Auxiliary moving spring contact piece, auxiliary static spring contact piece, auxiliary contact structure and high-voltage DC relay

Abstract

The utility model discloses an auxiliary moving spring contact, an auxiliary static spring contact, an auxiliary contact structure and a high-voltage DC relay, including a moving spring contact body, the moving spring contact body including a base, the left and right sides of the base are respectively connected with a plurality of elastic bending arms arranged side by side and extending downward and outwardly inclined relative to the base, and a contact portion is connected to the free end of each elastic bending arm. The auxiliary moving spring contact of the utility model uses a plurality of elastic bending arms to connect a plurality of contact portions, so that the auxiliary contact structure can perform multi-point contact switching, improve the reliability of the auxiliary contact feedback signal and the stability of the auxiliary contact contact resistance; and the inclined elastic bending arm can prevent foreign matter from adhering to the contact surface of the contact portion or the auxiliary moving spring contact from being offset or even broken, resulting in the auxiliary contact being blocked, thereby improving the reliability of the auxiliary contact contact.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, and in particular to an auxiliary moving spring contact piece, an auxiliary static spring contact piece, an auxiliary contact structure and a high-voltage direct current relay. Background Art

[0002] A high-voltage DC relay with auxiliary contacts in the prior art comprises an inner support cover, a guide plate, two static contacts, a moving contact piece, a push rod and an auxiliary contact, wherein the inner support cover is arranged on the guide plate, and the two form a first insulating chamber, the moving contact piece is located in the first insulating chamber, and cooperates with the two static contacts to form a main contact, and the moving contact piece is driven by the push rod; it is characterized in that: the auxiliary contact comprises a moving conductive piece (equivalent to an auxiliary moving spring contact piece) and two electrical lead-out parts (equivalent to an auxiliary static spring contact piece), the inner support cover and the guide barrel also form a second insulating chamber located in the first insulating chamber, the bottom of the moving conductive piece and the two electrical lead-out parts are located in the second insulating chamber; the moving conductive piece is fixedly connected to the push rod through an insulating piece, and as the push rod moves up and down, the moving conductive piece contacts or separates from the two electrical lead-out parts; a clearance opening is provided on the side of the second insulating chamber to allow the insulating piece to move up and down. However, the auxiliary spring contact in this technical solution is a single-contact structure, and single-point contact is prone to auxiliary contact blockage due to surface foreign matter, spring offset, etc., and then the auxiliary contact feedback abnormality leads to misjudgment of the main contact state. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides an auxiliary movable spring contact piece, which can improve the contact reliability of the auxiliary movable spring contact piece.

[0004] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0005] An auxiliary spring contact comprises a spring contact body, wherein the spring contact body comprises a base, and the left and right sides of the base are respectively connected with a plurality of elastic bending arms arranged side by side and extending downwardly and outwardly relative to the base, and a contact portion is connected to the free end of each elastic bending arm.

[0006] Furthermore, a separation gap is formed between two adjacent elastic bending arms on the same side of the base, and the separation gap gradually widens from one side of the base toward the free end of the elastic bending arm.

[0007] Further, the upper end of the partition gap is configured to partially extend into the base.

[0008] Furthermore, two elastic bending arms are respectively connected to the left and right sides of the base, which are arranged side by side and extend downwardly and obliquely toward the outside relative to the base.

[0009] Furthermore, the movable spring contact piece body is an integrally bent structure.

[0010] Based on the same inventive concept, the utility model also provides an auxiliary static spring contact, including a static spring contact body, the lower end of which is formed with a plurality of contact ends for cooperating with the contact portions on the same side of any of the above-mentioned auxiliary moving spring contacts.

[0011] Furthermore, an anti-retraction limit portion is provided on the static spring contact piece body for fixing the static spring contact piece body to the auxiliary static spring contact piece installation groove of the inner support cover.

[0012] Furthermore, a positioning slot is provided in the auxiliary static spring contact installation slot, and a positioning protrusion corresponding to the positioning slot is provided on the static spring contact body. By utilizing the positioning cooperation between the positioning protrusion and the positioning slot, the static spring contact body can be stably and reliably fixed in the auxiliary static spring contact installation slot of the inner support cover.

[0013] Furthermore, the anti-retraction limiting portion includes an elastic limiting arm connected to the static spring contact piece body and extending upwardly on one side, and an avoidance groove corresponding to the elastic limiting arm is opened on the static spring contact piece body.

[0014] Based on the same inventive concept, the utility model also provides an auxiliary contact structure, comprising any of the above-mentioned auxiliary dynamic spring contact pieces and two auxiliary static spring contact pieces.

[0015] Based on the same inventive concept, the utility model also provides a high-voltage DC relay, including the above-mentioned auxiliary contact structure.

[0016] Furthermore, the base of the movable spring contact body is configured to be fixedly connected to an insulating member by insert injection molding.

[0017] Furthermore, the insulating member is connected to a driving part of the high-voltage DC relay, and the driving part drives the insulating member to move.

[0018] Furthermore, a positioning notch is provided on the base for positioning the auxiliary spring contact piece during insert injection molding.

[0019] Furthermore, the auxiliary static spring piece is fixedly mounted on the inner support cover of the high voltage DC relay, and the auxiliary static spring piece partially extends into the cavity of the inner support cover and is arranged corresponding to the contact portion of the auxiliary moving spring piece.

[0020] The above technical solution has the following advantages or beneficial effects:

[0021] In the auxiliary movable spring contact piece, auxiliary static spring contact piece and auxiliary contact structure described in the utility model, multiple elastic bending arms are used on the auxiliary movable spring contact piece to connect multiple contact parts, so that the auxiliary contact structure can perform multi-point contact on and off, thereby improving the reliability of the auxiliary contact feedback signal and the stability of the auxiliary contact contact resistance; and the inclined elastic bending arm can prevent foreign matter from adhering to the contact surface of the contact part or the auxiliary movable spring contact piece from being offset or even broken, resulting in the auxiliary contact being blocked, thereby improving the reliability of the auxiliary contact contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the auxiliary dynamic spring contact piece of the embodiment of the utility model.

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the auxiliary static spring contact piece of the embodiment of the utility model.

[0024] Figure 3 It is a schematic diagram of the coordination of the auxiliary dynamic spring contact piece, the auxiliary static spring contact piece and the insulating member in the embodiment of the utility model.

[0025] Figure 4 It is a schematic diagram of the internal structure of a high-voltage DC relay according to an embodiment of the utility model.

[0026] Description of labels:

[0027] 1. Moving spring contact body, 2. Insulating member, 3. Static spring contact body, 4. Inner support cover, 11. Base, 12. Elastic bending arm, 13. Contact portion, 14. Separation gap, 31. Contact end, 32. Anti-retraction limiting portion, 41. Installation slot, 111. Positioning notch, 321. Elastic limiting arm, 322. Avoidance slot. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] Please refer to the attached Figure 1 To Attachment Figure 4One embodiment of the utility model provides an auxiliary spring contact, including a spring contact body 1, the spring contact body 1 including a base 11, the left and right sides of the base 11 are respectively connected with a plurality of elastic bending arms 12 arranged side by side and extending downward and outwardly inclined relative to the base 11, and a contact portion 13 is connected to the free end of each elastic bending arm 12. It can be understood that in this embodiment, the auxiliary spring contact uses multiple elastic bending arms 12 to connect multiple contact portions 13, so that the auxiliary contact structure can be made to make and break multiple points of contact, improve the reliability of the auxiliary contact feedback signal and the stability of the auxiliary contact contact resistance; and the inclined elastic bending arm 12 can prevent foreign matter from adhering to the contact surface of the contact portion 13 or the auxiliary spring contact from being offset or even broken, resulting in the auxiliary contact being blocked, thereby improving the reliability of the auxiliary contact contact.

[0031] Please refer to the attached Figure 1 In one preferred embodiment, a separation gap 14 is formed between two adjacent elastic bending arms 12 on the same side of the base 11, and the separation gap 14 gradually widens from the side of the base 11 to the free end of the elastic bending arm 12. Preferably, the upper end of the separation gap 14 is configured to partially extend into the base 11. In this embodiment, the two elastic bending arms 12 on the same side of the base 11 form a bifurcated structure through the separation effect of the separation gap 14, and the separation gap 14 gradually widens from the side of the base 11 to the free end of the elastic bending arm 12, so that the mold insert is stronger and not easy to break. The elastic bending arm 12 extends downward and outwardly relative to the base 11 to form a trapezoidal shape, which has a better anti-stress concentration effect, effectively improves the problem of auxiliary spring contact piece fracture caused by excessive stress concentration during use, and improves the use stability of the auxiliary contact structure.

[0032] Please refer to the attached Figure 1 In one preferred embodiment, two elastic bending arms 12 are respectively connected to the left and right sides of the base 11 and are arranged side by side and extend downwardly and obliquely outwardly relative to the base 11. However, those skilled in the art should understand that in other embodiments, three or more elastic bending arms 12 may be respectively connected to the left and right sides of the base 11, and a contact portion 13 is provided at the free end of each elastic bending arm 12, and the embodiment is not limited to the specific implementation method disclosed in this embodiment.

[0033] Please refer to the attached Figure 1 In one preferred embodiment, the spring contact body 1 is an integrally bent structure. The base 11 of the spring contact body 1 is configured to be fixedly connected to an insulating member 2 by insert injection molding. Furthermore, a positioning notch 111 is provided on the base 11 for positioning the spring contact during insert injection molding.

[0034] Please refer to the attached Figure 2To Attachment Figure 4 One embodiment of the utility model further provides an auxiliary static spring contact piece, comprising a static spring contact piece body 3, and the lower end of the static spring contact piece body 3 is formed with a plurality of contact ends 31 for cooperating with the contact portions 13 on the same side of the auxiliary dynamic spring contact piece of any of the above embodiments. In this embodiment, preferably, two elastic bending arms 12 arranged side by side and extending downwardly and obliquely relative to the base 11 in the outer direction are respectively connected to the left and right sides of the base 11, and the lower end of the static spring contact piece body 3 is formed with two contact ends 31 for cooperating with the two contact portions 13 on the corresponding sides of the base 11.

[0035] Please refer to the attached Figure 2 To Attachment Figure 4 In one preferred embodiment, the static spring contact body 3 is provided with an anti-retraction limit portion 32 for fixing the static spring contact body 3 to the auxiliary static spring contact installation slot 41 of the inner support cover 4; preferably, a positioning slot 411 is provided in the auxiliary static spring contact installation slot 41, and a positioning protrusion 33 corresponding to the positioning slot 411 is provided on the static spring contact body 3. The positioning protrusion 33 cooperates with the positioning slot 411 so that the static spring contact body 3 can be stably and reliably fixedly installed in the auxiliary static spring contact installation slot 41 of the inner support cover 4, which is beneficial to avoid the false feedback problem caused by the unreliable installation of the static spring contact body 3 on the inner support cover 4; preferably, the anti-retraction limit portion 32 includes an elastic limiting arm 321 connected to the static spring contact body 3 and extending upward to the side on the opposite side, and an avoidance groove 322 corresponding to the elastic limiting arm 321 is provided on the static spring contact body 3. In this embodiment, when the static spring contact body 3 is inserted into the installation slot 41 of the inner support cover 4, the elastic limiting arm 321 is squeezed into the avoidance slot 322. When the static spring contact body 3 is inserted into place, the elastic limiting arm 321 will extend into the internal space of the inner support cover 4 and automatically pop open and reset. Then, the elastic limiting arm 321 presses against the bottom surface of the installation slot 41 to produce an anti-retraction limiting effect on the static spring contact body 3, thereby preventing the static spring contact body 3 from being pushed upward when the auxiliary static spring contact and the auxiliary moving spring contact are in contact with each other.

[0036] Please refer to the attached Figure 3 , Attachment Figure 4 An embodiment of the utility model further provides an auxiliary contact structure, comprising an auxiliary moving spring contact piece of any of the above embodiments and two auxiliary static spring contact pieces.

[0037] Please refer to the attached Figure 4, an embodiment of the utility model also provides a high-voltage DC relay, including the above-mentioned auxiliary contact structure. Further, the base 11 of the movable spring contact body 1 is configured to be fixedly connected to an insulating member 2 by insert injection molding; preferably, the insulating member 2 is connected to the pushing part of the high-voltage DC relay, and the pushing part drives the insulating member 2 to move. Further, a positioning notch 111 for positioning the auxiliary movable spring contact during insert injection molding is provided on the base 11; preferably, the auxiliary static spring is fixedly mounted on the inner support cover 4 of the high-voltage DC relay, and the auxiliary static spring part extends into the cavity of the inner support cover 4 and is arranged corresponding to the contact portion 13 of the auxiliary movable spring.

[0038] As described above, the embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model. Therefore, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the protection scope of the utility model.

Claims

1. An auxiliary spring contact piece, characterized in that: The movable spring contact piece body (1) comprises a base (11), and the left and right sides of the base (11) are respectively connected to a plurality of elastic bending arms (12) arranged side by side and extending downwardly and outwardly relative to the base (11), and a contact portion (13) is connected to the free end of each elastic bending arm (12).

2. The auxiliary spring contact according to claim 1, characterized in that: A separation gap (14) is formed between two adjacent elastic bending arms (12) on the same side of the base (11), and the separation gap (14) gradually widens from one side of the base (11) toward the free end of the elastic bending arm (12).

3. The auxiliary spring contact according to claim 2, characterized in that: The upper end of the separation gap (14) is configured to partially extend into the base (11).

4. The auxiliary spring contact according to claim 1, characterized in that: Two elastic bending arms (12) are respectively connected to the left and right sides of the base (11) and are arranged side by side and extend downwardly and obliquely toward the outside relative to the base (11).

5. An auxiliary static spring contact piece, characterized in that: It comprises a static spring contact body (3), the lower end of which is formed with a plurality of contact ends (31) for cooperating with the contact portions (13) on the same side of the auxiliary dynamic spring contact as claimed in any one of claims 1 to 4.

6. The auxiliary static spring contact piece according to claim 5, characterized in that: The static spring contact piece body (3) is provided with an anti-retraction limit portion (32) for fixing the static spring contact piece body (3) in an auxiliary static spring contact piece installation slot (41) of the inner support cover (4).

7. The auxiliary static spring contact piece according to claim 6, characterized in that: A positioning slot (411) is provided in the auxiliary static spring contact piece installation slot (41), and a positioning protrusion (33) corresponding to the positioning slot (411) is provided on the static spring contact piece body (3). By means of the positioning cooperation between the positioning protrusion (33) and the positioning slot (411), the static spring contact piece body (3) can be stably and reliably fixedly installed in the auxiliary static spring contact piece installation slot (41) of the inner support cover (4).

8. The auxiliary static spring contact piece according to claim 6, characterized in that: The anti-retraction limiting portion (32) comprises an elastic limiting arm (321) connected to the static spring contact piece body (3) and extending upwardly from one side, and an avoidance groove (322) corresponding to the elastic limiting arm (321) is provided on the static spring contact piece body (3).

9. An auxiliary contact structure, characterized in that: It comprises the auxiliary dynamic spring contact piece as described in any one of claims 1 to 4 and the auxiliary static spring contact piece as described in any one of claims 5 to 8.

10. A high voltage DC relay, characterized in that: The auxiliary contact structure as claimed in claim 9.

11. The high voltage DC relay according to claim 10, characterized in that: The base (11) of the movable spring contact body (1) is configured to be fixedly connected to an insulating member (2) by insert injection molding.

12. The high voltage DC relay according to claim 11, characterized in that: The insulating part (2) is connected to a driving part of the high-voltage DC relay, and the driving part drives the insulating part (2) to move.

13. The high voltage DC relay according to claim 11, characterized in that: The base (11) is provided with a positioning notch (111) for positioning the auxiliary spring contact piece during insert injection molding.

14. The high voltage DC relay according to claim 13, characterized in that: The auxiliary static spring piece is fixedly mounted on the inner support cover (4) of the high-voltage DC relay, and the auxiliary static spring piece partially extends into the cavity of the inner support cover (4) and is arranged corresponding to the contact portion (13) of the auxiliary moving spring piece.

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