Auxiliary contact structure and high voltage DC relay with auxiliary contact

Abstract

The present invention discloses an auxiliary contact structure and a high-voltage DC relay with auxiliary contacts, wherein the auxiliary contact structure includes a U-shaped bracket for mounting a main spring, an auxiliary contact lead-out terminal, an auxiliary spring and a ceramic cover; the ceramic cover has a cavity opening downward, and two auxiliary contact lead-out terminals are respectively mounted on the top wall of the ceramic cover and their respective bottom ends extend into the cavity of the ceramic cover; the auxiliary spring and the mounting bracket are connected to form an integral part by mutually insulating and isolating through plastic parts, and form a distribution form in which the auxiliary spring is on the top and the mounting bracket is on the bottom; the bottom of the mounting bracket is fixed to the top of the U-shaped bracket, and the two ends of the auxiliary spring correspond to the bottom ends of the two auxiliary contact lead-out terminals respectively. The present invention can solve the problems of easy scraping, complicated assembly process, large contact resistance, and inability to isolate strong and weak electricity in the prior art; and has the characteristics of simple assembly, small enough contact resistance, and large load.

Description

Technical Field

[0001] The invention relates to the technical field of relays, and in particular to an auxiliary contact structure and a high-voltage direct current relay with the auxiliary contact. Background Art

[0002] Most of the existing DC relays adopt the moving spring direct-acting type (also called solenoid direct-acting type). The contact part of this DC relay includes two static contacts and a dynamic component. The dynamic component includes a moving spring part and a push rod component. The moving spring part is composed of a moving spring and moving contacts at both ends of the moving spring. The moving spring is a direct-acting type. When the moving contacts at both ends of the moving spring are in contact with two static contacts (i.e., load lead-out terminals), the current flows into one of the static contacts, passes through the moving spring, and flows out from the other static contact. A DC relay in the prior art, its push rod component includes a push rod and a U-shaped bracket, the U-shaped bracket is installed on the upper part of the push rod, and the moving spring is installed in the U-shaped bracket through a spring, specifically between the top wall of the U-shaped bracket and the top of the push rod. In order to monitor the DC relay's failure caused by the contact not being conductive when it is on or the contact still being bonded when it is separated, the existing DC relay usually adds a set of auxiliary contacts, and the above-mentioned faults can be quickly detected by connecting the auxiliary contacts to an auxiliary detection circuit. The auxiliary detection structures of the products on the market currently include electromagnetic and mechanical types. Among them, the electromagnetic type, such as the reed switch type, is easily affected by magnetic interference and causes false monitoring. Therefore, a more reliable mechanical type is usually used. The mechanical auxiliary contact structure of the DC relay in the prior art mostly adopts the form of combining an auxiliary moving reed with an insulating sleeve or a push rod (as disclosed in Chinese patent CN107204251A). This structure has the following main disadvantages: (1) Scraping is easy to be generated during the assembly process, resulting in product non-conduction; (2) The retaining ring is easy to break, resulting in the inability to fix the insulating sleeve; (3) The assembly process of the insulating sleeve, spring, etc. is cumbersome; (4) The contact resistance is large; (5) Strong and weak electricity cannot be isolated.

[0003] On the other hand, in the prior art, the auxiliary contact lead-out terminal is mostly formed by opening a mounting hole on the housing, and then forming a metallization layer on the inner wall of the mounting hole or / and the upper and lower end surfaces of the mounting hole, and then placing the wire into the mounting hole and extending the wire into the housing, and fixing the wire to the housing by soldering, or the wire is not completely extended into the ceramic cover, and the metallization layer on the lower end surface of the mounting hole is used to electrically connect the wire. This auxiliary contact lead-out terminal structure of the prior art can only play a detection role, cannot carry a relatively large load, and the contact resistance is uncontrollable, and the manufacturing process is complicated. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an auxiliary contact structure and a high-voltage DC relay with auxiliary contacts. By improving the auxiliary contact structure, the problems of easy scraping, complicated assembly process, large contact resistance, and inability to isolate strong and weak electricity in the prior art can be solved; and the auxiliary contact structure has the characteristics of simple assembly, small enough contact resistance, and the ability to carry a large load.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an auxiliary contact structure, including a U-shaped bracket for mounting a main spring, an auxiliary contact lead-out terminal, an auxiliary spring and a ceramic cover; the ceramic cover has a cavity opening downward, and two auxiliary contact lead-out terminals are respectively mounted on the top wall of the ceramic cover and their respective bottom ends extend into the cavity of the ceramic cover; the auxiliary contact structure also includes a mounting bracket and a plastic part, the auxiliary spring and the mounting bracket are connected to form an integral part by the plastic part in an insulated and isolated manner, and form a distribution form in which the auxiliary spring is on the top and the mounting bracket is on the bottom; the bottom of the mounting bracket is fixed to the top of the U-shaped bracket, and the two ends of the auxiliary spring correspond to the bottom ends of the two auxiliary contact lead-out terminals respectively.

[0006] The plastic part connects the auxiliary spring and the mounting bracket together by injection molding to form the integral part.

[0007] The plastic part is a separate part, and the auxiliary spring and the mounting bracket are fixed to the plastic part by hot riveting to form the integral part.

[0008] The lower part of the mounting bracket is provided with two mounting feet exposed outside the plastic part, and the bottom of the two mounting feet of the mounting bracket is provided with a bending part, and the bending part of the mounting bracket is attached to the top of the U-shaped bracket and fixed to the top of the U-shaped bracket by riveting or welding.

[0009] A rivet hole is provided in the bent portion at the bottom of the mounting bracket, and a rivet protrusion protruding upward is provided on the upper surface of the top wall of the U-shaped bracket. The rivet hole in the bent portion at the bottom of the mounting bracket fits in the rivet protrusion on the upper surface of the top wall of the U-shaped bracket, and the mounting bracket is fixed to the top wall of the U-shaped bracket by riveting.

[0010] The top wall of the ceramic cover is provided with a through hole for installing the auxiliary contact lead-out terminal, and the auxiliary contact lead-out terminal is provided with a downward circular step, and the lower section of the step surface of the auxiliary contact lead-out terminal is adapted in the through hole of the ceramic cover, and the step surface of the auxiliary contact lead-out terminal is against the edge of the through hole of the ceramic cover, and the edge of the through hole of the ceramic cover is provided with a metallization layer, and the step surface of the auxiliary contact lead-out terminal and the metallization layer on the edge of the through hole of the ceramic cover are fixed by brazing.

[0011] A small boss is also provided on the edge of the through hole of the top wall of the ceramic cover, the metallized layer is provided on the small boss, the step surface of the auxiliary contact lead-out terminal abuts against the table surface of the small boss of the ceramic cover, and the step surface of the auxiliary contact lead-out terminal and the metallized layer on the table surface of the small boss of the ceramic cover are fixed by brazing.

[0012] The top wall of the ceramic cover is also protruded downward to be provided with a retaining wall for limiting the auxiliary spring in the width direction of the auxiliary spring.

[0013] A high-voltage DC relay with auxiliary contacts comprises a main contact lead-out terminal, a main spring and the auxiliary contact structure as described above, wherein the main contact lead-out terminals are respectively mounted on the top wall of the ceramic cover and their respective bottom ends extend into the cavity of the ceramic cover; the main spring is pressed against the lower surface of the top wall of the U-shaped bracket through a spring, and the two ends of the main spring correspond to the bottom ends of the two main contact lead-out terminals respectively.

[0014] The projections of the auxiliary reed and the main reed on the plane are cross-distributed.

[0015] The projections of the auxiliary reed and the main reed on the plane are substantially perpendicular.

[0016] A yoke is also arranged between the upper surface of the main spring and the lower surface of the top wall of the U-shaped bracket.

[0017] The cross-section of the middle and upper part of the ceramic cover is roughly rectangular. The main reed is accommodated in a cavity at a position corresponding to the middle and upper part of the ceramic cover. The main reed is distributed along the long side wall direction of the middle and upper part of the ceramic cover, and the auxiliary reed is distributed along the short side wall direction of the middle and upper part of the ceramic cover.

[0018] A convex rib facing the main spring leaf and limiting the main spring leaf in the width direction is also provided in the long side wall of the upper middle part of the ceramic cover.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The present invention adopts the method of connecting the auxiliary spring and the mounting bracket to form an integral part by insulating and isolating each other through plastic parts, and forming a distribution form in which the auxiliary spring is on the top and the mounting bracket is on the bottom; the bottom of the mounting bracket is fixed to the top of the U-shaped bracket, and the two ends of the auxiliary spring correspond to the bottom ends of the two auxiliary contact lead-out ends respectively. This structure of the present invention connects the auxiliary spring, the mounting bracket, and the plastic parts to form an integral part, and then fixes the integral structure to the U-shaped bracket by riveting or welding, so that no scraps are generated during the assembly process, and the auxiliary spring part is fixed by riveting or welding, which has the characteristics of being firm and reliable, and the main spring and the auxiliary spring can be isolated by plastic parts, so that strong and weak electricity isolation can be achieved.

[0021] 2. The present invention adopts a through hole for installing the auxiliary contact lead-out terminal on the top wall of the ceramic cover, a metallized layer is provided on the edge of the through hole of the ceramic cover, the auxiliary contact lead-out terminal is provided with a downward annular step, the lower section of the step surface of the auxiliary contact lead-out terminal is adapted in the through hole of the ceramic cover, the step surface of the auxiliary contact lead-out terminal is against the edge of the through hole of the ceramic cover, and the step surface of the auxiliary contact lead-out terminal is fixed to the metallized layer on the edge of the through hole of the ceramic cover by brazing. This structure of the present invention makes the assembly between the auxiliary contact lead-out terminal and the ceramic cover very simple.

[0022] 3. The present invention adopts a convex rib in the long side wall of the upper middle part of the ceramic cover, which is directed toward the main spring and limits the main spring in the width direction. This structure of the present invention indirectly controls the movement direction of the auxiliary spring by setting a limiting rib on the ceramic cover to limit the main spring.

[0023] 4. The present invention adopts a structure in which the top wall of the ceramic cover is protruded downwards and provided with a retaining wall for limiting the auxiliary spring in the width direction of the auxiliary spring. This structure of the present invention can prevent the auxiliary spring from deviating during the movement.

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the auxiliary contact structure and the high-voltage DC relay with auxiliary contacts of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a partial structural schematic diagram of the first embodiment of the present invention;

[0026] Figure 2 is a cross-sectional view of a partial structure of the first embodiment of the present invention (cut along the length direction of the main reed);

[0027] Figure 3 is a cross-sectional view of a partial structure of the first embodiment of the present invention (cut along the width direction of the main reed);

[0028] Figure 4 yes Figure 3 A magnified schematic diagram of part A in FIG.

[0029] Figure 5 It is a three-dimensional structural schematic diagram of a partial structure of the first embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of the appearance of the ceramic cover according to the first embodiment of the present invention;

[0031] Figure 7 is a cross-sectional view of the ceramic cover of the first embodiment of the present invention (cut along the long side wall direction of the ceramic cover);

[0032] Figure 8 is a cross-sectional view of the ceramic cover of the first embodiment of the present invention (cut along the short side wall direction of the ceramic cover);

[0033] Fig. 9 is a bottom view of the ceramic cover of the first embodiment of the present invention;

[0034] Fig.10 It is a schematic diagram of the coordination of the auxiliary spring, the mounting bracket and the plastic part of the second embodiment of the present invention;

[0035] Fig.11 yes Fig.10 Top view of the structure shown. DETAILED DESCRIPTION

[0036] Embodiment 1

[0037] See also Figures 1 to 9 As shown, an auxiliary contact structure of the present invention comprises a U-shaped bracket 3 for mounting a main spring, an auxiliary contact lead-out terminal 4, an auxiliary spring 5 and a ceramic cover 6; the ceramic cover 6 has a cavity 61 opening downward, and two auxiliary contact lead-out terminals 4 are respectively mounted on the top wall 62 of the ceramic cover 6 and extend their respective bottom ends into the cavity 61 of the ceramic cover 6; the auxiliary contact structure also comprises a mounting bracket 51 and a plastic part 52, the auxiliary spring 5 and the mounting bracket 51 are connected to form an integral part by mutually insulated and isolated plastic part 52 formed by plastic injection molding, and form a distribution form in which the auxiliary spring 5 is on the top and the mounting bracket 51 is on the bottom; the bottom of the mounting bracket 51 is riveted and fixed (of course, it can also be fixed by welding) on ​​the upper surface of the top wall 31 of the U-shaped bracket 3, and the two ends of the auxiliary spring 5 correspond to the bottom ends of the two auxiliary contact lead-out terminals 4 respectively.

[0038] In this embodiment, the lower portion of the mounting bracket 51 is provided with two mounting feet 511 exposed outside the injection molded body, and the bottom of the two mounting feet 511 of the mounting bracket 51 is provided with a bending portion 512, and the bending portion 512 of the mounting bracket 51 is attached to the upper surface of the top wall 31 of the U-shaped bracket 3 and is riveted and fixed to the top wall 31 of the U-shaped bracket 31.

[0039] In this embodiment, a rivet hole 513 is provided in the bent portion 512 at the bottom of the mounting bracket 51, and an upper surface of the top wall 31 of the U-shaped bracket 3 is provided with a rivet protrusion 311 protruding upward. The rivet hole 513 of the bent portion 512 at the bottom of the mounting bracket 51 is matched with the rivet protrusion 311 on the upper surface of the top wall 31 of the U-shaped bracket 3, and the mounting bracket 51 is fixed to the top wall 31 of the U-shaped bracket 3 by riveting.

[0040] In this embodiment, the top wall 62 of the ceramic cover 6 is provided with a through hole 621 for installing the auxiliary contact lead-out terminal 4, the auxiliary contact lead-out terminal 4 is provided with a downward annular step 41, the lower section of the step surface of the auxiliary contact lead-out terminal 4 is adapted in the through hole 621 of the ceramic cover 6, the step surface 41 of the auxiliary contact lead-out terminal 4 is against the edge of the through hole 621 of the ceramic cover 6, the edge of the through hole of the ceramic cover is provided with a metallization layer 40, and the step surface 41 of the auxiliary contact lead-out terminal 4 and the metallization layer 40 on the edge of the through hole 621 of the ceramic cover 6 are fixed by brazing. Brazing refers to a welding method in which a brazing material lower than the melting point of the weld and the weld (the metallization layer 40 of the ceramic cover 6 and the auxiliary contact lead-out terminal 4) are heated to the melting temperature of the brazing material at the same time, and the gap of the solid workpiece is filled with liquid brazing material to connect the weld, i.e., the ceramic cover 6 and the auxiliary contact lead-out terminal 4.

[0041] In this embodiment, a small boss 622 is further provided on the edge of the through hole 621 of the top wall 62 of the ceramic cover 6, and the metallization layer 40 is provided on the small boss 622. The step surface 41 of the auxiliary contact lead-out terminal 4 is against the table surface of the small boss 622 of the ceramic cover 6, and the step surface 41 of the auxiliary contact lead-out terminal 4 and the metallization layer 40 on the table surface of the small boss 622 of the ceramic cover 6 are fixed by brazing.

[0042] In this embodiment, the top wall of the ceramic cover 6 is further protruded downward to form a retaining wall 65 for limiting the auxiliary spring 5 in the width direction of the auxiliary spring 5 .

[0043] A high-voltage DC relay with auxiliary contacts of the present invention comprises a main contact lead-out terminal 1, a main spring 2 and the above-mentioned auxiliary contact structure; the two main contact lead-out terminals 1 are respectively mounted on the top wall 62 of the ceramic cover 6 and their respective bottom ends extend into the cavity 61 of the ceramic cover 6; the main spring 2 is pressed against the lower surface of the top wall 31 of the U-shaped bracket 3 through a spring 21, and the two ends of the main spring 2 correspond to the bottom ends of the two main contact lead-out terminals 1 respectively.

[0044] In this embodiment, the projections of the auxiliary spring 5 and the main spring 2 on the plane are cross-distributed.

[0045] In this embodiment, the projections of the auxiliary spring 5 and the main spring 2 on the plane are substantially perpendicular.

[0046] In this embodiment, a yoke 22 is further installed between the upper surface of the main spring 2 and the lower surface of the top wall 31 of the U-shaped bracket 3 .

[0047] In this embodiment, the cross-section of the middle and upper part of the ceramic cover 6 is roughly rectangular, and the main reed 2 is accommodated in a cavity corresponding to the position of the middle and upper part of the ceramic cover 6. The main reed 2 is distributed along the long side wall 63 of the middle and upper part of the ceramic cover, and the auxiliary reed 5 is distributed along the short side wall 64 of the middle and upper part of the ceramic cover 6.

[0048] In this embodiment, a convex rib 631 facing the main spring leaf 2 and limiting the main spring leaf 2 in the width direction is further provided in the long side wall 63 of the upper middle portion of the ceramic cover 6 .

[0049] In this embodiment, a sunken portion 66 is further provided between the inner side of the edge of the bottom of the ceramic cover 6 and the edge of the cavity 61 .

[0050] An auxiliary contact structure and a high-voltage DC relay with auxiliary contacts of the present invention adopt a plastic part 52 formed by plastic injection molding to connect the auxiliary spring 5 and the mounting bracket 51 into a whole in an insulated manner, and form a distribution form in which the auxiliary spring 5 is on the top and the mounting bracket 51 is on the bottom; the bottom of the mounting bracket 51 is riveted and fixed to the upper surface of the top wall 31 of the U-shaped bracket 3, and the two ends of the auxiliary spring 5 correspond to the bottom ends of the two auxiliary contact lead-out terminals 4 respectively. This structure of the present invention is to form an integral part of the auxiliary spring 5 and the mounting bracket 51 by plastic injection molding, and then fix the integral structure to the U-shaped bracket 3 by riveting, so that no scraps are generated during the assembly process, and the auxiliary spring part is fixed by riveting, which has the characteristics of being firm and reliable, and the injection molding body is used to isolate the main spring and the auxiliary spring, so that strong and weak electricity isolation can be achieved.

[0051] An auxiliary contact structure and a high-voltage DC relay with auxiliary contacts of the present invention adopt a through hole 621 for installing the auxiliary contact lead-out terminal provided on the top wall 62 of the ceramic cover 6, a metallized layer is provided on the edge of the through hole of the ceramic cover, the auxiliary contact lead-out terminal 4 is provided with a downward annular step 41, the lower section of the step 41 of the auxiliary contact lead-out terminal 4 is adapted in the through hole 621 of the ceramic cover 6, the step 41 of the auxiliary contact lead-out terminal 4 is against the edge of the through hole 621 of the ceramic cover 6, and the step 41 of the auxiliary contact lead-out terminal 4 is fixed to the metallized layer on the edge of the through hole 621 of the ceramic cover 6 by brazing. This structure of the present invention makes the assembly between the auxiliary contact lead-out terminal 4 and the ceramic cover 6 very simple.

[0052] The present invention provides a structure with auxiliary contacts and a high-voltage DC relay with auxiliary contacts, wherein a convex rib 631 is provided in the long side wall 63 in the middle and upper part of the ceramic cover 6, which faces the main spring 2 and limits the main spring in the width direction. This structure of the present invention indirectly controls the movement direction of the auxiliary spring by providing a limiting rib on the ceramic cover 6 to limit the main spring. The present invention also provides a retaining wall 65 that protrudes downward from the top wall 62 of the ceramic cover 6 and is used to limit the auxiliary spring 5 in the width direction of the auxiliary spring 5. This structure of the present invention can prevent the auxiliary spring from deviating during movement.

[0053] Embodiment 2

[0054] See also Figure 10 to Figure 11 As shown, a high-voltage DC relay with an auxiliary contact structure and an auxiliary contact of the present invention is different from the first embodiment in that the plastic part 52 is a separate part, and the auxiliary spring 5 and the mounting bracket 51 are respectively fixed to the plastic part 52 by hot riveting to form the one integral part.

[0055] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. An auxiliary contact structure, comprising a U-shaped bracket for mounting a main spring, an auxiliary contact lead-out terminal, an auxiliary spring and a ceramic cover; the ceramic cover has a cavity opening downward, two auxiliary contact lead-out terminals are respectively mounted on the top wall of the ceramic cover and their respective bottom ends extend into the cavity of the ceramic cover; characterized in that: The auxiliary contact structure also includes a mounting bracket and a plastic part. The auxiliary spring and the mounting bracket are connected to form an integral part by the plastic part in an insulated manner, and are distributed in a manner that the auxiliary spring is on the top and the mounting bracket is on the bottom. The bottom of the mounting bracket is fixed to the top of the U-shaped bracket, and the two ends of the auxiliary spring correspond to the bottom ends of the two auxiliary contact lead-out terminals respectively. The lower part of the mounting bracket is provided with a mounting foot exposed outside the plastic part, and the mounting foot is fixedly mounted on the U-shaped bracket.

2. The auxiliary contact structure according to claim 1, characterized in that: The plastic part connects the auxiliary spring and the mounting bracket together by injection molding to form the integral part.

3. The auxiliary contact structure according to claim 1, characterized in that: The plastic part is a separate part, and the auxiliary spring and the mounting bracket are fixed to the plastic part by hot riveting to form the integral part.

4. The auxiliary contact structure according to claim 2 or 3, characterized in that: The lower part of the mounting bracket is provided with two mounting feet exposed outside the plastic part, and the bottom of the two mounting feet of the mounting bracket is provided with a bending part, and the bending part of the mounting bracket is attached to the top of the U-shaped bracket and fixed to the top of the U-shaped bracket by riveting or welding.

5. The auxiliary contact structure according to claim 4, characterized in that: A rivet hole is provided in the bent portion at the bottom of the mounting bracket, and a rivet protrusion protruding upward is provided on the upper surface of the top wall of the U-shaped bracket. The rivet hole in the bent portion at the bottom of the mounting bracket fits in the rivet protrusion on the upper surface of the top wall of the U-shaped bracket, and the mounting bracket is fixed to the top wall of the U-shaped bracket by riveting.

6. The auxiliary contact structure according to claim 1, characterized in that: The top wall of the ceramic cover is provided with a through hole for installing the auxiliary contact lead-out terminal, and the auxiliary contact lead-out terminal is provided with a downward circular step, and the lower section of the step surface of the auxiliary contact lead-out terminal is adapted in the through hole of the ceramic cover, and the step surface of the auxiliary contact lead-out terminal is against the edge of the through hole of the ceramic cover, and the edge of the through hole of the ceramic cover is provided with a metallization layer, and the step surface of the auxiliary contact lead-out terminal and the metallization layer on the edge of the through hole of the ceramic cover are fixed by brazing.

7. The auxiliary contact structure according to claim 6, characterized in that: A small boss is also provided on the edge of the through hole of the top wall of the ceramic cover, the metallized layer is provided on the small boss, the step surface of the auxiliary contact lead-out terminal abuts against the table surface of the small boss of the ceramic cover, and the step surface of the auxiliary contact lead-out terminal and the metallized layer on the table surface of the small boss of the ceramic cover are fixed by brazing.

8. The auxiliary contact structure according to claim 1, characterized in that: The top wall of the ceramic cover is also protruded downward to be provided with a retaining wall for limiting the auxiliary spring in the width direction of the auxiliary spring.

9. A high voltage DC relay with auxiliary contacts, characterized in that: It comprises a main contact lead-out terminal, a main spring sheet and an auxiliary contact structure as claimed in any one of claims 1 to 7, wherein the main contact lead-out terminals are respectively mounted on the top wall of the ceramic cover and their respective bottom ends extend into the cavity of the ceramic cover; the main spring sheet is pressed against the lower surface of the top wall of the U-shaped bracket through a spring, and the two ends of the main spring sheet correspond to the bottom ends of the two main contact lead-out terminals respectively.

10. The high voltage DC relay with auxiliary contacts according to claim 9, characterized in that: The projections of the auxiliary reed and the main reed on the plane are cross-distributed.

11. The high voltage DC relay with auxiliary contacts according to claim 10, characterized in that: The projections of the auxiliary reed and the main reed on the plane are substantially perpendicular.

12. The high voltage DC relay with auxiliary contacts according to claim 9, characterized in that: A yoke is also arranged between the upper surface of the main spring and the lower surface of the top wall of the U-shaped bracket.

13. The high voltage DC relay with auxiliary contacts according to claim 9, characterized in that: The cross-section of the middle and upper part of the ceramic cover is roughly rectangular. The main reed is accommodated in a cavity at a position corresponding to the middle and upper part of the ceramic cover. The main reed is distributed along the long side wall direction of the middle and upper part of the ceramic cover, and the auxiliary reed is distributed along the short side wall direction of the middle and upper part of the ceramic cover.

14. The high voltage DC relay with auxiliary contacts according to claim 13, characterized in that: A convex rib facing the main spring leaf and limiting the main spring leaf in the width direction is also provided in the long side wall of the upper middle part of the ceramic cover.

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