Relay

Abstract

The utility model discloses a relay. The relay comprises a coil rack, a housing, an armature and a movable spring, the housing covers the coil rack and is fixedly connected with the coil rack, and a contact space located in the housing is formed above the coil rack; the armature swings up and down in the contact space; the movable spring is provided with a connecting part, a contact part and a bending part, the connecting part is located on the left side of the coil frame and extends in the vertical direction, the contact part is fixedly connected to the upper surface of the armature, and the bending part is connected with the upper end of the connecting part and the left end of the contact part and is bent upwards; the housing is provided with at least two limiting parts which are arranged in the front-back direction, the at least two limiting parts are opposite to the front side and the rear side of the left end of the armature in the up-down direction, and the distances between the at least two limiting parts and the left end of the armature are the same. By adopting the technical scheme, the reliability is higher than that of a relay in the prior art.

Description

Technical Field

[0001] The present application relates to the field of relays, and particularly to a relay resistant to dropping or impact. Background Art

[0002] Refer to Figure 1 and Figure 2 , Figure 1 and Figure 2 which show relay 1 as the prior art of the present application. As Figure 1As shown, the relay 1 in the prior art includes a magnetic circuit part 100, a contact part 200, and a housing 300. Among them, the magnetic circuit part 100 includes a bobbin 110, a coil 120, coil terminals 130, an iron core 140, a yoke 150, and an armature 160. The coil 120 is wound around the bobbin 110, and the winding axis of the coil 120 extends in the up and down direction. The two coil terminals 130 are electrically connected to the coil 120 and both extend downward out of the bobbin 120. The iron core 140 penetrates through the bobbin 110 in the up and down direction. The yoke 150 is provided with a connecting arm 151 and an extending arm 152. The connecting arm 151 is fixedly connected to the lower end of the iron core 140 and extends in the left and right direction. The extending arm 152 is located on the left side of the bobbin 110 and extends upward from the left end of the connecting arm 151. The left end of the armature 160 abuts against the upper end of the extending arm 152, and the armature 160 swings up and down to attract or move away from the upper end of the iron core 140. The contact part 200 includes a moving spring 210 and two static contacts 220. The moving spring 210 is provided with a connecting part 211, a contact part 212, a bending part 213, two moving contact points 214, and a first load terminal 215 that are integrally connected to each other. The connecting part 211 is located on the left side of the bobbin 110 and extends in the up and down direction. The connecting part 211 is fixedly connected to the extending arm 152 and fits against the left side surface of the extending arm 152. The contact part 212 is fixedly connected to the armature 160 and at least partially fits against the upper surface of the armature 160. The bending part 213 connects the upper end of the connecting part 211 and the left end of the contact part 212 and bends upward. The bending part 213 is provided with two bending arms, and the two bending arms are arranged in the front and back direction, and a gap is formed between the adjacent bending arms. The two moving contact points 214 are located at the right end of the contact part 212 and are spaced apart from each other in the up and down direction. The first load terminal 215 extends downward out of the bobbin 110 from the lower end of the connecting part 211. Each static contact 220 is provided with a static contact point 221 and a second load terminal 222. The two static contact points 221 are respectively arranged opposite to the corresponding moving contact points 214 in the up and down direction and are adapted to be closed or separated from the corresponding moving contact points 214 in the up and down direction. The two second load terminals 222 are both located on the right side and are arranged in the front and back direction. Each second load terminal 222 extends downward out of the bobbin 110. The housing 300 covers the bobbin 110 and is fixedly connected to the bobbin 110. A contact space 310 is formed above the bobbin 110 inside the housing 300. The contact space 310 is for the armature 160 to swing up and down therein. In the middle of the inner surface of the top wall of the housing 300 along the front and back direction, a first limiting protrusion 11 is provided. The first limiting protrusion 11 extends into the gap between the two bending arms and is opposite to the middle of the left end of the armature 160 in the front and back direction in the up and down direction. At the central part of the inner surface of the top wall of the housing 300, a second limiting protrusion 12 is provided. The second limiting protrusion 12 is opposite to the middle of the contact part 212 in the up and down direction. The first limiting protrusion 11 and the second limiting protrusion 12 play a certain role in preventing the left end of the armature 160 from moving upward and disengaging from the upper end of the extending arm 152 after the relay 1 falls.

[0003] However, when the above relay 1 drops or is impacted, there is still a certain probability that the relay 1 fails to work. Summary of the Invention

[0004] The purpose of this application is to overcome the above-mentioned defects or problems in the background art and provide a relay with higher reliability compared to the relays in the prior art.

[0005] To achieve the above purpose, the following technical solutions are adopted:

[0006] The first technical solution relates to a relay, which includes a bobbin, a cover, an armature, and a moving spring; the cover covers the bobbin and is fixedly connected to the bobbin, and a contact space located inside the cover is formed above the bobbin; the armature swings up and down in the contact space; the moving spring is provided with a connecting portion, a contact portion, and a bending portion. The connecting portion is located on the left side of the bobbin and extends in the up and down direction. The contact portion is fixedly connected to the upper surface of the armature. The bending portion connects the upper end of the connecting portion and the left end of the contact portion and bends upward; the cover is provided with at least two limiting portions, each limiting portion is arranged in the front and rear direction, and at least two limiting portions are opposite to the front and rear sides of the left end of the armature in the up and down direction and have the same distance from the left end of the armature.

[0007] The second technical solution is based on the first technical solution, wherein the bobbin and the armature are part of the magnetic circuit portion of the relay; the moving spring is part of the contact portion of the relay; the magnetic circuit portion further includes a coil, at least two coil terminals, an iron core, and a yoke. The coil is wound around the bobbin, and the winding axis of the coil extends in the up and down direction. Each coil terminal is electrically connected to the coil and extends downward out of the bobbin. The iron core penetrates the bobbin in the up and down direction. The yoke is provided with a connecting arm and an extending arm. The connecting arm is fixedly connected to the lower end of the iron core. The extending arm is located on the left side of the bobbin and extends upward. The left end of the armature abuts against the upper end of the extending arm and swings up and down to attract or move away from the upper end of the iron core; the contact portion further includes a static contact member. The moving spring is further provided with a first load terminal. The connecting portion is fixedly connected to the extending arm. The right end of the contact portion is provided with a moving contact. The first load terminal extends downward out of the bobbin from the connecting portion. The static contact member is provided with a static contact and a second load terminal. The static contact is adapted to be closed or separated from the moving contact in the up and down direction. The second load terminal extends downward out of the bobbin; at least two limiting portions are respectively located on both sides of the bending portion in the front and rear direction.

[0008] The third technical solution is based on the second technical solution, wherein the number of static contact members is two, the static contacts of the two static contact members are opposite to each other in the up and down direction, and the moving spring is provided with two moving contacts corresponding to the two static contacts respectively.

[0009] The fourth technical solution is based on any one of the first to third technical solutions, wherein at least two bending arms are provided on the bending portion, each bending arm is arranged in the front-rear direction, and an interval is formed between adjacent bending arms; at least one limiting portion extends into the interval in the up-down direction and faces the left end of the armature.

[0010] The fifth technical solution is based on the fourth technical solution, wherein at least one limiting portion extending into the interval faces the middle of the left end of the armature.

[0011] The sixth technical solution is based on any one of the first to third technical solutions, wherein the cover is provided with a rib, and the rib extends in the front-rear direction and is located above the contact portion.

[0012] The seventh technical solution is based on the sixth technical solution, wherein the rib is located above the middle of the contact portion in the left-right direction.

[0013] The eighth technical solution is based on the seventh technical solution, wherein the distance between each limiting portion and the left end of the armature in the up-down direction is less than the distance between the rib and the contact portion in the up-down direction.

[0014] The ninth technical solution is based on any one of the first to third technical solutions, wherein convex blocks protruding upward are provided on both the left and right sides of the bobbin in the front-rear direction, and the armature is located between the two convex blocks in the front-rear direction; at least one of the limiting portions limits the bending portion in the front-rear direction so that the armature cannot contact the convex blocks in the front-rear direction.

[0015] The tenth technical solution is based on the ninth technical solution, wherein two limiting portions located on the front and rear sides of the bending portion and adjacent to the bending portion limit the bending portion in the front-rear direction, and the distance between the two limiting portions and the bending portion in the front-rear direction is less than the distance between the two convex blocks and the armature in the front-rear direction.

[0016] Compared with the prior art, the above solutions have the following beneficial effects:

[0017] After disassembling and analyzing, the applicant found that after the relay in the prior art drops or is impacted, the reason why the moving contact and the static contact may still fail to close or disconnect correctly is that after the drop or impact, the whole formed by the contact part of the moving spring and the armature deflects. This deflection specifically means that the front of the armature is higher than the rear or the front is lower than the rear. This deflection causes the left end of the armature and the top of the extension arm to fail to abut correctly, and the "knife edge" formed by the inclined armature and the top of the extension arm relative to the horizontal plane produces a "gap" in the front-rear direction, thereby greatly reducing the magnetic efficiency of the magnetic circuit part, and further causing the moving contact and the static contact to fail to close or disconnect correctly and effectively, reducing the reliability of the relay. The applicant analyzed in more detail the reason for this deflection and found that during the dropping process, the overall posture of the relay is uncertain. If only the middle part of the left end of the armature is limited by the first limiting protrusion, when the overall posture of the relay is front-low-and-rear-high or front-high-and-rear-low during dropping, the armature may rotate unrestrictedly around the bottom end of the first limiting protrusion after abutting against the first limiting protrusion. When the rotation amplitude is large, one of the two bent arms of the moving spring may undergo plastic deformation, resulting in the fact that after dropping or the impact disappears, the whole formed by the armature and the contact part still cannot correct its posture and forms a deflection.

[0018] In the first technical solution, "at least two limiting parts are opposite to the front and rear sides of the left end of the armature in the up-down direction" means that there is no bent part blocking between the at least two limiting parts and the armature so that the armature is suitable for abutting against the at least two limiting parts upward, and the at least two limiting parts are respectively located above the front and rear sides of the left end of the armature. Since the at least two limiting parts are opposite to the front and rear sides of the left end of the armature in the up-down direction and the distances between the at least two limiting parts and the left end of the armature are the same. Therefore, no matter in what posture the relay drops, after the armature touches the two limiting parts, it cannot deflect, or the deflection is limited to a great extent, making the bent part less likely to undergo plastic deformation due to the unrestricted deflection of the armature compared with the prior art. Finally, after the impact disappears, the bent part restores its deformation to reset the armature to the state where the left end of the armature abuts correctly against the upper end of the extension arm, and it is less likely to produce a "gap". Thus, it is easier to ensure the magnetic efficiency of the magnetic circuit part compared with the prior art, enabling the moving contact and the static contact to close or disconnect correctly and effectively, and improving the reliability of the relay.

[0019] In the second technical solution, at least two limiting parts are respectively located on both sides of the bent part in the front-rear direction, which is a specific implementation manner of the first technical solution.

[0020] The second technical solution and the third technical solution are specific embodiments of the first technical solution. It should be noted that the principle disclosed in this application does not necessarily have to be applied to the relays defined by the second technical solution and the third technical solution. As long as there is objectively a problem of reduced reliability caused by the deflection of the armature in the relays that conform to the first technical solution, the technical means disclosed in this application can be used to solve the problem of armature deflection.

[0021] In the fourth technical solution, the limiting portion extends into the space between adjacent bent arms in the up and down direction, and is used to prevent the armature from deflecting by the combined action of the limiting portion extending into the space and the other limiting portion located on the front and rear sides of the left end of the armature when one of the limiting portions located on the front and rear sides of the left end of the armature can no longer limit the armature in the up and down direction due to the armature moving back and forth under a strong impact in the front and rear direction.

[0022] The fifth technical solution is a specific embodiment of the fourth technical solution.

[0023] In the sixth technical solution and the seventh technical solution, the second limiting protrusion in the prior art is designed as a convex rib extending in the front and rear direction, which can prevent the armature from being twisted as a whole due to the impact while preventing the left end of the armature from deflecting. This is because when the armature is impacted under an uncertain attitude, although based on the first technical solution, it can better ensure that there is no "gap" in the front and rear direction between the left end of the armature and the extension arm compared with the prior art, but if the middle part of the armature in the left and right direction is not limited, it is still possible to cause the armature to twist, resulting in a gap when the armature is attracted to the iron core, leading to low magnetic efficiency, and it is also possible to cause the moving contact and the static contact to fail to close at the preset position, making it easier to generate electric arcs and reducing the service life of the relay. Through the limiting effect of the convex rib extending in the front and rear direction on the contact part, the armature cannot twist around the second limiting protrusion in the prior art, so it is easier to avoid the above-mentioned twisting situation compared with the prior art.

[0024] In the eighth technical solution, the distance between each limiting portion and the left end of the armature in the up and down direction is less than the distance between the convex rib and the contact part in the up and down direction, which can not only ensure the abutment of the left end of the armature and the top of the extension arm first, but also avoid the convex rib interfering with the swing of the armature and the contact part, so that the convex rib only plays a role in limiting the torsion of the armature.

[0025] In the ninth and tenth technical solutions, at least one limiting portion limits the bent portion in the front-rear direction, so that the armature cannot contact the bump in the front-rear direction, which can avoid the plastic deformation of the bent portion when the relay drops with its front and rear sides facing downwards or when the front and rear sides are impacted, resulting in interference between the bump of the bobbin and the armature after the impact. At the same time, it can also better ensure that the position of the moving contact does not move back and forth and can be correctly and effectively closed with the static contact. Therefore, the relays in the ninth and tenth technical solutions have an all-round anti-drop or anti-impact function. Brief Description of the Drawings

[0026] To more clearly illustrate the technical solutions of the embodiments, the drawings required for use are briefly introduced below:

[0027] Figure 1 It is a schematic structural diagram of a relay in the prior art;

[0028] Figure 2 It is a perspective view of the housing of a relay in the prior art;

[0029] Figure 3 It is an exploded perspective view of the relay in the embodiment;

[0030] Figure 4 It is a top view of the relay in the embodiment;

[0031] Figure 5 For Figure 4 Cross-sectional view taken along line A-A of

[0032] Figure 6 It is a perspective view of the housing in the embodiment;

[0033] Figure 7 It is a front view of the relay in the embodiment;

[0034] Figure 8 For Figure 7 Cross-sectional view taken along line B-B of

[0035] Main reference numeral description:

[0036] 1. Relay; 11. First limit projection; 12. Second limit projection; 100. Magnetic circuit part; 110. Coil holder; 111. Bottom plate; 112. Retaining wall; 113. Projection; 120. Coil; 130. Coil terminal; 140. Iron core; 150. Yoke; 151. Connecting arm; 152. Extending arm; 160. Armature; 200. Contact part; 210. Moving spring; 211. Connecting part; 212. Contact part; 213. Bent part; 214. Moving contact; 215. First load terminal; 216. Bent arm; 217. Interval; 220. Fixed contact; 221. Fixed contact point; 222. Second load terminal; 300. Housing; 310. Contact space; 320. Limit part; 321. First limit part; 322. Second limit part; 323. Third limit part; 330. Rib. Detailed implementation manner

[0037] In the claims and the specification, unless otherwise defined, the terms "first", "second", "third", etc. are used to distinguish different objects rather than to describe a specific order.

[0038] In the claims and the specification, unless otherwise defined, the orientation or positional relationship indicated by the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. is based on the orientation and positional relationship shown in the drawings, and is only for the convenience of simplified description, rather than implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation.

[0039] In the claims and the specification, unless otherwise defined, the term "fixed connection" or "fixedly connected" should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-removable fixed connection, removable fixed connection, being integrally connected, and being fixedly connected through other devices or elements.

[0040] In the claims and the specification, unless otherwise defined, the terms "comprising", "having" and their variants mean "including but not limited to".

[0041] In the claims and the specification, unless otherwise defined, the term "provided with" means that the technical feature located behind it is a part of the technical feature located in front of it.

[0042] In the claims and the specification, unless otherwise defined, the term "opposite" means that there is no other object or component between the two.

[0043] Next, the technical solutions in the embodiments will be clearly and completely described in conjunction with the drawings.

[0044] See Figures 3 to 5 , Figures 3 to 5 which shows the relay 1 in the embodiment. As Figure 3 shown, the relay 1 includes a magnetic circuit part 100, a contact part 200 and a housing 300.

[0045] As Figure 3 and Figure 5 shown, the magnetic circuit part 100 includes a bobbin 110, a coil 120, coil terminals 130, an iron core 140, a yoke 150 and an armature 160. The bobbin 110 is provided with a bottom plate 111, two retaining walls 112, a shaft body and bumps 113. The bottom plate 111 is located below the two retaining walls 112. The two retaining walls 112 are arranged in the up and down direction and are both perpendicular to the up and down direction. The shaft body connects the two retaining walls 112 and is provided with a shaft hole penetrating in the up and down direction. There are two bumps 113. The two bumps 113 are arranged in the front and back direction and both protrude upward from the retaining wall 112 located above. The coil 120 is wound around the shaft body of the bobbin 110, and the winding axis of the coil 120 extends in the up and down direction. The two coil terminals 130 are electrically connected to the coil 120 and both extend downward from the bottom plate 111 of the bobbin 110. The two coil terminals 130 are both located on the left side of the relay 1 and are arranged in the front and back direction. The iron core 140 penetrates the shaft hole of the bobbin 110 in the up and down direction. The yoke 150 is provided with a connecting arm 151 and an extending arm 152. The connecting arm 151 extends in the left and right direction and extends into the space between the bottom plate 111 and the retaining wall 112 located below to be fixedly connected to the lower end of the iron core 140. The extending arm 152 is located on the left side of the bobbin 110 and extends upward from the left end of the connecting arm 151. The left end of the armature 160 abuts against the upper end of the extending arm 152. The armature 160 swings up and down to attract or move away from the upper end of the iron core 140. The middle and right parts of the armature 160 in the left and right direction are both located between the two bumps 113, and there is a distance between the two bumps 113 and the armature 160 in the front and back direction. In this embodiment, the distance between the two bumps 113 and the armature 160 in the front and back direction is equal.

[0046] As Figure 3 and Figure 5As shown, the contact portion 200 includes a movable spring 210 and two stationary contacts 220. The movable spring 210 is provided with a connecting portion 211, a contact portion 212, a bending portion 213, two movable contacts 214 and a first load terminal 215 which are connected to each other as a whole. The connecting portion 211 is located on the left side of the coil frame 110 and extends in the up-down direction. The connecting portion 211 is fixedly connected to the extension arm 152 and fits the left side surface of the extension arm 152. The contact portion 212 is fixedly connected to the armature 160 and at least partially fits the upper surface of the armature 160. The bending portion 213 connects the upper end of the connecting portion 211 and the left end of the contact portion 212 and is bent upward. The bending portion 213 is provided with two bending arms 216, and the two bending arms 216 are arranged in the front-to-back direction, and a gap 217 is formed between adjacent bending arms 216. The two movable contacts 214 are located at the right end of the contact portion 212 and are separated from each other in the up-down direction. The first load terminal 215 extends downward from the bottom end of the connecting portion 211 to the bottom plate 111 of the coil frame 110. The first load terminal 215 is located on the left side of each coil terminal 130 and is located in the middle along the front-to-back direction. Each static contact 220 is provided with a static contact 221 and a second load terminal 222. The two static contacts 221 are respectively arranged opposite to the corresponding moving contact 214 in the up-down direction and are suitable for the corresponding moving contact 214 to close or move away in the up-down direction. The two second load terminals 222 are both located on the right side and arranged in the front-to-back direction. Each second load terminal 222 extends downward from the bottom plate 111 of the coil frame 110.

[0047] See also Figures 5 to 8 , Figures 5 to 8 FIG. 3 shows a cover 300 in this embodiment. Figure 5 As shown, the cover 300 is covered on the coil frame 110 and fixed to the coil frame 110. A contact space 310 is formed between the cover 300 and the coil frame 110. The contact space 310 is located inside the cover 300 and above the coil frame 110. The contact space 310 is for the armature 160 to swing up and down. Figure 6 and Figure 8As shown, on the left side of the inner surface of the top wall of the housing 300, there are three limiting portions 320. The three limiting portions 320 are all connected to the inner surface of the left side wall of the housing 300 and are trapezoidal. The three limiting portions 320 are arranged in the front-rear direction. The three limiting portions 320 are respectively a first limiting portion 321, a second limiting portion 322, and a third limiting portion 323. The first limiting portion 321 and the second limiting portion 322 are opposite to the front and rear sides of the armature 160 in the up-down direction and are respectively located on both sides of the bent portion 213 in the front-rear direction. The first limiting portion 321 and the second limiting portion 322 limit the bent portion 213 in the front-rear direction, and the distances between the first limiting portion 321 and the second limiting portion 322 and the bent portion 213 are both smaller than the distances between the two bumps 113 and the armature 160. In this embodiment, in the front-rear direction, the distances between the first limiting portion 321 and the second limiting portion 322 and the bent portion 213 are equal. The third limiting portion 323 extends into the space 217 in the up-down direction and is opposite to the middle part of the left end of the armature 160 in the front-rear direction. In this embodiment, the distances between the three limiting portions 320 and the left end of the armature 160 are equal. As Figure 6 and Figure 8 shown, in the middle of the inner surface of the top wall of the housing 300 in the left-right direction, there is a rib 330 extending in the front-rear direction. The rib 330 protrudes from the inner surface of the top wall of the housing 300. The rib 330 is located above the middle part of the contact portion 212 in the left-right direction. There is a distance between the rib 330 and the contact portion 212 in the up-down direction. As Figure 5 shown, in this embodiment, when the two coil terminals 130 of the relay 1 are not externally connected to an external signal circuit or the external signal circuit is not energized, the upper moving contact 214 is closed with the upper stationary contact 221, and the lower moving contact 214 is disconnected from the lower stationary contact 221. In this state, in the up-down direction, the distance between each limiting portion 320 and the left end of the armature 160 is smaller than the distance between the rib 330 and the contact portion 212. When the external signal circuit is electrically connected to the two coil terminals 130 and energized, the armature 160 attracts the upper end of the iron core 140, the bent portion 213 elastically deforms, the lower moving contact 214 is closed with the lower stationary contact 221, and the upper moving contact 214 is disconnected from the upper stationary contact 221 until the external signal circuit is no longer energized, the bent portion 213 restores its deformation, and the relay 1 returns to the initial state as Figure 5 shown.

[0048] In this embodiment, since the first limiting portion 321 and the second limiting portion 322 are opposite to the front and rear sides of the left end of the armature 160 in the up-down direction and the distances between the first limiting portion 321 and the second limiting portion 322 and the left end of the armature 160 are the same. Therefore, no matter in what posture the relay 1 drops, after the armature 160 touches the two limiting portions 320, it cannot deflect, or the deflection is greatly restricted, making the bent portion 213 less likely to plastically deform due to the unrestricted deflection of the armature 160 compared with the prior art. Finally, after the impact disappears, the bent portion 213 restores its deformation to reset the armature 160 to the state where the left end of the armature 160 is correctly abutted against the upper end of the extension arm 152, and it is less likely to produce a "notch" compared with the prior art. Thus, it is easier to ensure the magnetic efficiency of the magnetic circuit part 100, enabling the moving contact 214 and the static contact 221 to be correctly and effectively closed or disconnected, and improving the reliability of the relay 1.

[0049] In this embodiment, the third limiting portion 323 extends into the gap 217 between the adjacent bent arms 216 in the up-down direction, and is used to prevent the armature 160 from deflecting by jointly acting with the other limiting portion 320 located on the front and rear sides of the left end of the armature 160 through the third limiting portion 323 when one of the first limiting portion 321 and the second limiting portion 322 can no longer limit the armature 160 in the up-down direction due to the strong impact on the armature 160 in the front-rear direction and the armature 160 moves back and forth.

[0050] In this embodiment, the convex rib 330 extending in the front-rear direction can prevent the armature 160 from being twisted as a whole due to the impact while the limiting portion 320 prevents the left end of the armature 160 from deflecting. Through the limiting effect of the convex rib 330 extending in the front-rear direction on the contact portion 212 when it moves upward under the impact, the armature 160 is more likely to avoid the occurrence of torsion compared with the prior art.

[0051] In this embodiment, the distance between each limiting portion 320 and the left end of the armature 160 in the up-down direction is less than the distance between the convex rib 330 and the contact portion 212 in the up-down direction, which can not only ensure the abutment between the left end of the armature 160 and the top end of the extension arm 152 first, but also avoid the convex rib 330 interfering with the swing of the armature 160 and the contact portion 212, so that the convex rib 330 only plays the role of limiting the torsion of the armature 160.

[0052] In this embodiment, the first limiting portion 321 and the second limiting portion 322 limit the bent portion 213 in the front-rear direction, so that the armature 160 cannot contact the bump 113 in the front-rear direction. This can prevent the bent portion 213 from undergoing plastic deformation when the relay 1 drops with its front and rear sides facing downwards or when the front and rear sides are impacted, resulting in interference between the bump 113 of the bobbin 110 and the armature 160 after the impact. At the same time, it can better ensure that the position of the moving contact 214 will not move back and forth and can be correctly and effectively closed with the static contact 221. Therefore, the relay in this embodiment has an all-directional anti-drop or anti-impact function.

[0053] The above description of the specification and embodiments is used to explain the protection scope of the present application, but does not constitute a limitation on the protection scope of the present application.

Claims

1. A relay, which includes a bobbin (110), a cover (300), an armature (160) and a moving spring (210); the cover (300) covers the bobbin (110) and is fixedly connected to the bobbin (110), and a contact space (310) located inside the cover (300) is formed above the bobbin (110); the armature (160) swings up and down in the contact space; the moving spring (210) is provided with a connecting portion (211), a contact portion (212) and a bending portion (213), the connecting portion (211) is located on the left side of the bobbin (110) and extends in the up and down direction, the contact portion (212) is fixedly connected to the upper surface of the armature (160), and the bending portion (213) connects the upper end of the connecting portion (211) and the left end of the contact portion (212) and bends upward; It is characterized in that The cover (300) is provided with at least two limiting portions (320), each limiting portion (320) is arranged in the front and back direction, and the at least two limiting portions (320) are opposite to the front and back sides of the left end of the armature (160) in the up and down direction and have the same distance from the left end of the armature (160).

2. A relay according to claim 1, characterized in that The bobbin (110) and the armature (160) are part of the magnetic circuit portion (100) of the relay (1); the moving spring (210) is part of the contact portion (200) of the relay (1); The magnetic circuit portion (100) further includes a coil (120), at least two coil terminals (130), an iron core (140) and a yoke (150), the coil (120) is wound around the bobbin (110), the winding axis of the coil (120) extends in the up and down direction, each coil terminal (130) is electrically connected to the coil (120) and extends downward out of the bobbin (110), the iron core (140) penetrates the bobbin (110) in the up and down direction, the yoke (150) is provided with a connecting arm (151) and an extending arm (152), the connecting arm (151) is fixedly connected to the lower end of the iron core (140), the extending arm (152) is located on the left side of the bobbin (110) and extends upward, and the left end of the armature (160) abuts against the upper end of the extending arm (152) and swings up and down to attract or move away from the upper end of the iron core (140); The contact portion (200) further includes a static contact member (220), the moving spring (210) is further provided with a first load terminal (215), the connecting portion (211) is fixedly connected to the extending arm (152), the right end of the contact portion (212) is provided with a moving contact (214), the first load terminal (215) extends downward out of the bobbin (110) from the connecting portion (211), the static contact member (220) is provided with a static contact (221) and a second load terminal (222), the static contact (221) is adapted to be closed or separated from the moving contact (214) in the up and down direction, and the second load terminal (222) extends downward out of the bobbin (110); At least two limiting parts (320) are respectively located on both sides of the bending part (213) in the front-rear direction.

3. A relay according to claim 2, characterized in that, The number of the static contact pieces (220) is two. The static contact points (221) of the two static contact pieces (220) are opposite to each other in the up-down direction. The moving spring (210) is respectively provided with two moving contact points (214) corresponding to the two static contact points (221).

4. A relay according to any one of claims 1 to 3, characterized in that, The bending part (213) is provided with at least two bending arms (216). Each bending arm (216) is arranged in the front-rear direction, and an interval (217) is formed between adjacent bending arms (216); at least one limiting part (320) extends into the interval (217) in the up-down direction and is opposite to the left end of the armature (160).

5. A relay according to claim 4, characterized in that, At least one limiting part (320) extending into the interval (217) is opposite to the middle part of the left end of the armature (160).

6. A relay according to any one of claims 1 to 3, characterized in that, The housing (300) is provided with a rib (330). The rib (330) extends in the front-rear direction and is located above the contact part (212).

7. A relay according to claim 6, characterized in that, The rib (330) is located above the middle part of the contact part (212) in the left-right direction.

8. A relay according to claim 7, characterized in that, The distance between each limiting part (320) and the left end of the armature (160) in the up-down direction is less than the distance between the rib (330) and the contact part (212) in the up-down direction.

9. A relay according to any one of claims 1 to 3, characterized in that, On both the left and right sides of the coil bobbin (110) in the front-rear direction, there are upward protruding bumps (113). The armature (160) is located between the two bumps (113) in the front-rear direction; at least one of the limiting parts (320) limits the bending part (213) in the front-rear direction, so that the armature (160) cannot contact the bump (113) in the front-rear direction.

10. A relay according to claim 9, characterized in that, Two limiting parts (320) located on the front and rear sides of the bending part (213) and adjacent to the bending part (213) limit the bending part (213) in the front-rear direction, and the distance between the two limiting parts (320) and the bending part (213) in the front-rear direction is less than the distance between the two bumps (113) and the armature (160) in the front-rear direction.

Images