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 an embodiment of the present disclosure, the electromagnetic actuator comprises a housing, a supporting frame, a coil body, and a moving member. The supporting frame is arranged in the housing, and defines a tubular section together with the inner wall of the housing. The coil body is arranged around the supporting frame in the axial direction of the tubular section. At least part of the moving member is arranged in the tubular section and reciprocates or keeps stationary in the tubular section. When the coil body is electrified to generate a magnetic field, the moving member undergoes electromagnetic force in the magnetic field. Therefore, the magnitude or direction of the electromagnetic force is changed by changing the magnitude or direction of the current flowing through the coil body, so that the movement speed and direction of the moving member can be changed.

Description

Electromagnetic actuators, solenoid valves, and tactile display modules Technical Field

[0001] The present disclosure relates to the field of electric power technology, and in particular to an electromagnetic actuator, a solenoid valve, and a tactile display module. Background Art

[0002] An electromagnetic actuator is an actuator that converts electrical energy into mechanical energy based on the electromagnetic principle. This energy conversion occurs across an air gap that separates the actuator's fixed component (also called a stator or fixed contact) and moving component (also called a rotor or moving contact). Electromagnetic actuators can be categorized by their motion type as either electromagnetically driven rotary actuators or electromagnetically driven linear actuators. Existing electromagnetic actuators only offer the ability to achieve one-way, controlled motion and hover at a specific position.

[0003] Summary of the Invention

[0004] In view of this, the present disclosure provides an electromagnetic actuator, a solenoid valve, and a tactile display module, so as to enable the electromagnetic actuator to achieve controlled movement throughout the entire back-and-forth movement and hover at any position.

[0005] According to one embodiment of the present disclosure, an electromagnetic actuator is provided, which includes a shell, a support frame, a coil body and a moving part. The support frame is arranged in the shell, and is enclosed with the inner wall of the shell to form a tubular section; the coil body is arranged around the support frame along the axial direction of the tubular section; at least part of the moving part is arranged in the tubular section, and reciprocates or remains stationary in the tubular section. In this way, when the coil body is energized to generate a magnetic field, the moving part is subjected to an electromagnetic force in the magnetic field, and the direction of the electromagnetic force can be changed by changing the energization direction of the coil body, thereby changing the movement direction of the moving part.

[0006] In one embodiment, the electromagnetic actuator further comprises a magnetic induction element provided on the support frame, and the magnetic induction element is provided at an end portion of the tubular section.

[0007] In one embodiment, the magnetic sensing element includes a first magnetic sensing element and a second magnetic sensing element. The first magnetic sensing element is provided at one end of the tubular section, and the second magnetic sensing element is provided at the other end of the tubular section. The moving element reciprocates between the first magnetic sensing element and the second magnetic sensing element or remains stationary.

[0008] In one embodiment, a projection of the travel section between the first magnetic induction element and the second magnetic induction element along the radial direction of the tubular section is located within the winding interval of the coil body.

[0009] In one embodiment, the coil body includes a first coil winding and a second coil winding. When energized, the first coil winding magnetizes the first magnetic induction element, and when energized, the second coil winding magnetizes the second magnetic induction element. 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.

[0010] In one embodiment, the movable member is subjected to one or more of the following forces: a first electromagnetic force in the magnetic field jointly generated by the first coil winding and the first magnetic induction member when the first coil winding is energized; a first permanent magnetic force from the movable member; a second electromagnetic force in the magnetic field jointly generated by the second coil winding and the second magnetic induction member when the second coil winding is energized; or a second permanent magnetic force from the second magnetic induction member. The magnetic field strength of the first magnetic induction member is controlled by selecting the corresponding energization direction and current of the first coil winding; and the magnetic field strength of the second magnetic induction member is controlled by selecting the corresponding energization direction and current of the second coil winding.

[0011] In one embodiment, the winding direction of the coil body at the first magnetic induction element is the same as the winding direction at the second magnetic induction element. After the coil body is energized, it magnetizes the first magnetic induction element and the second magnetic induction element, and 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 coil body at the first magnetic induction element is opposite to the winding direction at the second magnetic induction element. After the coil body is energized, it magnetizes the first magnetic induction element and the second magnetic induction element, and the vector directions of the magnetic field strengths of the first magnetic induction element and the second magnetic induction element are opposite.

[0012] In one embodiment, the movable element is subjected to at least one of the following forces: an electromagnetic force in the magnetic field generated by the coil body, the first magnetic element, and the second magnetic element when the coil body is energized; a first permanent magnetic force from the first magnetic element; or a second permanent magnetic force from the second magnetic element. The magnetic field strengths of the first magnetic element and the second magnetic element are controlled by selecting the direction and current of the coil body.

[0013] In one embodiment, the moving member includes a mover and a moving shaft connected to the mover, wherein the mover is disposed within the tubular section and reciprocates or remains stationary within the tubular section; and the moving shaft extends along the axial direction of the tubular section and passes through the housing.

[0014] In one embodiment, the mover is made of permanent magnetic material, and the moving shaft is made of non-magnetic material.

[0015] In one embodiment, the support frame includes a winding portion and a fixing portion, wherein the tubular section passes through the winding portion and the fixing portion, the coil body is wound around the winding portion, and the fixing portion is connected to at least one end of the winding portion along the axial direction of the tubular section.

[0016] In one embodiment, the winding portion includes a winding tube and a partition plate, wherein the partition plate divides the winding tube into a plurality of winding areas along the axial direction of the tubular section.

[0017] In one embodiment, the fixing portion is provided with a boss extending along the axial direction of the tubular section in a first direction, and a groove extending along the axial direction of the tubular section in a second direction, and the first direction and the second direction are both orthogonal to the axial direction of the tubular section; the width of the boss in the second direction is equal to the width of the groove in the first direction.

[0018] In one embodiment, the electromagnetic actuator further includes a pin, the pin is inserted into the boss, and the coil body is energized through the pin.

[0019] According to the electromagnetic actuator of the embodiment of the present disclosure, when the coil body is energized in the forward direction, the moving part is subjected to an electromagnetic force directed from one end of the tubular section to the other end, and the moving part can move forward from one end of the tubular section to the other end; when the coil body is energized in the reverse direction, the moving part is subjected to an electromagnetic force directed from the other end of the tubular section to one end, and the moving part can move in the reverse direction from the other end of the tubular section to one end. In this way, the moving part is able to move back and forth in the tubular section, and is controlled by the electromagnetic force throughout the entire process of the back-and-forth movement, and parameters such as the movement speed can be adjusted. In addition, when the coil body is not energized, the moving part is not subjected to force and can remain stationary in the tubular section, thereby producing a hovering effect.

[0020] According to one embodiment of the present disclosure, a solenoid valve is provided, comprising the electromagnetic actuator described in any of the above embodiments, a piston, and a valve body. The valve body is provided with at least two valve ports, and the piston is connected to a moving member in the electromagnetic actuator. Thus, the moving member can drive the piston to adjust the opening size of at least one of the valve ports.

[0021] According to the above-mentioned solenoid valve of the embodiment of the present disclosure, it can stably adjust the opening size of the valve port by applying the electromagnetic actuator of any of the above-mentioned embodiments, thereby accurately controlling the flow rate of gas or liquid passing through the solenoid valve.

[0022] According to one embodiment of the present disclosure, a tactile display module is provided, comprising a plurality of electromagnetic actuators according to any one of the above embodiments and a main board, wherein the plurality of electromagnetic actuators are arrayed on the main board.

[0023] According to the tactile display module of the embodiment of the present disclosure, by applying the electromagnetic actuator of any of the above embodiments, a more accurate display effect can be achieved and expansion can be realized more conveniently.

[0024] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic structural diagram of an electromagnetic actuator according to an embodiment of the present disclosure.

[0026] FIG2 is a longitudinal cross-sectional view of an electromagnetic actuator according to an embodiment of the present disclosure.

[0027] FIG3 is a longitudinal cross-sectional view of an electromagnetic actuator according to another embodiment of the present disclosure.

[0028] FIG4 is a schematic structural diagram of a support frame according to an embodiment of the present disclosure.

[0029] FIG5 is a schematic structural diagram of the support frame shown in FIG4 from another perspective.

[0030] FIG6 is a schematic structural diagram of a support frame according to another embodiment of the present disclosure.

[0031] FIG7 is a schematic structural diagram showing an assembly of multiple electromagnetic actuators according to an embodiment of the present disclosure.

[0032] FIG8 is a schematic structural diagram showing an assembly of multiple electromagnetic actuators according to another embodiment of the present disclosure.

[0033] FIG9 is a longitudinal cross-sectional view of the electromagnetic actuator shown in FIG2 when the mover moves to the first magnetic induction element.

[0034] FIG10 is a longitudinal cross-sectional view of the electromagnetic actuator shown in FIG2 when the mover moves to the second magnetic induction element.

[0035] FIG11 is a schematic structural diagram of a first magnetic induction element according to an embodiment of the present disclosure.

[0036] FIG12 is a schematic structural diagram of a second magnetic induction element according to an embodiment of the present disclosure.

[0037] FIG13 is a schematic structural diagram of a cover according to an embodiment of the present disclosure.

[0038] 14a to 14c are schematic structural diagrams of a solenoid valve according to an embodiment of the present disclosure.

[0039] 15a and 15b are schematic structural diagrams of a solenoid valve according to another embodiment of the present disclosure.

[0040] FIG16 is a schematic structural diagram of a tactile display module according to an embodiment of the present disclosure.

[0041] FIG17 is a schematic structural diagram of a tactile display module according to another embodiment of the present disclosure.

[0042] FIG18 is a schematic structural diagram of a tactile display module according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and do not limit the scope of protection of the present disclosure.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0045] The electromagnetic actuator, electromagnetic valve and tactile display module disclosed herein are described in detail below with reference to the accompanying drawings. The features of the following embodiments and implementations may be combined with each other unless there is a conflict.

[0046] In one embodiment of the present disclosure, as shown in Figures 1 and 2, an electromagnetic actuator 100 is provided, including a shell 110, a support frame 120, a coil body 130 and a moving part 140. The support frame 120 is arranged in the shell 110, and is surrounded by the inner wall of the shell 110 to form a tubular section 12a. The coil body 130 is arranged around the support frame 120 along the axial direction of the tubular section 12a. At least part of the moving part 140 is arranged in the tubular section 12a, and reciprocates or remains stationary in the tubular section 12a. The coil body 130 is energized to generate a magnetic field, and the moving part 140 is subjected to an electromagnetic force in the magnetic field. Therefore, by changing the direction of the electromagnetic force by changing the energization direction of the coil body 130, the movement direction of the moving part 140 can be changed.

[0047] When the coil body 130 is energized in the forward direction, the moving member 140 is subjected to the electromagnetic force pointing to the other end from one end of the tubular section 12a, and the moving member 140 can move from one end of the tubular section 12a to the other end (also known as forward motion). When the coil body 130 is energized in the reverse direction, the moving member 140 is subjected to the electromagnetic force pointing to one end from the other end of the tubular section 12a, and the moving member 140 can move from the other end of the tubular section 12a to one end (also known as reverse motion). In this way, the moving member 140 is realized to move back and forth in the tubular section 12a, and is all controlled by the electromagnetic force throughout the whole process of the reciprocating motion, and parameters such as movement speed are regulated and controllable.

[0048] Furthermore, when the coil body 130 is not energized, the moving member 140 is not subjected to force and can remain stationary in the tubular section 12 a , thereby producing a hovering effect.

[0049] In some embodiments, efficient reciprocating motion response can be achieved by changing the direction of the electromagnetic force by changing the direction of the current flowing through the coil body 130 .

[0050] In some embodiments, the movement speed of the moving member 140 can be changed by adjusting the current flowing through the coil body 130 and changing the magnitude of the electromagnetic force in the magnetic field.

[0051] In some embodiments, when it is necessary to hover at a certain position, the energized current can be reduced in advance to reduce the movement speed of the moving member 140 until the moving member 140 hovers at the desired position. It can be understood that in this way, the moving member 140 can be hovered at any position in the tubular section 12a.

[0052] In other embodiments, there is friction between the moving member 140 and the housing 110 and / or the support frame 120. When the electromagnetic force and the friction force acting on the moving member 140 are equal, the moving member 140 can achieve hovering.

[0053] The above-mentioned hovering method has low energy consumption and high control accuracy, and can effectively solve the problems of electromagnetic actuators in related technologies such as easy heating, high energy consumption and poor accuracy.

[0054] Regarding the specific structure of the electromagnetic actuator 100, in some embodiments, with continued reference to Figures 1 and 2, the housing 110 includes a shell 111 and a cover 112. The shell 111 is hollow and has an opening. The cover 112 is sealed at the opening. The two are connected to form a closed chamber 113, so that the magnetic field lines generated by the coil body 130 due to power supply can be enclosed in the chamber 113. The shell 111 and the cover 112 can be fixedly connected by screws 170. In addition, as shown in Figure 13, a first assembly hole 1121 can be provided on the cover 112 for the screw 170 to pass through. The support frame 120, the coil body 130 and at least part of the moving part 140 are arranged in the chamber 113.

[0055] The shell 111 and the cover 112 can be made of industrial pure iron with an iron content greater than 99.8%, and are sprayed with paint for rust prevention.

[0056] In this embodiment, as shown in FIG2 , the electromagnetic actuator 100 further includes a sheath 180 that is disposed over the coil body 130. For example, the sheath 180 can be made of a PVC plastic film that is wrapped around the coil body 130 and tightly encapsulates the coil body 130 after heating. This effectively prevents short circuits between the coil body 130 and the enclosure 111.

[0057] In some embodiments, as shown in FIG2 , support frame 120 is tubular, and coil body 130 is wound around the outer surface of support frame 120. One end of support frame 120 abuts the inner surface of enclosure 111, while the other end of support frame 120 abuts the inner surface of cover 112. Thus, both ends of the space within the tube of support frame 120 are sealed by enclosure 110, thereby forming tubular section 12a.

[0058] In some embodiments, part of the moving member 140 is located in the tubular section 12 a , and part of the moving member 140 passes through the housing 110 . In this way, the electromagnetic actuator 100 can transmit motion to the outside.

[0059] Specifically, in this embodiment, as shown in FIG2 , the moving member 140 includes a mover 141 and a moving shaft 142 connected to the mover 141. The mover 141 is disposed within the tubular section 12 a and reciprocates or remains stationary within the tubular section 12 a. The moving shaft 142 extends in the axial direction of the tubular section 12 a and passes through the housing 110.

[0060] In some embodiments, as shown in Figure 2 , mover 141 is cylindrical and conforms to tubular section 12a for easy movement. The diameter of mover 141 is slightly larger than that of movable shaft 142. A through hole 114 is defined in housing 110 for movable shaft 142 to pass through. Furthermore, the diameter of through hole 114 is smaller than that of mover 141, ensuring that mover 141 remains within tubular section 12a.

[0061] In some embodiments, an oil seal is provided between the movable shaft 142 and the inner wall of the through hole 114. Appropriate friction may be provided between the movable shaft 142 and the inner wall of the through hole 114.

[0062] In this embodiment, the movable shaft 142 passes through the housing 110 at one location. In other embodiments, the movable shaft 142 passes through the housing 110 at two locations.

[0063] In some embodiments, the mover 141 is made of a permanent magnetic material, and the movable shaft 142 is made of a non-magnetic material. This way, only the mover 141 is subject to the electromagnetic force. The mover 141 is always located within the tubular section 12a, so that its volume within the tubular section 12a remains fixed. The movable shaft 142, on the other hand, continuously changes its length within the tubular section 12a as it moves, causing its volume within the tubular section 12a to continuously change. Therefore, using a permanent magnetic material as the motion source for the mover 141 facilitates calculation of the electromagnetic force acting on the mover 141 and facilitates the design of the mover 141's motion.

[0064] For example, the mover 141 can be made of Nd2Fe14B rare earth powder, which is a neodymium iron boron magnet with a brand number N35. The moving shaft 142 can be made of stainless steel, which can be 1Cr18Ni9Ti non-magnetic steel.

[0065] 3 , the electromagnetic actuator 100 may further include a magnetic induction element 160 disposed on the support frame 120 . The magnetic induction element 160 is disposed at the end of the tubular section 12 a . For example, the magnetic induction element 160 is inserted into the inner space of the support frame 120 from one end.

[0066] In this way, on the one hand, the magnetic induction element 160 can be magnetized by the magnetic field generated by the power supply of the coil body 130, and has magnetism, and generates an attractive force or a repulsive force between it and the mover 141 according to the different directions of the magnetic poles. For example, when the mover 141 moves to the magnetic induction element 160, if an attractive force is generated between the magnetic induction element 160 and the mover 141, so that the mover 141 and the magnetic induction element 160 are in close contact, the mover 141 can effectively hover there. If a repulsive force is generated between the magnetic induction element 160 and the mover 141, the magnetic induction element 160 can push the mover 141 out, thereby improving the operating efficiency of the electromagnetic actuator 100.

[0067] On the other hand, if the magnetic induction element 160 can attract the mover 141 when the coil body 130 is energized, when the mover 141 moves to the magnetic induction element 160, the coil body 130 can be de-energized so that the mover 141 is adsorbed on the magnetic induction element 160, achieving energy-free stopping.

[0068] In some embodiments, magnetic element 160 can be made of an iron-based amorphous alloy, resulting in a relatively narrow BH loop, high magnetic permeability, and low loss. Its resistivity is 2-3 times higher than that of crystalline alloys, which also helps reduce eddy current losses. Magnetic element 160 can also be made of materials such as industrial pure iron with an iron content greater than 99.8%. Industrial pure iron with an iron content greater than 99.8% can be painted to prevent rust.

[0069] In some embodiments, referring to Figures 4 to 6, the support frame 120 includes a winding portion 121 and a fixing portion 122, the tubular section 12a is passed through the winding portion 121 and the fixing portion 122, the coil body 130 is wound around the winding portion 121, and the fixing portion 122 is provided at at least one end of the winding portion 121 along the axial direction z of the tubular section 12a.

[0070] The tubular section 12a extends throughout the support frame 120, thereby providing more space. The winding portion 121 and the fixing portion 122 are connected along the axial direction z of the tubular section 12a. In the embodiments shown in Figures 4 to 6, the support frame 120 includes the winding portion 121 and a fixing portion 122 disposed at one end of the winding portion 121. In other embodiments, the support frame 120 may include the winding portion 121 and two fixing portions 122 disposed at both ends of the winding portion 121.

[0071] In the embodiment shown in Figures 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 protrusion 123 for retaining the coil body 130. The tubular section 12a also extends through the annular protrusion 123. Furthermore, the outer diameter of the annular protrusion 123 can be set to be equal to the inner diameter of the enclosure 111, so that the annular protrusion 123 abuts the inner wall of the enclosure 111 in the radial direction of the tubular section 12a, thereby securing the support frame 120.

[0072] Furthermore, in some embodiments, as shown in Figures 4 to 6 , the winding portion 121 includes a winding tube 1211 and a partition plate 1212. The partition plate 1212 is used to separate the winding tube 1211 into multiple winding areas 12121 along the axial direction z of the tubular section 12a. Dividing the longer winding tube 1211 into multiple shorter winding areas 12121 can ensure more uniform winding of the coil body 130.

[0073] In some embodiments, the separator plate 1212 is provided with wire grooves 12122 for the coil bodies 130 to pass through, thereby connecting the coil bodies 130 in different winding areas 12121. Specifically, the separator plate 1212 may be provided with multiple wire grooves 12122. In the embodiment shown in Figures 4 to 6, four wire grooves 12122 are arranged in an array along the circumference of the annular separator plate 1212.

[0074] In some embodiments, the coil body 130 is a single coil winding, which is disposed in different winding areas 12121 . In other embodiments, the coil body 130 includes multiple coil windings, with one coil winding correspondingly disposed in one or more winding areas 12121 .

[0075] In some embodiments, as shown in Figures 4 to 6 , the fixing portion 122 is provided with a boss 1221 extending in the first direction x along the axial direction z of the tubular segment 12a, and a groove 1222 extending in the second direction y along the axial direction z of the tubular segment 12a. Both the first direction x and the second direction y are orthogonal to the axial direction z of the tubular segment 12a. The width of the boss 1221 in the second direction y is equal to the width of the groove 1222 in the first direction x. In this manner, the boss 1221 can be inserted into the groove 1222 along the axial direction z of the tubular segment 12a. As shown in Figures 7 and 8 , when multiple electromagnetic actuators 100 are used, they can be assembled in this manner.

[0076] 4 to 6 , the fixing portion 122 includes a protruding section 1223 with a groove 1222 formed between the two protruding sections 1223. The boss 1221 is flush with the protruding section 1223 at one end near the bobbin 1211 in the axial direction z of the tubular section 12a and extends beyond the protruding section 1223 at the other end.

[0077] In some embodiments, a wire groove 1224 is formed between the boss 1221 and the protruding section 1223 , through which the coil body 130 can pass.

[0078] The support frame 120 can be made of glass fiber reinforced nylon and injection molded using a precision mold.

[0079] Further, referring to Figures 3 to 6, the electromagnetic actuator 100 also includes a pin 150, which is inserted into the boss 1221, and the coil body 130 is energized through the pin 150. Specifically, the coil body 130 is welded to the pin 150. As shown in Figures 5 and 6, the boss 1221 is provided with a hole 12211 for the pin 150 to pass through. In this embodiment, the pin 150 passes through the boss 1221, passes through the cover 112 and extends to the outside of the electromagnetic actuator 100. Correspondingly, as shown in Figure 13, a second assembly hole 1122 is provided on the cover 112 for the pin 150 to pass through. In some embodiments, as shown in Figure 5, the electromagnetic actuator 100 is provided with a pair of holes 12211 for passing a pair of pins 150 to energize a coil winding. In other embodiments, in the electromagnetic actuator 100, the boss 1221 of the fixed portion 122 of the support frame 120 may be provided with multiple pairs of holes 12211 for receiving multiple pairs of pins 150 to energize different coil windings. For example, as shown in FIG6 , in the electromagnetic actuator 100, the boss 1221 of the fixed portion 122 of the support frame 120 is provided with two pairs of holes 12211 for receiving two pairs of pins 150 to energize two sets of coil windings.

[0080] In some embodiments, as shown in Figure 3, the magnetic induction element 160 includes a first magnetic induction element 161 and a second magnetic induction element 162. The first magnetic induction element 161 is provided at one end of the tubular section 12a, and the second magnetic induction element 162 is provided at the other end of the tubular section 12a. The moving member 140 reciprocates or remains stationary between the first magnetic induction element 161 and the second magnetic induction element 162. The first magnetic induction element 161 and the second magnetic induction element 162 are respectively provided at both ends of the tubular section 12a, and the stroke of the moving member 140 is provided between the first magnetic induction element 161 and the second magnetic induction element 162, so that the reciprocating motion of the moving member 140 has a clear starting point and end point. When the moving member 140 moves to a position close to one of the first magnetic induction element 161 and the second magnetic induction element 162, it can be adsorbed and stopped in a short time. As shown in FIG. 9 , the mover 141 in the moving member 140 moves to the first magnetic induction member 161 and stops; or, as shown in FIG. 10 , the mover 141 in the moving member 140 moves to the second magnetic induction member 162 and stops.

[0081] Specifically, in this embodiment, referring to Figures 3 to 6, 11 and 12, the first magnetic induction member 161 includes a positioning portion 1611 and an insertion portion 1612, the positioning portion 1611 is clamped between the shell 111 and the annular protrusion 123, and the insertion portion 1612 is inserted into the support frame 120. The moving shaft 142 in the moving member 140 passes through the first magnetic induction member 161 and the shell 111. Friction force can also be set between the moving shaft 142 and the first magnetic induction member 161. The second magnetic induction member 162 is inserted into the fixed portion 122 of the support frame 120. The mover 141 in the moving member 140 reciprocates between the first magnetic induction member 161 and the second magnetic induction member 162 or remains stationary.

[0082] 9 and 10 , the radial projection of the travel section between the first magnetic induction element 161 and the second magnetic induction element 162 along the tubular section 12a lies within the winding interval of the coil body 130. This ensures that the mover 141 in the moving element 140 is always within the effective magnetic field generated by the coil body 130, facilitating calculation of the electromagnetic force.

[0083] In some embodiments, the winding direction of the coil body 130 at the first magnetic induction element 161 is the same as the winding direction at the second magnetic induction element 162. Thus, after the coil body 130 is energized, the vector directions of the magnetic field strengths of the magnetized first magnetic induction element 161 and the second magnetic induction element 162 are the same. Specifically, in some embodiments, the winding portion 121 is provided with a partition plate 1212, which divides the winding tube 1211 into two winding areas 12121 along the axial direction of the tubular section 12a, wherein one winding area 12121 is arranged close to the first magnetic induction element 161 in the axial direction of the tubular section 12a, and the other winding area 12121 is arranged close to the second magnetic induction element 162 in the axial direction of the tubular section 12a. The winding direction of the coil body 130 in the two winding areas 12121 is the same, for example, both are wound in the forward direction.

[0084] In other embodiments, the winding direction of the coil body 130 at the first magnetic induction element 161 is opposite to that at the second magnetic induction element 162. Thus, after the coil body 130 is energized, the vector directions of the magnetic field strengths of the magnetized first magnetic induction element 161 and the second magnetic induction element 162 are opposite. Specifically, in some embodiments, the winding portion 121 is provided with a partition plate 1212, which divides the winding tube 1211 into two winding areas 12121 along the axial direction of the tubular section 12a, wherein one winding area 12121 is arranged close to the first magnetic induction element 161 in the axial direction of the tubular section 12a, and the other winding area 12121 is arranged close to the second magnetic induction element 162 in the axial direction of the tubular section 12a. The winding directions of the coil body 130 in the two winding areas 12121 are opposite. For example, the coil body 130 wound close to the first magnetic induction element 161 is wound in the forward direction, and the coil body 130 wound close to the second magnetic induction element 162 is wound in the reverse direction.

[0085] In this embodiment, the coil body 130 is a single coil winding, or multiple coil windings with the same current supply direction. The coil body 130 simultaneously controls the first magnetic induction element 161 and the second magnetic induction element 162, so that the polarity directions of the first magnetic induction element 161 and the second magnetic induction element 162 are the same or opposite. Taking the electromagnetic actuator 100 in Figure 3 as an example, when the winding direction of the coil body 130 at the first magnetic induction element 161 is the same as the winding direction at the second magnetic induction element 162, after the coil body 130 is energized, in the direction of the paper, the upper end of the first magnetic induction element 161 is the north pole and the lower end is the south pole, and the second magnetic induction element 162 also has the north pole at the upper end and the south pole at the lower end. When the winding direction of the coil body 130 at the first magnetic induction element 161 is opposite to the winding direction at the second magnetic induction element 162, after the coil body 130 is energized, in the direction of the paper, the upper end of the first magnetic induction element 161 is the N pole and the lower end is the S pole, while the upper end of the second magnetic induction element 162 is the S pole and the lower end is the N pole.

[0086] In some embodiments, the moving member 140 is subjected to an electromagnetic force in the magnetic field generated by the energized coil body 130, the first magnetic induction member 161, and the second magnetic induction member 162. Specifically, in some embodiments, when the coil body 130 is energized, the moving member 140 is subjected to a first electromagnetic force generated by the magnetized first magnetic induction member 161, a second electromagnetic force generated by the magnetized second magnetic induction member 162, and a third electromagnetic force from the energized coil body 130. Taking the electromagnetic actuator 100 in FIG3 as an example, when the coil bodies 130 wound in the same direction are energized, in the direction of the paper, the upper end of the first magnetic induction member 161 is an N pole and the lower end is an S pole, the upper end of the second magnetic induction member 162 is an N pole and the lower end is an S pole, and the upper end of the mover 141 itself is an N pole and the lower end is an S pole. At this time, the upper end of the mover 141 is subjected to the first electromagnetic force applied upward by the first magnetic induction member 161, and the lower end of the mover 141 is subjected to the second electromagnetic force applied downward by the second magnetic induction member 162. The mover 141 is also subject to a third, upward electromagnetic force from the coil body 130. When the coil body 130 is energized, the upper end of the mover 141 is also subject to a first, upward permanent magnetic force from the first magnetic induction element 161, and the lower end of the mover 141 is also subject to a second, downward permanent magnetic force from the second magnetic induction element 162. Furthermore, the mover 141 is subject to gravity and friction. These seven forces act together to cause the mover 141 to move or remain stationary.

[0087] 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 corresponding power supply direction and power supply current of the coil body 130. By controlling the power supply direction of the coil body 130, the vector direction of the magnetic field strength of the first magnetic induction element 161 and the second magnetic induction element 162 can be changed, that is, the direction of the first electromagnetic force and the second electromagnetic force can be changed. Taking the electromagnetic actuator 100 in Figure 3 as an example, when the coil body 130 is powered in the forward direction, in the direction of the paper, the upper end of the first magnetic induction element 161 is the N pole and the lower end is the S pole, and the upper end of the second magnetic induction element 162 is the N pole and the lower end is the S pole. When the coil body 130 is powered in the reverse direction, in the direction of the paper, the upper end of the first magnetic induction element 161 is the S pole and the lower end is the N pole, and the upper end of the second magnetic induction element 162 is the S pole and the lower end is the N pole. By controlling the magnitude of the current flowing through the coil body 130 , the magnitudes of the first electromagnetic force and the second electromagnetic force can be changed, thereby controlling the movement of the mover 141 .

[0088] In other embodiments, as shown in FIG3 , the coil body 130 includes a first coil winding 131 and a second coil winding 132. When energized, the first coil winding 131 magnetizes the first magnetic induction element 161, and when energized, the second coil winding 132 magnetizes the second magnetic induction element 162. By controlling the direction of energization of the first coil winding 131 and the second coil winding 132, the vector directions of the magnetic field intensities of the first magnetic induction element 161 and the second magnetic induction element 162 can be made identical or opposite. In other words, because the first coil winding 131 and the second coil winding 132 respectively control the first magnetic induction element 161 and the second magnetic induction element 162, the polarity directions of the first magnetic induction element 161 and the second magnetic induction element 162 can be flexibly controlled to be identical or different. Taking the electromagnetic actuator 100 in Figure 3 as an example, if the first coil winding 131 is energized in the forward direction and the second coil winding 132 is energized in the forward direction, then, in the direction of the paper, the upper end of the first magnetic induction element 161 is the north pole and the lower end is the south pole, and the second magnetic induction element 162 also has the upper end of the north pole and the lower end is the south pole. Furthermore, if the first coil winding 131 is energized in the forward direction and the second coil winding 132 is energized in the reverse direction, then, in the direction of the paper, the upper end of the first magnetic induction element 161 is the north pole and the lower end is the south pole, and the upper end of the second magnetic induction element 162 is the south pole and the lower end is the north pole.

[0089] In some embodiments, the moving member 140 is subjected to a first electromagnetic force in the magnetic field generated by the energized first coil winding 131 and the magnetized first magnetic induction member 161. Specifically, in some embodiments, when the first coil winding 131 is energized, the moving member 140 is subjected to the first magnetic induction electromagnetic force generated by the magnetized first magnetic induction member 161, and the moving member 140 is subjected to the first winding electromagnetic force generated by the first coil winding 131.

[0090] In some embodiments, the moving member 140 is subjected to a second electromagnetic force in the magnetic field generated by the energized second coil winding 132 and the magnetized second magnetic induction member 162. Specifically, in some embodiments, when the second coil winding 132 is energized, the moving member 140 is subjected to the second magnetic induction electromagnetic force generated by the magnetized second magnetic induction member 162, and the moving member 140 is subjected to the second winding electromagnetic force generated by the second coil winding 132.

[0091] Taking the electromagnetic actuator 100 in Figure 3 as an example, if the first coil winding 131 is energized in the forward direction and the second coil winding 132 is energized in the reverse direction, then in the direction of the paper, the upper end of the first magnetic induction element 161 is the north pole and the lower end is the south pole, the upper end of the second magnetic induction element 162 is the south pole and the lower end is the north pole, and the upper end of the mover 141 itself is the north pole and the lower end is the south pole. At this time, the mover 141 is subjected to the upward first electromagnetic force, the upper end of the mover 141 is subjected to the upward first magnetic induction electromagnetic force from the first magnetic induction element 161 and the upward first winding electromagnetic force from the first coil winding 131, and the lower end of the mover 141 is subjected to the upward second magnetic induction electromagnetic force from the second magnetic induction element 162 and the downward second electromagnetic force from the second coil winding 132. The upper end of mover 141 is also subject to a first, upward permanent magnetic force from first magnetic element 161, while the lower end of mover 141 is also subject to a second, downward permanent magnetic force from second magnetic element 162. Furthermore, mover 141 is also subject to gravity and friction. These eight forces act together to cause mover 141 to move or remain stationary.

[0092] In some embodiments, the magnetic field strength of the first magnetic induction element 161 is controlled by selecting the power-on direction and the power-on current of the corresponding first coil winding 131. In some embodiments, the magnetic field strength of the second magnetic induction element 162 is controlled by selecting the power-on direction and the power-on current of the corresponding second coil winding 132. By controlling the power-on direction of the first coil winding 131 and the second coil winding 132, the vector direction of the magnetic field strength of the first magnetic induction element 161 and the second magnetic induction element 162 can be changed, that is, the direction of the first permanent magnetic force and the second permanent magnetic force can be changed, and the direction of the first electromagnetic force and the second electromagnetic force can also be changed. By controlling the power-on current of the first coil winding 131 and the second coil winding 132, the magnitude of the first electromagnetic force and the second electromagnetic force can be changed, thereby controlling the movement of the mover 141.

[0093] In some embodiments, when the coil body 130 is not powered, the moving element 140 is subjected to the first permanent magnetic force from the first magnetic element 161. Thus, when the mover 141 reaches the first magnetic element 161, the coil body 130 can be powered off, and the mover 141 can be attracted to the first magnetic element 161 by the first permanent magnetic force, achieving a zero-energy stop.

[0094] In some embodiments, when the coil body 130 is not powered, the moving element 140 may be subjected to a second permanent magnetic force from the second magnetic induction element 162. Thus, when the mover 141 reaches the second magnetic induction element 162, the coil body 130 may be powered off, and the mover 141 may be attracted to the second magnetic induction element 162 by the second permanent magnetic force, achieving an energy-free stop.

[0095] In one embodiment of the present disclosure, as shown in Figures 14a to 14c, Figure 15a and Figure 15b, a solenoid valve 200 is further provided, comprising an electromagnetic actuator 100, a piston 210 and a valve body 220 as in any of the above embodiments. The valve body 220 is provided with at least two valve ports 221, and the piston 210 is connected to the moving part 140 of the electromagnetic actuator 100. The moving part 140 drives the piston 210 to move, so that the piston 210 adjusts the opening size of at least one of the valve ports 221. Applying the electromagnetic actuator 100 in the present disclosure to the solenoid valve can stably adjust the opening size of the valve port 221, thereby accurately regulating the flow rate of gas or liquid passing through the solenoid valve 200.

[0096] Specifically, in the embodiment shown in Figures 14a to 14c, the solenoid valve 200 has two valve ports, namely valve port 221a and valve port 221b, and the piston 210 adjusts the opening size of valve port 221a. The process shown in Figures 14a to 14c shows that the moving member 140 drives the piston 210 to move, gradually enlarging the valve port 221a, thereby gradually increasing the flow rate of gas or liquid through the solenoid valve 200.

[0097] In the embodiment shown in Figure 15 a and Figure 15 b, electromagnetic valve 200 is provided with three valve ports, are respectively valve port 221c, valve port 221d and valve port 221e, and piston 210 regulates the opening size of valve port 221c and valve port 221d.As shown in Figure 15 a, moving member 140 drives piston 210 to move to valve port 221d, and valve port 221d closes, and gas or liquid flows into from valve port 221c and flows out from valve port 221e.As shown in Figure 15 b, moving member 140 drives piston 210 to move to valve port 221c, and valve port 221c closes, and gas or liquid flows into from valve port 221d and flows out from valve port 221e.

[0098] In one embodiment of the present disclosure, as shown in Figures 16 to 18 , a tactile display module 300 is provided, comprising a plurality of electromagnetic actuators 100 according to any of the above embodiments and a mainboard 310, wherein the plurality of electromagnetic actuators 100 are arranged in an array on the mainboard 310. Applying the electromagnetic actuators 100 of the present disclosure to the tactile display module 300 can achieve a more accurate display effect and more convenient expansion.

[0099] The plurality of electromagnetic actuators 100 are electrically connected to the main board 310 , and each electromagnetic actuator 100 is controlled individually.

[0100] The tactile display module 300 can be a Braille display module. The embodiment shown in Figure 16 is a six-contact Braille display module, with six electromagnetic actuators 100 arranged and assembled according to the size of the Braille dots. The embodiment shown in Figure 17 is an eight-contact Braille display module, with eight electromagnetic actuators 100 arranged and assembled according to the size of the Braille dots. The module is equipped with a driver circuit board and control interface, enabling independent and precise control of each Braille dot.

[0101] The tactile display module 300 can also be a dot matrix image display module. The embodiment shown in FIG18 is a dot matrix image display module with 25 contacts. Twenty-five electromagnetic actuators 100 are arranged in five rows and five columns, equidistant from each other. A mainboard 310 is a driver circuit board, and a USB-C control interface 311 is provided on the mainboard 310, enabling independent and precise control of each contact.

[0102] In the description of the present disclosure, it should be understood that the terms "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0103] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first," "second," etc., may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0104] In this disclosure, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0105] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0106] It should be noted that when an element is referred to as being "fixed to," "disposed on," "fixed on," or "installed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. Furthermore, when an element is considered to be "fixedly connected" to another element, the two may be fixed in a detachable connection manner or in a non-detachable connection manner, such as socketing, snap-fitting, integral molding, welding, etc., which can be achieved in traditional technologies and will not be elaborated here.

[0107] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The above embodiments merely illustrate several implementations of the present disclosure, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the inventive concept of the present disclosure, and all such variations and improvements fall within the scope of protection of the present disclosure.

Claims

1. An electromagnetic actuator, comprising: case; A support frame is disposed in the shell and is surrounded by an inner wall of the shell to form a tubular section; A coil body is arranged around the support frame along the axial direction of the tubular section; and a moving member, at least partially disposed in the tubular section, and reciprocating or remaining stationary in the tubular section, The coil body generates a magnetic field when energized, and the moving part is subjected to an electromagnetic force in the magnetic field. The direction of the electromagnetic force is changed by changing the energization direction of the coil body to change the movement direction of the moving part. 2 . The electromagnetic actuator as claimed in claim 1 , further comprising a magnetic induction element arranged on the support frame, wherein the magnetic induction element is arranged at an end of the tubular section.

3. The electromagnetic actuator according to claim 2, characterized in that The magnetic induction element comprises: a first magnetic induction member, disposed at one end of the tubular section, and A second magnetic sensing element is disposed at the other end of the tubular section; The moving element reciprocates between the first magnetic induction element and the second magnetic induction element or remains stationary.

4. The electromagnetic actuator according to claim 3, characterized in that A projection of a travel section between the first magnetic induction element and the second magnetic induction element along a radial direction of the tubular section is located within a winding interval of the coil body.

5. The electromagnetic actuator according to claim 3, characterized in that: The coil body comprises: a first coil winding, which magnetizes the first magnetic induction element after being energized, and The second coil winding magnetizes the second magnetic induction element after being energized. 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.

6. The electromagnetic actuator according to claim 5, characterized in that The moving member is subjected to one or more of the following forces: When the first coil winding is energized, a first electromagnetic force is applied to the first coil winding in a magnetic field generated by the first coil winding and the first magnetic induction element; a first permanent magnetic force from the first magnetic induction element; When the second coil winding is energized, a second electromagnetic force is applied to the second coil winding in the magnetic field generated by the second coil winding and the second magnetic induction member; or a second permanent magnetic force from the second magnetic induction element; The magnetic field strength of the first magnetic induction element is controlled by selecting the corresponding energizing direction and energizing current of the first coil winding; The magnetic field strength of the second magnetic induction element is controlled by selecting the corresponding energizing direction and energizing current of the second coil winding.

7. The electromagnetic actuator according to claim 3, characterized in that: The winding direction of the coil body at the first magnetic induction element is the same as the winding direction at the second magnetic induction element. After the ring body is energized, the first magnetic induction element and the second magnetic induction element are magnetized, and 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 coil body at the first magnetic induction element is opposite to that at the second magnetic induction element. After the coil body is energized, the first magnetic induction element and the second magnetic induction element are magnetized, and the vector directions of the magnetic field strengths of the first magnetic induction element and the second magnetic induction element are opposite.

8. The electromagnetic actuator according to claim 7, characterized in that The moving member is subjected to at least one of the following forces: When the coil body is energized, the electromagnetic force received in the magnetic field generated by the coil body, the first magnetic induction element and the second magnetic induction element; a first permanent magnetic force from the first magnetic induction element; or a second permanent magnetic force from the second magnetic induction element; 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 corresponding energizing direction and energizing current of the coil body.

9. The electromagnetic actuator according to any one of claims 1 to 8, characterized in that: The moving part comprises: a mover, disposed in the tubular section, and reciprocating or remaining stationary in the tubular section; and A moving shaft connected to the mover extends along the axial direction of the tubular section and passes through the housing.

10. The electromagnetic actuator according to claim 9, characterized in that The mover is made of permanent magnetic material. The moving shaft is made of non-magnetic material.

11. The electromagnetic actuator according to claim 1, characterized in that The support frame comprises: a winding portion, the coil body being wound around the winding portion; and a fixing portion connected to at least one end of the winding portion in the axial direction of the tubular section, The tubular section passes through the winding portion and the fixing portion.

12. The electromagnetic actuator according to claim 11, characterized in that The winding part includes a winding tube and a partition plate. The partition plate divides the winding tube into a plurality of winding areas along the axial direction of the tubular section.

13. The electromagnetic actuator according to claim 11, characterized in that The fixing portion is provided with a boss extending in the axial direction of the tubular section in a first direction. The fixing portion is provided with a groove extending in the axial direction of the tubular section in the second direction. The first direction and the second direction are both orthogonal to the axial direction of the tubular section; The width of the boss in the second direction is equal to the width of the groove in the first direction.

14. The electromagnetic actuator according to claim 13, characterized in that The electromagnetic actuator further comprises a pin which is inserted into the boss, and the coil body is energized through the pin.

15. A solenoid valve, comprising: A valve body having at least two valve ports; piston; and The electromagnetic actuator according to any one of claims 1 to 14, Wherein, the moving part of the electromagnetic actuator is connected to the piston, and the moving part drives the piston to move, so that the piston adjusts the opening size of at least one of the valve ports.

16. A tactile display module, comprising: A plurality of electromagnetic actuators according to any one of claims 1 to 14; and A main board, wherein the plurality of electromagnetic actuators are arrayed on the main board.

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