An impact-resistant electromagnetic relay

Abstract

The present invention discloses an impact-resistant electromagnetic relay, comprising a housing, a magnetic circuit part, and a movable spring-armature part. The magnetic circuit part comprises a yoke, a coil frame, and an iron core and an enameled wire arranged on the coil frame. The movable spring-armature part comprises a movable spring and an armature. The coil frame, the yoke, the movable spring, and the armature are assembled together according to a snap-fit ​​structure. The armature and the yoke are matched with a first limiting structure that allows the armature to swing. The first limiting structure limits the movable spring-armature part in a first direction and / or a second direction. The first direction and the second direction are perpendicular to each other and are both perpendicular to the direction where the axis of the iron core is located. When the present invention is subjected to impact vibration, the first limiting structure can be used to form a protective shield for the movable spring-armature part, so that the displacement of the movable spring-armature part relative to the yoke is small, so that the movable contact on the movable spring can be limited within a reasonable space range, ensuring the stability of the mechanical parameter performance of the relay.

Description

Technical Field

[0001] The invention relates to an electromagnetic relay, in particular to an impact-resistant electromagnetic relay. Background Art

[0002] In order to ensure that the movable spring-armature part has reliable movement space in the upper shell, the electromagnetic relay in the prior art has a relatively large design margin for the limit space of the movable spring-armature part inside the relay. This also results in a large movement distance of the movable spring-armature part when the relay is subjected to strong impact and vibration, causing the movable contact on the movable spring to easily exceed a reasonable spatial range, thereby causing the mechanical performance of the relay to be unstable. Summary of the invention

[0003] The purpose of the present invention is to provide an impact-resistant electromagnetic relay capable of improving the mechanical performance stability of the relay in view of the technical problems existing in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an impact-resistant electromagnetic relay, including a shell, a magnetic circuit part, and a movable spring-armature part, the magnetic circuit part includes a yoke, a coil frame, and an iron core and an enameled wire arranged on the coil frame, the movable spring-armature part includes a movable spring and an armature, and the coil frame, the yoke, the movable spring, and the armature are assembled together according to a snap-fit ​​structure; it is characterized in that: the armature and the yoke are equipped with a first limiting structure that allows the armature to swing, and the first limiting structure limits the movable spring-armature part in a first direction and / or a second direction, the first direction and the second direction are perpendicular to each other, and are both perpendicular to the direction where the axis of the iron core is located.

[0005] Furthermore, the first limiting structure includes a first limiting groove provided on the blade of the yoke and a convex bulge provided at the position where the armature cooperates with the blade of the yoke, the convex bulge protrudes toward the yoke and fits in the first limiting groove.

[0006] Furthermore, the first limiting groove is open on a side facing the coil frame, and the first limiting groove is closed on a side facing away from the coil frame.

[0007] Furthermore, the shell is provided with a limiting component, which includes a second limiting structure and / or a third limiting structure, the second limiting structure is used to limit the movement distance of the movable spring armature part in the direction of the core axis, and the third limiting structure limits the magnetic circuit part.

[0008] Furthermore, the second limiting structure includes at least one protrusion, and a gap exists between the protrusion and a side of the armature facing away from the iron core.

[0009] Furthermore, the number of the protrusions is two, one of which is close to one end of the armature that cooperates with the yoke iron edge, and the other protrusion is close to the other end of the armature, and the gap between one protrusion and the armature is smaller than the gap between the other protrusion and the armature.

[0010] Furthermore, the third limiting structure includes a limiting protrusion, which is located on two opposite sides of the coil frame and cooperates with the armature; the third limiting structure also includes a second limiting groove, one end of the yoke is provided with the knife edge, and the other end is connected to a movable spring lead-out pin, and the other end of the yoke and the end of the movable spring lead-out pin are clamped in the second limiting groove, and the second limiting groove is adjacent to a side opening of the limiting protrusion.

[0011] Furthermore, the shell includes a bottom plate and an upper shell, the bottom end of the upper shell is open and connected to the bottom plate, the magnetic circuit part and the movable spring armature part are contained in its shell cavity, and the coil frame lies on the bottom plate, and the limiting component is arranged on the bottom plate.

[0012] Furthermore, the magnetic circuit part also includes an insulating sheet, which is installed on the coil frame and fits between the yoke and the enameled wire.

[0013] Furthermore, the coil frame is provided with two coil lead pins correspondingly connected to the two ends of the enameled wire, and the two coil lead pins are both sheet-shaped and parallel to the axis of the iron core.

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

[0015] 1. Since the armature and the yoke are equipped with a first limiting structure that allows the armature to swing, the first limiting structure limits the movable spring armature part in the first direction and / or the second direction, and the first direction and the second direction are perpendicular to each other and are both perpendicular to the direction where the axis of the iron core is located. When the present invention is subjected to impact vibration, the first limiting structure can be used to form a protective shield for the movable spring armature part, so that the displacement of the movable spring armature part relative to the yoke is small, thereby being able to limit the movable contact on the movable spring within a reasonable spatial range, ensuring the stability of the mechanical parameter performance of the relay.

[0016] 2. The first limiting structure preferably includes the first limiting groove and the convex burl, which can realize the limiting function of the movable spring armature part in the first direction and the second direction at the same time, and has a simple structure and is easy to process.

[0017] 3. The setting of the second limiting structure can ensure that when the present invention is subjected to strong impact vibration, the moving distance of the movable spring armature part in the direction of the axis of the iron core is small and will not exceed the elastic deformation range of the movable spring, thereby further ensuring the stability of the mechanical parameter performance of the relay.

[0018] 4. The setting of the third limiting structure can effectively limit the magnetic circuit part, which is more convenient for product assembly and positioning on the one hand, and can ensure that the magnetic circuit part has stronger impact resistance on the other hand.

[0019] 5. The provision of the insulating sheet can effectively improve the insulation withstand voltage performance of the present invention (the withstand voltage performance of the present invention is improved from 2500V to 4500V).

[0020] 6. Both coil lead pins are sheet-shaped and parallel to the axis of the iron core, which not only increases the creepage distance between the yoke iron surface and the coil lead pins, but also makes the present invention easier to install and remove the insulating sheet, thereby solving the problem of the prior art relay being blocked by the surface where the coil lead pins are located being perpendicular to the axis of the iron core, making it difficult to install and remove the insulating sheet.

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the impact-resistant electromagnetic relay of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a top view of the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention (insulating sheet is pulled out);

[0024] Figure 3 It is a three-dimensional structural schematic diagram of the armature of the present invention;

[0025] Figure 4 It is a three-dimensional structural schematic diagram of the yoke of the present invention;

[0026] Figure 5 It is a three-dimensional schematic diagram of the movable spring armature part and the yoke iron in the matching state of the present invention;

[0027] Figure 6 It is a front view (partial cross-section) of the movable spring armature part and the yoke iron in the matching state of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the base plate of the present invention. DETAILED DESCRIPTION

[0029] For examples, see Figure 1-Figure 7As shown, an impact-resistant electromagnetic relay of the present invention comprises a housing, and a magnetic circuit part, a movable spring armature part, and a static spring part located in the housing. The magnetic circuit part comprises a yoke 2, a coil frame 1, and an iron core and an enameled wire 3 arranged on the coil frame 1. The movable spring armature part comprises a movable spring 5 and an armature 4. The coil frame 1, the yoke 2, the movable spring 5, and the armature 4 are assembled together according to a snap-fit ​​structure. Specifically, the yoke 2 has a three-side structure, one side is riveted to one end of the iron core, and the other two sides are matched to the opposite sides of the coil frame 1, and one end of one of the other two sides is provided with a knife edge, and the other of the other two sides is riveted with a movable spring lead-out pin 10; the armature 4 is located at the other end of the iron core, and one end of the armature 4 is matched at the knife edge of the yoke 2; the movable spring 5 is roughly L-shaped, and one side of it is riveted to the yoke 2 and provided with a movable contact 51, and the other side is riveted to one of the other two sides of the yoke 2. The static spring part is arranged on the coil frame 1 and is matched with the movable spring 5. The armature 4 and the yoke 2 are equipped with a first limiting structure that allows the armature 4 to swing. The first limiting structure limits the movable spring armature part in the first direction and / or the second direction. The first direction and the second direction are perpendicular to each other and are both perpendicular to the direction of the axis of the iron core.

[0030] In this embodiment, the housing is provided with a limiting component, which includes a second limiting structure and a third limiting structure. The second limiting structure is used to limit the moving distance of the movable spring armature part in the direction where the axis of the iron core is located, and the third limiting structure limits the magnetic circuit part. Specifically, the third limiting structure limits the magnetic circuit part in the direction where the axis of the iron core is located and in the first direction. The housing specifically includes a bottom plate 7 and an upper shell (not shown in the figure). The coil frame 1 lies on the bottom plate 7. The bottom end of the upper shell is open and connected to the bottom plate 7, and the magnetic circuit part, the movable spring armature part, and the static spring part are contained in its shell cavity.

[0031] In this embodiment, a coordinate system is set, with the horizontal direction being the X-axis, the vertical direction being the Y-axis, and the vertical direction being the Z-axis. The axis of the core is in the vertical direction, the first direction refers to the horizontal direction, and the second direction refers to the vertical direction. However, it is not limited to this. In other embodiments, the coil frame 1 is placed upright on the bottom plate 7, and the axis of the core is in the vertical direction. The first direction refers to the horizontal direction, and the second direction refers to the vertical direction.

[0032] In this embodiment, the first limiting structure includes a first limiting groove 21 provided on the blade of the yoke 2 and a convex bulge 41 provided at the position where the armature 4 cooperates with the blade of the yoke 2. The convex bulge 41 protrudes toward the yoke 2 and fits in the first limiting groove 21. The first limiting groove 21 is open on one side facing the coil frame 1, and the first limiting groove 21 is closed on the side away from the coil frame 1. In this way, it is easier to insert the convex bulge 41 into the first limiting groove 21 and avoid interference with the swing of the armature 4. There are two first limiting grooves 21 distributed in the longitudinal direction, and there are also two convex bulges 41 distributed in the longitudinal direction. The two first limiting grooves 21 correspond to the two convex bulges 41 one by one.

[0033] In this embodiment, the second limiting structure includes two protrusions 71 and 72, wherein one protrusion 71 is close to one end of the armature 4 that matches with the blade of the yoke 2, and the other protrusion 72 is close to the other end of the armature 4. There is a gap between the two protrusions and the side of the armature 4 away from the iron core, and the gap between one protrusion 71 and the armature 4 is smaller than the gap between the other protrusion 72 and the armature 4. One protrusion 71 is specifically in the shape of a long strip arranged in the transverse direction, and the other protrusion 72 is in the shape of a convex bud.

[0034] In this embodiment, the third limiting structure specifically includes a limiting protrusion 73, and the limiting protrusion 73 and the armature 4 are located on two opposite sides of the coil frame 1 and cooperate with the coil frame 1. Specifically, the limiting protrusion 73 is T-shaped, and its transverse part leans against the side of the coil frame 1, and its longitudinal part is inserted into the coil frame 1. The third limiting structure also includes a second limiting groove 74, one end of the yoke 2 is provided with the knife edge, and the other end (i.e., the ends of the other two sides) is connected to the movable spring lead-out pin 10, and the other end of the yoke 2 and the end of the movable spring lead-out pin 10 are clamped in the second limiting groove 74, and the second limiting groove 74 is adjacent to the opening on one side of the limiting protrusion 73. The second limiting groove 74 is specifically arranged on a square block on the bottom plate 7.

[0035] In this embodiment, the magnetic circuit part further includes an insulating sheet 8, which is inserted into the coil frame 1 and fitted between the yoke 2 and the enameled wire 3. The provision of the insulating sheet 8 can effectively improve the insulation withstand voltage performance of the present invention, specifically, the withstand voltage performance of the present invention is improved from 2500V to 4500V.

[0036] In this embodiment, two coil lead pins 9 corresponding to the two ends of the enameled wire 3 are provided on the coil frame 1. The two coil lead pins 9 are both sheet-shaped and parallel to the axis of the iron core (that is, the surface where the length and width of the coil lead pins 9 are located is parallel to the axis of the iron core). In this way, not only the creepage distance between the yoke iron 2 surface and the coil lead pins 9 is increased, but also the coil lead pins 9 can avoid the insulating sheet 8 when installing and removing the insulating sheet 8 without causing interference, so that the present invention is more convenient for installing and removing the insulating sheet 8. Specifically, the present invention can install and remove the insulating sheet 8 from the side of the coil frame 1 away from the bottom plate 7, thereby solving the problem that the prior art can only install and remove the insulating sheet 8 from the side where the coil frame 1 cooperates with the bottom plate 7, resulting in the inability to install the insulating sheet 8 or the need to modify the assembly process.

[0037] The present invention provides an impact-resistant electromagnetic relay, and the setting of its first limiting structure enables the present invention to use the first limiting structure to form a shield for the movable spring armature part when it is subjected to impact vibration, so that the displacement of the movable spring armature part relative to the yoke iron is small, thereby being able to limit the moving contact on the movable spring within a reasonable spatial range, ensuring the stability of the mechanical parameter performance of the relay. The setting of the second limiting structure can ensure that when the present invention is subjected to strong impact vibration, the moving distance of the movable spring armature part in the direction of the axis of the iron core is small and will not exceed the elastic deformation range of the movable spring, thereby further ensuring the stability of the mechanical parameter performance of the relay. The setting of the third limiting structure can effectively limit the magnetic circuit part, which is more convenient for the assembly and positioning of the product on the one hand, and can ensure that the magnetic circuit part has stronger impact resistance on the other hand.

[0038] The above embodiments are only used to further illustrate an impact-resistant electromagnetic relay 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 impact-resistant electromagnetic relay, comprising a housing, a magnetic circuit part, and a movable spring-armature part, wherein the magnetic circuit part comprises a yoke, a coil frame, and an iron core and an enameled wire arranged on the coil frame, and the movable spring-armature part comprises a movable spring and an armature, and the coil frame, the yoke, the movable spring, and the armature are assembled together in a snap-fit ​​structure; characterized in that: The armature and the yoke are equipped with a first limiting structure that allows the armature to swing, and the first limiting structure limits the movable spring armature part in a first direction and / or a second direction, and the first direction and the second direction are perpendicular to each other and are both perpendicular to the direction where the axis of the iron core is located; The first limiting structure includes a first limiting groove provided on the blade of the yoke and a convex burl provided at the position where the armature and the blade of the yoke cooperate, the convex burl protruding toward the yoke and fitting in the first limiting groove; The first limiting groove is open on a side facing the coil frame, and is closed on a side facing away from the coil frame.

2. The impact-resistant electromagnetic relay according to claim 1, characterized in that: The housing is provided with a limiting component, which includes a second limiting structure and / or a third limiting structure. The second limiting structure is used to limit the moving distance of the movable spring armature part in the direction of the core axis, and the third limiting structure limits the magnetic circuit part.

3. The impact-resistant electromagnetic relay according to claim 2, characterized in that: The second limiting structure includes at least one protrusion, and a gap exists between the protrusion and a side of the armature facing away from the iron core.

4. The impact-resistant electromagnetic relay according to claim 3, characterized in that: There are two protrusions, one of which is close to one end of the armature that cooperates with the yoke iron edge, and the other protrusion is close to the other end of the armature, and the gap between one protrusion and the armature is smaller than the gap between the other protrusion and the armature.

5. The impact-resistant electromagnetic relay according to claim 2, characterized in that: The third limiting structure includes a limiting protrusion, which is located on two opposite sides of the coil frame and cooperates with the armature; the third limiting structure also includes a second limiting groove, one end of the yoke is provided with the knife edge, and the other end is connected to a movable spring lead-out pin, and the other end of the yoke and the end of the movable spring lead-out pin are clamped in the second limiting groove, and the second limiting groove is adjacent to a side opening of the limiting protrusion.

6. The shock-resistant electromagnetic relay according to any one of claims 2 to 5, characterized in that: The shell comprises a bottom plate and an upper shell. The bottom end of the upper shell is open and connected to the bottom plate. The magnetic circuit part and the movable spring armature part are contained in the shell cavity. The coil frame lies on the bottom plate, and the limiting component is arranged on the bottom plate.

7. The impact-resistant electromagnetic relay according to claim 1, characterized in that: The magnetic circuit part also includes an insulating sheet, which is installed on the coil frame and matched between the yoke and the enameled wire.

8. The impact-resistant electromagnetic relay according to claim 1 or 7, characterized in that: The coil frame is provided with two coil lead pins correspondingly connected to the two ends of the enameled wire, and the two coil lead pins are both sheet-shaped and parallel to the axis of the iron core.

Images