Magnetic path part with enhanced initial electromagnetic attraction force and high-voltage DC relay

Abstract

To provide a magnetic path part having an enhanced initial electromagnetic attraction force.SOLUTION: A magnetic path part of the present invention includes a coil, a movable magnetizer and a static magnetizer. The coil, the movable magnetizer and the static magnetizer are installed at the matched positions respectively, so that the magnetic pole face of the movable magnetizer and the magnetic pole face of the static magnetizer are located at the opposite positions with a predetermined magnetic gap. One of the two magnetic pole faces is provided with a protruding part protruding towards the direction of the other magnetic pole face, and the other magnetic pole face is provided with a recessed part capable of enabling the protruding part of one magnetic pole face to be embedded when the movable magnetizer and the static magnetizer attract each other, at a position corresponding to the protruding part. The present invention can achieve an enhanced initial electromagnetic attraction force with an equivalent coil volume and power consumption, or can achieve a reduced coil volume and a reduced coil power consumption with an equivalent initial electromagnetic attraction force.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] [Cross-Citation of Related Applications] This invention claims priority to Chinese patent applications filed on July 9, 2021, with application numbers 202110779803.1, 202110780418.9 and 202121565706.4, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the field of relay technology, and more particularly to a magnetic path portion that enhances initial electromagnetic attraction and a high voltage DC relay. [Background technology]

[0003] A relay is an electronic control device that has a control system (also called the input circuit) and a controlled system (also called the output circuit), and is usually used in automatic control circuits. In reality, it is an automatic switch that controls large currents with small currents, and therefore plays roles such as automatic adjustment, safety protection, and conversion circuitry in electrical circuits. High-voltage DC relays are relays that can handle high power, and are characterized by their reliability and long service life that are incomparable to conventional relays, even under harsh conditions such as high voltage and large current, and are widely used in various fields such as new energy automobiles.

[0004] Meanwhile, as the range requirements for new energy vehicles increase, battery capacities become higher, and short-circuit currents when the battery pack is short-circuited also become higher, which requires high-voltage DC relays to have strong short-circuit resistance. Meanwhile, high-voltage DC relays are also required to consume less power and reduce energy loss. As the passenger space requirements for new energy vehicles become larger, the volume requirements for high-voltage DC relays become smaller. Generally speaking, high-voltage DC relays applied in fields such as new energy vehicles are required to have strong electromagnetic attraction, low driving power consumption, and small volume. However, in the prior art, the strong electromagnetic attraction required for short-circuit resistance requires the relay to have large coil winding space and coil driving power consumption, which contradicts the small volume and low power consumption of the high-voltage DC relay, affecting the application of the prior art high-voltage DC relays in fields such as new energy vehicles. Summary of the Invention

[0005] The object of the present invention is to overcome the shortcomings of the prior art and to provide a magnetic path portion and a high-voltage DC relay that increase the initial electromagnetic attractive force. By improving the structure, it is possible to increase the initial electromagnetic attractive force with the same coil volume and power consumption, or to reduce the coil volume and power consumption while maintaining the same initial electromagnetic attractive force.

[0006] The technical solution to solve the technical problem of the present invention provides a magnetic path part that strengthens the initial electromagnetic attraction force, and includes a coil, a movable magnetic body, a return spring, and a stationary magnetic body, the coil, the movable magnetic body, and the stationary magnetic body are respectively mounted in suitable positions, so that the magnetic pole face of the movable magnetic body and the magnetic pole face of the stationary magnetic body are positioned opposite each other with a predetermined magnetic gap, and when the coil is energized, the movable magnetic body moves toward the stationary magnetic body, the return spring is provided between the center of the movable magnetic body and the center of the stationary magnetic body, and the two corresponding magnetic pole faces are annular, and One magnetic pole face has a convex portion that protrudes in the direction of the other magnetic pole face, and the other magnetic pole face has a concave portion at a position corresponding to the convex portion, into which the movable magnetic body and the stationary magnetic body are attracted to each other, and a certain distance is provided from the convex portion and the concave portion to the annular inner and outer rings of the corresponding magnetic pole face, and when current is passed through a coil between the convex portion and the concave portion, the resultant force direction of the attractive forces on both sides generated in the longitudinal cross section where the convex portion meets the concave portion is always along the direction of movement of the movable magnetic body toward the stationary magnetic body, and by using the convex portion to reduce the magnetic gap between the two magnetic pole faces at the convex portion position, the magnetic resistance is reduced and the initial electromagnetic attractive force is increased.

[0007] According to one embodiment of the present invention, the upper surface of the convex portion is flat, and when the convex portion is fully inserted into the concave portion, the gaps between all side surfaces of the convex portion and the corresponding side walls of the concave portion are exactly the same, so that the direction of the resultant attractive force generated when a coil is energized between the convex portion and the concave portion is always along the direction of movement of the movable magnetic body toward the stationary magnetic body. According to one embodiment of the present invention, the distance from the side edge of the upper surface of the protrusion to the side edge of the corresponding opening of the recess is smaller than the predetermined magnetic gap between the two magnetic pole faces. According to one embodiment of the present invention, when the convex portion is fully inserted into the concave portion, the gap between the side surface of the convex portion and the side wall of the concave portion is greater than or equal to the distance from the top surface of the convex portion to the bottom surface of the concave portion, and the distance from the top surface of the convex portion to the bottom surface of the concave portion is greater than or equal to the distance between two magnetic pole faces.

[0008] According to one embodiment of the present invention, the side surface of the convex portion is one or a combination of two or more of a vertical surface, an inclined surface, and a curved surface, and the side surfaces of both sides of the convex portion have a symmetrical structure in a longitudinal section.

[0009] According to one embodiment of the present invention, the one pole face has one or more convex portions, and the other pole face has one or more concave portions at corresponding positions.

[0010] According to one embodiment of the present invention, the protrusion is a separate component and is fixed to the pole face.

[0011] According to one embodiment of the present invention, the protrusion is an integral structure molded onto the pole face.

[0012] According to one embodiment of the present invention, the convex portion has a convex shaft shape.

[0013] According to one embodiment of the present invention, the protrusions are stripe-shaped.

[0014] According to one embodiment of the present invention, the convex portion is linear, arcuate, or annular.

[0015] According to one embodiment of the present invention, the sum of the areas of the top surfaces of all the protrusions on the pole face is smaller than the area remaining after removing all the protrusions on the pole face.

[0016] According to one embodiment of the present invention, the one pole face is provided on a movable magnetic conductive body, and the other pole face is provided on a stationary magnetic conductive body.

[0017] According to one embodiment of the present invention, the movable magnetic conductive body is a movable iron core, and the stationary magnetic conductive body is a fixed iron core or a yoke plate.

[0018] Another aspect of the present invention provides a high voltage DC relay including a magnetic path portion that enhances the initial electromagnetic attraction force.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] In the present invention, one of the two magnetic pole faces is provided with a protrusion that protrudes toward the other magnetic pole face, and the other magnetic pole face is provided with a recess at a position corresponding to the protrusion, into which the movable magnetic body and the stationary magnetic body are attracted to each other and the protrusion can be fitted. The resultant force of attraction generated between the protrusion and the recess when a coil is energized is always directed along the direction in which the movable magnetic body moves toward the stationary magnetic body, resulting in a greater attraction force. This configuration of the present invention utilizes the protrusion on one of the two magnetic pole faces to reduce the magnetic gap between the two magnetic pole faces at the protrusion position, thereby reducing magnetic reluctance and increasing the initial electromagnetic attraction force, or, with the same initial electromagnetic attraction force, reducing the coil volume and reducing coil power consumption. In the present invention, the recess on the other magnetic pole face cooperates with the protrusion on one magnetic pole face to ensure attraction at a predetermined position between the two magnetic pole faces.

[0021] The present invention will be described in more detail below with reference to the accompanying drawings and examples, but the magnetic path portion and high voltage DC relay that enhance the initial electromagnetic attraction force of the present invention are not limited to the examples. [Brief explanation of the drawings]

[0022] These and other features and advantages of the present invention will become more apparent from the detailed description of illustrative embodiments thereof, taken in conjunction with the drawings. [Figure 1] FIG. 2 is an exploded perspective view of a first embodiment of a magnetic path portion in which an initial electromagnetic attractive force is increased according to the present invention; [Figure 2]FIG. 2 is a cross-sectional view of the magnetic path portion shown in FIG. 1 (before current is applied to the coil); [Figure 3] FIG. 3 is an enlarged view of a portion A in FIG. 2. [Figure 4] 2 is a cross-sectional view of the magnetic path portion shown in FIG. 1 (in a state where the movable core has moved to a predetermined position after current is passed through the coil). [Figure 5] FIG. 5 is an enlarged view of a portion B in FIG. [Figure 6] 2 is a cross-sectional view of a movable core in a magnetic path portion shown in FIG. 1. [Figure 7] 2 is a schematic diagram showing the relationship between the magnetic gap and the attractive force / reactive force in the magnetic path portion shown in FIG. 1. [Figure 8] FIG. 10 is a cross-sectional view of a movable core according to a second embodiment of the present invention, showing a magnetic path portion in which the initial electromagnetic attraction force is increased. [Figure 9] FIG. 10 is a perspective view of a movable core of a third embodiment of the magnetic path portion of the present invention in which the initial electromagnetic attraction force is increased. [Figure 10] FIG. 10 is a perspective view of a movable core according to a fourth embodiment of the present invention, showing a magnetic path portion where the initial electromagnetic attraction force is increased. [Figure 11] FIG. 10 is a perspective view of a movable core according to a fifth embodiment of the present invention, showing a magnetic path portion where the initial electromagnetic attraction force is increased. [Figure 12] FIG. 12 is a cross-sectional view of FIG. [Figure 13] FIG. 10 is a perspective view of a movable core of a sixth embodiment of the magnetic path portion of the present invention in which the initial electromagnetic attraction force is increased. [Figure 14] FIG. 10 is a cross-sectional view of a movable core according to a seventh embodiment of the present invention, showing a magnetic path portion in which the initial electromagnetic attraction force is increased. [Figure 15] FIG. 10 is a perspective view of a movable core according to an eighth embodiment of the present invention, which is a magnetic path portion where the initial electromagnetic attraction force is increased. [Figure 16] FIG. 13 is an exploded perspective view of a ninth embodiment of the magnetic path portion of the present invention in which the initial electromagnetic attraction force is increased. [Figure 17] FIG. 17 is a cross-sectional view of FIG. 16 (before current is applied to the coil). [Figure 18] FIG. 10 is an exploded perspective view of a tenth embodiment of a magnetic path portion in which the initial electromagnetic attractive force is increased according to the present invention. [Figure 19] FIG. 19 is a cross-sectional view of FIG. 18 (before current is applied to the coil). [Figure 20] FIG. 13 is an exploded perspective view of an eleventh embodiment of a magnetic path portion in which the initial electromagnetic attraction force is increased according to the present invention. [Figure 21] FIG. 21 is a cross-sectional view of FIG. 20 (before current is applied to the coil). [Figure 22] 3 is a cross-sectional view of a movable core of an embodiment of a direct-acting magnetic path portion of the present invention. FIG. [Figure 23] FIG. 10 is a cross-sectional view of a movable core of another embodiment of a direct-acting magnetic path portion of the present invention. [Figure 24] FIG. 1 is a cross-sectional view of a magnetic path portion according to a first embodiment of the present invention, which can improve the initial electromagnetic attraction force. [Figure 25] FIG. 25 is an exploded perspective view of the magnetic path portion shown in FIG. 24. [Figure 26] FIG. 25 is an enlarged view of a portion C in FIG. 24. [Figure 27] 25 is a schematic diagram showing the correspondence relationship between the magnetic gap and the attraction / reaction force of the magnetic path portion shown in FIG. 24. FIG. [Figure 28] FIG. 10 is a cross-sectional view of a second embodiment of a magnetic path portion capable of improving the initial electromagnetic attraction force of the present invention. [Figure 29] FIG. 29 is an exploded perspective view of a second embodiment of the magnetic path portion shown in FIG. 28. [Figure 30] FIG. 10 is a cross-sectional view of a magnetic path portion according to a third embodiment of the present invention, which can improve the initial electromagnetic attraction force. [Figure 31] FIG. 31 is an exploded perspective view of a third embodiment of the magnetic path portion shown in FIG. 30. [Figure 32] FIG. 10 is a cross-sectional view of a magnetic path portion according to a fourth embodiment of the present invention, which can improve the initial electromagnetic attraction force. [Figure 33] FIG. 33 is an exploded perspective view of a fourth embodiment of the magnetic path portion shown in FIG. 32. [Figure 34] FIG. 10 is a cross-sectional view of a magnetic path portion according to a fifth embodiment of the present invention, which can improve the initial electromagnetic attraction force. [Figure 35] FIG. 35 is a perspective exploded view of a fifth embodiment of a magnetic path portion capable of improving the initial electromagnetic attractive force shown in FIG. 34. [Figure 36] FIG. 36 is an enlarged view of a portion D in FIG. [Figure 37]FIG. 10 is a cross-sectional view of a magnetic path portion according to a sixth embodiment of the present invention. [Figure 38] FIG. 38 is an exploded perspective view of a sixth embodiment of the magnetic path portion shown in FIG. 37. DETAILED DESCRIPTION OF THE INVENTION

[0023] Next, exemplary embodiments will be described in more detail with reference to the drawings. However, the exemplary embodiments may be implemented in various forms and should not be understood as being limited to the embodiments described herein. Although relative terms such as "above" and "below" are used herein to describe the relative relationship of one component of an icon to another, these terms are used herein for convenience only in the direction shown in the drawings. It will be understood that if the icon device is flipped upside down, the component described as "above" becomes the component located "below." Other relative terms, such as "top" and "bottom," have similar meanings. When a structure is "above" another structure, it can mean that the structure is integrally formed with the other structure, that the structure is "directly" attached to the other structure, or that the structure is "indirectly" attached to the other structure.

[0024] The terms "a," "one," "the," and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprise" and "have" are used to denote an open inclusion and mean that other elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first," "second," etc. are used as indicative terms only and do not constitute a quantitative limitation on their subject matter.

[0025] Example 1 of the magnetic path part where the initial electromagnetic attraction force is strengthened 1 to 6, the magnetic path portion of the present invention in which the initial electromagnetic attractive force is strengthened includes a coil 1, a movable magnetic conductor 2, a return spring 41, and a stationary magnetic conductor 3. The coil 1, the movable magnetic conductor 2, and the stationary magnetic conductor 3 are attached in suitable positions, respectively, so that the magnetic pole face 21 of the movable magnetic conductor 2 and the magnetic pole face 31 of the stationary magnetic conductor 3 are positioned opposite each other with a predetermined magnetic gap between them, and when the coil 1 is energized, the movable magnetic conductor 2 is attracted to the stationary magnetic conductor 3, the return spring 41 is provided between the center of the movable magnetic conductor 2 and the center of the stationary magnetic conductor 3, and the two corresponding magnetic pole faces have an annular shape, i.e., the magnetic pole face 21 of the movable magnetic conductor 2 is annular, and the magnetic pole face 31 of the stationary magnetic conductor 3 is also annular. In this embodiment, the movable magnetic conductor 2 is a movable iron core, and has a groove 22 in the middle for attaching a return spring 41, and since the groove 22 is provided in the middle of the surface of the movable iron core 2 facing the stationary magnetic conductor 3, the magnetic pole face 21 of the movable iron core 2 is annular. The stationary magnetic conductor 3 is a yoke plate, and has a groove 32 in the middle for attaching a return spring 41, and the magnetic pole face 31 of the yoke plate 3 is an annular region whose position corresponds to the annular magnetic pole face 21 of the movable iron core 2.

[0026] The magnetic path portion further includes a magnetically conductive tube 42 and a U-shaped yoke 43. The coil 1 is disposed in the U-shaped opening of the U-shaped yoke 43. The magnetically conductive tube 42 is disposed in the intermediate through-hole of the coil 1, and its bottom end is connected to the U-shaped yoke 43. The movable core 2 is movably disposed in the intermediate through-hole of the coil 1 and the intermediate through-hole of the magnetically conductive tube 42, and the upper end surface of the movable core 2 forms a magnetic pole surface 21. A yoke plate 3 is attached to the upper end of the U-shaped yoke 43 and is positioned above the coil 1 and the movable core 2. A return spring 41 is attached between the movable core 2 and the yoke plate 3 to reset the movable core. The lower end surface of the yoke plate 3 forms a magnetic pole surface 31. When the coil 1 is energized, the movable core 2 moves upward and is attracted to the yoke plate 3.

[0027] In this embodiment, one of the two magnetic pole faces 21, 31, has a convex portion 5 that protrudes toward the other magnetic pole face 31, and in this embodiment, the convex portion 5 is provided on the movable iron core 2, and the other magnetic pole face 31 has a recess 6 at a position corresponding to the convex portion 5, so that the movable iron core 2 and the yoke plate 3 can be attracted to each other and the convex portion 5 can be fitted into it, that is, the recess 6 is provided on the yoke plate 3, and a certain distance is provided from the convex portion 5 and the recess 6 to the annular inner ring and outer ring of the corresponding magnetic pole face.

[0028] Taking the movable core 2 as an example, there is a fixed distance from the protrusion 5 of the movable core 2 to the inner ring 211 of the magnetic pole face 21, which can be set as needed, and there is also a fixed distance from the protrusion 5 of the movable core 2 to the outer ring 212 of the magnetic pole face 21, which can also be set as needed. That is, the protrusion 5 of the movable core 2 cannot be located at the position between the inner ring 211 of the magnetic pole face 21 and the outer ring 212 of the magnetic pole face 21, and the resultant force of the attractive forces on both sides generated between the protrusion 5 and the recess 6 in the longitudinal cross section (shown in FIGS. 3 and 5) aligned with the protrusion 5 and the recess 6 when current is applied to the coil 1 always flows in the direction of movement of the movable core 2 toward the yoke plate 3. As a result, by using the protrusion 5 to reduce the magnetic gap between the two magnetic pole faces 21, 31 at the protrusion position, the magnetic resistance is reduced and the initial electromagnetic attractive force is increased.

[0029] In this embodiment, the pole surface 21 of the movable core 2 has one protrusion 5, and the pole surface 31 of the yoke plate 3 has one recess 6 at a corresponding position.

[0030] In this embodiment, the protrusions 5 on the magnetic pole surface 21 of the movable core 2 are integrally formed with the magnetic pole surface 21 of the movable core 2 .

[0031] In this embodiment, the protrusions 5 on the pole face 21 of the movable core 2 are striped.

[0032] In this embodiment, the protrusion 5 on the magnetic pole face 21 of the movable core 2 is annular.

[0033] In this embodiment, the two opposing sides of the protrusion 5 on the magnetic pole surface 21 of the movable core 2 are both vertical surfaces, and the two sides of the protrusion 5 have a symmetrical structure in a longitudinal cross section (shown in Figures 3 and 5).

[0034] As shown in Figures 3 and 5, in this embodiment, the upper surface 51 of the protrusion 5 is flat, and when the protrusion 5 is fitted into the recess 6, the gaps at various points between the side surface 52 of the protrusion 5 and the side wall 61 of the recess 6 are exactly the same.As a result, when current is applied to the coil 1, the direction of the resultant force generated between the protrusion 5 and the recess 6 is always along the direction in which the movable iron core 2 moves toward the yoke plate 3.

[0035] In this embodiment, the area of ​​the upper surface of the protrusion 5 on the pole face 21 of the movable core 2 is smaller than the area remaining after the protrusion 5 on the pole face 21 of the movable core 2 is removed.

[0036] In this embodiment, the protruding height of the convex portion 5 on the magnetic pole surface 21 of the movable iron core 2 is smaller than the specified magnetic gap between the two magnetic pole surfaces 21, 31, and the distance from the side edge on the upper surface of the convex portion 5 to the side wall at the corresponding recess mouth portion of the recess 6 is smaller than the specified magnetic gap between the two magnetic pole surfaces 21, 31.

[0037] In this embodiment, when the convex portion 5 of the magnetic pole surface 21 of the movable iron core 2 is fitted into the concave portion 6 of the magnetic pole surface 31 of the yoke plate 3, the gap between the side surface 52 of the convex portion 5 and the side wall 61 of the concave portion 6 is greater than or equal to the distance between the top surface 51 of the convex portion 5 and the bottom surface 62 of the concave portion 6, and the distance from the top surface 51 of the convex portion 5 to the bottom surface 62 of the concave portion 6 is greater than or equal to the distance between the two magnetic pole surfaces 21, 31, ensuring the holding force when adsorbed.

[0038] As shown in Figure 3, immediately after current is applied to the coil 1, an attractive force is generated between the movable core 2 and the yoke plate 3, and this attractive force includes attractive forces F1 and F2 between both side edges of the convex portion 5 of the movable core 2 and both corresponding edges of the concave portion 6 of the yoke plate 3, attractive force F5 between the top surface 51 of the convex portion of the movable core 2 and the bottom surface 62 of the concave portion 6 of the yoke plate 3, and attractive forces F3 and F4 between the magnetic pole faces 21 on both sides of the convex portion 5 and the magnetic pole faces 31 on both sides of the concave portion 6.

[0039] At startup, the gaps at the attractive forces F1 and F2 are smaller than the gaps at the attractive forces F3, F4, and F5, and the attractive forces F1 and F2 are larger, the gap at the attractive force F1 is equal to the gap at the attractive force F2, and the resultant force of the attractive forces F1 and F2 is along the direction in which the movable iron core 2 moves toward the yoke plate 3. Due to the attractive forces F1 and F2, the initial electromagnetic attractive force is strengthened.

[0040] From the time the magnetic path section starts to the time when the magnetic pole face 21 of the movable core 2 and the magnetic pole face 31 of the yoke plate 3 are attracted to each other, the gaps at the attractive forces F1 and F2 are equal, the attractive forces are symmetrical, and the resultant force is still in the direction in which the movable core 2 is attracted to the yoke plate 3. As the gaps at the attractive forces F3, F4, and F5 decrease, the attractive forces F3, F4, and F5 gradually increase and gradually play a dominant role. After the magnetic pole face 21 of the movable core 2 and the magnetic pole face 31 of the yoke plate 3 are attracted to each other and enter the holding state, the attractive forces F3, F4, and F5 reach their maximums, the attractive forces F1 and F2 are small, and the resultant force of the attractive forces F1 and F2 is still in the direction in which the movable core 2 is attracted to the yoke plate 3, as shown in Figure 5.

[0041] The high voltage DC relay of the present invention includes a magnetic path portion where the initial electromagnetic attractive force is strengthened.

[0042] 7, which shows the relationship between the magnetic gap and the attractive force / reaction force in the high-voltage DC relay of the present invention, with Curve 1 representing the reaction force of the relay, Curve 2 representing the attractive force of the prior art relay, and Curve 3 representing the attractive force of the relay of the present invention. At the moment the relay is turned on, the magnetic gap is at its maximum, as shown on the right (i.e., 1.45 mm). At this point, assuming a driving voltage of 7 V is applied to the coil, the prior art would generate an electromagnetic attractive force (the right side of Curve 2 in FIG. 7). In the present invention, the provision of a protrusion 5 on the movable core 2 reduces the magnetic gap, reduces the initial magnetic resistance, improves the initial attractive force, and reduces starting power consumption. Although the driving voltage is still 7 V at this point, the generated electromagnetic attractive force is greater (the right side of Curve 3 in FIG. 7). As can be seen from FIG. 7, Curves 2 and 3 intersect at a magnetic gap of 0.35 mm. From a magnetic gap of 1.45 mm to 0.35 mm, the electromagnetic attractive force of the present invention is greater than that of the prior art. When generating the same electromagnetic attractive force as in the prior art, only a smaller drive voltage is required, resulting in reduced drive power consumption. Since recesses 6 are provided on the magnetic pole surface 31 of the yoke plate 3 at positions corresponding to the protrusions 5 of the movable iron core 2, the magnetic poles continue to move as the iron core is completely closed, that is, until the magnetic pole surface 21 of the movable iron core 2 is attracted to the magnetic pole surface 31 of the yoke plate 3, by cooperation of the protrusions 5 and the recesses 6.

[0043] The magnetic path portion and high-voltage DC relay of the present invention, in which the initial electromagnetic attractive force is enhanced, have a convex portion 5 on the magnetic pole surface 21 of the movable core 2 that protrudes toward the magnetic pole surface 31 of the yoke plate 3, and a concave portion 6 on the magnetic pole surface 31 of the yoke plate 3 at a position corresponding to the convex portion 5, into which the movable core 2 and the yoke plate 3 are attracted to each other and into which the convex portion 5 of the magnetic pole surface 21 of the movable core 2 can fit, and the resultant direction of the attractive force generated between the convex portion 5 and the concave portion 6 when the coil 1 is energized is always along the direction in which the movable core 2 is attracted to the yoke plate 3, resulting in a greater attractive force. This configuration of the present invention utilizes the convex portion 5 on the pole face 21 of the movable core 2 to reduce the magnetic gap between the two pole faces 21, 31 at the convex portion position, thereby reducing magnetic resistance and increasing initial electromagnetic attraction, or, with the same initial electromagnetic attraction, reducing coil volume and coil power consumption. The present invention utilizes the concave portion 6 on the pole face 31 of the yoke plate 3 to cooperate with the convex portion 5 on the pole face 21 of the movable core 2, ensuring the two pole faces 21, 31 are attracted to a predetermined position. The convex portion 5 on the pole face 21 of the movable core 2 and the concave portion 6 on the pole face 31 of the yoke plate 3 of the present invention are located on the periphery of the return spring 41, making efficient use of the limited magnetic pole space and not occupying the return spring's space (i.e., not affecting the reset function). In particular, this embodiment employs an annular convex portion 5, which cooperates with the convex portion in a 360-degree circular vertical cross section around the middle return spring 41, maximizing the initial attraction.

[0044] Example 2 of the magnetic path part where the initial electromagnetic attraction force is strengthened As shown in FIG. 8, the difference between the magnetic path portion in which the initial electromagnetic attraction force is increased in Example 2 of the present invention and Example 1 is that the protrusion 5 is a separate component and is fixed to the magnetic pole surface 21 of the movable core 2.

[0045] Example 3 of the magnetic path part where the initial electromagnetic attraction force is strengthened As shown in FIG. 9, the difference between the magnetic path portion in which the initial electromagnetic attraction force is strengthened in the third embodiment of the present invention and the first embodiment is that the convex portion 5 has a convex shaft shape. Of course, the convex shaft-shaped protrusion 5 may be an independent component, and the convex shaft-shaped protrusion 5 is fixed to the magnetic pole surface 21 of the movable core 2 .

[0046] Example 4 of the magnetic path portion where the initial electromagnetic attraction force is strengthened As shown in FIG. 10, the difference between the fourth embodiment and the third embodiment in the magnetic path portion where the initial electromagnetic attraction force is increased is that there are two convex portions 5 in the shape of a convex shaft.

[0047] Example 5 of the magnetic path part where the initial electromagnetic attraction force is strengthened As shown in Figures 11 and 12, the difference between Example 5 and Example 1 in the magnetic path portion of the present invention where the initial electromagnetic attraction force is increased is that there are two annular protrusions 5 and two correspondingly arranged recesses 6 on the magnetic pole face 31 of the yoke plate 3.

[0048] Of course, the two annular projections 5 may be separate components, and the two projections 5 are fixed to the magnetic pole surface 21 of the movable core 2 .

[0049] Example 6 of the magnetic path portion where the initial electromagnetic attraction force is increased As shown in Figure 13, the difference between Example 6 and Example 1 in the magnetic path portion of the present invention where the initial electromagnetic attraction force is increased is that the stripe-shaped protrusions 5 are arc-shaped, there are two arc-shaped protrusions 5, and there are two recesses 6 of corresponding shapes on the magnetic pole surface 31 of the yoke plate 3. Of course, the two arc-shaped protrusions 5 may be separate components, and the two protrusions 5 are fixed to the magnetic pole surface 21 of the movable core 2 .

[0050] Example 7 of the magnetic path portion where the initial electromagnetic attraction force is increased 14, the magnetic path portion of Example 7 in which the initial electromagnetic attraction force is increased differs from Example 1 in that the side surfaces 52 on both sides of the protrusion 5 of the movable core 2 are inclined. In this example, the side surfaces 52 on both sides of the protrusion 5 of the movable core 2 are inclined, and both side walls of the corresponding recess 6 of the yoke plate 3 are inclined. In this structure, the protruding height of the protrusion 5 of the magnetic pole surface 21 of the movable core 2 may be designed to be smaller than the predetermined magnetic gap between the two magnetic pole surfaces 21, 31, or the protruding height of the protrusion 5 of the magnetic pole surface 21 of the movable core 2 may be designed to be larger than the predetermined magnetic gap between the two magnetic pole surfaces 21, 31. In the latter case, when the coil is not energized, the protrusion 5 of the magnetic pole surface 21 of the movable core 2 is partially fitted into the recess 6 of the yoke plate 3. Example 8 of the magnetic path part where the initial electromagnetic attraction force is increased As shown in FIG. 15, the difference between the eighth embodiment and the sixth embodiment in the magnetic path portion where the initial electromagnetic attraction force is increased is that the stripe-shaped protrusions 5 are linear.

[0051] Example 9 of the magnetic path part where the initial electromagnetic attraction force is strengthened As shown in Figures 16 and 17, the difference between Example 9 and Example 1 in the magnetic path portion of the present invention where the initial electromagnetic attraction force is increased is that a convex portion 5 is provided on the magnetic pole surface 31 of the yoke plate 3, and a concave portion 6 is provided on the magnetic pole surface 21 of the movable core 2.

[0052] Ten examples of magnetic path parts where the initial electromagnetic attraction force is increased As shown in Figures 18 and 19, the difference between Example 1 and Example 1 in the magnetic path portion of the present invention in which the initial electromagnetic attraction force is enhanced is that there are two stationary magnetic bodies, that is, in addition to the yoke plate 3, there is also a stationary iron core 7, and the stationary iron core 7 is attached to the yoke plate 3, and it is the lower end surface of the stationary iron core 7 that matches the magnetic pole surface 21 of the movable iron core 2, that is, the lower end surface of the stationary iron core 7 is configured so that the magnetic pole surface 71 matches the magnetic pole surface 21 of the movable iron core 2, and therefore in this example, the recess 6 is provided on the magnetic pole surface 71 of the stationary iron core 7.

[0053] Example 11 of the magnetic path portion where the initial electromagnetic attraction force is increased As shown in Figures 20 and 21, the difference between Example 11 and Example 10 in the magnetic path portion of the present invention where the initial electromagnetic attraction force is increased is that a convex portion 5 is provided on the magnetic pole surface 71 of the stationary iron core 7, and a concave portion 6 is provided on the magnetic pole surface 21 of the movable iron core 2. The present invention also provides a direct-acting magnetic path part and a high-voltage DC relay, and by improving the structure, it is possible to increase the initial electromagnetic attractive force with the same coil volume and power consumption, or to reduce the coil volume and power consumption with the same initial electromagnetic attractive force.

[0054] The technical solution of the present invention is a linear magnetic path part including a coil, a movable magnetic body, and a stationary magnetic body, wherein the coil, the movable magnetic body, and the stationary magnetic body are respectively arranged in suitable positions, so that the magnetic pole face of the movable magnetic body and the magnetic pole face of the stationary magnetic body are arranged in opposing positions with a predetermined magnetic gap between them, and when the coil is energized, the movable magnetic body is attracted to the stationary magnetic body, one of the two magnetic pole faces has a convex portion protruding toward the other magnetic pole face, and the other magnetic pole face has a concave portion at a position corresponding to the convex portion, into which the convex portion can be fitted, and the concave depth of the concave portion is greater than or equal to the protruding height of the convex portion.

[0055] According to one embodiment of the present invention, when the coil is not energized, the protruding height of the convex portion is smaller than a predetermined magnetic gap between the two magnetic pole faces.

[0056] According to one embodiment of the present invention, when the protrusion is fully inserted into the recess, the gaps between all the side surfaces of the protrusion and the corresponding side walls of the recess are completely the same.

[0057] According to one embodiment of the present invention, when the convex portion is fully inserted into the concave portion, the gap between the side surface of the convex portion and the side wall of the concave portion is equal to or greater than the distance from the top surface of the convex portion to the bottom surface of the concave portion, and the distance from the top surface of the convex portion to the bottom surface of the concave portion is equal to or greater than the distance between two magnetic pole faces. According to one embodiment of the present invention, the upper surface of the convex portion is flat, and the distance from the side edge of the upper surface of the convex portion to the side edge of the corresponding recess opening of the recess is smaller than the predetermined magnetic gap between the two magnetic pole faces.

[0058] According to one embodiment of the present invention, the side surface of the convex portion is one or a combination of two or more of a vertical surface, an inclined surface, and a curved surface.

[0059] According to one embodiment of the present invention, the number of said protrusions is one or more, and the number of said recesses is one or more at corresponding positions.

[0060] According to one embodiment of the present invention, the protrusion is a separate component and is fixed to the pole face.

[0061] According to one embodiment of the present invention, the protrusion is an integral structure molded onto the pole face.

[0062] According to one embodiment of the present invention, the convex portion has a convex shaft shape.

[0063] According to one embodiment of the present invention, the protrusions are stripe-shaped.

[0064] According to one embodiment of the present invention, the convex portion is linear, arcuate, or annular.

[0065] According to one embodiment of the present invention, the sum of the areas of the upper surfaces of all the convex portions on the magnetic pole face is smaller than the area remaining when all the convex portions on the magnetic pole face are removed.

[0066] According to one embodiment of the present invention, the one magnetic pole face is provided on a movable magnetic conductive body, and the other magnetic pole face is provided on a stationary magnetic conductive body, and the movable magnetic conductive body is a movable iron core.

[0067] The stationary magnetic body is a fixed iron core or a yoke plate.

[0068] Another aspect of the present invention provides a high voltage DC relay including the above-described direct acting magnetic path portion.

[0069] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0070] The present invention provides a magnetic coil having two pole faces, one of which has a protrusion protruding toward the other pole face, and a recess in the other pole face at a position corresponding to the protrusion, into which the protrusion can be fitted, the recess having a depth equal to or greater than the protruding height of the protrusion, and the protruding height of the protrusion being smaller than a predetermined magnetic gap between the two pole faces when the coil is not energized. This configuration of the present invention utilizes the protrusion of one of the two pole faces to reduce the magnetic gap between the two pole faces at the position of the protrusion, thereby reducing magnetic reluctance and increasing the initial electromagnetic attractive force, or, with the same initial electromagnetic attractive force, reducing the coil volume and reducing coil power consumption. The present invention also ensures attraction at a predetermined position between the two pole faces by using the recess of the other pole face in cooperation with the protrusion of one pole face.

[0071] As shown in FIGS. 1 to 22, the embodiments of the magnetic path portion in which the initial electromagnetic attraction force is increased can also be applied to the direct-acting magnetic path portion of the present invention. For the sake of simplicity, the direct-acting magnetic path portion and high-voltage DC relay of the present invention will be described in more detail below using FIGS. 1 to 22, but the direct-acting magnetic path portion and high-voltage DC relay of the present invention are not limited to the embodiments.

[0072] Example 1 of the direct acting magnetic circuit part As shown in FIGS. 1 to 6, the linear magnetic path portion of the present invention includes a coil 1, a movable magnetic conductor 2, and a stationary magnetic conductor 3. The coil 1, the movable magnetic conductor 2, and the stationary magnetic conductor 3 are arranged in suitable positions, so that the magnetic pole surface 21 of the movable magnetic conductor 2 and the magnetic pole surface 31 of the stationary magnetic conductor 3 are positioned opposite to each other with a predetermined magnetic gap therebetween. When the coil 1 is energized, the movable magnetic conductor 2 is attracted to the stationary magnetic conductor 3. In this embodiment, the movable magnetic conductor The magnetic body 2 is a movable iron core, the stationary magnetic body 3 is a yoke plate, the magnetic path portion further includes a spring 41, a magnetic conductive tube 42, and a U-shaped yoke 43, the coil 1 is provided in the U-shaped opening of the U-shaped yoke 43, the magnetic conductive tube 42 is provided in the intermediate through-hole of the coil 1, and the bottom end of the magnetic conductive tube 42 is connected to the U-shaped yoke 43, the movable iron core 2 is movably provided in the intermediate through-hole of the coil 1 and the intermediate through-hole of the magnetic conductive tube 42, and the upper end surface of the movable iron core 2 is a magnetic The yoke plate 3 is attached to the upper end of the U-shaped yoke 43 and is located above the coil 1 and the movable iron core 2. The spring 41 is attached between the movable iron core 2 and the yoke plate 3 to reset the movable iron core 2. The lower end surface of the yoke plate 3 is the magnetic pole surface 31. When the coil 1 is energized, the movable iron core 2 moves upward and is attracted to the yoke plate 3. In this embodiment, the magnetic pole surface 21 of the movable iron core 2, which is one of the two magnetic pole surfaces, is in the direction of the other magnetic pole surface. A protrusion 5 protruding toward the magnetic pole surface 31 of the yoke plate 3 is provided, and a recess 6 into which the protrusion 5 can be fitted is provided on the magnetic pole surface 31 of the yoke plate 3 at a position corresponding to the protrusion 5, and the recess depth of the recess 6 on the magnetic pole surface 31 of the yoke plate 3 is equal to or greater than the protruding height of the protrusion 5 on the magnetic pole surface 21 of the movable iron core 2, and when the coil 1 is not energized, the protruding height of the protrusion 5 on the magnetic pole surface 21 of the movable iron core 2 is smaller than a predetermined magnetic gap between the two magnetic pole surfaces 21, 31.

[0073] In this embodiment, when the protrusion 5 is fitted into the recess 6, the gaps between all the side surfaces 52 of the protrusion 5 and the corresponding side walls 61 of the recess 6 are all the same.

[0074] In this embodiment, when the protrusion 5 is fitted into the recess 6, the gap between the side surface 52 of the protrusion 5 and the side wall 61 of the recess 6 is greater than or equal to the distance from the top surface 51 of the protrusion 5 to the bottom surface 62 of the recess 6, and the distance from the top surface 51 of the protrusion 5 to the bottom surface 62 of the recess 6 is greater than or equal to the distance between the two magnetic pole surfaces 21, 31.

[0075] In this embodiment, the upper surface 51 of the protrusion 5 is flat, and the distance from the side edge of the upper surface 51 of the protrusion 5 to the side edge of the corresponding recess opening of the recess 6 is smaller than the predetermined magnetic gap between the two magnetic pole faces 21, 31.

[0076] In this embodiment, the pole surface 21 of the movable core 2 has one protrusion 5, and the pole surface 31 of the yoke plate 3 has one recess 6 at a corresponding position. In this embodiment, the protrusions 5 on the magnetic pole surface 21 of the movable core 2 are integrally formed with the magnetic pole surface 21 of the movable core 2 .

[0077] In this embodiment, the protrusions 5 on the magnetic pole face 21 of the movable core 2 are distributed in a striped pattern.

[0078] In this embodiment, the protrusion 5 on the pole face 21 of the movable core 2 is annular.

[0079] In this embodiment, both side surfaces of the protrusion 5 of the magnetic pole surface 21 of the movable core 2 are vertical surfaces.

[0080] As shown in Figures 3 and 5, in this embodiment, the upper surface 51 of the protrusion 5 is flat, and when the protrusion 5 is fitted into the recess 6, the gaps at all points between the side surface 52 of the protrusion 5 and the side wall 61 of the recess 6 are exactly the same.As a result, when current is applied to the coil 1, the direction of the resultant force of attraction generated between the protrusion 5 and the recess 6 is always along the direction in which the movable iron core 2 is attracted to the yoke plate 3.

[0081] In this embodiment, the area of ​​the upper surface of the protrusion 5 on the pole face 21 of the movable core 2 is smaller than the area remaining after the protrusion 5 on the pole face 21 of the movable core 2 is removed.

[0082] As shown in Figure 3, immediately after the coil 1 is energized, an attractive force is generated between the movable core 2 and the yoke plate 3, and this attractive force includes attractive forces F1 and F2 between both sides of the convex portion 5 of the movable core 2 and both corresponding edges of the concave portion 6 of the yoke plate 3, attractive force F5 between the top surface 51 of the convex portion of the movable core 2 and the bottom surface 62 of the concave portion 6 of the yoke plate 3, and attractive forces F3 and F4 between the magnetic pole faces 21 and 31 on both sides of the convex portion 5.

[0083] At startup, the gaps at attractive forces F1 and F2 are smaller than the gaps at attractive forces F3, F4, and F5, and attractive forces F1 and F2 are larger. The gap at attractive force F1 is equal to the gap at attractive force F2, and the resultant force of attractive forces F1 and F2 is in the direction in which movable core 2 is attracted to yoke plate 3. The initial electromagnetic attractive force is strengthened by attractive forces F1 and F2. After startup, before magnetic pole face 21 of movable core 2 and magnetic pole face 31 of yoke plate 3 are attracted to each other, attractive forces F1 and F2 are simultaneously attracted, the gaps at attractive forces F1 and F2 are equal, the attractive forces are symmetrical, and the resultant force is still in the direction in which movable core 2 is attracted to yoke plate 3. As the gaps at attractive forces F3, F4, and F5 decrease, attractive forces F3, F4, and F5 gradually increase and gradually play a dominant role. After the magnetic pole surface 21 of the movable core 2 and the magnetic pole surface 31 of the yoke plate 3 are attracted to each other, they are in a holding state. As shown in FIG. 5, the attractive forces F3, F4, and F5 reach their maximum, the attractive forces F1 and F2 are small, and the resultant force of the attractive forces F1 and F2 is still along the direction in which the movable core 2 is attracted to the yoke plate 3.

[0084] The high voltage DC relay of the present invention includes the above-described direct acting magnetic path portion.

[0085] In the direct-acting magnetic path portion and high-voltage DC relay of the present invention, the pole face 21 of the movable core 2 is provided with a protrusion 5 that protrudes toward the pole face 31 of the yoke plate 3, and the pole face 31 of the yoke plate 3 is provided with a recess 6 at a position corresponding to the protrusion 5, into which the movable core 2 and the yoke plate 3 are attracted to each other and into which the protrusion 5 of the pole face 21 of the movable core 2 can fit. This configuration of the present invention utilizes the protrusion 5 of the pole face 21 of the movable core 2 to reduce the magnetic gap between the two pole faces 21, 31 at the position of the protrusion, thereby reducing magnetic reluctance and increasing the initial electromagnetic attractive force, or, with the same initial electromagnetic attractive force, reducing the coil volume and reducing coil power consumption. The present invention utilizes the recess 6 of the pole face 31 of the yoke plate 3 to cooperate with the protrusion 5 of the pole face 21 of the movable core 2 to ensure attraction between the two pole faces 21, 31 at a predetermined position.

[0086] Example 2 of the direct-acting magnetic path part As shown in FIG. 8, the difference between the first and second embodiments of the direct-acting magnetic path portion and high-voltage DC relay of the present invention is that the protrusion 5 is a separate component and is fixed to the magnetic pole surface 21 of the movable core 2.

[0087] Direct-acting magnetic path part example 3 As shown in FIG. 9, the direct acting magnetic path portion and high voltage DC relay of the third embodiment of the present invention differ from the first embodiment in that the protrusion 5 has a convex shaft shape.

[0088] Of course, the convex shaft-shaped protrusion 5 may be an independent component, and the convex shaft-shaped protrusion 5 is fixed to the magnetic pole surface 21 of the movable core 2 .

[0089] Example 4 of the direct-acting magnetic path part As shown in FIG. 10, the fourth embodiment of the direct-acting magnetic path portion and high voltage DC relay of the present invention differs from the third embodiment in that there are two convex shaft-shaped convex portions 5.

[0090] Direct-acting magnetic path part example 5 As shown in Figures 11 and 12, the difference between Example 5 and Example 1 of the direct-acting magnetic path portion and high-voltage DC relay of the present invention is that there are two annular protrusions 5 and two corresponding recesses 6 on the magnetic pole face 31 of the yoke plate 3.

[0091] Of course, the two annular projections 5 may be separate components, and the two projections 5 are fixed to the magnetic pole surface 21 of the movable core 2 .

[0092] Example 6 of the direct-acting magnetic path part As shown in FIG. 13, the sixth embodiment of the direct-acting magnetic path portion and high-voltage DC relay of the present invention differs from the first embodiment in that the stripe-shaped protrusions 5 are arc-shaped, there are two arc-shaped protrusions 5, and there are two recesses 6 of corresponding shapes on the magnetic pole face 31 of the yoke plate 3.

[0093] Of course, the two arc-shaped protrusions 5 may be separate components, and the two protrusions 5 are fixed to the magnetic pole surface 21 of the movable core 2 .

[0094] Example 7 of the direct-acting magnetic path part As shown in FIG. 11, the direct-acting magnetic path portion and high voltage DC relay of the present invention differ from those of the first embodiment in that the side surfaces 52 on both sides of the protrusion 5 of the movable core 2 are inclined.

[0095] Example 8 of the direct acting magnetic circuit part As shown in FIG. 15, the direct acting magnetic path portion and high voltage DC relay of the present invention differ from those of the sixth embodiment in that the striped convex portions 5 are linear.

[0096] Example 9 of the direct-acting magnetic path part As shown in FIG. 22, the direct-acting magnetic path portion and high voltage DC relay of the present invention differ from the first embodiment in that one side surface 52 of the protrusion 5 of the movable core 2 is an inclined surface.

[0097] Example 10 of the direct-acting magnetic path part As shown in FIG. 23, the direct-acting magnetic path portion and high voltage DC relay of the present invention differ from those of the first embodiment in that the height positions of the bases of both sides of the protrusion 5 of the movable core 2 do not coincide.

[0098] Example 11 of direct-acting magnetic circuit part As shown in Figures 16 and 17, the direct-acting magnetic path portion and high-voltage DC relay of the present invention differ from those of the first embodiment in that a convex portion 5 is provided on the magnetic pole surface 31 of the yoke plate 3, and a concave portion 6 is provided on the magnetic pole surface 21 of the movable core 2.

[0099] Example 12 of the direct-acting magnetic circuit part As shown in Figures 18 and 19, the direct-acting magnetic path portion and high-voltage DC relay of the present invention differ from the first embodiment in that there are two stationary magnetic bodies, and in addition to the yoke plate 3, there is also a stationary iron core 7, which is attached to the yoke plate 3, and the bottom end surface of the stationary iron core 7 matches the magnetic pole surface 21 of the movable iron core 2. In other words, the bottom end surface of the stationary iron core 7 is configured so that the magnetic pole surface 71 matches the magnetic pole surface 21 of the movable iron core 2, so in this embodiment, the recess 6 is provided on the magnetic pole surface 71 of the stationary iron core 7.

[0100] Example 13 of direct-acting magnetic path part As shown in Figures 20 and 21, the direct-acting magnetic path portion and high-voltage DC relay of the present invention differ from those of Example 12 in that a convex portion 5 is provided on the magnetic pole surface 71 of the stationary core 7, and a concave portion 6 is provided on the magnetic pole surface 21 of the movable core 2.

[0101] The present invention also provides a magnetic path portion and a high-voltage DC relay that can improve the initial electromagnetic attractive force, and by improving the structure, it is possible to increase the initial electromagnetic attractive force with the same coil volume and power consumption, or to reduce the coil volume and power consumption while maintaining the same initial electromagnetic attractive force.

[0102] The technical solution of the present invention is a magnetic path part capable of improving the initial electromagnetic attraction force, which includes a coil, a movable magnetic body, and a stationary magnetic body, and the coil, the movable magnetic body, and the stationary magnetic body are respectively attached in suitable positions, so that the magnetic pole face of the movable magnetic body and the magnetic pole face of the stationary magnetic body are positioned opposite to each other with a predetermined magnetic gap, and when the coil is energized, the movable magnetic body is attracted to the stationary magnetic body, and the magnetic path part further includes a protruding member, and the protruding member faces the magnetic pole face of one of the two members, the movable magnetic body and the stationary magnetic body. When the movable magnetic conductive body is not moving, the convex member protrudes from the magnetic pole face of one member toward the magnetic pole face of the other member, thereby reducing the magnetic gap between the magnetic pole faces of the two members at the position of the convex member, thereby reducing the magnetic resistance and improving the initial electromagnetic attraction force.After the movable magnetic conductive body moves and the convex member of one member abuts against the magnetic pole face of the other member, the convex member moves in the opposite direction of protrusion, thereby ensuring adhesion at a predetermined position between the magnetic pole faces of the two members.

[0103] According to one embodiment of the present invention, the convex member has a block structure with a protrusion, and a slide groove is provided at a location corresponding to the magnetic pole face of one of the two members, the movable magnetic body and the stationary magnetic body, and the convex member of the block structure is slidably arranged in the slide groove of one of the two members, the movable magnetic body and the stationary magnetic body, so that the protrusion of the convex member protrudes from the magnetic pole face of the one member toward the magnetic pole face of the other member.

[0104] According to one embodiment of the present invention, a first staircase structure is provided between the protruding block structure and the slide groove, and the first staircase structure restricts the movement of the protruding portion of the convex member toward the magnetic pole face of the other member, thereby ensuring that there is a certain gap between the protruding portion of the convex member of the one member and the magnetic pole face of the other member when the movable magnetic body is not moving.

[0105] According to one embodiment of the present invention, there is one or more protruding block structures, and there is one or more corresponding slide grooves in one of the two members, the movable magnetic body and the stationary magnetic body.

[0106] According to one embodiment of the present invention, the convex member is an annular member, which is slidably arranged around the outer periphery of one of the two members, the movable magnetic body and the stationary magnetic body, and one end of the annular member protrudes from the magnetic pole face of the one member toward the magnetic pole face of the other member. According to one embodiment of the present invention, a mating convex edge structure is provided between the other end of the annular member and the outer periphery of one of the two members, the movable magnetic body and the stationary magnetic body, and the convex edge structure restricts the one end of the annular member from moving toward the magnetic pole face of the other member, and ensures that there is a certain gap between the one end of the annular member and the magnetic pole face of the other member when the movable magnetic body is not moving.

[0107] According to one embodiment of the present invention, the protruding member is slidably disposed on the movable magnetic conductive body, and the movable magnetic conductive body is a movable iron core.

[0108] According to one embodiment of the present invention, the convex member is arranged to be slidable on the stationary magnetic conductive body, and the stationary magnetic conductive body is a yoke plate or a stationary iron core.

[0109] Another aspect of the present invention provides a high voltage DC relay including a magnetic path portion capable of improving the above-mentioned initial electromagnetic attraction force.

[0110] Compared with the prior art, the magnetic path portion and high voltage DC relay of the present invention, which can improve the initial electromagnetic attraction force, have the following beneficial effects:

[0111] The magnetic path portion of the present invention is provided with a protruding member, which is slidably disposed at a position corresponding to the magnetic pole face of one of the two members, the movable magnetic conductive body and the stationary magnetic conductive body. When the movable magnetic conductive body is not moving, the protruding member protrudes from the magnetic pole face of one member toward the magnetic pole face of the other member. After the movable magnetic conductive body moves and brings the protruding member of the one member into contact with the magnetic pole face of the other member, the protruding member moves in the opposite direction to the protruding member. In a first aspect, this configuration of the present invention reduces magnetic resistance and improves initial electromagnetic attraction by having the protruding member protrude from the magnetic pole of one member toward the magnetic pole face of the other member so that the magnetic gap between the magnetic pole faces of the two members is reduced at the position of the protruding member. Alternatively, it realizes reducing coil volume and coil power consumption while maintaining the same initial electromagnetic attraction. The present invention uses a protruding member that can move in the opposite direction to the protruding member, thereby ensuring attraction at a predetermined position between the magnetic pole faces of the two members. As a second aspect, there is no need to provide a gap during the attraction process between the movable magnetic body and the stationary magnetic body, and the protruding member is arranged in the gap direction between the movable magnetic body and the stationary magnetic body, so that an attractive force of the movable magnetic body toward the stationary magnetic body can be generated. As a third aspect, even if the protruding height of the protruding member needs to be designed according to the matching of the attractive reaction force, since the protruding member is movable, there is no need to replace the entire movable magnetic body (movable iron core) or stationary magnetic body (stationary iron core or yoke plate) at the design stage, thereby reducing design costs and processes.

[0112] Hereinafter, the magnetic path portion and the high voltage DC relay capable of improving the initial electromagnetic attraction force of the present invention will be described in more detail with reference to the drawings and examples.

[0113] Example 1 of the magnetic path portion that can improve the initial electromagnetic attraction force As shown in Figures 24 to 27, the magnetic path portion of the present invention that can improve the initial electromagnetic attraction force includes a coil 1, a movable magnetic conductor 2, and a stationary magnetic conductor 3, and the coil 1, the movable magnetic conductor 2, and the stationary magnetic conductor 3 are attached in appropriate positions, respectively, so that the magnetic pole surface 21 of the movable magnetic conductor 2 and the magnetic pole surface 31 of the stationary magnetic conductor 3 are positioned opposite to each other with a predetermined magnetic gap, and when the coil 1 is energized, the movable magnetic conductor 2 is attracted to the stationary magnetic conductor 3, and in this embodiment, the movable magnetic conductor 2 is a movable iron core, and the stationary magnetic conductor 3 is a yoke plate, and the magnetic path portion further includes a spring. 41, a magnetic conductive tube 42, and a U-shaped yoke 43, the coil 1 is installed in the U-shaped opening of the U-shaped yoke 43, the magnetic conductive tube 42 is installed in the middle through-hole of the coil 1, and the bottom end of the magnetic conductive tube 42 is connected to the U-shaped yoke 43, the movable iron core 2 is movably installed in the middle through-hole of the coil 1 and the middle through-hole of the magnetic conductive tube 42, the upper end surface of the movable iron core 2 is a magnetic pole surface 21, the yoke plate 3 is attached to the upper end of the U-shaped yoke 43 and is located above the coil 1 and the movable iron core 2, the spring 41 is attached between the movable iron core 2 and the yoke plate 3 to reset the movable iron core 2, and the lower The end surface is a magnetic pole surface 31, and when current is applied to the coil 1, the movable iron core 2 moves upward and is attracted to the yoke plate 3, and the magnetic path portion further includes a protruding member 50 that is slidably arranged at a position corresponding to the magnetic pole surface of one of the two members, the movable magnetic conductive body and the stationary magnetic conductive body, and in this embodiment, one of the two members, the movable magnetic conductive body and the stationary magnetic conductive body, is the stationary magnetic conductive body, i.e., the yoke plate 3, and the other is the movable iron core 2, and the protruding member 50 is slidably arranged at a position corresponding to the magnetic pole surface 31 of the yoke plate 3, and when the movable iron core 2 does not move upward, The convex member 50 protrudes from the magnetic pole surface 31 of the yoke plate 3 toward the magnetic pole surface 21 of the movable core 2, thereby reducing the magnetic gap between the magnetic pole surface 21 of the movable core 2 and the magnetic pole surface 31 of the yoke plate 3 at the position of the convex member 50, thereby reducing the magnetic resistance and improving the initial electromagnetic attraction force.After the movable core 2 moves and brings the convex member 50 of the yoke plate 3 into contact with the magnetic pole surface 21 of the movable core 2, the convex member 50 moves in the opposite direction of protrusion, ensuring adhesion at a predetermined position between the magnetic pole surface 21 of the movable core 2 and the magnetic pole surface 31 of the yoke plate 3. In this embodiment, the convex member 50 has a block structure with a protrusion 510, and a slide groove 36 is provided at a position corresponding to the magnetic pole surface 31 of the yoke plate 3, the convex member 50 of the block structure is arranged to be slidable in the slide groove 36 of the yoke plate 3, the protrusion 510 of the convex member 50 protrudes from the magnetic pole surface 31 of the yoke plate 3 in the direction of the magnetic pole surface 21 of the movable iron core 2, and the upper surface 511 of the protrusion 510 of the convex member 50 is flat.

[0114] In this embodiment, a first staircase structure including a staircase 520 provided on the convex member 50 and a staircase 33 provided in the slide groove 36 of the yoke plate 3 is provided between the block structure 5 with the protrusion 510 and the slide groove 36 of the yoke plate 3. The staircase 520 of the convex member 50 and the staircase 33 of the yoke plate 3 cooperate to restrict movement of the protrusion 510 of the convex member 50 toward the magnetic pole surface 21 of the movable core 2, thereby ensuring a certain gap between the protrusion 510 of the convex member 50 and the magnetic pole surface 21 of the movable core 2 when the movable core 2 is not moving. In other words, the size of the protrusion of the convex member 50 outside the magnetic pole surface 31 of the yoke plate 3 is smaller than the predetermined magnetic gap between the magnetic pole surface 21 of the movable core 2 and the magnetic pole surface 31 of the yoke plate 3. In this embodiment, there are two block structures 5 with protrusions 510, and there are also two corresponding slide grooves 36 on the yoke plate 3.

[0115] The high voltage DC relay of the present invention includes a magnetic path portion that can improve the initial electromagnetic attraction force.

[0116] FIG. 27 shows a magnetic path portion and a high-voltage DC relay according to the present invention that can improve the initial electromagnetic attraction force. Curve 1 in the figure is the reaction force curve of the relay, Curve 2 is the attraction force curve of the prior art relay, and Curve 3 is the attraction force curve of the present invention. At the moment the relay is started, the magnetic gap is at its maximum, as shown on the right in FIG. 4 (i.e., 1.45 mm). At this time, assuming a driving voltage of 7 V is applied to the coil, the prior art would generate an electromagnetic attraction force (to the right of Curve 2 in FIG. 4). In the present invention, the provision of protruding member 50 shortens the magnetic gap, reducing the initial magnetic reluctance, improving the initial attraction force, and reducing startup power consumption. Although the driving voltage is still 7 V at this time, the generated electromagnetic attraction force is greater (to the right of Curve 3 in FIG. 4). As can be seen from FIG. 4, Curves 2 and 3 intersect at a magnetic gap of 0.35 mm. When the magnetic gap is between 1.45 mm and 0.35 mm, the electromagnetic attraction force of the present invention is greater than that of the prior art. When generating the same electromagnetic attractive force as in the prior art, only a smaller drive voltage is required, reducing drive power consumption. When the convex member 50 comes into contact with the magnetic pole face 21 of the movable iron core 2, the effect of the convex member 50 in improving the attractive force disappears, and since the two magnetic pole faces 21, 31 are close to each other at this time, the electromagnetic attractive force is large and the provision of the convex member 50 allows movement in the opposite direction. Therefore, the convex member 50 does not interfere with the movement of the magnetic poles until the iron core is completely closed, that is, until the magnetic pole face 21 of the movable iron core 2 is attracted to the magnetic pole face 31 of the yoke plate 3.

[0117] In the magnetic path portion and high-voltage DC relay of the present invention, which can improve the initial electromagnetic attraction force, a protruding member 50 is further provided in the magnetic path portion, and the protruding member 50 is slidably arranged at a position corresponding to the magnetic pole surface 31 of the yoke plate 3. When the movable core 2 is not moving, the protruding member 50 protrudes from the magnetic pole surface 31 of the yoke plate 3 toward the magnetic pole surface 21 of the movable core 2, and after the movable core 2 moves and brings the protruding member 50 of the yoke plate 3 into contact with the magnetic pole surface 21 of the movable core 2, the protruding member 50 moves in the opposite direction to the protrusion. In this configuration of the present invention, as a first aspect, by having the protruding member 50 protrude from the magnetic pole surface 31 of the yoke plate 3 toward the magnetic pole surface 21 of the movable core 2, the magnetic gap between the two magnetic pole surfaces 21, 31 is reduced at the position of the protruding member 50, thereby reducing magnetic resistance and improving initial electromagnetic attraction. Alternatively, the coil volume and power consumption can be reduced while maintaining the same initial electromagnetic attraction. The present invention uses the protruding member 50 to move in the opposite direction of the protrusion, thereby ensuring adhesion at a predetermined position between the two magnetic pole surfaces 21, 31. Another feature of the present invention is its simple structure. As a second aspect, during the adhesion process between the movable core 2 and the yoke plate 3, no clearance space is required; by providing a clearance space in the gap direction between the movable core 2 and the yoke plate 3, an attraction force of the movable core 2 toward the yoke plate 3 can be generated. As a third aspect, when the protruding height of the convex member needs to be designed in accordance with the matching of the attractive reaction force, since the convex member is movable, there is no need to replace the entire movable magnetic body (movable iron core) or the stationary magnetic body (yoke plate) at the design stage, thereby reducing design costs and processes.

[0118] Example 2 of the magnetic path portion that can improve the initial electromagnetic attraction force As shown in Figures 28 and 29, the magnetic path portion and high-voltage DC relay of the present invention that can improve the initial electromagnetic attraction force differ from Example 1 in that there are two stationary magnetic bodies, that is, in addition to the yoke plate 3, there is also a stationary iron core 7, the stationary iron core 7 is attached to the yoke plate 3, and the lower end surface of the stationary iron core 7 is aligned with the magnetic pole surface 21 of the movable iron core 2, that is, the lower end surface of the stationary iron core 7 is configured so that the magnetic pole surface 71 is aligned with the magnetic pole surface 21 of the movable iron core 2, and the convex member 50 is slidably arranged at a position corresponding to the magnetic pole surface 71 of the stationary iron core 7, the convex member 50 is not attached to the yoke plate 3, the stationary iron core 7 has a slide groove 72 and a step 73, the yoke plate 3 does not have a slide groove or step, the convex member 50 is aligned with the slide groove 72 of the stationary iron core 7, and the step 520 of the convex member 50 is aligned with the step 73 of the stationary iron core 7.

[0119] Example 3 of the magnetic path portion capable of improving the initial electromagnetic attraction force As shown in Figures 30 and 31, the magnetic path portion and high-voltage DC relay capable of improving the initial electromagnetic attraction force of the present invention differ from those of embodiment 2 in that the convex member 50 is not attached to the stationary iron core 7, but is slidably arranged at a position corresponding to the magnetic pole surface 21 of the movable iron core 2, the movable iron core 2 is provided with a slide groove 22 and a step 23, the stationary iron core 7 is not provided with a slide groove or a step, the convex member 50 is aligned with the slide groove 22 of the movable iron core 2, and the step 520 of the convex member 50 is aligned with the step 23 of the movable iron core 2.

[0120] In this embodiment, the movable iron core 2 is located at the bottom and the stationary iron core 7 is located at the top, so in order to prevent the convex member 50 from freely falling into the slide groove 22 of the movable iron core 2, a support spring 24 is further attached to the bottom end of the convex member 50, and a plug 25 for supporting the support spring 24 is further provided on the underside of the support spring 24.

[0121] Example 4 of the magnetic path portion capable of improving the initial electromagnetic attraction force As shown in Figures 32 and 33, the magnetic path portion and high-voltage DC relay of the present invention that can improve the initial electromagnetic attraction force differ from Example 1 in that the convex member 50 is slidably arranged at a position corresponding to the magnetic pole surface 21 of the movable core 2 rather than the yoke plate 3, the movable core 2 is provided with a slide groove 22 and a step 23, the yoke plate 3 is not provided with a slide groove or a step, the convex member 50 is aligned with the slide groove 22 of the movable core 2, and the step 520 of the convex member 50 is aligned with the step 23 of the movable core 2.

[0122] In this embodiment, the movable iron core 2 is located at the bottom and the yoke plate 3 is located at the top, so in order to prevent the convex member 50 from freely falling into the slide groove 22 of the movable iron core 2, a support spring 24 is further attached to the bottom end of the convex member 50, and a plug 25 for supporting the support spring 24 is further provided on the underside of the support spring 24.

[0123] Example 5 of the magnetic path portion that can improve the initial electromagnetic attraction force As shown in Figures 34 and 35, the magnetic path portion and high-voltage DC relay capable of improving the initial electromagnetic attraction force of the present invention differ from those of Example 2 in that the convex member is not a block structure with a protrusion, but rather the convex member 50 is an annular member, the annular member 8 is arranged slidably around the outer periphery of the stationary iron core 7, and one end 81 of the annular member 8 protrudes from the magnetic pole face 71 of the stationary iron core 7 in the direction of the magnetic pole face 21 of the movable iron core 2, and the stationary iron core 7 does not have a slide groove or step to fit into the block structure with a protrusion.

[0124] In this embodiment, a mating convex edge structure is provided between the other end of the annular member 8 and the outer periphery of the stationary iron core 7, and the convex edge structure includes an inner convex edge 82 provided at the other end of the annular member 8 and an outer convex edge 64 located close to the magnetic pole surface 71 of the stationary iron core 7. Through cooperation between the inner convex edge 82 of the annular member 8 and the outer convex edge 64 of the stationary iron core 7, the convex edge structure restricts movement of one end 81 of the annular member 8 toward the magnetic pole surface 21 of the movable iron core 2, ensuring that there is a certain gap between one end 81 of the annular member 8 and the magnetic pole surface 21 of the movable iron core 2 when the movable iron core 2 is not moving.

[0125] Sixth embodiment of the magnetic path portion capable of improving the initial electromagnetic attraction force As shown in Figures 36 and 37, the initial electromagnetic attraction force can be improved and the high voltage DC relay of the present invention is different from Example 1 in that the convex member 50 is not a block structure with a protrusion, but is an annular member, the annular member 8 is arranged slidably around the outer periphery of the movable iron core 2, and one end 81 of the annular member 8 protrudes from the magnetic pole surface 21 of the movable iron core 2 in the direction of the magnetic pole surface 31 of the yoke plate 3, and the yoke plate 3 does not have a slide groove or step to fit the block structure with a protrusion.

[0126] In this embodiment, a mating convex edge structure is provided between the other end of the annular member 8 and the outer periphery of the movable iron core 6, and the convex edge structure includes an inner convex edge 82 provided at the other end of the annular member 8 and the periphery 27 of the bottom end of the movable iron core 2. By cooperating with the inner convex edge 82 of the annular member 8 and the periphery 27 of the bottom end of the movable iron core 2, the convex edge structure restricts the movement of one end 81 of the annular member 8 toward the pole surface 31 of the yoke plate 3, ensuring that there is a constant gap between one end 81 of the annular member 8 and the pole surface 31 of the yoke plate 3 when the movable iron core 2 is not moving.

[0127] In this embodiment, the movable iron core 2 is located at the bottom and the yoke plate 3 is located at the top, so in order to prevent the annular member 8 from freely falling along the outer periphery of the movable iron core 2, a support spring 24 is further attached to the bottom end of the annular member 8, and a metal case 26 is provided on the underside of the support spring 24 to support the support spring 24.

[0128] It should be understood that the present invention is not limited in application to the detailed construction and arrangement of components proposed herein. The present invention can have other embodiments and can be realized and carried out in various ways. Such variations and modifications are within the scope of the present invention. The present invention as disclosed and defined herein should be understood to extend to all alternative combinations of two or more distinct features described or apparent in the text and / or drawings. All these different combinations constitute multiple alternative aspects of the invention. The embodiments described herein illustrate the best ways known for carrying out the invention and enable those skilled in the art to utilize the invention.

Claims

1. A magnetic path portion that can improve the initial electromagnetic attraction force, The magnetic path portion further includes a protruding member, which is slidably disposed at a position corresponding to the magnetic pole face of one of the two members, the movable magnetic body and the stationary magnetic body, and is configured such that the magnetic pole face of the movable magnetic body and the magnetic pole face of the stationary magnetic body are positioned opposite each other with a predetermined magnetic gap therebetween, and when the coil is energized, the movable magnetic body is attracted to the stationary magnetic body. The magnetic path portion further includes a protruding member, which is slidably disposed at a position corresponding to the magnetic pole face of one of the two members, the movable magnetic body and the stationary magnetic body. When the movable magnetic conductive body is not moving, the convex member protrudes from the magnetic pole face of one member toward the magnetic pole face of the other member, thereby reducing the magnetic gap between the magnetic pole faces of the two members at the position of the convex member, thereby reducing the magnetic resistance and improving the initial electromagnetic attraction force. After the movable magnetic conductive body moves and the convex member of one member abuts against the magnetic pole face of the other member, the convex member moves in the opposite direction of the protrusion, thereby ensuring attraction at a predetermined position between the magnetic pole faces of the two members. A magnetic path portion characterized by:

2. The convex member has a block structure with a protrusion, and a slide groove is provided at a location corresponding to the magnetic pole face of one of the two members, the movable magnetic conductive body and the stationary magnetic conductive body. The convex member of the block structure is slidably arranged in the slide groove of one of the two members, the movable magnetic conductive body and the stationary magnetic conductive body, and the protrusion of the convex member protrudes from the magnetic pole face of the one member toward the magnetic pole face of the other member. The magnetic path portion according to claim 1 .

3. A first staircase structure is provided between the protruding block structure and the slide groove, and the first staircase structure restricts movement of the protruding portion of the convex member toward the magnetic pole face of the other member, thereby ensuring that there is a certain gap between the protruding portion of the convex member of the one member and the magnetic pole face of the other member when the movable magnetic conductive body is not moving. The magnetic path portion according to claim 2 .

4. The number of the block structures with protrusions is one or more, and the number of slide grooves of one of the two members, the movable magnetic body and the stationary magnetic body, is one or more.

4. The magnetic path portion according to claim 2 or 3.

5. The convex member is an annular member, and the annular member is slidably disposed on the outer periphery of one of the two members, the movable magnetic conductive body and the stationary magnetic conductive body, and one end of the annular member protrudes from the magnetic pole face of the one member toward the magnetic pole face of the other member. The magnetic path portion according to claim 1 .

6. A mating projection structure is provided between the other end of the annular member and the outer periphery of one of the two members, the movable magnetic conductive body and the stationary magnetic conductive body, and the projection structure restricts the movement of one end of the annular member toward the magnetic pole face of the other member, and ensures that there is a certain gap between the one end of the annular member and the magnetic pole face of the other member when the movable magnetic conductive body is not moving. The magnetic path portion according to claim 5 .

7. The protruding member is slidably disposed on the movable magnetic conductive body, and the movable magnetic conductive body is a movable iron core.

7. The magnetic path portion according to claim 1, wherein the magnetic path portion is a magnetic path portion having a diameter of 100 mm or less.

8. The convex member is slidably disposed on the stationary magnetic conductive body, and the stationary magnetic conductive body is a yoke plate.

7. The magnetic path portion according to claim 1, wherein the magnetic path portion is a magnetic path portion having a diameter of 100 mm or less.

9. The protruding member is slidably disposed on the stationary magnetic conductive body, and the stationary magnetic conductive body is a stationary iron core.

7. The magnetic path portion according to claim 1, wherein the magnetic path portion is a magnetic path portion having a diameter of 100 mm or less.

10. The magnetic path portion capable of improving the initial electromagnetic attraction force according to any one of claims 1 to 3 and 5 to 6 is included. A high voltage DC relay characterized by:

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