A shock-resistant electromagnetic relay

Abstract

The present invention discloses an impact-resistant electromagnetic relay, comprising a base, a magnetic circuit portion, and a contact portion. The magnetic circuit portion is horizontal and includes a yoke, an armature, an iron core, a coil frame mounted on the base, and an enameled wire disposed on the coil frame. One axial end of the coil frame is provided with two coil lead terminals electrically connected to the enameled wire, and the two coil lead terminals respectively extend through the base. The other axial end of the coil frame is provided with a first fixing portion facing the base, and the first fixing portion is fixedly connected to the base. When the coil frame of the present invention is provided with the first fixing portion, the other axial end of the coil frame will not float when subjected to impact vibration, thereby improving the mechanical stability of the magnetic circuit portion and the stability and reliability of product parameters.

Description

Technical Field

[0001] The present invention relates to the field of relays, and in particular to an impact-resistant electromagnetic relay. Background Art

[0002] A relay is an electronic control device commonly used in automatic control circuits. It effectively acts as an "automatic switch" that uses a smaller current to control a larger one. Therefore, it performs functions such as automatic regulation, safety protection, and circuit switching within the circuit. The mechanical stability of the relay's internal magnetic circuit system is crucial to the stability and reliability of the product's parameters.

[0003] One type of magnetic circuit system in the prior art is a horizontal electromagnetic relay, in which the coil frame of the magnetic circuit system is fixed on one side only by inserting the coil lead terminal provided at one axial end into the base. With this fixing method, when the product is subjected to impact or vibration, the other axial end of the coil frame will float, causing the product parameters to change and fail. Summary of the Invention

[0004] The present invention aims at solving the technical problems in the prior art and provides an impact-resistant electromagnetic relay.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an impact-resistant electromagnetic relay, including a base, a magnetic circuit part, and a contact part. The magnetic circuit part is horizontal and includes a yoke, an armature, an iron core, a coil frame mounted on the base, and an enameled wire arranged on the coil frame. One axial end of the coil frame is provided with two coil lead terminals electrically connected to the enameled wire, and the two coil lead terminals respectively pass through the base; the other axial end of the coil frame is provided with a first fixing portion facing the base, and the first fixing portion is fixedly connected to the base.

[0006] Furthermore, the first fixing portion is inserted into the first insertion hole provided on the base, and the two are fixed by gluing.

[0007] Furthermore, the coil lead terminals are respectively inserted into the base, or one axial end of the coil frame is provided with a second fixing portion facing the base, and the second fixing portion is fixedly connected to the base.

[0008] Furthermore, the second fixing portion is inserted into the second insertion hole provided on the base, and the two are fixed by gluing.

[0009] Furthermore, the number of the second fixing parts is two, corresponding one to one to the two coil lead-out terminals, and each coil lead-out terminal is respectively arranged on a corresponding second fixing part.

[0010] Furthermore, the second fixing part is a hollow structure with an open bottom end, and the top of each coil lead-out terminal is respectively fixed in the corresponding second fixing part, and each coil lead-out terminal partially extends out of the second fixing part through a clearance opening provided on the side of the second fixing part, and is electrically connected to the enameled wire and interference fits with the base.

[0011] Furthermore, the contact part includes a dynamic spring and a static spring, the static spring is installed on the base and cooperates with the dynamic spring; the coil frame, yoke, iron core, dynamic spring, and armature are assembled together according to a snap-fit structure; the yoke is L-shaped, one side of which cooperates with the upper side of the coil frame and is connected to the dynamic spring, and the other side is connected to one end of the iron core; it also includes a dynamic spring lead-out terminal, which is in a U-shape, the top of which is electrically connected to the other side of the yoke, the middle part of which is located below the enameled wire and extends toward the other axial end of the coil frame, and the bottom of which passes downward through the third socket provided on the base and is interference fit with the third socket.

[0012] Furthermore, the dynamic spring includes a first sheet body that cooperates with the armature, a second sheet body that cooperates with the yoke, and a bending portion arranged between the first sheet body and the second sheet body. The bending portion is hollow and arched, and the action point of the second sheet body on the yoke does not coincide with the fixed point, and is staggered in the width direction of the yoke.

[0013] Furthermore, the bending portion includes a plurality of long strips arranged in parallel and spaced apart, one end of each long strip being integrally connected to the first sheet body, and the other end of each long strip being integrally connected to the second sheet body, and each long strip being arched and in a bow shape.

[0014] Furthermore, the second sheet includes a force-reinforcing portion and a fixed portion, the other end of each long sheet and the fixed portion are respectively integrally connected to the force-reinforcing portion, and each long sheet and the fixed portion are located on the same side of the force-reinforcing portion; the action force point of the second sheet on the yoke is located at the force-reinforcing portion, and the fixed point of the second sheet on the yoke is located at the fixed portion.

[0015] Furthermore, the fixing portion is located in the middle of one side of the supporting portion, and the fixing portion and the supporting portion form a T-shape or a mountain shape; the number of the long strips is two, and the two long strips are located on two opposite sides of the fixing portion.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The other axial end of the coil frame of the present invention is provided with a first fixing portion facing the base. The first fixing portion is fixedly connected to the base, so that when the coil frame of the present invention is subjected to impact vibration, the other axial end of the coil frame will not float up, thereby improving the mechanical stability of the magnetic circuit part and improving the stability and reliability of product parameters.

[0018] 2. The present invention further provides a second fixing portion, which is used to effectively fix one axial end of the coil frame, so that the magnetic circuit system of the present invention can be effectively fixed on both sides. Therefore, when the product is subjected to large vibration or impact, the position of its magnetic circuit part will not change, thereby ensuring that the product parameters are stable and reliable.

[0019] 3. There are two second fixing parts, one corresponding to each of the two coil lead terminals. Each coil lead terminal is attached to a corresponding second fixing part, allowing the second fixing part to directly mate with the corresponding mating portion of the base, eliminating the need to occupy additional space within the base and making the overall design more compact. Furthermore, the presence of two second fixing parts, together with the first fixing part, forms a triangular arrangement of fixing points, significantly improving the mechanical stability and shock resistance of the entire magnetic circuit system.

[0020] 4. The movable spring lead-out terminal is in a U-shape, with its top electrically connected to the other side of the yoke, its middle part located below the enameled wire and extending toward the other axial end of the coil frame, and its bottom passing downward through the third insertion hole provided on the base and having an interference fit with the third insertion hole. On the one hand, the movable spring lead-out terminal can avoid the coil lead-out terminal, and on the other hand, the cooperation between the movable spring lead-out terminal and the base can be utilized to increase the firmness of the connection between the magnetic circuit system and the base, thereby further improving the mechanical stability of the magnetic circuit part when subjected to impact and vibration.

[0021] 5. The hollowed-out and arched bent portion increases the flexibility and length of the dynamic spring, thereby reducing its range of motion. The second leaf's actuation point and fixed point on the yoke do not coincide, and are staggered across the yoke's width. This ensures that stress is not concentrated on the second leaf's fixed point on the yoke during the dynamic spring's motion, thereby preventing fatigue fracture at the fixed point. Consequently, the dynamic spring of this invention achieves long durability.

[0022] 6. The bent portion comprises several parallel and spaced strips, allowing the spring to be made as narrow as possible while maintaining current-carrying capacity, thereby further increasing its flexibility. In particular, the strips are arched, allowing the spring to be as long as space permits, further reducing the spring's range of motion and improving its durability.

[0023] 7. The second piece includes a force-carrying portion and a fixing portion. The long pieces and the fixing portion are located on the same side of the force-carrying portion, so that the fixing portion does not occupy additional length space of the dynamic spring, so that the length of the long piece can be made as long as possible, thereby minimizing the movement amplitude of the dynamic spring.

[0024] 8. The fixing portion and the supporting portion form a mountain shape, so that there is a gap between the fixing portion and the left and right sides of the supporting portion. When the dynamic spring moves, its supporting portion will be tilted, thereby playing a pulling and buffering role, further ensuring that the location of the fixing point of the dynamic spring is not prone to fatigue fracture.

[0025] The present invention will be further described in detail below with reference to 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

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention Figure 1 (excluding casing);

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of the magnetic circuit part of the present invention Figure 1 (excluding armature);

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the magnetic circuit part of the present invention Figure 2 (Not including magnets);

[0029] Figure 4 It is a structural schematic diagram of the yoke and the movable spring lead-out terminal of the present invention in an assembled state;

[0030] Figure 5 Schematic diagram of the three-dimensional structure of the base of the present invention (including static spring);

[0031] Figure 6 This is a cross-sectional view of the present invention Figure 1 (excluding casing);

[0032] Figure 7 Schematic diagram of the three-dimensional structure of the dynamic spring of the present invention;

[0033] Figure 8 This is a schematic diagram of the three-dimensional structure of the present invention Figure 2 (excluding casing);

[0034] Figure 9 This is a cross-sectional view of the present invention Figure 2 (including casing). DETAILED DESCRIPTION

[0035] For examples, see Figures 1-9As shown, an impact-resistant electromagnetic relay of the present invention includes a base 1, a magnetic circuit portion, and a contact portion. The magnetic circuit portion is horizontal and includes a yoke 3, an armature 2, an iron core 10, a coil frame 4 mounted on the base 1, and an enameled wire 5 disposed on the coil frame 4. The contact portion includes a movable spring 6 and a static spring 7. The static spring 7 is mounted on the base 1 and cooperates with the movable spring 6. The coil frame 4, yoke 3, iron core 10, movable spring 6, and armature 2 are assembled together in a snap-fit structure. Specifically, the iron core 10 is mounted in the coil frame 4, with one end of the iron core 10 connected to the yoke 3. The armature 2 is located at the other end of the iron core 10, and one end of the armature 2 cooperates with the blade of the yoke 3. The movable spring 6 is generally L-shaped, with its two ends connected to the armature 2 and yoke 3, respectively. One axial end of the coil frame 4 is provided with two coil lead-out terminals 51 electrically connected to the enameled wire 5, and the two coil lead-out terminals 51 respectively pass through the base 1; the other axial end of the coil frame 4 is provided with a first fixing portion 41 facing the base 1, and the first fixing portion 41 is fixedly connected to the base 1.

[0036] In this embodiment, the first fixing portion 41 is inserted into the first insertion hole 11 provided on the base 1, and the two are fixed by glue. The first fixing portion 41 and the coil frame 4 are integrally formed.

[0037] In this embodiment, one axial end of the coil bobbin 4 is provided with a second fixing portion 42 facing the base 1. This second fixing portion 42 is integrally formed with the coil bobbin 4 and is fixedly connected to the base 1. Specifically, the second fixing portion 42 is inserted into the second jack 12 provided on the base 1, and the two are glued and fixed. In other embodiments, the coil lead terminals are separately inserted into the base to secure one axial end of the coil bobbin.

[0038] In this embodiment, the number of the second fixing parts 42 is two, corresponding one to the two coil lead terminals 51, and each coil lead terminal 51 is respectively provided in the corresponding second fixing part 42. Specifically, the second fixing part 42 is a hollow structure with an open bottom end, and the top of each coil lead terminal 51 is respectively fixed in the corresponding second fixing part 42, and each coil lead terminal 51 partially extends out of the second fixing part 42 through a clearance opening provided on the side of the second fixing part 42, for electrically connecting with the coil lead terminal 51, and electrically connecting with the enameled wire 5 and interference fitting with the base 1. Specifically, the portion of each coil lead terminal 51 extending out of the clearance opening on the side of the second fixing part 42 is respectively provided with a plurality of protrusions 511 and a connecting rod 512. The protrusion 511 is used to interference fit with the second jack 12 of the base 1, and the connecting rod 512 is used to electrically connect with the enameled wire 5. Specifically, the end of the enameled wire 5 is wound around the connecting rod 512.

[0039] In this embodiment, Figure 5As shown, the yoke 3 is L-shaped, one side of which fits on the upper side of the coil frame 4 and is riveted to the dynamic spring 6, and the other side is riveted to one end of the iron core 10. The present invention also includes a dynamic spring lead-out terminal 8, which is roughly in the shape of a letter "U", the top of which is electrically connected to the other side of the yoke 3, the middle part of which is located below the enameled wire 5 and extends toward the other axial end of the coil frame 4, and the bottom of which passes downward through the third socket 13 provided on the base 1 and is interference fit with the third socket 13. Specifically, a plurality of protrusions 81 are provided on the side surface of the bottom of the dynamic spring lead-out terminal 8 for interference fit with the third socket 13 of the base 1. The structural design of the dynamic spring lead-out terminal 8, on the one hand, enables the dynamic spring lead-out terminal 8 to avoid the coil lead-out terminal 51, and on the other hand, the cooperation between the dynamic spring lead-out terminal 8 and the base 1 can be used to increase the firmness of the connection between the magnetic circuit system and the base 1, thereby further improving the mechanical stability of the magnetic circuit part when it is subjected to impact vibration. In this embodiment, as Figure 7 As shown, the dynamic spring 6 includes a first sheet 61 that cooperates with the armature 2, a second sheet 62 that cooperates with the yoke 3, and a bending portion arranged between the first sheet 61 and the second sheet 62. The bending portion is hollow and arched, and the action point of the second sheet 62 on the yoke 3 does not coincide with the fixed point, and is staggered in the width direction of the yoke 3.

[0040] In this embodiment, the bent portion includes a plurality of long strips 63 arranged in parallel and spaced apart. One end of each long strip 63 is integrally connected to the first sheet 61, and the other end of each long strip 63 is integrally connected to the second sheet 62. Each long strip 63 is arched. Specifically, each long strip 63 is arched and has the maximum possible arching angle allowed by space. The number of long strips 63 is two, but not limited to this. The length of the portion 631 of the long strip 63 located on the same side of the armature 2 as the first sheet 61 is shorter than the length of the remaining portion 632 of the long strip 63, and the remaining portion 632 of the long strip 63 occupies most of the space on one side of the yoke 3.

[0041] In this embodiment, the second piece 62 includes a force-carrying portion 621 and a fixed portion 622. The other end of each long piece 63 and the fixed portion 622 are integrally connected to the force-carrying portion 621. Each long piece 63 and the fixed portion 622 are located on the same side of the force-carrying portion 621, so that the fixed portion 622 does not occupy additional space along the length of the dynamic spring 6, thereby allowing the long piece 63 to be as long as possible. The action force point of the second piece 62 on the yoke 3 is located at the force-carrying portion 621, and the fixed point of the second piece 62 on the yoke 3 is located at the fixed portion 622.

[0042] In this embodiment, the fixing portion 622 is located in the middle of one side of the supporting portion 621, and the fixing portion 622 and the supporting portion 621 form a mountain shape. Two long strips 63 are located on opposite sides of the fixing portion 622 and are connected to the left and right sides of the supporting portion 621 respectively.

[0043] In this embodiment, the force-carrying portion 621 is provided with a plurality of first rivet holes (not shown) for riveting to the yoke 3 (specifically, two, but not limited thereto), distributed along the length of the fixing portion 622. The first sheet 61 is provided with a second rivet hole 611 for riveting to the armature 2 and a movable contact 64. The second rivet hole 611 and the movable contact 64 are respectively located at opposite ends of the first sheet 61.

[0044] In this embodiment, the present invention further includes a tension spring 9. This tension spring 9 and the second leaf 62 of the movable spring 6 are located on the same side of the yoke 3, with both ends of the tension spring 9 connected to the armature 2 and yoke 3, respectively. Specifically, the tension spring 9 is located between the two long strips 63 of the movable spring 6, and its ends are respectively attached to a hook structure provided on the armature 2 and a hook structure provided on one side of the yoke 3. This tension spring 9 is used to increase the reaction force of the movable spring 6.

[0045] In this embodiment, the present invention further comprises a housing 20 , the bottom end of which is open and connected to the base 1 , so as to contain the magnetic circuit portion in its cavity.

[0046] In this embodiment, there are two static springs 7 , which respectively constitute a normally open static spring and a normally closed static spring. One end of the dynamic spring 6 where the moving contact 64 is located is located between the two static springs 7 .

[0047] During assembly of the impact-resistant electromagnetic relay of the present invention, the static spring 7 is first inserted into the base 1. Next, the coil bobbin 4, which is assembled with the yoke 3, iron core 10, enameled wire 5, and coil lead terminals 51, is installed on the base 1. Specifically, the first fixing portion 41 of the coil bobbin 4 is passed through the first insertion hole 11 of the base 1 and fixed with glue. The second fixing portion 42 of the coil bobbin 4 is passed through the second insertion hole 12 of the base 1 and fixed with glue. Next, the dynamic spring 6, to which the armature 2 is riveted, is riveted to the yoke 3. Finally, the tension spring 9 is attached to complete the assembly.

[0048] The present invention relates to an impact-resistant electromagnetic relay, in which the coil frame 4 is fixedly connected to the base 1 via a first fixing portion 41. This ensures that when the coil frame 4 is subjected to impact vibration, the other axial end of the coil frame 4 will not float, thereby improving the mechanical stability of the magnetic circuit portion and improving the stability and reliability of the product parameters. The coil frame 4 is further fixedly connected to the base 1 via a second fixing portion 42, achieving effective bilateral fixation. Therefore, when the product is subjected to large vibrations or impacts, the position of the magnetic circuit portion will not change, ensuring the stability and reliability of the product parameters. The hollowed-out and arched bent portion can increase the flexibility of the dynamic spring 6 and increase the length of the dynamic spring 6, thereby reducing the movement amplitude of the dynamic spring 6. In particular, the bent portion includes the long strip 63, so that the bent portion of the dynamic spring 6 can be made as narrow and long as possible while ensuring the current-carrying capacity, thereby further increasing the flexibility of the dynamic spring 6 and reducing the movement amplitude of the dynamic spring 6. The actuation point and fixed point of the second leaf 62 on the yoke 3 do not coincide, and are staggered in the width direction of the yoke 3. This ensures that when the dynamic spring 6 is actuated, stress is not concentrated at the second leaf 62's fixed point on the yoke 3, thereby preventing fatigue fracture at the fixed point of the dynamic spring 6 on the yoke 3. Furthermore, the fixed portion 622 and the force-carrying portion 621 form a "mountain" shape, leaving a gap between the fixed portion 622 and the force-carrying portion 621 on both sides. This allows the force-carrying portion 621 to tilt upward during actuation, acting as a pull-and-buffer, further preventing fatigue fracture at the fixed point of the dynamic spring. Consequently, the dynamic spring 6 of the present invention achieves long durability.

[0049] 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. A shock-resistant electromagnetic relay comprising a base, a magnetic circuit portion, and a contact portion. The magnetic circuit portion is horizontal and includes a yoke, an armature, an iron core, a coil bobbin mounted on the base, and an enameled wire disposed on the coil bobbin. One axial end of the coil bobbin is provided with two coil lead terminals electrically connected to the enameled wire, and the two coil lead terminals respectively extend through the base. The relay is characterized in that: The other axial end of the coil frame is provided with a first fixing portion facing the base, and the first fixing portion is fixedly connected to the base; one axial end of the coil frame is provided with a second fixing portion facing the base, and the second fixing portion is fixedly connected to the base; there are two second fixing portions, and the two second fixing portions and the first fixing portion form triangularly distributed fixing points; the two second fixing portions correspond one-to-one to the two coil lead-out terminals, and the top of each coil lead-out terminal is respectively fixed in the corresponding second fixing portion.

2. The shock-resistant electromagnetic relay according to claim 1, characterized in that: The first fixing portion is inserted into the first insertion hole provided on the base, and the two are fixed by gluing.

3. The shock-resistant electromagnetic relay according to claim 1, characterized in that: The coil lead-out terminals are respectively inserted into the base.

4. The shock-resistant electromagnetic relay according to claim 3, characterized in that: The second fixing portion is inserted into the second insertion hole provided on the base, and the two are fixed by gluing.

5. The shock-resistant electromagnetic relay according to claim 4, characterized in that: The second fixing portion is a hollow structure with an open bottom end, and the top of each coil lead terminal is respectively fixed in the corresponding second fixing portion, and each coil lead terminal partially extends out of the second fixing portion through a clearance opening provided on the side of the second fixing portion, and is electrically connected to the enameled wire and interference fits with the base.

6. The shock-resistant electromagnetic relay according to claim 1, characterized in that: The contact part includes a dynamic spring and a static spring, the static spring is installed on the base and cooperates with the dynamic spring; the coil frame, yoke, iron core, dynamic spring, and armature are assembled together according to a snap-fit structure; the yoke is L-shaped, one side of which cooperates with the upper side of the coil frame and is connected to the dynamic spring, and the other side is connected to one end of the iron core; it also includes a dynamic spring lead-out terminal, which is in a U-shape, the top of which is electrically connected to the other side of the yoke, the middle part of which is located below the enameled wire and extends toward the other axial end of the coil frame, and the bottom of which passes downward through the third socket provided on the base and is interference fit with the third socket.

7. The shock-resistant electromagnetic relay according to claim 6, characterized in that: The dynamic spring includes a first sheet body that cooperates with the armature, a second sheet body that cooperates with the yoke, and a bending portion arranged between the first sheet body and the second sheet body. The bending portion is hollow and arched. The action point of the second sheet body on the yoke does not coincide with the fixed point, and is staggered in the width direction of the yoke.

8. The shock-resistant electromagnetic relay according to claim 7, characterized in that: The bending portion includes a plurality of long strips arranged in parallel and spaced apart, one end of each long strip being integrally connected to the first sheet body, and the other end of each long strip being integrally connected to the second sheet body, and each long strip being arched and in a bow shape.

9. The shock-resistant electromagnetic relay according to claim 8, characterized in that: The second sheet includes a force-carrying part and a fixed part. The other end of each long sheet and the fixed part are respectively connected to the force-carrying part as a whole, and each long sheet and the fixed part are located on the same side of the force-carrying part. The action force point of the second sheet on the yoke is located at the force-carrying part, and the fixed point of the second sheet on the yoke is located at the fixed part.

10. The shock-resistant electromagnetic relay according to claim 9, characterized in that: The fixing portion is located in the middle of one side of the supporting portion, and the fixing portion and the supporting portion form a mountain shape; the number of the long strips is two, and the two long strips are located on two opposite sides of the fixing portion.

Images