Insulated base and relay

Abstract

To provide an electromagnetic relay that can reduce the electric arc between the stationary contact and the movable contact of a relay to a predetermined length, quickly extinguish the electric arc, and greatly improve the magnetic extinguishing effect of the relay.SOLUTION: An insulating base includes a peripheral wall (11), a bottom wall (12) connected to the bottom of the peripheral wall (11), and a partition wall (13) connected to the peripheral wall (11) and the bottom wall (12). The partition wall (13) is used to divide the internal space defined by the housing (2) and the insulating base into a containment chamber (10a) and an arc-extinguishing chamber (10b). Two recesses (101) are formed inside the bottom wall (12) of the arc-extinguishing chamber (10b), such that the electric arc between the stationary contact and the movable contact of the relay can be pulled down into the recesses (101) to increase the length of the pulled-down electric arc.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of Chinese Patent Application No. CN202410432857.4, filed with the State Intellectual Property Office of China on April 10, 2024, the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to an insulating base for a relay and to a relay comprising an insulating base. [Background technology]

[0003] In the prior art, electromagnetic relays typically include an insulating base, a movable contact, a stationary contact, and a movable leaf spring. The insulating base includes a peripheral wall, a bottom wall, and a partition wall. The partition wall divides the space within the insulating base into a containment chamber and an arc-extinguishing chamber. The movable contact, the stationary contact, and the movable leaf spring are located in the arc-extinguishing chamber. The movable contact is fixed to an end of the movable leaf spring. To increase the length of the movable leaf spring, the end of the movable leaf spring is usually moved closer to the bottom wall of the insulating base, which results in a too short distance between the movable contact and the bottom wall of the insulating base. When magnetically quenching an electric arc, the length of the electric arc that can be drawn down between the movable contact and the stationary contact is limited, making it difficult to extend the electric arc to a predetermined length, which reduces the effectiveness of magnetic quenching and may even result in poor arc extinguishing. If the electric arc cannot be extinguished quickly, the high temperatures generated by the electric arc will melt the moving and stationary contacts and even cause the electromagnetic relay to explode, which will have a serious impact on manufacturing safety.

[0004] Additionally, in the prior art, the relay further includes a yoke, an armature, an insulator, and a connecting piece. The armature is movably attached to the yoke and can swing between an attracted position and an initial position relative to the yoke. One end of the armature is connected to the insulator. One end of the connecting piece is bonded to the insulator. The insulator electrically insulates the armature from the connecting piece. A movable leaf spring of the relay is riveted to the other end of the connecting piece. In the prior art, the need to provide a separate connecting piece increases the number of parts of the relay, thereby increasing costs. Furthermore, riveting the movable leaf spring and the connecting piece reduces manufacturing efficiency.

[0005] Additionally, in the prior art, relays further include a return leaf spring for returning the armature from the attracted position to the initial position. The return leaf spring is typically fixed to a partition wall of the insulating base. Because the insulating base is typically made of plastic, the mechanical strength and wear resistance of the insulating base are low. Frequent movement of the return leaf spring can easily damage or wear the partition wall of the insulating base. Plastic dust generated by wear can affect the electrical contact performance between the moving contact and the stationary contact. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made to overcome or mitigate at least one aspect of the above disadvantages. [Means for solving the problem]

[0007] According to an aspect of the present invention, there is provided an insulating base for mounting in a bottom opening of a relay housing. The insulating base includes a peripheral wall, a bottom wall connected to the bottom of the peripheral wall, and a partition wall connected to the peripheral wall and the bottom wall. The partition wall is used to divide the internal space defined by the housing and the insulating base into a containment chamber and an arc-extinguishing chamber, and two recesses are formed inside the bottom wall of the arc-extinguishing chamber, thereby allowing an electric arc between a stationary contact and a movable contact of the relay to be pulled down into the recesses, thereby increasing the length of the pulled down electric arc.

[0008] According to an exemplary embodiment of the present invention, the insulating base has a lateral direction, a longitudinal direction, and a height direction, the partition wall extends along the lateral direction and the height direction, and the two recesses are arranged side by side in the lateral direction.

[0009] According to another exemplary embodiment of the present invention, the insulating base further includes two magnet holding portions formed in the arc-extinguishing chamber for holding two arc-extinguishing magnets of the relay, the two magnet holding portions being laterally opposite to each other, and the two recesses being located between the two magnet holding portions.

[0010] According to another exemplary embodiment of the present invention, the magnet holders are connected to the bottom wall and the partition wall, and slots for inserting arc-extinguishing magnets are formed in each of the two magnet holders, and the two arc-extinguishing magnets of the relay are configured to be inserted into the slots of the two magnet holders, respectively.

[0011] According to another exemplary embodiment of the present invention, the slot has an insertion opening located on the outside of the bottom wall, through which the arc-extinguishing magnet can be inserted into the slot of the magnet holder.

[0012] According to another exemplary embodiment of the present invention, the inner wall surface of the slot is suitable for interference-fitting onto the arc-extinguishing magnet to fix the arc-extinguishing magnet to the slot.

[0013] According to another exemplary embodiment of the present invention, there is a gap between the inner wall surface of the slot and the arc-extinguishing magnet, and a sealant is injected into the insertion opening of the slot to seal the insertion opening of the slot and fix the arc-extinguishing magnet to the slot.

[0014] According to another exemplary embodiment of the present invention, the insulating base further includes two terminal holding portions formed in the arc-extinguishing chamber for holding two stationary terminals of the relay, the two terminal holding portions being arranged side by side in the lateral direction and spaced apart opposite the partition wall.

[0015] According to another exemplary embodiment of the present invention, the terminal holders are connected to the peripheral wall and the bottom wall, and terminal slots for inserting static terminals are formed in each of the two terminal holders, and the two static terminals of the relay are configured to be inserted into the terminal slots of the two terminal holders, respectively.

[0016] According to another exemplary embodiment of the present invention, an opening communicating with the terminal slot is formed in the bottom wall, and a portion of the stationary terminal can protrude from the insulating base through the opening in the bottom wall.

[0017] According to another aspect of the present invention, there is provided a relay comprising: a housing having a bottom opening; the insulating base mounted in the bottom opening of the housing; two stationary contacts located in an arc-extinguishing chamber; two movable contacts located in the arc-extinguishing chamber for electrically contacting the two stationary contacts, respectively; and two arc-extinguishing magnets located in the arc-extinguishing chamber for extinguishing an electric arc between the stationary contacts and the movable contact by magnetic blow. Two recesses in the bottom wall of the arc-extinguishing chamber are located below the two movable contacts and between the two arc-extinguishing magnets, respectively, so that the electric arc between the stationary contacts and the movable contact can be pulled down into the recesses by the magnetic field between the two arc-extinguishing magnets.

[0018] According to an exemplary embodiment of the present invention, the arc-extinguishing magnet is inserted into a slot in the magnet holder of the insulating base, and a sealant is injected into the insertion opening of the slot to seal the insertion opening of the slot and hold the arc-extinguishing magnet in the slot.

[0019] According to another exemplary embodiment of the present invention, the two arc-extinguishing magnets are rectangular in shape and face each other laterally of the insulating base, with the facing surfaces of the two arc-extinguishing magnets having opposite polarities.

[0020] According to another exemplary embodiment of the present invention, the relay further includes two stationary terminals respectively inserted into the terminal slots of the two terminal holding portions of the insulating base and extending from the bottom wall of the insulating base, and the two stationary contacts are respectively fixed to the two stationary terminals and electrically connected to the two stationary terminals.

[0021] According to another exemplary embodiment of the present invention, the relay further includes a movable terminal located in the arc-extinguishing chamber, and two movable contacts are fixed to both ends of the movable terminal and electrically connected to the movable terminal, and when the two movable contacts move to a closed position where they are in electrical contact with the two stationary contacts, the two stationary terminals are electrically connected to each other via the movable terminal.

[0022] According to another exemplary embodiment of the present invention, the relay further includes a yoke provided in the accommodating chamber and fixed to the insulating base, a magnetic core mounted in the accommodating chamber, the magnetic core having a lower end fixed to the yoke, and an armature assembly including an armature movably mounted on the yoke and pivotable relative to the yoke between an initial position and an attracted position, a movable leaf spring connected to the movable terminal and configured to apply a resilient contact force to the movable contact, and an insulator, the armature and the movable leaf spring being fixed to the insulator and electrically insulated from each other by the insulator.

[0023] According to another exemplary embodiment of the present invention, the insulator is an injection molded part formed directly onto the armature and the movable leaf spring by an embedded injection molding process, thus the armature, the movable leaf spring, and the insulator are integrated into one part.

[0024] According to another exemplary embodiment of the present invention, the armature and the movable leaf spring are bonded to the upper and lower sides of the insulator, respectively, and grooves and / or ribs are formed on the front and rear sides of the insulator, respectively, to increase the creepage distance between the armature and the movable leaf spring.

[0025] According to another exemplary embodiment of the present invention, a movable leaf spring includes a sheet and a plurality of bent wings connected to one end of the sheet and bent perpendicularly to the sheet, wherein the one end of the sheet and the plurality of bent wings are bonded within an insulator to increase the bonding force between the movable leaf spring and the insulator.

[0026] According to another exemplary embodiment of the present invention, the armature includes a plate-like body and a bent portion connected to one end of the plate-like body and bent perpendicular to the plate-like body, the bent portion being bonded within the insulator, and the plate-like body is configured to be movably attached to the yoke.

[0027] According to another exemplary embodiment of the present invention, the relay further includes a return leaf spring, which is fixed to the yoke, pressed against the armature, and used to return the armature from the attracted position to the initial position, and the magnetic core and the return leaf spring are respectively disposed on both sides of the yoke, and the magnetic core is used to apply an electromagnetic attractive force to the armature, and the return leaf spring is used to apply an elastic return force to the armature.

[0028] According to another exemplary embodiment of the present invention, the yoke includes a vertical plate having a notch formed at an upper end thereof and a horizontal plate connected to a lower end thereof, and a neck formed on the plate-like body of the armature, the neck being movably engaged with the notch of the yoke.

[0029] According to another exemplary embodiment of the present invention, the return leaf spring includes a vertical spring piece fixed to the vertical plate of the yoke, and a pressure spring piece connected to the upper end of the vertical spring piece and bent at a predetermined angle relative to the vertical spring piece. An attachment hole through which the vertical spring piece can pass is formed at one end of the plate-shaped body of the armature, and the pressure spring piece is pressed against one side of the attachment hole of the armature to apply an elastic return force to the armature.

[0030] According to another exemplary embodiment of the present invention, a snap slot is formed in the vertical plate of the yoke, and a resilient buckle is formed in the vertical spring piece of the return leaf spring, and the resilient buckle engages with the snap slot to secure the return leaf spring to the yoke.

[0031] According to another exemplary embodiment of the present invention, a vertical slot is formed in the partition wall of the insulating base on one side opposite to the vertical plate of the yoke, and the vertical spring piece of the return leaf spring is inserted into the vertical slot in the partition wall.

[0032] According to another exemplary embodiment of the present invention, the return leaf spring further includes a limiting spring piece connected to the upper end of the vertical spring piece and located above the other side of the mounting hole of the armature, and the limiting spring piece is used to restrain the neck of the armature in the notch of the yoke, thereby preventing the armature from coming off the yoke.

[0033] According to another exemplary embodiment of the present invention, the relay further includes a coil assembly including a coil skeleton having a central through-hole, a coil wound around the coil skeleton, and two coil terminals fixed to the coil skeleton and connected to both ends of the coil. The magnetic core is attached to the central through-hole of the coil skeleton, and an upper end of the magnetic core is exposed from the outside of the coil skeleton so as to attract the armature.

[0034] According to another exemplary embodiment of the present invention, when the coil is energized, the armature is attracted to an attracted position by the electromagnetic attractive force of the magnetic core, and the two movable contacts move to a closed position in which they are in electrical contact with the two stationary contacts, respectively; when the coil is de-energized, the electromagnetic attractive force applied to the armature disappears, the armature returns to its initial position by the elastic restoring force of the return leaf spring, and the two movable contacts move to an open position in which they are separated from the two stationary contacts.

[0035] According to another exemplary embodiment of the present invention, the peripheral wall of the insulating base is inserted into the housing through the bottom opening of the housing, protrusions are formed on the outside of the peripheral wall of the insulating base, slot holes are formed in the peripheral wall of the housing, and the protrusions engage with the slot holes to secure the housing to the insulating base.

[0036] According to another exemplary embodiment of the present invention, a positioning step is formed on the outer side of the peripheral wall of the insulating base, and the positioning step is pressed against the bottom surface of the housing to position the housing in the height direction of the insulating base.

[0037] In the above exemplary embodiment of the present invention, the electric arc between one movable contact and one stationary contact of the relay can be pulled down into the recess in the bottom wall of the arc-extinguishing chamber by the magnetic field between the two arc-extinguishing magnets, thereby increasing the length of the pulled down electric arc and quickly extinguishing the electric arc, thereby significantly improving the magnetic extinguishing effect of the relay.

[0038] In the above exemplary embodiments according to the present invention, the movable leaf spring is directly bonded to the insulator, which reduces the number of parts in the relay, simplifies the structure of the relay, reduces the cost of the relay, and improves the manufacturing efficiency of the relay.

[0039] In the above exemplary embodiment according to the present invention, the return leaf spring is fixed to the yoke, so frequent movement of the return leaf spring does not affect the insulating base and will not destroy or wear it, thereby extending the life and reliability of the relay.

[0040] These and other features of the present invention will become more apparent from the detailed description of illustrative embodiments taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0041] [Figure 1] FIG. 1 is an illustrative perspective view of a relay in accordance with an exemplary embodiment of the present invention. [Figure 2] 1 is a cross-sectional view of a relay according to an exemplary embodiment of the present invention; [Figure 3] 2 is a longitudinal cross-sectional view of an insulating base and housing of a relay according to an exemplary embodiment of the present invention. FIG. [Figure 4] 1 is a cross-sectional side view of a relay according to an exemplary embodiment of the present invention, without showing the housing; [Figure 5] 1 is a longitudinal cross-sectional view of a relay according to an exemplary embodiment of the present invention, without showing the housing; [Figure 6] 1 is a cross-sectional plan view of a relay in accordance with an exemplary embodiment of the present invention, with the movable contact and the stationary contact in an open position, electrically isolated; [Figure 7] 1 is a cross-sectional plan view of a relay in accordance with an exemplary embodiment of the present invention in a closed position in which the movable contact and the stationary contact are in electrical contact; [Figure 8] FIG. 1 is a diagrammatic perspective view of a relay module in accordance with an exemplary embodiment of the present invention; [Figure 9] 1 is a cross-sectional view of a relay module according to an exemplary embodiment of the present invention; [Figure 10] FIG. 2 is an illustration of an exploded view of a relay module in accordance with an exemplary embodiment of the present invention. [Figure 11] 1 is an exploded cross-sectional view of a relay module in accordance with an exemplary embodiment of the present invention; [Figure 12] FIG. 2 is an illustration of an exploded view of a relay armature assembly in accordance with an exemplary embodiment of the present invention. [Figure 13] FIG. 2 is an illustrative assembly view of a yoke and return leaf spring of a relay in accordance with an exemplary embodiment of the present invention. [Figure 14] FIG. 2 is a diagrammatic perspective view of a return leaf spring of a relay in accordance with an exemplary embodiment of the present invention; [Figure 15] FIG. 2 is a cross-sectional view of a return leaf spring of a relay in accordance with an exemplary embodiment of the present invention. [Figure 16] FIG. 2 is a cross-sectional view of a yoke and return leaf spring of a relay in accordance with an exemplary embodiment of the present invention. [Figure 17] FIG. 2 is a cross-sectional view of a yoke, return leaf spring, and insulating base of a relay in accordance with an exemplary embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0042] Exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. Like reference numerals refer to like elements throughout the drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the disclosure to those skilled in the art.

[0043] In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are diagrammatically shown to simplify the drawings.

[0044] According to a general concept of the present invention, there is provided an insulating base for mounting in a bottom opening of a relay housing. The insulating base includes a peripheral wall, a bottom wall connected to the bottom of the peripheral wall, and a partition wall connected to the peripheral wall and the bottom wall. The partition wall is used to divide the internal space defined by the housing and the insulating base into a containment chamber and an arc-extinguishing chamber, and two recesses are formed inside the bottom wall of the arc-extinguishing chamber, thereby allowing an electric arc between a stationary contact and a movable contact of the relay to be pulled down into the recesses, thereby increasing the length of the pulled down electric arc.

[0045] According to another general aspect of the present invention, there is provided a relay comprising: a housing having a bottom opening; an insulating base mounted in the bottom opening of the housing; two stationary contacts located in an arc-extinguishing chamber; two movable contacts located in the arc-extinguishing chamber for electrically contacting the two stationary contacts, respectively; and two arc-extinguishing magnets located in the arc-extinguishing chamber for extinguishing an electric arc between the stationary contacts and the movable contact by magnetic blow. Two recesses in the bottom wall of the arc-extinguishing chamber are located below the two movable contacts and between the two arc-extinguishing magnets, respectively, so that the electric arc between the stationary contacts and the movable contact can be pulled down into the recesses by the magnetic field between the two arc-extinguishing magnets.

[0046] In accordance with another general aspect of the present invention, there is provided a relay armature assembly including: an armature adapted to be movably mounted on a yoke of a relay and pivotable relative to the yoke between an initial position and an attracted position; a movable leaf spring connected to a movable contact assembly of the relay and configured to apply a resilient contact force to the movable contact assembly; and an insulator, wherein the armature and the movable leaf spring are fixed to and electrically insulated from each other by the insulator.

[0047] According to another general aspect of the present invention, there is provided a relay module comprising: a yoke fixed to an insulating base of a relay; a magnetic core having a lower end fixed to the yoke; a relay armature assembly, the armature movably attached to the yoke and swingable between an attracting position in contact with an upper end of the magnetic core and an initial position separated from the upper end of the magnetic core; and a return leaf spring fixed to the yoke, pressed against the armature, and used to return the armature from the attracting position to the initial position. The magnetic core and the return leaf spring are respectively disposed on opposite sides of the yoke, the magnetic core being used to apply an electromagnetic attractive force to the armature, and the return leaf spring being used to apply an elastic return force to the armature.

[0048] According to another general aspect of the present invention, there is provided a relay comprising a housing having a bottom opening, the above-described relay module disposed in the housing, an insulating base mounted in the bottom opening of the housing, and two stationary contact assemblies fixed to the insulating base for electrically contacting the movable contact assembly.

[0049] FIG. 1 is an illustrative perspective view of a relay according to an exemplary embodiment of the present invention. FIG. 2 is a transverse cross-sectional view of a relay according to an exemplary embodiment of the present invention. FIG. 3 is a longitudinal cross-sectional view of an insulating base 1 and a housing 2 of a relay according to an exemplary embodiment of the present invention. FIG. 4 is a transverse cross-sectional view of a relay according to an exemplary embodiment of the present invention without showing the housing 2. FIG. 5 is a longitudinal cross-sectional view of a relay according to an exemplary embodiment of the present invention without showing the housing 2. FIG. 6 is a cross-sectional plan view of a relay according to an exemplary embodiment of the present invention in an open position where the movable contact 4a and the stationary contact 5a are electrically separated. FIG. 7 is a cross-sectional plan view of a relay according to an exemplary embodiment of the present invention in a closed position where the movable contact 4a and the stationary contact 5a are in electrical contact.

[0050] As shown in FIGS. 1 to 7 , an exemplary embodiment of the present invention discloses an insulating base 1. The insulating base 1 is used to be attached to a bottom opening of a housing 2 of a relay. The insulating base 1 includes a peripheral wall 11, a bottom wall 12, and a partition wall 13. The bottom wall 12 is connected to the bottom of the peripheral wall 11. The partition wall 13 is connected to the peripheral wall 11 and the bottom wall 12. The partition wall 13 is used to divide the internal space defined by the housing 2 and the insulating base 1 into a containment chamber 10a and an arc-extinguishing chamber 10b. Two recesses 101 are formed inside the bottom wall 12 of the arc-extinguishing chamber 10b. Therefore, an electric arc 1c between one stationary contact 5a and one movable contact 4a of the relay can be drawn down into one of the recesses 101, thereby increasing the length of the drawn-down electric arc 1c.

[0051] As shown in FIGS. 1 to 7 , in the illustrated embodiment, the electric arc 1c between one movable contact 4a and one stationary contact 5a of the relay can be pulled downward into the recess 101 in the bottom wall 12 of the arc-extinguishing chamber 10b by the magnetic field between the two arc-extinguishing magnets 6. This increases the length of the pulled-down electric arc 1c, thereby enabling it to be quickly extinguished, significantly improving the magnetic extinguishing effect of the relay. In addition, the electric arc between the other stationary contact 5a and the other movable contact 4a of the relay is stretched upward by the magnetic field between the two arc-extinguishing magnets 6. The large space for upward stretching also allows the stretched arc to be quickly extinguished.

[0052] As shown in FIGS. 1 to 7, in the illustrated embodiment, the insulating base 1 has a lateral direction X, a longitudinal direction Y, and a height direction Z, the partition wall 13 extends along the lateral direction X and the height direction Z, and the two recesses 101 are arranged side by side in the lateral direction X.

[0053] 1 to 7, in the illustrated embodiment, the insulating base 1 further includes two magnet holders 14. The two magnet holders 14 are formed in the arc-extinguishing chamber 10b to hold the two arc-extinguishing magnets 6 of the relay. The two magnet holders 14 face each other in the lateral direction X, and the two recesses 101 are located between the two magnet holders 14.

[0054] 1 to 7, in the illustrated embodiment, the magnet holders 14 are connected to the bottom wall 12 and the partition wall 13, and slots 14a for inserting the arc-extinguishing magnets 6 are formed in each of the two magnet holders 14. The two arc-extinguishing magnets 6 of the relay are configured to be inserted into the slots 14a of the two magnet holders 14, respectively.

[0055] As shown in Figures 1 to 7, in the illustrated embodiment, the slot 14a has an insertion opening located on the outside of the bottom wall 12, and the arc-extinguishing magnet 6 can be inserted into the slot 14a of the magnet holding portion 14 through the insertion opening.

[0056] As shown in FIGS. 1 to 7, in the illustrated embodiment, the inner wall surface of the slot 14a is suitable for tightly fitting the arc-extinguishing magnet 6 to fix the arc-extinguishing magnet 6 to the slot 14a.

[0057] As shown in Figures 1 to 7, in another exemplary embodiment of the present invention, there is a gap between the inner wall surface of the slot 14a and the arc-extinguishing magnet 6, and a sealant 6a is injected into the insertion opening of the slot 14a to seal the insertion opening of the slot 14a and fix the arc-extinguishing magnet 6 to the slot 14a.

[0058] 1 to 7, in the illustrated embodiment, the insulating base 1 further includes two terminal holding portions 15. The two terminal holding portions 15 are formed in the arc-extinguishing chamber 10b to hold two stationary terminals 5 of the relay. The two terminal holding portions 15 are arranged side by side in the lateral direction X and are spaced apart from each other and face the partition wall 13.

[0059] 1 to 7, in the illustrated embodiment, the terminal holders 15 are connected to the peripheral wall 11 and the bottom wall 12, and each of the two terminal holders 15 has a terminal slot 15a for inserting a static terminal 55. The two static terminals 55 of the relay are suitable for insertion into the terminal slots 15a of the two terminal holders 15, respectively.

[0060] As shown in Figures 1 to 7, in the illustrated embodiment, an opening communicating with the terminal slot 15a is formed in the bottom wall 12, and a portion of the stationary terminal 55 can protrude from the insulating base 1 through the opening in the bottom wall 12.

[0061] FIG. 8 is a diagrammatic perspective view of a relay module in accordance with an exemplary embodiment of the present invention. FIG. 9 is a diagrammatic cross-sectional view of a relay module in accordance with an exemplary embodiment of the present invention. FIG. 10 is a diagrammatic exploded view of a relay module in accordance with an exemplary embodiment of the present invention. FIG. 11 is a diagrammatic cross-sectional view of a relay module in accordance with an exemplary embodiment of the present invention. FIG. 12 is a diagrammatic exploded view of a relay armature assembly in accordance with an exemplary embodiment of the present invention. FIG. 13 is a diagrammatic assembly view of a yoke 75 and a return leaf spring 74 of a relay in accordance with an exemplary embodiment of the present invention. FIG. 14 is a diagrammatic perspective view of a return leaf spring 74 of a relay in accordance with an exemplary embodiment of the present invention. FIG. 15 is a diagrammatic cross-sectional view of a return leaf spring 74 of a relay in accordance with an exemplary embodiment of the present invention. Figure 16 is a cross-sectional view of a yoke 75 and a return leaf spring 74 of a relay according to an exemplary embodiment of the present invention. Figure 17 is a cross-sectional view of a yoke 75, a return leaf spring 74, and an insulating base 1 of a relay according to an exemplary embodiment of the present invention.

[0062] As shown in FIGS. 1 to 17, another exemplary embodiment of the present invention discloses a relay, which may be a DC electromagnetic relay. The relay includes a housing 2, an insulating base 1, two stationary contacts 5a, two movable contacts 4a, and two arc-extinguishing magnets 6. The housing 2 has a bottom opening. The insulating base 1 is attached to the bottom opening of the housing 2. The two stationary contacts 5a are located in an arc-extinguishing chamber 10b. The two movable contacts 4a are located in the arc-extinguishing chamber 10b and electrically contact the two stationary contacts 5a, respectively. The two arc-extinguishing magnets 6 are located in the arc-extinguishing chamber 10b and are used to extinguish an electric arc 1c between the stationary contacts 5a and the movable contact 4a by magnetic blow. The two recesses 101 in the bottom wall 12 of the arc-extinguishing chamber 10b are located below the two movable contacts 4a and between the two arc-extinguishing magnets 6. Therefore, the electric arc 1c between one stationary contact 5a and one movable contact 4a of the relay can be pulled downward into the recesses 101 by the magnetic field between the two arc-extinguishing magnets 6. This increases the length of the pulled-down electric arc 1c, thereby quickly extinguishing the electric arc 1c and significantly improving the relay's magnetic extinguishing effect. Additionally, the electric arc between the other stationary contact 5a and the other movable contact 4a of the relay is stretched upward by the magnetic field between the two arc-extinguishing magnets 6. The large space for upward stretching also allows the stretched electric arc to be quickly extinguished.

[0063] As shown in Figures 1 to 17, in the illustrated embodiment, the arc-extinguishing magnet 6 is inserted into the slot 14a of the magnet holding portion 14 of the insulating base 1, and a sealant 6a is injected into the insertion opening of the slot 14a to seal the insertion opening of the slot 14a and hold the arc-extinguishing magnet 6 in the slot 14a.

[0064] 1 to 17, in the illustrated embodiment, the two arc-extinguishing magnets 6 have a rectangular shape and face each other in the lateral direction X of the insulating base 1. The facing surfaces of the two arc-extinguishing magnets 6 have opposite polarities.

[0065] 1 to 17, in the illustrated embodiment, the relay also includes two static terminals 5. The two static terminals 5 are inserted into terminal slots 15a of two terminal holders 15 of the insulating base 1, respectively, and extend from the bottom wall 12 of the insulating base 1. The two static contacts 5a are fixed to the two static terminals 5, respectively, and are electrically connected to the two static terminals 5.

[0066] 1 to 17, in the illustrated embodiment, the relay also includes a movable terminal 4. The movable terminal 4 is located in the arc-extinguishing chamber 10b. Two movable contacts 4a are fixed to both ends of the movable terminal 4, respectively, and are electrically connected to the movable terminal 4. When the two movable contacts 4a move to a closed position where they are in electrical contact with the two stationary contacts 5a, the two stationary terminals 5 are electrically connected to each other via the movable terminal 4.

[0067] As shown in FIGS. 1 to 17 , in the illustrated embodiment, the relay further includes a magnetic core 76, a yoke 75, and an armature assembly. The magnetic core 76 is provided in the accommodating chamber 10a. The yoke 75 is provided in the accommodating chamber 10a and fixed to the magnetic core 76. The armature assembly includes an armature 73, a movable leaf spring 71, and an insulator 72. The armature 73 is movably attached to the yoke 75 and is swingable relative to the yoke 75 between an initial position and an attracted position. The movable leaf spring 71 is connected to the movable terminal 4 and is adapted to apply a resilient contact force to the movable contact 4a. The armature 73 and the movable leaf spring 71 are fixed to the insulator 72 and are electrically insulated from each other by the insulator 72.

[0068] As shown in Figures 1 to 17, in the illustrated embodiment, the insulator 72 is an injection molded part that is formed directly on the armature 73 and the movable leaf spring 71 by an embedded injection molding process, and therefore the armature 73, the movable leaf spring 71, and the insulator 72 are integrated into one part.

[0069] As shown in FIGS. 1 to 17, in the illustrated embodiment, the armature 73 and the movable leaf spring 71 are joined to the upper and lower sides of the insulator 72, respectively, and grooves 72a and / or ribs are formed on the front and rear sides of the insulator 72 to increase the creepage distance between the armature 73 and the movable leaf spring 71.

[0070] 1 to 17, in the illustrated embodiment, the movable leaf spring 71 includes a sheet-like body 710 and a plurality of curved wings 711. The plurality of curved wings 711 are connected to one end of the sheet-like body 710 and are bent perpendicular to the sheet-like body 710. The one end of the sheet-like body 710 and the plurality of curved wings 711 are joined to an insulator 72, thereby increasing the bonding force between the movable leaf spring 71 and the insulator 72.

[0071] 1 to 17 , in the illustrated embodiment, the armature 73 includes a plate-like body 730 and a bending portion 731. The bending portion 731 is connected to one end of the plate-like body 730 and is bent perpendicular to the plate-like body 730. The bending portion 731 is bonded within the insulator 72, and the plate-like body 730 is configured to be movably attached to the yoke 75.

[0072] As shown in FIGS. 1 to 17 , in the illustrated embodiment, the relay further includes a return leaf spring 74. The return leaf spring 74 is fixed to the yoke 75 and is pressed against the armature 73, and is used to return the armature 73 from the attracted position to the initial position. The magnetic core 76 and the return leaf spring 74 are disposed on both sides of the yoke 75, respectively. The magnetic core 76 is used to apply an electromagnetic attractive force to the armature 73, and the return leaf spring 74 is used to apply an elastic returning force to the armature 73.

[0073] As shown in FIGS. 1 to 17 , in the illustrated embodiment, yoke 75 includes a vertical plate 750 and a horizontal plate 751. A notch 753 is formed in the upper end of vertical plate 750. The lower end of horizontal plate 751 is connected to the lower end of vertical plate 750. The lower end of magnetic core 76 is fixed to horizontal plate 751 of yoke 75. A neck portion 73a is formed in plate-like body 730 of armature 73, and neck portion 73a is movably engaged with notch 753 of yoke 75.

[0074] 1 to 17, in the illustrated embodiment, the yoke 75 is fixed in a slot in the insulating base 1 in the lateral direction X and the longitudinal direction Y, and the yoke 75 is fixed in the height direction Z to the bottom wall 12 of the insulating base 1 with an adhesive. The magnetic core 76 is riveted into a rivet hole in a horizontal plate 751 of the yoke 75.

[0075] 1 to 17 , in the illustrated embodiment, the return leaf spring 74 includes a vertical spring piece 740 and a pressing spring piece 741. The vertical spring piece 740 is fixed to a vertical plate 750 of the yoke 75. The upper end of the pressing spring piece 741 is connected to the vertical spring piece 740 and is bent at a predetermined angle relative to the vertical spring piece 740. An attachment opening 73b through which the vertical spring piece 740 can pass is formed at one end of the plate-shaped body 730 of the armature 73. The pressing spring piece 741 is pressed against one side of the attachment opening 73b of the armature 73, and applies an elastic return force to the armature 73.

[0076] 1-17, in the illustrated embodiment, snap slots 75a are formed in the vertical plates 750 of the yoke 75, and resilient buckles 74a are formed in the vertical spring pieces 740 of the return leaf spring 74. The resilient buckles 74a engage with the snap slots 75a to secure the return leaf spring 74 to the yoke 75.

[0077] As shown in Figures 1 to 17, in the illustrated embodiment, a vertical slot 13a is formed on the side of the partition wall 13 of the insulating base 1 facing the vertical plate 750 of the yoke 75, and the vertical spring piece 740 of the return leaf spring 74 is inserted into the vertical slot 13a of the partition wall 13.

[0078] 1 to 17 , in the illustrated embodiment, the return leaf spring 74 further includes a limiting spring piece 742 that is connected to the upper end of the vertical spring piece 740 and is located above the other side of the mounting hole 73 b of the armature 73. The limiting spring piece 742 is used to restrain the neck portion 73 a of the armature 73 in the notch 753 of the yoke 75, thereby preventing the armature 73 from coming off the yoke 75.

[0079] As shown in FIGS. 1 to 17 , in the illustrated embodiment, the relay further includes a coil assembly. The coil assembly includes a coil framework 78, a coil 77, and two coil terminals 77a. The coil framework 78 has a central through-hole. The coil 77 is wound around the coil framework 78. The two coil terminals 77a are fixed to the coil framework 78 and connected to two ends of the coil 77, respectively. The coil terminals 77a extend from the bottom wall 12 of the insulating base 1. A magnetic core 76 is attached to the central through-hole of the coil framework 78, and an upper end of the magnetic core 76 is exposed from the outside of the coil framework 78 so as to attract the armature 73.

[0080] 1 to 17, in the illustrated embodiment, when the coil 77 is energized, the armature 73 is attracted to an attracted position by the electromagnetic attractive force of the magnetic core 76, and the two movable contacts 4a move to a closed position where they are in electrical contact with the two stationary contacts 5a, respectively. When the coil 77 is de-energized, the electromagnetic attractive force applied to the armature 73 disappears, the armature 73 returns to its initial position by the elastic restoring force of the return leaf spring 74, and the two movable contacts 4a move to an open position where they are separated from the two stationary contacts 5a.

[0081] 1 to 17, in the illustrated embodiment, the peripheral wall 11 of the insulating base 1 is inserted into the housing 2 through a bottom opening of the housing 2. A protrusion 1a is formed on the outside of the peripheral wall 11 of the insulating base 1, and a slot hole 2a is formed in the peripheral wall of the housing 2. The protrusion 1a engages with the slot hole 2a to fix the housing 2 to the insulating base 1.

[0082] As shown in Figures 1 to 17, in the illustrated embodiment, a positioning step 1b is formed on the outside of the peripheral wall 11 of the insulating base 1, and the positioning step 1b is pressed against the bottom surface 2b of the housing 2 to position the housing 2 in the height direction Z of the insulating base 1.

[0083] As shown in FIGS. 1 to 17 , another exemplary embodiment of the present invention also discloses a relay armature assembly. The relay armature assembly includes an armature 73, a movable leaf spring 71, and an insulator 72. The armature 73 is adapted to be movably mounted on a yoke 75 of the relay and is swingable relative to the yoke 75 between an initial position and an attracted position. The movable leaf spring 71 is adapted to be connected to a movable contact assembly of the relay and to apply a resilient contact force to the movable contact assembly. The armature 73 and the movable leaf spring 71 are fixed to and electrically insulated from each other by the insulator 72.

[0084] As shown in Figures 1 to 17, in the illustrated embodiment, the insulator 72 is an injection molded part that is formed directly on the armature 73 and the movable leaf spring 71 by an embedded injection molding process, and therefore the armature 73, the movable leaf spring 71, and the insulator 72 are integrated into one part.

[0085] As shown in FIGS. 1 to 17, in the illustrated embodiment, the armature 73 and the movable leaf spring 71 are joined to the upper and lower sides of the insulator 72, respectively, and grooves 72a and / or ribs are formed on the front and rear sides of the insulator 72 to increase the creepage distance between the armature 73 and the movable leaf spring 71.

[0086] 1 to 17, in the illustrated embodiment, the movable leaf spring 71 includes a sheet-like body 710 and a plurality of curved wings 711. The plurality of curved wings 711 are connected to one end of the sheet-like body 710 and are bent perpendicular to the sheet-like body 710. The one end of the sheet-like body 710 and the plurality of curved wings 711 are bonded to an insulator 72, thereby increasing the bonding force between the movable leaf spring 71 and the insulator 72.

[0087] As shown in Figures 1 to 17, in the illustrated embodiment, through holes that engage with the insulator 72 are formed in one end of the sheet-like body 710 and in the curved wing portion 711, respectively, to further increase the bonding force between the movable leaf spring 71 and the insulator 72.

[0088] As shown in Figures 1 to 17, in the illustrated embodiment, a rivet hole 712 suitable for engaging with the rivet post 41 of the movable contact assembly is formed in the other end of the sheet-like body 710 of the movable leaf spring 71, so that the movable contact assembly can be riveted to the other end of the sheet-like body 710 of the movable leaf spring 71.

[0089] 1 to 17 , in the illustrated embodiment, the armature 73 includes a plate-like body 730 and a bending portion 731. The bending portion 731 is connected to one end of the plate-like body 730 and is bent perpendicular to the plate-like body 730. The bending portion 731 is joined within the insulator 72, and the plate-like body 730 is configured to be movably attached to the yoke 75. A through-hole that engages with the insulator 72 is formed in the bending portion 731, further increasing the bonding force between the armature 73 and the insulator 72.

[0090] As shown in FIGS. 1 to 17 , another exemplary embodiment of the present invention also discloses a relay module. The relay module includes a magnetic core 76, a yoke 75, a relay armature assembly, and a return leaf spring 74. The yoke 75 is fixed to an insulating base 1. The lower end of the magnetic core 76 is fixed to the yoke 75. The armature 73 of the relay armature assembly is movably attached to the yoke 75 and can swing between an attracting position in contact with the upper end of the magnetic core 76 and an initial position separated from the upper end of the magnetic core 76. The return leaf spring 74 is fixed to the yoke 75 and is pressed against the armature 73 to return the armature 73 from the attracting position to the initial position. The magnetic core 76 and the return leaf spring 74 are disposed on both sides of the yoke 75. The magnetic core 76 is used to apply an electromagnetic attractive force to the armature 73, and the return leaf spring 74 is used to apply an elastic return force to the armature 73.

[0091] As shown in FIGS. 1 to 17 , in the illustrated embodiment, yoke 75 includes a vertical plate 750 and a horizontal plate 751. A notch 753 is formed in the upper end of vertical plate 750. The lower end of horizontal plate 751 is connected to the lower end of vertical plate 750. The lower end of magnetic core 76 is fixed to horizontal plate 751 of yoke 75. A neck portion 73a is formed in plate-like body 730 of armature 73, and neck portion 73a is movably engaged with notch 753 of yoke 75.

[0092] 1 to 17, in the illustrated embodiment, the yoke 75 is fixed in a slot in the insulating base 1 in the lateral direction X and the longitudinal direction Y, and the yoke 75 is fixed in the height direction Z to the bottom wall 12 of the insulating base 1 with an adhesive. The magnetic core 76 is riveted into a rivet hole in a horizontal plate 751 of the yoke 75.

[0093] 1 to 17 , in the illustrated embodiment, the return leaf spring 74 includes a vertical spring piece 740 and a pressing spring piece 741. The vertical spring piece 740 is fixed to a vertical plate 750 of the yoke 75. The upper end of the pressing spring piece 741 is connected to the vertical spring piece 740 and is bent at a predetermined angle relative to the vertical spring piece 740. An attachment opening 73b through which the vertical spring piece 740 can pass is formed at one end of the plate-shaped body 730 of the armature 73. The pressing spring piece 741 is pressed against one side of the attachment opening 73b of the armature 73, and applies an elastic return force to the armature 73.

[0094] 1-17, in the illustrated embodiment, snap slots 75a are formed in the vertical plates 750 of the yoke 75, and resilient buckles 74a are formed in the vertical spring pieces 740 of the return leaf spring 74. The resilient buckles 74a engage with the snap slots 75a to secure the return leaf spring 74 to the yoke 75.

[0095] 1 to 17 , in the illustrated embodiment, the return leaf spring 74 further includes a limiting spring piece 742 that is connected to the upper end of the vertical spring piece 740 and is located above the other side of the mounting hole 73 b of the armature 73. The limiting spring piece 742 is used to restrain the neck portion 73 a of the armature 73 in the notch 753 of the yoke 75, thereby preventing the armature 73 from coming off the yoke 75.

[0096] As shown in FIGS. 1 to 17 , in the illustrated embodiment, the relay module further includes a coil assembly. The coil assembly includes a coil framework 78, a coil 77, and two coil terminals 77a. The coil framework 78 has a central through-hole. The coil 77 is wound around the coil framework 78. The two coil terminals 77a are fixed to the coil framework 78 and connected to two ends of the coil 77, respectively. A magnetic core 76 is attached to the central through-hole of the coil framework 78, and an upper end of the magnetic core 76 is exposed from the outside of the coil framework 78 so as to attract the armature 73.

[0097] As shown in Figures 1 to 17, a relay is also disclosed in another exemplary embodiment of the present invention. The relay includes a housing 2, a relay module, an insulating base 1, and two stationary contact assemblies. The housing 2 has a bottom opening. The relay module is located in the housing 2. The insulating base 1 is attached to the bottom opening of the housing 2. The two stationary contact assemblies are fixed to the insulating base 1 and electrically contact the movable contact assembly.

[0098] As shown in FIGS. 1 to 17 , in the illustrated embodiment, the movable contact assembly includes a movable terminal 4 and two movable contacts 4a. The movable terminal 4 is fixed to a movable leaf spring 71. The two movable contacts 4a are fixed to both ends of the movable terminal 4, respectively. The stationary contact assembly includes a stationary terminal 5 and a stationary contact 5a. The stationary terminal 5 is fixed to an insulating base 1. The stationary contact 5a is fixed to the stationary terminal 5. The two movable contacts 4a are in electrical contact with the stationary contacts 5a of the two stationary contact assemblies, respectively, and are used to electrically connect the stationary terminals 5 of the two stationary contact assemblies.

[0099] 1 to 17, in the illustrated embodiment, when the armature 73 is attracted to the attracted position, the two movable contacts 4a move to a closed position where they are in electrical contact with the two stationary contacts 5a, respectively. When the armature 73 returns to its initial position, the two movable contacts 4a move to an open position where they are separated from the two stationary contacts 5a.

[0100] 1 to 17, in the illustrated embodiment, the insulating base 1 includes a peripheral wall 11, a bottom wall 12, and a partition wall 13. The bottom wall 12 is connected to the bottom of the peripheral wall 11. The partition wall 13 is connected to the peripheral wall 11 and the bottom wall 12. The partition wall 13 divides the internal space defined by the housing 2 and the insulating base 1 into a containment chamber 10a and an arc-extinguishing chamber 10b. The coil assembly and the yoke 75 are disposed in the containment chamber 10a, and the movable contact assembly and the stationary contact assembly are disposed in the arc-extinguishing chamber 10b.

[0101] 1 to 17, in the illustrated embodiment, the relay further includes two arc-extinguishing magnets 6 disposed in the arc-extinguishing chamber 10b. Two recesses 101 are formed inside the bottom wall 12 of the arc-extinguishing chamber 10b and are located below the two movable contacts 4a and between the two arc-extinguishing magnets 6. This allows the electric arc 1c between one stationary contact 5a and one movable contact 4a of the relay to be pulled down into the recess 101 by the magnetic field between the two arc-extinguishing magnets 6, thereby increasing the length of the pulled-down electric arc 1c.

[0102] 1 to 17, in the illustrated embodiment, the insulating base 1 further includes two magnet holders 14 formed in the arc-extinguishing chamber 10b. Slots 14a are formed in the magnet holders 14, and the two arc-extinguishing magnets 6 are inserted into the slots 14a of the two magnet holders 14, respectively.

[0103] As shown in Figures 1 to 17, in the illustrated embodiment, the slot 14a has an insertion opening located on the outside of the bottom wall 12, and the arc-extinguishing magnet 6 is inserted into the slot 14a of the magnet holder 14 through the insertion opening.

[0104] 1 to 17, in the illustrated embodiment, the insulating base 1 further includes two terminal holders 15 formed in the arc-extinguishing chamber 10b. Terminal slots 15a are formed in the terminal holders 15, and the two stationary terminals 5 are inserted into the terminal slots 15a of the two terminal holders 15, respectively.

[0105] 1 to 17, in the illustrated embodiment, the peripheral wall 11 of the insulating base 1 is inserted into the housing 2 through a bottom opening of the housing 2. A protrusion 1a is formed on the outside of the peripheral wall 11 of the insulating base 1, and a slotted hole 2a is formed in the peripheral wall of the housing 2. The protrusion 1a engages with the slotted hole 2a to secure the housing 2 to the insulating base 1 of the relay.

[0106] As shown in Figures 1 to 17, in the illustrated embodiment, a vertical slot 13a is formed on the side of the partition wall 13 of the insulating base 1 facing the vertical plate 750 of the yoke 75, and the vertical spring piece 740 of the return leaf spring 74 is inserted into the vertical slot 13a of the partition wall 13.

[0107] It should be understood by those skilled in the art that the above embodiments are illustrative and not restrictive. For example, those skilled in the art can make many modifications to the above embodiments without any contradiction in structure or principle, and can freely combine various features described in different embodiments with each other.

[0108] While several exemplary embodiments have been shown and described, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the following claims and their equivalents.

[0109] As used herein, elements described in the singular and preceded by the word "a" or "an" should be understood as not excluding a plurality of said elements or steps, unless such exclusion is expressly stated. Furthermore, references to "one embodiment" of the invention are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the recited features. Furthermore, unless expressly stated otherwise, embodiments "comprising" or "having" an element or elements having a particular characteristic can include additional such elements that do not have that characteristic.

Claims

1. An insulating base (1) for mounting in a bottom opening of a relay housing (2), said insulating base comprising: a peripheral wall (11); a bottom wall (12) connected to the bottom of the peripheral wall (11); a partition wall (13) connected to the peripheral wall (11) and the bottom wall (12); Equipped with The partition wall (13) is used to divide the internal space defined by the housing (2) and the insulating base (1) into a containment chamber (10a) and an arc-extinguishing chamber (10b); An insulating base, wherein two recesses (101) are formed inside the bottom wall (12) of the arc-extinguishing chamber (10b), so that the electric arc (1c) between the stationary contact (5a) and the movable contact (4a) of the relay can be pulled down into the recesses (101) to increase the length of the pulled down electric arc (1c).

2. 2. The insulating base of claim 1, wherein the insulating base (1) has a lateral direction (X), a longitudinal direction (Y), and a height direction (Z), the partition wall (13) extends along the lateral direction (X) and the height direction (Z), and the two recesses (101) are arranged side by side in the lateral direction (X).

3. The relay further includes two magnet holders (14) formed in the arc-extinguishing chamber (10b) for holding two arc-extinguishing magnets (6) of the relay; 3. The insulating base according to claim 2, wherein the two magnet holding portions (14) are opposed to each other in the lateral direction (X), and the two recesses (101) are located between the two magnet holding portions (14).

4. 4. The insulating base according to claim 3, wherein the magnet holding portions (14) are connected to the bottom wall (12) and the partition wall (13), a slot (14a) for inserting the arc-extinguishing magnet (6) is formed in each of the two magnet holding portions (14), and the two arc-extinguishing magnets (6) of the relay are configured to be inserted into the slots (14a) of the two magnet holding portions (14), respectively.

5. 5. The insulating base according to claim 4, wherein the slot (14a) has an insertion opening located on the outside of the bottom wall (12), and the arc-extinguishing magnet (6) can be inserted into the slot (14a) of the magnet holding portion (14) through the insertion opening.

6. 5. The insulating base according to claim 4, wherein the inner wall surface of the slot (14a) is adapted to be press-fitted onto the arc-extinguishing magnet (6) to fix the arc-extinguishing magnet (6) to the slot (14a).

7. 6. The insulating base according to claim 5, wherein there is a gap between the inner wall surface of the slot (14a) and the arc-extinguishing magnet (6), and a sealant (6a) is injected into the insertion opening of the slot (14a) to seal the insertion opening of the slot (14a) and fix the arc-extinguishing magnet (6) to the slot (14a).

8. The relay further includes two terminal holders (15) formed in the arc-extinguishing chamber (10b) for holding two stationary terminals (5) of the relay; 3. The insulating base according to claim 2, wherein the two terminal holding portions (15) are arranged side by side in the lateral direction (X) and are spaced apart from each other and opposite the partition wall (13).

9. 9. The insulating base according to claim 8, wherein the terminal holding portions (15) are connected to the peripheral wall (11) and the bottom wall (12), terminal slots (15a) for inserting the stationary terminals (5) are formed in each of the two terminal holding portions (15), and the two stationary terminals (5) of the relay are configured to be inserted into the terminal slots (15a) of the two terminal holding portions (15), respectively.

10. 10. The insulating base according to claim 9, wherein an opening communicating with the terminal slot (15a) is formed in the bottom wall (12), and a portion of the stationary terminal (5) can protrude from the insulating base (1) through the opening in the bottom wall (12).

11. A relay, a housing (2) having a bottom opening; The insulating base (1) according to any one of claims 1 to 10, which is mounted in the bottom opening of the housing (2); two stationary contacts (5a) located in the arc-extinguishing chamber (10b); two movable contacts (4a) located in the arc-extinguishing chamber (10b) for electrically contacting the two stationary contacts (5a) respectively; two arc-extinguishing magnets (6) located in the arc-extinguishing chamber (10b) for extinguishing the electric arc (1c) between the stationary contact (5a) and the movable contact (4a) by magnetic blow; Equipped with The two recesses (101) in the bottom wall (12) of the arc-extinguishing chamber (10b) are located below the two movable contacts (4a) and between the two arc-extinguishing magnets (6), respectively, so that the electric arc (1c) between the stationary contact (5a) and the movable contact (4a) can be pulled down into the recesses (101) by the magnetic field between the two arc-extinguishing magnets (6).

12. 12. The relay according to claim 11, wherein the arc-extinguishing magnet (6) is inserted into the slot (14a) of the magnet holding portion (14) of the insulating base (1), and a sealant (6a) is injected into the insertion opening of the slot (14a) to seal the insertion opening of the slot (14a) and hold the arc-extinguishing magnet (6) in the slot (14a).

13. 12. The relay according to claim 11, wherein the two arc-extinguishing magnets (6) are rectangular in shape and face each other in the lateral direction (X) of the insulating base (1), and the facing surfaces of the two arc-extinguishing magnets (6) have opposite polarities.

14. The insulating base (1) further includes two stationary terminals (5) inserted into the terminal slots (15a) of the two terminal holding portions (15) of the insulating base (1), respectively, and extending from the bottom wall (12) of the insulating base (1); 12. The relay according to claim 11, wherein the two stationary contacts (5a) are fixed to the two stationary terminals (5) respectively and electrically connected to the two stationary terminals (5).

15. The arc-extinguishing chamber (10b) further includes a movable terminal (4), The two movable contacts (4a) are fixed to both ends of the movable terminal (4) respectively and are electrically connected to the movable terminal (4); 12. The relay according to claim 11, wherein when the two movable contacts (4a) are moved to a closed position in which they are in electrical contact with the two stationary contacts (5a), the two stationary terminals (5) are electrically connected to each other via the movable terminal (4).

16. a yoke (75) provided in the receiving chamber (10a) and fixed to the insulating base (1); a magnetic core (76) mounted in the receiving chamber (10a), the lower end of the magnetic core (76) being fixed to the yoke (75); Armature Assembly and and wherein the armature assembly further comprises: an armature (73) movably mounted on the yoke (75) and swingable relative to the yoke (75) between an initial position and a suction position; a movable leaf spring (71) connected to the movable terminal (4) and configured to apply a resilient contact force to the movable contact (4a); an insulator (72); Including, 16. The relay of claim 15, wherein the armature (73) and the movable leaf spring (71) are fixed to the insulator (72) and are electrically insulated from each other by the insulator (72).

17. 17. The relay of claim 16, wherein the insulator (72) is an injection molded part formed directly on the armature (73) and the movable leaf spring (71) by an embedded injection molding process, so that the armature (73), the movable leaf spring (71), and the insulator (72) are integrated into one part.

18. 17. The relay of claim 16, wherein the armature (73) and the movable leaf spring (71) are bonded to an upper side and a lower side of the insulator (72), respectively, and grooves (72a) and / or ribs are formed on a front side and a rear side of the insulator (72), respectively, to increase a creepage distance between the armature (73) and the movable leaf spring (71).

19. The movable leaf spring (71) A sheet-like body (710), a plurality of curved wing portions (711) connected to one end of the sheet-like body (710) and bent perpendicularly to the sheet-like body (710); Including, 17. The relay of claim 16, wherein one end of the sheet-like body (710) and the plurality of curved wings (711) are bonded within the insulator (72) to increase the bonding force between the movable leaf spring (71) and the insulator (72).

20. The armature (73) A plate-like body (730), A bent portion (731) connected to one end of the plate-like body (730) and bent perpendicularly to the plate-like body (730); Including, 17. The relay of claim 16, wherein the bent portion (731) is bonded within the insulator (72), and the plate-like body (730) is configured to be movably attached to the yoke (75).

21. a return leaf spring (74) fixed to the yoke (75), pressed against the armature (73), and used to return the armature (73) from the attracted position to the initial position; 21. The relay of claim 20, wherein the magnetic core (76) and the return leaf spring (74) are respectively disposed on both sides of the yoke (75), the magnetic core (76) is used to apply an electromagnetic attractive force to the armature (73), and the return leaf spring (74) is used to apply an elastic return force to the armature (73).

22. The yoke (75) a vertical plate (750) having a notch (753) formed at an upper end of the vertical plate (750); A horizontal plate (751) connected to the lower end of the vertical plate (750); Including, 22. The relay of claim 21, wherein a neck portion (73a) is formed on the plate-like body (730) of the armature (73), and the neck portion (73a) is movably engaged with the notch (753) of the yoke (75).

23. The return leaf spring (74) a vertical spring piece (740) fixed to the vertical plate (750) of the yoke (75); A pressure spring piece (741) connected to the upper end of the vertical spring piece (740) and bent at a predetermined angle relative to the vertical spring piece (740); Including, 23. The relay of claim 22, wherein an attachment hole (73b) through which the vertical spring piece (740) can pass is formed at one end of the plate-shaped body (730) of the armature (73), and the pressing spring piece (741) is pressed against one side of the attachment hole (73b) of the armature (73) to apply an elastic restoring force to the armature (73).

24. 24. The relay of claim 23, wherein a snap slot (75a) is formed in the vertical plate (750) of the yoke (75), and a resilient buckle (74a) is formed in the vertical spring piece (740) of the return leaf spring (74), the resilient buckle (74a) engaging with the snap slot (75a) to secure the return leaf spring (74) to the yoke (75).

25. 24. The relay according to claim 23, wherein a vertical slot (13a) is formed on one side of the partition wall (13) of the insulating base (1) opposite to the vertical plate (750) of the yoke (75), and the vertical spring piece (740) of the return leaf spring (74) is inserted into the vertical slot (13a) of the partition wall (13).

26. The return leaf spring (74) further includes a limiting spring piece (742) connected to the upper end of the vertical spring piece (740) and positioned above the other side of the mounting hole (73b) of the armature (73); 24. The relay of claim 23, wherein the limiting spring piece (742) is used to restrain the neck portion (73a) of the armature (73) in the notch (753) of the yoke (75) to prevent the armature (73) from coming off the yoke (75).

27. further comprising a coil assembly, the coil assembly comprising: a coil skeleton (78) having a central through hole; a coil (77) wound around the coil framework (78); Two coil terminals (77a) fixed to the coil framework (78) and connected to both ends of the coil (77), respectively; Including, 22. The relay according to claim 21, wherein the magnetic core (76) is mounted in the central through-hole of the coil skeleton (78), and an upper end of the magnetic core (76) is exposed from the outside of the coil skeleton (78) so as to attract the armature (73).

28. When the coil (77) is energized, the armature (73) is attracted to the attracting position by the electromagnetic attractive force of the magnetic core (76), and the two movable contacts (4 a) move to the closed position where they are in electrical contact with the two stationary contacts (5 a), respectively; 28. The relay according to claim 27, wherein when the current to the coil (77) is stopped, the electromagnetic attractive force applied to the armature (73) disappears, the armature (73) returns to the initial position by the elastic restoring force of the return leaf spring (74), and the two movable contacts (4 a) move to an open position separated from the two stationary contacts (5 a).

29. 12. The relay according to claim 11, wherein the peripheral wall (11) of the insulating base (1) is inserted into the housing (2) through the bottom opening of the housing (2), a protrusion (1 a) is formed on the outer side of the peripheral wall (11) of the insulating base (1), a slot hole (2 a) is formed in the peripheral wall of the housing (2), and the protrusion (1 a) engages with the slot hole (2 a) to fix the housing (2) to the insulating base (1).

30. 12. The relay according to claim 11, wherein a positioning step (1b) is formed on the outer side of the peripheral wall (11) of the insulating base (1), and the positioning step (1b) is pressed against a bottom surface (2b) of the housing (2) to position the housing (2) in the height direction (Z) of the insulating base (1).

Images