Sealed relay

Abstract

The utility model provides a sealed relay, which comprises an electromagnetic part and a contact part, an auxiliary contact part of the contact part comprises a movable closing reed, a static closing reed and an auxiliary reed positioned between the movable closing reed and the static closing reed, and two push rods are assembled on an armature of the electromagnetic part. The two push rods are located on the side, facing the movable closing reed, of the auxiliary reed and the side, facing the static closing reed, of the auxiliary reed respectively, and when the sealed relay is excited or released, the auxiliary reed is driven to act through the two push rods respectively. Contact stability of the auxiliary contact part can be ensured, and the relay correction difficulty is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of relays, specifically to a sealed relay. Background Technology

[0002] Existing auxiliary-change type balanced force sealed relays typically include an auxiliary contact section to confirm the status of the main contact section, as shown in the reference section. Figure 1 and Figure 2 As shown, the existing structure has a push rod 2 on the armature 1, which is located above the auxiliary spring 3 of the auxiliary contact section. When the coil is energized, the auxiliary spring 3 deforms and returns to the upper stationary contact (i.e., the contact of the normally engaged spring 4). When the coil is de-energized (i.e., released), the swing of the armature 1 presses down on the auxiliary spring 3 through the push rod 2, causing the auxiliary spring 3 to move down and contact the lower stationary contact (i.e., the contact of the normally engaged spring 5). The armature 1 and the push rod 2 are key components in the assembly, respectively serving the functions of positioning and fixing, elastic support, and energy conversion and transmission. The existing relay with auxiliary contacts has the following main structural problems: 1. Because the auxiliary spring 3 is a cantilever beam structure under energized conditions, it is prone to breakage under vibration; 2. During the release process, the static engagement pressure generated by the deformation of the auxiliary spring 3 itself will hinder the release of the armature, resulting in a low release voltage and low correction efficiency. Utility Model Content

[0003] Therefore, to solve the above problems, this utility model provides a sealed relay.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A sealed relay includes an electromagnetic part and a contact part. The switching of the armature of the electromagnetic part drives the contact part to open and close. The contact part includes an auxiliary contact portion, which includes a normally open spring, a stationary open spring, and an auxiliary spring located between the normally open spring and the stationary open spring. A push rod assembly is also connected to the armature of the electromagnetic part. The push rod assembly includes a first push rod located on the side of the auxiliary spring facing the normally open spring and a second push rod located on the side facing the stationary open spring. When the sealed relay is energized or released, the auxiliary spring is driven to move by the first push rod and the second push rod, respectively.

[0006] Furthermore, both the first push rod and the second push rod are equipped with spherical contact portions at their ends, and these spherical contact portions contact the auxiliary spring.

[0007] Furthermore, during release, the auxiliary spring first presses against the second push rod for a certain distance, and then the first push rod begins to contact and push the auxiliary spring until it contacts the stationary spring.

[0008] Furthermore, the contact portion includes a main contact portion, which includes at least one set of moving springs, an input terminal, and an output terminal. The moving spring is fixed on the armature of the electromagnetic portion, the input terminal is connected to the moving spring, and the output terminal corresponds to and is separated from the cantilever of the moving spring.

[0009] Furthermore, the auxiliary contact portion and the output terminal are located on opposite sides of the input terminal, respectively.

[0010] Furthermore, it also includes a housing and a base plate. The input terminal, output terminal, dynamic engagement spring, static engagement spring, and auxiliary spring are all assembled on the base plate. The electromagnetic part is connected to the base plate by a bracket, so that the electromagnetic part and the contact part are distributed vertically. The housing is sealed on the base plate, and the electromagnetic part and the contact part are located inside the housing.

[0011] Furthermore, the movable spring is located above the auxiliary spring, and the stationary spring is located below the auxiliary spring; the first push rod and the second push rod are located above and below the auxiliary spring, respectively.

[0012] Furthermore, the base plate is also provided with three conversion terminals, which are sealed through the base plate. The dynamic engagement spring, static engagement spring, and auxiliary spring are respectively connected to the inner ends of the three conversion terminals located inside the housing.

[0013] Furthermore, both the lower side of the moving spring and the upper side of the stationary spring are provided with stationary contacts for contacting the auxiliary spring.

[0014] Furthermore, the first end of the first push rod and the first end of the second push rod are respectively connected to the armature of the electromagnetic part; or, the push rod assembly further includes a fixing part, wherein the first end of the first push rod and the first end of the second push rod are both connected to the fixing part and connected to the armature of the electromagnetic part through the fixing part.

[0015] Furthermore, the number of the first push rods is one or more; and / or the number of the second push rods is one or more.

[0016] The technical solution provided by this utility model has the following beneficial effects:

[0017] This application adds a push rod to the original design, so that the two push rods (i.e., the first push rod and the second push rod) are located on the side of the auxiliary spring facing the moving spring and the side facing the stationary spring, respectively.

[0018] 1. When the coil is excited, one of the push rods (i.e. the second push rod on the side facing the stationary contact spring) will apply a pushing force to the auxiliary spring towards the moving contact spring. Therefore, the auxiliary spring will generate more deformation in the overtravel section, increase the moving contact pressure, and ensure contact stability. Thus, the auxiliary spring will be improved in terms of environmental mechanical performance, and the auxiliary spring is not easy to shake off due to changes in the external environment.

[0019] 2. Deformation of the auxiliary reed in the overtravel section will increase the tracking of the product (overtravel section), improve the reliable contact between the auxiliary reed and the normally engaged reed, reduce the generation of electric arc during the closing and releasing phases, and make the reed more resistant to ablation, thus improving its lifespan.

[0020] 3. When the coil is de-energized, the push rod needs to overcome the static closing pressure of the auxiliary spring during the armature release process. Therefore, the product will have a problem of low release voltage (that is, during the release process, when the push rod on the side facing the normally closed spring pushes the auxiliary spring, it will be resisted by the auxiliary spring, resulting in the armature not releasing smoothly and the problem of low release voltage). If the structure of the first push rod and the second push rod of this application is provided, the auxiliary spring will first give a push rod (that is, the second push rod on the side facing the static closed spring) a push force during the initial release. This push rod drives the armature to obtain a pushing force. The armature obtains kinetic energy, which will help the armature release and reduce the difficulty of relay calibration. Attached Figure Description

[0021] Figure 1 The diagram shown is a partial structural schematic of a sealed relay in the energized state in the prior art;

[0022] Figure 2 The diagram shown is a partial structural schematic of a sealed relay in the released state in the prior art;

[0023] Figure 3 The diagram shown is a schematic representation of the connection structure between the armature and the two push rods of the sealed relay in the embodiment.

[0024] Figure 4 The diagram shown is a schematic diagram of the connection structure between the base plate and the auxiliary contact portion of the sealed relay in the embodiment.

[0025] Figure 5 The diagram shown is a partial structural schematic of the sealed relay in the energized state in the embodiment.

[0026] Figure 6 The diagram shown is a partial structural schematic of the sealed relay in the released state in the embodiment. Detailed Implementation

[0027] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0028] In the description of this invention, terms such as "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0030] Reference Figures 3 to 6 As shown, this embodiment provides a sealed relay, including an electromagnetic part and a contact part. The switching of the armature 11 of the electromagnetic part drives the contact part to open and close. The contact part includes a main contact part and an auxiliary contact part. Specifically, both the electromagnetic part and the main contact part adopt existing technology. For example, the electromagnetic part is composed of components such as a coil, a yoke, and an armature 11. The main contact part includes at least one set of moving springs, an input terminal, and an output terminal. The moving spring is fixed on the armature 11 of the electromagnetic part. An insulating block is fixed on the armature 11, and the moving spring is mounted on the insulating block. The input terminal is connected to the moving spring, and the output terminal corresponds to and is separated from the cantilever of the moving spring. When the sealed relay is energized, the armature 1 drives the moving spring to contact the output terminal. When the sealed relay is de-energized (i.e., released), the moving spring separates from the output terminal. The specific connection relationship and cooperation method are all existing technology and will not be described in detail here.

[0031] The auxiliary contact portion includes a dynamically engaged spring 22, a stationary spring 23, and an auxiliary spring 21 located between the dynamically engaged spring 22 and the stationary spring 23. The dynamically engaged spring 22 and the stationary spring 23 are arranged vertically, and the auxiliary spring 21 is located between them. In this embodiment, the auxiliary contact portion and the output terminal are located on opposite sides of the input terminal.

[0032] The armature 11 of the electromagnetic part is also connected to a push rod assembly 12. Specifically, the push rod assembly 12 can be fixed to the armature 11 by welding or other methods. The push rod assembly 12 includes a first push rod 121 located on the side of the auxiliary spring 21 facing the normally engaged spring 22 and a second push rod 122 located on the side of the stationary spring 23. That is, the first push rod 121 and the second push rod 122 are located on the upper and lower sides of the auxiliary spring 21, respectively. When the sealed relay is energized, the second push rod 122 applies an upward pushing force to the auxiliary spring 21. Therefore, the auxiliary spring 21 will deform more in the overtravel section, increasing the normally engaged contact pressure (i.e., the contact pressure between the auxiliary spring 21 and the normally engaged spring 22), ensuring stable contact. Thus, the auxiliary spring 21 will have improved resistance to environmental mechanical properties, and the auxiliary spring 21 is less likely to shake open due to changes in the external environment. Meanwhile, the deformation of the auxiliary reed 21 in the overtravel section will increase the tracking of the product (overtravel section), improve the reliable contact between the auxiliary reed 21 and the normally engaged reed 22, reduce the generation of electric arc during the closing and releasing stages, and make the reed more resistant to ablation, thus improving its lifespan.

[0033] When the coil is de-energized (i.e., when the sealed relay releases), the auxiliary spring 21 initially applies a pushing force to the second push rod 122. This second push rod 122 then drives the armature 11 to gain a pushing force. The kinetic energy gained by the armature 11 helps it release, reducing the difficulty of relay calibration. Specifically, after the auxiliary spring 21 presses against the second push rod 122 for a certain distance, the first push rod 121 begins to contact and push the auxiliary spring 21 until it contacts the stationary spring 23.

[0034] In this embodiment, the ends of the first push rod 121 and the second push rod 122 are both equipped with spherical contact portions 13, and the spherical contact portions 13 contact the auxiliary spring 21. This arrangement can reduce the contact area, that is, reduce the contact friction, reduce the obstruction, and make the operation smoother.

[0035] Specifically, the sealed relay also includes a housing and a base plate 31. The input terminal, output terminal, normally closed spring 22, normally closed spring 23, and auxiliary spring 21 are all mounted on the base plate 31. The electromagnetic part is connected to the base plate 31 by a bracket, so that the electromagnetic part and the contact part are distributed vertically. The housing is sealed on the base plate 31, and the electromagnetic part and the contact part are located inside the housing; thus, a sealed assembly is achieved.

[0036] More specifically, the base plate 31 is also provided with three conversion terminals 15, which are sealed and pass through the base plate 31. The moving contact spring 22, the stationary contact spring 23, and the auxiliary spring 21 are respectively connected to the inner ends of the three conversion terminals 15 located within the housing. At the same time, the lower side of the moving contact spring 22 and the upper side of the stationary contact spring 23 are provided with stationary contacts 24 for contacting the auxiliary spring 21. Through the above structural arrangement, the stable assembly of the auxiliary contact part is achieved.

[0037] Of course, in other embodiments, the specific assembly method of the sealed relay is not limited to this.

[0038] Furthermore, in this embodiment, there is one first push rod 121 and one second push rod 122, and both the first push rod 121 and the second push rod 122 are independent rods. The head end of the first push rod 121 and the head end of the second push rod 122 are respectively connected to the armature 11 of the electromagnetic part. Of course, in other embodiments, the push rod group 12 may also include a fixing part, and the head end of the first push rod 121 and the head end of the second push rod 122 are both connected to the fixing part and connected to the armature 11 of the electromagnetic part through the fixing part; or there may be multiple first push rods 121, and multiple first push rods 121 act together on the auxiliary spring 21; or there may be multiple second push rods 122, and multiple second push rods 122 act together on the auxiliary spring 21, and so on.

[0039] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A sealed relay comprising an electromagnetic portion and a contact portion, switching of an armature of the electromagnetic portion actuating opening and closing of the contact portion; the contact portion comprising an auxiliary contact portion, the auxiliary contact portion comprising a moving contact spring, a stationary contact spring and an auxiliary spring between the moving contact spring and the stationary contact spring, characterised in that: The armature of the electromagnetic part is further connected with a push rod set, which includes a first push rod on the side of the auxiliary spring leaf facing the moving spring leaf and a second push rod on the side of the auxiliary spring leaf facing the static spring leaf, and the auxiliary spring leaf is driven to move by the first push rod and the second push rod respectively when the sealed relay is energized or released.

2. The sealed relay of claim 1, wherein: The end of the first push rod and the end of the second push rod are both equipped with a spherical contact part, and the spherical contact part is in contact with the auxiliary spring leaf.

3. The sealed relay of claim 1, wherein: When released, the auxiliary spring leaf first presses the second push rod for a stroke, and then the first push rod starts to contact and push the auxiliary spring leaf to contact the static spring leaf.

4. The sealed relay of claim 1, wherein: The contact part includes a main contact part, which includes at least one set of moving spring, input terminal and output terminal, the moving spring is fixed on the armature of the electromagnetic part, the input terminal is connected with the moving spring, and the output terminal corresponds to the cantilever of the moving spring and is separated from the cantilever.

5. The sealed relay of claim 4, wherein: The auxiliary contact part and the output terminal are respectively located on the opposite sides of the input terminal.

6. The sealed relay of claim 4, wherein: It also includes a cover and a bottom plate, the input terminal, the output terminal, the moving spring leaf, the static spring leaf and the auxiliary spring leaf are all assembled on the bottom plate, the electromagnetic part is connected to the bottom plate through a support, so that the electromagnetic part and the contact part are distributed vertically; the cover is sealed and wrapped on the bottom plate, and the electromagnetic part and the contact part are located in the cover.

7. The sealed relay of claim 6, wherein: The moving spring leaf is located on the upper side of the auxiliary spring leaf, and the static spring leaf is located on the lower side of the auxiliary spring leaf; the first push rod and the second push rod are respectively located on the upper and lower sides of the auxiliary spring leaf.

8. The sealed relay of claim 7, wherein: The bottom plate is also provided with three conversion terminals, which are sealed and passed through the bottom plate, and the moving spring leaf, the static spring leaf and the auxiliary spring leaf are respectively connected to the inner ends of the three conversion terminals located in the cover.

9. The sealed relay of claim 8, wherein: The lower side of the moving spring leaf and the upper side of the static spring leaf are both provided with a static contact point for contacting the auxiliary spring leaf.

10. The sealed relay of claim 1, wherein: The first end of the first push rod and the first end of the second push rod are respectively connected to the armature of the electromagnetic part; or, the push rod set further includes a fixed part, and the first end of the first push rod and the first end of the second push rod are both connected to the fixed part and connected to the armature of the electromagnetic part through the fixed part.

11. The sealed relay of claim 1, wherein: The number of the first push rod is one or more; and / or, the number of the second push rod is one or more.

Images