Magnetic circuit portion and relay

Abstract

The application relates to the technical field of electronic control devices, in particular to a coil frame, a magnetic circuit part and a relay. The coil frame comprises a coil frame body and a magnetic isolation part, the coil frame body is provided with a mounting position for mounting an iron core, the magnetic isolation part is connected with the coil frame body, and the magnetic isolation part is used for contacting with an armature so as to separate the mutually close surfaces of the armature and the iron core. By connecting the magnetic isolation part with the coil frame, the process of welding the existing magnetic isolation sheet on the iron core is cancelled, virtual welding, welding through and welding slag foreign matters are avoided, and the quality of the relay is guaranteed to be reliable. When the armature rotates to a stable state, the armature contacts the magnetic isolation part due to the existence of the magnetic isolation part, so that the mutually close surfaces of the iron core and the armature are separated, electromagnetic resultant force is reduced, and the relay can be normally released.

Description

Technical Field

[0001] This invention relates to the field of electronic control device technology, and more specifically, to a coil frame, a magnetic circuit part, and a relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] A relay includes a coil frame with an iron core mounted on it. To weaken the attraction when the iron parts overlap and reduce drastic changes in attraction caused by variations in the overlap surface, the armature needs to be physically separated from the iron core. In related technologies, a magnetic shielding sheet, typically made of stainless steel, is welded onto the contact surface of the iron core. During welding, a fixture is used to pick up the magnetic shielding sheet one by one and place it on the contact surface of the iron core before welding. The entire process is very complex. In practice, the magnetic shielding sheet lacks positioning features when being picked up and placed on the iron core surface, making it prone to tilting or even falling off, leading to incomplete welding. Furthermore, welding can easily result in weak welds, burn-through, and the formation of weld slag and foreign matter, ultimately causing the relay to malfunction. Summary of the Invention

[0004] This invention provides a coil frame, a magnetic circuit component, and a relay to alleviate the technical problem of complex welding processes for magnetic shielding sheets in the prior art.

[0005] The coil frame provided in this embodiment of the invention includes a coil frame body and a magnetic shielding part. The coil frame body is provided with a mounting position for mounting an iron core. The magnetic shielding part is connected to the coil frame body and is used to contact the armature so as to separate the close-to-each surfaces of the armature and the iron core.

[0006] According to some embodiments of the present invention, the magnetic shielding part is integrally formed with the coil frame body.

[0007] According to some embodiments of the present invention, the magnetic shielding part is directly connected to the coil frame body, and / or the magnetic shielding part is made of plastic.

[0008] According to some embodiments of the present invention, the magnetic shielding part and the coil frame body are integrally formed by injection molding.

[0009] The magnetic circuit portion provided in this embodiment of the invention includes an iron core, an armature, and the coil frame. The iron core is located at the mounting position of the coil frame body. At least a portion of the magnetic shielding part protrudes from the attraction surface of the iron core, so that the armature is separated from the attraction surface of the iron core by the magnetic shielding part.

[0010] According to some embodiments of the present invention, the magnetic shielding part is located on the side of the magnetic attraction surface of the iron core facing the armature.

[0011] According to some embodiments of the present invention, the contact surface of the iron core is provided with a first recess, and a reinforcing portion is provided in the first recess, wherein the reinforcing portion and the magnetic shielding portion are integrally formed.

[0012] According to some embodiments of the present invention, the magnetic core has a first protrusion on its attraction surface, and the first protrusion covers the magnetic shielding portion.

[0013] According to some embodiments of the present invention, the iron core has a first attraction surface and a second attraction surface disposed opposite to each other, the recess includes a first sub-recess disposed on the first attraction surface and a second sub-recess disposed on the second attraction surface; the reinforcing portion includes a first reinforcing portion disposed in the first sub-recess and a second reinforcing portion disposed in the second sub-recess; The magnetic shielding part includes a first sub-magnetic shielding part and a second sub-magnetic shielding part. The first sub-magnetic shielding part is located on the first attraction surface and is integrally formed with the first reinforcing part. The second sub-magnetic shielding part is located on the second attraction surface and is integrally formed with the second reinforcing part.

[0014] According to some embodiments of the present invention, the first sub-recessed portion and the second sub-recessed portion are connected to form a through hole penetrating the first and second attraction surfaces; the first sub-magnetic shielding portion, the second sub-magnetic shielding portion and the reinforcing portion are integrally formed.

[0015] According to some embodiments of the present invention, the iron core has a first attraction surface and a second attraction surface disposed opposite to each other, and the first protrusion includes a first sub-protrusion located on the first attraction surface and a second sub-protrusion located on the second attraction surface; The magnetic shielding part includes a first sub-magnetic shielding part and a second sub-magnetic shielding part, wherein the first sub-protrusion covers the first sub-magnetic shielding part and the second sub-protrusion covers the second sub-magnetic shielding part.

[0016] According to some embodiments of the present invention, the coil frame body is provided with a support wall, the support wall is disposed close to the mounting position, and the magnetic shielding part is directly connected to the support wall.

[0017] According to some embodiments of the present invention, a second recess is provided on the side wall of the iron core near the support wall, and a reinforcing part is provided in the second recess, the reinforcing part being integrally formed with the magnetic shielding part.

[0018] According to some embodiments of the present invention, a second protrusion is provided on the side wall of the iron core near the support wall, and the second protrusion is covered within the magnetic shielding portion.

[0019] According to some embodiments of the present invention, the iron core has a first attraction surface and a second attraction surface disposed opposite to each other, one end of the magnetic shielding part protrudes from the first attraction surface, and the other end of the magnetic shielding part protrudes from the second attraction surface.

[0020] According to some embodiments of the present invention, the armature includes a first armature and a second armature, and the core is located between the first armature and the second armature. The core includes a first core and a second core, the first core is located at a first end of the first armature and the second armature, and the second core is located at a second end of the first armature and the second armature.

[0021] According to some embodiments of the present invention, the coil frame and the iron core are integrally formed by injection molding.

[0022] The relay provided in this embodiment of the invention includes the aforementioned magnetic circuit portion.

[0023] One embodiment of the above invention has at least the following advantages or beneficial effects: The coil frame provided in this invention eliminates the need for welding the magnetic shielding sheet onto the iron core by directly connecting the magnetic shielding part to the coil frame. This avoids issues such as incomplete soldering, burn-through, and the generation of solder slag, ensuring the reliability of the relay. When the armature rotates to a stable state, the presence of the magnetic shielding part causes it to contact the armature, thus separating the surfaces of the iron core and armature that were close to each other. This reduces the electromagnetic force and ensures that the relay can release normally. Attached Figure Description

[0024] Figure 1 The diagram shown is a schematic diagram of the coil frame provided in Embodiment 1 of the present invention; Figure 2 The diagram shown is a schematic diagram of the structure of the coil frame and the iron core provided in Embodiment 1 of the present invention; Figure 3 The diagram shown is a top view of the coil frame and the iron core in cooperation according to Embodiment 1 of the present invention; Figure 4 The diagram shown is a structural schematic of the iron core in Embodiment 1 of the present invention; Figure 5The diagram shown is a partial cross-sectional view of the coil frame and the iron core in embodiment one of the present invention; Figure 6 The diagram shown is a schematic diagram of another structure of the iron core in Embodiment 1 of the present invention; Figure 7 The diagram shown is a third structural diagram of the iron core in Embodiment 1 of the present invention; Figure 8 The diagram shown is a structural schematic of the magnetic circuit portion provided in Embodiment 1 of the present invention; Figure 9 What is shown is Figure 8 A magnified view of a section at point A in the middle; Figure 10 The diagram shown is a structural schematic of the relay provided in Embodiment 1 of the present invention; Figure 11 The diagram shown is a top view of the relay provided in Embodiment 1 of the present invention; Figure 12 The diagram shown is a schematic diagram of the coil frame provided in Embodiment 2 of the present invention; Figure 13 The diagram shown is a schematic diagram of the structure of the coil frame and the iron core provided in Embodiment 2 of the present invention; Figure 14 The diagram shown is a structural schematic of the iron core in Embodiment 2 of the present invention; Figure 15 The diagram shown is a schematic diagram of the magnetic circuit portion provided in Embodiment 2 of the present invention; Figure 16 What is shown is Figure 15 A magnified view of a section at point B in the middle; Figure 17 The diagram shown is a structural schematic of the relay provided in Embodiment 2 of the present invention.

[0025] The reference numerals in the attached figures are explained as follows: 1-Coil frame body; 11-Magnetic shielding part; 111-First sub-magnetic shielding part; 112-Second sub-magnetic shielding part; 12-Reinforcing part; 121-First reinforcing part; 122-Second reinforcing part; 13-Supporting wall; 21-First iron core; 211-First contacting surface; 2110-Through hole; 2111-First sub-recessed part; 2112-Second sub-recessed part; 2113-First sub-protrusion; 2114-Second protrusion 212-Second suction surface; 22-Second iron core; 23-Connecting section; 31-First armature; 32-Second armature; 4-Injection molded part; 5-Base; 6-Rotating shaft; 71-First contact assembly; 711-First moving spring bracket; 712-First moving spring; 713-First stationary spring; 72-Second contact assembly; 721-Second moving spring bracket; 722-Second moving spring; 723-Second stationary spring. Detailed Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0027] Example 1

[0028] See Figures 1 to 11 As shown, this embodiment provides a coil frame, including a coil frame body 1 and a magnetic shielding part 11. The coil frame body 1 is provided with a mounting position for mounting an iron core. The magnetic shielding part 11 is connected to the coil frame body 1 and is used to contact the armature so as to separate the close surfaces of the armature and the iron core.

[0029] The coil frame provided in this embodiment eliminates the existing process of welding the magnetic shielding sheet onto the iron core by connecting the magnetic shielding part 11 to the coil frame. This avoids incomplete soldering, burn-through, and the generation of solder slag and foreign matter, ensuring the reliability of the relay. When the armature rotates to a stable state, the armature contacts the magnetic shielding part 11 due to its presence, thereby separating the surfaces of the iron core and the armature that are close to each other, reducing the electromagnetic force, and ensuring that the relay can release normally.

[0030] It should be understood that the surfaces of the iron core and the armature that are close to each other refer to the contact surface of the iron core and the pole surface of the armature facing the contact surface. The pole surface of the armature can contact the magnetic shielding part, which separates the pole surface of the armature from the contact surface of the iron core.

[0031] In one embodiment, the magnetic shielding part 11 is directly connected to the coil frame body 1. This reduces the number of parts and lowers costs.

[0032] In one embodiment, the magnetic shielding part 11 is integrally formed with the coil frame body 1. This reduces assembly steps and lowers costs.

[0033] In some embodiments, the magnetic shielding part 11 is made of plastic, and the material of the magnetic shielding part 11 is the same as that of the coil frame body 1. During production and processing, the magnetic shielding part 11 and the coil frame body 1 are integrally molded by injection molding, which can reduce assembly steps and reduce manufacturing costs.

[0034] Since the magnetic shielding part 11 is made of plastic, direct contact between the armature and the iron core can be avoided, reducing the metallic collision noise. In addition, compared with the metal magnetic shielding sheets in the prior art, the collision between the armature and the plastic magnetic shielding part 11 in this embodiment also reduces noise.

[0035] In one embodiment, the number of magnetic shielding parts 11 is equal to the number of iron cores.

[0036] In some embodiments, the number of magnetic shielding parts 11 is two, see [link to documentation]. Figures 1 to 3 As shown, each magnetic shielding part 11 includes a first sub-magnetic shielding part 111 and a second sub-magnetic shielding part 112. Both the first sub-magnetic shielding part 111 and the second sub-magnetic shielding part 112 are plate-shaped. The first sub-magnetic shielding part 111 and the second sub-magnetic shielding part 112 are disposed opposite to each other on both sides of the iron core. The iron core has a first attraction surface 211 and a second attraction surface 212 disposed opposite to each other. The first sub-magnetic shielding part 111 is located on the first attraction surface 211, and the second sub-magnetic shielding part 112 is located on the second attraction surface 212.

[0037] It should be noted that the iron core may also have only one contact surface.

[0038] This embodiment also provides a magnetic circuit part, including an iron core, an armature and a coil frame provided in this embodiment. The iron core is located at the mounting position of the coil frame body 1, and at least a portion of the magnetic shielding part 11 protrudes from the magnetic attraction surface of the iron core, so that the armature is separated from the magnetic attraction surface of the iron core by the magnetic shielding part 11.

[0039] The magnetic circuit provided in this embodiment eliminates the need for welding the existing magnetic shielding sheet onto the iron core by using the coil frame provided in this embodiment. This avoids issues such as incomplete soldering, burn-through, and the generation of solder slag or foreign matter, ensuring the reliability of the relay. When the armature rotates to a stable state, at least a portion of the magnetic shielding part 11 protrudes from the magnetic core's attraction surface, causing the armature to contact the magnetic shielding part 11. This separates the surfaces of the iron core and the armature that were close to each other, thereby reducing the electromagnetic force and ensuring that the relay can release normally.

[0040] In one embodiment, the coil frame and the iron core are integrally molded by injection molding. This ensures the accurate positioning of the magnetic shielding part 11 and avoids the misalignment that easily occurs when placing the magnetic shielding sheet on the magnetic core's attraction surface in the prior art.

[0041] In one embodiment, see Figure 8 and Figure 9 As shown, the armature includes a first armature 31 and a second armature 32. The core is located between the first armature 31 and the second armature 32. The core includes a first core 21 and a second core 22. The first core 21 is located at the first end of the first armature 31 and the second armature 32, and the second core 22 is located at the second end of the first armature 31 and the second armature 32.

[0042] For example, see Figure 8 As shown, the first armature 31 and the second armature 32 are arranged parallel to each other and spaced apart; see also Figure 4As shown, the first iron core 21 and the second iron core 22 are integrally formed. Of course, the first iron core 21 and the second iron core 22 can also be separately formed. The iron core also includes a connecting section 23, which is located between the first iron core 21 and the second iron core 22. The first iron core, the second iron core and the connecting section are integrally formed. The mounting positions include a first mounting position, a second mounting position and a third mounting position. The first mounting position and the second mounting position are located at both ends of the coil frame body, respectively. The third mounting position is a channel located inside the coil frame body. The first mounting position and the second mounting position are both connected to the channel so that the first iron core can pass through the first mounting position and the second iron core can pass through the second mounting position.

[0043] Specifically, the pole faces of the first armature 31 and the second armature 32 are opposite each other, both facing the iron core. See also Figure 3 and Figure 9 As shown, both the first core 21 and the second core 22 have a first attracting surface 211 and a second attracting surface 212 arranged opposite to each other. The first attracting surface 211 is close to the first armature 31, and the second attracting surface 212 is close to the second armature 32. That is, the pole surface of the first armature 31 is the surface of the first armature 31 facing the first attracting surface 211 of the first core 21 and the second core 22, and the pole surface of the second armature 32 is the surface of the second armature 32 facing the second attracting surface 212 of the first core 21 and the second core 22.

[0044] See Figure 8 As shown, the magnetic circuit section also includes a permanent magnet located between the first armature 31 and the second armature 32. The first armature 31, the second armature 32, and the permanent magnet are held together by the injection molding part 4 to form an armature assembly, wherein the first armature 31 and the second armature 32 are partially enclosed within the injection molding part 4. The magnetic circuit section also includes a coil disposed outside the coil frame body.

[0045] In this embodiment, see Figure 2 and Figure 3 As shown, the magnetic shielding part 11 is located on the side of the iron core's attraction surface facing the armature.

[0046] There are two magnetic shielding parts 11. One magnetic shielding part 11 is located on the side of the first iron core 21 facing the armature on the attraction surface, and the other magnetic shielding part 11 is located on the side of the second iron core 22 facing the armature on the attraction surface. See also Figure 2 and Figure 3As shown, each magnetic shielding part 11 includes a first sub-magnetic shielding part 111 and a second sub-magnetic shielding part 112. Both the first sub-magnetic shielding part 111 and the second sub-magnetic shielding part 112 are plate-shaped. The first sub-magnetic shielding part 111 is located on the side of the first attraction surface 211 facing the first armature 31, and the second sub-magnetic shielding part 112 is located on the side of the second attraction surface 212 facing the second armature 32. Specifically, taking the magnetic shielding part 11 on the first iron core 21 as an example, the first sub-magnetic shielding part 111 is located on the side of the first attraction surface 211 of the first iron core 21 facing the first armature 31, and the second sub-magnetic shielding part 112 is located on the side of the second attraction surface 212 of the first iron core 21 facing the second armature 32.

[0047] In this embodiment, at least a portion of the surface of the armature near the iron core is in indirect contact with the magnetic shielding part 11 and the attraction surface of the iron core facing the armature.

[0048] In this embodiment, see Figure 1 , Figure 4 and Figure 5 As shown, the magnetic attraction surface of the iron core is provided with a first recess, and a reinforcing part 12 is provided in the first recess. The reinforcing part 12 and the magnetic shielding part 11 are integrally formed.

[0049] For example, taking the first iron core 21 as an example, the first recess includes a first sub-recess 2111 disposed on the first attraction surface 211 and a second sub-recess disposed on the second attraction surface 212, wherein the second sub-recess corresponds to the position of the first sub-recess 2111; the reinforcing part 12 includes a first reinforcing part 121 disposed in the first sub-recess 2111 and a second reinforcing part 122 disposed in the second sub-recess; the magnetic shielding part 11 includes a first sub-magnetic shielding part 111 and a second sub-magnetic shielding part 112, the first sub-magnetic shielding part 111 is located on the side of the first attraction surface 211 facing the first armature, the first sub-magnetic shielding part 111 and the first reinforcing part 121 are integrally formed, the second sub-magnetic shielding part 112 is located on the side of the second attraction surface 212 facing the second armature, the second sub-magnetic shielding part 112 and the second reinforcing part 122 are integrally formed, and the iron core and the reinforcing part 12 are integrally formed. This method can improve the strength of the first sub-magnetic shielding part 111 and the second sub-magnetic shielding part 112, ensure the positioning accuracy of the first sub-magnetic shielding part 111 and the second sub-magnetic shielding part 112, and prevent the coil frame from shifting during the process of the armature striking the iron core, thereby preventing the magnetic shielding part 11 from shifting, so as to ensure the magnetic shielding effect.

[0050] It should be noted that the structure of the second iron core 22 is basically the same as that of the first iron core 21, and the structure of the second iron core 22 and the magnetic shielding part 11 is basically the same as that of the first iron core 21 and the magnetic shielding part 11, which will not be described in detail here.

[0051] In some embodiments, see Figure 4As shown, the first sub-recess 2111 communicates with the second sub-recess to form a through hole 2110 penetrating the first attraction surface 211 and the second attraction surface 212. The second sub-recess is located on the second attraction surface and its position corresponds to that of the first sub-recess 2111. The reinforcing part 12 fills the through hole. The first sub-magnetic shielding part 111, the second sub-magnetic shielding part 112 and the reinforcing part 12 are integrally formed.

[0052] In this embodiment, the first sub-recessed portion 2111 is partially connected to the second sub-recessed portion. Of course, the first sub-recessed portion 2111 and the second sub-recessed portion can also be fully connected.

[0053] For example, the cross-sectional shape of the through hole 2110 is circular. The material of the reinforcing part 12 is the same as that of the magnetic shielding part 11.

[0054] It should be noted that the cross-sectional shape of the through hole 2110 is not limited to a circle, but can also be other shapes, such as ellipse or rectangle.

[0055] In other embodiments, see Figure 6 As shown, the first sub-recess 2111 and the second sub-recess 2112 may not be connected. That is, the first sub-recess 2111 is a groove provided on the first abutment surface 211, and the second sub-recess 2112 is a groove provided in the second abutment surface 212.

[0056] In other embodiments, the contact surface of the iron core is provided with a first protrusion, which covers the magnetic shielding part 11. This increases the contact area between the magnetic shielding part 11 and the iron core, thereby enhancing the structural strength of the magnetic shielding part 11.

[0057] For example, taking the first iron core 21 as an example, see... Figure 7 As shown, the first protrusion includes a first sub-protrusion 2113 located on the first attraction surface 211 and a second sub-protrusion (not shown in the figure) located on the second attraction surface 212; the first sub-protrusion 2113 covers the first sub-magnetic shielding part, and the second sub-protrusion covers the second sub-magnetic shielding part.

[0058] It should be noted that the structure of the second iron core 22 is basically the same as that of the first iron core 21, and the structure of the second iron core 22 and the magnetic shielding part 11 is basically the same as that of the first iron core 21 and the magnetic shielding part 11, which will not be described in detail here.

[0059] This embodiment also provides a relay, including the magnetic circuit portion provided in Embodiment 1.

[0060] The relay provided in this embodiment, by using the magnetic circuit portion provided in Embodiment 1, eliminates the existing process of welding the magnetic shielding sheet onto the iron core, avoiding incomplete soldering, burn-through, and the generation of welding slag and foreign matter, thus ensuring the reliability of the relay quality. Simultaneously, it does not alter the relay's travel distance. When the armature rotates to a stable state, since at least a portion of the magnetic shielding part 11 protrudes from the iron core's attraction surface, the armature contacts the magnetic shielding part 11, thereby separating the surfaces of the iron core and armature that were close to each other, reducing the electromagnetic force, and ensuring the relay can release normally.

[0061] See Figure 10 As shown, the relay in this embodiment also includes a base 5, and the iron core and coil frame are injection molded together and then inserted into the base 5. The base 5 is provided with a rotating shaft 6, and the injection molded part 4 of the armature assembly is provided with a shaft hole. The rotating shaft 6 passes through the shaft hole, and the armature assembly can rotate relative to the rotating shaft 6.

[0062] In one embodiment, see Figure 11 As shown, the pivot 6 is located on one side of the thickness direction of the armature, that is, the pivot 6 is located on the side of the second armature 32 away from the first armature 31, and the pivot 6 is located between the two ends of the armature in the length direction.

[0063] In this embodiment, see Figure 10 and Figure 11 As shown, the relay also includes a contact portion, which includes a first contact assembly 71 and a second contact assembly 72. The first contact assembly 71 and the second contact assembly 72 are located on both sides of the rotating shaft 6, and the first contact assembly 71, the second contact assembly 72 and the rotating shaft 6 are all located on the same side of the armature assembly.

[0064] The first contact assembly 71 includes a first moving spring bracket 711, a first moving spring 712, and a first stationary spring 713. The first stationary spring 713 is fixedly mounted on the base 5, the first moving spring bracket 711 is inserted into the base 5, and the first moving spring 712 is mounted on the first moving spring bracket 711 and moves with the armature assembly. The second contact assembly 72 includes a second moving spring bracket 721, a second moving spring 722, and a second stationary spring 723. The second stationary spring 723 is fixedly mounted on the base 5, the second moving spring bracket 721 is inserted into the base 5, and the second moving spring 722 is mounted on the second moving spring bracket 721 and moves with the armature assembly.

[0065] It should be noted that the structures of the first contact assembly 71 and the second contact assembly 72 are existing technologies and will not be described in detail here.

[0066] Specifically, by applying forward and reverse currents to the coil, the armature assembly can rotate around the shaft 6, allowing it to rotate in a first position and a second position. That is, when the armature assembly rotates to its designated position around the shaft 6, it is in either the first or second position. (See also...) Figure 9 and Figure 11 As shown, when the armature assembly is in the first position, the first end of the first armature 31 ( Figure 11 The surface of the first magnetic contact surface 211 (shown at the left end) facing the first iron core 21 contacts the first magnetic shielding part 111, thereby separating it from the first magnetic contact surface 211 of the first iron core 21. The second end of the second armature 32 (shown at the left end) Figure 11 The surface of the second magnetic contact surface 212 (shown at the right end) facing the second iron core 22 contacts the second magnetic shielding part 112, thereby separating it from the second magnetic contact surface 212 of the second iron core 22. At this time, the moving contact of the first moving spring 712 contacts the stationary contact of the first stationary spring 713, and the moving contact of the second moving spring 722 separates from the stationary contact of the second stationary spring 723.

[0067] When the armature assembly is in the second position, the surface of the second end of the first armature 31 facing the first magnetic contact surface of the second core 22 contacts the first sub-magnetic shield 111, thereby separating it from the first magnetic contact surface of the second core 22. The surface of the first end of the second armature 32 facing the second magnetic contact surface of the first core contacts the second sub-magnetic shield 112, thereby separating it from the second magnetic contact surface of the first core. At this time, the moving contact of the first moving spring 712 separates from the stationary contact of the first stationary spring 713, and the moving contact of the second moving spring 722 contacts the stationary contact of the second stationary spring 723.

[0068] Example 2

[0069] See Figures 12 to 17 As shown, this embodiment also provides a coil frame, including a coil frame body 1 and a magnetic shielding part 11. The coil frame body 1 is provided with a mounting position for mounting an iron core. The magnetic shielding part 11 is directly connected to the coil frame body 1 and is used to contact the armature so as to separate the surfaces of the armature and the iron core that are close to each other.

[0070] The coil frame provided in this embodiment eliminates the existing process of welding the magnetic shielding sheet onto the iron core by directly connecting the magnetic shielding part 11 to the coil frame. This avoids incomplete soldering, burn-through, and the generation of solder slag and foreign matter, ensuring the reliability of the relay. When the armature rotates to a stable state, the armature contacts the magnetic shielding part 11 due to its presence, thereby separating the surfaces of the iron core and the armature that are close to each other, reducing the electromagnetic force, and ensuring that the relay can release normally.

[0071] The difference from Example 1 is that, see [link to example]. Figure 12 As shown, the coil frame body is provided with a support wall 13, which is located near the mounting position, and the magnetic shielding part is directly connected to the support wall. Specifically, a support wall is provided near both the first and second mounting positions, and the support wall is located between the first and second mounting positions. For example, see [link to example]. Figure 13As shown, the magnetic shielding part 11 is plate-shaped, and the plate surface of the magnetic shielding part 11 is generally perpendicular to the contact surface of the iron core. The end of the magnetic shielding part 11 protrudes from the contact surface of the iron core. When the armature rotates to a stable state, the armature contacts the magnetic shielding part 11, thereby separating the close-to-each surfaces of the armature and the iron core, thereby reducing the electromagnetic force and ensuring that the relay can release normally.

[0072] This embodiment also provides a magnetic circuit part, including an iron core, an armature and a coil frame provided in this embodiment. The iron core is located at the mounting position of the coil frame body 1, and at least a portion of the magnetic shielding part 11 protrudes from the magnetic attraction surface of the iron core, so that the armature is separated from the magnetic attraction surface of the iron core by the magnetic shielding part 11.

[0073] The difference from Example 1 is that, see [link to example]. Figure 16 As shown, the contact surfaces of the armature and the iron core do not contact each other.

[0074] The iron core has a first attraction surface 211 and a second attraction surface 212 that are arranged opposite to each other. One end of the magnetic shielding part 11 protrudes from the first attraction surface 211, and the other end of the magnetic shielding part 11 protrudes from the second attraction surface 212.

[0075] Specifically, the magnetic shielding part 11 has a first end and a second end that are disposed opposite to each other in a direction perpendicular to the first attraction surface 211. The first end protrudes from the first attraction surface 211 and the second end protrudes from the second attraction surface 212.

[0076] In this embodiment, a second protrusion 2114 is provided on the side wall of the iron core near the support wall, and the second protrusion 2114 covers the magnetic shielding part 11. During the process of the armature striking the iron core, displacement of the coil frame can be avoided, thereby preventing displacement of the magnetic shielding part 11, so as to ensure the magnetic shielding effect. At the same time, it can also increase the contact area between the magnetic shielding part 11 and the iron core, and enhance the structural strength of the magnetic shielding part 11.

[0077] For example, taking the first iron core 21 as an example, see... Figure 14 As shown, the first iron core 21 has a second protrusion 2114 on the side wall near the support wall. The shape of the second protrusion 2114 can be a rectangular plate. Of course, the shape of the second protrusion 2114 can also be a circular plate or other shapes. After injection molding, the second protrusion 2114 covers the magnetic shielding part 11.

[0078] In other embodiments, a second recess is provided on the side wall of the iron core near the support wall, and a reinforcing part is provided in the second recess. The reinforcing part and the magnetic shielding part are integrally formed.

[0079] For example, taking the first iron core 21 as an example, a second recess is provided on the side wall of the first iron core 21 near the support wall. The second recess can be a shallow groove. After injection molding, the reinforcing part 12 fills the second recess. By integrally molding the reinforcing part 12 with the magnetic shielding part 11, the contact area between the magnetic shielding part 11 and the iron core can be increased, thereby enhancing the structural strength of the magnetic shielding part 11.

[0080] See Figure 17 As shown, this embodiment also provides a relay, including the magnetic circuit part provided in embodiment two.

[0081] The relay provided in this embodiment has the same structure as that in Embodiment 1 except for the magnetic circuit part, and will not be described again here.

[0082] Finally, it should be noted that the various embodiments / implementations provided by this invention can be combined with each other without creating contradictions, and will not be described in detail here.

[0083] In the embodiments of the invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the invention according to the specific circumstances.

[0084] In the description of the embodiments of the invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the invention.

[0085] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0086] The above are merely preferred embodiments of the invention and are not intended to limit the scope of the invention. Those skilled in the art will recognize that various modifications and variations can be made to the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A magnetic circuit component, characterized in that, The device includes an iron core, an armature, and a coil frame. The coil frame includes a coil frame body and a magnetic shielding part. The coil frame body is provided with a mounting position for mounting the iron core. The magnetic shielding part is integrally formed with the coil frame body. The iron core is located at the mounting position of the coil frame body. The magnetic shielding part is located on the contact surface of the iron core. At least a portion of the magnetic shielding part protrudes from the contact surface of the iron core, so that the armature is separated from the contact surface of the iron core by the magnetic shielding part. The armature includes a first armature and a second armature, and the iron core is located between the first armature and the second armature. The iron core includes a first iron core and a second iron core, with the first iron core located at the first end of the first armature and the second armature, and the second iron core located at the second end of the first armature and the second armature. The magnetic circuit section also includes a permanent magnet located between the first armature and the second armature.

2. The magnetic circuit portion according to claim 1, characterized in that, The magnetic shielding part is directly connected to the coil frame body, and / or the magnetic shielding part is made of plastic.

3. The magnetic circuit portion according to claim 1, characterized in that, The magnetic shielding part is located on the side of the iron core's attraction surface facing the armature.

4. The magnetic circuit portion according to claim 3, characterized in that, The iron core has a first recessed portion on its attraction surface, and a reinforcing portion is provided in the first recessed portion. The reinforcing portion and the magnetic shielding portion are integrally formed.

5. The magnetic circuit portion according to claim 3, characterized in that, The magnetic core has a first protrusion on its attraction surface, which covers the magnetic shielding part.

6. The magnetic circuit portion according to claim 4, characterized in that, The iron core has a first suction surface and a second suction surface disposed opposite to each other. The first recess includes a first sub-recess disposed on the first suction surface and a second sub-recess disposed on the second suction surface. The reinforcing part includes a first reinforcing part disposed in the first sub-recess and a second reinforcing part disposed in the second sub-recess. The magnetic shielding part includes a first sub-magnetic shielding part and a second sub-magnetic shielding part. The first sub-magnetic shielding part is located on the first attraction surface and is integrally formed with the first reinforcing part. The second sub-magnetic shielding part is located on the second attraction surface and is integrally formed with the second reinforcing part.

7. The magnetic circuit portion according to claim 6, characterized in that, The first sub-recessed portion is connected to the second sub-recessed portion to form a through hole penetrating the first and second attraction surfaces; the first sub-magnetic shielding portion, the second sub-magnetic shielding portion and the reinforcing portion are integrally formed.

8. The magnetic circuit portion according to claim 5, characterized in that, The iron core has a first suction surface and a second suction surface that are disposed opposite to each other, and the first protrusion includes a first sub-protrusion located on the first suction surface and a second sub-protrusion located on the second suction surface; The magnetic shielding part includes a first sub-magnetic shielding part and a second sub-magnetic shielding part, wherein the first sub-protrusion covers the first sub-magnetic shielding part and the second sub-protrusion covers the second sub-magnetic shielding part.

9. The magnetic circuit portion according to claim 1, characterized in that, The coil frame body is provided with a support wall, which is located close to the mounting position, and the magnetic shielding part is directly connected to the support wall.

10. The magnetic circuit portion according to claim 9, characterized in that, The iron core has a second recessed portion on its side wall near the support wall, and a reinforcing portion is provided in the second recessed portion. The reinforcing portion and the magnetic shielding portion are integrally formed.

11. The magnetic circuit portion according to claim 9, characterized in that, The iron core has a second protrusion on its side wall near the support wall, and the second protrusion is enclosed within the magnetic shielding part.

12. The magnetic circuit portion according to claim 9, characterized in that, The iron core has a first attraction surface and a second attraction surface arranged opposite to each other. One end of the magnetic shielding part protrudes from the first attraction surface, and the other end of the magnetic shielding part protrudes from the second attraction surface.

13. The magnetic circuit portion according to any one of claims 1 to 12, characterized in that, The coil frame and the iron core are integrally formed by injection molding.

14. A relay, characterized in that, Includes the magnetic circuit portion as described in any one of claims 1 to 13.

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