CN210722897U

CN210722897U - Electromagnetic relay for preventing dynamic spring from rebounding

Info

Publication number: CN210722897U
Application number: CN201922005819.8U
Authority: CN
Inventors: 邓洋
Original assignee: Zhangzhou Hongfa Electron Wave Music Co ltd
Current assignee: Zhangzhou Hongfa Electron Wave Music Co ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-06-09
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses an electromagnetic relay for preventing the rebound of a movable spring, which comprises a base, a magnetic circuit system and a contact system, wherein the magnetic circuit system and the contact system are arranged on the base; the movable spring resetting device is characterized by further comprising a limiting structure, wherein the limiting structure and the static spring are located on two opposite sides of the movable spring, and the limiting structure supports the movable spring in the resetting process of the movable spring. The utility model discloses swing range is too big and takes place to kick-back when can preventing to move the spring and reset to produce the risk of secondary switch-on after avoiding the contact disconnection.

Description

Electromagnetic relay for preventing dynamic spring from rebounding

Technical Field

The utility model relates to an electromagnetic relay especially relates to an electromagnetic relay who prevents movable spring resilience.

Background

An electromagnetic relay is used as a low-voltage electrical appliance element and is widely applied to various industries all the time, and the working principle of the electromagnetic relay is to convert electric energy into magnetic energy and then into mechanical energy, and to connect and disconnect a controlled circuit by utilizing the mechanical energy so as to realize the relay function.

In the traditional relay design, the contact system comprises a movable spring provided with a movable contact and a static spring provided with a static contact, when an armature of a magnetic circuit system is attracted by an iron core, the armature drives a pushing clamp to act, the pushing clamp pushes the movable spring to act, the movable contact is in contact with the static contact, and the contact is closed. When the attraction force on the armature disappears, the movable spring resets by means of self-counterforce (namely elastic restoring force) to make the movable contact leave the fixed contact, so that the contact is disconnected. When the contact is disconnected, because the movable spring counter force is great for the amplitude of movable spring to the swing of direction that resets is great, causes the movable spring to kick-back easily, thereby causes the risk of secondary switch-on contact.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a to the technical problem that prior art exists, provide an electromagnetic relay who prevents movable spring resilience.

The utility model provides a technical scheme that its technical problem adopted is: an electromagnetic relay for preventing a movable spring from rebounding comprises a base, a magnetic circuit system and a contact system, wherein the magnetic circuit system and the contact system are arranged on the base; the movable spring resetting device is characterized by further comprising a limiting structure, wherein the limiting structure and the static spring are located on two opposite sides of the movable spring, and the limiting structure supports the movable spring in the resetting process of the movable spring.

Furthermore, the limiting structure is a limiting convex arm.

Furthermore, the movable spring is connected with or integrally formed with a movable spring leading-out sheet, and the limiting convex arm is arranged on the movable spring leading-out sheet.

Furthermore, the limiting convex arm and the movable spring leading-out piece are integrally formed, and the limiting convex arm is in an inclined state.

Furthermore, the limit structure is back to back with the contact point of the movable spring and the movable contact.

Furthermore, the movable spring is connected with the armature of the magnetic circuit system through a pushing clamp.

Furthermore, one end of the pushing clamp comprises two first connecting arms which are arranged side by side, the bottom surfaces of the two first connecting arms are respectively provided with a U-shaped clamping groove with a downward opening, and the U-shaped clamping grooves of the two first connecting arms respectively clamp the left end and the right end of the top of the movable spring.

Furthermore, the other end of the pushing card comprises two second connecting arms which are arranged side by side and a limiting arm which is positioned between the two second connecting arms, the tail ends of the two second connecting arms are respectively provided with a limiting flange, the tops of the left side wall and the right side wall of the armature are respectively provided with a limiting notch, the two second connecting arms respectively penetrate through the two limiting notches of the armature one by one, the limiting flanges are matched on the outer side of the armature, and the limiting arms are matched on the inner side of the armature.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the limiting structure can support the movable spring in the reset process of the movable spring, and prevents the movable spring from rebounding due to overlarge swing amplitude when the movable spring is reset, so that the risk of secondary connection after the contact is disconnected is avoided. Particularly, limit structure and movable spring direct coordination make limit structure more swift to the limiting displacement of movable spring, and the effect is better.

2. The limiting structure preferably selects the limiting convex arm, and the structure is very simple.

3. The limiting convex arm is arranged on the movable spring leading-out piece, so that the problem that the limiting convex arm needs to be additionally installed is solved, and the problem that the limiting convex arm is easy to lose as a single part is solved.

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, and the electromagnetic relay for preventing the movable spring from rebounding.

Drawings

FIG. 1 is an exploded schematic view of the present invention;

FIG. 2 is a schematic perspective view of the present invention (without the housing);

FIG. 3 is a first schematic view of the structure of the present invention, in which the limit protruding arm is engaged with the movable spring and the movable spring lead-out piece;

FIG. 4 is a schematic view of the structure of the present invention showing the engagement of the position-limiting protruding arm with the movable spring and the movable spring lead-out piece;

FIG. 5 is a schematic structural view of an auxiliary spring plate according to the present invention;

FIG. 6 is a schematic diagram of the construction of the push card of the present invention;

FIG. 7 is a schematic view of the installation position of the auxiliary spring of the present invention;

fig. 8 is a schematic structural view of a bobbin of the present invention;

fig. 9 is a first schematic structural view of the armature of the present invention;

FIG. 10 is a second structural schematic of the armature of the present invention;

FIG. 11 is a schematic structural view of a base of the present invention;

fig. 12 is a first assembly schematic view of the armature of the present invention;

fig. 13 is a second assembly schematic of the armature of the present invention.

Detailed Description

In an embodiment, please refer to fig. 1 to 13, the electromagnetic relay for preventing the springback of the movable spring of the present invention includes a base 6, a pushing clip 10, a housing 20, and a magnetic circuit system and a contact system disposed on the base 6, wherein the magnetic circuit system includes a coil frame 3 wound with an enameled wire 4, an iron core 2, a yoke 5, and an armature 1, the iron core 2 penetrates through the coil frame 3, and one end of the iron core 2 is connected to one end of the yoke 5; the armature 1 is swingably standing at the other end of the core 2. The "standing" refers to a state that the armature 1 is not lying in a released state, and may be a vertical standing state or a state that the armature is inclined at a certain angle and approaches to the standing state. The contact system comprises a movable spring 7 provided with a movable contact 71, a stationary spring 8 provided with a stationary contact 81. One end of the pushing card 10 is connected with the movable spring 7, and the other end of the pushing card 10 is connected with the armature 1. The utility model discloses still include limit structure, this limit structure with quiet spring 8 is located the both sides that movable spring 7 is relative, and this limit structure is in movable spring 7 resets the in-process and props movable spring 7. The limiting structure is specifically a limiting convex arm 721, and a contact point of the limiting convex arm 721 and the movable spring 7 is back to back with the movable contact 71.

In this embodiment, a movable spring lead-out piece 72 is connected to the movable spring 7, and the stopper protruding arm 721 is provided on the movable spring lead-out piece 72, as shown in fig. 3 and 4. Specifically, the limit protruding arm 721 and the movable spring leading-out piece 72 are integrally formed, and the limit protruding arm 721 is in an inclined state. That is, the limit protruding arm 721 is formed by cutting a part of the structure of the movable spring lead-out piece 72 and bending it downward. The movable spring leading-out piece 72 is specifically a QC leading-out piece, namely a quick connection leading-out piece, the static spring 8 is also integrally formed with a static spring leading-out piece 82, and the static spring leading-out piece 82 is also a QC leading-out piece.

In this embodiment, the utility model discloses still include supplementary shell fragment 9, this supplementary shell fragment 9 set up in base 1 or static spring 7 are in the moving contact 71 and the contact state of stationary contact 81, and promotion card 10 one end is supported and is pressed in this supplementary shell fragment 9. The bottom end of the housing 20 is open, and the housing 20 encloses the contact system, the magnetic circuit system, the base 6, etc.

In the present embodiment, as shown in fig. 7, the auxiliary resilient piece 9 is riveted to the stationary spring 8, and the riveting point of the auxiliary resilient piece 9 coincides with the riveting point of the stationary contact, that is, when the stationary contact 81 is riveted to the stationary spring 8, the auxiliary resilient piece 9 is riveted to the stationary spring 8 together with the stationary contact 81. In other embodiments, the auxiliary spring is arranged on the base. In the contact state of the movable contact 71 and the fixed contact 81, one end of the push card 10 is pressed against the auxiliary spring 9. The auxiliary spring plate 9 is provided with a limiting piece 92, and the limiting piece 92 is matched with the other end of the push card 10 to limit the push card 10 from being separated upwards.

In this embodiment, as shown in fig. 6, one end of the pushing card 10 includes two parallel first connecting arms 101, the two first connecting arms 101 are respectively connected to the movable spring 7, and in a state that the movable contact 71 is in contact with the stationary contact 81, tail ends of the two first connecting arms 101 respectively abut against the auxiliary resilient piece 9. Specifically, U-shaped slots 1011 with downward openings are respectively formed in the bottom surfaces of the two first connecting arms 101, and the U-shaped slots 1011 of the two first connecting arms respectively clamp the left and right ends of the top of the movable spring 7. As shown in fig. 3, the auxiliary spring 9 has left and right wings 91, the two wings 91 are respectively located on the left and right sides of the stationary spring 8, and in the state that the movable contact 71 is in contact with the stationary contact 81, the tail end surfaces 1012 of the two first connecting arms 101 are respectively pressed against the two wings 91 one by one. The number of the limiting pieces 92 is two, the two limiting pieces 92 are respectively disposed at the top ends of the two fins 91, and the two limiting pieces 92 are respectively fitted on the tail ends of the two first connecting arms 101 of the push card 10 one by one, as shown in fig. 5. Specifically, the two position-limiting pieces 92 are respectively formed by bending the tops of the two wings 91 of the auxiliary elastic sheet 9 toward one side of the pushing card 10. The other end of the pushing card 10 comprises two second connecting arms 102 which are parallel to each other and a plurality of limiting arms 103 which are located between the two connecting arms 102, the tail ends of the two second connecting arms 102 are respectively provided with a limiting flange 1021, the tops of the left side wall and the right side wall of the armature 1 are respectively provided with a limiting notch 14, the two second connecting arms 102 respectively penetrate through the two limiting notches 14 of the armature one by one, the limiting flanges 1021 are matched on the outer side of the armature 1, and the limiting arms 1 are matched on the inner side of the armature 1.

In the embodiment, the armature 1 and the coil former 3 are matched with a first limit structure to limit the armature 1 to move outwards along the axial direction of the coil former 3; the other end of the armature 1 and the yoke 5 are matched with a second limiting structure to limit the armature 1 to move upwards; the armature 1 and the base 6 are matched with a third limiting structure to limit the armature 1 to move downwards; one end of the pushing card 10 is connected with the moving spring 7, the other end is connected with the armature 1, and the pushing card 10 can drive the armature 1 to reset under the action of the counter force of the moving spring 7.

In this embodiment, as shown in fig. 8, one end of the coil frame 3 is provided with two extending blocks 31 located at the left and right sides of the armature 1, the first limiting structure includes two limiting bosses 311 respectively disposed at the opposite inner sides of the two extending blocks 31, and two abdicating notches 11 respectively disposed at the bottoms of the left and right sides of the armature 1, as shown in fig. 9, after each limiting boss 311 respectively passes through the abdicating notch 11 at the corresponding side, the armature 1 is limited by staggering in the height direction with the abdicating notch 11. The second limiting structure comprises a limiting lug 12 arranged at the bottom end of the armature 1 towards one side of the yoke 5, and the limiting lug 12 is leaned against the lower surface of the other end of the yoke 5. The third limiting structure comprises a supporting boss 61 (shown in fig. 11) arranged on the base 6, and a matching surface 13 (shown in fig. 10) arranged at the bottom of the armature 1, wherein the matching surface 13 is abutted against the supporting boss 61, as shown in fig. 13. The number of the support bosses 61 is two, the two support bosses 61 are distributed in parallel along the width direction of the base 6, and the two matching surfaces 13 correspond to the two support bosses 61 one by one. The top surface of the support boss 61 is provided with a guide slope 611, and the mating surface 13 is abutted against the guide slope 611. The mating surface 13 is a flat surface. The limiting convex block 12 is located between the opposite inner sides of the two matching surfaces 13, and the limiting convex block 12 is lower than the two matching surfaces 13.

When assembling the armature 1, in order to facilitate the assembly, the coil part composed of the iron core 2, the coil frame 3 and the yoke 5 and the armature 1 are all inverted, as shown in fig. 12, and then after aligning the two abdicating notches 11 of the armature 1 with the two limiting bosses 311 on the coil frame 3, the armature 1 is pushed into the two extending blocks 31 of the coil frame 3 along the direction a, so that the two limiting bosses 311 respectively pass through the two abdicating notches 11; then, the armature 1 is pulled along the direction b, so that the limit bump 12 on the armature 1 is hung at the other end of the yoke 5, and finally, the magnetic circuit system composed of the armature 1, the coil rack 3, the yoke 5 and the iron core 2 is installed in the base 6, so that the two matching surfaces 13 at the bottom of the armature 1 respectively lean against the guide inclined surfaces 611 of the two support bosses 61 of the base 6, as shown in fig. 13. So, accomplished armature 1's assembly process promptly, at this moment, even do not have the pressure spring or recover the reed and protect, armature 1 can not deviate from yet to realized the design that magnetic circuit does not have the pressure spring structure, therefore can save the pressure spring or recover the assembly process of reed, reached the effect of practicing thrift the cost, improving the whole price/performance ratio of relay.

The utility model discloses a prevent electromagnetic relay that movable spring kick-backed, the during operation, when armature 1 is attracted by iron core 2 and when swinging towards one side at iron core 2 place, armature 1 orders about movable spring 7 through pushing away card 10 and moves to make movable contact 71 of movable spring 7 and stationary contact 81 of stationary spring 8 closed, simultaneously, the tail end face 1012 of two first connecting arms 101 of pushing away card 10 supports respectively and presses in two fins 91 of supplementary shell fragment 9, makes supplementary shell fragment 9 energy storage. When the suction force of the iron core 2 to the armature 1 disappears, the auxiliary elastic sheet 9 releases energy, and the counter-force of the auxiliary elastic sheet 9 is superposed with the counter-force of the movable spring 7, so that the movable spring 7 is rapidly reset, the breaking capacity of the contacts is improved, and the adhesion between the contacts is avoided. In the process, the pushing card 10 pushes the armature 1 to reset rapidly under the action of the counter force of the auxiliary elastic sheet 9 and the counter force of the movable spring 7. When the movable spring 7 moves a certain distance along the reset direction, the movable spring 7 is supported by the limit convex arm 721, so that the phenomenon that the movable spring 7 rebounds due to too large swing amplitude is prevented, and the risk of secondary connection generated when the contact is disconnected is avoided.

The above-mentioned embodiment is only used for further explaining the utility model discloses an electromagnetic relay for preventing movable spring kick-back, nevertheless the utility model discloses do not confine the embodiment to, all be according to the utility model discloses a technical entity is to any simple modification, the equivalent change and the decoration of above embodiment do, all fall into the utility model discloses technical scheme's protection within range.

Claims

1. An electromagnetic relay for preventing a movable spring from rebounding comprises a base, a magnetic circuit system and a contact system, wherein the magnetic circuit system and the contact system are arranged on the base; the method is characterized in that: the movable spring resetting device is characterized by further comprising a limiting structure, wherein the limiting structure and the static spring are located on two opposite sides of the movable spring, and the limiting structure supports the movable spring in the resetting process of the movable spring.

2. The electromagnetic relay according to claim 1, characterized in that: the limiting structure is a limiting convex arm.

3. The electromagnetic relay according to claim 2, wherein: the movable spring is connected with or integrally formed with a movable spring leading-out sheet, and the limiting convex arm is arranged on the movable spring leading-out sheet.

4. The electromagnetic relay according to claim 3, wherein: the limiting convex arm and the movable spring leading-out sheet are integrally formed, and the limiting convex arm is in an inclined state.

5. The electromagnetic relay according to any of claims 1-4, characterized in that: the limiting structure is back to back opposite to the contact point of the movable spring and the movable contact.

6. The electromagnetic relay according to claim 1, characterized in that: the movable spring is connected with the armature of the magnetic circuit system through a pushing clamp.

7. The electromagnetic relay of claim 6, wherein: one end of the pushing clamp comprises two first connecting arms which are arranged side by side, U-shaped clamping grooves with downward openings are formed in the bottom surfaces of the two first connecting arms respectively, and the U-shaped clamping grooves of the two first connecting arms clamp the left end and the right end of the top of the movable spring respectively.

8. The electromagnetic relay of claim 6, wherein: the other end of the pushing clamp comprises two second connecting arms which are arranged side by side and a limiting arm which is arranged between the two second connecting arms, the tail ends of the two second connecting arms are respectively provided with a limiting flange, the tops of the left side wall and the right side wall of the armature are respectively provided with a limiting notch, the two second connecting arms respectively penetrate through the two limiting notches of the armature one by one, the limiting flanges are matched on the outer side of the armature, and the limiting arms are matched on the inner side of the armature.