CN214672419U - Direct-acting DC relay with movable contact spring - Google Patents

Abstract

The utility model discloses a direct-acting direct-current relay with movable reeds, which comprises a movable assembly formed by assembling a push rod, movable reeds and a movable iron core together; the movable assembly further comprises a limiting part and a contact pressure spring, and the movable reed is movably sleeved on the top of the push rod through the limiting part and the contact pressure spring so as to realize overtravel by utilizing the contact pressure spring; the movable iron core is provided with an iron core hole which can be inserted into the push rod; the bottom of catch bar is equipped with the protruding edge that the overall dimension that rotates and form is greater than the iron core hole of moving the iron core to the integrative extension of side, the catch bar from bottom to top cartridge is in moving the iron core hole of iron core, the protruding edge of catch bar and the lower hole edge that moves the iron core hole of iron core correspond and cooperate to can drive the catch bar downstream when realizing moving the iron core downstream. The utility model discloses can avoid the jump ring fracture to appear, the drawback that leads to the product to become invalid appears.

Description

Direct-acting DC relay with movable contact spring

Technical Field

The utility model relates to a direct current relay especially relates to a movable contact spring direct action type direct current relay.

Background

The existing direct current relay adopts a movable spring direct-acting type structure, a contact part of the direct current relay adopts two static contacts and a movable spring, the two static contacts are usually installed at the top of a housing, the bottom ends of the two static contacts extend into the housing, the movable spring is in a direct-acting type and is distributed in the housing, two ends of the movable spring are respectively matched with the two static contacts, when the two ends of the movable spring are contacted with the two static contacts, current flows in from one static contact, and flows out from the other static contact after passing through the movable spring; the movable reed is arranged at one end of the pushing rod component, the other end of the pushing rod component is connected with the movable iron core of the magnetic circuit part, when the coil is connected with current to enable the pushing rod component to move upwards, two ends of the movable reed are respectively contacted with the two static contacts to switch on the load, when the coil is disconnected with the current, the pushing rod component moves downwards under the action of the spring, and two ends of the movable reed are respectively separated from the two static contacts to switch off the load. The dc relay in the prior art mostly adopts a double-snap spring structure, as shown in fig. 1 (fig. 1 is a schematic structural diagram of a movable-spring direct-acting dc relay in the prior art), the upper and lower ends of the push rod 101 are respectively provided with the upper snap spring 102 and the lower snap spring 103, the upper snap spring 102 is mainly used for limiting the movable spring 104, the lower snap spring 103 is used for fixing the movable iron core 105, during assembly, the push rod 101 is loaded into the movable iron core 105 from top to bottom, the movable iron core 105 is supported by the downward step 106 of the push rod 101, the lower snap spring 103 is clamped on the push rod 101 at the bottom surface of the movable iron core 105, the movable iron core 105 is fixed with the push rod 101, and thus, the movable iron core 105 can drive the push rod 101 to move up and down when moving up and down. In the direct-current relay with the structure, on one hand, the movable iron core and the push rod are fixed by using the lower snap spring, and in the releasing process of the relay, the lower snap spring is easy to break due to the action of the reaction force of the spring and the gravity of the push rod assembly, so that the product fails; on the other hand, the movable spring plate and the push rod are limited by the upper clamp spring, and when the movable spring plate is released, the upper clamp spring is broken due to the impact force of the upper clamp spring, so that the product is invalid; the specific embodiment is as follows: after the relay is completely sucked, the distance from the lower surface of the upper clamp spring to the upper surface of the movable spring sheet is the distance of the overtravel, namely, a gap which is the same as the distance of the overtravel in the movable assembly is formed between the lower surface of the upper clamp spring and the upper surface of the movable spring sheet, wherein the movable assembly comprises a push rod 101, an upper clamp spring 102, a lower clamp spring 103, a movable spring sheet 104 and a movable iron core 105 which are assembled together, when the coil is powered off, the sum of the work done by the counter force of two springs (a contact pressure spring and a counter force spring) at the overtravel distance and the work done by the gravity borne by the clamp spring, the sum of the work done by the push rod and the movable iron core at the overtravel distance is converted into the kinetic energy of the push rod and the upper clamp spring sheet, and when the lower surface of the upper clamp spring sheet is contacted with the upper surface of the movable spring sheet, the energy is impacted on the upper clamp spring sheet, and the upper clamp spring sheet is possibly broken.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, and provides a movable reed direct-acting type direct current relay, which can remove the lower snap spring of the prior art through structural improvement, and eliminate the defects that the lower snap spring is broken and the product is invalid due to the action of spring reaction and the gravity of a push rod component in the release process of the relay; on the other hand, the impact force to the upper clamp spring in the releasing process of the relay can be eliminated, and the defect that the upper clamp spring is broken to cause product failure is avoided.

The utility model provides a technical scheme that its technical problem adopted is: a movable reed direct-acting DC relay comprises a movable assembly formed by assembling a push rod, a movable reed and a movable iron core together; the movable assembly further comprises a limiting part and a contact pressure spring, and the movable reed is movably sleeved on the top of the push rod through the limiting part and the contact pressure spring so as to realize overtravel by utilizing the contact pressure spring; the movable iron core is provided with an iron core hole which can be inserted into the push rod; the bottom of catch bar is equipped with the protruding edge that the overall dimension that rotates and form is greater than the iron core hole of moving the iron core to the integrative extension of side, the catch bar from bottom to top cartridge is in moving the iron core hole of iron core, the protruding edge of catch bar and the lower hole edge that moves the iron core hole of iron core correspond and cooperate to can drive catch bar downstream when realizing moving the iron core downstream, and when making the overstroke, move the clearance that the distance with the overstroke size is the same in the subassembly and appear between the bottom of moving the iron core and the upper end of the protruding edge of catch bar.

The limiting component is an upper clamp spring or nut which is fixedly connected to the top end of the push rod and is limited on the movable spring plate; the contact pressure spring is matched on the bottom surface of the movable spring plate.

The movable assembly also comprises a spring seat and a shaft sleeve; the sleeve is sleeved outside the push rod, the lower end of the sleeve abuts against the movable iron core, the upper end of the sleeve abuts against the lower surface of the spring seat, the spring seat is slidably sleeved on the push rod, the lower end of the contact pressure spring abuts against the spring seat, and the upper end of the contact pressure spring abuts against the bottom surface of the movable reed.

The spring seat is provided with a protruding portion for assembling the contact pressure spring, and the protruding portion is arranged upward.

The direct-current relay further comprises a base plate and a guide seat, the base plate and the guide seat are arranged in the middle of the push rod in the length direction, the spring seat is arranged on the base plate and the guide seat, and the movable iron core is arranged below the base plate and the guide seat; the movable component also comprises a counter force spring; the reaction spring is sleeved on the push rod, the upper end of the reaction spring is abutted against the backing plate or the guide seat, and the lower end of the reaction spring is abutted against the movable iron core.

The counter force spring is sleeved outside the shaft sleeve.

The upper end of the movable iron core is also provided with a concave groove, and the lower parts of the reaction spring and the shaft sleeve are respectively accommodated in the groove of the movable iron core.

The movable assembly further comprises an insulating sleeve, the top of the push rod is sleeved with the insulating sleeve, the insulating sleeve comprises a gasket part, and the gasket part of the insulating sleeve is padded between the upper clamp spring or nut and the upper surface of the movable spring plate.

The insulating sleeve further comprises a sleeve portion integrally connected to a bottom end of the spacer portion, the sleeve portion being partitioned between the push rod and the movable spring.

And the protruding part of the spring seat is sleeved outside the sleeve part of the insulating sleeve.

The spring seat is also provided with a poke rod for controlling the micro switch.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses owing to adopted and to be equipped with the contour dimension who rotates the formation to the integrative extension of side in the bottom of catch bar and be greater than the protruding edge in the iron core hole that moves the iron core, catch bar from bottom to top cartridge is in moving the iron core hole of iron core, the protruding edge of catch bar cooperatees with the lower hole edge in the iron core hole that moves the iron core along corresponding to can drive catch bar downstream when realizing moving the iron core downstream, and when making the overstroke, the clearance the same with the distance of overstroke size appears between the bottom of moving the iron core and the upper end on the protruding edge of catch bar in moving the subassembly. The structure of the utility model replaces the lower snap spring of the prior art structure with the convex edge formed by the push rod, thereby eliminating the defect that the lower snap spring is broken and the product is invalid due to the action of the spring reaction force and the gravity of the push rod component in the releasing process of the relay; the utility model discloses because move the subassembly during overtravel with the overtravel size the same clearance of distance appear between the bottom of moving the iron core and the upper end on the protruding edge of catch bar, avoided being used for realizing the impact of the spacing part of movable contact spring in the catch bar upper end, eliminated because of the damage of part leads to the drawback appearance of product inefficacy.

2. The utility model discloses owing to adopted the cooperation of spring holder and axle sleeve to realize moving the whole subassembly upward movement that moves when the iron core upward movement, when having realized the overstroke, move in the subassembly with the overstroke size apart from the same clearance appearance between the bottom of moving the iron core and the upper end on the protruding edge of catch bar. The utility model discloses a structure, in the overstroke stage, spacing part's lower extreme and movable spring upper surface remain the contact throughout, and after the outage, the work of doing in the overstroke distance of the counter-force of two springs (contact pressure spring and counter-force spring promptly), and the work of doing in the overstroke distance of the gravity of moving the subassembly, the effect is on the protruding edge of catch bar, this is because the overstroke distance in the motion of moving the subassembly appears between the upper end on the protruding edge of catch bar and the bottom of moving the iron core, spacing part does not receive the impact force, fracture appears when having avoided spacing part for last jump ring, the drawback that leads to the product inefficacy appears.

3. The utility model discloses because the cooperation of the protruding edge etc. of the bottom of having adopted spring holder, axle sleeve and catch bar realizes moving the assembly of subassembly, and the mutual apical grafting of part, whole assembling process from bottom to top does not have any riveting and welding process, easily realizes automatic assembly.

The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiment of the direct-acting dc relay with movable contact spring.

Drawings

FIG. 1 is a schematic structural diagram of a direct-acting DC relay with a movable contact spring in the prior art

Fig. 2 is an exploded perspective view of a movable assembly (including peripheral engaging members) according to a first embodiment of the present invention;

fig. 3 is a cross-sectional view of the movable assembly according to the first embodiment of the present invention (taken along the middle of the movable spring plate in the length direction);

fig. 4 is a cross-sectional view of the movable assembly according to the first embodiment of the present invention (taken along the middle of the movable spring plate in the width direction);

fig. 5 is a cross-sectional view (cut along the middle in the longitudinal direction of the movable spring) of a first embodiment (contact open state) of the present invention;

fig. 6 is a cross-sectional view (cut along the middle of the length of the movable spring) of a first embodiment (contact is just contacted, and the movable spring does not enter into overtravel) of the present invention;

fig. 7 is a cross-sectional view (taken along the middle of the length of the movable spring plate) of embodiment one (contact, overtravel completed) of the present invention;

fig. 8 is an exploded perspective view of a movable assembly (including peripheral engaging members) according to a second embodiment of the present invention;

fig. 9 is a sectional view of the movable assembly according to the second embodiment of the present invention (which is taken along the middle of the movable spring plate in the longitudinal direction).

Detailed Description

Examples

Referring to fig. 2 to 7, the direct-acting dc relay with movable contact spring of the present invention includes a movable assembly 10 formed by assembling a push rod 1, a movable contact spring 2 and a movable iron core 3; the movable assembly 10 further comprises an upper clamp spring 4 and a contact pressure spring 51, and the movable spring plate 2 is movably sleeved on the top of the push rod 1 through the upper clamp spring 4 and the contact pressure spring 51 so as to realize overtravel by utilizing the contact pressure spring; the upper clamp spring 4 is clamped and fixed at the top end of the push rod 1 through a clamping groove 12 at the top end of the push rod 1 and limited on the movable spring leaf 2, and the contact pressure spring 51 is matched with the bottom surface of the movable spring leaf 2; the movable iron core 3 is provided with an iron core hole 31 into which the push rod can be inserted; the bottom of catch bar 1 is equipped with the protruding edge 11 that the overall dimension that rotates and form is greater than the iron core hole 31 of moving iron core 3 to the integrative extension of side, catch bar 1 from bottom to top cartridge is in moving iron core hole 31 of iron core 3, the protruding edge 11 of catch bar 1 corresponds with the lower hole edge of moving iron core hole 31 of iron core 3 and cooperatees to can drive catch bar 1 downstream when realizing moving iron core 3 downstream, and during making the overstroke, the clearance that is the same with the distance of overstroke size in the subassembly 10 appears between the bottom of moving iron core 3 and the upper end of the protruding edge 11 of catch bar 1. The protruding edge 11 may be a complete circle or may protrude from two opposite sides of the bottom end of the push rod 1.

In this embodiment, the moving assembly 10 further includes a spring seat 61 and a bushing 62; the sleeve 62 is sleeved outside the push rod 1, the lower end of the sleeve 62 abuts against the movable iron core 3, the upper end of the sleeve 62 abuts against the lower surface of the spring seat 61, the spring seat 61 is slidably sleeved on the push rod 1, the lower end of the contact pressure spring 51 abuts against the spring seat 61, and the upper end of the contact pressure spring 51 abuts against the bottom surface of the movable reed 2. In this embodiment, the spring seat 61 and the bushing 62 are separate parts, but of course, the spring seat and the bushing may be integrally formed as a single piece.

In the present embodiment, the spring seat 61 is provided with a protrusion 611 for fitting the contact pressure spring 51, and the protrusion 611 is provided upward.

In this embodiment, the dc relay further includes a backing plate 71 and a guide seat 72, the backing plate 71 is a yoke plate, the guide seat 72 is made of an insulating material, the guide seat 72 is adapted on the backing plate 71, the backing plate 71 and the guide seat 72 are arranged at the middle position of the push rod 1 in the length direction, the spring seat 61 is arranged on the backing plate 71 and the guide seat 72, and the movable iron core 3 is arranged below the backing plate 71 and the guide seat 72; the movable assembly 10 further includes a reaction spring 52; the reaction spring 52 is sleeved on the push rod 1, the upper end of the reaction spring 52 is abutted against the backing plate 71 or the guide seat 72, and the lower end of the reaction spring 52 is abutted against the movable iron core 3.

In this embodiment, the reaction spring 52 is fitted around the outside of the sleeve 62.

In this embodiment, the upper end of the movable iron core 3 is further provided with a groove 32 recessed downward, the lower portions of the reaction spring 52 and the shaft sleeve 62 are respectively accommodated in the groove 32 of the movable iron core 3, and the lower ends of the reaction spring 52 and the shaft sleeve 62 respectively abut against the bottom of the groove 32 of the movable iron core 3.

In this embodiment, the movable assembly 10 further includes an insulating sleeve 8, the insulating sleeve 8 is sleeved on the top of the push rod 1, the insulating sleeve 8 includes a gasket portion 81, and the gasket portion 81 of the insulating sleeve 8 is padded between the upper clamp spring 4 and the upper surface of the movable spring 2.

In this embodiment, the insulating sleeve 8 further includes a sleeve portion 82, the sleeve portion 82 is integrally connected to a bottom end of the spacer portion 81, and the sleeve portion 82 is spaced between the push rod 1 and the movable spring plate 2.

In this embodiment, the protruding portion 611 of the spring seat 61 is fitted outside the sleeve portion 82 of the insulating sleeve 8.

In this embodiment, the spring seat 61 is further provided with a toggle rod 612 for controlling the micro switch.

In this embodiment, the relay further includes a housing 91, a stationary contact 92, and a coil 93; the two fixed contacts 92 are respectively fixed at the top end (i.e. top wall) of the housing 1, and the bottom ends of the fixed contacts 92 extend into the housing 91; the movable reed 2 is arranged below the two static contacts 92, and two ends of the movable reed 2 are respectively matched with the bottom ends of the two static contacts 2; the coil 93 is provided below the back plate 71, and the movable core 3 is fitted in a center hole of the coil 93.

During assembly, the push rod 1 penetrates through the iron core hole 31 of the movable iron core 3 from the bottom end of the movable iron core 3 upwards, the convex edge 11 of the push rod 1 is abutted against the lower hole edge of the iron core hole 31 of the movable iron core 3, then the shaft sleeve 62 and the counter-force pressure spring 52 are sequentially installed on the driven iron core 3, then the backing plate 71 and the guide seat 72 are assembled, then the spring seat 61 is installed, the bottom end of the spring seat 61 is abutted against the top end of the shaft sleeve 62, and then the contact pressure spring 51, the movable reed 2, the insulating sleeve 8, the upper clamp spring 4 and other components are sequentially installed.

Referring to fig. 5 to 7, when the coil 93 is energized, an electromagnetic attraction force is generated on the movable iron core 3, the movable iron core 3 drives the reaction spring 52 and the shaft sleeve 62 to move upward under the action of the electromagnetic attraction force, because the shaft sleeve 62 abuts against the spring seat 61, the spring seat 61 abuts against the contact pressure spring 51, the contact pressure spring 51 abuts against the movable spring piece 2, the movable spring piece 2 abuts against the insulating sleeve 8, and the insulating sleeve 8 abuts against the upper clamp spring 4, so that the upper clamp spring 8 drives the push rod 1 to move upward, and after the contact gap is moved upward, the movable spring piece 2 is contacted with the fixed contact 92; in the overtravel stage, the movable iron core 3 continues to move upwards, the movable reed 2 does not move upwards any more, the movable iron core 3 pushes the shaft sleeve 62 and the spring seat 61 to continue to move upwards by the overtravel distance until the movable iron core 3 is contacted with the backing plate 71, and the poke rod 612 of the spring seat 61 moves upwards to close the microswitch; at the moment, the relay is completely closed. In this process, the contact pressure spring 51 is compressed to ensure contact resistance; the reaction spring 52 is also in a compressed state; the push rod 1 and the upper clamp spring 4 are not stressed in the stage, and cannot move upwards in the stage due to the gravity of the push rod 1, and a gap S is formed between the bottom end of the movable iron core 3 and the upper end of the convex edge 11 of the push rod 1 and is also the overtravel distance of the relay. When the coil 93 is powered off, due to the action of the reaction force of the two springs (i.e. the contact pressure spring 51 and the reaction spring 52) and the self gravity of the movable assembly 10, the movable reed 2 moves downwards to be disconnected from the fixed contact 92, the spring seat 61 moves downwards, and the micro switch is disconnected; meanwhile, the movable iron core 3 is disconnected from the backing plate 71 and returns to the initial position, in the process, the movable iron core 3 firstly moves downwards for an overtravel distance, and after the bottom end of the movable iron core 3 is contacted with the upper end of the convex edge 11 of the push rod 1, the movable iron core 3 drives the push rod 1 to move downwards, so that the whole movable assembly moves downwards for the distance of the contact gap.

The utility model discloses a movable contact spring direct action type direct current relay has adopted and has been equipped with the profile dimension to the integrative protruding edge 11 that extends of side in the bottom of catch bar 1 and be greater than the iron core hole of moving the iron core, catch bar 1 from bottom to top cartridge is in moving the iron core hole 31 of iron core 3, protruding edge 11 of catch bar 1 cooperatees with the lower hole edge of moving the iron core hole 31 of iron core 3 to can drive catch bar 1 downstream when realizing moving iron core 3 downstream, and when making the overtravel, appear between the bottom of moving the iron core and the upper end on the protruding edge of catch bar with the same clearance of the distance of overtravel size in the subassembly. The structure of the utility model utilizes the convex edge 11 formed integrally by the push rod 1 to replace the lower snap spring of the prior art structure, thereby eliminating the defect that the lower snap spring is broken and the product is invalid due to the action of the spring reaction force and the gravity of the push rod component in the releasing process of the relay; the utility model discloses because move the subassembly during overtravel with the overtravel size the same clearance of distance appear between the bottom of moving the iron core and the upper end on the protruding edge of catch bar, avoided being used for realizing the impact of the spacing part of movable contact spring in the catch bar upper end, eliminated because of the damage of part leads to the drawback appearance of product inefficacy.

The utility model discloses a movable contact spring direct action type direct current relay has adopted spring holder 61 and axle sleeve 62's cooperation to realize moving iron core 3 and drive whole when upwards moving subassembly 10 upward movement, when having realized the overstroke, moves in the subassembly and the same clearance of distance of overstroke size appears between the bottom of moving the iron core and the upper end on the protruding edge of catch bar. The utility model discloses a structure, in the overstroke stage, go up the lower extreme of jump ring 4 and the contact is kept all the time with 2 upper surfaces of movable contact spring, and after the outage, the work of doing in the overstroke distance of the counter-force of two springs (contact pressure spring and counter-force spring promptly), with the work of doing in the overstroke distance of the gravity of moving the subassembly, act on protruding edge 11 of catch bar, this is because the overstroke distance in the motion of moving the subassembly appears between the upper end on the protruding edge of catch bar and the bottom of movable iron core, go up jump ring 4 and not receive the impact force, avoided going up the jump ring fracture, the drawback that leads to the product inefficacy appears.

The utility model discloses a movable contact spring direct action type direct current relay has adopted the protruding cooperation such as 11 of following of the bottom of spring holder 61, axle sleeve 62 and catch bar 3 to realize moving the assembly of subassembly, and the mutual top of part connects, and whole assembling process does not have any riveting and welding processes from bottom to top, easily realizes automatic assembly.

Example two

Referring to fig. 8 and 9, the direct-acting dc relay of the movable spring plate of the present invention is different from the first embodiment in that the movable assembly does not use an upper snap spring, but uses a nut 41, and the nut 41 is fixed on the top end of the push rod 1 through the external thread 13 on the top end of the push rod 1 and is limited on the movable spring plate 2.

The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solutions disclosed above can be used by those skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims (11)

1. A movable reed direct-acting DC relay comprises a movable assembly formed by assembling a push rod, a movable reed and a movable iron core together; the movable assembly further comprises a limiting part and a contact pressure spring, and the movable reed is movably sleeved on the top of the push rod through the limiting part and the contact pressure spring so as to realize overtravel by utilizing the contact pressure spring; the movable iron core is provided with an iron core hole which can be inserted into the push rod; the method is characterized in that: the bottom of catch bar is equipped with the protruding edge that the overall dimension that rotates and form is greater than the iron core hole of moving the iron core to the integrative extension of side, the catch bar from bottom to top cartridge is in moving the iron core hole of iron core, the protruding edge of catch bar and the lower hole edge that moves the iron core hole of iron core correspond and cooperate to can drive catch bar downstream when realizing moving the iron core downstream, and when making the overstroke, move the clearance that the distance with the overstroke size is the same in the subassembly and appear between the bottom of moving the iron core and the upper end of the protruding edge of catch bar.

2. The movable reed direct-acting dc relay according to claim 1, wherein: the limiting component is an upper clamp spring or nut which is fixedly connected to the top end of the push rod and is limited on the movable spring plate; the contact pressure spring is matched on the bottom surface of the movable spring plate.

3. The movable reed direct-acting dc relay according to claim 2, wherein: the movable assembly also comprises a spring seat and a shaft sleeve; the sleeve is sleeved outside the push rod, the lower end of the sleeve abuts against the movable iron core, the upper end of the sleeve abuts against the lower surface of the spring seat, the spring seat is slidably sleeved on the push rod, the lower end of the contact pressure spring abuts against the spring seat, and the upper end of the contact pressure spring abuts against the bottom surface of the movable reed.

4. The movable reed direct-acting dc relay according to claim 3, wherein: the spring seat is provided with a protruding portion for assembling the contact pressure spring, and the protruding portion is arranged upward.

5. The movable reed direct-acting dc relay according to claim 3, wherein: the direct-current relay further comprises a base plate and a guide seat, the base plate and the guide seat are arranged in the middle of the push rod in the length direction, the spring seat is arranged on the base plate and the guide seat, and the movable iron core is arranged below the base plate and the guide seat; the movable component also comprises a counter force spring; the reaction spring is sleeved on the push rod, the upper end of the reaction spring is abutted against the backing plate or the guide seat, and the lower end of the reaction spring is abutted against the movable iron core.

6. The movable reed direct-acting dc relay according to claim 5, wherein: the counter force spring is sleeved outside the shaft sleeve.

7. The movable reed direct-acting dc relay according to claim 6, wherein: the upper end of the movable iron core is also provided with a concave groove, and the lower parts of the reaction spring and the shaft sleeve are respectively accommodated in the groove of the movable iron core.

8. The movable reed direct-acting dc relay according to claim 3, wherein: the movable assembly further comprises an insulating sleeve, the top of the push rod is sleeved with the insulating sleeve, the insulating sleeve comprises a gasket part, and the gasket part of the insulating sleeve is padded between the upper clamp spring or nut and the upper surface of the movable spring plate.

9. The movable reed direct-acting dc relay according to claim 8, wherein: the insulating sleeve further comprises a sleeve portion integrally connected to a bottom end of the spacer portion, the sleeve portion being partitioned between the push rod and the movable spring.

10. The movable reed direct-acting dc relay according to claim 9, wherein: and the protruding part of the spring seat is sleeved outside the sleeve part of the insulating sleeve.

11. The movable reed direct-acting dc relay according to claim 10, wherein: the spring seat is also provided with a poke rod for controlling the micro switch.

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