Ceramic component, contact cavity and switching device

Abstract

The application relates to a ceramic part, a contact cavity and a switching device, the ceramic part being suitable for being connected with a metal part in the switching device, characterized in that the ceramic part comprises a side part and a protruding part, the side part is provided with an inner wall, an outer wall and an end face, the inner wall is arranged opposite to the outer wall, the end face is connected between the inner wall and the outer wall and is used for being welded with the metal part, the protruding part is protruded on the side part along the thickness direction of the wall of the side part, and at least part of the surface of the protruding part is adjacent to the end face. The ceramic part, the contact cavity and the switching device of the application strengthen the structural strength of the side part and reduce the cracking probability of the ceramic cover.

Description

Technical Field

[0001] This application relates to the field of switching device technology, and in particular to a ceramic component, a contact cavity, and a switching device. Background Technology

[0002] In switching devices such as relays and vacuum interrupters, the connection between ceramic and metal components is often involved. For example, in relays, a ceramic cover is typically welded to a metal frame to provide an installation environment for the contacts.

[0003] However, in the process of welding ceramic and metal together, the ceramic cover, as a ceramic component, is prone to cracking, which affects the reliability of the connection between the ceramic and metal components, and thus the reliability of the switching device. Utility Model Content

[0004] Therefore, it is necessary to provide a ceramic component, contact cavity, and switching device to address the issue of reducing the probability of cracking during the welding process of ceramic components.

[0005] On one hand, this application provides a ceramic component suitable for connection with a metal component in a switching device. The ceramic component includes a side portion and a protrusion. The side portion has an inner wall, an outer wall, and an end face. The inner wall and the outer wall are disposed opposite to each other. The end face is connected between the inner wall and the outer wall and is used for welding with the metal component. The protrusion protrudes from the side portion along the wall thickness direction, and at least a portion of the surface of the protrusion is adjacent to the end face.

[0006] In the ceramic component of this application, a protrusion is provided on the outer wall of the side portion, and at least a portion of the surface of the protrusion is adjacent to the end face, thereby strengthening the structural strength of the side portion by utilizing the position of the protrusion near the end face, making the side portion less prone to cracking.

[0007] Furthermore, the protrusion includes a first inclined surface adjacent to the end face. In this embodiment, when welding stress is transmitted to the first inclined surface, the first inclined surface can reduce stress concentration, thereby reducing the probability of cracking in the ceramic component and improving the sealing performance of the contact cavity.

[0008] Furthermore, the end face is a plane, and the angle between the first inclined surface and the end face ranges from 110° to 135°. In this embodiment, the angle between the first inclined surface and the end face is greater than or equal to 110°, thus providing a sufficiently large inclination angle to improve the uniform distribution of welding stress at the first inclined surface. This reduces the probability of stress concentration on the outer wall of the side near the end face, thereby reducing the likelihood of cracking in the ceramic component. Simultaneously, since the angle between the first inclined surface and the end face is less than or equal to 135°, it is easier to control the size of the protrusion in the wall thickness direction of the ceramic component within a suitable range, thus facilitating the miniaturization of the ceramic component.

[0009] Furthermore, the protrusion includes a second inclined surface, which is opposite to the first inclined surface in a direction away from the end face along the side portion. Thus, after welding stress is transferred to the first inclined surface, the first inclined surface can further transfer the welding stress to the second inclined surface, thereby using the second inclined surface to further weaken the welding stress and reduce the probability of stress concentration and cracking in the ceramic component.

[0010] Furthermore, the angle between the first inclined plane and the second inclined plane ranges from 45° to 145°. In this embodiment, by controlling the angle between the first inclined plane and the second inclined plane within the range of 45° to 145°, the overall structure of the protrusion is stabilized, which helps to reduce the probability of cracking.

[0011] Furthermore, the wall thickness of the side portion is T1, and the thickness of the protrusion along the wall thickness direction of the side portion is T2, where 1 / 3 ≤ T2 / T1 ≤ 1 / 2. In this embodiment, on the one hand, since 1 / 3 ≤ T2 / T1, the overall thickness of the ceramic component at the position corresponding to the protrusion is significantly increased for the side portion. Thus, the protrusion increases the structural strength of the ceramic component, making it less prone to cracking. On the other hand, since T2 / T1 ≤ 1 / 2, the protrusion does not protrude excessively from the outer wall of the side portion, which would be detrimental to the overall miniaturization design of the ceramic component. Therefore, in this embodiment, this structural arrangement can simultaneously achieve overall miniaturization of the ceramic component and improve its structural strength to reduce the probability of cracking.

[0012] Furthermore, the inner wall is provided with the protrusion; and / or, the outer wall is provided with the protrusion. In this embodiment, the protrusion strengthens the structural strength of the side portion, thereby reducing the probability of cracking in the ceramic component. When both the inner and outer walls of the side portion have protrusions, the protrusions on both the inner and outer walls can be used together to increase the structural strength of the side portion, further reducing the probability of cracking.

[0013] Furthermore, the protrusion includes a convex arc surface adjacent to the end face. In this embodiment, the convex arc surface can better disperse welding stress, thereby further reducing the probability of side cracking.

[0014] On the other hand, this application provides a contact cavity comprising a metal component and a ceramic component as described above, wherein the metal component is welded to the side portion of the ceramic component. In this embodiment, when the metal component is welded to the side portion of the ceramic component, a protrusion at a position adjacent to the end face can be used to strengthen the structural strength of the side portion, making it less prone to cracking.

[0015] Furthermore, the metal component and the ceramic component are brazed together. In this embodiment, the brazing of the metal component and the ceramic component improves the sealing performance between them.

[0016] Furthermore, this application provides a switching device including the contact cavity described above. In this switching device, when the metal component is welded to the side of the ceramic component, the protrusion at the position adjacent to the end face can be used to strengthen the structural strength of the side, making the side less prone to cracking.

[0017] Furthermore, the switching device is a relay, the ceramic component is the ceramic cover of the relay, and the metal component is the metal frame of the relay. In this embodiment, when the ceramic cover of the relay is welded to the metal frame, the protrusions at the adjacent end face can be used to strengthen the structural strength of the side, making the side less prone to cracking.

[0018] Furthermore, the metal frame is sealed and welded to the side panel. Since the ceramic cover is less prone to cracking, this improves the seal between the metal frame and the side panel.

[0019] Furthermore, the relay includes at least two stationary contacts, each mounted on the ceramic cover, with one end of each stationary contact protruding from the inner surface of the ceramic cover and the other end protruding from the outer surface of the ceramic cover. Because the two ends of the stationary contacts protrude from the inner and outer surfaces of the ceramic cover respectively, the stationary contacts can accommodate the needs of the relay's moving contact for electrical connection to external circuits.

[0020] Furthermore, the ceramic cover has a first through hole and a second through hole on the side facing away from the metal frame. The stationary contact includes a first stationary contact and a second stationary contact. The first stationary contact passes through the first through hole, and the second stationary contact passes through the second through hole. Both the first and second stationary contacts are sealed and welded to the ceramic cover. This structural arrangement provides a sealed environment for the parts of the first stationary contact, the second stationary contact, and the moving contact of the relay, using the ceramic cover. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a relay in one embodiment.

[0022] Figure 2 This is a partial structural cross-sectional view of a relay in one embodiment.

[0023] Figure 3 This is a schematic diagram of the contact cavity of a relay in one embodiment.

[0024] Figure 4 This is a schematic diagram of the exploded structure of the contact cavity of a relay in one embodiment.

[0025] Figure 5 This is a cross-sectional structural diagram of the contact cavity of a relay in one embodiment.

[0026] Figure 6 In one implementation, the relay corresponds to Figure 5 A magnified view of the structure within the middle circle.

[0027] Figure 7 In another embodiment, the corresponding relay Figure 5 A magnified view of the structure within the middle circle.

[0028] Figure label:

[0029] 100. Relay;

[0030] 10. Contact part; 11. First stationary contact; 12. Second stationary contact; 13. Moving contact piece;

[0031] 20. Actuating mechanism; 21. Actuating seat; 22. Actuating lever;

[0032] 30. Magnetic circuit section; 31. Coil assembly; 311. Coil; 312. Coil frame; 32. Moving iron core; 33. Stationary magnetic conductor; 331. Yoke plate; 331a. Perforation; 332. Stationary iron core; 34. Return spring; 35. U-shaped yoke;

[0033] 40. Contact cavity; 41. Ceramic cover; 41a. First through hole; 41b. Second through hole; 411. Side; 411a. End face; 411b. Outer wall; 411c. Inner wall; 412. Protrusion; 412a. First inclined surface; 412b. Second inclined surface; 42. Metal frame; 421. Annular body; 422. Folded edge;

[0034] 50. Metal casing. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0041] For switching devices such as relays and vacuum interrupters, the connection between ceramic and metal components is often involved. The inventors have discovered that during the welding process between ceramic and metal components, the ceramic component is prone to cracking due to temperature variations, thus affecting the reliability of the switching device. This is especially true when the ceramic and metal components are sealed together to provide a sealed environment for inert gas to protect the electrical contacts of the switching device; cracking of the ceramic component can compromise the seal, causing leakage and consequently affecting the reliability of the switching device.

[0042] In response, the inventors discovered through research that the most common locations for cracking in ceramic components are concentrated at the edges and where the ceramic component joins with the metal component. To address this, the inventors proposed relevant technical measures to resolve the cracking problem at at least one of these locations, thereby reducing the likelihood of cracking in the ceramic component affecting the reliability of the switching device.

[0043] For ease of understanding, the following explanation will use a relay as an example. Similarly, the technical solutions for solving the problem of cracking of ceramic components during the welding process in other switching devices such as vacuum interrupters can also refer to the relay technical solutions below.

[0044] Combination Figure 1 and Figure 2 As shown, this application provides a relay 100 that can be applied in an automatic control circuit. The relay 100 includes a contact portion 10, an actuating mechanism 20, and a magnetic circuit portion 30.

[0045] The contact portion 10 includes stationary contacts and a moving contact 13. There can be two stationary contacts, namely a first stationary contact 11 and a second stationary contact 12. The two ends of the moving contact 13 correspond to the two stationary contacts (i.e., the first stationary contact 11 and the second stationary contact 12). The moving contact 13 can move closer to or further away from the two stationary contacts under the action of the pushing mechanism 20. When the moving contact 13 approaches and contacts the two stationary contacts, that is, when the moving contact 13 contacts the first stationary contact 11 and the second stationary contact 12, the first stationary contact 11 is electrically connected to the second stationary contact 12 through the moving contact 13, thereby completing the output circuit. Conversely, when the moving contact 13 separates from the two stationary contacts, the moving contact 13 disconnects the electrical connection between the first stationary contact 11 and the second stationary contact 12, thereby disconnecting the output circuit.

[0046] The number of stationary contacts can also be two or more; there is no limit to the number of stationary contacts.

[0047] In this embodiment, the relay 100 includes a contact cavity 40, which provides a sealed environment for the contact portion 10. The contact cavity 40 includes a ceramic component (such as a ceramic cover 41) and a metal component (such as a metal frame 42). In other embodiments, the ceramic component is not limited to the ceramic cover 41, and may also be other ceramic structural components in the switching device; the metal component is not limited to the metal frame 42, and may also be other metal components in the switching device.

[0048] For ease of understanding, the following description will take the contact cavity 40, which includes a ceramic cover 41 and a metal frame 42, as an example to further illustrate the contact cavity 40.

[0049] Combination Figure 3 and Figure 4 As shown, the contact cavity 40 includes a ceramic cover 41 and a metal frame 42, with the ceramic cover 41 connected to the metal frame 42. In some embodiments, the ceramic cover 41 and the metal frame 42 can be sealed together. For example, in some embodiments, the ceramic cover 41 and the metal frame 42 are brazed together to improve the sealing performance between them.

[0050] Combination Figure 5 and Figure 6 As shown, the ceramic cover 41 includes a side portion 411 and a protrusion 412. The side portion 411 has an end face 411a, an outer wall 411b, and an inner wall 411c. The inner wall 411c is disposed opposite to the outer wall 411b, and the end face 411a is connected between the inner wall 411c and the outer wall 411b and is used for welding to the metal frame 42.

[0051] It should be noted that the ceramic cover 41, as a cover structure, has an open end and a closed end. For example, in some embodiments, the ceramic cover 41 includes a top connected to the side portion 411, and in this embodiment, the end face 411a is the surface of the side portion 411 at the end farther from the top.

[0052] In some embodiments, the side portion 411 of the ceramic component may not be connected to the top. The side portion 411 is a cylindrical structure with an inner wall 411c and an outer wall 411b. Both ends of the side portion 411 have end faces 411a, so that corresponding metal components can be connected to the end faces 411a of the two ends of the side portion 411 respectively.

[0053] Continue to combine Figure 5 and Figure 6 As shown, in some embodiments, the protrusion 412 protrudes from the outer wall 411b of the side portion 411, and at least a portion of the surface of the protrusion 412 is adjacent to the end face 411a, thereby strengthening the structural strength of the side portion 411 by means of the protrusion 412 at the position adjacent to the end face 411a, making the side portion 411 less prone to cracking.

[0054] It should be noted that in the embodiment where the metal frame 42 is sealed and welded to the end face 411a of the connecting end 411, the protrusion 412 strengthens the structural strength of the side portion 411, thereby reducing the probability of cracking of the ceramic cover 41. Therefore, the protrusion 412 helps to maintain the sealing performance of the contact cavity 40.

[0055] The metal frame 42 includes an annular body 421, which is sealed and welded to the end face 411a of the side portion 411. The protrusion 412 includes a first inclined surface 412a, which is adjacent to the end face 411a of the side portion 411. Thus, when the welding stress generated during the sealing and welding process between the annular body 421 and the end face 411a of the side portion 411 is transferred to the first inclined surface 412a, the first inclined surface 412a can reduce stress concentration, thereby reducing the probability of cracking of the ceramic cover 41, which helps to improve the sealing performance of the contact cavity 40.

[0056] Combination Figure 7As shown, in some embodiments, the wall thickness of the side portion 411 is T1, and the thickness of the protrusion 412 along the wall thickness direction of the side portion 411 is T2, where 1 / 3 ≤ T2 / T1 ≤ 1 / 2. In this embodiment, on the one hand, since 1 / 3 ≤ T2 / T1, the overall thickness of the ceramic cover 41 at the position corresponding to the protrusion 412 is significantly increased for the side portion 411. Thus, the protrusion 412 increases the structural strength of the ceramic cover 41, making it less prone to cracking. On the other hand, since T2 / T1 ≤ 1 / 2, the protrusion 412 does not protrude excessively relative to the outer wall 411b of the side portion 411, which would be detrimental to the overall miniaturization design of the ceramic cover 41. Therefore, in this embodiment, this structural arrangement can simultaneously achieve overall miniaturization of the ceramic cover 41 and improve its structural strength to reduce the probability of cracking.

[0057] Combination Figure 7 As shown, at the end face 411a of the side portion 411, the distance from the annular body 421 along the wall thickness direction of the side portion 411 to the outer wall 411b of the side portion 411 is D1, and the distance from the annular body 421 along the wall thickness direction of the side portion 411 to the inner wall 411c of the side portion 411 is D2, 1 / 3≤D1 / T1≤1 / 2, 1 / 3≤D2 / T1≤1 / 2. With this structural arrangement, the welding position of the annular body 421 at the end face 411a of the side portion 411 is neither too close to the outer wall 411b of the side portion 411 nor too close to the inner wall 411c of the side portion 411. This helps to reduce the concentration of welding stress between the annular body 421 and the side portion 411 at the outer wall 411b and inner wall 411c of the side portion 411, thereby reducing the probability of cracking of the outer wall 411b and inner wall 411c of the side portion 411 near the end face 411a.

[0058] Furthermore, 0.5mm ≤ D1 ≤ 1.2mm. For example, D1 can be 0.5mm, 0.7mm, 0.8mm, 0.9mm, 1mm, or 1.2mm. 0.5mm ≤ D2 ≤ 1.2mm. For example, D2 can be 0.5mm, 0.7mm, 0.8mm, 0.9mm, 1mm, or 1.2mm.

[0059] In the above embodiment, since 0.5mm≤D1≤1.2mm and 0.5mm≤D2≤1.2mm, the distance from the annular body 421 to the outer wall 411b and inner wall 411c of the side portion 411 is appropriate. This helps to reduce the concentration of welding stress between the annular body 421 and the side portion 411 at the outer wall 411b and inner wall 411c of the side portion 411, thereby reducing the probability of cracking of the outer wall 411b and inner wall 411c of the side portion 411 near the end face 411a.

[0060] The values ​​of D1 and D2 are not restricted here.

[0061] In some embodiments, 0.5mm ≤ D1 < D2 ≤ 1.2mm. This balances 0.5mm ≤ D1 ≤ 1.2mm and 0.5mm ≤ D2 ≤ 1.2mm, making it less prone to cracking on the outer wall 411b and inner wall 411c of the side portion 411 near the end face 411a. Furthermore, since D1 < D2, the distance from the annular body 421 to the inner wall 411c of the side portion 411 is greater than the distance from the annular body 421 to the outer wall 411b of the side portion 411. Because the welding stress gradually weakens during transmission, when the welding stress is transmitted from the welding position between the annular body 421 and the side portion 411 to the outer wall 411b and inner wall 411c of the side portion 411, the welding stress transmitted to the inner wall 411c of the side portion 411 is less than the welding stress transmitted to the outer wall 411b of the side portion 411, making it less prone to cracking on the inner wall 411c of the side portion 411. Since the outer wall 411b of the side portion 411 is provided with a protrusion 412, and the first inclined surface 412a of the protrusion 412 is adjacent to the end face 411a of the side portion 411, even if the welding stress on the outer wall 411b of the side portion 411 is greater than the welding stress on the inner wall 411c of the side portion 411, the outer wall 411b of the side portion 411 is not prone to cracking due to the reinforcing effect of the protrusion 412 on the side portion 411 and the stress dispersion effect of the first inclined surface 412a.

[0062] It should be noted that, for the first inclined surface 412a, its inclination angle will affect the force dispersion effect on the one hand, and on the other hand, it will affect the increase of the wall thickness of the protrusion 412 on the ceramic cover 41, thereby affecting the overall miniaturization of the ceramic cover 41.

[0063] Based on this, in some embodiments of this application, the included angle α between the first inclined surface 412a and the end face 411a of the side portion 411 ranges from 110° to 135°, that is, 110°≤α≤135°. α can be 110°, 115°, 120°, 125°, 130° or 135°, and is not limited here.

[0064] Since 110°≤α, the first inclined surface 412a has a sufficiently large tilt angle to improve the uniform distribution of welding stress at the first inclined surface 412a, thereby reducing the probability of stress concentration at the position of the outer wall 411b of the side 411 near the end face 411a, and thus reducing the probability of cracking of the ceramic cover 41.

[0065] Meanwhile, since α ≤ 135°, the dimensions of the protrusion 412 in the wall thickness direction of the ceramic cover 41 are controlled within a suitable range, thereby maintaining the miniaturization of the ceramic cover 41. For example, in some embodiments, the thickness T2 of the protrusion 412 along the wall thickness direction of the side portion 411 satisfies: 0.5mm ≤ T2 ≤ 0.9mm. T2 can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, or 0.9mm, and is not limited here.

[0066] Combination Figure 6 and Figure 7 As shown, in some embodiments, the protrusion 412 includes a second inclined surface 412b, which is opposite to the first inclined surface 412a in a direction away from the end face 411a along the side portion 411. Thus, after welding stress is transmitted to the first inclined surface 412a, the first inclined surface 412a can further transmit the welding stress to the second inclined surface 412b, thereby using the second inclined surface 412b to further weaken the welding stress and reduce the probability of stress concentration and cracking in the ceramic cover 41.

[0067] Furthermore, the included angle β between the first inclined plane 412a and the second inclined plane 412b ranges from 45° to 145°, that is, 45°≤β≤145°. β can be 45°, 50°, 65°, 75°, 85°, 90°, 95°, 110°, 125°, 135° or 145°, and is not limited here.

[0068] In this embodiment, by controlling the included angle β between the first inclined surface 412a and the second inclined surface 412b within the range of 45° to 145°, the overall structure of the protrusion 412 is stabilized, which helps to reduce the probability of cracking.

[0069] In some embodiments, the included angle γ between the second inclined surface 412b and the outer wall 411b of the side portion 411 ranges from 115° to 165°, that is, 115° ≤ γ ≤ 165°. γ can be 115°, 125°, 135°, 145°, 150°, 155°, 160° or 165°, and is not limited here.

[0070] In this embodiment, by controlling the included angle γ between the second inclined surface 412b and the outer wall 411b of the side portion 411 within the range of 115° to 165°, the overall structure of the protrusion 412 is stabilized, which helps to reduce the probability of cracking.

[0071] In some embodiments, the protrusion 412 may be a protrusion on the inner wall 411c of the side portion 411. Since at least a portion of the surface of the protrusion 412 is adjacent to the end face 411a, the protrusion 412 in this embodiment can still increase the structural strength of the side portion 411 at a position near the end face 411a, thereby reducing the probability of cracking in the side portion 411.

[0072] It should be noted that both the inner wall 411c and the outer wall 411b of the side portion 411 can be provided with protrusions 412. That is, the inner wall 411c of the side portion 411 is provided with protrusions 412, and the outer wall 411b of the side portion 411 is also provided with protrusions 412. In this way, the protrusions 412 on the inner wall 411c and the outer wall 411b together increase the structural strength of the side portion 411, thereby further reducing the probability of cracking in the side portion 411.

[0073] In some embodiments, the surface of the protrusion 412 adjacent to the end face 411a is not limited to a plane. For example, the first inclined surface 412a can be replaced by a surface of other shapes. For example, the protrusion 412 includes a convex arc surface adjacent to the end face 411a. In this way, by using a convex arc surface instead of the first inclined surface 412a, the convex arc surface can better disperse welding stress, thereby further reducing the probability of cracking in the side portion 411.

[0074] It should be noted that the parts of relay 100 not covered may be the same as or may be implemented using existing technology, and are not limited here.

[0075] For example, in some implementations, it is combined again. Figure 2 As shown, the pushing mechanism 20 includes a pushing base 21 and a pushing rod 22 connected to each other. The moving contact 13 is disposed on the pushing base 21. The pushing rod 22 is used to drive the pushing base 21 to move closer to or away from the stationary contact when it moves, so that the moving contact 13 on the pushing base 21 comes into contact with or separates from the stationary contact, thereby achieving the purpose of electrically connecting or disconnecting the moving contact 13 from the stationary contact, so as to meet the need to connect or disconnect the automatic control circuit connected to the relay 100.

[0076] Combination Figure 1 and Figure 2 As shown, the magnetic circuit part 30 includes a coil assembly 31, a moving iron core 32, and a stationary conductor magnet 33.

[0077] The coil assembly 31 includes a coil 311 and a coil frame 312. The coil 311 generates an electromagnetic field when energized. The coil frame 312 has a mounting hole. The moving iron core 32 is disposed within the mounting hole and connected to the end of the push rod 22 away from the push base 21. A stationary magnet 33 is attracted to the electromagnetic field generated by the energized coil 311, thereby enabling the moving iron core 32 to move within the mounting hole in a direction close to the stationary magnet 33.

[0078] In some embodiments, the stationary magnet 33 includes a yoke plate 331.

[0079] In some embodiments, the stationary magnet 33 includes a yoke plate 331 and a stationary iron core 332 disposed on the yoke plate 331. The structure of the stationary magnet 33 is not limited here, as long as the moving iron core 32 can magnetically attract the stationary magnet 33 when the coil 311 is energized, so as to drive the moving contact 13 to contact or separate from the stationary contact.

[0080] It should be noted that the stationary magnet 33 is located between the moving iron core 32 and the contact portion 10. Since the contact cavity 40 of the relay 100 provides a sealed environment for the contact portion 10, the contact cavity 40 can be located on the side of the stationary magnet 33 facing away from the moving iron core 32.

[0081] Taking the static conductor 33 including the yoke plate 331 as an example, the ceramic cover 41 is sealed to the side of the yoke plate 331 facing away from the moving iron core 32 by the metal frame 42. That is, one end of the metal frame 42 is sealed to the end face 411a of the side 411, and the other end is sealed to the yoke plate 331.

[0082] It should be noted that after the ceramic cover 41 is connected to the side of the yoke plate 331 facing away from the moving iron core 32 via the metal frame 42, the ceramic cover 41, the metal frame 42, and the yoke plate 331 together enclose and form a sealed space for the contact portion 10. Relative to the overall structure of the relay 100, this sealed space refers to the sealed environment of the contact portion 10 between the moving contact piece 13 and the two stationary contacts within the contact cavity 40. For the contact cavity 40 itself, the components of the contact cavity 40 are sealed together, and the other structures of the relay 100 are sealed together with the structure of the contact cavity 40. Thus, good sealing is achieved both between the structures of the contact cavity 40 itself and between the contact cavity 40 and the surrounding structural components, thereby enabling the relay 100 as a whole to provide a good sealed environment for the contact portion 10.

[0083] It should be noted that the end face 411a of the side portion 411 is in a closed ring shape, thus the ceramic cover 41 encloses and forms a space for receiving the contact portion 10. The annular body 421 serves as a structural member connected to the side portion 411, and is also annular in shape to ensure a sealed connection with the ceramic cover 41. It should be noted that the annular body 421 can be a smooth cylindrical structure, or it can consist of multiple cylindrical structures of different sizes, which can be connected by bends. The shape of the annular body 421 is not limited here, as long as it meets the requirements for a sealed connection with the side portion 411.

[0084] The stationary contacts are all mounted on the ceramic cover 41, with one end of each stationary contact protruding from the inner surface of the ceramic cover 41 and the other end protruding from the outer surface of the ceramic cover 41, so that the stationary contacts can meet the needs of the moving contact 13 to electrically connect to the external circuit.

[0085] like Figures 3 to 5 As shown, in some embodiments, a first through hole 41a and a second through hole 41b are provided on the side of the ceramic cover 41 facing away from the metal frame 42 (i.e., the top of the ceramic cover 41). A first stationary contact 11 passes through the first through hole 41a, and a second stationary contact 12 passes through the second through hole 41b. Both the first stationary contact 11 and the second stationary contact 12 are sealed and welded to the ceramic cover 41 so as to provide a sealed environment for the parts of the first stationary contact 11, the second stationary contact 12 and the moving contact piece 13 that come into contact using the contact cavity 40.

[0086] It should be noted that, since the first stationary contact 11 passes through the first through hole 41a and the second stationary contact 12 passes through the second through hole 41b, the first stationary contact 11 and the second stationary contact 12 can form electrical terminals on the outside of the ceramic cover 41, thereby meeting the connection requirements between the output circuit and the external controlled object. Simultaneously, the first stationary contact 11 and the second stationary contact 12 respectively penetrate from the first through hole 41a and the second through hole 41b into the interior of the ceramic cover 41, so as to correspond to the moving contact piece 13 located inside the ceramic cover 41. Since both the first stationary contact 11 and the second stationary contact 12 are sealed and welded to the ceramic cover 41, the contact portion 10 is in a sealed environment.

[0087] Combination Figure 2 and Figure 3 As shown, in some embodiments, the metal frame 42 includes a flange 422. The flange 422 is connected to one end of the annular body 421 facing away from the ceramic cover 41 and is bent outward relative to the annular body 421. The flange 422 is sealed and welded to the yoke plate 331. The flange 422 can increase the connection area between the metal frame 42 and the yoke plate 331, thereby improving the welding sealing performance.

[0088] Continue reading Figure 2 As shown, in some embodiments, the movable contact 13 and the push seat 21 are connected, and both are disposed within the ceramic cover 41. The yoke plate 331 has a through hole 331a through which the push rod 22 can pass. Specifically, one end of the push rod 22 is connected to the push seat 21, and the other end passes through the through hole 331a through the yoke plate 331 to connect with the movable iron core 32. In this embodiment, the push rod 22 passes through the through hole 331a of the yoke plate 331, and the push seat 21 and the movable iron core 32, which are connected to both ends of the push rod 22, are located on both sides of the yoke plate 331.

[0089] Since the push rod 22 passes through the through hole 331a and is connected between the push seat 21 and the moving iron core 32, the push rod 22 can transmit the power of the moving iron core 32 moving in the mounting hole of the coil frame 312 to the push seat 21, so that the push seat 21, with the moving contact piece 13, comes into contact with or separates from the two stationary contacts.

[0090] Continue reading Figure 2 As shown, in some embodiments, the relay 100 further includes a metal housing 50, which is a bottomed cylindrical shape. The open end of the metal housing 50 is sealed to the side of the yoke plate 331 facing away from the contact cavity 40. The perforation 331a on the yoke plate 331 corresponds to the interior of the metal housing 50, thereby sealing the area around the perforation 331a with the metal housing 50. Thus, even if the contact cavity 40 is connected to the space on the other side of the yoke plate 331 through the perforation 331a, with the metal housing 50 sealing the area around the perforation 331a, the space enclosed by the contact cavity 40 is connected to the space enclosed by the metal housing 50 through the perforation 331a, and the overall system exhibits good sealing performance.

[0091] The sealing connection between the metal shell 50 and the yoke plate 331 includes, but is not limited to, welding or glue connection.

[0092] It should be noted that, based on the fact that the push rod 22 passes through the through hole 331a, the metal shell 50 seals the area around the through hole 331a, and thus the end of the push rod 22 connected to the moving iron core 32 and the moving iron core 32 are both located inside the metal shell 50. In some embodiments, the metal shell 50 not only serves a sealing function, but can also guide the movement of the moving iron core 32 to improve the movement stability of the moving iron core 32. For example, the peripheral sidewall of the moving iron core 32 slides in contact with the inner wall of the metal shell 50, so that the moving iron core 32 is less likely to wobble in the direction perpendicular to the push rod 22 when it moves, thereby improving the movement stability.

[0093] In an embodiment where the relay 100 includes a metal housing 50, at least a portion of the structure of the metal housing 50 is located within the mounting hole of the coil frame 312. That is, after the coil 311 is wound around the coil frame 312, it is fitted together with the coil frame 312 onto the outside of the metal housing 50, allowing the coil 311 to magnetize the moving iron core 32 located within the metal housing 50 when energized. Alternatively, in an embodiment where the stationary magnet 33 includes a stationary iron core 332, the magnetic lines of force generated by the energized coil 311 can also be transmitted to the stationary iron core 332 via the yoke plate 331, causing the moving iron core 32 to magnetically attract the stationary iron core 332. This, in turn, drives the push rod 22 to move the push seat 21 toward the side where the first stationary contact 11 and the second stationary contact 12 are located. Subsequently, the moving contact piece 13 contacts the first stationary contact 11 and the second stationary contact 12, electrically connecting the first stationary contact 11 and the second stationary contact 12 using the moving contact piece 13.

[0094] Continue reading Figure 2 As shown, in some embodiments, a return spring 34 is provided between the yoke plate 331 and the moving iron core 32.

[0095] In this embodiment, when the coil 311 is energized, the moving iron core 32 attracts the yoke plate 331 in the electromagnetic field generated by the coil 311, thereby overcoming the elastic force of the return spring 34 and moving towards the yoke plate 331. In this way, the push rod 22 drives the push seat 21 to move towards the stationary contacts, causing the moving contact piece 13 on the push seat 21 to contact the two stationary contacts, thus establishing an electrical connection between the two stationary contacts using the moving contact piece 13.

[0096] When the coil 311 is de-energized, the moving iron core 32 moves away from the yoke plate 331 under the drive of the return spring 34. In this way, the moving iron core 32 moves the push seat 21 away from the stationary contact via the push rod 22, so that the moving contact piece 13 separates from the two stationary contacts, thereby breaking the electrical contact.

[0097] Thus, the opening and closing of the relay 100 can be controlled by energizing the coil 311, so that the relay 100 can conduct or disconnect the automatic control circuit to which it is connected. That is, the relay 100 plays the role of a "switch" in the automatic control circuit.

[0098] See again Figure 1 As shown, in some embodiments, the magnetic circuit portion 30 further includes a U-shaped yoke 35. A yoke plate 331 is connected to both ends of the U-shaped yoke 35 to enclose and form an installation space. A coil 311 is disposed within this installation space. In this embodiment, the pusher seat 21 is located on the side of the yoke plate 331 facing away from the moving iron core 32. The end of the push rod 22 furthest from the moving contact 13 passes through the yoke plate 331 and is connected to the moving iron core 32.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A ceramic component suitable for connection with a metal component in a switching device, characterized in that, The ceramic component includes a side portion and a protrusion. The side portion has an inner wall, an outer wall, and an end face. The inner wall and the outer wall are disposed opposite to each other. The end face is connected between the inner wall and the outer wall and is used for welding to the metal component. The protrusion protrudes from the side portion along the wall thickness direction, and at least a portion of the surface of the protrusion is adjacent to the end face.

2. The ceramic component according to claim 1, characterized in that, The protrusion includes a first inclined surface adjacent to the end face.

3. The ceramic component according to claim 2, characterized in that, The end face is a plane, and the angle between the first inclined plane and the end face ranges from 110° to 135°.

4. The ceramic component according to claim 2, characterized in that, The protrusion includes a second inclined surface, which is opposite to the first inclined surface in a direction away from the end face along the side portion.

5. The ceramic component according to claim 4, characterized in that, The angle between the first inclined plane and the second inclined plane ranges from 45° to 145°.

6. The ceramic component according to any one of claims 1-5, characterized in that, The wall thickness of the side portion is T1, and the thickness of the protrusion along the wall thickness direction of the side portion is T2, where 1 / 3 ≤ T2 / T1 ≤ 1 / 2.

7. The ceramic component according to any one of claims 1-5, characterized in that, The inner wall is provided with the protrusion; And / or, the outer wall is provided with the protrusion.

8. The ceramic component according to claim 1, characterized in that, The protrusion includes a convex arc surface, which is adjacent to the end face.

9. A contact cavity, characterized in that, The contact cavity includes a metal component and a ceramic component as described in any one of claims 1-8, wherein the metal component is welded to the side portion of the ceramic component.

10. The contact cavity according to claim 9, characterized in that, The metal component and the ceramic component are brazed together.

11. A switching device, characterized in that, The switching device has a contact cavity as described in claim 9 or 10.

12. The switching device according to claim 11, characterized in that, The switching device is a relay, the ceramic component is the ceramic cover of the relay, and the metal component is the metal frame of the relay.

13. The switching device according to claim 12, characterized in that, The metal frame is sealed and welded to the side.

14. The switching device according to claim 12 or 13, characterized in that, The metal frame includes an annular body, which is sealed and welded to the side portion.

15. The switching device according to claim 14, characterized in that, The relay includes at least two stationary contacts, each of which is mounted on the ceramic cover. One end of each stationary contact protrudes from the inner surface of the ceramic cover, and the other end protrudes from the outer surface of the ceramic cover.

16. The switching device according to claim 15, characterized in that, The ceramic cover has a first through hole and a second through hole on the side opposite to the metal frame. The stationary contact includes a first stationary contact and a second stationary contact. The first stationary contact passes through the first through hole, and the second stationary contact passes through the second through hole. Both the first stationary contact and the second stationary contact are sealed and welded to the ceramic cover.

Images