Compact relay
By incorporating a multi-layered isolation structure and an S-shaped creepage path in the relay, the problem of insufficient isolation between high-voltage and low-voltage circuits in compact relays is solved, achieving effective isolation with a creepage distance of ≥4.2mm in a small volume, thus ensuring insulation performance.
Patent Information
- Application Number
- CN202323534108.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-22
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2033-12-22
AI Technical Summary
In existing compact relays, the creepage distance between high-voltage and low-voltage circuits is short, which cannot effectively isolate the high-voltage and low-voltage circuits and affects the insulation performance of the relay.
In a relay, the contact part and the magnetic circuit part are distributed on the left and right. The coil lead-out terminal group is set at the rear end of the contact part and the magnetic circuit part. The first, second and third isolation structures are added between the coil of the contact part and the magnetic circuit part, between the coil lead-out terminal group and the contact part, and between the iron core and the moving spring, respectively, forming a multi-layer isolation structure. The push card and the blocking arm of the base form an S-shaped creepage path to increase the creepage distance.
The compact structure achieves effective isolation between high-voltage and low-voltage circuits, with a creepage distance of ≥4.2mm, ensuring the small size and compact design of the relay.
Smart Images
Figure CN223898241U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of relays, specifically to a compact relay. Background Technology
[0002] A relay is an electrical control device that causes a predetermined step change in the controlled quantity in the electrical output circuit when the change in the input quantity (excitation quantity) reaches a specified requirement.
[0003] In a relay, the insulation performance between high-voltage and low-voltage circuits largely determines the operating current range of the relay. The insulation performance is related to the creepage distance; the longer the creepage distance, the better the insulation performance.
[0004] In the prior art, the side-by-side arrangement of the contact part and the magnetic circuit part is beneficial for saving space and enabling the relay to be miniaturized. However, this compact structure has a short creepage distance between high voltage and low voltage, which cannot effectively achieve isolation between high voltage and low voltage. Utility Model Content
[0005] Therefore, to solve the above problems, this utility model provides a compact relay.
[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:
[0007] A compact relay includes a base, a cover, and a contact portion, a magnetic circuit portion, and a coil lead-out terminal group mounted on the base. The coil lead-out terminal group is electrically connected to the coil of the magnetic circuit portion. The contact portion and the magnetic circuit portion are arranged left and right. The iron core of the magnetic circuit portion is connected to the moving spring of the contact portion by a push clip. The coil lead-out terminal group is located at the rear end of the contact portion and the magnetic circuit portion. The cover covers the contact portion, the magnetic circuit portion, and the coil lead-out terminal group and is fixed on the base. A first isolation structure is provided between the contact portion and the coil of the magnetic circuit portion. A second isolation structure is provided between the coil lead-out terminal group and the contact portion. A third isolation structure is provided between the iron core and the moving spring.
[0008] Furthermore, the push card is disposed at the front end of the contact portion and the magnetic circuit portion.
[0009] Furthermore, the base has a mounting cavity formed by an upper side wall, a lower side wall, a left side wall, and a right side wall. The magnetic circuit portion is assembled inside the mounting cavity, and the contact portion is located on the right side of the mounting cavity. The cover is provided with a first insertion wall that inserts between the right side wall and the contact portion. The first isolation structure is composed of the right side wall, the upper side wall, and the first insertion wall.
[0010] Furthermore, the mounting cavity has two openings, front and rear. The magnetic circuit part is inserted through the rear opening of the mounting cavity, and the coil lead-out terminal group is electrically connected to the coil of the magnetic circuit part through the rear opening of the mounting cavity. The iron core of the magnetic circuit part extends out through the front opening of the mounting cavity and is connected to the push card.
[0011] Furthermore, the base also has an upwardly protruding isolation barrier wall, which is located between the coil lead-out terminal group and the contact portion. The left side of the isolation barrier wall is connected to the right side wall of the mounting cavity. The upper end and the right side of the isolation barrier wall extend backward to form a barrier wall covering the coil lead-out terminal group. The cover is provided with a second insertion wall that inserts between the isolation barrier wall and the contact portion. The second isolation structure consists of an L-shaped barrier wall formed by the isolation barrier wall and the barrier wall, and the second insertion wall into which the cover inserts between the isolation barrier wall and the contact portion.
[0012] Furthermore, the upper sidewall of the mounting cavity also extends rearward to be flush with the baffle wall.
[0013] Furthermore, the push card extends rearward with a first blocking arm and a second blocking arm. The first blocking arm and the second blocking arm are both located between the iron core and the moving spring and are spaced apart. The right side wall of the mounting cavity also extends forward to form a third blocking arm. The third blocking arm extends between the first blocking arm and the second blocking arm. The third isolation structure is an S-shaped creepage isolation structure composed of the first blocking arm, the second blocking arm and the third blocking arm.
[0014] Furthermore, the first blocking arm is a snap-fit sidewall that participates in snapping the iron core.
[0015] Furthermore, the second blocking arm abuts against the moving spring.
[0016] Furthermore, the relay has a length of 23mm in the front-to-back direction, a width of 10mm in the left-to-right direction, and a height of 13mm in the up-down direction.
[0017] The technical solution provided by this utility model has the following beneficial effects:
[0018] 1. The relay of this application has its contact portion and magnetic circuit portion distributed left and right, with the coil lead-out terminal group located at the rear end of the contact portion and magnetic circuit portion, achieving a compact layout of the relay. Simultaneously, an isolation structure is added between high-voltage and low-voltage circuits; specifically, a first isolation structure is provided between the contact portion and the coil of the magnetic circuit portion, a second isolation structure is provided between the coil lead-out terminal group and the contact portion, and a third isolation structure is provided between the iron core and the moving spring; this effectively increases the creepage distance between high-voltage and low-voltage circuits, achieving a compact layout of the relay.
[0019] 2. The magnetic circuit part is assembled in the mounting cavity formed by the upper side wall, lower side wall, left side wall and right side wall, forming a box-type closed structure. The first isolation structure is composed of the right side wall, the upper side wall and the first insertion wall of the cover, which can effectively ensure the insulation isolation between the magnetic circuit part and the contact part.
[0020] 3. The creepage distance between the coil lead-out terminal group and the contact part is increased by the cooperation of the isolation barrier, the rearward extending barrier, and the second insertion wall formed on the cover, which can effectively ensure the insulation isolation between the coil lead-out terminal group and the contact part.
[0021] 4. The creepage distance between the iron core and the moving spring is increased by the S-shaped creepage isolation structure formed by the first and second blocking arms extended from the push card and the third blocking arm extended from the base, which can effectively ensure the insulation isolation between the iron core and the moving spring.
[0022] The technical solution provided in this application enables the relay to maintain a creepage distance of ≥4.2mm between high-voltage and low-voltage circuits within a compact size of 23mm*10mm*13mm (length*width*height), thus achieving a small and compact structure for the relay. Attached Figure Description
[0023] Figure 1 The image shown is a three-dimensional schematic diagram of the compact relay hidden cover in the embodiment.
[0024] Figure 2 The image shown is a side view of the compact relay in the embodiment;
[0025] Figure 3 As shown Figure 2 Sectional view of line AA in the middle;
[0026] Figure 4 The image shown is a top view of the compact relay in the embodiment;
[0027] Figure 5 As shown Figure 4 Sectional view of the middle BB line;
[0028] Figure 6 As shown Figure 5 Enlarged view of region C in the middle;
[0029] Figure 7 As shown Figure 1 Top view of the structure shown;
[0030] Figure 8 As shown Figure 7 Enlarged schematic diagram of region D in the middle;
[0031] Figure 9 The diagram shown is a structural schematic of the base in the embodiment;
[0032] Figure 10 The diagram shown is a structural schematic of the base in another direction in the embodiment;
[0033] Figure 11 The diagram shown is a structural schematic of the cover in the embodiment. Detailed Implementation
[0034] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0035] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.
[0036] Reference Figures 1 to 11 As shown, this embodiment provides a compact relay, including a base 10, a cover 60, and a contact portion 40, a magnetic circuit portion 20, and a coil lead-out terminal group 30 mounted on the base 10. Specifically, the structural components of the contact portion 40, the magnetic circuit portion 20, and the coil lead-out terminal group 30 are existing technologies. For example, the contact portion 40 includes a moving spring 41 and a stationary spring 42, the magnetic circuit portion 20 includes a coil, an iron core 21, and a yoke, and the coil lead-out terminal group 30 consists of multiple lead-out terminals for connecting the coil, which will not be described in detail here.
[0037] The coil lead-out terminal group 30 is electrically connected to the coil of the magnetic circuit section 20; the contact section 40 and the magnetic circuit section 20 are distributed left and right, and the iron core of the magnetic circuit section 20 is connected to the moving spring 41 of the contact section 40 through a push clip 50; the coil lead-out terminal group 30 is located at the rear end of the contact section 40 and the magnetic circuit section 20; the cover 60 covers the contact section 40, the magnetic circuit section 20 and the coil lead-out terminal group 30 and is fixed on the base 10. This arrangement achieves a compact layout of the relay.
[0038] A first isolation structure 1 is provided between the contact portion 40 and the coil of the magnetic circuit portion 20, which increases the creepage distance between the contact portion 40 and the coil of the magnetic circuit portion 20. A second isolation structure 2 is provided between the coil lead-out terminal group 30 and the contact portion 40, which also increases the creepage distance between them. A third isolation structure 3 is provided between the iron core 21 and the moving spring 41. Specifically, the iron core 21 and the moving spring 41 are connected by a push card 50, and the third isolation structure 3 is used to increase the creepage distance between the parts connected to the push card 50. In this specific embodiment, the push card 50 is located at the front end of the contact portion 40 and the magnetic circuit portion 20, that is, the front end of the iron core 21 is connected to the push card 50, and the front end of the moving spring 41 is also connected to the push card 50. The third isolation structure 3 isolates the front end of the iron core 21 and the front end of the moving spring 41 to increase the creepage distance between them. This configuration effectively increases the creepage distance between high-voltage and low-voltage circuits in all three locations, allowing the relays to achieve a compact layout while ensuring effective isolation between high-voltage and low-voltage circuits.
[0039] In this specific embodiment, the push card 50 is disposed at the front end of the contact portion 40 and the magnetic circuit portion 20. The front end position has sufficient space for layout and will not interfere with other structures. The layout is more reasonable and the structure is more compact. Of course, it is not limited to this in other embodiments.
[0040] The base 10 has a mounting cavity 101, which is enclosed by an upper side wall 112, a lower side wall 114, a left side wall 113, and a right side wall 111, forming a box-like closed structure. The magnetic circuit portion 20 is assembled inside the mounting cavity 101, so that the coil of the magnetic circuit portion 20 can form effective isolation in the four directions of up, down, left, and right. The contact portion 40 is located on the right side of the mounting cavity 101. The cover 60 is provided with a first insertion wall 61 that inserts between the right side wall 111 and the contact portion 40, such as... Figure 3 As shown, the first isolation structure 1 consists of a right side wall 111, an upper side wall 112 and a first insertion wall 61, so that there is a sufficiently long creepage distance between the coil of the magnetic circuit part 20 and the contact part 40 to meet the design requirements.
[0041] Specifically, the upper sidewall 112 has a latch 115 at a rearward position, which is used to engage the magnetic circuit portion 20 to fix it in place. Specifically, the shortest creepage path a between the coil and the contact portion 40 of the magnetic circuit portion 20 is: mounting cavity 101 → latch 115 → gap channel between the upper sidewall 112 and the inner wall of the cover 60 → gap channel between the right sidewall 111 and the first insertion wall 61. Even so, it still has a sufficiently long creepage distance.
[0042] The mounting cavity 101 has two openings, a front opening 102 and a rear opening 103. The magnetic circuit portion 20 is inserted into the mounting cavity 101 through the rear opening 103, and the coil lead-out terminal group 30 is electrically connected to the coil of the magnetic circuit portion 20 through the rear opening 103 of the mounting cavity 101. The iron core 21 of the magnetic circuit portion 20 extends out through the front opening 102 of the mounting cavity 101 and is connected to the push card 50. This arrangement is ingenious in its structural design and reasonable in its assembly.
[0043] The base 10 also has an upwardly protruding isolation barrier 121, which is located between the coil lead-out terminal group 30 and the contact portion 40. The left side of the isolation barrier 121 connects to the right side wall 111 of the mounting cavity 101, and the upper end and right side of the isolation barrier 121 extend rearward to form a barrier 122 covering the coil lead-out terminal group 30. The cover 60 is provided with a second insertion wall 62 that inserts between the isolation barrier 121 and the contact portion 40. The second isolation structure 2 is composed of the isolation barrier 121 and the barrier 122 forming an L-shaped barrier and the second insertion wall 62. This arrangement is as follows: Figure 6 As shown, the shortest creepage path b between the coil lead-out terminal group 30 and the contact portion 40 is: the spring of the contact portion 40 passes through the gap channel between the isolation barrier 121 and the second insertion wall 62 → the gap channel between the barrier 122 and the inner wall of the cover 60 and enters the position of the rear coil lead-out terminal group 30. This path also has a sufficiently long creepage distance.
[0044] Furthermore, the upper sidewall 112 of the mounting cavity 101 also extends rearward to be flush with the baffle 122, that is, the upper sidewall 112 of the mounting cavity 101 is flush with the rear end face of the baffle 122; further ensuring the isolation effect.
[0045] At the front end, the push card 50 extends rearward with a first blocking arm 51 and a second blocking arm 52. Both the first and second blocking arms 51 and 52 are located between the iron core 21 and the moving spring 41 and are spaced apart. The right side wall 111 of the mounting cavity 101 also extends forward to form a third blocking arm 116, which extends between the first and second blocking arms 51 and 52. The third isolation structure 3 is an S-shaped creepage isolation structure composed of the first blocking arm 51, the second blocking arm 52, and the third blocking arm 116, ensuring that the iron core and the moving spring are separated by a creepage barrier. Figure 8 The S-shaped bend path c shown is used for creepage, and this path also has a sufficiently long creepage distance.
[0046] Meanwhile, the first blocking arm 51 is a locking sidewall that participates in locking the iron core 21, that is, one of the sidewalls used to lock the iron core 21, while the second blocking arm 52 abuts against the moving spring 41, thereby driving the moving spring 41 to move; this setting can effectively simplify the structural design.
[0047] The design of the first isolation structure 1, the second isolation structure 2, and the third isolation structure 3 fully utilizes existing components without adding any additional parts. Furthermore, the ingenious structural design effectively maintains the product's compactness. This allows the relay to maintain a creepage distance of ≥4.2mm between high-voltage and low-voltage circuits within a compact volume of 23mm * 10mm * 13mm (length (front-to-back) * width (left-to-right) * height (top-to-bottom)), achieving a small and compact structure.
[0048] Of course, in other embodiments, the implementation structure of the first isolation structure 1, the second isolation structure 2 and the third isolation structure 3 is not limited to this. As mentioned above, the magnetic circuit part 2 may not be assembled using a box-type closed structure. The first isolation structure 1, the second isolation structure 2 and the third isolation structure 3 may also be assembled by adding other components, etc.
[0049] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.
Claims
1. A compact relay, comprising a base, a cover, and a contact portion, a magnetic circuit portion, and a coil lead terminal group mounted on the base, the coil lead terminal group being electrically connected to the coil of the magnetic circuit portion; characterized in that: The contact portion and the magnetic circuit portion are distributed left and right. The iron core of the magnetic circuit portion is connected to the moving spring of the contact portion by a push card. The coil lead-out terminal group is located at the rear end of the contact portion and the magnetic circuit portion. The cover covers the contact portion, the magnetic circuit portion and the coil lead-out terminal group and is fixed on the base. A first isolation structure is provided between the coil of the contact portion and the magnetic circuit portion, a second isolation structure is provided between the coil lead-out terminal group and the contact portion, and a third isolation structure is provided between the iron core and the moving spring.
2. The compact relay according to claim 1, characterized in that: The push card is located at the front end of the contact portion and the magnetic circuit portion.
3. The compact relay according to claim 1, characterized in that: The base has a mounting cavity, which is enclosed by an upper side wall, a lower side wall, a left side wall, and a right side wall. The magnetic circuit part is assembled in the mounting cavity, and the contact part is located on the right side of the mounting cavity. The cover is provided with a first insertion wall that inserts between the right side wall and the contact part. The first isolation structure is composed of the right side wall, the upper side wall, and the first insertion wall.
4. The compact relay according to claim 3, characterized in that: The mounting cavity has two openings, front and rear. The magnetic circuit part is inserted through the rear opening of the mounting cavity. The coil lead-out terminal group is electrically connected to the coil of the magnetic circuit part through the rear opening of the mounting cavity. The iron core of the magnetic circuit part extends out through the front opening of the mounting cavity and is connected to the push card.
5. The compact relay according to claim 3, characterized in that: The base also has an upwardly protruding isolation barrier wall, which is located between the coil lead-out terminal group and the contact portion. The left side of the isolation barrier wall is connected to the right side wall of the mounting cavity. The upper end and the right side of the isolation barrier wall extend backward to form a barrier wall covering the coil lead-out terminal group. The cover is provided with a second insertion wall that inserts between the isolation barrier wall and the contact portion. The second isolation structure consists of an L-shaped barrier wall formed by the isolation barrier wall and the barrier wall, and the second insertion wall into which the cover inserts between the isolation barrier wall and the contact portion.
6. The compact relay according to claim 5, characterized in that: The upper sidewall of the mounting cavity also extends rearward to be flush with the baffle wall.
7. The compact relay according to claim 3, characterized in that: The push card extends backward with a first blocking arm and a second blocking arm. The first blocking arm and the second blocking arm are both located between the iron core and the moving spring and are spaced apart. The right side wall of the mounting cavity also extends forward to form a third blocking arm. The third blocking arm extends between the first blocking arm and the second blocking arm. The third isolation structure is an S-shaped creepage isolation structure composed of the first blocking arm, the second blocking arm and the third blocking arm.
8. The compact relay according to claim 7, characterized in that: The first blocking arm is the snap-fit sidewall that participates in snapping the iron core.
9. The compact relay according to claim 7, characterized in that: The second blocking arm abuts against the moving spring.
10. The compact relay according to claim 1, characterized in that: The relay has a length of 23mm in the front-to-back direction, a width of 10mm in the left-to-right direction, and a height of 13mm in the top-to-bottom direction.