ELECTROMAGNETIC ACTUATOR, ELECTROMAGNETIC VALVE AND TACTILE DISPLAY MODULE

Abstract

The present disclosure relates to an electromagnetic actuator, an electromagnetic valve, and a tactile display module. According to one embodiment of the present disclosure, the electromagnetic actuator comprises a housing, a support bracket, a winding body, and a movable element. The support bracket is arranged within the housing and, together with the inner wall of the housing, encloses a tubular segment. The winding body is arranged surrounding the support bracket along the axial direction of the tubular segment. The movable element is at least partially arranged within the tubular segment and moves back and forth within the tubular segment or remains motionless. When energized, the winding body generates a magnetic field, wherein the movable element is exposed to an electromagnetic force in the magnetic field.Thus, the speed and direction of movement of the movable element can be changed by changing the magnitude or direction of the electromagnetic force by changing the supplied current or the direction of current flowing through the winding body.

Description

TECHNICAL FIELDThe present disclosure relates to the field of electrical technology, and more particularly, to an electromagnetic actuator, an electromagnetic valve, and a tactile display module.PRIOR ARTAn electromagnetic actuator refers to an actuator that converts electrical energy and mechanical energy into each other based on the electromagnetic principle. The energy conversion takes place in an air gap which separates a fixed component (also referred to as a stator or fixed contact) and a movable component (also referred to as a rotor or movable contact) of an actuator from one another. Electromagnetic actuators can be divided into electromagnetically driven rotary actuators and electromagnetically driven linear actuators depending on the types of movement. An existing electromagnetic actuator is only capable of being moved unidirectionally controllably and floating at a certain position.CONTENT OF THE PRESENT INVENTIONIn view of the foregoing, the present disclosure provides an electromagnetic actuator, an electromagnetic valve, and a tactile display module, thus enabling the electromagnetic actuator to be controllably moved and float at any position throughout the path upon reciprocation.According to an embodiment of the present disclosure, there is provided an electromagnetic actuator including a housing, a support bracket, a winding body, and a movable member. The support carrier is arranged within the housing and encloses a tubular segment together with the inner wall of the housing; the winding body is arranged along the axial direction of the tubular segment so as to surround the support carrier; the movable element is arranged at least partially in the tubular segment and moves back and forth in the tubular segment or remains non-movable. Thus, when the winding body is energized and generates a magnetic field, the movable element is subjected to an electromagnetic force in the magnetic field, and by changing the energization direction of the winding body, the direction of the electromagnetic force can be changed, thus changing the moving direction of the movable element.In one exemplary embodiment, the electromagnetic actuator further comprises a magnetic induction element provided on the support carrier, which magnetic induction element is arranged on an end region of the tubular segment.In one exemplary embodiment, the magnetic induction element comprises a first magnetic induction element and a second magnetic induction element. Here, the first magnetic induction element is disposed at one end of the tubular segment and the second magnetic induction element is disposed at the other end of the tubular segment; the movable element reciprocates or remains non-movable between the first magnetic induction element and the second magnetic induction element.In one exemplary embodiment, the projection of a path distance between the first magnetic induction element and the second magnetic induction element along the radial direction of the tubular segment is located within a winding zone of the winding body.In one embodiment, the winding body includes a first winding coil and a second winding coil. In this case, the first winding coil, after being energized, magnetizes the first magnetic induction element and the second winding coil, after being energized, magnetizes the second magnetic induction element, wherein the vector directions of the magnetic field strengths of the first magnetic induction element and of the second magnetic induction element are the same or opposite.In one embodiment, the movable element is subjected to one or more of the following forces; a first electromagnetic force in a magnetic field generated jointly by the first winding coil and the first magnetic induction element when energizing the first winding coil; a first permanent magnetic force from the first magnetic induction element; a second electromagnetic force in a magnetic field generated jointly by the second winding coil and the second magnetic induction element when energizing the second winding coil; or a second permanent magnetic force from the second magnetic induction element. Here, the magnetic field strength of the first magnetic induction element is controlled by selecting the energization direction and the supplied current strength of the corresponding first winding coil; the magnetic field strength of the second magnetic induction element is controlled by selecting the energization direction and the supplied current strength of the corresponding second winding coil.In one exemplary embodiment, the winding direction of the winding body on the first magnetic induction element is the same as its winding direction on the second magnetic induction element, wherein the winding body, after being energized, magnetizes the first magnetic induction element and the second magnetic induction element, wherein the vector directions of the magnetic field strengths of the first magnetic induction element and the second magnetic induction element are the same; or the winding direction of the winding body on the first magnetic induction element is the opposite as its winding direction on the second magnetic induction element, wherein the winding body, after being energized, magnetizes the first magnetic induction element and the second magnetic induction element, wherein the vector directions of the magnetic field strengths of the first magnetic induction element and the second magnetic induction element are the opposite.In an embodiment, the movable element is subjected to at least one of the following forces: an electromagnetic force in a magnetic field generated jointly by the winding body, the first magnetic induction element and the second magnetic induction element when the winding body is energized; a first permanent magnetic force from the first magnetic induction element; or a second permanent magnetic force from the second magnetic induction element. In this case, the magnetic field strength of the first magnetic induction element and the magnetic field strength of the second magnetic induction element are regulated by selecting the current direction and the supplied current strength of the corresponding winding body.In one embodiment, the movable element includes a rotor and a movable shaft connected to the rotor. At this time, the rotor is disposed in the tubular segment and reciprocates or remains non-movable in the tubular segment; the movable shaft extends along the axial direction of the tubular segment and protrudes from the housing.In one embodiment, the rotor is made of a permanent magnet material and the movable shaft is made of a non-magnetic material.In one exemplary embodiment, the support carrier comprises a winding section and a fastening section. The tubular segment passes through the winding section and the fastening section. The winding portion is wound on the winding body. The fixing portion is connected to at least one end of the winding portion along the axial direction of the tubular segment.In an embodiment, the winding portion includes a winding tube and a separation plate, the separation plate dividing the winding tube into a plurality of winding regions along the axial direction of the tubular segment.In an embodiment, the attachment portion is provided with a protrusion extending along the axial direction of the tubular segment in a first direction and a recess extending along the axial direction of the tubular segment in a second direction, wherein both the first direction and the second direction orthogonally intersect the axial direction of the tubular segment; wherein the width of the protrusion in the second direction is equal to the width of the recess in the first direction.In an embodiment, the electromagnetic actuator further comprises a pin inserted in the protrusion, wherein the winding body is energized via the pin.In the above-described electromagnetic actuator according to the embodiments of the disclosure, it is provided that, when energizing the winding body in the forward direction, the movable member is subjected to an electromagnetic force facing from one end of the tubular segment toward the other end, and the movable member can move from the one end of the tubular segment in the forward direction toward the other end; while, when energizing the winding body in the rearward direction, the movable member is subjected to an electromagnetic force facing from the other end of the tubular segment toward the one end, and the movable member can move from the other end of the tubular segment in the rearward direction toward the one end. Thus, reciprocation of the movable member in the tubular segment is achieved and control by an electromagnetic force is effected throughout the reciprocation, and the moving speed and other parameters are controllable. When the winding body is not energized, the movable member is not subjected to a force and can remain immobile in the tubular segment, thus achieving a floating effect.According to an embodiment of the present disclosure, there is provided an electromagnetic valve including an electromagnetic actuator according to any one of the above embodiments, a plunger, and a valve body. Here, the valve body is provided with at least two valve ports, and the plunger is connected to the movable member in the electromagnetic actuator. Thus, the movable element can set the piston in motion, so that the opening size of at least one of the valve connections is adjusted by the piston.In the above-described electromagnetic valve according to the embodiment of the disclosure, by using the electromagnetic actuator according to any one of the above embodiments, the opening size of the single valve port can be adjusted stably, thus accurately controlling the flow rate of a gas or a liquid passing through the electromagnetic valve.According to an embodiment of the present disclosure, there is provided a tactile display module including a plurality of electromagnetic actuators according to any one of the above embodiments and a motherboard. In this case, the plurality of electromagnetic actuators are arranged on the main board in a matrix-like manner.In the tactile display module according to the embodiment of the disclosure described above, by using the electromagnetic actuators according to any one of the above embodiments, a more accurate display effect can be achieved and extension can be realized more easily.It should be understood that the above general description and the following detailed description are merely exemplary in nature and are not intended to limit the present disclosure in any way.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a schematic structural view of an electromagnetic actuator according to an embodiment of the present disclosure, FIG. 2 is a longitudinal sectional view of the electromagnetic actuator according to an embodiment of the present disclosure, FIG. 3 is a longitudinal sectional view of the electromagnetic actuator according to another embodiment of the present disclosure, FIG. 4 is a schematic structural view of a support bracket according to an embodiment of the present disclosure, FIG. 5 shows a schematic structural view of the support carrier according to FIG. 4 from another angle of view, FIG. 6 is a schematic structural view of the support bracket according to another embodiment of the present disclosure, FIG. 7 is a schematic structural view showing the mounting of a plurality of electromagnetic actuators according to an embodiment of the present disclosure, FIG. 8 is a schematic structural view showing the mounting of a plurality of electromagnetic actuators according to another embodiment of the present disclosure, FIG. 9 is a longitudinal sectional view of a rotor moved up to a first magnetic induction element in the electromagnetic actuator according to FIG. 2 , FIG. 10 is a longitudinal sectional view of a rotor moved up to a second magnetic induction element in the electromagnetic actuator according to FIG. 2 , FIG. 11 is a schematic structural view of the first magnetic induction element according to an embodiment of the present disclosure, FIG. 12 is a schematic structural view of the second magnetic induction element according to an embodiment of the present disclosure, FIG. 13 is a schematic structural view of a closure cap according to an embodiment of the present disclosure, FIGS. 14 ato 14 ceach show a schematic structural view of an electromagnetic valve according to an embodiment of the present disclosure, FIGS. 15 ato 15 beach show a schematic structural view of the electromagnetic actuator according to another embodiment of the present disclosure, FIG. 16 is a schematic structural view of a tactile display module according to an embodiment of the present disclosure, FIG. 17 is a schematic structural view of the tactile display module according to another embodiment of the present disclosure, FIG. 18 is a schematic structural view of the tactile display module according to another embodiment of the present disclosure.DETAILED DESCRIPTIONIn order to better understand the object, configuration and advantages of the present disclosure, the present disclosure is discussed in more detail below with reference to the attached drawings on the basis of the specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present disclosure without limiting the scope of the disclosure.Unless otherwise defined, all technical and scientific terms used herein are intended to have the same meanings as those generally understood by those skilled in the art. The terms used in the description of the present disclosure are merely for describing the specific embodiments without limiting the disclosure.The electromagnetic actuator, the electromagnetic valve, and the tactile display module according to the present disclosure will be described below with reference to the accompanying drawings. Unless contradiction arises, the features in the following embodiments and embodiments can be combined with each other.As shown in FIGS. 1 and 2, an electromagnetic actuator 100 is provided in an embodiment of the present disclosure. It includes a housing 110, a support bracket 120, a winding body 130, and a movable member 140. The support support 120 is arranged within the housing 110 and encloses a tubular segment 12 atogether with the inner wall of the housing 110. The winding body 130 is disposed along the axial direction of the tubular segment 12 asurrounding the support bracket 120. The movable member 140 is at least partially disposed in the tubular segment 12 aand reciprocates or remains non-movable in the tubular segment 12 a. The winding body 130, when energized, generates a magnetic field in which the movable element 140 is subjected to an electromagnetic force. Thus, the moving direction of the movable member 140 can be changed by changing the direction of the electromagnetic force by changing the direction of current flowing through the winding body 130.When the winding body 130 is energized in the forward direction, the movable member 140 is subjected to an electromagnetic force facing toward the other end from one end of the tubular segment 12 a, and the movable member 140 may move toward the other end from the one end of the tubular segment 12 a(this may also be referred to as forward movement). When energizing the winding body 130 in the rearward direction, the movable member 140 is subjected to an electromagnetic force facing from the other end of the tubular segment 12 ato the one end, and the movable member 140 may move from the other end of the tubular segment 12 ato the one end (this may also be referred to as rearward movement). Thus, reciprocation of the movable member 140 in the tubular segment 12a is achieved, and control by an electromagnetic force is effected throughout the reciprocation, and the moving speed and other parameters are controllable.When the winding body 130 is not energized, the movable member 140 is not subjected to a force and can remain immobile in the tubular segment 12 a, thereby achieving a floating effect.In some embodiments, highly efficient reciprocating reaction can be achieved by changing the direction of electromagnetic force by changing the direction of current flowing through the winding body 130.In some embodiments, the moving speed of the movable member 140 may be changed by changing the magnitude of the electromagnetic force in the magnetic field by adjusting the supplied current of the winding body 130.In some embodiments, when floating at a certain position is required, the supplied current may be decreased in advance to decrease the moving speed of the movable member 140 until the movable member 140 floats at the desired position. It is understood that in this way, floating of the movable element 140 at any position in the tubular segment 12 acan be achieved.In some other embodiments, there is friction between the movable element 140 on the one hand and the housing 110 and / or the support beam 120 on the other hand, and floating of the movable element 140 may be achieved when the electromagnetic force to which the movable element 140 is subjected equals the friction.The above levitation method is characterized by low energy loss and high control accuracy, and can effectively solve the problem that related art electromagnetic actuators easily generate heat and have high energy loss and low accuracy.With regard to the specific structure of the electromagnetic actuator 100, in some exemplary embodiments, reference is further made to FIGS. 1 and 2. The housing 110 comprises a casing 111 and a closure cap 112. The casing 111 is hollow and has an opening. The closure cover 112 closes the opening. The two components are connected to one another and form a closed chamber 113, as a result of which magnetic field lines which are generated by the winding body 130 as a result of the energization thereof can be closed within the chamber 113. The sheath 111 and the closure cap 112 can be firmly connected to one another by means of a screw 170. Further, as shown in FIG. 13, a first mounting hole 1121 for passing the bolt 170 may be provided on the closure cap 112. The support bracket 120, the winding body 130, and at least a part of the movable member 140 are disposed inside the chamber 113.The shell 111 and the cap 112 may be made of industrial pure iron having an iron content of higher than 99.8% and are treated with rust preventive paint.As shown in FIG. 2, it is conceivable in the present exemplary embodiment that the electromagnetic actuator 100 further comprises a jacket 180 which is pushed onto the outside of the winding body 130. As the jacket 180, for example, a PVC plastic film can be used, which is pushed onto the outer circumference of the winding body 130 and, after heating, tightly envelopes the winding body 130. Thus, a short circuit of the winding body 130 with the casing 111 can be effectively prevented by the casing 180.As shown in FIG. 2, in some embodiments, the support bracket 120 is formed in a tubular shape, and the winding body 130 is wound on the outer surface of the support bracket 120. One end of the support bracket 120 abuts the inner surface of the shell 111 and the other end of the support bracket 120 abuts the inner surface of the closure cap 112. Thus, the both ends of the tube interior of the support bracket 120 are closed by the housing 110, thereby forming the tubular segment 12 a.In some embodiments, a portion of the movable member 140 is located within the tubular segment 12a while a portion of the movable member 140 protrudes from the housing 110. Thus, the electromagnetic actuator 100 can transmit outward movement.As is apparent from FIG. 2, in the present exemplary embodiment, it is provided in detail that the movable element 140 includes a rotor 141 and a movable shaft 142 connected to the rotor 141. The mover 141 is disposed in the tubular segment 12 aand reciprocates in the tubular segment 12 aor remains non-motive. The movable shaft 142 extends along the axial direction of the tubular segment 12 aand protrudes from the housing 110.Reference is further made to FIG. 2. In some embodiments, the rotor 141 is cylindrical and is fitted to the tubular segment 12a to facilitate movement. The diameter of the rotor 141 is slightly larger than the diameter of the movable shaft 142. On the housing 110, a through hole 114 for leading out the movable shaft 142 is provided. Further, the diameter of the through hole 114 is smaller than the diameter of the rotor 141, whereby it can be ensured that the rotor 141 is always located in the tubular segment 12 a.In some embodiments, an oil seal is provided between the movable shaft 142 and the inner wall of the through hole 114. Suitable friction may be provided between the movable shaft 142 and the inner wall of the through hole 114.In the present embodiment, the movable shaft 142 protrudes from the housing 110 at one location. In some other embodiments, the movable shaft 142 protrudes from the housing 110 at two locations.In some embodiments, the rotor 141 is made of a permanent magnet material and the movable shaft 142 is made of a non-magnetic material. Thus, only the rotor 141 is subjected to the action of an electromagnetic force. The rotor 141 is always located in the tubular segment 12 a, so that its volume remains fixed in the tubular segment 12 a. On the other hand, the movable shaft 142 constantly changes its length in the tubular segment 12 awith its movement, so that its volume in the tubular segment 12 achanges constantly. The rotor 141, which is made of a permanent magnet material, serves as a source of motion, thus facilitating the calculation of the electromagnetic force to which the rotor 141 is exposed and thus the design of the motion of the rotor 141.For example, the rotor 141 may be made of a rare earth powder Nd2Fe14B, the NdFeB magnet N35. The movable shaft 142 may be made of stainless steel, and 1Cr18Ni9Ti may be adopted as the non-magnetic steel.As shown in FIG. 3, in some embodiments, the electromagnetic actuator 100 may further include a magnetic induction member 160 provided on the support bracket 120 and disposed at an end portion of the tubular segment 12 a. For example, the magnetic induction element 160 is inserted into the tube interior of the support bracket 120 from one end of the support bracket 120.Thus, the magnetic induction element 160 can be magnetized by the magnetic field generated due to the energization of the winding body 130, on the one hand, and thus acts magnetically, and depending on the direction of the respective magnetic pole, an attractive or repulsive force is generated between it and the rotor 141. For example, when the rotor 141 moves up to the magnetic induction member 160 and an attractive force is generated between the magnetic induction member 160 and the rotor 141, the rotor 141 and the magnetic induction member 160 come into close contact with each other, and the rotor 141 can be effectively floated at this location. When a repulsive force is generated between the magnetic induction member 160 and the rotor 141, the magnetic induction member 160 can push out the rotor 141, thus increasing the operation efficiency of the electromagnetic actuator 100.On the other hand, when the magnetic induction member 160 and the rotor 141 are allowed to attract each other when the winding body 130 is energized, when the rotor 141 is moved up to the magnetic induction member 160, the winding body 130 can be de-energized, so that the rotor 141 adheres to the magnetic induction member 160 and thus stopping without energy loss is achieved.In some embodiments, the magnetic induction element 160 may use an amorphous iron-based alloy such that the magnetic induction element 160 has a narrow B-H loop and is thus characterized by high magnetic conductivity and low loss. Here, the electric resistivity is twice to three times higher than that of a crystalline alloy, which is also useful for reducing the eddy current loss. The magnetic induction element 160 may alternatively use industrial pure iron having an iron content of greater than 99.8% or another material. Industrial pure iron having an iron content of more than 99.8% can be treated with rust preventive coating.Reference is made to Figures 4 to 6. In some embodiments, the support beam 120 includes a winding portion 121 and a fastening portion 122. The tubular segment 12 apass through the winding portion 121 and the fastening portion 122. The winding body 130 is wound on the winding portion 121. The fixing portion 122 is disposed at at least one end of the winding portion 121 along the axial direction z of the tubular segment 12 a.The tubular segment 12a passes through the entire support beam 120, thereby allowing more space to be obtained. The winding portion 121 and the fixing portion 122 are connected to each other along the axial direction z of the tubular segment 12 a. In the embodiment of FIGS. 4 to 6, the support beam 120 includes the winding portion 121 and the fixing portion 122 disposed at one end of the winding portion 121. In some other embodiments, the support beam 120 may include the winding portion 121 and two fixing portions 122 disposed at two ends of the winding portion 121.In the embodiment of Figs. 4 to 6, one end of the winding portion 121 is connected to the fixing portion 122, and the other end is provided with an annular bulge 123 serving to confine the winding body 130. The tubular segment 12a is also disposed passing through the annular bulge 123. It is also conceivable that the outer diameter of the annular bulge 123 is equal to the inner diameter of the shell 111, so that the annular bulge 123 abuts against the inner wall of the shell 111 in the radial direction of the tubular segment 12 ato thereby fasten the support bracket 120.Furthermore, in some exemplary embodiments, it is provided that the winding section 121, as can be seen further from FIGS. 4 to 6, comprises a winding tube 1211 and a separating plate 1212. At this time, the partition plate 1212 serves to partition the winding tube 1211 into a plurality of winding regions 12121 along the axial direction z of the tubular segment 12 a. By dividing the winding tube 1211 having a large length into a plurality of winding regions 12121 having a small length, more uniform winding of the winding body 130 can be achieved.In some exemplary embodiments, a wire cutout 12122 for passing the winding body 130 through is provided on the separating plate 1212 in order to enable connection to the winding body 130 of different winding regions 12121. In detail, a plurality of wire recesses 12122 may be provided on the partition plate 1212. In the embodiment shown in FIGS. 4 to 6, four wire recesses 12122 are provided in a matrix manner on the annular partition plate 1212 in the circumferential direction.In some exemplary embodiments, the winding body 130 is one and the same winding coil and is arranged individually in different winding regions 12121. In some other embodiments, the winding body 130 includes a plurality of winding coils and a winding coil is associated with one or more winding portions 12121.Reference is also made to FIGS. 4 to 6. In some exemplary embodiments, the fastening portion 122 is provided in a first direction x with a projection 1221 extending along the axial direction z of the tubular segment 12 aand is provided in a second direction y with a recess 1222 likewise extending along the axial direction z of the tubular segment 12 a. In this case, both the first direction x and the second direction y orthogonally intersect the axial direction z of the tubular segment 12 a. The width of the protrusion 1221 in the second direction y is equal to the width of the recess 1222 in the first direction x. Thus, the protrusion 1221 can be inserted into the recess 1222 along the axial direction z of the tubular portion 12 a. As can be seen from FIGS. 7 and 8, when using a plurality of electromagnetic actuators 100, the plurality of electromagnetic actuators 100 can be mounted in this way.In the exemplary embodiment according to FIGS. 4 to 6, the fastening section 122 comprises protruding segments 1223, and the cutout 1222 is formed between two protruding segments 1223. The projection 1221 is flush with the protruding segments 1223 at an end located close to the winding tube 1211 in the axial direction z of the tubular segment 12 a, while the other end protrudes beyond the protruding segments 1223.In some exemplary embodiments, a wire cutout 1224 is formed clamped between the projection 1221 and the respective protruding segment 1223, which cutout makes it possible for the winding body 130 to pass through.The support beam 120 may be made of glass fiber reinforced nylon by injection molding using a precision mold.Reference is made to FIGS. 3 to 6. It is further provided that the electromagnetic actuator 100 further comprises a pin 150 which is inserted in the projection 1221, wherein the winding body 130 is energized via the pin 150. In detail, the winding body 130 is welded to the pin 150. As shown in FIGS. 5 and 6, the protrusion 1221 is provided with a hole 12211 that allows the pin 150 to pass therethrough. In the present embodiment, the pin 150 protrudes from the protrusion 1221 and extends out of the electromagnetic actuator 100 through the shutter cap 112. Accordingly, as shown in FIG. 13, a second mounting hole 1122 for passing the pin 150 is provided on the closure cap 112. As can be seen from FIG. 5, in some embodiments, the electromagnetic actuator 100 is provided with a pair of holes 12211 to pass a pair of pins 150 therethrough to thereby energize a winding coil. In some other exemplary embodiments, it is conceivable that in the electromagnetic actuator 100, a plurality of pairs of holes 12211 are provided on the protrusion 1221 of the fastening portion 122 of the support bracket 120 in order to pass a plurality of pairs of pins 150 and thus to current different winding coils. For example, as shown in FIG. 6, in the electromagnetic actuator 100, two pairs of holes 12211 are provided on the protrusion 1221 of the fixing portion 122 of the support bracket 120 to pass two pairs of pins 150 and thus to current two winding coils.As shown in FIG. 3, in some embodiments, the magnetic induction element 160 includes a first magnetic induction element 161 and a second magnetic induction element 162. Here, the first magnetic induction member 161 is disposed at one end of the tubular segment 12 aand the second magnetic induction member 162 is disposed at the other end of the tubular segment 12 a. The movable member 140 reciprocates between the first magnetic induction member 161 and the second magnetic induction member 162 or remains non-movable. By respectively disposing the first magnetic induction member 161 and the second magnetic induction member 162 at two ends of the tubular segment 12 aand disposing the travel path of the movable member 140 between the first magnetic induction member 161 and the second magnetic induction member 162, the reciprocating motion of the movable member 140 has a start point and an end point that are clearly defined. When the movable member 140 moves near one of the first magnetic induction member 161 and the second magnetic induction member 162, it can be attracted thereby, thus achieving stopping within a short time. As shown in FIG. 9, the rotor 141 is stopped in the movable member 140 as it moves up to the first magnetic induction member 161; alternatively, the rotor 141 is stopped in the movable member 140 as it moves up to the second magnetic induction member 162, as shown in FIG. 10.In detail, in the present embodiment, reference is made to FIGS. 3 to 6, and FIGS. 11 and 12. The first magnetic induction member 161 includes a positioning portion 1611 and a fitting portion 1612. The positioning portion 1611 is clamped between the shell 111 and the annular bulge 123. The plug portion 1612 is inserted into the support bracket 120. The movable shaft 142 in the movable member 140 passes through the first magnetic induction member 161 and the shell 111. Friction may also be provided between the movable shaft 142 and the first magnetic induction member 161. The second magnetic induction member 162 is inserted into the fixing portion 122 of the support bracket 120. The rotor 141 in the movable member 140 reciprocates between the first magnetic induction member 161 and the second magnetic induction member 162 or remains non-movable.Reference is made to FIGS. 9 and 10. Furthermore, it is provided that the projection of a path distance between the first magnetic induction element 161 and the second magnetic induction element 162 along the radial direction of the tubular segment 12 ais located within a winding zone of the winding body 130. Thus, the rotor 141 in the movable member 140 can always be excited in an effective magnetic field generated by the winding body 130, thus facilitating the calculation of the electromagnetic force.In some embodiments, the winding direction of the winding body 130 at the first magnetic induction element 161 is equal to the winding direction at the second magnetic induction element 162. Thus, the vector directions of the magnetic field strengths of the first magnetic induction element 161 and the second magnetic induction element 162 magnetized after energizing the winding body 130 are the same. In detail, in some embodiments, the winding portion 121 is provided with a partition plate 1212 that divides the winding tube 1211 into two winding regions 12121 along the axial direction of the tubular segment 12 a. At this time, one of the winding portions 12121 is disposed close to the first magnetic induction member 161 in the axial direction of the tubular segment 12 a, while the other winding portion 12121 is disposed close to the second magnetic induction member 162 in the axial direction of the tubular segment 12 a. The winding body 130 has a same winding direction in the two winding portions 12121, and is wound in the forward direction, for example.In some other embodiments, the winding direction of the winding body 130 at the first magnetic induction element 161 is opposite to the winding direction at the second magnetic induction element 162. Thus, the vector directions of the magnetic field strengths of the first magnetic induction element 161 and the second magnetic induction element 162 magnetized after energizing the winding body 130 are opposite. In detail, in some embodiments, the winding portion 121 is provided with a partition plate 1212 that divides the winding tube 1211 into two winding regions 12121 along the axial direction of the tubular segment 12 a. At this time, one of the winding portions 12121 is disposed close to the first magnetic induction member 161 in the axial direction of the tubular segment 12 a, while the other winding portion 12121 is disposed close to the second magnetic induction member 162 in the axial direction of the tubular segment 12 a. The winding body 130 has opposite winding directions in the two winding regions 12121. For example, the winding body 130 wound close to the first magnetic induction member 161 is wound in the forward direction, and the winding body 130 wound close to the second magnetic induction member 162 is wound in the backward direction.In the present embodiment, the winding body 130 is one winding coil or a plurality of winding coils having a same direction of current. The first magnetic induction element 161 and the second magnetic induction element 162 are simultaneously controlled by the winding body 130, so that the first magnetic induction element 161 and the second magnetic induction element 162 have the same or opposite pole directions. In the example of the electromagnetic actuator 100 shown in FIG. 3, when the winding direction of the winding body 130 on the first magnetic induction element 161 is the same as the winding direction on the second magnetic induction element 162, after the winding body 130 is energized with respect to the direction of the drawing, the upper end of the first magnetic induction element 161 is an N pole and the lower end thereof is an S pole, while in the second magnetic induction element 162, the upper end is an N pole and the lower end is an S pole. When the winding direction of the winding body 130 on the first magnetic induction member 161 is opposite to the winding direction on the second magnetic induction member 162, after energizing the winding body 130, the upper end of the first magnetic induction member 161 is an N pole and the lower end thereof is an S pole, and the second magnetic induction member 162 has the upper end thereof an S pole and the lower end thereof an N pole, as to the direction of the drawing.In some embodiments, the movable element 140 is subjected to an electromagnetic force in a magnetic field generated jointly by the winding body 130, the first magnetic induction element 161, and the second magnetic induction element 162. In detail, in some exemplary embodiments, it is provided that, when the winding body 130 is energized, the movable element 140 is exposed to a first electromagnetic force generated by the magnetized first magnetic induction element 161, a second electromagnetic force generated by the magnetized second magnetic induction element 162, and a third electromagnetic force generated by the energized winding body 130. In the example of the electromagnetic actuator 100 shown in FIG. 3, after energizing the winding body 130 wound in the same direction with respect to the direction of the drawing, the first magnetic induction element 161 has the upper end as an N pole and the lower end as an S pole, the second magnetic induction element 162 has the upper end as an N pole and the lower end as an S pole, and the rotor 141 has the upper end as an N pole and the lower end as an S pole. Thus, the upper end of the rotor 141 is exposed to the upward first electromagnetic force from the first magnetic induction element 161, while the lower end of the rotor 141 is exposed to the downward second electromagnetic force from the second magnetic induction element 162. The rotor 141 is further exposed to the upward third electromagnetic force from the winding body 130. Further, when the winding body 130 is energized, the upper end of the rotor 141 is exposed to an upward first permanent magnetic force from the first magnetic induction element 161, while the lower end of the rotor 141 is exposed to a downward second permanent magnetic force from the second magnetic induction element 162. Further, the rotor 141 is further subjected to gravity and friction. Under the combined action of the above seven forces, the mover 141 moves or remains non-moving.In some embodiments, the magnetic field strength of the first magnetic induction element 161 and the magnetic field strength of the second magnetic induction element 162 are controlled by selecting the current direction and the supplied current strength of the corresponding winding body 130. By controlling the energization direction of the winding body 130, the vector directions of the magnetic strengths of the first magnetic induction element 161 and the second magnetic induction element 162 can be changed. That is, thus, the directions of the first electromagnetic force and the second electromagnetic force are changed. In the example of the electromagnetic actuator 100 shown in FIG. 3, after energizing the winding body 130 in the forward direction with respect to the direction of the drawing, the first magnetic induction element 161 has the upper end of an N pole and the lower end of an S pole, and the second magnetic induction element 162 has the upper end of an N pole and the lower end of an S pole. After energizing the winding body 130 in the reverse direction, it is true that, with respect to the direction of the drawing, the upper end is an S pole and the lower end is an N pole in the first magnetic induction element 161, and the upper end is an S pole and the lower end is an N pole in the second magnetic induction element 162. The movement of the rotor 141 can be controlled by changing the magnitudes of the first electromagnetic force and the second electromagnetic force by controlling the supplied current of the winding body 130.As shown in FIG. 3, in some other embodiments, the winding body 130 includes a first winding coil 131 and a second winding coil 132. The first winding coil 131 magnetizes the first magnetic induction element 161 after being energized, and the second winding coil 132 magnetizes the second magnetic induction element 162 after being energized. By controlling the energization directions of the first winding coil 131 and the second winding coil 132, the vector directions of the magnetic strengths of the first magnetic induction element 161 and the second magnetic induction element 162 can be made to be the same or opposite. In other words, the pole directions of the first magnetic induction element 161 and the second magnetic induction element 162 can be flexibly controlled to be the same or different because the first winding coil 131 and the second winding coil 132 respectively control the first magnetic induction element 161 and the second magnetic induction element 162. In the example of the electromagnetic actuator 100 shown in FIG. 3, when the first winding coil 131 is energized in the forward direction and the second winding coil 132 is energized in the forward direction with respect to the direction of the drawing, the first magnetic induction element 161 has the upper end of an N pole and the lower end of an S pole, and the second magnetic induction element 162 has the upper end of an N pole and the lower end of an S pole. Further, when energizing the first winding coil 131 in the forward direction and energizing the second winding coil 132 in the reverse direction, in the direction of the drawing, the first magnetic induction element 161 has the upper end as an N pole and the lower end as an S pole, and the second magnetic induction element 162 has the upper end as an S pole and the lower end as an N pole.In some embodiments, the movable element 140 is exposed to the first electromagnetic force in a magnetic field generated jointly by the energized first winding coil 131 and the magnetized first magnetic induction element 161. In detail, in some embodiments, it is provided that, when the first winding coil 131 is energized, the movable element 140 is exposed to the first electromagnetic force generated by the magnetized first magnetic induction element 161, and the movable element 140 is exposed to a first coil electromagnetic force generated by the first winding coil 131.In some embodiments, the movable element 140 is exposed to the second electromagnetic force in a magnetic field generated jointly by the energized second winding coil 132 and the magnetized second magnetic induction element 162. In detail, in some embodiments, it is provided that when the second winding coil 132 is energized, the movable element 140 is exposed to the second electromagnetic force generated by the magnetized second magnetic induction element 162 and the movable element 140 is exposed to a second coil electromagnetic force generated by the second winding coil 132.In the example of the electromagnetic actuator 100 shown in FIG. 3, when the first winding coil 131 is energized in the forward direction and the second winding coil 132 is energized in the reverse direction with respect to the direction of the drawing, the first magnetic induction element 161 has the upper end of an N pole and the lower end of an S pole, the second magnetic induction element 162 has the upper end of an S pole and the lower end of an N pole, and the rotor 141 has the upper end of an N pole and the lower end of an S pole. Now, the rotor 141 is exposed to the upward first electromagnetic force, and the upper end of the rotor 141 is exposed to the upward first electromagnetic force from the first magnetic induction element 161 and the upward electromagnetic force of the first coil from the first winding coil 131, while the lower end of the rotor 141 is exposed to the upward second electromagnetic force from the second magnetic induction element 162 and the downward electromagnetic force of the second coil from the second winding coil 132. The upper end of the rotor 141 is further exposed to the upward first permanent magnetic force from the first magnetic induction element 161, while the lower end of the rotor 141 is further exposed to the downward second permanent magnetic force from the second magnetic induction element 162. Further, the rotor 141 is also subjected to gravity and friction. Under the combined action of the above eight forces, the mover 141 moves or remains non-moving.In some embodiments, the magnetic field strength of the first magnetic induction element 161 is controlled by selecting the current direction and the supplied current strength of the corresponding first winding coil 131. In some embodiments, the magnetic field strength of the second magnetic induction element 162 is controlled by selecting the current direction and the supplied current strength of the corresponding second winding coil 132. By controlling the energization directions of the first winding coil 131 and the second winding coil 132, the vector directions of the magnetic strengths of the first magnetic induction element 161 and the second magnetic induction element 162 can be changed. That is, thus, the directions of the first permanent magnet force and the second permanent magnet force are changed, and further, the directions of the first electromagnetic force and the second electromagnetic force can be changed. The movement of the rotor 141 is controlled by being able to change the magnitudes of the first electromagnetic force and the second electromagnetic force by controlling the supplied current of the first winding coil 131 and the second winding coil 132.In some exemplary embodiments, when the winding body 130 is not energized, the movable element 140 is exposed to the first permanent magnetic force from the first magnetic induction element 161. Thus, with the rotor 141 moved up to the first magnetic induction member 161, the winding body 130 can be de-energized, so that the rotor 141 can adhere to the first magnetic induction member 161 due to the first permanent magnetic force, and thus stopping without energy loss is achieved.In some exemplary embodiments, it is conceivable that the movable element 140 is exposed to the second permanent magnetic force from the second magnetic induction element 162 when the winding body 130 is not energized. Thus, with the rotor 141 moved up to the second magnetic induction member 162, the winding body 130 can be de-energized, so that the rotor 141 can adhere to the second magnetic induction member 162 due to the second permanent magnetic force, and thus stopping without energy loss is achieved.Reference is made to Figs. 14a to 14c and Figs. 15a and 15b. In an embodiment of the present disclosure, there is further provided an electromagnetic valve 200 including the electromagnetic actuator 100 according to any one of the above embodiments, a plunger 210, and a valve body 220. The valve body 220 is provided with at least two valve ports 221. The piston 210 is connected to the movable member 140 of the electromagnetic actuator 100, and the movable member 140 drives the piston 210 to move, so that the opening amount of at least one of the valve ports 221 is adjusted by the piston 210. By using the electromagnetic actuator 100 according to the present disclosure in the electromagnetic valve, the opening size of the single valve port 221 can be adjusted stably, thus accurately regulating the flow rate of a gas or a liquid passing through the electromagnetic valve 200.In detail, in the embodiment of Figs. 14a to 14c, the electromagnetic valve 200 is provided with two valve ports, namely, a valve port 221a and a valve port 221b, and the opening amount of the valve port 221a is adjusted by the plunger 210. FIGS. 14 ato 14 c show a gradual enlargement of the valve port 221 aby a movement of the plunger 210 under the drive of the movable member 140, and thereby the flow rate of the gas or liquid passing through the electromagnetic valve 200 is gradually increased.In the embodiment of FIGS. 15 aand 15 b, the electromagnetic valve 200 is provided with three valve ports, namely, a valve port 221 c, a valve port 221 d, and a valve port 221 e, and the opening amounts of the valve port 221 cand the valve port 221 dare adjusted by the plunger 210. As shown in FIG. 15 a, the piston 210 is made to move up to the valve port 221 dby the movable member 140, and the valve port 221 dis closed, so that the gas or the liquid flows in via the valve port 221 cand flows out via the valve port 221 e. As shown in FIG. 15 b, the piston 210 is made to move up to the valve port 221 cby the movable member 140, and the valve port 221 cis closed, so that the gas or the liquid flows in via the valve port 221 dand flows out via the valve port 221 e.In an embodiment of the present disclosure, as shown in FIGS. 16 to 18, a tactile display module 300 including a plurality of electromagnetic actuators 100 according to any one of the above embodiments and a motherboard 310 is further provided. In this case, the plurality of electromagnetic actuators 100 are arranged on the main board 310 in a matrix-like manner. By using the electromagnetic actuator 100 according to the present disclosure in the tactile display module 300, a more accurate display effect can be achieved and extension can be realized more easily.The plurality of electromagnetic actuators 100 are electrically connected to the skin board 310, and each electromagnetic actuator 100 is individually controlled.The tactile display module 300 may be a blinded text display module. The embodiment of FIG. 16 is a six-dot blind font display module, and six electromagnetic actuators 100 are arranged according to the dimension of the blind fonts and combined with each other. The embodiment of FIG. 17 is an eight-dot blind font display module, and eight electromagnetic actuators 100 are arranged according to the dimension of the blind fonts and combined with each other. Further, a driver board and a control interface are mounted thereon, whereby accurate independent control of each of the blind spots can be realized.The tactile display module 300 may further be a pixel array display module. The embodiment of Fig. 18 is a twenty-five dot matrix display module, and twenty-five electromagnetic actuators 100 are equally spaced in five rows and five columns and are combined with each other. The main board 310 is a driver board, and a USB-C control interface 311 is provided on the main board 310, whereby accurate independent control of each of the items can be realized.It is understood in the description of the present disclosure that the terms "center", "longitudinal direction", "transverse direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "uppermost", "lowermost", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential direction", etc. are used with reference to the orientation or positional relationship illustrated in the respective figure, respectively, to describe only the disclosure and simplify the description as appropriate. In other words, these terms are used to indicate neither in-depth nor explicitly the positioning and the configuration and operation of the relevant device or of the relevant element in a predetermined positioning, and therefore there is no restriction on the disclosure here.Furthermore, it should be noted that the terms "first" and "second" should not be understood as an explicit or in-depth indication of the relative importance or of the number of features involved. Instead, these are used, inter alia, merely for description. Therefore, features that are determined in more detail by "first" and "second", among other things, can be assumed to include at least one such feature as an implicit or explicit indication. In the description of the present disclosure, the term "multiple" refers to a number of at least two, for example two or three, etc., unless expressly defined otherwise.In the present disclosure, the terms "attachment", "connected to each other", "connection", "fastening" or the like should be understood in the broader sense unless expressly stated or defined otherwise. Thus, for example, this can be a fixed, a releasable or a one-piece connection as well as a mechanical and also an electrical connection. In addition, direct connections, indirect connections or connections produced via an intermediate piece, as well as internal connections of two elements or interactions of two elements are also conceivable, unless expressly defined otherwise. One of ordinary skill in the art may be based on the subject to determine what meaning the terms mentioned are intended to be in accordance with the present disclosure.In the present disclosure, a first feature disposed "above" or "below" a second feature may be, unless expressly stated or defined otherwise, the case that the first feature directly contacts the second feature or that the first and second features indirectly contact each other via an intermediate piece. Moreover, in the case of a first feature which is arranged "on", "over" a second feature and "above" the second feature, it may be the case that the first feature lies directly over or obliquely over the second feature, or that the horizontal height position of the first feature is higher than that of the second feature. In the case of a first feature which is arranged "under" a second feature and "below" the second feature, it may be the case that the first feature lies directly under or obliquely under the second feature, or that the horizontal height position of the first feature lies lower than that of the second feature.It should be noted that, in the case of an element which is "fastened", "arranged", "fixedly arranged" or "attached" to another element, said element can be arranged both directly on the other element and via an intermediate element on the other element. In the case of an element "connected" to another element, it can be connected to the other element directly or simultaneously via an intermediate element. In an element that is "fixedly connected" to another element, it can be assumed that the two elements are fastened to one another by a detachable connection or, alternatively, are fastened to one another by a non-detachable connection. For example, inter alia, sliding on, latching connection, fastening by integral shaping and welding are conceivable for this purpose. This can be realized by conventional technology and further explanation is omitted herein.The technical features of the above embodiments may be combined arbitrarily, and for brevity of description, description of all possible combinations of the various technical features in the above embodiments will be omitted here. Unless the combination of these technical features is conflicting, it should be considered as part of the scope of the present description.The above embodiments describe in detail only some embodiments of the disclosure and therefore should not be construed as limiting the scope of the invention. It should be noted that various variants and refinements are possible for those skilled in the art without departing from the basic idea of the present disclosure, which are intended to belong to the scope of protection of the disclosure.

Claims

An electromagnetic actuator comprising: a housing; a support bracket disposed within the housing and enclosing a tubular segment together with the inner wall of the housing; a winding body disposed along the axial direction of the tubular segment so as to surround the support bracket; and a movable member disposed at least partially in the tubular segment and reciprocating or remaining non-moving in the tubular segment, wherein the winding body generates a magnetic field upon energization thereof, wherein the movable member is subjected to an electromagnetic force in the magnetic field, wherein by changing the energization direction of the winding body, the direction of the electromagnetic force is changed so as to change the movement direction of the movable member.The electromagnetic actuator of claim 1, further comprising a magnetic induction element provided on the support beam disposed at an end portion of the tubular segment.The electromagnetic actuator of claim 2, characterized in that the magnetic induction member comprises: a first magnetic induction member disposed at one end of the tubular segment and a second magnetic induction member disposed at the other end of the tubular segment; wherein the movable member reciprocates or remains immobile between the first magnetic induction member and the second magnetic induction member.Electromagnetic actuator according to Claim 3, characterized in that the projection of a distance between the first magnetic induction element and the second magnetic induction element along the radial direction of the tubular segment is located within a winding zone of the winding body.The electromagnetic actuator according to claim 3, characterized in that the winding body comprises: a first winding coil that, after being energized, magnetizes the first magnetic induction element; and a second winding coil that, after being energized, magnetizes the second magnetic induction element, wherein the vector directions of the magnetic field strengths of the first magnetic induction element and the second magnetic induction element are the same or opposite.The electromagnetic actuator of claim 5, characterized in that the movable element is subjected to one or more of the following forces: a first electromagnetic force in a magnetic field generated jointly by the first winding coil and the first magnetic induction element when energizing the first winding coil; a first permanent magnetic force from the first magnetic induction element; a second electromagnetic force in a magnetic field generated jointly by the second winding coil and the second magnetic induction element when energizing the second winding coil; or a second permanent magnetic force from the second magnetic induction element; wherein the magnetic field strength of the first magnetic induction element is controlled by selecting the energizing direction and the supplied current strength of the corresponding first winding coil; wherein the magnetic field strength of the second magnetic induction element is controlled by selecting the energizing direction and the supplied current strength of the corresponding second winding coil.Electromagnetic actuator according to Claim 3, characterized in that the winding direction of the winding body on the first magnetic induction element is identical to its winding direction on the second magnetic induction element, wherein the winding body, after being energized, magnetizes the first magnetic induction element and the second magnetic induction element, wherein the vector directions of the magnetic field strengths of the first magnetic induction element and of the second magnetic induction element are identical; or the winding direction of the winding body on the first magnetic induction element is opposite to its winding direction on the second magnetic induction element, wherein the winding body, after being energized, magnetizes the first magnetic induction element and the second magnetic induction element, wherein the vector directions of the magnetic field strengths of the first magnetic induction element and of the second magnetic induction element are opposite.The electromagnetic actuator according to claim 7, characterized in that the movable element is subjected to at least one of the following forces: an electromagnetic force in a magnetic field generated jointly by the winding body, the first magnetic induction element and the second magnetic induction element when energizing the winding body; a first permanent magnet force from the first magnetic induction element; or a second permanent magnet force from the second magnetic induction element; wherein the magnetic field strength of the first magnetic induction element and the magnetic field strength of the second magnetic induction element are controlled by selecting the energizing direction and the supplied current strength of the corresponding winding body.The electromagnetic actuator according to any one of claims 1 to 8, characterized in that the movable member comprises: a mover disposed in the tubular segment and reciprocating or remaining non-movable in the tubular segment; and a movable shaft connected to the mover, extending along the axial direction of the tubular segment, and protruding from the housing.Electromagnetic actuator according to Claim 9, characterized in that the rotor consists of a permanent magnet material, the movable shaft consists of a non-magnetic material.The electromagnetic actuator according to claim 1, characterized in that the support bracket comprises: a winding portion on which the winding body is wound; and a fixing portion connected to at least one end of the winding portion along the axial direction of the tubular segment, the tubular segment passing through the winding portion and the fixing portion.The electromagnetic actuator according to claim 11, characterized in that the winding portion includes a winding tube and a separation plate, the separation plate dividing the winding tube into a plurality of winding regions along the axial direction of the tubular segment.The electromagnetic actuator according to claim 11, characterized in that the fixing portion is provided with a protrusion extending along the axial direction of the tubular segment in a first direction, the fixing portion is provided with a recess extending along the axial direction of the tubular segment in a second direction, wherein both the first direction and the second direction orthogonally intersect the axial direction of the tubular segment; and wherein the width of the protrusion in the second direction is equal to the width of the recess in the first direction.The electromagnetic actuator of claim 13, characterized in that the electromagnetic actuator further comprises a pin inserted into the protrusion, wherein the winding body is energized via the pin.An electromagnetic valve comprising: a valve body provided with at least two valve ports; a piston; and an electromagnetic actuator according to any one of claims 1 to 14, wherein the movable element of the electromagnetic actuator is connected to the piston, and the movable element drives the piston to move so that the opening amount of at least one of the valve ports is adjusted by the piston.A tactile display module comprising: a plurality of electromagnetic actuators according to any one of claims 1 to 14; and a motherboard on which the plurality of electromagnetic actuators are arrayed in a matrix manner.

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