary skills also will recognize, the disclosed embodiment of the approach switch 200 that magnetic force triggers allows than P cock 202, and it has the simple actuating device that comprises the single moving-member (that is, contact magnet 224) that acts on actuator and contact.This simplified design minimizes the number of assembling parts, and has reduced the number of assembly operation, has reduced thus manufacturing cost and built-up time.This simplified design also allows overall dimensions to reduce the diameter restriction of contact magnet 224 (only by), and this approach switch 200 that allows magnetic force to trigger is used in such as electrical junction box etc. to have in the application that the confined space requires.The approach switch 200 triggered due to magnetic force is intended for PLC level load and (for example, 5V) or lower switch, so the contact size is correspondingly little, allows thus the further size reduction of approach switch 200.Those of ordinary skills are also clear, and external power is optional, has simplified thus the installation of approach switch 200 and has extended useful life.

Although different embodiment described above, the disclosure is not limited to this.Within the scope of the appended claims, can change disclosed embodiment.For example, the single switch body 200 of approach switch 200 (for example can comprise two or more switching circuits, comprise respectively bias component 206, contact magnet 224 and a plurality of contact 208,212,216,220), each switching circuit can operate independently, in above-described mode, moves to second switch position 228 from first position of the switch 226 with the contact magnet 224 that allows each circuit.Two or more switching circuits property direction along the line are arranged in Switch main body 202, with the measure linear stroke.Replacedly, two or more switching circuits can grid form be arranged in Switch main body 202, arrange (that is, along on body longitudinal axis 204 and the direction perpendicular to body longitudinal axis 204, arranging) to allow the X-Y target.In other embodiments, approach switch 200 can be sealed, runs into water or dust granule to prevent approach switch 200, or allow approach switch 200 to be used on adventurous position.In addition, can comprise LEDS on the part of Switch main body 202 or body sleeve 204 or in a part, be used for indicating visibly approach switch 200 to be in first position of the switch 226 or second switch position 228.

Claims

1. the approach switch that magnetic force triggers, is characterized in that, comprising:

Switch main body, it extends along the body longitudinal axis;

Bias component, it is immovably fixed in described Switch main body;

The first normally closed contact, it has engaging arms;

The second normally closed contact, it has engaging arms;

First normally opens contact, and it has engaging arms;

Second normally opens contact, and it has engaging arms;

The contact magnet, it is arranged in described Switch main body, and described contact magnet is movably with respect to described bias component, makes described contact magnet move between first position of the switch and second switch position;

Wherein, in described first position of the switch, the part of the part of the described engaging arms of described the first normally closed contact of described contact magnet contact and the described engaging arms of described the second normally closed contact, complete thus the circuit between described the first normally closed contact and described the second normally closed contact, and

Wherein, in described second switch position, described contact magnet contact described first part and described second of normally opening the described engaging arms of contact is normally opened the part of the described engaging arms of contact, completes thus described first and normally opens contact and the described second circuit of normally opening between contact.

2. the approach switch of magnetic force triggering according to claim 1, is characterized in that, described contact magnet is spherical.

3. the approach switch that triggers of magnetic force according to claim 1, it is characterized in that, described bias component and described contact magnet are selected between described bias component and described contact magnet, to form the first magnetic force, described the first magnetic force maintains described first position of the switch by described contact magnet, and the target beyond wherein said contact magnet and described Switch main body is selected between described contact magnet and described target, to form the second magnetic force, if described the second magnetic force is greater than described the first magnetic force, described the second magnetic force makes described contact magnet move to described second switch position from described first position of the switch.

4. the approach switch that triggers of magnetic force according to claim 3, it is characterized in that, when described the second magnetic force between described target and described contact magnet becomes while being less than described the first magnetic force between described bias component and described contact magnet, described the first magnetic force makes described contact magnet move to described first position of the switch from described second switch position.

5. the approach switch that triggers of magnetic force according to claim 2, it is characterized in that, described contact magnet is arranged in columniform the second chamber be formed in described Switch main body, and the cylindrical surface that wherein limits at least in part described the second chamber is applicable to limit or stops described contact magnet along perpendicular to the direction of described body longitudinal axis, moving.

6. the approach switch of magnetic force triggering according to claim 1, is characterized in that, described contact magnet is shifted between described first position of the switch and described second switch position along described body longitudinal axis.

7. the approach switch that triggers of magnetic force according to claim 1, it is characterized in that, described the first normally closed contact, described the second normally closed contact, described first are normally opened each the described engaging arms that contact and described second normally opens in contact and are had the elongate form with longitudinal axis.

8. the approach switch that triggers of magnetic force according to claim 7, it is characterized in that, described the first normally closed contact, described the second normally closed contact, described first open normally that contact and described second normally opens in contact each have the adjutage of lengthening, the end of described adjutage along the direction that is parallel to described body longitudinal axis from described engaging arms extends.

9. the approach switch that triggers of magnetic force according to claim 7, it is characterized in that, the described longitudinal axis of the described engaging arms of each in described the first normally closed contact and described the second normally closed contact extends along the second reference planes perpendicular to described body longitudinal axis.

10. the approach switch that triggers of magnetic force according to claim 9, it is characterized in that, described first normally opens each the described longitudinal axis of described engaging arms that contact and described second normally opens in contact extends along the first reference planes parallel and that deviate from described the second reference planes.

11. the approach switch that magnetic force according to claim 10 triggers, is characterized in that, the first end setting of the contiguous described Switch main body of described bias component, and the second end setting of the contiguous described Switch main body of described the first reference planes.

12. the approach switch that magnetic force according to claim 7 triggers, it is characterized in that, it is cylindrical that described the first normally closed contact, described the second normally closed contact, described first are normally opened each the described engaging arms that contact and described second normally opens in contact.

13. the approach switch that magnetic force according to claim 2 triggers is characterized in that described contact magnet is gold-plated neodymium magnetic spheres.

14. the approach switch that magnetic force according to claim 1 triggers, is characterized in that, described Switch main body comprises the first half bodies and the second half bodies, and wherein said the first half bodies and described the second half bodies are cylindrical in conjunction with forming.

15. the approach switch that magnetic force according to claim 14 triggers is characterized in that described Switch main body is arranged in the cylindrical body sleeve.

16. the approach switch that magnetic force according to claim 15 triggers, is characterized in that, described the first half bodies, described the second half bodies and described body sleeve are comprised of plastics.