Disclosure of Invention
The embodiment of the invention provides a relay, which is improved in structure to effectively reduce the temperature rise of the relay.
The relay of the embodiment of the invention comprises:
a base having an intermediate region, a first contact region, and a second contact region, the intermediate region being disposed between the first contact region and the second contact region, the first contact region and the second contact region being arranged at intervals along a first direction;
A pair of contact portions provided in the first contact region and the second contact region, respectively; each contact part comprises two groups of movable spring parts, each group of movable spring parts comprises a movable reed, a movable contact and a fixed contact, the movable reed is provided with a first end and a second end in the second direction, the movable contact is arranged at the first end, and the fixed contact is arranged at the second end; the two movable contacts of each contact part respectively correspond to the two stationary contacts; wherein the second direction is perpendicular to the first direction; and
And the magnetic circuit part is arranged in the middle area of the base and is used for driving the four movable reeds of the pair of contact parts to move through the push rod assembly so as to realize the closing or opening of the movable contact and the static contact.
According to some embodiments of the invention, each set of moving spring parts further comprises a moving spring lead-out piece connected with the moving spring.
According to some embodiments of the invention, four moving spring lead-out pieces of the pair of contact portions are located at four corners of the base, respectively.
According to some embodiments of the invention, in each set of the moving spring portions, the stationary contact is provided at a junction of the second end of the moving spring and the moving spring lead-out piece.
According to some embodiments of the invention, the length of the movable spring extends in the second direction.
According to some embodiments of the invention, the base comprises:
a first separator disposed between the first contact region and the intermediate region;
and a second separator disposed between the second contact region and the intermediate region.
According to some embodiments of the invention, the base further has a first moving region and a second moving region spaced apart along the second direction, the intermediate region being located between the first moving region and the second moving region;
the magnetic circuit part is respectively connected with the first push rod and the second push rod in a driving way, so that the first push rod is movably arranged in the first moving area, and the second push rod is movably arranged in the second moving area;
One end of the first push rod is connected with the first end of one of the movable reeds of the contact part in the first contact area, and the other end of the first push rod is connected with the first end of one of the movable reeds of the contact part in the second contact area;
One end of the second push rod is connected with the first end of the movable reed of the other contact part in the first contact area, and the other end of the second push rod is connected with the first end of the movable reed of the other contact part in the second contact area.
According to some embodiments of the invention, the magnetic circuit portion includes a coil assembly and an armature assembly, the armature assembly being swingably connected to the base under magnetic force of the coil assembly;
The armature assembly is respectively connected to the first push rod and the second push rod and is used for driving the first push rod and the second push rod to reciprocate along the first direction.
According to some embodiments of the invention, the first pushrod is moved in the opposite direction to the second pushrod.
According to some embodiments of the invention, the first contact area, the first moving area, the second contact area and the second moving area are sequentially communicated end to form a square structure.
According to some embodiments of the invention, in the pair of contact portions, four sets of the movable contact and the stationary contact are located at four corners of a square-shaped structure, respectively.
According to some embodiments of the invention, each set of the movable spring parts further comprises a movable spring leading-out piece, the movable spring leading-out piece is connected with the movable spring, and the stationary contact is arranged on the movable spring and/or the movable spring leading-out piece;
Four movable spring leading-out pieces in the pair of contact parts are respectively positioned at four corners of the square structure.
According to some embodiments of the invention, the base further comprises:
a third partition plate disposed between the first moving region and the intermediate region;
and a fourth partition plate disposed between the second moving region and the intermediate region.
According to some embodiments of the invention, the movable reed comprises a plurality of stacked sub-reeds.
According to some embodiments of the invention, two of the movable reeds in the contact portion are parallel to each other, and each of the movable reeds has an inner surface facing each other.
According to some embodiments of the invention, the length direction of the movable spring is parallel to the second direction;
the opposite ends of the movable reed in the length direction are respectively provided with the first end and the second end.
One embodiment of the above invention has at least the following advantages or benefits:
In the relay according to the embodiment of the invention, the two contact portions are arranged at intervals in the first direction, and in each contact portion, the two sets of the movable contact and the stationary contact are arranged at intervals in the second direction. The two contact portions are located in the first contact region and the second contact region of the base, respectively, and are separated by the magnetic path portion located in the middle region of the base, as a whole, so that the influence of heat radiation generated by one of the contact portions on the other contact portion is effectively reduced. And then the contact parts are seen independently, two groups of movable contacts and stationary contacts in each contact part are arranged at intervals along the second direction, and because the movable contacts are arranged at the first ends of the movable springs and the stationary contacts are arranged at the second ends of the movable springs, the distance between the two groups of movable contacts and the stationary contacts in each contact part is pulled to the maximum extent in the second direction, and the influence of heat radiation generated by one group of movable contacts and stationary contacts on the other group of movable contacts and stationary contacts is reduced. In the comprehensive view, through the structural design that two contact portions are arranged at intervals in the first direction, and two groups of movable contacts and stationary contacts in each contact portion are arranged in the second direction, the temperature rise of the whole relay is effectively reduced, and the working reliability and the service life of the relay are improved.
In addition, since the two movable reeds in each contact portion are parallel to each other and have inner surfaces facing each other, respectively, a short-circuit resistance function is achieved. Therefore, in the embodiment of the invention, the current directions of the movable spring leading-out sheet and the movable spring sheet are not required to be opposite, i.e. the movable spring leading-out sheet does not participate in the function of resisting the electric repulsive force between the contacts. Therefore, the four movable spring leading-out pieces can be arranged at the four corners of the base, and the distance between the four movable spring leading-out pieces is increased, so that the mutual influence of heat radiation generated by the four movable spring leading-out pieces is avoided, and the effect of reducing the temperature rise is further achieved. Simultaneously, four movable spring leading-out sheets can be directly led out from four corners of the base, bending treatment is not needed, the materials of the movable spring leading-out sheets are saved, and the material cost is reduced.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
As shown in fig. 1 to 3, the relay of the embodiment of the present invention includes a base 10, a pair of contact portions 20, a magnetic circuit portion 30, and a push rod assembly 40. A pair of contact portions 20 and a magnetic circuit portion 30 are provided on the base 10, and the magnetic circuit portion 30 drives contacts of the pair of contact portions 20 to be closed or opened by a push rod assembly 40.
It will be understood that the terms "comprising," "including," and "having," and any variations thereof, are intended to cover non-exclusive inclusions in the embodiments of the invention. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.
The base 10 may include a bottom plate 101 and a side wall 102, the side wall 102 being connected to a periphery of the bottom plate 101, and the side wall 102 and the bottom plate 101 enclosing a chamber for accommodating the pair of contact portions 20, the magnetic circuit portion 30, and the push rod assembly 40.
In one embodiment, the base 10 may have a substantially square shape, but is not limited thereto.
The inside of the base 10 has a middle region 110, a first contact region 120 and a second contact region 130, the middle region 110 being disposed between the first contact region 120 and the second contact region 130, the first contact region 120 and the second contact region 130 being spaced apart along the first direction D1.
A pair of contact portions 20 are provided in the first contact region 120 and the second contact region 130, respectively. That is, the two contact portions 20 are arranged on the base 10 at intervals in the first direction D1.
Each contact portion 20 includes two sets of movable spring portions 20a, and each set of movable spring portions 20a includes a movable reed 210, a movable contact 220, and a stationary contact 230. The movable contact spring 210 has a first end 210a and a second end 210b in the second direction D2, the movable contact 220 is disposed at the first end 210a, and the stationary contact 230 is disposed at the second end 210b. The two movable contacts 220 of each contact portion 20 correspond to the two stationary contacts 230, respectively. Wherein the second direction D2 is perpendicular to the first direction D1.
The length direction of the movable contact 210 is parallel to the second direction D2. Opposite ends of the movable contact spring 210 in the length direction are provided with a first end 210a and a second end 210b, respectively. In this way, the distance between the movable contact 220 and the stationary contact 230 can be pulled as far as possible, so that the influence of heat radiation generated by one set of the movable contact 220 and the stationary contact 230 on the other set of the movable contact 220 and the stationary contact 230 is avoided, and the temperature rise of the contact portion 20 is effectively reduced.
The magnetic circuit portion 30 is provided in the middle region 110 of the base 10 for driving the four movable reeds 210 of the pair of contact portions 20 to move by the push rod assembly 40, thereby achieving the closing or opening of the movable contact 220 and the stationary contact 230.
It will be appreciated that the relay of the present embodiment includes a pair of contact portions 20, each contact portion 20 being capable of controlling one circuit, and then the relay of the present embodiment is capable of controlling at least two circuits. The two contact portions 20 are arranged on the base 10 at intervals in the first direction D1.
Each contact portion 20 includes two sets of movable spring portions 20a, each movable spring portion 20a has a substantially identical structural design, and the two sets of movable spring portions 20a are substantially parallel to each other and each include a movable spring 210, a movable contact 220, and a stationary contact 230.
Further, the two movable reeds 210 in each contact portion 20 are parallel to each other, and the two movable reeds 210 have inner surfaces 212 facing each other, respectively. The contact portions 20, when closed, form a parallel loop. The current directions of the two movable contact springs 210 are the same, the opposite inner surfaces 212 of the contact portion 20 are magnetically attracted to each other in the case of a short circuit, and the magnetically attracted inner surfaces 212 are capable of resisting an electromotive repulsive force in the case of a short circuit to maintain the movable contact 220 and the stationary contact 230 in a closed state.
The two sets of moving spring portions 20a are oppositely disposed in the second direction D2. Specifically, as shown in fig. 1 and 3, the contact portion 20 located in the first contact region 120 is exemplified. The two movable springs 210 in the two sets of movable spring parts 20a are substantially parallel, and the first end 210a of one movable spring 210 corresponds to the position of the second end 210b of the other movable spring 210, and the second end 210b of one movable spring 210 corresponds to the position of the first end 210a of the other movable spring 210. Since the movable contact 220 is disposed at the first end 210a of the movable contact 210, the stationary contact 230 is disposed at the second end 210b of the movable contact 210. Accordingly, the movable contacts 220 in one set of movable spring portions 20a correspond to the stationary contacts 230 in the other set of movable spring portions 20a, and the stationary contacts 230 in one set of movable spring portions 20a correspond to the movable contacts 220 in the other set of movable spring portions 20 a. Therefore, when the magnetic circuit portion 30 drives the movable contact spring 210 to move through the push rod assembly 40, the two pairs of movable contacts 220 and the stationary contact 230 of the one group of movable spring portions 20a are brought into contact to form a parallel circuit structure.
It will be appreciated that during relay operation, the movable reed 210 is both the operating member and the carrier fluid, and thus the movable reed 210 is the member of the relay that is susceptible to temperature rise.
In the relay of the embodiment of the present invention, two contact portions 20 are arranged at intervals in the first direction D1, and in each contact portion 20, two sets of the movable contact 220 and the stationary contact 230 are arranged at intervals in the second direction D2. As a whole, the two contact portions 20 are located in the first contact region 120 and the second contact region 130 of the base 10, respectively, and are separated by the magnetic circuit portion 30 located in the intermediate region 110 of the base 10, and therefore, the influence of the heat radiation generated by one of the contact portions 20 on the other contact portion 20 is effectively reduced. Looking at the contact portions 20 separately, the two sets of movable contacts 220 and stationary contacts 230 in each contact portion 20 are arranged at intervals along the second direction D2, and since the movable contacts 220 are disposed at the first end 210a of the movable contact spring 210 and the stationary contacts 230 are disposed at the second end 210b of the movable contact spring 210, the distances between the two sets of movable contacts 220 and stationary contacts 230 in each contact portion 20 are also pulled apart as far as possible to the maximum in the second direction D2, so that the influence of the heat radiation generated by one set of movable contacts 220 and stationary contacts 230 on the other set of movable contacts 220 and stationary contacts 230 is reduced. In a combined view, through the structural design that the two contact portions 20 are arranged at intervals in the first direction D1, and the two groups of movable contacts 220 and the stationary contacts 230 in each contact portion 20 are arranged in the second direction D2, the temperature rise of the whole relay is effectively reduced, and the working reliability and the service life of the relay are improved.
With continued reference to fig. 1-3, each set of movable spring portions 20a further includes a movable spring tab 240, the movable spring tab 240 being connected to the movable spring 210. In each set of movable spring portions 20a, a stationary contact 230 is provided at the junction of the second end 210b of the movable spring 210 and the movable spring lead 240.
The length of the movable contact spring 210 extends in the second direction D2 such that the first end 210a and the second end 210b of the movable contact spring 210 are disposed opposite to each other in the length direction of the movable contact spring 210, and thus the distance between the movable contact 220 and the stationary contact 230 disposed on the movable contact spring 210 can be as large as possible, reducing the influence of heat radiation between the two sets of movable contact 220 and stationary contact 230.
As shown in fig. 1, four moving spring lead-out pieces 240 in the pair of contact portions 20 are located at four corners of the base 10, respectively. In this way, the distance between the four movable spring leading-out pieces 240 can be pulled to the maximum as far as possible, so that the problem of higher temperature rise caused by the centralized arrangement of the four movable spring leading-out pieces 240 is avoided. Meanwhile, the four movable spring leading-out pieces 240 can be directly led out from the four corners of the base 10 without bending treatment, so that the materials of the movable spring leading-out pieces 240 are saved, and the material cost is reduced.
It should be noted that, since the two movable springs 210 in each contact portion 20 are parallel to each other, and the two movable springs 210 have inner surfaces 212 facing each other, respectively, a short circuit prevention function is realized. Therefore, in the embodiment of the present invention, the current directions of the movable spring tab 240 and the movable spring 210 do not need to be opposite, i.e. the movable spring tab 240 does not participate in the function of resisting the electric repulsive force between the contacts. In this way, the four moving spring leading-out pieces 240 can be arranged at the four corners of the base 10, and the distance between the four moving spring leading-out pieces 240 is increased, so that the effect of reducing the temperature rise is achieved.
With continued reference to fig. 1 and 2, the base 10 includes a first spacer 161 and a second spacer 162, the first spacer 161 being connected to the bottom plate 101 and disposed between the first contact region 120 and the intermediate region 110. The second spacer 162 is connected to the bottom plate 101 and is disposed between the second contact region 130 and the intermediate region 110. By the design of the first spacer 161 and the second spacer 162 such that the first spacer 161 separates one of the contact portions 20 from the magnetic circuit portion 30 and the second spacer 162 separates the other of the contact portions 20 from the magnetic circuit portion 30, the heat radiation generated by one of the contact portions 20 is blocked by the first spacer 161 and the heat radiation generated by the other of the contact portions 20 is blocked by the second spacer 162, and the heat radiation generated by the two contact portions 20 is prevented from affecting each other.
With continued reference to fig. 1 and 2, the base 10 further has a first moving area 140 and a second moving area 150 spaced apart along the second direction D2, and the middle area 110 is located between the first moving area 140 and the second moving area 150.
The push rod assembly 40 includes a first push rod 410 and a second push rod 420, and the magnetic circuit portion 30 is drivingly connected to the first push rod 410 and the second push rod 420, respectively, such that the first push rod 410 is movably disposed in the first movement region 140, and the second push rod 420 is movably disposed in the second movement region 150.
As shown in fig. 3, one end of the first push rod 410 is connected to the first end 210a of one of the movable springs 210 of the contact portion 20 provided in the first contact region 120, and the other end of the first push rod 410 is connected to the first end 210a of one of the movable springs 210 of the contact portion 20 provided in the second contact region 130. One end of the second push rod 420 is connected to the first end 210a of the other movable contact spring 210 of the contact portion 20 provided in the first contact region 120, and the other end of the second push rod 420 is connected to the first end 210a of the other movable contact spring 210 of the contact portion 20 provided in the second contact region 130.
In the present embodiment, the push rod assembly 40 adopts a dual push rod structure of the first push rod 410 and the second push rod 420, and the contact is closed or opened by pushing and pulling of the dual push rod structure.
Specifically, the movement directions of the first push rod 410 and the second push rod 420 are opposite, and if the first push rod 410 moves downward, the second push rod 420 moves upward. As the first push rod 410 moves downward, both the movable reeds 210 connected to the first push rod 410 swing downward around the respective second ends 210 b. As the second push rod 420 moves upward, both the movable reeds 210 connected to the second push rod 420 swing upward around the respective second ends 210 b. In one contact portion 20, the swing directions of the two movable reeds 210 are opposite and away from each other, and the disconnection of the movable contact 220 and the stationary contact 230 is achieved.
Conversely, if the first push rod 410 moves upward, the second push rod 420 moves downward. Both movable reeds 210 connected to the first push rod 410 swing upward around the respective second ends 210b, and both movable reeds 210 connected to the second push rod 420 swing downward around the respective second sections. In one contact portion 20, the swing directions of the two movable reeds 210 are opposite and close to each other, and the closing of the movable contact 220 and the stationary contact 230 is achieved.
The base 10 further includes a third spacer 163 and a fourth spacer 164. The third partition 163 is connected to the base plate 101 and is disposed between the first moving region 140 and the intermediate region 110. The fourth partition 164 is connected to the base plate 101 and is disposed between the second moving region 150 and the intermediate region 110.
As shown in fig. 1 and 2, the first contact region 120, the first moving region 140, the second contact region 130, and the second moving region 150 are sequentially connected end to end, forming a mouth-shaped structure. The magnetic circuit portion 30 is disposed within the mouth-shaped structure, and the two contact portions 20 are respectively located at two opposite sides of the mouth-shaped structure, and the first push rod 410 and the second push rod 420 are respectively located at the other two opposite sides of the mouth-shaped structure.
In the pair of contact portions 20, four sets of the movable contact 220 and the stationary contact 230 are located at four corners of the square-shaped structure, respectively. In this way, the four sets of movable contacts 220 and the stationary contacts 230 are respectively arranged at the four corners of the square structure, so that the distance between each set of movable contacts 220 and the stationary contacts 230 is increased, and the heat radiation influence between the two adjacent sets of movable contacts 220 and the stationary contacts 230 is effectively reduced.
As an example, the four moving spring lead-out pieces 240 of the pair of contact portions 20 are located at the four corners of the square-shaped structure, respectively.
As shown in fig. 4, the magnetic circuit portion 30 includes a coil assembly 310 and an armature assembly 320, and the armature assembly 320 is swingably coupled to the base 10 under the magnetic force of the coil assembly 310. The armature assembly 320 includes a permanent magnet 321, an armature 322, and a swing arm 323. The number of the armatures 322 is two, and the permanent magnet 321 is sandwiched between the two armatures 322. The swing arm 323 may be made of an insulating material, such as plastic, and the permanent magnet 321, the armature 322, and the swing arm 323 may be connected as a single piece by integral injection molding. Both ends of the swing arm 323 are connected to the first push rod 410 and the second push rod 420, respectively.
By changing the magnetic field direction of the coil assembly 310 to drive the armature assembly 320 to swing relative to the base 10, the swing arm 323 of the armature assembly 320 drives the first push rod 410 and the second push rod 420 to reciprocate along the first direction D1, so as to realize the opening or closing of the movable contact 220 and the stationary contact 230.
As shown in fig. 5, the movable reed 210 of the movable reed part 20a may include a plurality of stacked sub-reeds 211. In the embodiment of the present invention, the number of the sub-reeds 211 is five, but not limited to this, for example, the number of the sub-reeds 211 may be two, three, four, six or other numbers. By designing the movable reed 210 to include a plurality of stacked sub-reeds 211, on the one hand, the sub-reeds 211 are thinner, the movable reed 210 can be made of thin strip materials, the material cost is lower, and the operation is easy; on the other hand, the number of the sub-reeds 211 can be flexibly adjusted according to the magnitude of the current, so that the thickness of the movable reed 210 can be increased or decreased.
The movable contact 220 and the stationary contact 230 are provided on the movable reed 210. It is understood that the movable contact 220 may be integrally or separately connected to the movable contact 210, and the stationary contact 230 may be integrally or separately connected to the movable contact 210.
When the movable contact 220 and the stationary contact 230 are connected to the movable spring 210 in a split manner, the connection manner may be, but is not limited to, riveting.
Of course, in other embodiments, the movable spring 210 may be a single piece rather than a plurality of stacked sub-springs 211.
It will be appreciated that the various embodiments/implementations provided by the invention may be combined with one another without conflict and are not illustrated here.
In the inventive embodiments, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the embodiments of the invention will be understood by those skilled in the art according to the specific circumstances.
In the description of the embodiments of the invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the invention and to simplify the description, and do not indicate or imply that the devices or units referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the invention and is not intended to limit the embodiment of the invention, and various modifications and variations can be made to the embodiment of the invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.