Relay

Abstract

The utility model discloses a relay, comprising: a magnetic circuit driving part comprising a skeleton, a coil, an iron core, a yoke and an armature, the coil comprising a cylinder, and a first installation part and a second installation part arranged at two axial ends of the cylinder; the contact part is mounted on the first mounting part and comprises a movable spring module and a static spring module, the static spring module comprises a static spring sheet and a static contact arranged on the static spring sheet, and the movable spring module comprises a movable spring sheet and a movable contact arranged on the movable spring sheet; wherein the first mounting part is provided with a clamping groove for clamping the static reed, and the groove wall of the clamping groove is provided with a first convex rib and / or the static reed is provided with a second convex rib, so that the static reed is clamped in the clamping groove; the first installation part is provided with a groove, and the groove faces the movable contact and the static contact. According to the relay provided by the utility model, interference fit installation is carried out through the projection and the static reed, so that the installation stability of the static reed is ensured; by arranging the groove on the first mounting part, the creepage distance of an electric arc is increased so as to achieve an arc extinguishing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a relay. Background Art

[0002] An electromagnetic relay is an electrical device that uses electromagnetic force to drive mechanical components to move relative to each other to produce a predetermined response. It generally consists of a magnetic circuit part, a moving reed part, and a static reed part. The magnetic circuit part includes an iron core, a skeleton, a coil, an armature, and a yoke. When an electric current passes through the coil, an electromagnetic force is generated, and the armature is attracted and contacts the pole face at one end of the iron core, thereby driving the moving contact of the moving reed part to close with the static contact of the static reed part; when the current in the coil disappears, the electromagnetic force also disappears, the armature resets and separates from the pole face at one end of the iron core, so that the moving contact of the moving reed part separates from the static contact of the static reed part. In this way, by the contact or separation of the moving contact and the static contact, the purpose of turning on or off the circuit of the external load is achieved.

[0003] In a relay, the static reed is installed on the skeleton. To avoid the skeleton deforming the static reed, the static reed is installed on the skeleton with a clearance fit, which may cause the static reed to shake, that is, the contacts shake, resulting in unstable closing between the contacts. Summary of the Utility Model

[0004] To solve at least one of the problems existing in the above-mentioned prior art, according to one aspect of the present utility model, a relay is provided, including:

[0005] A magnetic circuit driving part, including a skeleton, a coil, an iron core, a yoke, and an armature, wherein the coil includes a cylindrical body and first and second mounting parts provided at both axial ends of the cylindrical part;

[0006] A contact part, installed on the first mounting part, including a moving reed module and a static reed module. The static reed module includes a static reed and a static contact provided on the static reed, and the moving reed module includes a moving reed and a moving contact provided on the moving reed;

[0007] Wherein, the first mounting part is provided with a slot for clamping the static reed, and the slot wall of the slot is provided with a first rib and / or the static reed is provided with a second rib to clamp the static reed in the slot; and the first mounting part is provided with a groove facing the moving contact and the static contact.

[0008] In some embodiments, the slot wall of the slot is provided with the first rib.

[0009] In some embodiments, along a direction perpendicular to the closing or opening direction of the moving contact and the static contact, the first ribs are provided on both opposite sides of the first mounting part.

[0010] In some embodiments, grooves are provided on both opposite sides of the first mounting portion along a direction perpendicular to the closing or opening direction of the moving contact and the static contact.

[0011] In some embodiments, one end of the groove facing away from the coil is an open end, and one end facing the coil is a closed end.

[0012] In some embodiments, the yoke has an end face for the armature to swing, and a protrusion is provided on the inner wall of the through hole of the cylinder body. The protrusion is used for interference fit with the iron core to fix the iron core in the cylinder body.

[0013] In some embodiments, a plurality of separated protrusions are provided on the inner wall of the cylinder body along the circumferential direction of the cylinder body.

[0014] In some embodiments, the rib is provided at the same height as the cylinder body.

[0015] In summary, the relay provided by the present utility model has the following technical effects:

[0016] By providing the first rib on the groove wall of the card slot for installing the static reed and / or the second rib on the static reed, when the static reed is clamped in the card slot, the first rib can be in interference fit with the static reed and / or the second rib can be in interference fit with the skeleton, so as to fix the static reed. Since the interference fit method of the rib is adopted, the opening area of the rib is small, and the contact area during the interference between the static reed and the first mounting portion can be reduced, thereby avoiding the situation that the static reed shakes during the use of the relay; at the same time, by providing a groove on one side of the first mounting portion facing the moving contact and the static contact, when an arc is generated when the moving contact and the static contact are disconnected, the arc will travel along the groove wall, thereby increasing the creepage distance of the arc to achieve the effect of arc extinction and increasing the use safety of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the relay according to the embodiment of the present utility model;

[0018] Figure 2 is Figure 1 the exploded schematic diagram of the relay in

[0019] Figure 3 is Figure 1 the schematic structural diagram of the skeleton and the static reed in

[0020] Figure 4 is Figure 1 the schematic structural diagram of the skeleton in

[0021] Accompanying drawings: 100 - relay, 10 - magnetic circuit driving part, 11 - skeleton, 111 - cylinder body, 1111 - through hole, 1112 - protrusion, 112 - first mounting part, 1121 - clamping groove, 1122 - first rib, 1123 - groove, 113 - second mounting part, 12 - coil, 13 - iron core, 14 - yoke iron, 15 - armature, 20 - contact part, 21 - moving spring module, 211 - moving spring piece, 212 - static contact, 22 - static spring module, 221 - static spring piece, 222 - moving contact. Detailed implementation mode

[0022] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Please refer to Figure 1 , when the relay 100 is installed, the static spring piece 221 is clamped on the skeleton 11, and the static spring piece 221 and the skeleton 11 have a relatively large relative area. In order to avoid the skeleton 11 pressing and deforming the static spring piece 221, the static spring piece 221 is clamped on the skeleton 11 in a clearance fit manner. As a result, during the use of the relay 100, the static spring piece 221 will drive the static contact 212 to shake, resulting in poor contact between the static contact 212 and the moving contact 222, and causing instability in the electrical conduction of the load.

[0027] Please refer to Figures 1 to 4 , the relay 100 provided by the embodiment of the present invention includes a magnetic circuit driving part 10 and a contact part 20.

[0028] Among them, the magnetic circuit driving part 10 includes a bobbin 11, a coil 12, an iron core 13, a yoke 14 and an armature 15. The coil 12 includes a cylindrical body 111 and a first mounting portion 112 and a second mounting portion 113 provided at the axial two ends of the cylindrical body 111; the contact part 20 is mounted on the second mounting portion 113 and includes a moving spring module 21 and a static spring module 22. The static spring module 22 includes a static spring piece 221 and a static contact 212 provided on the static spring piece 221. The moving spring module 21 includes a moving spring piece 211 and a moving contact 222 provided on the moving spring piece 211. Both the static spring piece 221 and the moving spring piece 211 are mounted on the first mounting portion 112; among them, the first mounting portion 112 is provided with a slot 1121 for clamping the static spring piece 221, and a first rib 1122 is provided on the wall of the slot 1121 and / or a second rib is provided on the static spring piece 221 to clamp the static spring piece 221 in the slot 1121; and a groove is provided on the first mounting portion 112, and the groove is arranged facing the moving contact 222 and the static contact 212.

[0029] For the above relay 100, by setting the first rib 1122 on the wall of the slot 1121 for mounting the static spring piece 221 and / or setting the second rib on the static spring piece 221, when the static spring piece 221 is clamped in the slot 1121, interference fit can be carried out between the first rib 1122 and the static spring piece 221 and / or interference fit can be carried out between the second rib and the bobbin 11 to fix the static spring piece 221. Due to the interference fit method of the rib, the opening area of the rib is small, and the contact area during the interference between the static spring piece 221 and the first mounting portion 112 can be reduced, so as to avoid the situation that the static spring piece 221 shakes during the use of the relay 100; at the same time, by setting a groove 1123 on one side of the first mounting portion 112 facing the moving contact 222 and the static contact 212, when an arc is generated when the moving contact 222 and the static contact 212 are disconnected, the arc will travel along the wall of the groove 1123, thereby increasing the creepage distance of the arc to achieve the arc extinguishing effect and increasing the use safety of the relay 100.

[0030] Among them, the yoke 14 constitutes a part of the magnetic circuit through which the magnetic flux generated by the coil 12 passes. The armature 15 is supported by the yoke 14 and is swingably arranged relative to the yoke 14 so as to be able to attract and disconnect from the iron core 13, thereby driving the closing or opening between the moving contact 222 and the static contact 212 mounted on the moving spring piece 211 of the yoke 14. The coil 12 of this embodiment is wound around the cylindrical body 111 and has coil terminals to be energized through the coil terminals and an external circuit. When the coil terminals are energized to the coil 12, under the action of the magnetic attraction force generated between the armature 15 and the iron core 13, the armature 15 rotates and contacts the iron core 13, and the moving contact 222 and the static contact 212 are closed, or the moving contact 222 is disconnected from the normally closed static contact 212 and is closed with the normally open static contact 212.

[0031] Among them, fixed terminals are provided on both the moving reed 211 and the static reed 221. The load is electrically conducted through the fixed terminals, and the power supply and non-power supply states of the load are switched by the electrical connection state and electrical cut-off state between the fixed terminals and the load.

[0032] Please refer to Figures 1 to 3 , specifically, in this embodiment, when setting the interference fit between the card slot 1121 and the static reed 221, since the skeleton 11 is a plastic part and is easy to form ribs, a first rib 1122 is provided on the groove wall of the card slot 1121. In this way, it is convenient to simultaneously form the first rib 1122 when injection molding the skeleton 11. Compared with the method of forming ribs on the static reed 221, the subsequent stamping process of the static reed 221 is avoided, making the formation of ribs more convenient.

[0033] Furthermore, in order to ensure the fixed state of the static reed 221, along the direction perpendicular to the closing direction or the opening direction of the moving contact 222 and the static contact 212, first ribs 1122 are provided on both opposite sides of the first mounting portion 112, that is, a hollow area is formed on the first mounting portion 112, and this hollow area is the mounting position of the static contact 212 and the moving contact 222. When the first rib 1122 is provided on the first mounting portion 112, the first rib 1122 is provided on both sides of the static contact 212, so as to have more interference fit points with the static reed 221 through the first rib 1122, further ensuring the mounting stability of the static reed 221 on the first mounting portion 112.

[0034] Among them, when first ribs 1122 are provided on both opposite sides of the first mounting portion 112 along the direction perpendicular to the closing direction or the opening direction of the moving contact 222 and the static contact 212, the same number of first ribs 1122 can be provided on each side, or different numbers of first ribs 1122 can be provided on both sides; only one first rib 1122 can be provided on each side, or multiple first ribs 1122 can be provided on each side, which is not limited here.

[0035] Please refer to Figure 3 and Figure 4 , when a groove 1123 is provided on the first mounting portion 112, the end of the groove 1123 facing away from the coil 12 is an open end, and the end facing the coil 12 is a closed end, so as to ensure the structural strength of the first mounting portion 112 at the position where the groove 1123 is provided through the side wall for closing, and through the open end, to avoid the side wall providing a medium for arc creepage and shortening the arc creepage distance. In other embodiments, both ends can also be set as open ends according to needs.

[0036] When the iron core 13 in the prior art is inserted into the cylinder 111, in order to prevent the over-inserted iron core 13 from splitting the cylinder 111, the iron core 13 and the inner wall of the cylinder 111 are in a clearance fit state. As a result, after the iron core 13 is installed, it will have an inclination relative to the end of the cylinder 111 and cannot be parallel to the end face of the yoke iron 14 for the armature 15 to rotate. Therefore, when the armature 15 and the iron core 13 are attracted to each other, they cannot be in a fully attracted state. To improve this defect, please refer to Figure 4 , in an embodiment of the present invention, in order to ensure the suction force when the armature 15 and the iron core 13 are attracted to each other, the yoke iron 14 has an end face for the armature 15 to swing. A protrusion 1112 is provided on the inner wall of the through hole 1111 of the cylinder 111. The protrusion 1112 is used for interference fit with the iron core 13 to fix the iron core 13 in the cylinder 111, so as to make the end face of the iron core 13 parallel to the end face of the yoke iron 14. After the iron core 13 is installed in the cylinder 111, the armature 15 only has an interference fit with the protrusion 1112, avoiding the situation of splitting the cylinder 111. Therefore, when the armature 15 and the iron core 13 are attracted to each other, the armature 15 can be completely attracted to the end face of the iron core 13, ensuring the magnitude of the suction force between the static contact 212 and the moving contact 222.

[0037] Further, in order to ensure the installation stability of the iron core 13, along the circumferential direction of the cylinder 111, a plurality of separated protrusions 1112 are provided on the inner wall of the cylinder 111 to perform interference fit with the iron core 13 through the plurality of protrusions 1112, ensuring the certainty of the installation position of the iron core 13 in the cylinder 111. At the same time, although the iron core 13 is in interference fit with the plurality of protrusions 1112, the total contact area with all the protrusions 1112 is much smaller than the total contact area when in interference fit with the inner wall of the cylinder 111. Therefore, the risk of splitting the cylinder 111 is also avoided.

[0038] Further, the protrusion 1112 is set to be equal in height to the cylinder 111, that is, the protrusion 1112 has a holding force with the iron core 13 along the axial direction of the cylinder 111, which is convenient for the formation of the protrusion 1112.

[0039] In the above relay 100, by providing the first rib 1122 on the groove wall of the card slot 1121 to clamp the static reed 221 through the first rib 1122, the stability of the installation position of the static reed 221 is ensured. Since the contact area between the first rib 1122 and the static reed 221 is small, the situation of the static reed 221 being pressed and deformed is avoided; by providing the protrusion 1112 on the inner wall of the through hole 1111 of the cylinder 111 and performing interference fit between the protrusion 1112 and the iron core 13, when ensuring the determination of the installation position of the iron core 13 in the cylinder 111, the end face of the iron core 13 can be flush with the end face of the yoke iron 14, so as to ensure the fitting effect when the armature 15 and the iron core 13 are attracted to each other.

[0040] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions formed by any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of the present utility model.

Claims

1. A relay (100), characterized in that: include: The magnetic circuit driving part (10) comprises a frame (11), a coil (12), an iron core (13), a yoke (14) and an armature (15); the coil (12) comprises a cylinder (111) and a first mounting part (112) and a second mounting part (113) arranged at two axial ends of the cylinder; A contact portion (20) is mounted on the first mounting portion (112), comprising a movable spring module (21) and a static spring module (22), wherein the static spring module (22) comprises a static spring sheet (221) and a static contact point (212) disposed on the static spring sheet (221), and the movable spring module (21) comprises a movable spring sheet (211) and a movable contact point (222) disposed on the movable spring sheet (211); The first mounting portion (112) is provided with a slot (1121) for clamping the static reed (221), a first convex rib (1122) is provided on the slot wall of the slot (1121) and / or the static reed (221) is provided with a second convex rib, so as to clamp the static reed (221) in the slot (1121); and the first mounting portion (112) is provided with a groove (1123), and the groove (1123) is arranged toward the moving contact (222) and the static contact (212).

2. The relay (100) according to claim 1, characterized in that: The first convex rib (1122) is provided on the groove wall of the clamping groove (1121).

3. The relay (100) according to claim 2, characterized in that: The first convex ribs (1122) are provided on opposite sides of the first mounting portion (112) along a closing direction or an opening direction perpendicular to the moving contact (222) and the stationary contact (212).

4. The relay (100) according to any one of claims 1 to 3, characterized in that: The grooves (1123) are provided on opposite sides of the first mounting portion (112) along a closing direction or an opening direction perpendicular to the moving contact (222) and the stationary contact (212).

5. The relay (100) according to claim 4, characterized in that: The end of the groove (1123) facing away from the coil (12) is an open end, and the end facing the coil (12) is a closed end.

6. The relay (100) according to any one of claims 1 to 3, characterized in that: The yoke (14) has an end surface for the armature (15) to swing, and a protrusion (1112) is provided on the inner wall of the through hole (1111) of the cylinder (111), and the protrusion (1112) is used to have an interference fit with the iron core (13) so as to fix the iron core (13) in the cylinder (111).

7. The relay (100) according to claim 6, characterized in that: Along the circumference of the cylinder (111), a plurality of separated protrusions (1112) are provided on the inner wall of the cylinder (111).

8. The relay (100) according to claim 6, characterized in that: The convex rib and the cylinder (111) are arranged at the same height.

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