A push mechanism and relay

Abstract

The application discloses a pushing mechanism and a relay, which comprises a fixed support, the fixed support comprises a first support frame, a second support frame and a third support frame, the first support frame, the second support frame and the third support frame are sequentially connected and integrally formed, the second support frame is in the shape of ']' so that an opening is formed on one side of the second support frame, opposite ends of the first support frame and the third support frame are respectively connected to two ends of the second support frame near the opening, opposite ends of the first support frame and the third support frame are respectively provided with engaging structures, and the first support frame and the third support frame are connected through the engaging structures. The application can avoid deformation of the fixed support, ensure the connecting strength of the fixed support, further ensure cooperation between components installed on the inner side of the fixed support, and avoid the situation that the pushing mechanism is stuck, loosened and structurally damaged.

Description

Technical Field

[0001] This invention relates to the field of switching device technology, and more specifically to a drive mechanism and a relay. Background Technology

[0002] See Figure 1-4 As shown, this is an existing relay actuation mechanism. The fixed bracket 1' is a riveted structure. The fixed bracket 1' includes a U-shaped support frame 11' and an upper support plate 12'. The upper left and right sides of the U-shaped support frame 11' have assembly holes. The left and right ends of the upper support plate 12' are inserted into the two assembly holes and riveted. The lower left and right sides of the upper support plate 12' are respectively equipped with upper magnetic conductors 2'. The stress generated by the riveting process will cause the fixed bracket 1' to deform, as well as other components in the actuation mechanism to deform. This will cause gaps to appear at the riveting joint between the upper support plate 12' and the U-shaped support frame 11', reducing the connection strength. In severe cases, the two upper magnetic conductors 2' at the upper support plate 12' may fall off, posing a fatal risk. Furthermore, the riveting will cause the middle of the upper support plate 12' to bulge, causing the two upper magnetic conductors 2' to tilt and form an V-shape structure. This can lead to jamming, loosening, and structural damage in the actuation mechanism, seriously affecting the safety and reliability of the relay during operation. Summary of the Invention

[0003] The present invention aims to provide a pushing mechanism to solve the technical problem of easy deformation of the fixed support.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: a pushing mechanism, including a fixed bracket, the fixed bracket including a first support frame, a second support frame, and a third support frame, the first support frame, the second support frame, and the third support frame are sequentially connected and integrally formed, the second support frame is in the shape of "]" with an opening on one side, the opposite ends of the first support frame and the third support frame are respectively connected to the two ends of the second support frame near the opening, the opposite ends of the first support frame and the third support frame respectively have a joining structure, and the first support frame and the third support frame are connected by the joining structure.

[0005] Preferably, the second support frame includes a first support segment and two second support segments, the two second support segments being integrally connected to both ends of the first support segment along its length and arranged opposite to each other; the first support frame and the third support frame are integrally connected to the ends of the two second support segments away from the first support segment, and the first support frame and the third support frame extend from the two second support segments toward each other to enclose and seal the opening of the second support frame.

[0006] Preferably, the joining structure is a snap-fit ​​structure, in which the first support frame piece and the third support frame piece are connected and fixed together by the snap-fit ​​structure.

[0007] Preferably, the first support frame, the third support frame, and their corresponding engaging structures are all on the same plane.

[0008] Preferably, the engaging structure includes a corresponding engaging portion and a corresponding slot portion, which are engaged and connected.

[0009] Preferably, the snap-fit ​​portion and the slot portion are both dovetail-shaped, circular, or triangular.

[0010] Preferably, the first support frame piece and the third support frame piece are connected and fixed to each other by riveting, welding, threaded connection, or adhesive bonding.

[0011] Preferably, a reinforcing block is fixedly connected to one side between the first support frame and the third support frame.

[0012] Preferably, the shape and structure of the reinforcing block are the same as the shape and structure of the corresponding areas on the first support frame and the third support frame.

[0013] Preferably, the reinforcing block has a perforated hole at the position corresponding to the joint structure.

[0014] Preferably, it further includes an insulating base and a movable shaft, with one end of the first support frame, the third support frame, and the movable shaft being injection molded and embedded into the insulating base as a single unit.

[0015] Preferably, the first support frame piece and the third support frame piece are connected and fixed together by a joint structure, and the docking position is a closed connection.

[0016] Preferably, the bottom of the fixed bracket is formed with a clearance hole for the movable shaft to pass through, and the clearance hole is located between the first support frame piece and the third support frame piece.

[0017] Preferably, it further includes a movable contact bridge and an elastic element. The movable contact bridge and the elastic element are installed in a fixed bracket. The movable contact bridge abuts against the inside of the second support frame. The two ends of the elastic element are respectively connected to the movable contact bridge and the insulating base.

[0018] Preferably, it also includes an upper magnetic conductor and a lower magnetic conductor. The upper magnetic conductor is fixedly connected to the inner top side of the second support frame and installed above the moving contact bridge, while the lower magnetic conductor is installed on the moving contact bridge.

[0019] Preferably, it also includes an insulating cover, a stationary contact, and a yoke plate. The stationary contact is sealed and installed on the top of the insulating cover, and the insulating cover is sealed and connected to one side of the yoke plate. A first chamber is formed between the insulating cover and the yoke plate. A fixed bracket is installed in the first chamber, and the moving contact bridge is correspondingly matched with the stationary contact.

[0020] Preferably, the second support frame includes a first support section and two second support sections, which are integrally connected to both ends of the first support section along its length and are arranged opposite to each other. The front and rear sides of the two second support sections of the second support frame are respectively provided with arc-shaped ribs, which protrude towards the outside of the fixed bracket. The inner wall of the insulating cover is provided with rib protrusions corresponding to the arc-shaped ribs, which are used to limit the arc-shaped ribs to prevent the fixed bracket from rotating.

[0021] Preferably, it also includes a metal shell and a coil assembly. The metal shell is sealed and installed on the side of the yoke plate away from the insulating cover. The yoke plate and the metal shell enclose a second chamber. The yoke plate has a through hole. The first chamber and the second chamber are connected to each other through the through hole. A moving iron core is installed in the second chamber. The other end of the movable shaft passes through the through hole into the second chamber and is fixedly connected to the moving iron core. The metal shell is installed inside the coil assembly.

[0022] The present invention also provides a relay comprising any of the aforementioned actuation mechanisms.

[0023] The present invention has the following beneficial effects:

[0024] (1) The present invention includes a fixed bracket, comprising a first support frame, a second support frame, and a third support frame. The first support frame, the second support frame, and the third support frame are sequentially connected and integrally formed. The second support frame is shaped like a "]" with an opening on one side. The opposite ends of the first support frame and the third support frame are respectively connected to the two ends of the second support frame near the opening. The opposite ends of the first support frame and the third support frame have joint structures. The first support frame and the third support frame are connected by the joint structures. The connection method of the present invention eliminates the traditional riveting fixing method, further enhancing the deformation resistance of the fixed bracket. This avoids deformation of the fixed bracket at the support frame. Compared with the fixed bracket of the existing riveted push mechanism, the technical solution of the present invention can avoid the stress generated during the riveting process from causing deformation of the fixed bracket and affecting the cooperation between other components in the push mechanism. This ensures the connection strength of the fixed bracket and ensures that the two upper magnetic conductors installed on it always remain on the same plane without falling off or tilting. This avoids jamming, loosening and structural damage to the push mechanism. Alternatively, it can ensure that the moving contact bridge installed on it alone is not jammed, loosened and damaged by the deformation of the fixed bracket, thus ensuring the safety and reliability of the relay during operation.

[0025] (2) The first support frame, the third support frame and their corresponding locking structure are all on the same plane. The same plane can simplify the forming process of the support frame. The overlapping and matching between the moving components inside the same plane is better controlled, the precision difference between parts is easier to control, and the risk of jamming is less likely to occur.

[0026] (3) The snap-fit ​​structure includes a snap-fit ​​part and a snap-fit ​​part that correspond to each other. The snap-fit ​​part and the snap-fit ​​part are snap-fit ​​connected accordingly. Both the snap-fit ​​part and the snap-fit ​​part are dovetail-shaped, which is simple in structure and ensures the stability of the snap-fit ​​connection between the first support frame piece and the third support frame piece.

[0027] (4) A reinforcing block is fixedly connected to one side between the first support frame and the third support frame. The shape and structure of the reinforcing block are the same as the shape and structure of the corresponding area of ​​the first support frame and the third support frame, thereby preventing the first support frame and the third support frame from being deformed by force in the direction parallel to and perpendicular to their respective planes. In particular, by means of a snap-fit ​​connection, the first support frame and the third support frame are guaranteed not to be deformed by force in the horizontal direction. The reinforcing block further prevents the first support frame and the third support frame from being deformed in the direction perpendicular to their respective planes, thereby further improving the processing strength and stability of the fixed bracket.

[0028] (5) The first support frame, the third support frame and one end of the movable shaft are injection molded and embedded into the insulating base as a whole. This setting allows the insulating base to cover and fix the joint structure when the insulating base is injection molded together with the first support frame and the third support frame, preventing the first support frame and the third support frame from moving or shifting in the up-down, front-back and left-right directions. This further improves the connection strength and stability of the fixed bracket, preventing the fixed bracket from deforming due to stamping during injection molding, and also making the joint position of the fixed bracket integrally formed with the injection molded insulating base, avoiding loosening of the joint position during subsequent relay operation.

[0029] (6) The first support frame, the third support frame, and one end of the movable shaft are injection molded and embedded into the insulating base as a whole. The first support frame and the third support frame are fixed together by a snap-fit ​​structure and the connection position is closed. After the fixed bracket, the insulating base, and the movable shaft are injection molded, the fixed bracket is relatively closed. With this setting, the adjacent first support frame and the third support frame are fixed together by the snap-fit ​​structure and are not easily deformed by the injection pressure. This reduces or even avoids the plastic liquid overflowing to the side of the first support frame and the third support frame where the elastic element is placed due to the deformation of the bracket during the injection process. In this way, the plastic cannot enter the top of the first support frame and the third support frame. The position of the first support frame and the third support frame where the elastic element is placed is basically free of plastic. This avoids the friction and scraping between the elastic element and the plastic when the push mechanism moves up and down with the moving iron core during the relay operation. This avoids the generation of plastic debris entering the contacts, causing the contacts to not conduct, and thus causing the relay to fail. This further improves the working stability of the relay.

[0030] (7) By adding arc-shaped ribs and limiting the arc-shaped ribs by the rib protrusions on the inner wall of the insulating cover, the fixed bracket can be prevented from rotating. This reduces the rib protrusion width and the width of the moving contact bridge, thereby reducing the overall weight of the moving parts composed of the moving contact bridge and the elastic element. It also makes the arc extinguishing space inside the insulating cover larger, further reducing the molding difficulty and defect rate of the insulating cover, and simplifying the production mold of the insulating cover. Attached Figure Description

[0031] Figure 1 This is a 3D diagram of a riveting-type push mechanism based on existing technology;

[0032] Figure 2 This is a schematic diagram of the fit between the fixed bracket and the insulating base of the existing riveted push mechanism;

[0033] Figure 3 This is a schematic diagram illustrating the deformation process of the upper support plate of a riveted push mechanism in existing technology.

[0034] Figure 4 This is a cross-sectional view of a relay with a riveted push mechanism in the prior art;

[0035] Figure 5 This is a bottom view and a partially enlarged schematic diagram of the fixed bracket according to Embodiment 1 of the present invention;

[0036] Figure 6 This is a perspective view of the fixing bracket according to Embodiment 1 of the present invention;

[0037] Figure 7 This is a partial exploded view of the pushing mechanism of Embodiment 1 of the present invention;

[0038] Figure 8 This is a schematic diagram of the cooperation between the fixed bracket and the insulating base in Embodiment 1 of the present invention;

[0039] Figure 9 This is an exploded schematic diagram of the pushing mechanism of Embodiment 1 of the present invention;

[0040] Figure 10 This is a longitudinal sectional view of the pushing mechanism of Embodiment 1 of the present invention at one angle;

[0041] Figure 11 This is a longitudinal sectional view of the pushing mechanism of Embodiment 1 of the present invention from another angle;

[0042] Figure 12 This is a cross-sectional view of the pushing mechanism of Embodiment 1 of the present invention;

[0043] Figure 13 This is a schematic diagram of the fixed bracket after the reinforcing block is installed on the outside of it according to Embodiment 1 of the present invention;

[0044] Figure 14 This is a schematic diagram of the inner side of the fixed bracket after the reinforcing block is installed in Embodiment 1 of the present invention;

[0045] Figure 15 This is a perspective view of the fixing bracket according to Embodiment 2 of the present invention;

[0046] Figure 16 This is a schematic diagram of the inner side of the fixed bracket after the reinforcing block is installed in Embodiment 2 of the present invention;

[0047] Figure 17 This is a schematic diagram of the fixed bracket after the reinforcing block is installed on the outside of it according to Embodiment 2 of the present invention;

[0048] Figure 18 This is a perspective view of the fixing bracket of Embodiment 3 of the present invention;

[0049] Figure 19 This is a schematic diagram of the fixing bracket after the reinforcing block is installed on the outside of the bracket according to Embodiment 3 of the present invention;

[0050] Figure 20 This is a schematic diagram of the inner side of the fixed bracket after the reinforcing block is installed in Embodiment 3 of the present invention;

[0051] Figure 21 This is a perspective view of the fixing bracket of Embodiment 4 of the present invention;

[0052] Figure 22 This is a perspective view of the fixing bracket of Embodiment 5 of the present invention;

[0053] Figure 23 This is a schematic diagram of the pushing mechanism of Embodiment 6 of the present invention;

[0054] Figure 24 This is a schematic diagram of the connection of the fixed bracket in Embodiment 7 of the present invention;

[0055] Figure 25 This is a schematic diagram of the fixed bracket, insulating base, and movable shaft after injection molding according to Embodiment 8 of the present invention.

[0056] Attached image captions:

[0057] Existing technology components: 1' Fixed bracket, 11' U-shaped support frame, 12' Upper support plate, 2' Upper magnetic conductor, 3' Moving contact bridge, 4' Insulating cover, 41' Rib protrusion, 5' Insulating base, 6' Movable shaft.

[0058] This invention comprises: 1 fixed bracket, 1-1 first support frame, 1-2 second support frame, 1-21 first support section, 1-22 second support section, 1-3 third support frame, 1-4 connecting piece, 2 first chamber, 3 second chamber, 4 metal shell, 5 moving iron core, 6 adjusting shim, 7 reinforcing block, 8 arc-shaped rib, 9 snap-fit ​​part, 10 snap-fit ​​part, 11 upper magnetic conductor, 12 lower magnetic conductor, 13 insulating base, 14 moving contact bridge, 15 elastic element, 16 movable shaft, 17 yoke plate, 18 insulating cover, 181 rib protrusion, 19 stationary contact. Detailed Implementation

[0059] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. 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.

[0060] Example 1.

[0061] See Figure 5-14 As shown, as an embodiment of the present invention, a pushing mechanism is provided, specifically a pushing mechanism for a switching device such as a relay, including a fixed bracket 1. The fixed bracket 1 includes a first support frame 1-1, a second support frame 1-2, and a third support frame 1-3. The first support frame 1-1, the second support frame 1-2, and the third support frame 1-3 are sequentially connected and integrally formed. The fixed bracket 1 is an integrally formed single component. The second support frame 1-2 is shaped like a "]" with an opening on one side. The opposite ends of the first support frame 1-1 and the third support frame 1-3 are respectively connected to the two ends of the second support frame 1-2 near the opening. The opposite ends of the first support frame 1-1 and the third support frame 1-3 respectively have a joining structure. The first support frame 1-1 and the third support frame 1-3 are connected by the joining structure.

[0062] The second support frame 1-2 includes a first support segment 1-21 and two second support segments 1-22. The two second support segments 1-22 are integrally connected to both ends of the first support segment 1-21 along its length and are arranged opposite to each other. The first support frame 1-1 and the third support frame 1-3 are integrally connected to the ends of the two second support segments 1-22 away from the first support segment 1-21. The first support frame 1-1 and the third support frame 1-3 extend from the two second support segments 1-22 toward each other to enclose and seal the opening of the second support frame 1-2, so that the fixed bracket 1 has a rectangular frame structure.

[0063] The fixed bracket 1 of the present invention is integrally formed by sequentially connecting and forming a first support frame 1-1, a second support frame 1-2, and a third support frame 1-3, and the first support frame 1-1 and the third support frame 1-3 are connected by a joint structure. This structure can prevent the fixed bracket 1 from deforming at the first support section 1-21, thereby preventing deformation of the fixed bracket 1. Compared with the fixed bracket 1 of the existing riveted push mechanism, the technical solution of the present invention can avoid the stress generated during the riveting process from causing the fixed bracket 1 to deform and affect the cooperation between other components in the push mechanism, thereby ensuring the connection strength of the fixed bracket 1, ensuring that the two upper magnetic conductors 11 installed on it always remain on the same plane, and will not fall off or tilt and deform, thereby avoiding jamming, loosening and structural damage of the push mechanism, or ensuring that the moving contact bridge 14 installed on it alone is not jammed, loosened and structurally damaged by the deformation of the fixed bracket 1, thus ensuring the safety and reliability of the relay during operation.

[0064] The joining structure is a snap-fit ​​structure. The first support frame 1-1 and the third support frame 1-3 are connected and fixed to each other through the snap-fit ​​structure. The first support frame 1-1, the third support frame 1-3 and their corresponding snap-fit ​​structures are all on the same plane. The same plane can simplify the forming process of the support frame. Moreover, the overlapping and matching between the internal moving components on the same plane is better controlled. The difference in precision between parts is easier to control and the risk of loosening is less likely. Of course, as long as the first support frame 1-1 and the third support frame 1-3 can be fixed together, it is not limited to whether they are on the same plane.

[0065] Of course, the switching device can also be a high-voltage DC contactor, and there are no restrictions here.

[0066] In this embodiment, the engaging structure includes corresponding engaging portions 9 and engaging slot portions 10, which are engaged and connected. Specifically, both the engaging portions 9 and the engaging slot portions 10 are dovetail-shaped, resulting in a simple structure while ensuring the stability of the engaging connection between the first support frame piece 1-1 and the third support frame piece 1-3. Of course, in other cases, the engaging portions 9 and the engaging slot portions 10 can also be circular or triangular.

[0067] In this embodiment, a reinforcing block 7 is fixedly connected to one side between the first support frame 1-1 and the third support frame 1-3. The shape and structure of the reinforcing block 7 are the same as the shape and structure of the corresponding areas on the first support frame 1-1 and the third support frame 1-3. Furthermore, the reinforcing block 7 has a perforated hole at the position corresponding to the joint structure, thereby reducing the overall weight. Specifically, the reinforcing block 7 is annular. Of course, the reinforcing block 7 can also be other shapes that ensure the fixed connection strength of the fixed bracket 1, thereby preventing the first support frame 1-1 from deforming under force in directions parallel and perpendicular to its plane. In particular, by means of a snap-fit ​​connection, while ensuring that the first support frame 1-1 and the third support frame 1-3 do not deform under force in the horizontal direction, the reinforcing block 7 further prevents the first support frame 1-1 and the third support frame 1-3 from deforming in directions perpendicular to their plane, further improving the processing strength and stability of the fixed bracket 1.

[0068] In this embodiment, the reinforcing block 7 is connected and fixed to the first support frame piece 1-1 and the third support frame by welding, riveting, threading, or adhesive application.

[0069] In this embodiment, it also includes an upper magnetic conductor 11, a lower magnetic conductor 12, an insulating base 13, a movable contact bridge 14, an elastic element 15, and a movable shaft 16. The elastic element 15 is a spring. The opening of the second support frame 1-2 is set to face downward. The first support frame 1-1 and the third support frame 1-3 are located at the left and right ends of the lower side of the second support frame 1-2. One end of the first support frame 1-1, the third support frame 1-3, and the movable shaft 16 are embedded in the insulating base 13 as a whole. The upper magnetic conductor 11 is fixedly connected to the inner top side of the second support frame 1-2 and installed above the movable contact bridge 14. The lower magnetic conductor 12 is installed on the movable contact bridge 14. The movable contact bridge 14 and the elastic element 15 are installed in the fixed bracket 1. The movable contact bridge 14 abuts against the inside of the second support frame 1-2. The two ends of the elastic element 15 are respectively abutted against and connected to the movable contact bridge 14 and the insulating base 13.

[0070] In this embodiment, the bottom of the fixed bracket 1 has a clearance hole for the movable shaft 16 to pass through. The clearance hole is located between the first support frame 1-1 and the third support frame 1-3. This arrangement allows the insulating base 13 to cover and fix the interlocking structure when the insulating base 13 is integrally injection molded at the first support frame 1-1 and the third support frame 1-3, preventing the two first support frame pieces 1-1 from moving or shifting in the vertical, horizontal, and back-and-forth directions. This further improves the connection strength and stability of the fixed bracket 1, ensuring that the fixing is prevented during injection molding. The bracket 1 can be deformed so that the snap-fit ​​position of the fixed bracket 1 can be integrally formed with the injection-molded insulating base 13, avoiding loosening of the snap-fit ​​position during subsequent relay operation. The snap-fit ​​structure is set at the first support frame 1-1 and the third support frame 1-3 and is integrally injection molded with the insulating base 13. Compared with the existing riveting structure, there is no need to add riveting or other processes after plastic injection molding, avoiding stress generated by the subsequent process that may cause the plastic insulating base 13 to crack or the part size to change, resulting in jamming or loosening. Furthermore, since the engaging position is located at the first support frame 1-1 and the third support frame 1-3, that is, when the first support frame 1-1, the third support frame 1-3 and the insulating base 13 are injection molded, the upper surface of the first support frame 1-1 and the third support frame 1-3 is the position where the elastic element 15 is placed. Under normal circumstances, no plastic is allowed to be generated. However, by setting the engaging structure and other connecting structures, it can prevent the fixed bracket 1 from deforming during injection molding and stamping, and reduce the amount of material overflowing from the gap between the first support frame 1-1 and the third support frame 1-3 during injection molding. This prevents excessive friction and scraping between the elastic element and the plastic when the pushing mechanism moves up and down with the moving iron core 5 during the relay movement, thereby preventing the generated plastic debris from entering the contacts, causing the contacts to not conduct, and thus causing the relay to fail.

[0071] Alternatively, if the engaging structure is located on the second support frame 1-2, then to prevent the fixing bracket 11 from deforming and loosening during subsequent injection molding with the insulating base 13 or during relay operation, secondary reinforcement and fixing processes such as riveting and welding are required at the engaging structure of the second support frame 1-2. Therefore, optimally, the engaging structure can be set as an integral structure embedded in the insulating base 13 to form a fixed structure. This also eliminates the need for fixing the reinforcing block 7 on one side between the first support frame 1-1 and the third support frame 1-3, saving economic costs and facilitating product miniaturization. Of course, to ensure connection strength, the reinforcing block 7 can also be set on one side between the first support frame 1-1 and the third support frame 1-3 before injection molding.

[0072] In this embodiment, the reinforcing block 7 is disposed on the inner or outer side of the first support frame 1-1 and the third support frame 1-3, which further ensures the strength to prevent deformation of the fixed bracket 1 during injection molding. As a part integrally injection molded with the insulating base 13, the reinforcing block 7 further strengthens the injection molding bonding force between the support frame and the insulating base 13.

[0073] In this embodiment, it also includes an insulating cover 18, a stationary contact, and a yoke plate 17. The stationary contact is sealed and installed on the top of the insulating cover 18. The insulating cover 18 is sealed and connected to one side of the yoke plate 17. A first chamber 2 is formed between the insulating cover 18 and the yoke plate 17. The fixed bracket 1 is installed in the first chamber 2. The moving contact bridge 14 and the stationary contact 19 are correspondingly matched.

[0074] In this embodiment, the front and rear sides of the two second support sections 1-22 of the second support frame 1-2 are respectively provided with arc-shaped ribs 8. The protrusion direction of the arc-shaped ribs 8 is towards the outside of the fixed bracket 1. The inner wall of the insulating cover 18 is provided with rib protrusions 181 corresponding to the arc-shaped ribs 8, which are used to limit the arc-shaped ribs 8 to prevent the fixed bracket 1 from rotating. Compared with the prior art, which limits the moving contact bridge 3' by rib protrusions 41', the above-mentioned structural setting can reduce the protrusion width of rib protrusions 181, and also reduce the width of the moving contact bridge 14, thereby reducing the overall weight of the moving component composed of the moving contact bridge 14 and the elastic element 15. It also makes the arc extinguishing space inside the insulating cover 18 larger, and further reduces the molding difficulty and defect rate of the insulating cover 18, and simplifies the production mold of the insulating cover 18.

[0075] The driving mechanism in this embodiment also includes a metal shell 4 and a coil assembly. The metal shell 4 is sealed and installed on the side of the yoke plate 17 away from the insulating cover 18. The yoke plate 17 and the metal shell 4 enclose a second chamber 3. A through hole is provided on the yoke plate 17. The first chamber 2 and the second chamber 3 are interconnected through the through hole. A moving iron core 5 is installed in the second chamber 3. The other end of the movable shaft 16 passes through the through hole into the second chamber 3 and is fixedly connected to the moving iron core 5. The metal shell 4 is installed in the coil assembly. The moving iron core 5 and the movable shaft 16 are driven to move up and down by the coil being energized, thereby driving the moving contact bridge 14 to make corresponding contact or separation with the stationary contact 19. An adjusting shim 6 is installed on the movable shaft 16 located on the side of the yoke plate 17 away from the moving iron core 5, which is used to adjust the movement stroke of the moving iron core 5 and the movable shaft 16.

[0076] The present invention also provides a relay comprising the actuating mechanism described in Embodiment 1 above.

[0077] Example 2: For the sake of brevity, this example mainly describes the differences from Example 1.

[0078] See Figure 15-17As shown, the present invention also provides a pushing mechanism. The fixed bracket 1 is an integrally formed single component. The opening of the second support frame 1-2 is set to the upward side. The first support frame 1-1 and the third support frame 1-3 are located at the left and right ends of the upper side of the second support frame 1-2. The inner or outer sides of the first support frame 1-1 and the third support frame 1-3 are fixedly connected by riveting or welding to a reinforcing block 7. The reinforcing block 7 is a rounded rectangle, thereby preventing the first support frame 1-1 and the third support frame 1-3 from deforming in the direction perpendicular to their plane, and further improving the processing strength and stability of the fixed bracket 1. The bottom of the fixed bracket 1 is formed with a clearance hole for the movable shaft 16 to pass through. The clearance hole is located at the bottom of the second support frame 1-2.

[0079] Example 3: For the sake of brevity, this example mainly describes the differences from Example 1.

[0080] See Figure 18-20 As shown, the present invention also provides a pushing mechanism. The fixed bracket 1 is an integrally formed single component. The opening of the second support frame 1-2 is set to the right. The first support frame 1-1 and the third support frame 1-3 are located at the upper and lower ends of the right side of the second support frame 1-2. The inner or outer sides of the first support frame 1-1 and the third support frame 1-3 are fixedly connected by riveting or welding to a reinforcing block 7. The reinforcing block 7 is a rounded rectangle, thereby preventing the first support frame 1-1 and the third support frame 1-3 from deforming in the direction perpendicular to their plane, and further improving the processing strength and stability of the fixed bracket 1. Correspondingly, the bottom of the fixed bracket 1 is formed with a clearance hole for the movable shaft 16 to pass through. The clearance hole is located at the bottom of the second support frame 1-2.

[0081] Example 4: For the sake of brevity, this example mainly describes the differences from Example 1.

[0082] See Figure 21 As shown, the present invention also provides a pushing mechanism, wherein the fixed bracket 1 is an integrally formed single component, the opening of the second support frame 1-2 is set to the left, the first support frame 1-1 and the third support frame 1-3 are located at the upper and lower ends of the left side of the second support frame 1-2, and correspondingly, the bottom of the fixed bracket 1 is formed with a clearance hole for the movable shaft 16 to pass through, and the clearance hole is located at the bottom of the second support frame 1-2.

[0083] Of course, a reinforcing block 7 can also be fixedly connected to the inner or outer side of the first support frame 1-1 and the third support frame 1-3 by riveting or welding. The reinforcing block 7 is a rounded rectangle, which avoids deformation of the first support frame 1-1 and the third support frame 1-3 in the direction perpendicular to their plane, and further improves the processing strength and stability of the fixed bracket 1.

[0084] Example 5: For the sake of brevity, this example mainly describes the differences from Example 1.

[0085] See Figure 22 As shown, the present invention also provides a pushing mechanism. The opening of the second support frame 1-2 is arranged facing upward. The first support frame 1-1 and the third support frame 1-3 are located at the left and right ends of the upper side of the second support frame 1-2. A connecting piece 1-4 is also provided between the first support frame 1-1 and the third support frame 1-3. The left and right ends of the connecting piece 1-4 are respectively provided with a snap-fit ​​structure that connects to the first support frame 1-1 and the third support frame 1-3. The first support frame 1-1 and the third support frame 1-3 are connected by the connecting piece 1-4. That is, the fixed bracket 11 is composed of two parts. The two parts are connected by the snap-fit ​​structure to form a fixed bracket 1 with a rectangular frame ring structure. In order to increase stability, riveting or welding operations can be performed at the snap-fit ​​structure position. Correspondingly, a clearance hole for the movable shaft 16 to pass through is formed at the bottom of the fixed bracket 1. The clearance hole is located at the bottom of the second support frame 1-2.

[0086] Example 6: For the sake of brevity, this example mainly describes the differences from Example 1.

[0087] See Figure 23 As shown, the present invention also provides a pushing mechanism, which differs from Embodiment 1 in that the pushing mechanism of this embodiment does not have upper and lower magnetic conductors 12 installed. That is, the first support frame 1-1, the third support frame 1-3 and one end of the movable shaft 16 are embedded in the insulating base 13 as a whole. The movable contact bridge 14 and the elastic member 15 are installed in the fixed bracket 1. The movable contact bridge 14 abuts against the inside of the second support frame 1-2. The two ends of the elastic member 15 are respectively abutted and connected to the movable contact bridge 14 and the insulating base 13. Correspondingly, the bottom of the fixed bracket 1 is formed with a clearance hole for the movable shaft 16 to pass through. The clearance hole is located between the first support frame 1-1 and the third support frame 1-3.

[0088] Example 7: For the sake of brevity, this example mainly describes the differences from Example 1.

[0089] See Figure 24 As shown, the present invention also provides a pushing mechanism, wherein the first support frame 1-1 and the third support frame 1-3 are welded together and fixed by reinforcing blocks 7. Of course, in other embodiments, the first support frame 1-1 and the third support frame 1-3 can also be directly connected and fixed by welding, riveting, threaded connection, or adhesive connection, which is not limited here. Correspondingly, the bottom of the fixed bracket 1 is formed with a clearance hole for the movable shaft 16 to pass through, and the clearance hole is located between the first support frame 1-1 and the third support frame 1-3.

[0090] Example 8: For the sake of brevity, this example mainly describes the differences from Example 1.

[0091] See Figure 25 As shown, the present invention also provides a pushing mechanism. The first support frame 1-1 and the third support frame 1-3 are connected and fixed to each other through a joint structure, and the docking position is closed. After the fixed bracket 1, the insulating base 13, and the movable shaft 16 are injection molded, the fixed bracket 1 is relatively closed. In this way, during injection molding, it is further ensured that the plastic cannot enter above the first support frame 1-1 and the third support frame 1-3. There is no plastic at the position of the first support frame 1-1 and the third support frame 1-3 where the elastic element 15 is placed. This prevents the elastic element from rubbing and scraping against the plastic when the pushing mechanism moves up and down with the moving iron core 5 during the relay movement, thereby preventing the generation of plastic debris into the contacts, which would cause the contacts to lose conductivity and thus cause the relay to fail, further improving the working stability of the relay. Correspondingly, a clearance hole is formed at the bottom of the fixed bracket 1 for the movable shaft 16 to pass through. The clearance hole is located between the first support frame 1-1 and the third support frame 1-3.

[0092] Example 9: For the sake of brevity, this example mainly describes the differences from Example 1.

[0093] The present invention also provides a pushing mechanism, wherein the connecting structure is a snap-fit ​​structure. The first support frame 1-1 and the third support frame 1-3 are connected and fixed to each other through the snap-fit ​​structure. The snap-fit ​​structure includes corresponding snap-fit ​​parts and slot holes. The snap-fit ​​parts and the slot holes are connected in a corresponding snap-fit ​​connection. Specifically, the snap-fit ​​parts are in the shape of bent hooks and pass through the slot holes to achieve the snap-fit ​​connection, thereby ensuring the stability of the connection between the first support frame 1-1 and the third support frame 1-3.

[0094] Although the 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 made to the invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the protection scope of the invention.

Claims

1. A propulsion mechanism, characterized in that: The device includes a fixed bracket, which comprises a first support frame, a second support frame, and a third support frame. The first support frame, the second support frame, and the third support frame are sequentially connected and integrally formed. The second support frame is shaped like a "]" with an opening on one side. The opposite ends of the first support frame and the third support frame are respectively connected to the two ends of the second support frame near the opening. The opposite ends of the first support frame and the third support frame have joint structures, and the first support frame and the third support frame are connected by the joint structures.

2. The driving mechanism according to claim 1, characterized in that: The second support frame includes a first support segment and two second support segments. The two second support segments are integrally connected to both ends of the first support segment along its length and are arranged opposite to each other. The first support frame and the third support frame are integrally connected to the ends of the two second support segments away from the first support segment. The first support frame and the third support frame extend from the two second support segments toward each other to enclose and seal the opening of the second support frame.

3. The driving mechanism according to claim 1, characterized in that: The joining structure is a snap-fit ​​structure, in which the first support frame piece and the third support frame piece are connected and fixed together by the snap-fit ​​structure.

4. The driving mechanism according to claim 3, characterized in that: The first support frame, the third support frame, and their corresponding engaging structures are all on the same plane.

5. The driving mechanism according to claim 3, characterized in that: The engaging structure includes a corresponding engaging part and a slotting part, which engage and connect with each other.

6. The driving mechanism according to claim 5, characterized in that: Both the snap-fit ​​part and the slot part are dovetail-shaped, or round, or triangular.

7. The driving mechanism according to claim 1, characterized in that: The first support frame and the third support frame are connected and fixed together by riveting, welding, threading, or adhesive bonding.

8. The driving mechanism according to claim 3, characterized in that: A reinforcing block is fixedly connected to one side between the first support frame and the third support frame.

9. The driving mechanism according to claim 8, characterized in that: The shape and structure of the reinforcing block are the same as the shape and structure of the corresponding areas on the first support frame and the third support frame.

10. The driving mechanism according to claim 8, characterized in that: The reinforcing block has a perforated hole at the position corresponding to the joint structure.

11. The driving mechanism according to any one of claims 1-10, characterized in that: It also includes an insulating base and a movable shaft. The first support frame, the third support frame, and one end of the movable shaft are injection molded and embedded into the insulating base as a whole.

12. The driving mechanism according to claim 11, characterized in that: The first support frame and the third support frame are connected and fixed together by a joint structure, and the docking position is closed.

13. The driving mechanism according to claim 11, characterized in that: The bottom of the fixed bracket has a clearance hole for the movable shaft to pass through, and the clearance hole is located between the first support frame and the third support frame.

14. The driving mechanism according to claim 11, characterized in that: It also includes a movable contact bridge and an elastic element. The movable contact bridge and the elastic element are installed in a fixed bracket. The movable contact bridge abuts against the inside of the second support frame. The two ends of the elastic element are respectively connected to the movable contact bridge and the insulating base.

15. The actuation mechanism according to claim 14, characterized in that: It also includes an upper magnetic conductor and a lower magnetic conductor. The upper magnetic conductor is fixedly connected to the inner top side of the second support frame and installed above the moving contact bridge, while the lower magnetic conductor is installed on the moving contact bridge.

16. The actuation mechanism according to claim 15, characterized in that: It also includes an insulating cover, a stationary contact, and a yoke plate. The stationary contact is sealed and installed on the top of the insulating cover. The insulating cover is sealed and connected to one side of the yoke plate. A first chamber is formed between the insulating cover and the yoke plate. A fixed bracket is installed in the first chamber. The moving contact bridge and the stationary contact are correspondingly matched.

17. The driving mechanism according to claim 16, characterized in that: The second support frame includes a first support section and two second support sections. The two second support sections are integrally connected to both ends of the first support section along its length and are arranged opposite to each other. The front and rear sides of the two second support sections of the second support frame are provided with arc-shaped ribs. The protrusion direction of the arc-shaped ribs is towards the outside of the fixed bracket. The inner wall of the insulating cover is provided with rib protrusions corresponding to the arc-shaped ribs, which are used to limit the arc-shaped ribs to prevent the fixed bracket from rotating.

18. The driving mechanism according to claim 16, characterized in that: It also includes a metal shell and a coil assembly. The metal shell is sealed and installed on the side of the yoke plate away from the insulating cover. The yoke plate and the metal shell enclose a second chamber. The yoke plate has a through hole. The first chamber and the second chamber are connected to each other through the through hole. A moving iron core is installed in the second chamber. The other end of the movable shaft passes through the through hole into the second chamber and is fixedly connected to the moving iron core. The metal shell is installed inside the coil assembly.

19. A relay, characterized in that: Includes the propulsion mechanism described in any one of claims 1-18.

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