A magnetic latching relay with auxiliary contact group

Abstract

The utility model discloses a magnetic latching relay with an auxiliary contact group, comprising a base, an electromagnetic component, a moving spring and a static spring, etc., an armature component and a push rod, wherein the upper end of the moving spring is fixed in the base, and the lower end is connected to one end of the push rod, and the other end of the push rod is connected to the lower end of the armature component, and when the armature component is driven by the electromagnetic component to swing back and forth, the moving spring can be pulled outwards by the push rod to separate from the static spring or pushed inwards to contact the static spring, thereby cutting off or connecting the load circuit, and the reciprocating swinging turning force of the armature component and the pushing and pulling force of the push rod will be much greater than the spring reaction force between the moving and static contacts, so the welding between the two contacts and the inability to disconnect in time can be avoided, the structural reliability is enhanced, and the safety of use is improved; at the same time, a moving and static auxiliary contact group that cooperates with the moving and static contacts to form synchronous work is arranged outside the base, so that the user can accurately grasp the current working state of the magnetic latching relay and avoid limiting the function and use.

Description

Technical Field

[0001] The utility model relates to a magnetic latching relay, in particular to a magnetic latching relay with an auxiliary contact group. Background Art

[0002] At present, the magnetic latching relay is mainly used as a built-in switch for smart meters. It is an important electrical component that can ensure the safety of electricity use in smart meters. Its structure is usually composed of a base, an electromagnetic component and a moving reed in the base, and a static reed on the base. When working, the moving reed and the static reed can be pushed to form contact or separation through the adsorption or release of the electromagnetic component, thereby connecting or disconnecting the load circuit; however, when the magnetic latching relay switches the DC load, since the current flows from the positive pole to the negative pole, it will cause the current to have no zero crossing phenomenon, which makes it difficult to quickly cut off the arc generated by the current, and the moving reed Usually, the moving and static contacts are designed to be in contact and conduction between the moving and static reeds, which easily causes welding between the two contacts and makes it impossible to disconnect in time. The structural reliability is poor, and it also brings great safety hazards to the use of magnetic latching relays. At the same time, the separation or contact between the existing moving and static reeds is hidden in the base, which makes it impossible for users to grasp the current working status of the magnetic latching relay in time and accurately. In this way, since the separation and connection status between the moving and static reeds cannot be accurately grasped, the functional use of the magnetic latching relay is greatly limited, such as access to indicator light circuits, locking circuits, remote signal circuits and fault judgment circuits. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a magnetic latching relay with an auxiliary contact group which is reliable in structure, safe in use, allows users to accurately grasp the current working state of the magnetic latching relay and avoids limiting functional uses.

[0004] The technical problem of the utility model is achieved through the following technical solutions:

[0005] A magnetic latching relay with an auxiliary contact group comprises a base, an electromagnetic assembly and a moving spring in the base, and a stationary spring on the base, an armature assembly and a push rod are arranged between the electromagnetic assembly and the moving spring, and the armature assembly is installed in the base for reciprocating swing; the upper end of the moving spring is fixed in the base, the lower end of the moving spring is connected to one end of the push rod, and the other end of the push rod is connected to the lower end of the armature assembly; the electromagnetic assembly drives the armature assembly to reciprocate, and the push rod pulls the moving spring outward to separate from the stationary spring to cut off the load circuit, or pushes the moving spring inward to contact the stationary spring to connect the load circuit.

[0006] An auxiliary contact group is arranged outside the base, and the auxiliary contact group includes a static auxiliary piece and a dynamic auxiliary piece; the push rod pulls the dynamic reed piece outward to separate from the static reed piece to cut off the load circuit, and makes the dynamic auxiliary piece synchronously separate from the static auxiliary piece; the push rod pushes the dynamic reed piece inward to contact the static reed piece to connect the load circuit, and makes the dynamic auxiliary piece synchronously contact the static auxiliary piece.

[0007] The armature assembly is provided with a driving rod, which passes through a driving hole on the base and is located between the static auxiliary plate and the dynamic auxiliary plate; the electromagnetic assembly drives the armature assembly to swing back and forth, and drives the dynamic auxiliary plate to synchronously separate from the static auxiliary plate or drive the dynamic auxiliary plate to synchronously contact the static auxiliary plate through the driving rod.

[0008] The lower end of the dynamic auxiliary plate is fixed, and the upper end is extended and suspended to form an elastic end; the driving rod pushes the dynamic auxiliary plate to synchronously separate from the static auxiliary plate, and causes the elastic end of the dynamic auxiliary plate to accumulate elastic potential energy; the driving rod separates from the dynamic auxiliary plate, and the elastic potential energy is released and pushes the dynamic auxiliary plate to elastically and tightly contact the static auxiliary plate.

[0009] The dynamic auxiliary sheet is provided with a dynamic auxiliary contact, and the static auxiliary sheet is provided with a static auxiliary contact; the dynamic auxiliary sheet is in contact with the static auxiliary contact of the static auxiliary sheet via the dynamic auxiliary contact.

[0010] The movable spring is provided with an outer convex portion protruding toward the static spring; the push rod pulls the movable spring outward to separate from the static spring, and causes the lower end of the movable spring to accumulate elastic potential energy through the outer convex portion; the push rod pushes the movable spring inward to contact the static spring, and the elastic potential energy is released and jointly pushes the movable spring to elastically and tightly contact the static spring.

[0011] The movable reed piece is provided with a movable contact, and the stationary reed piece is provided with a stationary contact; the movable reed piece is in contact with the stationary contact of the stationary reed piece via the movable contact.

[0012] A connecting groove is arranged at the lower end of the armature assembly, and the other end of the push rod is movably connected in the connecting groove.

[0013] A curved hook is arranged at the lower end of the movable spring piece, and the lower end of the movable spring piece is hooked in a connecting hole at one end of the push rod through the curved hook.

[0014] The electromagnetic assembly is provided with an upper yoke and a lower yoke, and two upper suction blocks are provided at the upper end of the armature assembly and two lower suction blocks are provided at the lower end, the upper yoke is located between the two upper suction blocks, and the lower yoke is located between the two lower suction blocks; the electromagnetic assembly is energized for positive excitation or reverse excitation, and the upper yoke and the lower yoke form alternating coordination adsorption on the two upper suction blocks and the two lower suction blocks, thereby driving the armature assembly to form reciprocating swing.

[0015] Compared with the prior art, the utility model mainly provides an armature assembly and a push rod between the electromagnetic assembly and the moving spring piece, the armature assembly can be installed in the base and can swing back and forth, and the upper end of the moving spring piece is fixed in the base, the lower end of the moving spring piece is connected to one end of the push rod, and the other end of the push rod is connected to the lower end of the armature assembly; in this way, when the armature assembly is driven by the electromagnetic assembly to swing back and forth, the push rod can pull the moving spring piece outward to separate from the static spring piece and cut off the load circuit, or push the moving spring piece inward to contact the static spring piece and connect the load circuit; obviously, the electromagnetic assembly drives the moving spring piece to separate from or contact the static spring piece through the armature assembly and in cooperation with the push rod. Compared with the traditional electromagnetic assembly directly driving the moving spring piece to move and contact, the reciprocating swinging turning force of the armature assembly and the push-pull force of the push rod will be much greater than the reaction force of the spring piece between the moving and static contacts, so when the magnetic retainer When the holding relay switches the DC load, the arc generated by the current can be easily and quickly forced to be cut off, thereby avoiding the situation where the two contacts are welded and cannot be disconnected in time, enhancing the structural reliability and improving the safety of use; at the same time, a dynamic and static auxiliary contact group that cooperates with the dynamic and static contacts to form a synchronous operation is provided outside the base, that is, the dynamic reed separates from the static reed to cut off the load circuit, and the dynamic auxiliary contact of the dynamic auxiliary piece is synchronously separated from the static auxiliary contact of the static auxiliary piece, the dynamic reed contacts the static reed to connect the load circuit, and the dynamic auxiliary contact of the dynamic auxiliary piece is synchronously in contact with the static auxiliary contact of the static auxiliary piece; therefore, the separation and connection state between the dynamic and static reeds hidden in the base can be timely and accurately grasped by the user, so that the magnetic holding relay can have multiple functional uses, such as access indicator light circuit, locking circuit, remote transmission signal circuit and fault judgment circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model in a normally closed state.

[0017] Figure 2 for Figure 1 Schematic diagram of the back of the base.

[0018] Figure 3 for Figure 1 Schematic diagram of the structure with the base and protective plate removed.

[0019] Figure 4 It is a structural schematic diagram of the utility model in an open state.

[0020] Figure 5 for Figure 4 Schematic diagram of the back of the base.

[0021] Figure 6 for Figure 4 Schematic diagram of the structure with the base and protective plate removed.

[0022] Figure 7 It is a structural schematic diagram of the armature assembly.

[0023] Figure 8 for Figure 7 Left view of .

[0024] Fig. 9 for Figure 7 Stereoscopic diagram. DETAILED DESCRIPTION

[0025] The embodiments of the present invention will be described in detail below according to the above-mentioned drawings.

[0026] like Figure 1 to Figure 9 As shown, 1. base, 11. protective plate, 2. electromagnetic assembly, 21. upper yoke, 22. lower yoke, 3. armature assembly, 31. drive rod, 32. rotating shaft, 33. upper suction block, 34. lower suction block, 35. connecting groove, 4. moving reed, 41. moving contact, 42. outer protrusion, 43. hook, 5. static reed, 51. static contact, 6. push rod, 7. static auxiliary plate, 71. static auxiliary contact, 8. moving auxiliary plate, 81. moving auxiliary contact.

[0027] A magnetic latching relay having an auxiliary contact set, such as Figure 1 , Figure 3 As shown, it is mainly used as a built-in switch for a smart meter and is also an important electrical component that can ensure the safety of electricity use in a smart meter. Its structure includes a base 1, an electromagnetic assembly 2 in the base, an armature assembly 3, a push rod 6 and a moving reed 4, and a static reed 5 on the base.

[0028] The base 1 is box-shaped, and a cover plate (not shown) is disposed thereon which is detachably covered on the base, thereby forming a housing of the magnetic latching relay.

[0029] The electromagnetic assembly 2 is provided with an upper yoke 21 and a lower yoke 22. When the electromagnetic assembly 2 is energized, magnetic attraction can be generated on the upper and lower yokes.

[0030] The armature assembly 3 is arranged on one side of the electromagnetic assembly 2, and Figure 1 , Figure 4 As shown, the armature assembly 3 is covered by the protective plate 11, and is installed in the base 1 through the central rotating shaft 32. The upper end of the armature assembly 3 is provided with two upper suction blocks 33, and the lower end is provided with two lower suction blocks 34. The upper yoke 21 of the electromagnetic assembly 2 is located exactly between the two upper suction blocks 33, and the lower yoke 22 is located exactly between the two lower suction blocks 34.

[0031] In this way, when the electromagnetic component 2 is powered on for positive excitation or reverse excitation, the upper yoke 21 and the lower yoke 22 can form alternating coordinated adsorption for the two upper suction blocks 33 and the two lower suction blocks 34. Specifically, when the electromagnetic component 2 is powered on for positive excitation, the upper yoke 21 adsorbs the upper suction block 33 on the right and the lower yoke 22 adsorbs the lower suction block 34 on the left. When the electromagnetic component 2 is powered on for reverse excitation, the upper yoke 21 adsorbs the upper suction block 33 on the left and the lower yoke 22 adsorbs the lower suction block 34 on the right. The armature component 3 is subjected to the positive and reverse excitations of the electromagnetic component 2 and will swing back and forth around the central rotating shaft 32.

[0032] The upper end of the movable spring piece 4 is fixed in the base 1, and an outer protrusion 42 is provided in the middle of the movable spring piece 4, which protrudes toward the static spring piece. The outer protrusion is adjacent to the fixing position of the upper end of the movable spring piece. The lower end of the movable spring piece 4 is designed with a hook 43 as a suspended end, and the lower end of the movable spring piece 4 is hooked in the connecting hole at one end of the push rod 6 through the hook 43, and the other end of the push rod 6 is movably connected in the connecting groove 35 at the lower end of the armature assembly 3.

[0033] Therefore, when the electromagnetic assembly 2 drives the armature assembly 3 to swing back and forth, the movable spring piece 4 can be pulled outwardly through the push rod 6 to separate from the static spring piece 5 and cut off the load circuit, and the lower end of the movable spring piece 4 can also accumulate elastic potential energy through the outer protrusion 42, or the movable spring piece 4 can be pushed inwardly through the push rod 6 to contact the static spring piece 5 and connect the load circuit, and the elastic potential energy accumulated in the outer protrusion 42 can be released and jointly push the movable spring piece 4 to elastically and tightly contact the static spring piece 5, ensuring that the contact between the two is more reliable.

[0034] The movable reed piece 4 is provided with a movable contact 41 , and the stationary reed piece 5 is provided with a stationary contact 51 , and the movable reed piece 4 is in contact with the stationary contact 51 of the stationary reed piece 5 via the movable contact 41 .

[0035] Obviously, the electromagnetic assembly 2 drives the disengagement or contact of the moving spring 4 and the static spring 5 through the armature assembly 3 and in cooperation with the push rod 6. Compared with the traditional electromagnetic assembly 2 directly driving the moving spring 4 to contact, the reciprocating swinging and flipping force of the armature assembly 3 and the push-pull force of the push rod 6 will be much greater than the spring reaction force between the moving and static contacts. Therefore, when the magnetic latching relay switches the DC load, the arc generated by the current can be easily and quickly forced to be cut off, thereby avoiding the situation where the two contacts are welded and cannot be disconnected in time, enhancing the structural reliability and improving the safety of use.

[0036] At the same time, the base 1 is provided with Figure 2 , Figure 5 The auxiliary contact group shown includes a static auxiliary plate 7 and a dynamic auxiliary plate 8. A drive rod 31 is provided on the armature assembly 3 accordingly. The drive rod is a flat round rod and passes through a drive hole on the base 1 and is located between the static auxiliary plate 7 and the dynamic auxiliary plate 8.

[0037] The electromagnetic assembly 2 drives the armature assembly 3 to swing back and forth, and drives the push rod 6 to pull the movable spring piece 4 outward to separate from the static spring piece 5 to cut off the load circuit, so that the movable auxiliary piece 8 is synchronously separated from the static auxiliary piece 7; or drives the push rod 6 to push the movable spring piece 4 inward to contact the static spring piece 5 to connect the load circuit, so that the movable auxiliary piece 8 is synchronously contacted with the static auxiliary piece 7.

[0038] In addition, the lower end of the dynamic auxiliary plate 8 is fixed, and the upper end is extended and suspended to form an elastic end. Therefore, when the driving rod 31 pushes the dynamic auxiliary plate 8 to synchronously separate from the static auxiliary plate 7, the elastic end of the dynamic auxiliary plate 8 can accumulate elastic potential energy; when the driving rod 31 separates from the dynamic auxiliary plate, the elastic potential energy will be released and push the dynamic auxiliary plate 8 to elastically and tightly contact the static auxiliary plate 7, ensuring that the contact between the two is more reliable.

[0039] The movable auxiliary piece 8 is provided with a movable auxiliary contact 81 , and the static auxiliary piece 7 is provided with a static auxiliary contact 71 , and the movable auxiliary piece 8 is in contact with the static auxiliary contact 71 of the static auxiliary piece 7 via the movable auxiliary contact 81 .

[0040] Therefore, this type of contact group is also provided outside the base 1 with a dynamic and static auxiliary contact group that cooperates with the dynamic and static contacts to form a synchronous operation, that is, the dynamic reed 4 separates from the static reed 5 to cut off the load circuit, and the dynamic auxiliary contact 81 of the dynamic auxiliary piece 8 is synchronously separated from the static auxiliary contact 71 of the static auxiliary piece 7, the dynamic reed 4 contacts the static reed 5 to connect the load circuit, and the dynamic auxiliary contact 81 of the dynamic auxiliary piece 8 is synchronously in contact with the static auxiliary contact 71 of the static auxiliary piece 7. It can enable the user to grasp the separation and connection state between the dynamic and static reeds hidden in the base 1 in a timely and accurate manner, so that the magnetic holding relay has multiple functional uses, such as access indicator light circuit, locking circuit, remote signal circuit and fault judgment circuit.

[0041] The above description is only a specific embodiment of the present invention. Those skilled in the art should understand that any structural design equivalent to this embodiment should be included in the protection scope of the present invention.

Claims

1. A magnetic latching relay with an auxiliary contact group, comprising a base (1), an electromagnetic assembly (2) and a moving reed (4) in the base, and a stationary reed (5) on the base, characterized in that An armature assembly (3) and a push rod (6) are provided between the electromagnetic assembly (2) and the movable spring (4); the armature assembly (3) is installed in the base (1) to swing back and forth; the upper end of the movable spring (4) is fixed in the base (1); the lower end of the movable spring (4) is connected to one end of the push rod (6); the other end of the push rod is connected to the lower end of the armature assembly (3); the electromagnetic assembly (2) drives the armature assembly (3) to swing back and forth, and pulls the movable spring (4) outwards through the push rod (6) to separate from the static spring (5) to cut off the load circuit, or pushes the movable spring (4) inwards through the push rod (6) to contact the static spring (5) to connect the load circuit.

2. A magnetic latching relay with an auxiliary contact group according to claim 1, characterized in that The base (1) is provided with an auxiliary contact group outside, the auxiliary contact group comprising a static auxiliary piece (7) and a dynamic auxiliary piece (8); the push rod (6) pulls the dynamic reed piece (4) outward to separate from the static reed piece (5) to cut off the load circuit, and makes the dynamic auxiliary piece (8) synchronously separate from the static auxiliary piece (7); the push rod (6) pushes the dynamic reed piece (4) inward to contact the static reed piece (5) to connect the load circuit, and makes the dynamic auxiliary piece (8) synchronously contact the static auxiliary piece (7).

3. A magnetic latching relay with an auxiliary contact group according to claim 2, characterized in that The armature assembly (3) is provided with a driving rod (31), which passes through a driving hole on the base (1) and is located between the static auxiliary plate (7) and the dynamic auxiliary plate (8); the electromagnetic assembly (2) drives the armature assembly (3) to swing back and forth, and drives the dynamic auxiliary plate (8) to synchronously separate from the static auxiliary plate (7) or to synchronously contact the static auxiliary plate (7) via the driving rod (31).

4. A magnetic latching relay with an auxiliary contact group according to claim 3, characterized in that The lower end of the dynamic auxiliary plate (8) is fixed, and the upper end is extended and suspended to form an elastic end; the driving rod (31) pushes the dynamic auxiliary plate (8) to synchronously separate from the static auxiliary plate (7), and causes the elastic end of the dynamic auxiliary plate (8) to accumulate elastic potential energy; when the driving rod (31) separates from the dynamic auxiliary plate (8), the elastic potential energy is released and pushes the dynamic auxiliary plate (8) to elastically and tightly contact the static auxiliary plate (7).

5. A magnetic latching relay with an auxiliary contact group according to claim 4, characterized in that The movable auxiliary plate (8) is provided with a movable auxiliary contact (81), and the static auxiliary plate (7) is provided with a static auxiliary contact (71); the movable auxiliary plate (8) is in contact with the static auxiliary contact (71) of the static auxiliary plate (7) via the movable auxiliary contact (81).

6. A magnetic latching relay with an auxiliary contact group according to claim 1, characterized in that The movable reed (4) is provided with an outer protrusion (42) protruding toward the stationary reed; the push rod (6) pulls the movable reed (4) outward to separate from the stationary reed (5), and causes the lower end of the movable reed to accumulate elastic potential energy through the outer protrusion (42); the push rod (6) pushes the movable reed (4) inward to contact the stationary reed (5), and the elastic potential energy is released and jointly pushes the movable reed (4) to elastically and tightly contact the stationary reed (5).

7. A magnetic latching relay with an auxiliary contact group according to claim 6, characterized in that The movable reed (4) is provided with a movable contact (41), and the stationary reed (5) is provided with a stationary contact (51); the movable reed (4) is in contact with the stationary contact (51) of the stationary reed (5) via the movable contact (41).

8. A magnetic latching relay with an auxiliary contact group according to claim 1, characterized in that A connecting groove (35) is provided at the lower end of the armature assembly (3), and the other end of the push rod (6) is movably connected in the connecting groove (35).

9. A magnetic latching relay with an auxiliary contact group according to claim 1, characterized in that A hook (43) is provided at the lower end of the movable spring piece (4), and the lower end of the movable spring piece (4) is hooked into a connecting hole at one end of the push rod (6) via the hook (43).

10. A magnetic latching relay with an auxiliary contact group according to claim 1, characterized in that The electromagnetic assembly (2) is provided with an upper yoke (21) and a lower yoke (22), and two upper suction blocks (33) are provided at the upper end of the armature assembly (3), and two lower suction blocks (34) are provided at the lower end, the upper yoke (21) is located between the two upper suction blocks (33), and the lower yoke (22) is located between the two lower suction blocks (34); the electromagnetic assembly (2) is energized for positive excitation or reverse excitation, and the upper yoke (21) and the lower yoke (22) form alternating coordinated adsorption on the two upper suction blocks (33) and the two lower suction blocks (34), thereby driving the armature assembly (3) to form reciprocating swings.

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