CN216412970U - Contact switch assembly and switching device - Google Patents

Abstract

The utility model relates to a contact switch assembly and a switching electric appliance, wherein the contact switch assembly comprises an electromagnetic actuating mechanism, a fixed contact and a movable spring, the electromagnetic actuating mechanism comprises an action executing part with a movable stroke, the movable spring is fixed on the action executing part of the electromagnetic actuating assembly and synchronously moves with the action executing part, the movable spring comprises a free end provided with a movable contact, the movable contact on the free end of the movable spring is driven by the action executing part to be close to or far from the fixed contact so as to realize connection or disconnection, the contact switch assembly further comprises a limiting part, the limiting part is fixedly connected with the action executing part in a relative position, the limiting part and the free end of the movable spring are provided with a set limiting distance, the limiting part is used for stopping the free end of the movable spring so as to limit the bending deformation amplitude of the movable spring in the limiting distance, and the set limiting distance is ensured not to be limited while the gap between the movable contact and the fixed contact is adjusted by the action executing part A change occurs.

Description

Contact switch assembly and switching device

Technical Field

The utility model relates to the field of switch equipment, in particular to improvement of a bending limiting part of a movable spring plate.

Background

The electromagnetic part of the relay generally comprises a coil, a yoke, an armature, an iron core and the like, the contact part generally comprises a static reed provided with a static contact and a movable reed provided with a movable contact, in a common relay structure, the movable reed is fixedly connected to the armature, the free end of the movable reed extends out of the outer side of the armature to be matched with the static contact, and the armature moves under the actuation of the electromagnetic part to drive the movable contact on the free end of the movable reed to be close to or far away from the static contact, so that the relay is switched on or switched off.

One drawback of this product is that: when the free end of the movable spring is excessively bent, plastic deformation and even fatigue fracture are generated, so that elastic reset cannot be realized to cause product failure. Particularly, under the premise that the load requirement of the relay is higher and higher in recent years, the volume and the weight of the movable contact and the contact piece are larger and larger, so that the free end of the movable spring piece has larger inertia and larger swing amplitude, and when the relay is subjected to larger mechanical impact and vibration (such as the relay falls), the movable contact and the static contact cannot be reliably closed to form a current-carrying loop after the movable spring piece is subjected to plastic deformation or fatigue fracture, so that the failure is caused.

In the prior art, some methods fix a stop pin on a base or a coil frame of a relay to limit the bending amplitude of a free end of a movable contact spring, however, when the relay is applied to different load voltages, the height of a movable contact often needs to be adjusted to adjust the size of a contact gap (for example, an armature is adjusted to adjust the height of the movable contact), and under the condition that the movable contact is also adjusted to the height of the free end of the movable contact spring, the stop pin also needs to be readjusted or replaced with a new stop pin, which brings inconvenience to a user.

SUMMERY OF THE UTILITY MODEL

Therefore, in view of the above problems, the present invention provides a contact switch assembly and a switching device with optimized structure.

The utility model is realized by adopting the following technical scheme:

the utility model provides a contact type switch assembly, which comprises an electromagnetic actuating mechanism, a fixed contact and a movable reed, wherein the electromagnetic actuating mechanism comprises an action executing piece with a movable stroke, the movable reed is fixed on the action executing piece of the electromagnetic actuating assembly and synchronously moves with the action executing piece, the movable reed comprises a free end provided with a movable contact, the movable contact on the free end of the movable reed is driven by the action executing piece to be close to or far from the fixed contact so as to realize connection or disconnection, the contact type switch assembly also comprises a limiting piece, the limiting piece is fixedly connected with the action executing piece in a relative position, the limiting piece and the free end of the movable reed have a set limiting distance, the limiting piece is used for stopping the free end of the movable reed so as to limit the bending deformation amplitude of the movable reed in the limiting distance, and the set limiting distance is ensured not to occur when the gap between the movable contact and the fixed contact is adjusted by the action executing piece And changed.

Based on manufacturing considerations, in one embodiment, the electromagnetic actuating mechanism includes a coil, an iron core, and a yoke, the motion actuator is an armature having a swinging movable stroke, the movable contact is defined to be located relatively above the stationary contact, and the stationary contact is defined to be located relatively below the movable contact, the position limiting member is in a sheet structure, a first end of the position limiting member is fixedly connected to the armature, and a second end of the position limiting member extends to be above the free end, so that the second end of the position limiting member and the free end of the movable spring form the position limiting distance.

In order to form an abutting plane facing the free end to improve the stopping effect on the free end, in an embodiment, the second end of the limiting member is preferably further bent and extended downward toward the free end.

In one embodiment, it is preferable that, in view of manufacturing and assembly, a middle portion of the movable spring is fixedly connected to the armature, one end of the movable spring extends to the outside of the armature to form the free end, the other end of the movable spring crosses the armature and extends downward to form a suspension loop engaged with a yoke hook, the limiting member is in a zigzag bent sheet structure and includes the first end, the second end, and a connecting portion connecting the first end and the second end, the first end is eccentrically fixed beside the middle portion, and the connecting portion extends obliquely toward the free end, so that the second end extends to above the free end.

In one embodiment, it is preferable that, in view of manufacturing and assembly, one end of the movable spring is fixedly connected to the armature, and the other end of the movable spring extends to the outside of the armature to form the free end, and the limiting member has an L-shaped bent sheet structure including the first end, the second end, and a connecting portion connecting the first end and the second end, and defines the free end at the front end of the movable spring, wherein the first end is fixed behind the movable spring, and the connecting portion spans over the movable spring, so that the second end extends to above the free end.

In order to avoid the collision of the free end of the movable spring plate with the limiting member during the normal bending of the pull-in process, in one embodiment, the relative position between the limiting member and the free end is preferably set as: and in the process that the action executing piece drives the movable contact and the fixed contact to attract each other so as to realize connection, a gap is always kept between the limiting piece and the free end.

In one embodiment, in a preferred rest state, the limiting distance between the limiting member and the free end of the movable spring plate is set as follows: 0.5 mm-1.5 mm.

In one embodiment, the stopper is preferably made of a rigid material.

Preferably, the movable contact is integrally formed on the free end, or a contact piece is fixedly connected to the free end, and the movable contact is fixedly arranged on the contact piece.

In order to prevent the limiting member from rotating, in one embodiment, it is preferable that the limiting member is fixed to the motion actuator by riveting through at least two riveting points.

In one embodiment, preferably, the electromagnetic actuating mechanism includes a coil, a stationary core and a movable core, the stationary core attracts the movable core to move linearly through electromagnetic attraction, the motion actuator is a push rod fixedly connected to the movable core, and the limiting member is fixedly connected to the push rod.

Based on the contact switch assembly, the utility model further provides a switching apparatus, which comprises the contact switch assembly.

Wherein, in one embodiment, preferably the switching device is a relay.

The utility model has the following beneficial effects: the limit pieces are fixedly connected to the action executing piece of the electromagnetic actuating mechanism, and even if the contact clearance needs to be adjusted due to different load voltages, the relative positions of the limit pieces and the movable spring pieces cannot be changed no matter how the position of the action executing piece is adjusted to change the height of the movable contact, so that the contact type switch assembly disclosed by the utility model can be compatible with all contact clearance specifications of the same product, and the problem that different parts need to be replaced for limiting due to different contact clearances in the prior art is solved.

Drawings

Fig. 1 is a schematic perspective view of a relay in embodiment 1;

FIG. 2 is a front view of the relay of embodiment 1;

FIG. 3 is a plan view of a relay in embodiment 1;

fig. 4 is a schematic perspective view of an armature, a movable spring, and a stopper in embodiment 1;

fig. 5 is a front view of the armature, the movable spring, and the stopper in embodiment 1;

fig. 6 is a front view of the stopper in embodiment 1;

fig. 7 is a schematic perspective view of an armature, a movable spring, and a stopper in embodiment 2;

fig. 8 is a front view of an armature, a movable spring, and a stopper in embodiment 2;

fig. 9 is a front view of the stopper in embodiment 2;

FIG. 10 is a schematic diagram of a relay of embodiment 3;

fig. 11 is a schematic diagram of a relay of embodiment 4.

Detailed Description

To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The utility model will now be further described with reference to the accompanying drawings and detailed description.

Example 1:

referring to fig. 1 to 6, as a preferred embodiment of the present invention, there is provided a relay including a contact switch assembly that performs on/off of the relay, the contact switch assembly including an electromagnetic actuating mechanism, and further including a movable contact spring 2, a stopper 3, and a stationary contact 4. The electromagnetic actuating mechanism comprises a coil, an iron core, a yoke and an armature 1, wherein the armature 1 is used as an action executing piece of the electromagnetic actuating mechanism, the iron core attracts the armature 1 to swing by electrifying the coil and forming a closed magnetic circuit by means of the yoke, and the armature 1 can also swing reversely by means of an elastic piece to reset as a common electromagnetic actuating structure, so that details of the electromagnetic actuating mechanism are not repeated in the embodiment.

The fixed contact 4 is fixedly arranged, the movable spring piece 2 is fixedly connected to the armature 1, the movable spring piece 2 comprises a free end 21, a movable contact 22 is fixedly arranged on the free end 21, and when the armature 1 swings, the movable spring piece 2 is driven to swing together, so that the movable contact 22 is relatively close to or far away from the fixed contact 4, and the connection (the attraction contact between the movable contact 22 and the fixed contact 4) or the disconnection (the separation between the movable contact 22 and the fixed contact 4) of the relay is realized. The fixed connection between the movable spring 2 and the armature 1 can be realized by riveting, screwing, welding and other processes, and if riveting or screwing is adopted, the movable spring and the armature are preferably connected through at least two connection points to prevent the movable spring 2 from rotating. The moving contact 22 is fixedly disposed on the contact piece 23 in this embodiment, and the contact piece 23 is fixedly connected to the free end 21, in other embodiments, the moving contact 22 may be directly formed on the free end 21 integrally.

Locating part 3 fixed connection is on armature 1, locating part 3 has the spacing interval W of settlement with the free end 21 of movable contact spring 2, locating part 3 is in spacing interval W through backstop free end 21 with the range of limiting free end 21 towards keeping away from 4 direction bending deformation of stationary contact, thereby limit the bending of movable contact spring 2 free end 21 in elastic deformation's within range, avoid movable contact spring 2 to take place plastic deformation, fatigue fracture scheduling problem, guarantee that movable contact spring 2 free end 21 still can recover normal operating position when the relay deactivates or receives great exogenic action, the reliability and the stability of relay have been improved. Moreover, because the limiting part 3 and the movable spring piece 2 are both fixedly connected to the armature 1, even if the contact gap needs to be adjusted due to different load voltages, the height of the movable contact 22 is changed by adjusting the position of the armature 1, and the limiting distance W between the limiting part 3 and the movable spring piece 2 does not change, so that the contact switch assembly in the embodiment can be compatible with all contact gap specifications of the same product, and the problem that different parts need to be replaced for limiting due to different contact gaps in the prior art is solved.

For convenience of description, it is defined that the movable contact 21 is relatively above the fixed contact 22, and the fixed contact 22 is relatively below the movable contact 21. Specifically, in the present embodiment, the limiting member 3 is a sheet-shaped structure and includes a first end 32, a second end 31 and a connecting portion 33 connecting the first end 32 and the second end 31, wherein the first end 32 is fixedly connected to the armature 1, and the second end 31 extends above the free end 21 to stop the free end 21. The limiting member 3 having a sheet structure has an advantage of being easily processed by a sheet metal process, and in other embodiments, the limiting member 3 may have other shapes such as a rod shape, a block shape, and the like, as long as the limiting member 3 is fixedly connected to the armature 1 and can play a role of limiting the bending of the free end 21 of the movable spring 2.

As shown in fig. 2, the second end 31 of the limiting member 3 is further bent and extended downward toward the free end 21, so as to form an abutment plane toward the free end 21, thereby improving the stopping effect on the free end 21.

Referring to fig. 3-4, the middle part of the movable spring 2 is fixedly connected to the armature 1, one end of the movable spring 2 extends to the outside of the armature 1 to form a free end 21, the other end passes over the armature 1 and extends downwards to form a hanging ring 24, the hanging ring 24 is lapped on a hook of a yoke, and the electric parameters of the product are adjusted to be in a proper range by adjusting the tension degree of the hook. The limiting member 3 is a Z-shaped bent sheet structure, the first end 32 is fixed to a side of the middle portion of the movable spring 2 in a deviating manner, and the connecting portion 33 extends obliquely toward the free end 21, so that the second end 31 extends to above the free end 21 to stop the free end 21.

In the relay attracting process, the free end 21 can be elastically bent normally, in order to avoid the collision of the free end 21 with the limiting part 3 in the normal bending process, the relative position of the limiting part 3 and the free end 21 is set as: in the suction process of the contact type switch assembly, a gap is always kept between the limiting part 3 and the free end 21. Referring to fig. 2, in the present embodiment, in the static state, the limiting gap W between the limiting member 3 and the free end 21 takes the following value: 0.5 mm-1.5 mm, so that the contact switch component can not only meet the requirement that the free end 21 can not bend and collide with the limiting part 3 in the normal suction process, but also limit the bending amplitude of the free end 21 by the limiting part 3 when the relay is impacted by abnormal external force.

As a preferred embodiment, the limiting member 3 may be made of a rigid material with high rigidity, such as stainless steel or aluminum alloy, so as to ensure the structural rigidity of the limiting member 3 and improve the reliability.

The fixed connection of the limiting part 3 and the armature 1 can be realized by riveting, screwing, welding and other processes, and the limiting part 3 is riveted and fixed on the armature 1 in the embodiment and is riveted and fixed through two riveting points to prevent the limiting part 3 from rotating.

The contact switch assembly provided by the present embodiment may be applied to other switching appliances, such as a contactor, in addition to a relay.

Example 2:

this embodiment provides a relay, which has a similar structure to the relay in embodiment 1, and includes a contact switch assembly, except for the structure of the movable spring and the position limiting member in this embodiment.

Referring to fig. 7-9, the contact switch assembly of the relay in this embodiment includes an armature 1 ', a movable spring 2', and a position-limiting member 3 ', wherein one end of the movable spring 2' is fixedly connected to the armature 1 ', and the other end extends to the outside of the armature 1' to form a free end 21 ', and a movable contact is integrally formed on the free end 21'. The limiting member 3 'is in an L-shaped bent sheet structure, the limiting member 3' is fixedly connected to the armature 1 ', and includes a first end 32', a second end 31 ', and a connecting portion 33' connecting the first end 32 'and the second end 31', for convenience of description, the free end 21 'is defined to be located at the front end of the movable spring piece 2', wherein the first end 32 'is fixed on the surface of the armature 1' behind the movable spring piece 2 ', and the connecting portion 33' spans over the movable spring piece 2 ', so that the second end 31' extends to the upper side of the free end 21 'to form a stop for the free end 21'.

The present example is an adaptive structural change to the limiting member based on different movable spring structures, which explains that the structure of the limiting member may be various, and any limiting member structure that can be fixedly connected to the armature and produce a stopping effect on the free end of the movable spring is a feasible solution.

Example 3:

referring to fig. 10, the present embodiment provides a relay, including an armature 1A, where the armature 1A is in a see-saw structure, a movable spring 2A is fixedly connected to the armature 1A, and the armature 1A swings to drive the movable spring 2A to cooperate with a fixed stationary contact 4A to implement load switching of the relay. The relay further comprises a limiting part 3A fixedly connected to the armature 1A, the limiting part 3A limits the bending deformation amplitude of the free end towards the direction away from the fixed contact 4A through the free end of the stop movable spring piece 2A, so that the bending of the free end of the movable spring piece 2A is limited in the range of elastic deformation, and the problems of plastic deformation, fatigue fracture and the like of the movable spring piece 2A are avoided.

That is, in addition to the one-side snap-type relays shown in embodiments 1 and 2, the stopper structure can be applied to the two-side seesaw-type relay shown in this embodiment.

Example 4:

referring to fig. 11, the present embodiment provides a relay, which includes a coil, a stationary core and a movable core 1B, a push rod 1B01 (as an actuating member of an electromagnetic actuating mechanism) is fixedly connected to the movable core 1B, a movable contact 2B is fixedly connected to the push rod 1B01, and the movable core 1B moves linearly under the attraction of the stationary core, so that the movable contact 2B on the push rod 1B01 is synchronously contacted with or separated from two stationary contacts 4B, thereby implementing the on/off of the relay. The relay further comprises a limiting piece 3B fixedly connected to the push rod 1B01, the limiting piece 3B limits the bending deformation amplitude of the free end towards the direction far away from the static contact 4B through the free end of the stop movable spring piece 2B, so that the bending of the free end of the movable spring piece 2B is limited in the range of elastic deformation, and the problems of plastic deformation, fatigue fracture and the like of the movable spring piece 2B are avoided.

That is, the present invention can be applied to a relay of the actuator direct-acting type of the present embodiment, in addition to the oscillating type relays shown in embodiments 1 to 3.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (13)

1. The contact type switch component comprises an electromagnetic actuating mechanism, a fixed contact and a movable reed, wherein the electromagnetic actuating mechanism comprises an action executing piece with a movable stroke, the movable reed is fixed on the action executing piece of the electromagnetic actuating component and moves synchronously with the action executing piece, the movable reed comprises a free end provided with a movable contact, and the movable contact on the free end of the movable reed is driven by the action executing piece to be close to or far away from the fixed contact so as to realize connection or disconnection, and the contact type switch component is characterized in that: the limiting piece is fixedly connected with the action executing piece in a relative position, the limiting piece and the free end of the movable spring piece are provided with a set limiting distance, the limiting piece is used for stopping the free end of the movable spring piece so as to limit the bending deformation amplitude of the movable spring piece within the limiting distance, and the set limiting distance is ensured not to change while the size of a gap between the movable contact and the fixed contact is adjusted by the action executing piece.

2. The touch switch assembly of claim 1, wherein: the electromagnetic actuating mechanism comprises a coil, an iron core and a yoke, the action executing piece is an armature with a swing type movable stroke, the movable contact is defined to be relatively positioned above the fixed contact, the fixed contact is relatively positioned below the movable contact, the limiting piece is of a sheet structure, the first end of the limiting piece is fixedly connected to the armature, and the second end of the limiting piece extends to the upper side of the free end, so that the second end of the limiting piece and the free end of the movable spring piece form the limiting distance.

3. The touch switch assembly of claim 2, wherein: the second end of the limiting piece is bent and extended downwards towards the free end.

4. The touch switch assembly of claim 2, wherein: the middle part fixed connection of movable spring is in on the armature, movable spring one end to the armature outside extends in order to form the free end, the other end is crossed armature and downwardly extending is in order to form and be connected the complex link with the yoke hook, the locating part is "Z" style of calligraphy lamellar structure of bending, include first end the second end and connection the connecting portion of first end and second end, first end is fixed off-centre the one side of middle part, connecting portion court the free end slant extends, so that the second end extends to the free end top.

5. The touch switch assembly of claim 2, wherein: movable spring one end fixed connection be in on the armature, the other end to the armature outside extends in order to form the free end, the locating part is "L" style of calligraphy sheet structure of bending, include the first end the second end and connect the connecting portion of first end and second end define the free end is in the front end of movable spring, wherein the first end is fixed the rear of movable spring, connecting portion span the movable spring top, so that the second end extends to the free end top.

6. The touch switch assembly of claim 1, wherein: the relative position of the limiting piece and the free end is set as follows: and in the process that the action executing piece drives the movable contact and the fixed contact to attract each other so as to realize connection, a gap is always kept between the limiting piece and the free end.

7. The touch switch assembly of claim 6, wherein: in a static state, the limiting distance between the limiting part and the free end of the movable spring piece is set as follows: 0.5 mm-1.5 mm.

8. The touch switch assembly of claim 1, wherein: the limiting piece is made of rigid materials.

9. The touch switch assembly of claim 1, wherein: the movable contact is integrally formed on the free end, or the free end is fixedly connected with a contact piece, and the movable contact is fixedly arranged on the contact piece.

10. The touch switch assembly of claim 1, wherein: the limiting part is riveted and fixed on the action executing part through at least two riveting points.

11. The touch switch assembly of claim 1, wherein: the electromagnetic actuating mechanism comprises a coil, a static iron core and a movable iron core, the static iron core attracts the movable iron core to move linearly through electromagnetic attraction, the action executing piece is a push rod fixedly connected with the movable iron core, and the limiting piece is fixedly connected with the push rod.

12. Switching device, its characterized in that: comprising the touch switch assembly of any of claims 1-11.

13. The switching device according to claim 12, characterized in that: the switching device is a relay.

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