Push rod type relay

Abstract

The utility model relates to the technical field of switching devices, in particular to a push rod type relay, which comprises a magnetic circuit part, a movable spring part and a pressure spring, the magnetic circuit part is connected to the movable spring part through a push card to drive the movable spring part to act, the magnetic circuit part comprises a yoke and an armature arranged on the yoke in a swinging manner, and the armature comprises a transmission part connected to the push card. The armature drives the pushing clamp to move by means of swinging of the armature so as to drive the movable spring part to act, the pressure spring comprises a fixing part arranged on one side of the armature, the fixing part is provided with a receding notch, and the receding notch is located on the swinging track of the armature so as to form movement receding of the armature. The receding notch formed in the pressure spring enables the pressure spring not to make contact with the moving armature, the pressure spring is prevented from generating force for promoting the armature to reset, and the retention force is improved after the relay is attracted. Meanwhile, after the pressure spring structure is abdicated, the movement displacement of the armature is larger, and the movement stroke of the push rod is increased, so that a product with a larger contact gap can be met, and the dielectric withstand voltage between the contacts is improved.

Description

Technical Field

[0001] This utility model relates to the field of switching electrical technology, specifically to a push rod type relay. Background Technology

[0002] The structure of the push-rod relay is described in utility model patent CN207925403U, and includes components such as a magnetic circuit, a compression spring, a push lever (also called a "push rod"), a stationary spring, and a moving spring. The magnetic circuit includes a coil, a yoke, and an armature. The armature is oscillatingly mounted on the yoke. See the appendix to the specification of the aforementioned utility model patent CN207925403U. Figure 1 Using the vertical direction as shown, the upper end of the armature is located at the end of the coil and engages or disengages with the iron core inside the coil as the coil is energized or de-energized. The lower end is connected to a push clip to control the movement of the moving spring. When the coil is de-energized, the armature moves away from the iron core, breaking the electrical connection with the iron core. The upper end of the compression spring extends to the side of the armature away from the coil to prevent the armature from moving too far from the iron core. The lower end of the compression spring is located in the middle of the armature. When the coil is energized, causing the armature to engage with the iron core, the armature swings. To ensure full contact between the moving and stationary springs, the armature's travel is relatively long, resulting in slight contact between the armature and the lower end of the compression spring. This creates motion interference between the compression spring and the armature, leading to insufficient holding force after the relay is energized. This is detrimental to the stable and reliable operation of the relay, resulting in poor electrical parameter stability and affecting product production efficiency. Summary of the Invention

[0003] The purpose of this utility model is to provide a push rod type relay, which solves the problem of motion interference between the armature and the spring by setting a clearance notch in the compression spring to accommodate the armature, thereby improving the holding force of the relay after it is energized.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a push rod type relay, comprising a magnetic circuit part, a moving spring part, and a compression spring. The magnetic circuit part is connected to the moving spring part by a push card to drive the moving spring part to move. The magnetic circuit part includes a yoke and an armature oscillating on the yoke. The armature includes a transmission part connected to the push card. The armature drives the push card to move by oscillating, thereby driving the moving spring part to move. The compression spring includes a fixing part disposed on one side of the armature. The fixing part is provided with a clearance notch. The clearance notch is located on the oscillation trajectory of the armature to form a movement clearance of the armature.

[0005] In one embodiment, the magnetic circuit portion further includes a coil and an iron core disposed within the coil. The armature further includes a control portion connected to the upper end of the transmission portion. The control portion is disposed above the iron core and engages / disengages with the iron core as the coil is energized / disengaged. The connection between the control portion and the transmission portion has a corner. The corner is connected to the yoke, causing the armature to swing around the corner. The lower end of the transmission portion is provided with a transmission end connected to the push card. The clearance notch is disposed at the lower end of the compression spring.

[0006] In one embodiment, the armature is a plate-like structure, the extension direction of the transmission part relative to the control part is defined as the length direction of the armature, the direction perpendicular to the length direction on the extension plane of the armature is defined as the width direction, the transmission end is located in the middle of the armature in the width direction of the armature, and the position of the clearance notch corresponds to the transmission end.

[0007] In one embodiment, the device further includes a base, wherein in the width direction of the armature, the recessed portion of the fixing part forms insertion portions on both sides of the base, thereby fixing the fixing part to the base.

[0008] In one embodiment, the insertion portion is an angled structure formed by bending the compression spring.

[0009] In one embodiment, the upper end of the compression spring is provided with a limiting portion extending toward the direction of the armature, and the limiting portion is disposed above the control portion of the armature to form a movement limit for the armature to break off from the iron core.

[0010] In one embodiment, the movable spring portion includes a movable spring sheet and a movable contact disposed on the upper end of the movable spring sheet. The movable spring sheet extends linearly in the vertical direction, and the push clip is fixedly connected to the middle of the movable spring sheet in the vertical direction. It also includes a stationary spring portion, which includes a stationary spring sheet and a stationary contact disposed on the stationary spring sheet. The relative position direction of the movable spring sheet and the stationary spring sheet is defined as the left-right direction. The armature is disposed on the left or right side of the movable spring sheet, and the fixing part is disposed on the side of the armature facing the movable spring portion.

[0011] In one embodiment, there are two stationary reeds, each stationary reed having a stationary contact. A moving reed is disposed between the two stationary reeds, such that the moving contact and one of the stationary contacts form a normally closed contact group, and the moving contact and the other stationary contact form a normally open contact group. A reaction reed is also connected to the lower end of the moving reed, and the reaction reed is disposed on the side of the moving reed away from the normally closed contact group.

[0012] The beneficial effects of this utility model are: the notch in the compression spring prevents the compression spring from contacting the moving armature, thus avoiding the force generated by the compression spring to cause the armature to reset, thereby increasing the holding force after the relay is engaged; at the same time, the armature's displacement is greater after the compression spring structure is recessed, and the stroke of the push rod is increased, which can meet the needs of products with larger contact gaps and improve the dielectric pressure resistance between contacts. Attached Figure Description

[0013] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0014] Figure 2 This is a top view of an embodiment of the present utility model.

[0015] Figure 3 yes Figure 2 AA sectional view.

[0016] Figure 4 This is a connection structure diagram of some parts in an embodiment of this utility model.

[0017] Figure 5 This is a perspective view of the compression spring according to an embodiment of the present invention.

[0018] The components are: 1. Moving spring section, 11. Moving spring plate, 12. Moving contact, 13. Moving spring pin, 14. Reaction spring plate, 2. Stationary spring section, 21. Stationary spring plate, 22. Stationary contact, 23. Stationary spring pin, 3. Push rod, 4. Compression spring, 41. Fixing part, 411. Relief notch, 412. Insertion part, 42. Limiting part, 5. Base, 51. Insertion slot, 6. Coil, 7. Iron core, 8. Yoke, 9. Armature, 90. Corner, 91. Control part, 92. Transmission part, 920. Transmission end. Detailed Implementation

[0019] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0020] See Figures 1 to 5As shown, this utility model discloses a push-rod type relay, including a base 5 and a magnetic circuit part, a moving spring part 1, a stationary spring part 2, a push rod 3, and a compression spring 4 disposed on the base 5. The magnetic circuit part is connected to the moving spring part 1 through the push rod 2 to drive the moving spring part 1 to move. The moving spring part 1 includes a moving spring plate 11, a moving contact 12 disposed on the upper end of the moving spring plate 11, and a moving spring pin 13 connected to the lower end of the moving spring plate 11. The stationary spring part 2 includes two stationary spring plates 21 disposed opposite each other on both sides of the moving spring plate 11. Each stationary spring plate 21 has a stationary contact 22 at its upper end and a stationary spring pin 23 at its lower end. The moving contact 12 forms a normally closed contact group with one of the stationary contacts 22, and forms a normally open contact group with the other stationary contact 22.

[0021] The magnetic circuit includes a coil 6, an iron core 7 disposed within the coil 6, a yoke 8, and an armature 9 oscillatingly disposed on the yoke 8. The armature 9 includes a control section 91 and a transmission section 92. The control section 91 is connected to the upper end of the transmission section 92 and located above the iron core 7. The transmission section 92 is connected to a push rod 3. The connection between the control section 91 and the transmission section 92 has a rotation angle 90. The rotation angle 90 is connected to the yoke 8, causing the armature 9 to oscillate around the rotation angle 90. The control section 91 of the armature 9 engages or disengages with the iron core 7 as the coil 6 is energized / disengaged. The armature 9 then oscillates around the rotation angle 90. This oscillation of the armature 9 drives the push rod 3, which in turn actuates the spring section 1, causing the normally closed contact group to disconnect and the normally open contact group to close.

[0022] The compression spring 4 includes a fixing part 41 disposed on one side of the armature 9. The fixing part 41 has a clearance notch 411, which is located on the swing trajectory of the armature 9 to create a movement clearance for the armature 9. The clearance notch 411 in the compression spring 4 prevents the compression spring 4 from contacting the moving armature 9, avoiding the force generated by the compression spring 4 to cause the armature 9 to reset, thus increasing the holding force after the relay is engaged. At the same time, after the compression spring 9 clears the clearance, the movement displacement of the armature 9 is larger, and the movement stroke of the push rod 3 is increased, which can meet the requirements of products with larger contact gaps and improve the dielectric pressure resistance between contacts. In this embodiment, the control part 91 of the armature 9 is disposed at the upper end of the transmission part 92, and the lower end of the transmission part 92 is provided with a transmission end 920 connected to the push rod 3. Correspondingly, the clearance notch 411 is disposed at the lower end of the compression spring 4. In other embodiments, the armature 9 can also be arranged in reverse, that is, the control part 91 is located at the lower end of the transmission part 92, and the transmission end 920 is located at the upper end of the transmission part 92. Correspondingly, the clearance notch 411 can be located at the upper end of the compression spring 4. Its structure is referenced from the utility model patent CN203503558U.

[0023] The armature 9 is a sheet-like structure. The extension direction of the transmission section 92 relative to the control section 91 is defined as the length direction L of the armature 9. The direction perpendicular to the length direction L on the armature's extension plane is defined as the width direction W. In the width direction W of the armature, the transmission end 920 is located in the middle of the armature 9, and the position of the clearance notch 411 corresponds to the transmission end 920. The transmission end 920 is the part of the armature 9 with the longest swing path. Positioning the clearance notch 411 corresponding to the transmission end 920 helps ensure that the armature 9 is fully clearanced, preventing it from contacting the bottom end of the compression spring 4 and reducing the relay's holding force.

[0024] In the width direction of the armature 9, the clearance notch 411 of the fixing part 41 forms insertion parts 412 on both sides that insert into the base 5. The base 5 is provided with two insertion slots 51 corresponding to the insertion parts 412, thereby fixing the fixing part 41 to the base 5. The clearance notch 411 is set between the two insertion parts 412. On the one hand, it does not affect the fixing of the compression spring 4 and can maintain the stability of the compression spring 4; on the other hand, by using the space between the two insertion slots 51 of the base 5 to arrange the clearance notch 411, the structural modifications to the base 5 and even the relay are reduced, thus reducing costs.

[0025] In this embodiment, the insertion part 412 is an angled structure formed by bending a compression spring, which increases the strength of the insertion part 412 and also serves to mark the installation direction to prevent mistaken identification. In other embodiments, it is also feasible to set the insertion part 412 as a flat plate, that is, the compression spring 4 does not bend to one side but is simply a plate structure.

[0026] The upper end of the compression spring 4 is provided with a limiting part 42 extending toward the direction of the armature 9. The limiting part 42 is located above the control part 91 of the armature 9 to form a movement limit for the armature 9 to break off from the iron core 7. When the coil 6 is energized, the armature 9 and the iron core 7 are attracted to each other, which pushes the moving spring 11 to deform. When the coil 6 is de-energized, the reaction force of the moving spring 11 will cause the push rod 4 and the armature 9 to swing back to their original position. The control part 91 of the armature 9 moves away from the iron core 7. The limiting part 42 of the compression spring 4 prevents the armature 9 from swinging too much and causing the control part 91 to be too far away from the iron core 7, so that the armature 9 can be attracted to the iron core 7 when the coil 6 is energized again.

[0027] In this embodiment, the moving spring 11 extends in a straight line along the vertical direction. The push rod 4 is fixedly connected to the middle of the moving spring 11 in the vertical direction. The relative position direction of the moving spring 11 and the stationary spring 21 is defined as the left-right direction. In this embodiment, the armature 9 is positioned to the left of the moving spring 11. In other embodiments, it can be positioned to the right, by correspondingly changing the positions of other components in the magnetic circuit, such as the coil 6. The fixing part 41 of the compression spring 4 is positioned on the side of the armature 9 facing the moving spring part 1. In the prior art, the moving spring has a bend towards the stationary spring, resulting in a smaller stroke of the moving spring while ensuring a larger distance between the moving spring pin and the stationary spring pin, thus ensuring the electrical clearance between them. In this embodiment, the moving spring part 1 and the stationary spring part 2 form two sets of contacts: a normally closed contact group and a normally open contact group. The moving spring 11 is positioned between the two stationary springs 21. Setting the moving spring 11 to extend in a straight line allows the moving spring 11 to be closer to one of the stationary springs 21, which is beneficial for the reliable closure of the normally closed contact group. The lower end of the moving spring 11 is also connected to a reaction spring 14. The reaction spring 14 is located on the side of the moving spring 11 away from the normally closed contact group, so as to push the moving spring 11 to move towards the normally closed contact group after the coil 6 is de-energized, promote the separation of the normally open contact group, and its rebound force also makes the normally closed contact group more stable.

[0028] The clearance notch 411 in the compression spring 4 provides the armature 9 with greater movement space, increasing the travel of the moving spring 11 to overcome the reaction force of the reaction spring 14. It also compensates for the increased spacing of the normally open contact group due to the linear extension of the moving spring 11 in the vertical direction, ensuring overtravel contact of the normally open contact group. Furthermore, for other types of contact groups, the clearance notch 411 increases the travel of the armature 9, thereby increasing the travel of the push rod 4, which can accommodate products with larger contact gaps and improve the dielectric pressure resistance between contacts.

[0029] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that the remaining undescribed parts are prior art, and that all changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.

Claims

1. A push-rod type relay, comprising a magnetic circuit portion, a moving spring portion, and a compression spring, wherein the magnetic circuit portion is connected to the moving spring portion via a push-lock to drive the moving spring portion to actuate, characterized in that: The magnetic circuit portion includes a yoke and an armature that is oscillatingly disposed on the yoke. The armature includes a transmission part connected to the push card. The armature drives the push card to move by means of its oscillation, thereby driving the moving spring portion to move. The compression spring includes a fixing part disposed on one side of the armature. The fixing part is provided with a clearance notch. The clearance notch is located on the oscillation trajectory of the armature to form a movement clearance of the armature.

2. A push-rod type relay according to claim 1, characterized in that: The magnetic circuit section also includes a coil and an iron core disposed within the coil. The armature also includes a control section connected to the upper end of the transmission section. The control section is disposed above the iron core and engages / disengages with the iron core as the coil is energized / disengaged. The connection between the control section and the transmission section has a corner. The corner is connected to the yoke, causing the armature to swing around the corner. The lower end of the transmission section is provided with a transmission end connected to the push card. The clearance notch is disposed at the lower end of the compression spring.

3. A push-rod type relay according to claim 2, characterized in that: The armature is a plate-like structure. The extension direction of the transmission part relative to the control part is defined as the length direction of the armature. The direction perpendicular to the length direction on the extension plane of the armature is defined as the width direction. In the width direction of the armature, the transmission end is located in the middle of the armature, and the position of the clearance notch corresponds to the transmission end.

4. A push-rod type relay according to claim 3, characterized in that: It also includes a base, wherein in the width direction of the armature, the recessed notch of the fixing part forms an insertion part that inserts into the base, thereby fixing the fixing part to the base.

5. A push-rod type relay according to claim 4, characterized in that: The insertion part is an angled structure formed by bending the compression spring.

6. A push-rod type relay according to claim 2, characterized in that: The upper end of the compression spring is provided with a limiting part extending toward the direction of the armature. The limiting part is disposed above the control part of the armature to form a movement limit for the armature to break off from the iron core.

7. A push-rod type relay according to claim 1, characterized in that: The movable spring portion includes a movable spring sheet and a movable contact disposed on the upper end of the movable spring sheet. The movable spring sheet extends in a straight line along the vertical direction. In the vertical direction, the push clip is fixedly connected to the middle of the movable spring sheet. It also includes a stationary spring portion, which includes a stationary spring sheet and a stationary contact disposed on the stationary spring sheet. The relative position direction of the movable spring sheet and the stationary spring sheet is defined as the left-right direction. The armature is disposed on the left or right side of the movable spring sheet. The fixing part is disposed on the side of the armature facing the movable spring portion.

8. A push-rod type relay according to claim 7, characterized in that: There are two stationary springs, each with a stationary contact. A moving spring is disposed between the two stationary springs, so that the moving contact and one of the stationary contacts form a normally closed contact group, and the moving contact and the other stationary contact form a normally open contact group. A reaction spring is also connected to the lower end of the moving spring, and the reaction spring is disposed on the side of the moving spring away from the normally closed contact group.

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