Contact connection structure and contactor
By setting fastening positions and folding edge limits at both ends of the contactor bracket assembly, the problem of large space occupation of the contactor structure is solved, achieving product compactness and improved reliability, and increasing creepage distance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI LIANGXIN ELECTRICAL CO LTD
- Filing Date
- 2025-03-10
- Publication Date
- 2026-04-17
AI Technical Summary
Existing DC contactors with auxiliary contacts occupy a large space, resulting in a non-compact product design.
Design a contact connection structure, in which the support assembly forms fastening positions at both ends along the third direction, the fastening positions are located outside the U-shaped cavity, the moving point block is located inside the U-shaped cavity, the auxiliary spring and the support are limited by the folded edge, the fastener passes through the alignment hole for fixation, the auxiliary spring passes through the blocking part to block the electric arc, and the fixed support and the auxiliary support are fixed by riveting.
It saves product cavity space, improves product reliability and creepage distance, and enhances product performance.
Smart Images
Figure CN224138098U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage electrical technology, and more specifically, to a contact connection structure and a contactor. Background Technology
[0002] A contactor is a common electronic control device. Currently, there is a type of DC contactor with auxiliary contacts. The two auxiliary contact leads are fixed to the top wall of the housing, and their bottom ends extend into the cavity of the housing. The auxiliary contact structure is mounted on a bracket, which needs to be riveted to complete the assembly. When the bracket is riveted, the riveting structure occupies space in the cavity, making the overall product structure larger and hindering the compact design of the product. Utility Model Content
[0003] The purpose of this application is to address the shortcomings of the prior art by providing a contact connection structure and contactor that can reduce the structural size of the product.
[0004] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:
[0005] In one aspect of this application, a contact connection structure is provided, including a support assembly, and a movable block and an auxiliary spring located on both sides of the support assembly along a first direction. The two ends of the support assembly along a third direction are respectively formed with fastening positions, which are far away from the auxiliary spring. The two fastening positions are respectively located on both sides of the movable block along the third direction, and the first direction and the third direction are perpendicular.
[0006] Optionally, the moving point block forms moving contacts at both ends along the second direction, and the auxiliary spring forms auxiliary moving contacts at both ends along the third direction, wherein the second direction is perpendicular to the first direction and the third direction.
[0007] Optionally, the support assembly includes an auxiliary support and a fixed support sleeved within the auxiliary support, the fixed support and the auxiliary support being fixed by the fastening position, and the auxiliary spring being located on the auxiliary support.
[0008] Optionally, the auxiliary bracket has a folded edge, which cooperates with the fixed bracket to limit the position of the auxiliary bracket.
[0009] Optionally, the auxiliary bracket may also have a raised blocking portion formed on its end face along the first direction, and the auxiliary spring is inserted through the blocking portion to block the electric arc generated by the auxiliary moving contacts at both ends of the auxiliary spring.
[0010] Optionally, the fixed bracket forms folded portions on both sides along the third direction, and each folded portion is provided with a first fastening hole. The auxiliary bracket forms protrusions on both sides along the third direction, and each protrusion is provided with a second fastening hole. After the first fastening hole and the second fastening hole are aligned, the fastener passes through to fasten the auxiliary bracket and the fixed bracket.
[0011] Optionally, the auxiliary bracket is an injection-molded part, the auxiliary spring is a metal part, and the auxiliary spring and the auxiliary bracket are integrally injection-molded.
[0012] Optionally, the moving point block is further provided with grooves at both ends along the second direction. The grooves are arranged along the third direction. Along the second direction, the two grooves are located between the two moving contacts of the moving point block, and the grooves at the corresponding ends are close to the moving contacts.
[0013] In another aspect of this application, a contactor is provided, including a housing and the aforementioned contact connection structure disposed within the housing. The housing also includes two stationary contacts at positions corresponding to the two moving contacts of the moving point block, and two auxiliary stationary contacts at positions corresponding to the two auxiliary moving contacts of the auxiliary spring.
[0014] The beneficial effects of this application include:
[0015] This application provides a contact connection structure and a contactor. Two fastening positions are formed on a support assembly, located at both ends of the support assembly along a third direction. The support assembly has a U-shaped cavity structure, with the moving block located inside the U-shaped cavity and the fastening positions located outside the cavity. The fastening positions do not occupy cavity space, significantly saving product cavity size. Furthermore, placing the fastening positions at both ends of the support assembly along a third direction allows for a more secure fastening and ensures reliable relative positioning of the support assembly, moving block, and auxiliary spring, guaranteeing the position of the contacts on the moving block and auxiliary spring, effectively improving product reliability. In addition, it improves the product's creepage path, increases the creepage distance, and also contributes to improved product performance. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is one of the structural schematic diagrams of a contact connection structure provided in an embodiment of this application;
[0018] Figure 2 This is a second schematic diagram of a contact connection structure provided in an embodiment of this application;
[0019] Figure 3 This is a schematic diagram of a contact connection structure fixing bracket provided in an embodiment of this application;
[0020] Figure 4 This is a schematic diagram of the structure of an auxiliary support for a contact connection structure provided in an embodiment of this application;
[0021] Figure 5 This is an external view of a contactor provided in an embodiment of this application;
[0022] Figure 6 This is a partial structural diagram of a contactor provided in an embodiment of this application.
[0023] Icons: 10-Contact connection structure; 11-Auxiliary spring; 110-Auxiliary moving contact; 12-Bracket assembly; 121-Auxiliary bracket; 1210-Folded edge; 121a-Second fastening hole; 121b-Slot; 121c-Barrier part; 121d-Protrusion; 122-Fixed bracket; 1220-Fixed sidewall; 122a-First fastening hole; 122b-Extension part; 122c-Bend; 122d-Folding part; 123-Fastening position; 141-Push rod; 142-Elastic element; 143-Base; 144-Lower magnetic conductor; 144a-Protruding shaft; 145-Upper magnetic conductor; 13-Moving block; 130-Moving contact; 131-Groove; 20-Contactor; 20a-Housing; 21-Stationary contact; 22-Auxiliary stationary contact; F1-First direction; F2-Second direction; F3-Third direction. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. It should be noted that, unless otherwise specified, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0030] One aspect of the embodiments of this application refers to... Figure 1 A contact connection structure 10 is provided, including a support assembly 12, and a movable block 13 and an auxiliary spring 11 located on both sides of the support assembly 12 along a first direction F1. The movable block 13 forms movable contacts 130 at both ends along a second direction F2. The support assembly 12 forms fastening positions 123 at both ends along a third direction F3, for example, they can be riveted. The fastening positions 123 are located away from the auxiliary spring 11. The two fastening positions 123 are located on both sides of the movable block 13 along the third direction F3. The first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other.
[0031] The support assembly 12 forms a support for the contact connection structure 10, as shown in the figure. Figure 1 , Figure 2As shown, in the first direction F1, the movable block 13, the support assembly 12, and the auxiliary spring 11 are arranged sequentially from bottom to top. The movable block 13 is arranged along the second direction F2 and has two movable contacts 130, located at opposite ends of the movable block 13 in the second direction F2. The support assembly 12 is formed by riveting and has two fastening positions 123, located at opposite ends of the support assembly 12 along the third direction F3, and on opposite sides of the movable block 13.
[0032] In some embodiments, the two fastening positions 123 may be asymmetrically arranged along the third direction F3; in other embodiments, such as Figure 1 As shown, the two fastening positions 123 are symmetrically arranged along the third direction F3, and the line connecting the two moving contacts 130 is perpendicular to the line connecting the two fastening positions 123.
[0033] Depend on Figure 1 As can be seen, the bracket assembly 12 forms a structure with a U-shaped cavity. The fastening position 123 is located on the outside of the U-shaped cavity, and the moving point block 13 is located inside the U-shaped cavity. In this way, the fastening position 123 does not need to occupy the space of the U-shaped cavity, which greatly saves the size of the product cavity. Furthermore, setting the fastening position 123 at both ends of the bracket assembly 12 along the third direction F3 can make the fastening more secure and also makes the relative positioning of the bracket assembly 12, the moving point block 13, and the auxiliary spring 11 reliable, ensuring the position of the contacts on the moving point block 13 and the auxiliary spring 11, which can effectively improve the reliability of the product. In addition, it can also improve the creepage path of the product, increase the creepage distance of the product, and also contribute to the improvement of product performance.
[0034] Figure 1 The dashed arrow in the middle indicates the creepage path of the product. The creepage distance is calculated along the creepage path using the shortest distance between the fastening position 123 and the auxiliary spring 11. By setting the fastening position 123 at both ends of the bracket assembly 12 along the third direction F3, the creepage distance of this application is increased compared with the creepage distance of the prior art.
[0035] Furthermore, auxiliary moving contacts 110 are formed at both ends of the auxiliary spring 11 along the third direction F3. When the two fastening positions 123 are symmetrically arranged along the third direction F3, the line connecting the two fastening positions 123 is parallel to the line connecting the two auxiliary moving contacts 110. The setting direction of the auxiliary spring 11 and the direction of the line connecting the two fastening positions 123 are the same, both being the third direction F3. In this way, the line connecting the two moving contacts 130 is perpendicular to the line connecting the two auxiliary moving contacts 110.
[0036] Specifically, such as Figure 2As shown, the bracket assembly 12 includes an auxiliary bracket 121 and a fixed bracket 122 sleeved inside the auxiliary bracket 121. The fixed bracket 122 and the auxiliary bracket 121 are fastened by a fastening position 123, and the auxiliary spring 11 is located on the auxiliary bracket 121.
[0037] The auxiliary bracket 121 has a folded edge 1210, which cooperates with the fixed bracket 122. The folded edge 1210 increases the creepage distance and, in conjunction with the fixed bracket 122, limits the movement of the auxiliary bracket 121, preventing large displacement deviations of the auxiliary spring 11 on the auxiliary bracket 121 and ensuring the positional accuracy of the auxiliary bracket 121.
[0038] The auxiliary support 121 forms a U-shaped support, and the moving point block 13 is located inside the U-shaped opening of the U-shaped support, with the U-shaped opening facing the moving point block 13 to enclose it. Figure 3 , Figure 4 As shown, the fixed bracket 122 forms folded portions 122d on both sides along the third direction F3, and each folded portion 122d is provided with a first fastening hole 122a. The auxiliary bracket 121 forms protrusions 121d on both sides along the third direction F3, and each protrusion 121d is provided with a second fastening hole 121a. After the first fastening hole 122a and the second fastening hole 121a are aligned, the rivet passes through them to fix the auxiliary bracket 121 and the fixed bracket 122.
[0039] The auxiliary support 121 also has a raised blocking portion 121c formed on its end face along the first direction F1. The auxiliary spring 11 passes through the blocking portion 121c to block the electric arc generated when the auxiliary moving contact 110 at both ends of the auxiliary spring 11 separates from the corresponding auxiliary stationary contact 22, thus preventing crosstalk between the electric arcs at both ends. In addition, the blocking portion 121c can also be used to position and fix the support 122, ensuring the positional accuracy of the fixed support 122.
[0040] In addition, the fixed bracket 122 has a fixed side wall 1220, which is fitted inside the folded edge 1210. The fixed side wall 1220 extends along the first direction F1 to form an extension 122b, which extends out of the end of the folded edge 1210 toward the moving block 13.
[0041] like Figure 4 In the auxiliary bracket 121, a slot 121b is formed on the folded edge 1210. The fixed side wall 1220 of the fixed bracket 122 is inserted into the slot 121b, so that the auxiliary bracket 121 wraps around the fixed bracket 122 to improve the positioning parallelism of the two and make the contact position relatively stable.
[0042] The fixed sidewall 1220 of the fixed bracket 122 extends along the first direction F1 to form a folded edge 1210 towards the end of the moving block 13, so that the fixed sidewall 1220 forms an extension 122b. The fastening position 123 is located at the junction of the extension 122b and the folded edge 1210. At this time, the fastening position 123 is far away from the auxiliary spring 11. The fastening position 123 is far from the auxiliary moving contact 110 on the auxiliary spring 11. This can avoid the situation where the fastening force is too large and cracks are generated, which may easily lead to the failure of the product's withstand voltage insulation.
[0043] like Figure 2 As shown, the extension 122b of the fixed bracket 122 continues to extend downward. A base 143 is also provided below the fixed bracket 122 along the first direction F1 (on the side away from the auxiliary spring 11). The base 143 is located on the side of the moving block 13 away from the auxiliary spring 11 along the first direction F1. The extension 122b extends into the base 143, and the end of the extension 122b located in the base 143 also forms a bend 122c along the third direction F3.
[0044] like Figure 3 As shown, the fixed bracket 122 has two extensions 122b, and each extension 122b has a bend 122c at its end. The two bends 122c are arranged opposite to each other, so that the fixed bracket 122 is firmly fixed in the base 143 through the extensions 122b and the bends 122c, which ensures the stable installation of the bracket assembly 12, and thus ensures the stability of the moving block 13 and the auxiliary spring 11 that are installed in conjunction with the bracket assembly 12, so as to ensure reliable contact of the contacts.
[0045] Figure 2 In this configuration, an elastic element 142 is provided between the base 143 and the movable block 13. The elastic element 142 can be a spring. Specifically, a lower magnetic conductor 144 is also provided between the base 143 and the movable block 13. For example, the lower magnetic conductor 144 has an inverted U-shaped structure. The lower magnetic conductor 144 is located on the side of the movable block 13 away from the auxiliary spring 11 along the first direction F1. A receiving cavity is formed between the lower magnetic conductor 144 and the support assembly 12 to fix the movable block 13 inside. The elastic element 142 is located between the lower magnetic conductor 144 and the base 143.
[0046] Furthermore, the lower magnetic conductor 144 encloses the moving point block 13 within a U-shaped accommodating cavity. An upper magnetic conductor 145 is also disposed above the lower magnetic conductor 144 and the moving point block 13. One side of the upper magnetic conductor 145 is in contact with the bottom surface of the auxiliary support 121, and the other side is in contact with the top surface of the lower magnetic conductor 144 and the moving point block 13, thus firmly clamping the moving point block 13 between the lower magnetic conductor 144 and the support assembly 12. The arrangement of the upper magnetic conductor 145 and the lower magnetic conductor 144 enables the short-circuit protection function of the contact connection structure.
[0047] A push rod 141 is mounted on the base 143, positioned along the first direction F1. The push rod 141 is located on the side of the lower magnetic conductor 144 away from the auxiliary spring 11. One end of the push rod 141 passes through the base 143. An elastic element 142 is positioned between the lower magnetic conductor 144 and the push rod 141, with one end of the elastic element 142 sleeved on the end of the push rod 141 that passes through the base 143, and the other end sleeved on the convex shaft 144a of the lower magnetic conductor 144. Thus, through the pushing action of the push rod 141 along the first direction F1, the moving block 13 and the auxiliary spring 11 move upward synchronously, following the movement of the base 143, the lower magnetic conductor 144, and the support assembly 12, thereby contacting the corresponding stationary contact and auxiliary stationary contact above. Figure 6 As shown, the product is closed; similarly, the push rod 141 moves downward to open the product, while the elastic element 142 has the function of resetting the above components.
[0048] Furthermore, in this application, the auxiliary bracket 121 is an injection molded part, the auxiliary spring 11 is a metal part, and the auxiliary spring 11 and the auxiliary bracket 121 are integrally injection molded.
[0049] The auxiliary bracket 121 of this application is an injection molded part, which only requires injection molding of one metal part, the auxiliary spring 11. This makes molding easier and makes it easier to ensure the flatness of the auxiliary spring 11.
[0050] Again, such as Figure 1 As shown, grooves 131 are formed at both ends of the moving point block 13 along the second direction F2. The grooves 131 are arranged along the third direction F3. Along the second direction F2, the two grooves 131 are located between the two moving contacts 130 of the moving point block 13, and the grooves 131 and moving contacts 130 at corresponding ends are close to each other. That is, the grooves 131 on the moving point block 13 are closer to the bracket assembly 12 along the second direction F2, while the moving contacts 130 on the moving point block 13 are located on the outside of the moving point block 13, away from the bracket assembly 12, along the second direction F2.
[0051] The groove 131 prevents the electric arc from transferring directly to the center of the moving contact block 13. The arc must pass through the groove 131 during transfer, thus increasing the creepage distance and improving product performance. The groove 131 at the corresponding end is close to the moving contact 130, making it easier for the generated arc to enter the groove 131, thereby extending the creepage distance.
[0052] On the other hand, embodiments of this application also provide a contactor 20, such as Figure 5 , Figure 6As shown, it includes a housing 20a and the aforementioned contact connection structure 10 disposed within the housing 20a. Two stationary contacts 21 are also disposed within the housing 20a at positions corresponding to the two moving contacts 130 of the moving contact block 13. The stationary contacts at the ends of the stationary contacts 21 are in contact with the moving contacts 130. Two auxiliary stationary contacts 22 are also disposed within the housing 20a at positions corresponding to the two auxiliary moving contacts 110 of the auxiliary spring 11. The auxiliary stationary contacts at the ends of the auxiliary stationary contacts 22 are in contact with the auxiliary moving contacts 110, thereby closing the contactor 20.
[0053] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A contact connection structure, characterized in that, The bracket assembly includes a support assembly (12), and a movable block (13) and an auxiliary spring (11) located on both sides of the support assembly (12) along a first direction (F1). The support assembly (12) forms fastening positions (123) at both ends along a third direction (F3). The fastening positions (123) are away from the auxiliary spring (11). The two fastening positions (123) are located on both sides of the movable block (13) along the third direction (F3). The first direction (F1) and the third direction (F3) are perpendicular.
2. The contact connection structure according to claim 1, characterized in that The moving point block (13) forms moving contacts (130) at both ends along the second direction (F2), and the auxiliary spring (11) forms auxiliary moving contacts (110) at both ends along the third direction (F3). The second direction (F2) is perpendicular to the first direction (F1) and the third direction (F3).
3. The contact connection structure of claim 2, wherein, The bracket assembly (12) includes an auxiliary bracket (121) and a fixed bracket (122) sleeved in the auxiliary bracket (121). The fixed bracket (122) and the auxiliary bracket (121) are fixed by the fastening position (123). The auxiliary spring (11) is located on the auxiliary bracket (121).
4. The contact connection structure according to claim 3, characterized in that The auxiliary support (121) has a folded edge (1210), and the auxiliary support (121) is configured to cooperate with the fixed support (122) through the folded edge (1210) to limit the position of the auxiliary support (121).
5. The contact connection structure of claim 4, wherein, The fixed sidewall (1220) of the fixed bracket (122) is fitted inside the folded edge (1210) of the auxiliary bracket (121). The fixed sidewall (1220) extends along the first direction (F1) to form an extension (122b). The extension (122b) extends out of the end of the folded edge (1210) toward the moving block (13).
6. The contact connection structure of claim 3, wherein The auxiliary support (121) also has a protruding blocking portion (121c) formed on the end face along the first direction (F1), and the auxiliary spring (11) passes through the blocking portion (121c) to block the electric arc generated by the auxiliary moving contacts (110) at both ends of the auxiliary spring (11).
7. The contact connection structure of claim 3, wherein The fixed bracket (122) forms folded portions (122d) on both sides of the third direction (F3), and each folded portion (122d) is provided with a first fastening hole (122a). The auxiliary bracket (121) forms protrusions (121d) on both sides of the third direction (F3), and each protrusion (121d) is provided with a second fastening hole (121a). After the first fastening hole (122a) and the second fastening hole (121a) are aligned, the fastener passes through to fasten the auxiliary bracket (121) and the fixed bracket (122).
8. The contact connection structure of claim 3, wherein The auxiliary bracket (121) is an injection molded part, and the auxiliary spring (11) is a metal part. The auxiliary spring (11) and the auxiliary bracket (121) are integrally injection molded.
9. The contact connection structure of claim 2, wherein, The moving point block (13) also has grooves (131) formed at both ends along the second direction (F2). The grooves (131) are arranged along the third direction (F3). Along the second direction (F2), the two grooves (131) are located between the two moving contacts (130) of the moving point block (13), and the grooves (131) and the moving contacts (130) at the corresponding ends are close to each other.
10. A contactor characterized by comprising: Includes a housing (20a) and a contact connection structure (10) according to any one of claims 1 to 9 disposed within the housing (20a). The housing (20a) is further provided with two stationary contacts (21) at positions corresponding to the two moving contacts (130) of the moving block (13), and two auxiliary stationary contacts (22) at positions corresponding to the two auxiliary moving contacts (110) of the auxiliary spring (11).