A restoring reed and magnetic circuit system cooperation structure

Abstract

The application belongs to the technical field of relays, and discloses a reset spring and magnetic circuit system cooperation structure. A containing groove is formed by sinking the upper surface of the base, and a reset spring longitudinal limiting piece is arranged at the bottom of the containing groove. A gap is left between the top of the reset spring longitudinal limiting piece and the bottom of the yoke for the reset spring to pass through. One side of the reset spring is arranged in the gap, and the other side is riveted and fixed with the armature. The armature is pressed against the yoke edge under the action of the counterforce of the reset spring. A plate or a boss is arranged on the base, and a gap is formed between the plate or the boss and the yoke, so that the longitudinal positioning of the reset spring is realized. By changing the fixing form between the reset spring and the yoke, the counterforce of the reset spring is consistent during the attraction and release of the relay, and the phenomenon of sudden change of the counterforce of the reset spring is avoided.

Description

Technical Field

[0001] This invention belongs to the field of relay technology and relates to a structure for cooperating a restoring reed and a magnetic circuit system. Background Technology

[0002] A relay is an electrical control device commonly used in automated control circuits. When voltage is applied to the copper coil in the control circuit of an electromagnetic relay, the electromagnetic system consisting of the iron core, yoke, and coil generates an electromagnetic attraction. Under the action of this attraction, the armature overcomes the reaction force of the return spring and moves towards the iron core, causing the moving contact of the moving spring to move forward and contact the stationary contact of the stationary spring, thus completing the output circuit. When the coil is de-energized, the electromagnetic attraction disappears, and the armature, under the reaction force of the return spring, pulls the moving spring backward, causing the moving contact of the moving spring to move backward and disconnect from the stationary contact of the stationary spring, thus breaking the output circuit. An electromagnetic relay ultimately achieves the function of connecting or disconnecting a circuit through the engagement or disengagement of the moving and stationary contacts.

[0003] In most existing relays, the reset spring is positioned and engaged with the armature and yoke. The upper part of the reset spring is riveted to the armature, and the lower part is riveted to the yoke or secured by a structural clamp. When the relay is de-energized, the reset spring pulls the armature and pushes the clamp, causing the relay contacts to open. In this structure, because the reset spring and yoke are clamped and fixed, the reaction force of the reset spring increases linearly during relay engagement. As the relay armature and core surface approach each other, the reset spring deforms and tightens, and the clamped position and yoke are subjected to force, causing the reaction force curve of the reset spring to rise abruptly. This abrupt change in the reaction force curve results in a large relay reaction force, leading to more defective relays after assembly, increased production line difficulty, and low efficiency. Furthermore, due to the abrupt change in relay reaction force, some relays exhibit insufficient magnetic circuit contact, posing a potential threat to the relay's lifespan and safety. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a structure for cooperating between the restoring spring and the magnetic circuit system. By changing the fixing form between the restoring spring and the yoke, the magnitude of the reaction force of the restoring spring is made consistent during the relay's activation and deactivation, thus avoiding sudden changes in the reaction force of the restoring spring.

[0005] This invention is achieved through the following technical solution:

[0006] A matching structure of a return reed and a magnetic circuit system, comprising a base, a return reed and a magnetic circuit system; the magnetic circuit system comprises a yoke, an iron core, an armature and a coil former with a coil; the coil former is mounted on the upper surface of the base, one side of the yoke is located at the bottom of the coil former, and the other side is riveted and fixed with the iron core, and the iron core penetrates into the through hole of the coil former; the upper surface of the base sinks to form an accommodation groove, a longitudinal limiting member for the return reed is provided at the bottom of the accommodation groove, and a gap for the return reed to pass through is reserved between the top of the longitudinal limiting member for the return reed and the bottom of the yoke;

[0007] One side of the return reed is placed in the gap, and the other side is riveted and fixed with the armature; the armature can be pressed against the knife edge of the yoke under the action of the return reed.

[0008] Further, the longitudinal limiting member for the return reed comprises a plate member and two sets of convex columns arranged at the bottom of the accommodation groove and symmetrically arranged about the center line of the short side of the bottom of the accommodation groove; the plate member is located between the two sets of convex columns, and the convex columns are attached to the long sides of the plate member; the short sides of the plate member are both attached to the side walls of the accommodation groove; a gap for the return reed to pass through is reserved between the top of the plate member and the bottom of the yoke;

[0009] One side of the return reed is placed in the gap, and the other side is riveted and fixed with the armature; the armature is pressed against the knife edge of the yoke under the reaction force of the return reed.

[0010] Further, alternatively, the longitudinal limiting member for the return reed comprises one or more convex platforms, and a gap for the return reed to pass through is reserved between the top of the convex platforms and the bottom of the yoke;

[0011] One side of the return reed is placed in the gap, and the other side is riveted and fixed with the armature; the armature is pressed against the knife edge of the yoke under the reaction force of the return reed.

[0012] Further, a set of L-shaped limiting platforms symmetrically arranged about the center line of the short side of the accommodation groove extends upward from the bottom of the accommodation groove, and the bent portion of the return reed is placed on the L-shaped limiting platforms.

[0013] Further, the two sets of convex columns and the one set of L-shaped limiting platforms are sequentially distributed along the long side of the accommodation groove, and both the convex columns and the L-shaped limiting platforms are closely attached to the inner side wall of the accommodation groove.

[0014] Further, the return reed is L-shaped, one side of the return reed is placed in the gap, and the other side is riveted and fixed with the armature.

[0015] Further, the base extends upward to form a first fixing groove symmetrically arranged about the center line of the short side of the upper surface of the base, and a second fixing groove and a third fixing groove distributed on both sides of the center line of the short side of the upper surface of the base, and the first fixing groove, the second fixing groove and the third fixing groove are all in a U-shaped structure;

[0016] The openings of the first fixing groove are symmetrically arranged and face each other; the openings of the second fixing groove and the third fixing groove are also opposite each other.

[0017] The coil frame is provided with a first protrusion, a second protrusion and a third protrusion; the first protrusion extends entirely into the first fixing groove, the second protrusion extends partially into the second fixing groove, and the third protrusion extends partially into the third fixing groove;

[0018] The tops of the first fixing groove, the second fixing groove, and the third fixing groove are all provided with chamfered structures.

[0019] Furthermore, the gap between the first protrusion of the coil frame and the first fixing groove is the first glue groove; the gap between the second protrusion of the coil frame and the second fixing groove is the second glue groove; and the gap between the third protrusion of the coil frame and the third fixing groove is the third glue groove.

[0020] Furthermore, the first fixing groove, the second fixing groove, and the third fixing groove are all located on the same side of the middle crossbeam on the base; the two first fixing grooves are closely attached to the middle crossbeam, and the first fixing groove and the second fixing groove on one side are distributed sequentially along the long side of the upper surface of the base, while the first fixing groove and the third fixing groove on the other side are distributed sequentially along the long side of the upper surface of the base.

[0021] Furthermore, a first retaining wall is provided on the side of the first fixing slot opening away from the middle crossbeam of the base; a second retaining wall is provided on the side of the second fixing slot away from the middle crossbeam; and a third retaining wall is provided on the side of the third fixing slot away from the middle crossbeam.

[0022] Compared with the prior art, the present invention has the following beneficial technical effects:

[0023] 1. The novel restoring spring and magnetic circuit cooperation structure provided by this invention, by setting a longitudinal limiting member for the restoring spring on the base, a gap is formed between the top of the longitudinal limiting member and the bottom of the yoke, and one side of the restoring spring is placed in the gap, thereby achieving longitudinal positioning of the restoring spring through the gap; during the relay's engagement and release process, the restoring spring deforms. Since there is no fixation between the restoring spring and the yoke, the restoring spring can move within the gap, ensuring that the magnitude of the restoring spring's reaction force is consistent during the relay's engagement and release process, avoiding sudden changes in the reaction force of the restoring spring; the restoring spring can move within the gap, and there is no connection between the restoring spring and the yoke, so the armature is not subjected to the tension of the restoring spring during movement, and the contact point is stable; thus, the magnetic circuit contact of the relay is more sufficient, ensuring the service life of the relay and reducing potential safety hazards.

[0024] 2. The novel restoring spring and magnetic circuit matching structure provided by the present invention limits the restoring spring by forming a gap combination between the L-shaped limiting platform, the top of the plate or the top of the boss and the bottom of the yoke, which allows the restoring spring to pass through, preventing the restoring spring from moving randomly and failing to reset, and ensuring that the restoring spring and armature can work normally. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the device of the present invention;

[0026] Figure 2 When using sheet metal, Figure 1 A sectional view along section line AA;

[0027] Figure 3 When using sheet metal, Figure 1 A schematic diagram after removing the yoke, core, armature, coil frame, and restored reed;

[0028] Figure 4 When using a boss, Figure 1 A sectional view along section line AA;

[0029] Figure 5 When using a single boss, Figure 1 A schematic diagram after removing the yoke, core, armature, coil frame, and restored reed;

[0030] Figure 6 When using four bosses, Figure 1 A schematic diagram after removing the yoke, core, armature, coil frame, and restored reed;

[0031] Figure 7 for Figure 1 A schematic diagram of the second perspective (excluding the coil) in the image;

[0032] Reference numerals in the attached diagram: 1 is the base, 2 is the yoke, 3 is the iron core, 4 is the armature, 5 is the coil frame, 6 is the receiving groove, 7 is the protruding column, 8 is the plate, 9 is the restoring spring, 10 is the boss, 11 is the L-shaped limiting platform, 12 is the first fixing groove, 13 is the second fixing groove, 14 is the third fixing groove, 15 is the first retaining wall, 16 is the second retaining wall, 17 is the third retaining wall, 18 is the intermediate crossbeam, 19 is the first protrusion, 20 is the second protrusion, 21 is the third protrusion, 22 is the first glue groove, 23 is the second glue groove, and 24 is the third glue groove. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings. These descriptions are intended to explain the invention and not to limit it.

[0034] See Figure 1-7This invention discloses a structure for cooperating a restoring spring and a magnetic circuit system, including a base 1, a restoring spring 9, and a magnetic circuit system. The magnetic circuit system includes a yoke 2, an iron core 3, an armature 4, and a coil frame 5 with a coil. The coil frame 5 is installed on the upper surface of the base 1. One side of the yoke 2 is located at the bottom of the coil frame 5, and the other side is fixed to the iron core 3 by riveting. The iron core 3 passes through the through hole of the coil frame 5. The upper surface of the base 1 is recessed to form a receiving groove 6. The bottom of the receiving groove 6 is provided with a longitudinal limiting member for the restoring spring. A gap is left between the top of the longitudinal limiting member and the bottom of the yoke 2 for the restoring spring 9 to pass through. One side of the restoring spring 9 is placed in the gap, and the other side is fixed to the armature 4 by riveting. Under the action of the restoring spring 9, the armature 4 can be pressed against the blade of the yoke 2.

[0035] The longitudinal limiting component of the restoring spring includes a plate 8 and two sets of protrusions 7 located at the bottom of the receiving groove 6 and symmetrically arranged about the center line of the short side of the bottom of the receiving groove 6; the plate 8 is located between the two sets of protrusions 7, and the protrusions 7 are in contact with the long side of the plate 8; the short sides of the plate 8 are in contact with the side wall of the receiving groove 6; a gap is left between the top of the plate 8 and the bottom of the yoke 2 for the restoring spring 9 to pass through; one side of the restoring spring 9 is placed in the gap, and the other side is riveted and fixed to the armature 4; under the action of the restoring spring 9, the armature 4 can be pressed against the blade of the yoke 2.

[0036] Specifically, the protruding post 7 and the base 1 are integrally formed; the plate 8 is made of iron or plastic. When the plate 8 is made of iron, the plate 8 and the yoke 2 will form a magnetic circuit. In this way, when the magnetic field passes through the magnetic circuit formed by the plate 8 and the yoke 2, its magnetic field resistance will be greatly reduced and the loss will be much smaller, thus ensuring the strength of the magnetic field.

[0037] The following are alternatives to the protruding post 7 and the plate 8 in this invention:

[0038] The longitudinal limiting member of the restoring spring includes one or more bosses 10, and a gap is left between the top of the bosses 10 and the bottom of the yoke 2 for the restoring spring 9 to pass through; one side of the restoring spring 9 is placed in the gap, and the other side is riveted and fixed to the armature 4; under the action of the restoring spring 9, the armature 4 can be pressed against the blade of the yoke 2.

[0039] Specifically, the boss 10 and the base 1 are integrally formed; when there is only one boss 10, the boss 10 and the plate 8 are in the same position and have the same area; when the area of ​​the boss 10 is 1-20mm2, the number of bosses 10 is not less than 3; when the area of ​​the boss 10 is greater than 20mm2, the number of bosses 10 is unlimited.

[0040] The bottom of the receiving groove 6 extends upward to form a set of L-shaped limiting platforms 11 symmetrically arranged about its short side center line, and the bent part of the restoring spring 9 is placed on the L-shaped limiting platform 11.

[0041] Specifically, a clearance combination allowing the restoring reed 9 to pass through is formed between the L-shaped limit table 11, the top of the plate member 8 or the top of the boss 10 and the bottom of the yoke 2, which limits the restoring reed 9 to prevent the occurrence of abnormal movement and failure to reset of the restoring reed 9.

[0042] Two groups of convex columns 7 and one group of L-shaped limit tables 11 are sequentially distributed along the long side of the accommodating groove 6, and both the convex columns 7 and the L-shaped limit tables 11 are tightly attached to the inner side wall of the accommodating groove 6.

[0043] The restoring reed 9 is L-shaped, one side of the restoring reed 9 is disposed in the gap, and the other side is riveted and fixed to the armature 4.

[0044] The base 1 extends upward to form first fixing grooves 12 symmetrically arranged about the short-side center line of the upper surface of the base 1, as well as a second fixing groove 13 and a third fixing groove 14 distributed on both sides of the short-side center line of the upper surface of the base 1, wherein the first fixing grooves 12, the second fixing groove 13 and the third fixing groove 14 are all in a "凵"-shaped structure;

[0045] The symmetrically arranged first fixing grooves 12 have opposite openings, and the second fixing groove 13 and the third fixing groove 14 have opposite openings; the coil frame 5 is provided with a first convex portion 19, a second convex portion 20 and a third convex portion 21; the first convex portion 19 completely extends into the first fixing groove 12, a part of the second convex portion 20 extends into the second fixing groove 13; and a part of the third convex portion 21 extends into the third fixing groove 14.

[0046] Specifically, when the "凵"-shaped first fixing grooves 12 are assembled with the convex columns 7 of the coil frame 5, cracking can be avoided. The first fixing grooves 12, the second fixing groove 13 and the third fixing groove 14 can fully utilize the space above the base 1 and increase the depths of the first fixing grooves 12, the second fixing groove 13 and the third fixing groove 14, the matching area between the base 1 and the coil frame 5 is increased, and the fixing strength of the coil frame 5 can be improved. After assembly, the magnetic path components can be prevented from displacing back and forth and left and right on the base 1, and at the same time prevented from separating from the base 1.

[0047] The first fixing grooves 12, the second fixing groove 13 and the third fixing groove 14 are all located on the same side of the intermediate cross beam 18 on the base 1; the two first fixing grooves 12 are both tightly attached to the intermediate cross beam 18, the first fixing groove 12 and the second fixing groove 13 on one side are sequentially distributed along the long side of the upper surface of the base 1, and the first fixing groove 12 and the third fixing groove 14 on the other side are sequentially distributed along the long side of the upper surface of the base 1.

[0048] A first retaining wall 15 is provided on the side, facing away from the intermediate cross beam 18 of the base 1, of the inner opening side of the first fixing groove 12; a second retaining wall 16 is provided on the side, facing away from the intermediate cross beam 18, of the second fixing groove 13, and a third retaining wall 17 is provided on the side, facing away from the intermediate cross beam 18, of the third fixing groove 14.

[0049] The gap between the first protrusion 19 of the coil frame 5 and the first fixing groove 12 is the first glue groove 22; the gap between the second protrusion 20 of the coil frame 5 and the second fixing groove 13 is the second glue groove 23; and the gap between the third protrusion 21 of the coil frame 5 and the third fixing groove 14 is the third glue groove 24.

[0050] The tops of the first fixing groove 12, the second fixing groove 13 and the third fixing groove 14 are all provided with chamfered structures.

[0051] Specifically, the chamfered structures at the top of the first fixing groove 12, the second fixing groove 13, and the third fixing groove 14 guide the assembly of the coil frame 5 and the base 1, reducing the assembly accuracy of the coil frame 5 and the base 1; adhesive is dispensed into the first glue dispensing groove 22, the second glue dispensing groove 23, and the third glue dispensing groove 24 respectively at the chamfered structures at the top of the first fixing groove 12, the second fixing groove 13, and the third fixing groove 14, and the adhesive flows into the first glue dispensing groove 22, the second glue dispensing groove 23, and the third glue dispensing groove 24 respectively through the chamfered structures at the top of the first fixing groove 12, the second fixing groove 13, and the third fixing groove 14. Inside the groove 24, after the adhesive cures, it can significantly improve the bonding force between the coil frame 5 and the base 1. The first baffle 15 is used to increase the contact area between the adhesive and the first glue groove 22, the second baffle 16 is used to increase the contact area between the adhesive and the second glue groove 23, and the third baffle 17 is used to increase the contact area between the adhesive and the third glue groove 24. At the same time, the first baffle 15 can prevent the adhesive dripping into the first glue groove 22 from overflowing, the second baffle 16 can prevent the adhesive dripping into the second glue groove 23 from overflowing, and the third baffle 17 can prevent the adhesive dripping into the third glue groove 24 from overflowing.

[0052] The embodiments given above are preferred examples for implementing the present invention, and the present invention is not limited to the above embodiments. Any non-essential additions or substitutions made by those skilled in the art based on the technical features of the present invention are within the protection scope of the present invention.

Claims

1. A structure for cooperating a restoring reed and a magnetic circuit system, comprising a base (1), a restoring reed (9), and a magnetic circuit system; the magnetic circuit system comprising a yoke (2), an iron core (3), an armature (4), and a coil frame (5) with a coil; the coil frame (5) is mounted on the upper surface of the base (1), one side of the yoke (2) is located at the bottom of the coil frame (5), and the other side is fixed to the iron core (3) by riveting, the iron core (3) being inserted into a through hole in the coil frame (5); characterized in that, An upper surface of the base (1) sinks to form an accommodating groove (6), a restoring reed longitudinal limiting member is arranged at the bottom of the accommodating groove (6), and a gap allowing the restoring reed (9) to pass through is reserved between the top of the restoring reed longitudinal limiting member and the bottom of the yoke (2); A group of L-shaped limiting tables (11) symmetrically arranged about the short-side center line of the accommodating groove (6) are formed by extending upward from the bottom of the accommodating groove (6), and the bent part of the restoring reed (9) is placed on the L-shaped limiting tables (11); One side of the restoring reed (9) is arranged in the gap, and the other side is riveted and fixed to the armature (4); the armature (4) can be pressed against the knife edge of the yoke (2) under the action of the restoring reed (9).

2. The structure for cooperating between a restoring reed and a magnetic circuit system according to claim 1, characterized in that, The restoring reed longitudinal limiting member comprises a plate (8) and two groups of convex columns (7) which are located at the bottom of the accommodating groove (6) and symmetrically arranged about the short-side center line of the bottom of the accommodating groove (6); the plate (8) is located between the two groups of convex columns (7), and the convex columns (7) are attached to the long sides of the plate (8); both short sides of the plate (8) are attached to the side walls of the accommodating groove (6); a gap allowing the restoring reed (9) to pass through is reserved between the top of the plate (8) and the bottom of the yoke (2).

3. The structure for cooperating between a restoring reed and a magnetic circuit system according to claim 1, characterized in that, Alternatively, the restoring reed longitudinal limiting member comprises one or more convex platforms (10), and a gap allowing the restoring reed (9) to pass through is reserved between the top of the convex platforms (10) and the bottom of the yoke (2).

4. The structure for cooperating between a restoring reed and a magnetic circuit system according to claim 1, characterized in that, The two groups of convex columns (7) and the group of L-shaped limiting tables (11) are sequentially distributed along the long side of the accommodating groove (6), and both the convex columns (7) and the L-shaped limiting tables (11) are closely attached to the inner side wall of the accommodating groove (6).

5. The structure for cooperating between a restoring reed and a magnetic circuit system according to claim 1, characterized in that, The restoring reed (9) is L-shaped, one side of the restoring reed (9) is arranged in the gap, and the other side is riveted and fixed to the armature (4).

6. The structure for cooperating between a restoring reed and a magnetic circuit system according to claim 1, characterized in that, The base (1) extends upward to form first fixing grooves (12) symmetrically arranged about the short-side center line of the upper surface of the base (1), and a second fixing groove (13) and a third fixing groove (14) distributed on both sides of the short-side center line of the upper surface of the base (1), wherein the first fixing grooves (12), the second fixing groove (13) and the third fixing groove (14) are all in a U-shaped structure; The openings of the symmetrically arranged first fixing grooves (12) face each other, and the openings of the second fixing groove (13) and the third fixing groove (14) face each other; A first convex portion (19), a second convex portion (20) and a third convex portion (21) are arranged on the bobbin (5); the whole of the first convex portion (19) extends into the first fixing groove (12), a part of the second convex portion (20) extends into the second fixing groove (13); and a part of the third convex portion (21) extends into the third fixing groove (14); Beveled structures are arranged at the tops of the first fixing groove (12), the second fixing groove (13) and the third fixing groove (14).

7. The structure for cooperating between a restoring reed and a magnetic circuit system according to claim 6, characterized in that, A gap between the first convex portion (19) of the bobbin (5) and the first fixing groove (12) is a first glue dispensing groove (22); a gap between the second convex portion (20) of the bobbin (5) and the second fixing groove (13) is a second glue dispensing groove (23); a gap between the third convex portion (21) of the bobbin (5) and the third fixing groove (14) is a third glue dispensing groove (24).

8. The structure for cooperating between a restoring reed and a magnetic circuit system according to claim 7, characterized in that, The first fixing groove (12), the second fixing groove (13) and the third fixing groove (14) are all located on the same side of the middle crossbeam (18) on the base (1); the two first fixing grooves (12) are closely attached to the middle crossbeam (18), the first fixing groove (12) and the second fixing groove (13) on one side are distributed sequentially along the long side of the upper surface of the base (1), and the first fixing groove (12) and the third fixing groove (14) on the other side are distributed sequentially along the long side of the upper surface of the base (1).

9. The structure for cooperating between a restoring reed and a magnetic circuit system according to claim 8, characterized in that, The first fixing groove (12) has a first retaining wall (15) on the side of the opening away from the middle crossbeam (18) of the base (1); the second fixing groove (13) has a second retaining wall (16) on the side away from the middle crossbeam (18); and the third fixing groove (14) has a third retaining wall (17) on the side away from the middle crossbeam (18).

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