CN216412970U - Contact switch assembly and switchgear - 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 switchgear

technical field

The utility model relates to the field of switchgear, in particular to the improvement of a bending limiter of a movable spring.

Background technique

The electromagnetic part of the relay usually includes a coil, a yoke, an armature and an iron core, etc. The contact part usually includes a static reed with a static contact and a moving reed with a moving contact. In a common relay structure, The moving reed is fixedly connected to the armature, the free end of the moving reed protrudes out of the armature to cooperate with the static contact, the armature moves under the actuation of the electromagnetic part, and drives the moving contact and the static contact on the free end of the moving reed close or far away, so as to realize the on or off of the relay.

One defect of this product is that when the free end of the moving reed is excessively bent, it will produce plastic deformation or even fatigue fracture, so that elastic reset cannot be achieved and the product will fail. Especially in recent years, under the premise that the load requirements of relays are getting higher and higher, the volume and weight of the moving contacts and contact pieces are getting bigger and bigger, which leads to the large inertia of the free end of the moving reed and the larger swing range. When there is a large mechanical shock and vibration (such as a drop of the relay), after the plastic deformation or fatigue fracture of the moving reed, the moving and static contacts cannot be reliably closed to form a current-carrying circuit, resulting in failure.

In the prior art, some use a stopper foot fixed on the base or wire frame of the relay to limit the bending amplitude of the free end of the movable reed. However, when the relay is applied to different load voltages, the height of the movable contact is often It needs to be adjusted to adjust the size of the contact gap (such as adjusting the armature to adjust the height of the moving contact). In the case of adjusting the height of the moving contact, that is, the free end of the moving reed, the stop foot also needs to be repositioned or replaced with a new one. the stop foot, which brings a lot of inconvenience to the user.

Utility model content

Therefore, in view of the above problems, the present invention proposes a contact switch assembly and a switch appliance with an optimized structure.

The utility model adopts the following technical scheme to realize:

The utility model proposes a contact switch assembly, which includes an electromagnetic actuating mechanism, a static contact and a moving reed, the electromagnetic actuating mechanism includes an action executing member with an active stroke, and the moving reed is fixed on the electromagnetic actuating plate. The action actuator of the assembly moves synchronously with it, the movable reed includes a free end with a movable contact, and the action actuator drives the movable contact on the free end of the movable reed to approach or away from the static contact to realize connection or disconnection, and also includes a limit piece, the limit piece is fixedly connected with the action execution piece in a relative position, and the limit piece is connected with the moving spring The free end of the sheet has a set limit distance, and the limit piece is used to stop the free end of the movable spring to limit the amplitude of its bending deformation within the limit distance. The component adjusts the size of the gap between the movable contact and the stationary contact, and also ensures that the set limit distance does not change.

Wherein, based on the consideration of manufacturing process, in one embodiment, the electromagnetic actuating mechanism includes a coil, an iron core, and a yoke, and the action executing member is an armature with a swinging movable stroke, and it is defined that the movable contact is relative to each other. Above the static contact, the static contact is relatively below the moving contact, the limiting member is in a sheet-like structure, and the first end of the limiting member is fixedly connected to the armature , the second end extends above the free end, so that the second end of the limiting member and the free end of the movable spring plate form the limiting distance.

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

Wherein, based on the consideration of manufacturing and assembly, in one embodiment, preferably, the middle part of the movable reed is fixedly connected to the armature, and one end of the movable reed extends to the outside of the armature to form the free end, The other end goes over the armature and extends downward to form a hanging ring that is hooked and matched with the yoke. Two ends and a connecting part connecting the first end and the second end, the first end is fixed to one side of the middle part in a deviated manner, and the connecting part extends obliquely toward the free end, so that the first end The two ends extend above the free end.

Wherein, based on the consideration of manufacturing and assembly, in one embodiment, preferably one end of the movable spring is fixedly connected to the armature, and the other end extends to the outside of the armature to form the free end, and the limiting member is in the form of a The "L"-shaped bent sheet structure includes the first end, the second end and a connecting part connecting the first end and the second end, and defines that the free end is located at the front end of the movable spring , wherein the first end is fixed behind the movable spring, and the connecting portion spans above the movable spring, so that the second end extends above the free end.

Wherein, in order to prevent the free end of the movable spring from colliding with the limiting member during the normal bending of the pull-in process, in one embodiment, preferably, the relative position of the limiting member and the free end is set as: During the process that the moving contact and the stationary contact are driven by the action executing element to be pulled together to realize connection, the limiting element and the free end always maintain a gap.

Wherein, in one embodiment, preferably in a static state, the limit distance between the limit member and the free end of the movable spring is set to be between 0.5 mm and 1.5 mm.

Wherein, in one embodiment, preferably, the limiting member is made of rigid material.

Wherein, preferably, 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.

Wherein, in order to prevent the limiting member from rotating, in one embodiment, preferably, the limiting member is riveted and fixed on the action executing member through at least two riveting points.

Wherein, in one embodiment, preferably, the electromagnetic actuating mechanism includes a coil, a static iron core and a moving iron core, the static iron core attracts the moving iron core to move linearly through electromagnetic attraction, and the action executing member is a The movable iron core is fixedly connected to the push rod, and the limiting member is fixedly connected to the push rod.

Based on the above-mentioned contact switch assembly, the present invention further provides a switch electrical appliance, which includes the above-mentioned contact switch assembly.

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

The utility model has the following beneficial effects: the limiters in the present utility model are all fixedly connected to the actuating element of the electromagnetic actuating mechanism, even if the contact gap needs to be adjusted due to the difference of the load voltage, no matter what Adjust the position of the action actuator to change the height of the movable contact, the relative position of the limiter and the movable reed will not change, so the contact switch assembly of the present invention can be compatible with all contact gap specifications of the same product , to avoid the problem in the prior art that different parts need to be replaced to limit the position due to different contact gaps.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the relay in embodiment 1;

Fig. 2 is the front view of the relay in embodiment 1;

Fig. 3 is the top view of the relay in embodiment 1;

4 is a perspective view of the armature, the movable spring and the limiter in Embodiment 1;

5 is a front view of the armature, the movable spring and the limiter in Embodiment 1;

Fig. 6 is the front view of the limiter in embodiment 1;

7 is a perspective view of the armature, the movable spring and the limiter in Embodiment 2;

8 is a front view of the armature, the movable spring and the limiter in Embodiment 2;

Fig. 9 is the front view of the limiter in embodiment 2;

10 is a schematic diagram of a relay in Embodiment 3;

11 is a schematic diagram of a relay in Embodiment 4. FIG.

Detailed ways

To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiments, and can be combined with the relevant description of the specification to explain the operation principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible embodiments and the advantages of the present invention. Components in the figures are not drawn to scale, and similar component symbols are often used to represent similar components.

The present utility model will now be further described with reference to the accompanying drawings and specific embodiments.

Example 1:

Referring to FIGS. 1-6 , as a preferred embodiment of the present invention, a relay is provided, the relay includes a contact switch assembly for turning it on or off, the contact switch assembly includes an electromagnetic actuating mechanism, and also includes The moving reed 2, the limiter 3 and the static contact 4. The electromagnetic actuating mechanism includes a coil, an iron core, a yoke and an armature 1. The armature 1 is used as the action element of the electromagnetic actuating mechanism. By energizing the coil and forming a closed magnetic circuit with the help of the yoke, the iron core attracts the armature 1 to swing, and the armature 1 It can also be reset by reverse swinging of the elastic member. As a common electromagnetic actuation structure, the details of this example will not be repeated.

The static contact 4 is fixedly arranged, the movable reed 2 is fixedly connected to the armature 1, and the movable reed 2 includes a free end 21, and a movable contact 22 is fixed on the free end 21. When the armature 1 swings, it drives the moving The reed 2 swings together, so that the movable contact 22 is relatively close to or away from the stationary contact 4, so as to realize the connection of the relay (the movable contact 22 and the stationary contact 4 are in contact with each other) or disconnected (the movable contact 22 and the stationary contact 4 are in contact with each other). Contact 4 is separated). The fixed connection between the movable reed 2 and the armature 1 can be realized by riveting, screwing, welding and other processes. If riveting or screwing is used, it is preferably connected through at least two connection points to prevent the movable reed 2 from rotating. In this embodiment, the movable contact 22 is fixedly arranged on the contact piece 23, and the contact piece 23 is fixedly connected to the free end 21. In other embodiments, the movable contact 22 can also be directly integrally formed on the free end 21. superior.

The limiter 3 is fixedly connected to the armature 1, and the limiter 3 and the free end 21 of the movable spring 2 have a set limit distance W, and the limiter 3 passes through the free end 21 of the stop within the limit distance W. Limit the extent of the bending deformation of the free end 21 in the direction away from the static contact 4, thereby limiting the bending of the free end 21 of the movable reed 2 within the range of elastic deformation, avoiding the problems of plastic deformation and fatigue fracture of the movable reed 2, ensuring that The free end 21 of the moving reed 2 can still be restored to the normal working position when the relay is de-energized or subjected to a large external force, which improves the reliability and stability of the relay. Moreover, since the limiter 3 and the movable reed 2 are fixedly connected to the armature 1, even if the contact gap needs to be adjusted due to different load voltages, the position of the armature 1 is adjusted anyway to change the position of the movable contact 22. The height, the limit distance W between the limiter 3 and the moving reed 2 will not change, so the contact switch assembly in this embodiment can be compatible with all the contact gap specifications of the same product, avoiding the There is a problem in the technology that due to different contact gaps, different parts need to be replaced to limit the position.

For ease of description, it is defined that the movable contact 21 is relatively above the stationary contact 22 , and the stationary contact 22 is relatively positioned below the movable contact 21 . Specifically in this embodiment, the limiting member 3 has a sheet-like structure, including 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 On the armature 1 , the second end 31 extends above the free end 21 to stop the free end 21 . The advantage of using the limiter 3 with a sheet-like structure is that it is easy to be processed by sheet metal technology. In other embodiments, the limiter 3 can also be in other shapes such as rod-shaped, block-shaped, etc., as long as the limiter 3 is fixed It only needs to be connected to the armature 1 and have the effect of restricting the bending of the free end 21 of the movable reed 2 .

As shown in FIG. 2 , the second end 31 of the limiting member 3 is also bent and extended downward toward the free end 21 , thereby forming an abutment plane toward the free end 21 to improve the blocking effect on the free end 21 .

As shown in Figure 3-4, the middle part of the movable reed 2 is fixedly connected to the armature 1, one end of the movable reed 2 extends to the outside of the armature 1 to form a free end 21, and the other end goes over the armature 1 and extends downward to form a The hanging ring 24 is lapped on the hook of the yoke, and the electrical parameters of the product can be adjusted to an appropriate range by adjusting the tension of the hook. The limiting member 3 has a "Z"-shaped bent sheet structure, the first end 32 is fixed to the side of the middle part of the movable spring 2 in a deviated manner, and the connecting portion 33 extends obliquely toward the free end 21, so that the second end 31 extends above the free end 21 to stop the free end 21 .

During the relay pull-in process, the free end 21 will elastically bend normally. In order to prevent the free end 21 from colliding with the limiter 3 during the normal bending process, the relative position of the limiter 3 and the free end 21 is set as: During the pull-in process of the contact switch assembly, there is always a gap between the limiting member 3 and the free end 21 . Referring to FIG. 2 , in this embodiment, in the static state, the limit gap W between the limiter 3 and the free end 21 is between 0.5mm and 1.5mm, so that the contact switch assembly can meet the normal suction requirements. During the closing process, the free end 21 will not bend and collide with the limiting member 3, and the limiting member 3 can limit the bending amplitude of the free end 21 when the relay is impacted by an abnormal external force.

As a preferred embodiment, the limiter 3 can be made of rigid materials with high rigidity such as stainless steel and aluminum alloy, so as to ensure the structural rigidity of the limiter 3 and improve reliability.

The fixed connection between the limiter 3 and the armature 1 can be realized by riveting, screwing, welding and other processes. Position member 3 rotates.

In addition to the relay, the contact switch assembly provided in this embodiment can also be applied to other switching appliances, such as a contactor.

Example 2:

This embodiment provides a relay, which is similar in structure to the relay in Embodiment 1, including a contact switch assembly, and the difference lies in the structures of the moving reed and the limiting member in this embodiment.

As shown in Figures 7-9, the contact switch assembly of the relay in this embodiment includes an armature 1', a movable reed 2', and a limiting member 3'. One end of the movable reed 2' is fixedly connected to the armature 1', and the other end is connected to the armature 1'. The outer side of the armature 1' extends to form a free end 21', and a movable contact is integrally formed on the free end 21'. The limiter 3' is in the shape of an "L"-shaped bent sheet, and the limiter 3' is fixedly connected to the armature 1', including a first end 32', a second end 31', and a first end 32' and a The connecting portion 33' of the second end 31', for the convenience of description, defines the free end 21' to be at the front end of the movable reed 2', wherein the first end 32' is fixed on the surface of the armature 1' behind the movable reed 2', The connecting portion 33' spans over the movable spring 2', so that the second end 31' extends above the free end 21' to form a stop for the free end 21'.

This example is an adaptive structural change made to the limiter based on the structure of different moving reeds, which shows that the structure of the limiter can be various. The structure of the stopper that produces the blocking effect is a feasible solution.

Example 3:

Referring to FIG. 10 , the present embodiment provides a relay, including an armature 1A, the armature 1A is in a seesaw structure, the movable reed 2A is fixedly connected to the armature 1A, and the armature 1A swings to drive the movable reed 2A and the fixed stationary contact 4A cooperates to realize the load switching of the relay. The relay also includes a limiter 3A fixedly connected to the armature 1A. The limiter 3A stops the free end of the moving reed 2A to limit the extent of bending and deformation of the free end in the direction away from the stationary contact 4A, thereby connecting the moving reed. The bending of the free end of 2A is limited to the range of elastic deformation, so as to avoid problems such as plastic deformation and fatigue fracture of movable spring 2A.

That is, in addition to the single-side click-type relays shown in the above-mentioned Embodiments 1 and 2, the stopper structure can also be used for the double-side seesaw type relay shown in this example.

Example 4:

Referring to FIG. 11 , the present embodiment provides a relay, including a coil, a static iron core and a moving iron core 1B, a push rod 1B01 (as an actuator of the electromagnetic actuation mechanism) is fixedly connected to the moving iron core 1B, and a moving reed 2B It is fixedly connected to the push rod 1B01, and the movable iron core 1B moves linearly under the attraction of the static iron core, so that the movable reed 2B on the push rod 1B01 contacts or separates from the two fixed static contacts 4B synchronously, so as to realize the connection of the relay. or disconnect. The relay also includes a limiter 3B fixedly connected to the push rod 1B01. The limiter 3B stops the free end of the moving reed 2B to limit the extent of bending and deformation of the free end in the direction away from the stationary contact 4B, thereby moving the moving spring. The bending of the free end of the piece 2B is limited within the range of elastic deformation, so as to avoid problems such as plastic deformation and fatigue fracture of the movable spring piece 2B.

That is, in addition to the swing-type relays shown in the above-mentioned Embodiments 1-3, the actuators of the present embodiment can also be used for the direct-acting relays.

Although the present invention has been specifically shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that the present invention, in form and detail, may be Various changes made by the utility model all fall into the protection scope of the present utility model.

Claims (13)

1. A contact switch assembly, comprising an electromagnetic actuating mechanism, a static contact and a moving reed, the electromagnetic actuating mechanism includes an action executing member with a movable stroke, and the moving reed is fixed on the electromagnetic actuating assembly. The action actuator moves synchronously with it, the movable reed includes a free end with a movable contact, and the action actuator drives the movable contact on the free end of the movable reed to approach or move away from The static contact can be connected or disconnected, and it is characterized in that: it further comprises a limiter, the limiter is fixedly connected with the action executing element in a relative position, and the limiter is connected with the The free end of the moving reed has a set limit distance, and the limit piece is used to stop the free end of the moving spring to limit the amplitude of its bending deformation within the limit distance. The action actuator adjusts the size of the gap between the movable contact and the stationary contact, and also ensures that the set limit distance does not change. 2 . The contact switch assembly according to claim 1 , wherein the electromagnetic actuating mechanism comprises a coil, an iron core, and a yoke, and the actuating element is an armature with a swinging movable stroke, which defines the If the movable contact is relatively above the stationary contact, the stationary contact is relatively under the movable contact, the limiting member is in a sheet-like structure, and the first end of the limiting member is fixedly connected to the On the armature, the second end extends above the free end, so that the second end of the limiting member and the free end of the movable spring form the limiting distance. 3 . The contact switch assembly according to claim 2 , wherein the second end of the limiting member is further bent and extended downward toward the free end. 4 . 4 . The contact switch assembly according to claim 2 , wherein the middle part of the movable reed is fixedly connected to the armature, and one end of the movable reed extends to the outside of the armature to form the armature. 5 . The free end and the other end go over the armature and extend downward to form a hanging ring that is hooked and matched with the yoke. The second end and the connecting part connecting the first end and the second end, the first end is fixed to one side of the middle part in a deviated manner, and the connecting part extends obliquely toward the free end, so that the The second end extends above the free end. 5 . The contact switch assembly according to claim 2 , wherein one end of the movable reed is fixedly connected to the armature, and the other end extends to the outside of the armature to form the free end, and the limit The position piece is in the shape of an "L"-shaped bent sheet, including the first end, the second end, and a connecting portion connecting the first end and the second end, defining the free end in the moving spring The front end of the plate, wherein the first end is fixed behind the movable spring plate, and the connecting portion spans above the movable spring plate, so that the second end extends above the free end. 6 . The contact switch assembly according to claim 1 , wherein the relative position of the limiting member and the free end is set such that: when the action executing member drives the movable contact and the static contact. 7 . In the process of point-to-point pull-in to realize connection, there is always a gap between the limiting member and the free end. 7 . The contact switch assembly according to claim 6 , wherein in a static state, the limit distance between the limit member and the free end of the movable spring is set at: 0.5 . 8 . Between mm and 1.5mm. 8. The contact switch assembly according to claim 1, wherein the limiting member is made of rigid material. 9 . The contact switch assembly according to claim 1 , wherein 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. 10 . on the contact patch. 10 . The contact switch assembly according to claim 1 , wherein the limiting member is riveted and fixed on the action executing member through at least two riveting points. 11 . 11 . The contact switch assembly according to claim 1 , wherein the electromagnetic actuating mechanism comprises a coil, a static iron core and a moving iron core, and the static iron core attracts the moving iron core linearly through electromagnetic attraction. 12 . moving, the action executing member is a push rod fixedly connected with the moving iron core, and the limiting member is fixedly connected with the push rod. 12. A switch appliance, characterized in that it comprises the contact switch assembly according to any one of claims 1-11. 13. The switching device according to claim 12, wherein the switching device is a relay.

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