CN220627706U - Movable spring part for increasing contact pressure and relay - Google Patents

Abstract

The utility model discloses a movable spring piece for increasing contact pressure, which comprises a movable spring piece, a movable spring piece and a movable spring piece, wherein the movable spring piece is provided with a deformation part and a contact free part; and the increasing reed is fixedly connected with the contact free part of the movable reed. Meanwhile, the relay comprises the movable spring piece and the magnetic circuit system, wherein the magnetic circuit system is provided with an armature, a yoke iron and an iron core wound with a coil, the armature iron of the magnetic circuit system is connected with a contact free part of the movable spring piece, the yoke iron of the magnetic circuit system is connected with a fastening connection part of the movable spring piece, the yoke iron is rotationally connected with the armature iron, and the coil is in an electrified state, the iron core magnetically attracts the armature iron to enable the armature iron to deflect towards the iron core, so that the contact pressure is effectively increased under the condition that the attraction force of the coil is not increased, and the problem of overlarge contact resistance between the movable contact and the fixed contact is avoided.

Description

Movable spring part for increasing contact pressure and relay

Technical Field

The utility model relates to the field of relays, in particular to a movable spring part for increasing contact pressure and a relay.

Background

A relay is an electrical control device that gives a prescribed input amount and is maintained for a sufficient period of time to cause a predetermined step change in the controlled amount in an electrical output circuit. When the input amount is reduced to a certain degree and kept for a long enough time, the state is restored to the original state.

In general, a relay includes a core, an armature, a movable contact spring provided with a movable contact, and a stationary contact capable of abutting and contacting the movable contact, and when the relay is in an energized state, the armature of the relay moves toward the core, and as a gap between the armature and the core decreases, a magnitude change of electromagnetic attraction increases exponentially. When the movable contact is just contacted with the static contact, the change rate of the electromagnetic attraction force is small, and the change rate of the electromagnetic attraction force is large after the armature is completely attracted.

In the design of the relay in the current industry, the contact pressure is one of the core elements of the design of the relay, in order to obtain enough contact pressure to avoid overlarge contact resistance between the movable contact and the fixed contact, the thickness of the movable reed is generally thickened, but the manner of increasing the contact pressure can increase the required attraction force of the coil, so that the electromagnetic attraction force of the relay cannot be fully utilized.

Disclosure of Invention

In order to overcome at least one defect in the prior art, the utility model provides a movable spring part and a relay for increasing contact pressure, which effectively increase the contact pressure without increasing the attraction force of a coil and avoid the problem of overlarge contact resistance between a movable contact and a stationary contact.

The utility model adopts the technical proposal for solving the problems that:

a movable spring member for increasing contact pressure, comprising:

the movable reed is provided with a deformation part and a contact free part, the contact free part is connected with the deformation part, and the contact free part is provided with a movable contact;

and the increasing reed is fixedly connected with the contact free part of the movable reed.

In some embodiments of the utility model, the enhancement reed covers at least part of the contact free portion.

In some embodiments of the present utility model, the movable spring is provided with a first connection hole, the extension spring extends from a side of the contact free portion, which is close to the free end of the movable spring, to the first connection hole along the extending direction of the movable spring, and the first connection hole is used for riveting the armature.

In some embodiments of the present utility model, the reinforcing hole is disposed on the reinforcing plate, and the reinforcing hole is disposed corresponding to the first connection hole.

In some embodiments of the present utility model, the movable reed is provided with a plurality of layers of the enhancement reed.

In some embodiments of the present utility model, a side surface of the movable spring, which is used for contacting with the armature in a abutting manner, is defined as a first movable spring surface, a side surface, which is far away from the armature and is opposite to the first movable spring surface, is defined as a second movable spring surface, and the added spring is arranged on the second movable spring surface.

In some embodiments of the present utility model, the deformation portion is provided with a material reduction region extending along a length extension direction of the movable reed.

In some embodiments of the present utility model, the movable contact spring further includes a fastening connection portion provided with a second connection hole for connecting the yoke, the fastening connection portion being connected to the deformation portion.

In some embodiments of the present utility model, the fastening connection portion includes a pin body piece, a first epitaxial piece and a second epitaxial piece, a body connection hole is provided on the pin body piece, epitaxial connection holes are provided on the first epitaxial piece, the first epitaxial piece and the second epitaxial piece can be folded to the pin body piece, and the body connection hole is communicated with the epitaxial connection hole to form the second connection hole.

The utility model also discloses a relay, which comprises:

the movable spring piece for increasing the contact pressure;

the magnetic circuit system is provided with an armature, a yoke and an iron core wound with a coil, the armature of the magnetic circuit system is connected with a contact free part of the movable spring piece, the yoke of the magnetic circuit system is connected with a fastening connection part of the movable spring piece, the yoke is rotationally connected with the armature, and the iron core magnetically attracts the armature in an electrified state so that the armature deflects towards the iron core.

In summary, the movable spring part and the relay for increasing the contact pressure provided by the utility model have the following technical effects:

through increasing the increase reed at the contact free portion of movable reed, form the contact free portion increase thickness of movable reed in order to improve the purpose of movable reed's contact pressure, avoided the too big problem of contact resistance between movable contact and the stationary contact to eliminate the contact resistance too big risk that leads to the temperature of relay to rise, simultaneously, still improved the stability in use and the life of relay. The deformation part generated in the suction process of the movable reed keeps the original design thickness, so that the suction force required by the movable reed is not required to be increased, the electromagnetic suction force of the relay can be fully utilized, and in addition, the movable reed part for increasing the contact pressure is simple in structure, easy to produce and assemble and high in reliability.

Drawings

FIG. 1 is a schematic view of a moving spring element for increasing contact pressure according to the present utility model;

FIG. 2 is an exploded view of a moving spring element for increasing contact pressure in accordance with the present utility model;

fig. 3 is a schematic view showing the deployment structure of the movable reed in the present utility model.

Icon: the device comprises a movable reed, an 11-deformation part, a 12-contact free part, a 13-fastening connection part, a 131-pin main body piece, a 132-first epitaxial piece, a 133-second epitaxial piece, a 2-reinforcing reed, a 21-reinforcing hole, a 3-armature, a 31-riveting bulge, a 41-first connection hole, a 42-second connection hole, a 421-main body connection hole, a 422-epitaxial connection hole, a 51-movable contact, a 52-stationary contact and a 6-material reduction area.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

With the rapid development of new energy and photovoltaic industry, the requirements of the photovoltaic field on product temperature rise, electric life and short circuit resistance are also higher and higher, and on the basis of keeping the characteristics of small volume and small coil power, the relay is required to have lower temperature rise, higher electric life and stronger short circuit resistance.

The present embodiment is to achieve the above-described specific object, and to increase the contact pressure to improve the short-circuit resistance of the relay without increasing the attraction force of the relay. Therefore, referring to fig. 1 and 2, the present embodiment discloses a moving spring member for increasing contact pressure, which includes:

the movable reed 1 is preferably a copper alloy with high conductivity, which has a deformation portion 11 and a contact free portion 12, the contact free portion 12 is connected with the deformation portion 11, and the connection is preferably formed integrally, that is, the contact free portion 12 and the deformation portion 11 are integrally formed, so that the movable reed 1 has good elastic deformation capability, and the contact free portion 12 is provided with a movable contact 51 capable of being in contact with the stationary contact 52.

Specifically, as shown in fig. 2, the movable spring 1 is provided with two first connecting holes 41, and the two first connecting holes 41 are used for riveting the armature 3 to firmly connect the movable spring 1 to the armature 3, and it should be noted herein that the movable spring is not limited to two first connecting holes 41, but may be one first connecting hole 41, three first connecting holes 41, four first connecting holes 41, five first connecting holes 41, and the like.

The portion extending from the first connecting hole 41 to the free end of the movable contact spring 1 is the contact free portion 12 of the movable contact spring 1, and the deformed portion 11 of the movable contact spring 1 is a portion extending from the first connecting hole 41 to the portion between the movable contact spring 1 and the yoke.

The core of this embodiment is that the movable spring member for increasing the contact pressure further comprises an increasing spring 2, and the increasing spring 2 is fixedly connected to the contact free portion 12 of the movable spring 1.

In the present embodiment, the thickness of the contact free portion 12 of the movable contact spring 1 is increased by the movable contact spring 2, that is, the thickness of the movable contact spring 1 is locally increased, not the thickness of the movable contact spring 1 is increased as a whole. In this way, the thickness of the deformation portion 11 does not increase, and the reaction force of the movable spring 1 does not increase, and the suction force does not need to be increased. While the formula of the contact pressure generated by the contact closure of the movable contact 51 of the movable contact spring 1 with the stationary contact 52 is as follows:

K＝Ebh3/4L3

wherein K is the plate constant of the movable reed 1, E is the elastic modulus of the movable reed 1, b is the width dimension of the movable reed 1, h is the thickness dimension of the movable reed 1, and L is the length dimension of the movable reed 1.

It should be noted that, assuming that the contact free portion 12 of the movable contact 1 is additionally provided with an increasing contact 2, and that the thickness of the increasing contact 2 is the same as that of the movable contact 1, this assumption is used only as an analysis description and is not limited to the present embodiment, i.e. the thickness of the increasing contact 2 and the number of increasing contacts 2 can be set differently according to the structural design and design requirements. Therefore, under the action of the increasing reed 2, the thickness of the contact free part 12 of the movable reed 1 is increased by two times, so that the deformation rate of the movable reed 1 is obviously increased compared with the two times of the deformation rate of the increasing reed 2 which is not increased by using the formula of the contact pressure, namely, the contact pressure of the movable contact 51 and the fixed contact 52 of the movable reed 1, which is in contact closure, is obviously increased, the contact stability between the movable contact 51 and the fixed contact 52 is ensured, and the problem of higher temperature rise caused by the increase of contact resistance is effectively avoided.

Unexpectedly, the movable contact 51 of the movable reed 1 contacts with the fixed contact 52 to be closed, and at the moment, current flows through the movable reed 1 and the increasing reed 2, so that the current carrying area of the current is increased, and the heat generated by the relay in the electrified state is reduced.

It should be noted that when the number of the reed 2 is plural, that is, when the movable reed 1 is provided with a plurality of layers of the reed 2 at the contact free portion 12. At least one reed 2 may be disposed on both opposite sides of the reed 2. Alternatively, a plurality of the increasing reed 2 may be stacked, and the plurality of increasing reed 2 may be located on the same side of the movable reed 1.

Further, as shown in fig. 1, a side surface of the movable spring 1 for abutting against the armature 3 is defined as a first movable spring surface, a side surface of the movable spring opposite to the first movable spring surface and away from the armature 3 is defined as a second movable spring surface, and the spring adding plate 2 is preferably provided on the second movable spring surface. When the number of the plurality of the spring plates 2 is increased, the plurality of spring plates 2 are preferably stacked one by one along the direction perpendicular to the second movable spring surface, so that the manufacturing process is simple, and the design difficulty is low. Alternatively, the reed 2 may be provided on the second movable spring surface. When the number of the plurality of the reed 2 is plural, the plurality of reed 2 are preferably stacked one on another in a direction perpendicular to the first movable spring surface.

As a preferable mode of this embodiment, the addition reed 2 covers at least part of the contact free portion 12. That is, the addition reed 2 is preferably provided on the side of the contact free portion 12 close to the free end of the movable reed 1, and the shape and size of the addition reed 2 are preferably adapted to the shape and size of the contact free portion 12 close to the free end of the movable reed 1, or the size and size of the addition reed 2 are smaller than the size and size of the free end of the contact free portion 12, or the size and size of the addition reed 2 may be larger than the size and size of the free end of the contact free portion 12. Here, the movable contact 51 is preferably used to rivet the movable contact 1 to the movable contact 2, or the movable contact 1 may be welded to the movable contact 2.

In addition to the above-described manner in which the contact free portion 12 is covered with the addition reed 2, as another preferable manner of this embodiment, specifically, as shown in fig. 1, the addition reed 2 extends from the side of the contact free portion 12 near the free end of the movable reed 1 to the first connecting hole 41 along the extending direction of the movable reed 1. Therefore, the two ends of the spring plate 2 act on the movable spring plate 1, so that the spring plate 2 is more firmly assembled on the movable spring plate 1, and the relay can be more stable in the use process, namely, the spring plate 2 cannot loosen due to vibration or shaking generated when the movable contact 51 is in contact with the Yu Jing contact 52 or the movable contact 51 is separated from the fixed contact 52, so that the safety performance of the relay in the use process is improved. Meanwhile, the area of the contact free part 12 of the movable contact spring 1 covered by the movable contact spring 2 is larger, and the contact pressure is further increased.

It should be noted that, as shown in fig. 2, two reinforcing holes 21 are provided on the reed 2, and each reinforcing hole 21 is provided corresponding to the first connecting hole 41, so that the reed 2 is riveted to the movable reed 1. That is, two riveting protrusions 31 are disposed on the armature 3, and each riveting protrusion 31 penetrates through the corresponding first connecting hole 41 and the corresponding reinforcing hole 21, so that the movable spring plate 1 and the reinforcing spring plate 2 can be fixed more conveniently and rapidly in the production process. Of course, not limited to two reinforcing holes 21, the number of reinforcing holes 21 may be one, three, four, five, etc., and each reinforcing hole 21 may be provided corresponding to each first connecting hole 41.

As a further preferable mode of this embodiment, specifically referring to fig. 1 and 2, the deformation portion 11 is provided with a material reduction region 6, and the material reduction region 6 extends along the length extension direction of the movable contact spring 1. The material-reducing region 6 is preferably a through groove, and is not limited to the shape of the through groove, but may be a rectangular groove, a waist groove, or the like.

Wherein, the material reduction zone 6 can be selected as one, and is positioned at the middle position of the deformation part 11. As shown in fig. 1, the number of the material reducing areas 6 may be two, and the two material reducing areas 6 are distributed relatively. Alternatively, three or more material reduction regions 6 may be arranged in an array along the width extension direction of the movable contact spring 1.

So, when the relay is in operating condition, contact free portion 12 receives the effect of magnetic force constantly to swing between upper contact and lower contact to movable reed 1's deformation portion 11 keeps frequent bending deformation, and material reduction district 6 can reduce deformation portion 11 stress in the deformation process, thereby avoids movable reed 1 in the easy problem that produces fatigue crack in deformation portion 11's position, has improved movable reed 1's life.

As a further preferable mode of this embodiment, specifically referring to fig. 2, the movable contact spring 1 further includes a fastening connection portion 13, two second connection holes 42 for connecting the yokes are provided on the fastening connection portion 13, and the fastening connection portion 13 is connected to the deformation portion 11. The connection here is preferably formed in one piece, i.e. the fastening connection 13 is formed in one piece with the deformation 11. It should be noted that the number and positions of the second connecting holes 42 may be set according to the structural design and design requirements, and the second connecting holes 42 are not limited to two second connecting holes 42, but may be one second connecting hole 42, three second connecting holes 42, four second connecting holes 42, five second connecting holes 42, and the like.

As a further preferable mode of this embodiment, as shown in fig. 3, the fastening connection portion 13 includes a pin body 131, a first epitaxial wafer 132 and a second epitaxial wafer 133, the first epitaxial wafer 132 and the second epitaxial wafer 133 are respectively located on two opposite sides of the pin body 131, a body connection hole 421 is provided on the pin body 131, an epitaxial connection hole 422 is provided on the first epitaxial wafer 132, and both the first epitaxial wafer 132 and the second epitaxial wafer 133 can be folded to the pin body 131, so that the body connection hole 421 and the epitaxial connection hole 422 are mutually interconnected to form a second connection hole 42.

So, when the yoke is connected by using the second connecting hole 42, the pin main body piece 131 and the first extension piece 132 are fastened at the same time, so that the integral structural strength of the fastening connection part 13 is ensured, the problem that gaps exist between the first extension piece 132 and the pin main body piece 131 after folding due to elasticity of materials is avoided, and the pin main body piece 131, the first extension piece 132 and the second extension piece 133 are bent and formed into the fastening connection part 13 with a three-lamination structure around crease lines, so that the area of the pin part of the movable reed 1 is increased, and the current load capacity and the heat dissipation capacity of the movable reed 1 are improved.

Based on the above-mentioned movable spring piece that increases contact pressure, the inventor still discloses a relay, includes:

the movable spring piece for increasing the contact pressure;

the magnetic circuit system is provided with an armature 3, a yoke and an iron core wound with a coil, the armature 3 of the magnetic circuit system is connected with a contact free part 12 of the movable spring piece, the yoke of the magnetic circuit system is connected with a fastening connection part 13 of the movable spring piece, the yoke is rotationally connected with the armature 3, and the iron core magnetically attracts the armature 3 when the coil is in an electrified state so as to enable the armature 3 to deflect towards the iron core.

Specifically, the relay further has a stationary contact 52, and the stationary contact 52 and the movable contact 51 of the movable spring member constitute a contact system of the relay. In this way, when the coil is in the electrified state, the magnetic circuit system generates a magnetic field, the armature 3 is attracted towards the direction of the iron core under the action of the magnetic field, so that the movable reed 1 and the increasing reed 2 of the movable reed piece are driven to deflect towards the iron core until the fixed contact 52 of the contact system is contacted with the movable contact 51 in an abutting mode, and under the action of the increasing reed 2 in the movable reed piece, the contact pressure of the movable contact 51 and the fixed contact 52 of the contact system, which are contacted and closed, is obviously increased, so that the contact stability between the movable contact 51 and the fixed contact 52 of the contact system in the relay is ensured, and the problem of higher temperature rise caused by the increase of the contact resistance of the relay is effectively avoided.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. A movable spring member for increasing contact pressure, comprising:

a movable contact (1) having a deformation portion (11) and a contact free portion (12), wherein the contact free portion (12) is connected to the deformation portion (11), and a movable contact (51) is provided on the contact free portion (12);

and the spring adding piece (2), wherein the spring adding piece (2) is fixedly connected with the contact free part (12) of the movable spring piece (1).

2. The movable spring member for increasing contact pressure according to claim 1, wherein: the contact free portion (12) is covered by the contact increasing piece (2).

3. The movable spring member for increasing contact pressure according to claim 1, wherein: the movable contact spring (1) is provided with a first connecting hole (41), the movable contact spring (2) extends to the first connecting hole (41) along the extending direction of the movable contact spring (1) from one side, close to the free end of the movable contact spring (1), of the contact free portion (12), and the first connecting hole (41) is used for riveting the armature (3).

4. A movable spring member for increasing contact pressure as set forth in claim 3, wherein: reinforcing holes (21) are formed in the reinforcing plates (2), and the reinforcing holes (21) are arranged corresponding to the first connecting holes (41).

5. The movable spring member for increasing contact pressure according to any one of claims 1 to 4, wherein: a plurality of layers of the increasing reed (2) are arranged on the movable reed (1).

6. The movable spring member for increasing contact pressure according to any one of claims 1 to 4, wherein: the movable spring (1) is defined to be a first movable spring surface on one side surface which is used for being abutted against and contacted with the armature (3), a second movable spring surface on one side surface which is far away from the armature (3) and is opposite to the first movable spring surface, and the spring increasing piece (2) is arranged on the second movable spring surface.

7. The movable spring member for increasing contact pressure according to claim 1, wherein: the deformation part (11) is provided with a material reduction region (6), and the material reduction region (6) extends along the length extension direction of the movable reed (1).

8. The movable spring member for increasing contact pressure according to any one of claims 1 to 4, wherein: the movable reed (1) further comprises a fastening connection part (13), a second connection hole (42) for connecting the yoke is formed in the fastening connection part (13), and the fastening connection part (13) is connected with the deformation part (11).

9. The movable spring member for increasing contact pressure according to claim 8, wherein: the fastening connection part (13) comprises a pin main body sheet (131), a first epitaxial sheet (132) and a second epitaxial sheet (133), wherein a main body connection hole (421) is formed in the pin main body sheet (131), an epitaxial connection hole (422) is formed in the first epitaxial sheet (132), the first epitaxial sheet (132) and the second epitaxial sheet (133) can be folded to the pin main body sheet (131), and the main body connection hole (421) and the epitaxial connection hole (422) are communicated to form a second connection hole (42).

10. A relay, comprising:

a movable spring member for increasing contact pressure according to any one of claims 1 to 9;

the magnetic circuit system is provided with an armature (3), a yoke and an iron core wound with a coil, wherein the armature (3) of the magnetic circuit system is connected with a contact free part (12) of the movable spring piece, the yoke of the magnetic circuit system is connected with a fastening connection part (13) of the movable spring piece, the yoke is rotationally connected with the armature (3), and the iron core magnetically attracts the armature (3) in an electrified state, so that the armature (3) deflects towards the iron core.