An electromagnetic relay with exhaust function

Abstract

The present invention discloses an electromagnetic relay with an exhaust function, comprising a housing with an open bottom end, a base plate, and a core. The bottom end of the housing is connected to the base plate, and the two define a cavity for accommodating the core. The base plate is provided with a downwardly extending hollow exhaust column, the hollow inner cavity of which constitutes an exhaust passage and communicates with the cavity. When the present invention is applied to a power control board, the exhaust column can be sealed downwardly through the circuit board of the power control board and open to the outside world. Therefore, when applied to the power control board, the exhaust column not only retains the exhaust function, solving the problem that the existing base plate exhaust holes are difficult to mate with the circuit board and base plate of the power control board, but also prevents glue filled inside the power control board from entering the interior of the electromagnetic relay.

Description

Technical Field

[0001] The present invention relates to an electromagnetic relay, in particular to an electromagnetic relay with an exhaust function. Background Art

[0002] Currently, most existing electromagnetic relays have vents on their housings or baseplates to vent metal vapor generated during operation, preventing it from accumulating and affecting its performance. When used in power control boards, the electromagnetic relays often require glue to improve their insulation and service life. If the electromagnetic relay housing has vents, the glue can enter the electromagnetic relay through these vents during glue filling, rendering the relay useless. Furthermore, vents on the baseplate of the electromagnetic relay make it difficult to connect and seal with the circuit board and baseplate of the power control board. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the prior art and provides an electromagnetic relay applicable to a power control panel and having an exhaust function.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an electromagnetic relay with an exhaust function, including a shell with an opening at the bottom, a base plate, and a core body, the bottom end of the shell is connected to the base plate, and the two form a cavity for accommodating the core body; the base plate is provided with a hollow exhaust column extending downward, the hollow inner cavity of the exhaust column constitutes an exhaust channel, and is connected to the cavity.

[0005] Furthermore, the core body includes a yoke, an armature, a coil frame, a movable spring, a static spring, and an iron core and an enameled wire arranged on the coil frame. The coil frame, the yoke, the movable spring, and the armature are assembled together according to a snap-fit ​​structure. The static spring is installed on the coil frame and cooperates with the movable spring. A first limiting structure is provided on the base plate to limit the moving distance of the armature in the swinging direction or the axial direction of the iron core and the moving distance of the armature in its length direction.

[0006] Furthermore, the first limiting structure includes a first limiting boss, which is in a U-shape, and the middle part of the first limiting boss is matched with the side of the armature away from the iron core, and the two end parts of the first limiting boss are matched with the two sides of the armature in the length direction.

[0007] Furthermore, a second limiting structure is provided on the inner wall of the shell to limit the moving distance of the armature in the swinging direction or the axial direction of the iron core and the moving distance of the armature in its length direction.

[0008] Furthermore, the second limiting structure has the same structure as the first limiting structure.

[0009] Furthermore, a positioning piece is provided on the coil frame to limit the swing distance of the movable spring. The positioning piece is located on a side of the movable spring away from the static spring and corresponds to the movable contact on the movable spring.

[0010] Furthermore, the bottom plate and the shell are fixed by gluing, and glue grooves are provided around the bottom edge of the bottom plate.

[0011] Furthermore, the cross section of the glue dispensing groove is L-shaped, and the vertical portion of the glue dispensing groove is away from the edge of the bottom plate, and the horizontal portion constitutes the glue dispensing surface.

[0012] Furthermore, the glue dispensing surface is provided with a guiding slope for facilitating the glue to flow to the gap between the bottom plate and the shell.

[0013] Furthermore, the diameter of the exhaust passage gradually increases or decreases from top to bottom.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Since the bottom plate is provided with a hollow exhaust column extending downward, the hollow inner cavity of the exhaust column constitutes an exhaust channel and is connected to the cavity. Therefore, when the present invention is applied to the power control board, the exhaust column can be sealed downward through the circuit board of the power control board and lead to the outside world. Therefore, when the present invention is applied to the power control board, not only the exhaust function is retained by utilizing the exhaust column, but also the problem that the exhaust holes of the existing bottom plate are inconvenient to cooperate with the circuit board and bottom plate of the power control board is solved, and the glue filled in the power control board can be prevented from entering the interior of the electromagnetic relay.

[0016] 2. The base plate is further provided with the first limiting structure, which can form a protective shield for the armature when the present invention is subjected to impact vibration, so that the offset of the armature relative to the yoke is smaller, thereby limiting the moving contact on the moving spring to a reasonable spatial range, ensuring the stability of the mechanical parameter performance of the relay and improving the anti-drop performance of the relay.

[0017] 3. The first limiting structure preferably includes the first limiting boss, and the first limiting boss is in a U-shape, which has the characteristics of simple structure and convenient production.

[0018] 4. The second limiting structure is provided on the inner wall of the housing to limit the armature simultaneously with the first limiting structure, which can more effectively limit the displacement of the armature when the present invention is subjected to impact vibration, thereby further improving the stability of the mechanical parameter performance of the relay.

[0019] 5. The dispensing groove can prevent glue overflow and improve glue utilization. In particular, the dispensing surface of the dispensing groove is provided with a guiding slope to facilitate the flow of glue to the gap between the base plate and the shell. This can effectively improve the bonding strength between the base plate and the shell, and prevent the risk of product leakage or poor bonding strength between the base plate and the shell due to glue not flowing properly.

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the electromagnetic relay with exhaust function of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a top view of the present invention;

[0022] Figure 2 It is an AA cross-sectional view of the present invention;

[0023] Figure 3 It is a BB cross-sectional view of the present invention;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the core of the present invention;

[0025] Figure 5 is a cross-sectional view of the core of the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the base plate of the present invention. Figure 1 (bottom side up);

[0027] Figure 7 is a cross-sectional view of the base plate of the present invention (bottom side facing upward);

[0028] Figure 8 This is a schematic diagram of the three-dimensional structure of the base plate of the present invention. Figure 2 (top side facing up);

[0029] Figure 9 It is a schematic diagram of the three-dimensional structure of the core and the base plate of the present invention in a mating state;

[0030] Figure 10 It is a schematic diagram of the three-dimensional structure of the core and the shell in the mating state of the present invention;

[0031] Figure 11 It is a structural diagram of the power control board;

[0032] Figure 12 It is a cross-sectional view of the power control board;

[0033] Figure 13 yes Figure 12 Enlarged schematic diagram of part C. DETAILED DESCRIPTION

[0034] For examples, see Figures 1-13 As shown, the electromagnetic relay with exhaust function of the present invention comprises a housing 1 with an opening at the bottom, a bottom plate 2, and a core. The bottom end of the housing 1 is connected to the bottom plate 2, and the two form a cavity for accommodating the core. Figure 2-Figure 5 As shown, the core body includes a yoke 5, an armature 3, a coil frame 6, a movable spring 4, a static spring 9, and an iron core 8 and an enameled wire 7 arranged on the coil frame 6. The coil frame 6, the yoke 5, the movable spring 4, and the armature 3 are assembled together according to a snap-fit ​​structure. The static spring 9 is installed on the coil frame 6 and cooperates with the movable spring 4.

[0035] In this embodiment, Figure 6 、 Figure 7 As shown, the bottom plate 2 is provided with a hollow exhaust column 22 extending downward. The hollow interior of the exhaust column 22 forms an exhaust channel 221, which communicates with the mold cavity. The diameter of the exhaust channel 221 gradually increases from top to bottom, but this is not limiting. In other embodiments, the diameter of the exhaust channel 221 gradually decreases from top to bottom. The diameter of the exhaust channel 221 is configured to gradually increase or decrease from top to bottom to facilitate injection molding and demolding.

[0036] In this embodiment, Figure 6 、 Figure 7 As shown, the base plate 2 and the shell 1 are specifically fixed by glue, and a glue dispensing groove 23 is provided around the bottom edge of the base plate 2. The cross section of the glue dispensing groove 23 is L-shaped, and the vertical part of the glue dispensing groove 23 is away from the edge of the base plate 2, and the horizontal part constitutes a glue dispensing surface 231, and the glue dispensing surface 231 is provided with a guide slope for facilitating the flow of glue to the gap between the base plate 2 and the shell 1. The width of the guide slope is 1.2mm and the depth (i.e., the height difference between the two ends of the guide slope) is 0.1mm. The setting of the glue dispensing groove 23 can avoid glue overflow and improve the utilization rate of glue. In particular, the guide slope provided on the glue dispensing surface 231 of the glue dispensing groove 23 can divert the glue to the gap between the base plate 2 and the shell 1, thereby effectively improving the bonding strength between the base plate 2 and the shell 1, and preventing the risk of product leakage or poor bonding strength between the base plate 2 and the shell 1 due to the glue not flowing into place.

[0037] In this embodiment, Figure 8 、 Figure 9 As shown, the base plate 2 is provided with a first limiting structure to limit the movement distance of the armature 3 in the swing direction and the movement distance of the armature 3 in its longitudinal direction. The first limiting structure specifically includes a first limiting boss 21. The first limiting boss 21 is U-shaped, with an inclined middle portion (the inclination direction of the middle portion of the first limiting boss 21 is adapted to the swing direction of the armature 3) and engages with the side of the armature 3 facing away from the iron core 8. The end portions of the first limiting boss 21 engage with the two sides of the armature 3 in the longitudinal direction.

[0038] In this embodiment, the inner wall of the housing 1 is provided with a second limiting structure to limit the moving distance of the armature 3 in the swing direction and the moving distance of the armature 3 in its length direction. The second limiting structure specifically includes a second limiting boss 11, such as Figure 10 As shown, it has the same structure as the first limiting boss 21, and the two are basically symmetrically distributed on both sides of the width direction of the armature 3, as shown in FIG. Figure 2 、 Figure 3 The first limiting boss 21 and the second limiting boss 11 simultaneously limit the armature 3, so that when the present invention is subjected to impact vibration, the displacement of the armature 3 can be more effectively limited, thereby ensuring the stability of the mechanical parameter performance of the relay and improving the anti-drop performance of the relay.

[0039] In this embodiment, an L-shaped positioning piece 10 is provided on the coil frame 6 to limit the swing distance of the movable spring 4. The positioning piece 10 is located on the side of the movable spring 4 away from the static spring 9 and corresponds to the movable contact 41 on the movable spring 4. Figure 5 As shown, when the present invention is subjected to impact vibration, the displacement of the dynamic spring 4 in the swing direction can be effectively limited, thereby further improving the stability of the mechanical parameter performance of the relay.

[0040] An electromagnetic relay with an exhaust function of the present invention, when applied to a power control board 20 (the power control board 20 includes an upper shell 201 with an opening at the bottom end, a bottom plate 202, and a circuit board 203, the circuit board 203 is fixed to the top surface of the bottom plate 202, and the bottom plate 202 is connected to the bottom end of the upper shell 201), before the power control board 20 is filled with glue, the pins of the present invention are soldered to the circuit board 203 of the power control board 20, the exhaust column 22 on the bottom plate 2 of the present invention is passed downward through the circuit board 203 of the power control board 20, and inserted into the corresponding through hole 2021 provided on the bottom plate 202, and at the same time, a sealing ring 30 or other components with a sealing function are used to effectively seal the gap between the exhaust column 22 and the circuit board 203 of the power control board 20, such as Figure 11-13 Obviously, when the present invention is applied to the power control board 20, the exhaust channel 221 of the exhaust column 22 remains in communication with the outside world, thus retaining the exhaust function of the present invention. In addition, the present invention solves the problem that the existing bottom plate exhaust holes are not convenient for matching with the circuit board and bottom plate of the power control board, and also avoids the harmful effects of glue filled in the power control board entering the interior of the electromagnetic relay.

[0041] The above embodiments are only used to further illustrate an electromagnetic relay with exhaust function of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the technical solution of the present invention.

Claims

1. An electromagnetic relay with an exhaust function, comprising a housing with an open bottom, a base plate, and a core, wherein the bottom end of the housing is connected to the base plate, and the two form a cavity for accommodating the core; characterized in that: The bottom plate is provided with a hollow exhaust column extending downward, the hollow inner cavity of the exhaust column constitutes an exhaust channel, which is used to discharge the gas generated inside the electromagnetic relay when it is working and is connected to the cavity; the electromagnetic relay is applied to the power control board, and the exhaust column is sealed downward through the circuit board of the power control board and leads to the outside world.

2. The electromagnetic relay with exhaust function according to claim 1, characterized in that: The core body includes a yoke, an armature, a coil frame, a movable spring, a static spring, and an iron core and an enameled wire arranged on the coil frame. The coil frame, the yoke, the movable spring, and the armature are assembled together according to a snap-fit ​​structure. The static spring is installed on the coil frame and cooperates with the movable spring. A first limiting structure is provided on the bottom plate to limit the moving distance of the armature in the swinging direction or the axial direction of the iron core and the moving distance of the armature in its length direction.

3. The electromagnetic relay with exhaust function according to claim 2, characterized in that: The first limiting structure includes a first limiting boss, which is in a U-shape, and the middle portion of the first limiting boss is matched with the side of the armature away from the iron core, and the two end portions of the first limiting boss are matched with the two sides of the armature in the length direction.

4. The electromagnetic relay with exhaust function according to claim 2 or 3, characterized in that: The inner wall of the shell is provided with a second limiting structure to limit the movement distance of the armature in the swing direction or the axial direction of the iron core and the movement distance of the armature in its length direction.

5. The electromagnetic relay with exhaust function according to claim 4, characterized in that: The second limiting structure has the same structure as the first limiting structure.

6. The electromagnetic relay with exhaust function according to claim 2, characterized in that: A positioning piece is provided on the coil frame to limit the swing distance of the movable spring. The positioning piece is located on a side of the movable spring away from the static spring and corresponds to the movable contact on the movable spring.

7. The electromagnetic relay with exhaust function according to claim 1, characterized in that: The bottom plate and the shell are fixed by gluing, and glue grooves are arranged around the bottom edge of the bottom plate.

8. The electromagnetic relay with exhaust function according to claim 7, characterized in that: The cross section of the glue dispensing groove is L-shaped, and the vertical portion of the glue dispensing groove is away from the edge of the bottom plate, and the horizontal portion constitutes the glue dispensing surface.

9. The electromagnetic relay with exhaust function according to claim 8, characterized in that: The glue dispensing surface is provided with a guiding inclined surface for facilitating the glue to flow to the gap between the bottom plate and the shell.

10. The electromagnetic relay with exhaust function according to claim 1, characterized in that: The diameter of the exhaust passage gradually increases or decreases from top to bottom.

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