A moving reed direct-acting DC relay

Abstract

The present invention discloses a direct-acting DC relay with a moving reed, which includes a moving component composed of a push rod, a moving reed and a moving iron core assembled together; the moving component further includes a limiting component and a contact pressure spring, and the moving reed is movably sleeved on the top of the push rod through the limiting component and the contact pressure spring to utilize the contact pressure spring to achieve an over-travel; the moving iron core is provided with an iron core hole capable of inserting the push rod; a convex edge formed by integrally extending the bottom end of the push rod to the side and having a contour size larger than the iron core hole of the moving iron core is provided, and the push rod is inserted into the iron core hole of the moving iron core from bottom to top, and the convex edge of the push rod is correspondingly matched with the lower hole edge of the iron core hole of the moving iron core to enable the moving iron core to drive the push rod to move downward when moving downward. The present invention can avoid the drawback that the snap ring breaks and causes the product to fail.

Description

Technical Field

[0001] The present invention relates to a DC relay, and more particularly to a direct-acting moving contact spring type DC relay. Background Art

[0002] An existing DC relay adopts a direct-acting moving contact spring type structure. Its contact part uses two static contacts and a moving contact spring. The two static contacts are usually installed at the top of the housing, and the bottom ends of the two static contacts extend into the housing. The moving contact spring is of the direct-acting type and is distributed within the housing. The two ends of the moving contact spring are respectively matched with the two static contacts. When the two ends of the moving contact spring come into contact with the two static contacts, current flows in from one of the static contacts, passes through the moving contact spring, and then flows out from the other static contact. The moving contact spring is installed at one end of the push rod component, and the other end of the push rod component is connected to the moving iron core of the magnetic circuit part. When current is applied to the coil to move the push rod component upward, the two ends of the moving contact spring come into contact with the two static contacts respectively to connect the load. When the current in the coil is cut off, the push rod component moves downward under the action of the spring, and the two ends of the moving contact spring are separated from the two static contacts respectively to cut off the load. Most of the DC relays of the prior art adopt a double snap spring structure, such as Figure 1 shown in Figure 1(Schematic diagram of the structure of a moving reed direct-acting DC relay in the prior art). A snap ring 102 and a lower snap ring 103 are respectively installed at the upper and lower ends of the push rod 101. The upper snap ring 102 is mainly used to limit the moving reed 104, and the lower snap ring 103 is used to fix the moving iron core 105. During assembly, the push rod 101 is inserted into the moving iron core 105 from top to bottom. The downward step 106 of the push rod 101 abuts against the moving iron core 105, and the lower snap ring 103 is stuck on the push rod 101 at the bottom surface of the moving iron core 105, so that the moving iron core 105 and the push rod 101 are fixed. In this way, when the moving iron core 105 moves up and down, it can drive the push rod 101 to move up and down. For this structure of DC relay, on the one hand, the moving iron core and the push rod are fixed by the lower snap ring. During the release process of the relay, due to the spring reaction force and the self-weight of the push rod assembly, the lower snap ring is prone to breakage, resulting in product failure; on the other hand, the moving reed and the push rod are limited by the upper snap ring. During release, since the upper snap ring will be subjected to an impact force, the upper snap ring will also break, resulting in product failure; the specific phenomenon is: after the relay is fully attracted, there is a distance equal to the over-travel between the lower surface of the upper snap ring and the upper surface of the moving reed, that is, a gap equal to the over-travel appears between the lower surface of the upper snap ring and the upper surface of the moving reed. Among them, the moving assembly includes the push rod 101, the upper snap ring 102, the lower snap ring 103, the moving reed 104 and the moving iron core 105 assembled together. When the coil is powered off, the sum of the work done by the reaction forces of the two springs (contact pressure spring and reaction spring) at the over-travel distance and the work done by the gravity of the snap ring, the push rod and the moving iron core at the over-travel distance is converted into the kinetic energy of the push rod and the upper snap ring. When the lower surface of the upper snap ring contacts the upper surface of the moving reed, the energy impacts on the upper snap ring, and the upper snap ring may break. Summary of the Invention

[0003] The object of the present invention is to overcome the deficiencies of the prior art and provide a moving reed direct-acting DC relay. Through structural improvement, on the one hand, the lower snap ring of the prior art can be removed, eliminating the drawback that during the release process of the relay, due to the spring reaction force and the self-weight of the push rod assembly, the lower snap ring breaks, resulting in product failure; on the other hand, the impact force on the upper snap ring during the release process of the relay can be eliminated, avoiding the drawback that the upper snap ring breaks, resulting in product failure.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: A direct-acting DC relay with a moving reed includes a moving assembly composed of a push rod, a moving reed, and a moving iron core assembled together; the moving assembly further includes a limiting component and a contact pressure spring, the moving reed is movably sleeved on the top of the push rod through the limiting component and the contact pressure spring to utilize the contact pressure spring to achieve an over-travel; the moving iron core is provided with an iron core hole capable of inserting the push rod; a convex edge formed by integrally extending the bottom end of the push rod to the side has a contour size larger than the iron core hole of the moving iron core, the push rod is inserted into the iron core hole of the moving iron core from bottom to top, and the convex edge of the push rod corresponds to and cooperates with the lower hole edge of the iron core hole of the moving iron core to enable the moving iron core to drive the push rod to move downward when the moving iron core moves downward, and when the over-travel occurs, a gap with the same distance as the over-travel size appears between the bottom end of the moving iron core and the upper end of the convex edge of the push rod in the moving assembly.

[0005] The limiting component is an upper snap ring or a nut, the upper snap ring or the nut is connected and fixed to the top end of the push rod and is limited on the upper surface of the moving reed; the contact pressure spring is fitted on the bottom surface of the moving reed.

[0006] The moving assembly further includes a spring seat and a bushing; the bushing is sleeved outside the push rod, the lower end of the bushing abuts against the moving iron core, the upper end of the bushing 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 moving reed.

[0007] The spring seat is provided with a protruding portion for assembling the contact pressure spring, and the protruding portion is arranged upward.

[0008] The DC relay further includes a backing plate and a guide seat, the backing plate and the guide seat are arranged at the middle position in the length direction of the push rod, the spring seat is arranged on the backing plate and the guide seat, the moving iron core is arranged below the backing plate and the guide seat; the moving assembly further includes a reaction spring; the reaction spring is sleeved on the push rod, the upper end of the reaction spring abuts against the backing plate or the guide seat, and the lower end of the reaction spring abuts against the moving iron core.

[0009] The reaction spring is sleeved outside the bushing.

[0010] The upper end of the moving iron core is further provided with a downwardly recessed groove, and the reaction spring and the lower part of the bushing are respectively accommodated in the groove of the moving iron core.

[0011] The moving assembly further includes an insulating sleeve, the insulating sleeve is sleeved on the top of the push rod, the insulating sleeve includes a gasket portion, and the gasket portion of the insulating sleeve is padded between the upper snap ring or the nut and the upper surface of the moving reed.

[0012] The insulating sleeve further includes a sleeve portion integrally connected to the bottom end of the gasket portion, and the sleeve portion is disposed between the push rod and the moving reed.

[0013] The protruding portion of the spring seat is sleeved on the outer side of the sleeve portion of the insulating sleeve.

[0014] The spring seat is further provided with a toggle lever for controlling the microswitch.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. In the present invention, a convex edge formed by rotation is integrally extended from the bottom end of the push rod to the side, and the contour size of the convex edge is larger than the iron core hole of the moving iron core. The push rod is inserted into the iron core hole of the moving iron core from bottom to top, and the convex edge of the push rod is correspondingly matched with the lower hole edge of the iron core hole of the moving iron core, so as to drive the push rod to move downward when the moving iron core moves downward, and when the overtravel occurs, a gap with the same distance as the overtravel size appears between the bottom end of the moving iron core and the upper end of the convex edge of the push rod. This structure of the present invention uses the convex edge integrally formed on the push rod to replace the lower retaining ring in the prior art structure, eliminating the disadvantage that during the release process of the relay, due to the action of the spring reaction force and the self-weight of the push rod assembly, the lower retaining ring breaks, resulting in product failure. In the present invention, since a gap with the same distance as the overtravel size appears between the bottom end of the moving iron core and the upper end of the convex edge of the push rod during overtravel, the impact on the component used to limit the position of the moving reed at the upper end of the push rod is avoided, and the disadvantage of product failure caused by component damage is eliminated.

[0017] 2. In the present invention, the cooperation of the spring seat and the bushing is used to drive the entire moving assembly to move upward when the moving iron core moves upward, and when the overtravel occurs, a gap with the same distance as the overtravel size appears between the bottom end of the moving iron core and the upper end of the convex edge of the push rod. In this structure of the present invention, during the overtravel stage, the lower end of the limiting component always remains in contact with the upper surface of the moving reed. After power-off, the work done by the reaction forces of the two springs (i.e., the contact pressure spring and the reaction spring) within the overtravel distance and the work done by the gravity of the moving assembly within the overtravel distance act on the convex edge of the push rod. This is because the overtravel distance during the movement of the moving assembly appears between the upper end of the convex edge of the push rod and the bottom end of the moving iron core, and the limiting component is not affected by the impact force, avoiding the disadvantage that when the limiting component is an upper retaining ring, it breaks, resulting in product failure.

[0018] 3. In the present invention, the cooperation of the spring seat, the bushing and the convex edge at the bottom end of the push rod is used to realize the assembly of the moving assembly. The parts are in contact with each other, and the entire assembly process is from bottom to top without any riveting and welding processes, which is easy to realize automatic assembly.

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments; however, a moving reed direct-acting DC relay of the present invention is not limited to the embodiments. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a moving reed direct-acting DC relay of the prior art

[0021] Figure 2 is an exploded perspective view of the moving component (including peripheral mating components) of Embodiment 1 of the present invention;

[0022] Figure 3 is a cross-sectional view of the moving component of Embodiment 1 of the present invention (cut in the middle along the length direction of the moving reed);

[0023] Figure 4 is a cross-sectional view of the moving component of Embodiment 1 of the present invention (cut in the middle along the width direction of the moving reed);

[0024] Figure 5 is a cross-sectional view of Embodiment 1 of the present invention (in the state where the contacts are disconnected) (cut in the middle along the length direction of the moving reed);

[0025] Figure 6 is a cross-sectional view of Embodiment 1 of the present invention (when the contacts just touch and have not entered the overtravel) (cut in the middle along the length direction of the moving reed);

[0026] Figure 7 is a cross-sectional view of Embodiment 1 of the present invention (when the contacts are in contact and the overtravel has been completed) (cut in the middle along the length direction of the moving reed);

[0027] Figure 8 is an exploded perspective view of the moving component (including peripheral mating components) of Embodiment 2 of the present invention;

[0028] Figure 9 is a cross-sectional view of the moving component of Embodiment 2 of the present invention (cut in the middle along the length direction of the moving reed). Detailed Embodiment

[0029] Embodiment

[0030] See Figures 2 to 7As shown in the figure, a moving reed direct-acting DC relay of the present invention includes a moving assembly 10 composed of a push rod 1, a moving reed 2, and a moving iron core 3 assembled together; the moving assembly 10 further includes an upper snap ring 4 and a contact pressure spring 51, and the moving reed 2 is movably sleeved on the top of the push rod 1 through the upper snap ring 4 and the contact pressure spring 51 to utilize the contact pressure spring to achieve an over-travel; the upper snap ring 4 is snap-fitted and fixed to the top of the push rod 1 through a card slot 12 at the top end of the push rod 1 and is limited above the moving reed 2, and the contact pressure spring 51 is fitted to the bottom surface of the moving reed 2; the moving iron core 3 is provided with an iron core hole 31 capable of inserting the push rod; a convex edge 11 formed by integrally extending the bottom end of the push rod 1 to the side has a contour size larger than the iron core hole 31 of the moving iron core 3, the push rod 1 is inserted into the iron core hole 31 of the moving iron core 3 from bottom to top, and the convex edge 11 of the push rod 1 is correspondingly matched with the lower hole edge of the iron core hole 31 of the moving iron core 3 to enable the moving iron core 3 to drive the push rod 1 to move downward when the moving iron core 3 moves downward, and when the over-travel occurs, a gap with the same distance as the over-travel size appears between the bottom end of the moving iron core 3 and the upper end of the convex edge 11 of the push rod 1. The convex edge 11 can be a complete circle or a structure protruding from opposite sides at the bottom end of the push rod 1.

[0031] In this embodiment, the moving assembly 10 further includes a spring seat 61 and a bushing 62; the bushing 62 is sleeved outside the push rod 1, the lower end of the bushing 62 abuts against the moving iron core 3, the upper end of the bushing 62 abuts against the bottom 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 moving reed 2. In this embodiment, the spring seat 61 and the bushing 62 are separate parts. Of course, the spring seat and the bushing can also be an integral part made integrally.

[0032] In this embodiment, the spring seat 61 is provided with a protruding portion 611 for assembling the contact pressure spring 51, and the protruding portion 611 is arranged upward.

[0033] In this embodiment, the DC relay further includes a backing plate 71 and a guide seat 72. The backing plate 71 is a yoke iron plate, the guide seat 72 is made of an insulating material, the guide seat 72 is fitted on the backing plate 71, the backing plate 71 and the guide seat 72 are arranged at the middle position in the length direction of the push rod 1, the spring seat 61 is arranged on the backing plate 71 and the guide seat 72, and the moving iron core 3 is arranged below the backing plate 71 and the guide seat 72; the moving assembly 10 further includes a return spring 52; the return spring 52 is sleeved on the push rod 1, the upper end of the return spring 52 abuts against the backing plate 71 or the guide seat 72, and the lower end of the return spring 52 abuts against the moving iron core 3.

[0034] In this embodiment, the reaction spring 52 is sleeved outside the bushing 62.

[0035] In this embodiment, a downwardly recessed groove 32 is further provided at the upper end of the moving iron core 3. The lower parts of the reaction spring 52 and the bushing 62 are respectively received in the groove 32 of the moving iron core 3, and the lower ends of the reaction spring 52 and the bushing 62 respectively abut against the bottom of the groove 32 of the moving iron core 3.

[0036] In this embodiment, the moving 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 snap ring 4 and the upper surface of the moving reed 2.

[0037] In this embodiment, the insulating sleeve 8 further includes a sleeve portion 82. The sleeve portion 82 is integrally connected to the bottom end of the gasket portion 81, and the sleeve portion 82 is interposed between the push rod 1 and the moving reed 2.

[0038] In this embodiment, the protruding portion 611 of the spring seat 61 is sleeved outside the sleeve portion 82 of the insulating sleeve 8.

[0039] In this embodiment, the spring seat 61 is further provided with a toggle lever 612 for controlling the micro switch.

[0040] In this embodiment, the relay further includes a housing 91, a stationary contact 92 and a coil 93; the two stationary contacts 92 are respectively fixed at the top end (i.e., the top wall) of the housing 1 and the bottom end of the stationary contact 92 extends into the housing 91; the moving reed 2 is provided below the two stationary contacts 92, and the two ends of the moving reed 2 are respectively matched with the bottom ends of the two stationary contacts 2; the coil 93 is provided below the backing plate 71, and the moving iron core 3 is fitted in the middle hole of the coil 93.

[0041] During assembly, first pass the push rod 1 upward through the iron core hole 31 of the moving iron core 3 from the bottom end of the moving iron core 3, and make the convex edge 11 of the push rod 1 abut against the lower hole edge of the iron core hole 31 of the moving iron core 3. Then, sequentially install the bushing 62 and the reaction compression spring 52 from the upper surface of the moving iron core 3. Next, assemble the backing plate 71 and the guide seat 72, and then install the spring seat 61, and make the bottom end of the spring seat 61 abut against the top end of the bushing 62. Then, sequentially install components such as the contact pressure spring 51, the moving reed 2, the insulating sleeve 8 and the upper snap ring 4.

[0042] See Figures 5 to 7As shown, when the coil 93 is energized, an electromagnetic attraction force is generated on the moving iron core 3. Under the action of the electromagnetic attraction force, the moving iron core 3 drives the reaction spring 52 and the bushing 62 to move upward. Since the bushing 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 moving reed 2, the moving contact piece 2 abuts against the insulating sleeve 8, and the insulating sleeve 8 abuts against the upper snap ring 4, the upper snap ring 8 drives the push rod 1 to move upward. After moving a distance equal to the contact gap, the moving reed 2 comes into contact with the static contact 92. In the over-travel stage, the moving iron core 3 continues to move upward, and the moving reed 2 no longer moves upward. The moving iron core 3 pushes the bushing 62 and the spring seat 61 to continue moving upward by an over-travel distance until the moving iron core 3 contacts the backing plate 71, and the toggle rod 612 of the spring seat 61 moves upward to close the microswitch. At this time, the relay is fully attracted. During this process, the contact pressure spring 51 is compressed to ensure the contact resistance; the reaction spring 52 is also in a compressed state; the push rod 1 and the upper snap ring 4 are not stressed during this stage and will not move upward due to their own gravity. A gap S appears between the bottom end of the moving iron core 3 and the upper end of the convex edge 11 of the push rod 1, and this gap S is also the over-travel distance of the relay. When the coil 93 is de-energized, due to the reaction forces of the two springs (i.e., the contact pressure spring 51 and the reaction spring 52) and the self-weight of the moving assembly 10, when the moving reed 2 moves downward to disconnect from the static contact 92, the spring seat 61 moves downward and the microswitch disconnects; at the same time, the moving iron core 3 disconnects from the backing plate 71 and returns to the initial position. During this process, the moving iron core 3 first moves downward by the over-travel distance. After the bottom end of the moving iron core 3 contacts the upper end of the convex edge 11 of the push rod 1, the moving iron core 3 drives the push rod 1 to move downward, causing the entire moving assembly to move downward by a distance equal to the contact gap.

[0043] A moving reed direct-acting DC relay of the present invention is provided with a convex edge 11 integrally extending from the bottom end of the push rod 1 to the side, and the contour dimension of the convex edge 11 is larger than the iron core hole of the moving iron core. The push rod 1 is inserted into the iron core hole 31 of the moving iron core 3 from bottom to top, and the convex edge 11 of the push rod 1 is correspondingly matched with the lower hole edge of the iron core hole 31 of the moving iron core 3, so that when the moving iron core 3 moves downward, it can drive the push rod 1 to move downward, and during over-travel, a gap equal to the over-travel distance appears between the bottom end of the moving iron core and the upper end of the convex edge of the push rod in the moving assembly. This structure of the present invention uses the convex edge 11 integrally formed on the push rod 1 to replace the lower snap ring in the prior art structure, eliminating the drawback that during the release process of the relay, due to the reaction force of the spring and the self-weight of the push rod assembly, the lower snap ring breaks, resulting in product failure. In the present invention, since a gap equal to the over-travel distance appears between the bottom end of the moving iron core and the upper end of the convex edge of the push rod in the moving assembly during over-travel, the impact on the component used to limit the moving reed at the upper end of the push rod is avoided, and the drawback of product failure caused by component damage is eliminated.

[0044] A moving reed direct-acting DC relay of the present invention uses the cooperation of a spring seat 61 and a bushing 62 to enable the moving iron core 3 to drive the entire moving assembly 10 upward when moving upward, so that when there is an over-travel, a gap with the same distance as the over-travel size appears between the bottom end of the moving iron core and the upper end of the convex edge of the push rod. In this structure of the present invention, during the over-travel stage, the lower end of the upper retaining spring 4 always remains in contact with the upper surface of the moving reed 2. After power-off, the work done by the reaction forces of the two springs (i.e., the contact pressure spring and the reaction spring) within the over-travel distance and the work done by the gravity of the moving assembly within the over-travel distance act on the convex edge 11 of the push rod. This is because the over-travel distance during the movement of the moving assembly appears between the upper end of the convex edge of the push rod and the bottom end of the moving iron core, and the upper retaining spring 4 is not affected by impact force, avoiding the drawback that the upper retaining spring breaks and causes the product to fail.

[0045] A moving reed direct-acting DC relay of the present invention uses the cooperation of a spring seat 61, a bushing 62, and the convex edge 11 at the bottom end of the push rod 3, etc. to realize the assembly of the moving assembly. The parts are in contact with each other. The entire assembly process is from bottom to top without any riveting and welding processes, and it is easy to realize automated assembly.

[0046] Embodiment 2

[0047] See Figure 8 、 Figure 9 As shown, a moving reed direct-acting DC relay of the present invention is different from that in Embodiment 1 in that the moving assembly does not use an upper retaining spring but uses a nut 41. The nut 41 is connected and fixed to the top end of the push rod 1 through the external thread 13 at the top end of the push rod 1 and is limited above the moving reed 2.

[0048] The above are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the above-disclosed technical content, or modify it into an equivalent equivalent embodiment. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A moving reed direct-acting DC relay, comprising a moving assembly composed of a push rod, a moving reed and a moving iron core assembled together; the moving assembly further includes a limiting member and a contact pressure spring, the moving reed is movably sleeved on the top of the push rod through the limiting member and the contact pressure spring to realize an over-travel by using the contact pressure spring; the moving iron core is provided with an iron core hole capable of inserting the push rod; characterized in that: The bottom end of the push rod integrally extends laterally with a convex edge formed by rotation, and the contour dimension of the convex edge is larger than the iron core hole of the moving iron core. The push rod is inserted into the iron core hole of the moving iron core from bottom to top. The convex edge of the push rod is correspondingly matched with the lower hole edge of the iron core hole of the moving iron core, so that when the moving iron core moves downward, it can drive the push rod to move downward, and when there is an over-travel, a gap with the same distance as the over-travel size appears between the bottom end of the moving iron core and the upper end of the convex edge of the push rod in the moving assembly.

2. The moving reed direct-acting DC relay according to claim 1, characterized in that: The limiting component is an upper snap ring or a nut. The upper snap ring or the nut is connected and fixed to the top end of the push rod and is limited on the upper surface of the moving reed; the contact pressure spring is fitted on the bottom surface of the moving reed.

3. The moving reed direct-acting DC relay according to claim 2, characterized in that: The moving assembly further includes a spring seat and a bushing; the bushing is sleeved outside the push rod, the lower end of the bushing abuts against the moving iron core, the upper end of the bushing 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 moving reed.

4. The moving 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 moving reed direct-acting DC relay according to claim 3, characterized in that: The DC relay further includes a backing plate and a guide seat. The backing plate and the guide seat are arranged at the middle position in the length direction of the push rod. The spring seat is arranged on the upper surfaces of the backing plate and the guide seat, and the moving iron core is arranged below the backing plate and the guide seat; the moving assembly further includes a reaction spring; the reaction spring is sleeved on the push rod, the upper end of the reaction spring abuts against the backing plate or the guide seat, and the lower end of the reaction spring abuts against the moving iron core.

6. The moving reed direct-acting DC relay according to claim 5, wherein: The reaction spring is sleeved outside the bushing.

7. The moving reed direct-acting DC relay according to claim 6, characterized in that: The upper end of the moving iron core is further provided with a downwardly recessed groove, and the reaction spring and the lower part of the bushing are respectively accommodated in the groove of the moving iron core.

8. The moving reed direct-acting DC relay according to claim 3, characterized in that: The moving assembly further includes an insulating sleeve. The insulating sleeve is sleeved on the top of the push rod. The insulating sleeve includes a gasket portion, and the gasket portion of the insulating sleeve is padded between the upper snap ring or the nut and the upper surface of the moving reed.

9. The moving reed direct-acting DC relay according to claim 8, characterized in that: The insulating sleeve further includes a sleeve portion. The sleeve portion is integrally connected to the bottom end of the gasket portion, and the sleeve portion is spaced between the push rod and the moving reed.

10. The moving reed direct-acting DC relay according to claim 9, characterized in that: The protruding portion of the spring seat is sleeved outside the sleeve portion of the insulating sleeve.

11. The moving reed direct-acting DC relay according to claim 10, characterized in that: The spring seat is further provided with a toggle lever for controlling the micro switch.

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