Relay base and magnetic latching relay

Abstract

The utility model provides a relay base and a magnetic latching relay, the relay base is provided with a first mounting groove and a second mounting groove which are adjacently arranged, the second mounting groove is provided with a first space, a second space and a third space, the second space is suitable for placing an external insulating member, and the second space comprises a horizontal part and a vertical part which are communicated with each other; the first space is located above the horizontal part and is suitable for a leading-out pin of the coil to extend into; the vertical part is positioned below the horizontal part; the third space is located on the side, away from the first installation groove, of the vertical part and used for installing the contact part. The relay base in the technical scheme not only meets the installation of a contact part, but also leaves a space for isolation. The structure that the lead-out pins of the coil are led out from the side and the upper portion can be adapted at the same time, and the adaptability is good.

Description

Technical Field

[0001] The utility model relates to the field of relays, in particular to a relay base and a magnetic latching relay. Background Art

[0002] In the prior art, the coil lead-out structure is shared by the coil lead-out end and the winding connection end, which is fixed to the coil frame and extends axially along the coil to the side where the winding is located. The shared coil lead-out structure needs to be welded to the enameled wire and the external signal line at the same time. The two weldings can easily cause the enameled wire to loosen, poor contact, and easily contaminate the contacts.

[0003] In response to the above problems, the coil lead-out structure is often designed to have two parts, including a winding connection end and a lead pin, wherein the winding connection end is used to connect the winding (i.e., enameled wire), and extends along the coil axis to the side where the winding is located. The lead pin is used to establish a connection with the outside, and its extension method is often designed into two types according to different needs. One is to extend from the outer end face of the coil frame in a direction perpendicular to the coil axis, and each lead pin is distributed in the same plane perpendicular to the coil axis; the other is to extend from the outer end face of the coil frame along the coil axis to the side away from the winding, and then bend and extend, and each lead pin is distributed in a plane parallel to the coil axis.

[0004] In existing magnetic holding relays, the base is generally equipped with contact parts (i.e., static contacts and moving contacts) at one or both ends of the coil along its axial direction. Therefore, if the lead-out end of the lead-out pin of the coil is led out from one side of the outer end surface of the coil frame, it is necessary to consider the electrical isolation between the lead-out end and the contact part. In other words, it is necessary to ensure that there is sufficient creepage distance between the lead-out end and the contact part. This can be achieved by increasing the distance between the lead-out end and the contact part. However, this method of increasing the distance will inevitably increase the appearance size of the base and the entire relay, thereby increasing the cost of the relay and possibly limiting its application. Utility Model Content

[0005] To this end, in order to solve the above-mentioned problems, the utility model provides a relay base and a magnetic latching relay, which can ensure good voltage resistance between the lead pins and the contact part of the coil, while ensuring that the internal components of the relay can be arranged compactly, and further, the base has good versatility and can be adapted to the lead pins and insulation structures of different forms of coils.

[0006] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0007] A relay base comprises a first mounting groove and a second mounting groove which are arranged adjacent to each other, wherein the first mounting groove is used to mount a coil, and an isolating groove wall is provided between the first mounting groove and the second mounting groove; the second mounting groove is provided with a first space, a second space and a third space, wherein the second space is suitable for inserting an external insulating component, and comprises a connected horizontal part and a vertical part; the first space is located above the horizontal part, and is suitable for inserting a lead-out pin of the coil; the vertical part is located below the horizontal part; the third space is located on a side of the vertical part which is away from the first mounting groove, and is used for installing a contact part.

[0008] The relay base is arranged with the first space, the second space and the third space in the second installation groove, which not only meets the installation requirements of the contact part but also leaves space for isolation, thus facilitating subsequent compact installation.

[0009] Furthermore, the vertical portion is close to one side of the first mounting groove; and the third space also at least partially extends to below the horizontal portion.

[0010] Furthermore, the height of the isolation groove wall is lower than the height of the outer wall of the relay base, thereby forming a gap that is laterally connected to the first space, so that the first space is laterally connected to the first installation groove.

[0011] Furthermore, a rear groove wall of the second installation groove is provided with an installation opening corresponding to the first space.

[0012] A magnetic latching relay comprises a shell and a magnetic circuit portion and a contact portion arranged in the shell, the shell comprising a base, an insulating block and a first shell, the base is the relay base described above, the coil of the magnetic circuit portion is assembled in a first mounting groove, the insulating block constitutes an insulating member, which comprises a horizontal insulating portion and a vertical insulating portion connected to each other, the vertical insulating portion is inserted in the vertical portion of a second space, and the horizontal insulating portion is placed in the horizontal portion of the second space; the lead pins of the coil extend into the first space above the horizontal insulating portion and extend horizontally out of the base; the contact portion is assembled in a third space, and the first shell covers the base.

[0013] The magnetic latching relay is arranged by arranging an insulating block on a base, wherein a vertical insulating portion of the insulating block separates the coil enameled wire and the contact portion and provides a creepage distance; a horizontal insulating portion separates the lead pins and the contact portion of the coil and provides a creepage distance, thereby allowing the magnetic circuit portion and the contact portion to be arranged in close proximity, thereby reducing the length of the relay and having a high withstand voltage characteristic at the same time.

[0014] Furthermore, at least one isolation rib is protruded from the upper surface of the horizontal isolation portion of the insulating block, and the isolation rib is located on the side of the lead-out pin of the coil away from the first mounting groove and / or on the side of the lead-out pin of the coil away from its lead-out direction.

[0015] Furthermore, the isolation rib includes a first isolation portion located on a side of the lead-out pin of the coil away from the first installation slot and a second isolation portion located on a side of the lead-out pin of the coil away from its lead-out direction.

[0016] Furthermore, the isolation rib is higher than the highest position of the lead-out pins of the coil located in the first space.

[0017] Furthermore, the number of the isolation ribs is at least two, and the first shell further extends between two adjacent isolation ribs to form a convex rib.

[0018] Furthermore, the rear side wall of the base has at least two step surfaces arranged along the lead-out direction of the lead-out pins, and the isolation ribs are respectively in contact with the at least two step surfaces.

[0019] Furthermore, a mounting portion is protruded in the second mounting groove of the base, and the insulating block is supported on the mounting portion.

[0020] Furthermore, the mounting portion is provided with a socket, and the insulating block has an insertion column, and the insertion column is fixedly inserted in the socket.

[0021] Furthermore, the plug is formed at the bottom of the horizontal insulating portion of the insulating block and extends downward.

[0022] Furthermore, the mounting portion and the isolation slot wall are spaced apart and the space formed by the space constitutes a part of the vertical portion of the second space.

[0023] Furthermore, the fixed ends of the movable spring piece and the movable spring lead-out piece in the contact portion are clamped between the mounting portion and the groove wall of the second mounting groove.

[0024] A magnetic latching relay comprises a shell and a magnetic circuit portion and a contact portion arranged in the shell, the shell comprising a base and a second shell, the base being the relay base described above, the coil of the magnetic circuit portion being mounted in a first mounting groove, the contact portion being mounted in a third space, the second shell covering the base, the second shell being provided with a retaining wall extending downward, the retaining wall constituting the insulating member, which is suitable for passing through the horizontal portions of the first space and the second space and being inserted in the vertical portion of the second space; the lead pins of the coil extend upward and pass through the second shell.

[0025] The magnetic latching relay is arranged such that a retaining wall extending downward from the second housing is inserted into the vertical portion of the second space, thereby separating the coil enameled wire and the contact portion and providing a creepage distance; the lead pins of the coil extend upward and pass through the second housing, thereby being led out from above, thereby achieving effective isolation of the coil enameled wire and the contact portion, and effective isolation of the lead pins of the coil and the contact portion, thereby reducing the length of the relay.

[0026] Furthermore, a fixing boss is raised on the upper surface of the second shell, a through hole is formed on the fixing boss and passes through to the lower surface of the second shell, and the lead pin of the coil is inserted into the through hole of the fixing boss.

[0027] The technical solution provided by the utility model has the following beneficial effects:

[0028] 1. In the relay base, the second installation groove is adjacently arranged on one side of the first installation groove, and the lead pin of the coil installed in the first installation groove can extend into the second installation groove. The second installation groove is provided with a first space, a second space and a third space, wherein the first space is located above the second space and is suitable for placing the lead pin of the coil; the second space is suitable for placing an external insulating member, and includes a horizontal part and a vertical part that are connected, the horizontal part is located below the first space, and the vertical part is located below the horizontal part, so that the first space, the horizontal part of the second space and the vertical part of the second space are correspondingly connected in the vertical direction; the third space is located on the side of the vertical part away from the first installation groove, and is used to install the contact part. Based on the above structure, when the relay base is actually used, the lead pin of the coil located in the first space and the contact part located in the third space can be isolated by arranging an insulating member in the second space, so as to increase the creepage distance between the lead pin of the coil and the contact part, so as to prevent the electrical breakdown between the lead pin of the coil and the contact part without increasing the size of the base, thereby improving the voltage resistance of the relay and ensuring the electrical safety of the relay.

[0029] In addition, the above relay base has good versatility and can be used to install coils of different forms. The different forms of coils specifically refer to the different lead-out directions of the lead-out pins of the coils. At the same time, electrical isolation between the magnetic circuit part (especially the lead-out pins of the coil) and the contact part can be achieved for the different forms of coils. Specifically, when the lead-out pins of the coil used in conjunction with the relay base are in the form of extending from the outer end surface of the coil frame in a direction perpendicular to the axial direction of the coil, the base can allow an external insulating component to be installed and used to increase the creepage distance. The external insulating component only needs to meet the requirement of at least vertically interspersed in the first space, the horizontal part of the second space and the vertical part of the second space to separate the lead-out pins and the contact part of the coil on both sides, so that a creepage path is formed between the lead-out pins and the contact part of the coil that needs to bypass the external insulating component, thereby lengthening the creepage distance between the lead-out pins and the contact part of the coil and achieving electrical isolation. When the lead pins of the coil used in conjunction with the relay base are in the form of extending and bending from the outer section of the coil frame along the axial direction of the coil toward the side away from the winding, the base can still increase the creepage distance by allowing the installation of an external insulating component. The external insulating component only needs to be placed in the second space from the first space and is constructed so that the horizontal part and the vertical part of the second space both have corresponding insulating parts to separate the lead pins and the contact part of the coil, wherein the insulating part located in the horizontal part of the second space can isolate the lead pins and the contact part of the coil in the vertical direction, so even if the contact part is arranged below the horizontal part of the second space, the electrical isolation of the lead pins and the contact part of the coil can be achieved, that is, the relay base allows the contact part to be arranged as close to one side of the first installation groove as possible, thereby achieving a compact layout and providing conditions for realizing a small size of the relay; the external insulating component is located in the vertical part of the second space, which can isolate the coil and the contact part in the horizontal direction, further increasing the creepage distance.

[0030] Therefore, the relay base provided by the present technical solution can not only ensure that the lead pins and the contact part of the coil have good pressure resistance, but also ensure that the coil and the contact part of the relay can be compactly arranged; in addition, the relay base also has good versatility and can be adapted to coils of different forms, and no matter which form of coil is adapted, it can allow the coil and the contact part to form a good pressure resistance effect without increasing the volume.

[0031] 2. The vertical part is close to one side of the first mounting groove. When the external insulating component located in the second space can increase the creepage distance between the lead pin of the coil and the contact part in the vertical direction, the third space is extended to the bottom of the horizontal part. This can make the contact part as close as possible to the side where the first mounting groove is located, that is, close to the side where the coil is located, so that the structure is more compact, which is more conducive to ensuring that the relay achieves a smaller volume.

[0032] 3. The height of the isolation slot wall is lower than the height of the outer wall of the relay base, thereby forming a clearance gap that is laterally connected to the first space, so that the first space is laterally connected to the first installation slot. The setting of the clearance gap makes it easier for the lead-out pin of the coil to extend to the first space, thereby facilitating its lead-out.

[0033] 4. The rear groove wall of the second installation groove is provided with an installation opening corresponding to the first space, and the lead pin extending to the first space can be led out from the installation opening of the rear groove wall of the second installation groove to achieve connection with the outside.

[0034] 5. In the first type of magnetic latching relay in which the lead pins of the coil are led out laterally, in conjunction with the setting of the insulating block, the vertical insulating portion of the insulating block separates the coil enameled wire, the lead pins of the coil and the contact part in the horizontal direction and provides a creepage distance; the horizontal insulating portion separates the lead pins of the coil and the contact part in the vertical direction and provides a creepage distance, thereby allowing the magnetic circuit part and the contact part to be arranged in close proximity, thereby reducing the length of the relay and having a high voltage resistance characteristic at the same time.

[0035] 6. The upper surface of the horizontal insulating portion of the insulating block is protruded with at least one isolation rib, and the isolation rib is located on the side of the lead-out pin away from the first mounting groove and / or on the side of the lead-out pin away from its lead-out direction. The provision of the isolation rib can effectively increase the creepage distance between the lead-out pin portion and the contact portion located in the first space in the above two directions. More specifically, the number of the isolation ribs is at least two, and the first shell also extends between two adjacent isolation ribs to form a convex rib. The two isolation ribs and one convex rib form a creepage path similar to a "W" shape; the isolation effect is better.

[0036] 7. The rear side wall of the base has at least two step surfaces arranged along the lead-out direction of the lead-out pins, and each isolation rib is respectively in contact with at least two step surfaces, thereby further increasing the creepage distance between the portion of the lead-out pin of the coil extending toward the rear side of the base and the contact portion in the third space.

[0037] 8. In the second type of magnetic latching relay in which the lead pin of the coil is led upward, a retaining wall extending downward through the second housing is inserted into the vertical part of the second space, thereby separating the coil enameled wire and the contact part and providing a creepage distance; the lead pin of the coil extends upward and passes through the second housing, thereby being led out from above. The setting of the retaining wall realizes effective isolation of the coil enameled wire and the contact part, as well as effective isolation of the lead pin of the coil from the contact part; thereby, the contact part can be set as close as possible to the coil and its lead pin, realizing a small size; thereby reducing the length of the relay.

[0038] 9. A fixing boss is raised on the upper surface of the second housing, and a through hole is formed on the fixing boss that penetrates to the lower surface of the second housing, and the lead pins of the coil are inserted into the through hole of the fixing boss, so as to achieve stable installation of the lead pins of the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The figure shows a three-dimensional structural schematic diagram of a relay base in the embodiment;

[0040] Figure 2 Shown is a top view of the relay base in the embodiment;

[0041] Figure 3 Shown Figure 2 Partial structural cross-sectional view along line BB;

[0042] Figure 4 Shown Figure 2 Structural cross-section view of the CC line;

[0043] Figure 5 The figure shows the appearance of the magnetic latching relay in the first embodiment;

[0044] Figure 6 The figure is a partial structural cross-sectional view of the magnetic latching relay in the first embodiment;

[0045] Figure 7 The figure is a schematic diagram of the structure decomposition of the magnetic latching relay in the first embodiment;

[0046] Figure 8 The figure is a schematic diagram of the structure of the magnetic latching relay in the first embodiment after being hidden in the first housing;

[0047] Fig. 9 Shown Figure 8 A magnified schematic diagram of the middle A area;

[0048] Fig.10 The structure of the insulating block in the first embodiment is shown as follows Figure 1 ;

[0049] Fig.11 The structure of the insulating block in the first embodiment is shown as follows Figure 2 ;

[0050] Fig.12 The figure shows the appearance of the magnetic latching relay in the second embodiment;

[0051] Fig.13 The figure shows a schematic diagram of the structure of the magnetic latching relay in the second embodiment after the second housing is hidden;

[0052] Fig.14 The figure shows a partial structural cross-sectional view of the magnetic latching relay in the second embodiment;

[0053] Fig.15 The structure of the first housing in the second embodiment is shown as follows Figure 1 ;

[0054] Fig.16 The structure of the first housing in the second embodiment is shown as follows Figure 2 . DETAILED DESCRIPTION

[0055] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0056] In the description of the present invention, terms such as "upper", "lower", "left", "right", "front", "backward", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0058] Embodiment 1

[0059] Reference Figures 1 to 4 As shown, a relay base provided in this embodiment has a first mounting groove 11 and a second mounting groove 12 arranged adjacent to each other, and the first mounting groove 11 is used to mount the coil 211 (refer to Figure 6 ), an isolation groove wall 14 is provided between the first installation groove 11 and the second installation groove 12. Figure 2 As shown, the X-axis direction is the length direction, and the Y-axis direction is the width direction; in this specific embodiment, the relay base also has a third mounting groove 13, and the notches of the third mounting groove 13, the first mounting groove 11, and the second mounting groove 12 are all facing upward, and the three are arranged in sequence along the length direction of the relay base, that is, the first mounting groove 11 is located between the second mounting groove 12 and the third mounting groove 13. In the subsequent assembly, as Figure 6 and Figure 7 As shown, the second mounting groove 12 and the third mounting groove 13 are both used to assemble the contact part 22 of the relay. In this embodiment, the structure of the third mounting groove 13 is not improved and designed, so the structure of the third mounting groove 13 is not described. Of course, it does not matter whether there is the third mounting groove 13 or not.

[0060] The second installation groove 12 is provided with a first space 1, a second space 2 and a third space 3. The second space 2 is suitable for placing an external insulating member, and includes a horizontal portion 4 and a vertical portion 5 connected to each other. Specifically, the first space 1, the second space 2 and the third space 3 are all space ranges, not physical structures, such as Figure 3 and Figure 4 The figure shows the range of the first space 1, the second space 2 and the third space 3 framed in this embodiment, which are specifically: the lateral space at the slot opening of the second mounting slot 12 and close to the isolation slot wall 14 is the first space 1; the lateral space below the first space 1 is the horizontal portion 4 of the second space 2; the vertical space below the horizontal portion 4 of the second space 2 is the vertical portion 5; and the third space 3 is below the horizontal portion 4 of the second space 2 and on the side of the vertical portion 5 away from the isolation slot wall 14.

[0061] Continue to refer to Figures 5 to 11 As shown, this embodiment also provides a magnetic latching relay, including a housing and a magnetic circuit portion 21 and a contact portion 22 arranged in the housing, wherein the housing includes a base 10, an insulating block 30 and a first shell 41, the base 10 is the relay base described above, the coil 211 of the magnetic circuit portion 21 is assembled in the first mounting groove 11, specifically, the magnetic circuit portion 21 is assembled in the first mounting groove 11, and the contact portion 22 has two groups, which are respectively assembled in the second mounting groove 12 and the third mounting groove 13, forming a dual-way switching magnetic latching relay. Among them, the lead pin 212 of the coil 211 is arranged on the side of the coil frame facing the second mounting groove 12. Of course, in other embodiments, if only one group of contact portions 22 is provided, the base 10 may not have the structure of the third mounting groove 13. Specifically, when the relay base does not have the third mounting slot 13, the contact portion 22 is arranged at only one end of the magnetic circuit portion 21, and the lead pin 212 is usually led out at the end away from the contact portion 22, so there is no need for isolation, but it does not exclude the possibility that some lead pins 212 still need to be led out from the end close to the contact portion 22. This embodiment is described based on the case where the contact portions 22 are arranged at both ends of the magnetic circuit portion 21.

[0062] The insulating block 30 constitutes an insulating component, which includes a horizontal insulating portion 31 and a vertical insulating portion 32 connected to each other. The vertical insulating portion 32 is inserted into the vertical portion 5 of the second space 2, and the horizontal insulating portion 31 is placed in the horizontal portion 4 of the second space 2; the lead pin 212 of the coil 211 extends into the first space 1 above the horizontal insulating portion 31 and extends horizontally out of the base 10 from the rear side of the base 10; the contact portion 22 is assembled in the third space 3, and the first shell 41 covers the base 10.

[0063] In this way, in the length direction of the magnetic latching relay, the contact portion 22 in the third space 3 and the coil enameled wire wound to form the coil 211 are separated not only by the isolation slot wall 14, but also by an additional vertical isolation portion 32 of the insulating block 30. The contact portion 22 in the third space 3 and the lead pin 212 of the coil 211 are also separated by the vertical isolation portion 32 of the insulating block 30. Figure 6 As shown, the isolation slot wall 14 and the vertical insulating portion 32 form a creepage path a similar to a "U" shape, which greatly increases the creepage distance between the coil enameled wire, the lead pin 212 of the coil 211 and the contact portion 22. In the height direction, a horizontal insulating portion 31 of an insulating block 30 is added between the lead pin 212 of the coil 211 and the contact portion 22, so that the creepage path between the lead pin 212 of the coil 211 and the contact portion 22 is also increased in the vertical direction, such as Figure 6 The creepage path b shown. The base 10 and the insulating block 30 cooperate to allow the magnetic circuit portion 21 and the contact portion 22 to be arranged in close proximity, thereby reducing the length of the relay while having a high withstand voltage characteristic.

[0064] Specifically, the vertical portion 32 is close to one side of the first mounting groove 11, so that the third space 3 also extends to the bottom of the horizontal portion 31, so that the lead pin 212 and the contact portion 22 of the coil 211 can be arranged up and down, and the structure is compact. That is, the contact portion 22 can be as close as possible to the side where the coil 211 is located, making the structural layout more compact, which is more conducive to ensuring that the relay achieves a smaller volume.

[0065] The height of the isolation groove wall 14 is lower than the height of the outer wall of the relay base (i.e., the base 10), thereby forming a clearance gap 141 that is laterally connected to the first space 1, so that the first space 1 is laterally connected to the first mounting groove 11. The setting of the clearance gap 141 makes it easier for the lead pin 212 of the coil 211 to extend to the first space 1.

[0066] The second mounting groove 12 of the base 10 further includes a mounting portion protruding therein, and the insulating block 30 is supported on the mounting portion. Figure 1 As shown, the mounting portion is a convex column 15, and a plug hole 151 is provided on the convex column 15. Fig.10 and Fig.11 As shown, the bottom of the horizontal insulating portion 31 of the insulating block 30 has a downwardly extending plug post 33, and the plug post 33 is fixedly inserted into the socket 151 of the boss 15 by means of, but not limited to, interference fit. In this way, the insulating block is supported on the mounting portion, thereby achieving a stable assembly of the insulating block 30.

[0067] At the same time, the boss 15 is spaced apart from the isolation slot wall 14 and constitutes a part of the vertical portion 5 of the second space 2. The vertical insulating portion 32 of the insulating block 30 is also inserted between the boss 15 and the isolation slot wall 14 to play a certain positioning role.

[0068] like Figure 8 As shown, the fixed ends of the movable spring piece and the movable spring lead-out piece in the contact portion 22 are clamped between the boss 15 and the groove wall of the second mounting groove 12 , which is beneficial to the stable installation of the contact portion 22 .

[0069] like Figure 1 and Figure 8 As shown, the rear groove wall of the second mounting groove 12 is provided with a mounting opening 16 corresponding to the first space 1, and the lead pin 212 extends out of the housing through the mounting opening 16. Specifically, the lead pin 212 extends out of the rear side wall of the base 10 through the mounting opening 16 to achieve connection with the outside.

[0070] like Fig. 9 and Fig.10 As shown, at least one isolation rib 34 is protruded from the upper surface of the horizontal isolation portion 31 of the insulating block 30, and the isolation rib is located on the side of the lead pin 212 away from the first mounting groove 11 and / or on the side of the lead pin 212 away from its lead-out direction (i.e., the opposite side of the mounting opening 16). As in this specific embodiment, the number of isolation ribs 34 is two, and each isolation rib 34 includes a first isolation portion 341 located on the side of the lead pin 212 away from the first mounting groove 11 and a second isolation portion 342 located on the side of the lead pin 212 away from its lead-out direction, and the first isolation portion 341 and the second isolation portion 342 constitute an L-shaped isolation rib 34. The two isolation ribs 34 are arranged at intervals. It can effectively increase the creepage distance between the lead pin 212 portion located in the first space 1 and the contact portion 22 in the above-mentioned two directions.

[0071] Furthermore, the isolation rib 34 is higher than the highest position of the lead pin 212 in the first space 1, thus achieving more effective isolation.

[0072] Further, if Figure 6 As shown, the first shell 41 also extends between the two isolation ribs 34 to form a convex rib 411; the two isolation ribs 34 and the convex rib 411 constitute a "W"-shaped creepage path b; such a configuration further lengthens the creepage distance between the lead pin 212 of the coil 211 and the contact portion 22, and the isolation effect is better.

[0073] At the same time, the two isolation ribs 34 cooperate with the rear side wall of the base 10 in the following manner: Fig. 9As shown, the rear side wall of the base 10 has at least two step surfaces 17 arranged along the lead-out direction of the lead pin 212, and the isolation ribs 34 are respectively in contact with the at least two step surfaces 17, which can effectively reduce the matching gap with the rear side wall of the base 10, and further increase the creepage distance between the portion of the lead pin 212 of the coil 211 extending toward the rear side of the base 10 and the contact portion 22 in the third space 3.

[0074] The setting of the above-mentioned isolation ribs 34 is a more preferred structure in this embodiment. Of course, it is not limited to this in other embodiments. For example, the number of isolation ribs 34 can be one or more than two, and the structure of each isolation rib 34 can be only the above-mentioned first isolation part 341 or the first isolation part 341, etc.

[0075] Embodiment 2

[0076] Reference Figures 12 to 16 As shown, this embodiment provides a magnetic latching relay, which differs from the first embodiment only in the lead-out direction of the lead-out pin 212 of the coil 211 and the composition of the insulating member. Specifically, the magnetic latching relay in this embodiment includes a housing and a magnetic circuit portion 21 and a contact portion 22 arranged in the housing. The housing includes a base 10 and a second housing 42. The base 10 is the relay base described in the first embodiment (i.e. Figure 1 and Figure 2 The coil 211 of the magnetic circuit part 21 is mounted in the first mounting groove 11. Specifically, the magnetic circuit part 21 is mounted in the first mounting groove 11. The contact part 22 has two groups, which are respectively mounted in the second mounting groove 12 and the third mounting groove 13, forming a dual-way switching magnetic latching relay. Among them, the lead pin 212 of the coil 211 is close to the direction of the second mounting groove 12. Of course, in other embodiments, if only one group of contact parts 22 is provided, the base 10 may not have the structure of the third mounting groove 13.

[0077] Specifically, the contact portion 22 is assembled in the third space 3 of the second mounting groove 12, the second shell 42 covers the base 10, and the second shell 42 is provided with a retaining wall 421 extending downward, and the retaining wall 421 constitutes an insulating component, which is suitable for passing through the horizontal parts 4 of the first space 1 and the second space 2 and being inserted in the vertical part 5 of the second space 2; the lead pin 212 of the coil 211 extends upward and extends out of the second shell 42, that is, extends upward from the second shell 42.

[0078] like Fig.12As shown, the setting of the retaining wall 421 of the second housing 42 provides a "U"-shaped creepage distance c between the lead pin 212 of the coil 211 and the contact portion 22, which greatly increases the creepage distance between the lead pin 212 of the coil 211 and the contact portion 22. At the same time, the lead pin 212 of the coil 211 extends upward and passes through the second housing 42, so as to be led out from the top. In summary, the effective isolation of the coil 211 and the contact portion 22, as well as the effective isolation of the lead pin 212 and the contact portion 22 are achieved; thereby ensuring that the contact portion 22 of the third space 3 can be compactly arranged with the coil 211 to reduce the length of the relay.

[0079] Specifically, Fig.14 and Fig.15 As shown, a fixing boss 422 is raised on the upper surface of the second shell 42, and a through hole 423 is opened on the fixing boss 422 and penetrates to the lower surface of the second shell 42. The lead pin 212 of the coil 211 is inserted into the through hole 423 of the fixing boss 422, so that the lead pin 212 of the coil 211 can be stably installed.

[0080] The relay base provided in the present application is compact enough to install the magnetic circuit part 21 and the contact part 22 and ensure the insulation performance; at the same time, the relay base can adapt to the structure in which the lead pin 212 of the coil 211 is led out from the side and from the top, and has good adaptability. Specifically, in the relay base, the second mounting groove 12 is adjacently arranged on one side of the first mounting groove 11, and the lead pin 212 of the coil 211 installed in the first mounting groove 11 can extend into the second mounting groove 12, and the second mounting groove 12 is provided with a first space 1, a second space 2 and a third space 3, wherein the first space 1 is located above the second space 2, which is suitable for the lead pin 212 of the coil 211 to be placed therein; the second space 2 is suitable for the placement of an external insulating component, and includes a communicating horizontal part 4 and a vertical part 5, the horizontal part 4 is located below the first space 1, and the vertical part 5 is located below the horizontal part 4, so that the first space 1, the horizontal part 4 of the second space 2 and the vertical part 5 of the second space 2 are correspondingly connected in the vertical direction; the third space 3 is located on the side of the vertical part 5 away from the first mounting groove 11, and is used to install the contact part 22. Based on the above structure, when the relay base is actually used, an insulating component can be set in the second space 2 to isolate the lead pin 212 of the coil 211 located in the first space 1 and the contact part 22 located in the third space 3, thereby increasing the creepage distance between the lead pin 212 of the coil 211 and the contact part 22. In this way, electrical breakdown between the lead pin 212 of the coil 211 and the contact part 22 can be prevented without increasing the size of the base, thereby improving the voltage resistance performance of the relay and ensuring the electrical safety of the relay.

[0081] In addition, the above relay base has good versatility, and can be used for installation of coils 211 of different forms. The different forms of coils 211 specifically refer to different lead-out directions of the lead-out pins 212 of the coils 211. At the same time, the electrical isolation between the magnetic circuit part 21 (especially the lead-out pins 212 of the coils 211) and the contact part 22 can be achieved for the different forms of coils 211. Specifically, when the lead-out pins 212 of the coils 211 used in conjunction with the relay base are extended from the outer end surface of the coil frame in a direction perpendicular to the axial direction of the coil 211, In the form of, the base 10 can allow an external insulating component to be installed and used to increase the creepage distance. The external insulating component only needs to be inserted into the first space 1, the horizontal part 4 of the second space 2 and the vertical part 5 of the second space 2 at least in the vertical direction, so as to separate the lead pin 212 of the coil 211 and the contact part 22 on both sides, so that a creepage path that needs to bypass the external insulating component is formed between the lead pin 212 of the coil 211 and the contact part 22, thereby lengthening the creepage distance between the lead pin 212 of the coil 211 and the contact part 22 and achieving electrical isolation. When the lead pin 212 of the coil 211 used in conjunction with the relay base is in the form of extending and bending from the outer end surface of the coil frame along the axial direction of the coil 211 to the side away from the winding, the base 10 can still increase the creepage distance by allowing the installation of an external insulating component. The external insulating component only needs to be placed in the second space 2 from the first space 1 and is constructed so that the horizontal part 4 and the vertical part 5 of the second space 2 correspond to the insulating part to separate the lead pin 212 of the coil 211 and the contact part 22, wherein the insulating part located in the horizontal part 4 of the second space 2 can isolate the contact part 22 in the vertical direction. The lead pin 212 and the contact portion 22 of the coil 211, so even if the contact portion 22 is arranged below the horizontal portion 4 of the second space 2, the electrical isolation of the lead pin 212 and the contact portion 22 of the coil 211 can be achieved, that is, the relay base allows the contact portion 22 to be arranged as close to the side of the first mounting groove 11 as possible, to achieve a compact layout, and provide conditions for realizing the small size of the relay; the external insulating member is located in the vertical portion 5 of the second space 2, which can isolate the coil 211 and the contact portion 22 in the horizontal direction, further improving the creepage distance.

[0082] Therefore, the relay base provided by the present technical solution can not only ensure that the lead pin 212 of the coil 211 and the contact part 22 have good pressure resistance, but also ensure that the coil 211 and the contact part 22 of the relay can be compactly arranged; in addition, the relay base also has good versatility and can be adapted to different forms of coils 211, and no matter which form of coil 211 is adapted, it can allow the coil 211 and the contact part 22 to form a good pressure resistance effect without increasing the volume.

[0083] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A relay base, comprising a first mounting groove and a second mounting groove arranged adjacent to each other, wherein the first mounting groove is used to mount a coil, and an isolation groove wall is provided between the first mounting groove and the second mounting groove; characterized in that: The second mounting groove is provided with a first space, a second space and a third space. The second space is suitable for placing an external insulating component, and comprises a horizontal part and a vertical part which are connected. The first space is located above the horizontal part, and is suitable for the lead-out pins of the coil to extend therein. The vertical part is located below the horizontal part. The third space is located on the side of the vertical part which is away from the first mounting groove, and is used for installing the contact part.

2. The relay base according to claim 1, characterized in that: The vertical portion is close to one side of the first installation groove; and the third space at least partially extends to the bottom of the horizontal portion.

3. The relay base according to claim 1, characterized in that: The height of the isolation groove wall is lower than the height of the outer wall of the relay base, thereby forming a gap that is laterally connected to the first space, so that the first space is laterally connected to the first installation groove.

4. The relay base according to claim 1, characterized in that: The rear groove wall of the second installation groove is provided with an installation opening corresponding to the first space.

5. A magnetic latching relay, comprising a housing and a magnetic circuit portion and a contact portion arranged in the housing, characterized in that: The shell includes a base, an insulating block and a first shell, the base is the relay base described in any one of claims 1 to 4 above, the coil of the magnetic circuit part is assembled in the first mounting groove, the insulating block constitutes an insulating component, which includes a horizontal insulating part and a vertical insulating part connected to each other, the vertical insulating part is inserted in the vertical part of the second space, and the horizontal insulating part is placed in the horizontal part of the second space; the lead pins of the coil extend to the first space above the horizontal insulating part and extend horizontally from the rear side of the base; the contact part is assembled in the third space, and the first shell covers the base.

6. The magnetic latching relay according to claim 5, characterized in that: The upper surface of the horizontal insulating portion of the insulating block is protruded with at least one isolation rib, which is located on the side of the lead-out pin of the coil away from the first mounting groove and / or on the side of the lead-out pin of the coil away from its lead-out direction.

7. The magnetic latching relay according to claim 6, characterized in that: The isolation rib comprises a first isolation portion located on a side of the lead-out pin of the coil away from the first installation slot and a second isolation portion located on a side of the lead-out pin of the coil away from a lead-out direction thereof.

8. The magnetic latching relay according to claim 6, characterized in that: The isolation rib is higher than the highest position of the lead-out pins of the coil located in the first space.

9. The magnetic latching relay according to claim 6, characterized in that: The number of the isolation ribs is at least two, and the first shell further extends between two adjacent isolation ribs to form a convex rib.

10. The magnetic latching relay according to claim 9, characterized in that: The rear side wall of the base has at least two step surfaces arranged along the lead-out direction of the lead-out pins, and each of the isolation ribs is in contact with the at least two step surfaces respectively.

11. The magnetic latching relay according to claim 5, characterized in that: A mounting portion is also protruded in the second mounting groove of the base, and the insulating block is supported on the mounting portion.

12. The magnetic latching relay according to claim 11, characterized in that: The mounting portion is provided with an insertion hole, and the insulating block has an insertion column, and the insertion column is fixedly inserted in the insertion hole.

13. The magnetic latching relay according to claim 12, characterized in that: The plug post is formed at the bottom of the horizontal insulating portion of the insulating block and extends downward.

14. The magnetic latching relay according to claim 11, characterized in that: The mounting portion is spaced apart from the isolation groove wall, and the space formed by the space constitutes a part of the vertical portion of the second space.

15. The magnetic latching relay according to claim 11, characterized in that: The fixed ends of the movable spring piece and the movable spring lead-out piece in the contact portion are clamped between the mounting portion and the groove wall of the second mounting groove.

16. A magnetic latching relay, comprising a housing, a magnetic circuit portion and a contact portion arranged in the housing, characterized in that: The housing includes a base and a second shell, the base is the relay base as described in any one of claims 1 to 3 above, the coil of the magnetic circuit part is assembled in the first mounting groove, the contact part is assembled in the third space, the second shell covers the base, the second shell is provided with a retaining wall extending downward, the retaining wall constitutes the insulating component, which is suitable for passing through the horizontal parts of the first space and the second space and being inserted in the vertical part of the second space; the lead pins of the coil extend upward and extend out of the second shell.

17. The magnetic latching relay according to claim 16, characterized in that: A fixing boss is raised on the upper surface of the second shell. A through hole is formed on the fixing boss and passes through to the lower surface of the second shell. The lead pins of the coil are inserted into the through hole of the fixing boss.

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