CN217822596U

CN217822596U - Magnetic latching relay capable of rapidly extinguishing arc

Info

Publication number: CN217822596U
Application number: CN202221309939.2U
Authority: CN
Inventors: 姚茂松
Original assignee: Xiamen Hongfa Automotive Electronics Co Ltd
Current assignee: Xiamen Hongfa Automotive Electronics Co Ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-11-15
Anticipated expiration: 2032-05-27

Abstract

The utility model discloses a magnetic latching relay of quick arc extinguishing of ability, including insulating base, upper cover, the last magnetic circuit mechanism that is equipped with of insulating base, actuating mechanism and contact mechanism, contact mechanism includes stationary reed and the movable contact spring that corresponds with it, be equipped with the stationary contact on the stationary reed, movable contact spring serves and is equipped with the movable contact, the movable contact spring other end links firmly on the movable spring support that can electrically conduct, stationary reed and movable spring support can be dismantled and link firmly on insulating base, still be equipped with the movable spring that stretches out insulating base on the movable spring support and draw forth the end, stationary reed also is equipped with the stationary spring that stretches out insulating base and draws forth the end, the insulating base is inherent to be close to stationary contact one side is equipped with the magnet steel draw-in groove, is equipped with the magnet steel in the magnet steel draw-in groove, the upper cover links firmly on insulating base and pushes down the magnet steel upper end. The utility model discloses arc extinguishing magnet steel assembly structure is compact, has better arc extinguishing effect, can promote the disconnected ability of magnetic latching relay load.

Description

Magnetic latching relay capable of rapidly extinguishing arc

Technical Field

The utility model belongs to the technical field of the magnetic latching relay manufacturing technology and specifically relates to a magnetic latching relay of ability quick arc extinguishing.

Background

For the magnetic latching relay, along with the increase of load current, the movable contact and the static contact of the relay can generate electric arcs when being disconnected, so that the contacts are easy to ablate and bond, plastic parts around the contacts can be ablated, the surfaces of the plastic parts are carbonized, the surface insulation of the plastic parts is reduced, the product is caused to lose efficacy, and the service life of the relay is greatly shortened.

In order to improve the control capability of the load, people begin to add magnetic steel on the relay, and the technical effect of quickly extinguishing the arc is realized by the aid of the combined action of a magnetic field and arc current and the assistance of lengthening the arc. However, in the prior art, magnetic steel is usually additionally arranged on the outer side of the shell. For example, 11/18/2015, a chinese utility model patent with patent number 201520459636.2 and named "high voltage direct current relay" is disclosed, which is provided with magnetic steels at the upper part of the housing corresponding to the side walls at the two ends of the movable spring leaf, wherein the magnetic steels at the side walls at the two ends of the movable spring leaf correspond to the contact gaps at the two ends of the movable spring leaf, and the magnetic field directions of the magnetic steels at the side walls at the two ends of the movable spring leaf are parallel to the current flowing direction of the movable spring leaf. It can promote arc extinguishing ability, but need increase the bulge in shell upper portion both sides, and overall structure compactness receives the influence, and has increased the volume of whole relay.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a magnetic latching relay of ability quick arc extinguishing, its arc extinguishing magnet steel assembly structure is compact, has better arc extinguishing effect, can promote the magnetic latching relay load breaking capacity.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a magnetic latching relay of ability quick arc extinguishing, which comprises an insulation base, the upper cover, the last magnetic circuit mechanism that is equipped with of insulation base, actuating mechanism and contact mechanism, contact mechanism includes stationary contact and the movable contact who corresponds with it, be equipped with the stationary contact on the stationary contact, movable contact serves and is equipped with the movable contact, magnetic force through magnetic circuit mechanism production makes actuating mechanism move, actuating mechanism drives the movable contact and moves, make movable contact and stationary contact or break away from mutually, the movable contact other end links firmly on the movable spring support that can electrically conduct, stationary contact and movable spring support can dismantle and link firmly on insulation base, it draws forth the end still to be equipped with the movable spring that stretches out insulation base on the movable spring support, stationary contact also is equipped with the stationary spring that stretches out insulation base and draws forth the end, the inherent being close to of insulation base stationary contact one side is equipped with the magnet steel draw-in groove, the magnet steel is equipped with in the magnet steel draw-in the groove, the upper cover links firmly on insulation base and pushes down the magnet steel upper end.

The magnetic steel clamping groove is positioned between the movable spring piece and the static spring piece, and the magnetic pole direction of the magnetic steel is vertical to the current direction when the movable contact is in contact with the static spring piece. So that the structure is more compact and the arc extinguishing effect is better.

Still further, the static contact protrudes outwards from the end face of the static reed, and the thickness of the magnetic steel in the direction perpendicular to the end face of the static reed is larger than the protruding height of the static contact on the end face; the height of the magnetic steel is greater than the maximum outer diameter of the static contact. The magnetic steel can cover the contact position of the movable contact and the fixed contact to ensure the arc extinguishing effect when the movable contact and the fixed contact are separated.

The magnetic steel clamping groove is further improved, a side limiting convex part is arranged on one side of the magnetic steel clamping groove, a lower limiting convex part is arranged at the bottom of the magnetic steel clamping groove and abuts against the lower end of the magnetic steel, and the side limiting convex part abuts against one side of the magnetic steel; the lower end face of the upper cover is provided with an upper limiting convex part which is propped against the upper end of the magnetic steel. Thus, the magnetic steel can generate local deformation, and the firmness of magnetic steel installation is ensured.

Further improve, the terminal surface downwardly extending of upper cover has the reference column, the upper cover intermediate position is equipped with the mating holes, the intermediate position of insulating base is equipped with the location shrinkage pool respectively and connects the convex part, the reference column inserts the location shrinkage pool, connect the convex part with the mating holes matches and holds the upper cover. The connecting structure can prevent the middle position of the upper cover from bulging, and the appearance quality of the whole relay is improved.

Preferably, two groups of fixed contacts are arranged on the fixed spring pieces at intervals, two movable spring pieces are provided, the movable spring support is fixedly connected with the other ends of the two movable spring pieces, one group of movable contacts is arranged at one end of each of the two movable spring pieces, and the driving mechanism acts to drive the two movable spring pieces to act simultaneously so that the two groups of movable contacts and the two groups of fixed contacts are contacted or separated simultaneously; the insulating base is equipped with a magnet steel draw-in groove on one side of being close to every group stationary contact, all is equipped with the magnet steel in two magnet steel draw-in grooves, and the polarity of two magnet steel opposite faces is established to opposite.

And furthermore, two static contacts are arranged in each group along the upper and lower direction, two movable contacts are correspondingly arranged in each group, and the height of each magnetic steel is greater than the total distance between the two static contacts on each group of static contacts and the maximum outer diameters of the two static contacts.

Preferably, the magnetic circuit mechanism comprises a coil frame arranged on an insulating base, coils are arranged on the coil frame, two sides of the coil frame are respectively provided with a yoke, an iron core is arranged in a central hole of the coil frame, each yoke comprises a base part which is axially vertical to the central hole of the coil frame and an attraction part which is axially parallel to the central hole of the coil frame, the attraction parts are connected with one end of the base part, the attraction parts are vertical to the base parts, two ends of the iron core are respectively connected with the base parts of the two yokes, the two yoke attraction parts are in corresponding interval, a rotating frame is further arranged on the insulating base between the two yoke attraction parts, the rotating frame is provided with an armature and a permanent magnet which are mutually connected, and currents in different directions are introduced through the coils to enable the rotating frame to rotate along different directions and enable the armature and the yoke attraction parts to keep in an attraction state; the driving mechanism comprises a pushing piece, one end of the pushing piece is connected with the rotating frame, and the other end of the pushing piece is connected with the two movable reeds.

The improved structure is characterized in that the insulating base is further connected with a wiring port, the wiring port comprises five wiring terminals and an insulating shell connected with the insulating base, and the five wiring terminals are arranged on the insulating shell; the coil frame is provided with three coil terminals, the static reed is electrically connected with one end of a first signal conductive terminal, the movable reed support is electrically connected with one end of a second signal conductive terminal, the three coil terminals are respectively and electrically connected with three wiring terminals, and the other ends of the first signal conductive terminal and the second signal conductive terminal are respectively and electrically connected with the other two wiring terminals.

Furthermore, one end of the insulating shell is provided with an inserting part, the other end of the insulating shell is provided with a connecting part, the inserting part is provided with an inserting concave hole which is inserted with an external plug, the connecting part is connected with the insulating base, each wiring terminal comprises a fixing part, a transition part and a contact pin, one end of the transition part is connected with the fixing part, the other end of the transition part is connected with the contact pin, the contact pin is positioned in the inserting concave hole, all the contact pins are parallel to each other, the transition part is connected with the connecting part and prevents the wiring terminal from rotating relative to the insulating shell, and the fixing part is exposed outside the insulating shell;

transition portion and contact pin are in on the coplanar, the fixed part is mutually perpendicular with transition portion and contact pin, be equipped with the U-shaped draw-in groove on the fixed part, every coil terminal one end and a U-shaped draw-in groove that corresponds on the binding post fixed part pass through interference fit looks joint and form electric connection, the U-shaped draw-in groove that first signal conductive terminal other end and one correspond on the binding post fixed part passes through interference fit looks joint and forms electric connection, the U-shaped draw-in groove that second signal conductive terminal other end and one correspond on the binding post fixed part passes through interference fit looks joint and forms electric connection. The structure can further facilitate the assembly convenience of the coil terminal, the signal terminal and the wiring terminal, and can also improve the electric connection reliability of the coil terminal, the signal terminal and the wiring terminal, so that the relay is relatively vibration-resistant and impact-resistant.

The utility model discloses because the magnet steel draw-in groove sets up in insulating base and is close to stationary contact one side, then install the magnet steel in the magnet steel draw-in groove, can make full use of the space between relay movable contact spring and the stationary contact spring like this, do not increase the relay volume basically, the mounting structure of magnet steel is compact; and secondly, as the magnetic steel is close to the fixed contact, the magnetic field intensity acting when the movable contact is separated from the fixed contact is larger, and the arc extinguishing effect is better. In addition, due to the fact that arc extinguishing capacity can be improved, load breaking capacity of the magnetic latching relay can be improved, and bearable load current is increased.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of the hidden upper cover of the present invention;

FIG. 3 is a perspective view showing the relative positions of the stationary spring, the stationary contact and two magnetic steels;

FIG. 4 is a perspective view of the movable spring bracket coupled to two movable springs;

FIG. 5 is a top perspective view of the insulator base;

FIG. 6 is an enlarged view at A of FIG. 5;

FIG. 7 is a bottom perspective view of the upper cover;

FIG. 8 is a partial cross-sectional view of the magnetic steel in cooperation with the insulator base, the top cover and the stationary spring;

fig. 9 is a top view of the present invention in a partially sectioned state;

fig. 10 is a perspective view showing a state where the iron core is connected to two yokes;

FIG. 11 is a front perspective view of a patch port;

FIG. 12 is a rear perspective view of a patch port;

fig. 13 is a perspective view showing an arrangement state in which five connection terminals are mounted on an insulating housing;

fig. 14 is an enlarged view of fig. 2 at B.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 14, a magnetic latching relay capable of rapidly extinguishing arc includes an insulating base 1 and an upper cover 2, a magnetic circuit mechanism 3, a driving mechanism 4 and a contact mechanism 5 are mounted on the insulating base 1, the contact mechanism 5 includes a static spring 51 and a movable spring 52 corresponding to the static spring 51, two groups of static contacts 511 are spaced on the static spring 51, two groups of static contacts 511 are arranged along the upper and lower direction, two movable springs 52 are provided, one end of each movable spring 52 is provided with one group of movable contacts 521, and two groups of movable contacts 521 are also provided to correspond to each group of static contacts 511; the other ends of the two movable springs 52 are fixedly connected to the conductive movable spring support 6, the static spring 51 and the movable spring support 6 are detachably and fixedly connected to the insulation base 1, a movable spring leading-out end 61 extending out of the insulation base 1 is further arranged on the movable spring support 6, and the static spring 51 is also provided with a static spring leading-out end 512 extending out of the insulation base 1.

The magnetic steel clamping grooves 11 are formed in the insulating base 1 and close to each group, one side of each static contact 511 is provided with one magnetic steel clamping groove 11, each magnetic steel clamping groove 11 is located between the static spring leaf 51 and the movable spring leaf 52, one magnetic steel 7 is installed in each magnetic steel clamping groove 11, and the upper cover 2 is fixedly connected to the insulating base 1 and presses the upper end of the magnetic steel 7.

One side of the magnetic steel 7 is in contact with one end surface 513 of the fixed spring piece 51, the fixed contacts 511 protrude outwards from the end surface 513, the thickness of the magnetic steel 7 in the direction perpendicular to the end surface 513 of the fixed spring piece 51 is larger than the height of the fixed contacts 511 protruding outwards from the end surface 513, and the height h of each magnetic steel 7 is larger than the total distance between the two fixed contacts 511 on each group of fixed contacts 511 plus the maximum outer diameters of the two fixed contacts 511; the magnetic pole direction of the magnetic steel 7 is perpendicular to the current direction when the movable contact 521 is in contact with the fixed contact 511. Further ensuring the arc extinguishing effect of the magnetic steel.

A side limiting convex part 111 is arranged on one side of each magnetic steel clamping groove 11, a lower limiting convex part 112 is arranged at the bottom of each magnetic steel clamping groove 11, the lower limiting convex part 112 props against the lower end of the magnetic steel 7, and the side limiting convex part 111 props against one side of the magnetic steel 7; two upper limiting convex parts 21 are arranged on the lower end surface of the upper cover 2, and the upper limiting convex parts 21 are propped against the upper end of one magnetic steel 7.

Upper cover 2 cooperates on insulating base 1 through the joint mode, and 2 lower terminal surface downwardly extending of upper cover have

reference column

22, and 2 intermediate positions of upper cover are equipped with mating holes 23, and mating holes 23 are the through-hole, and insulating base 1's intermediate position is equipped with location shrinkage pool 12 respectively and connects convex part 13, reference column 22 inserts location shrinkage pool 12, connect convex part 13 with mating holes 23 matches and withholds upper cover 2 specifically passes for connecting convex part 13 upper end the mating holes 23 withholds

upper cover

2, and 1 upper end inward flange of insulating base is equipped with a plurality of buckles 14, and a plurality of buckles 14 block 2 upper end edges of upper cover.

The magnetic force generated by the magnetic circuit mechanism 3 drives the driving mechanism 4 to move, and the driving mechanism 4 drives the two movable springs 52 to move at the same time, so that the two sets of movable contacts 521 are respectively in contact with or separated from the two sets of stationary contacts 511.

The magnetic circuit mechanism 3 comprises a coil frame 31 arranged on an insulating base 1, a coil 310 is arranged on the coil frame 31, two sides of the coil frame 31 are respectively provided with a yoke 32, a central hole of the coil frame 31 is provided with an iron core 33, each yoke 32 comprises a base 321 which is axially vertical to the central hole of the coil frame 31 and an attraction part 322 which is axially parallel to the central hole of the coil frame 31, the attraction part 322 is connected with one end of the base 321, the attraction part 322 is vertical to the base 321, two ends of the iron core 33 are respectively connected with the base 321 of the two yokes 32, the attraction parts 322 of the two yokes 32 are corresponding in interval, a rotating frame 34 is further arranged on the insulating base 1 between the attraction parts 322 of the two yokes 32, the rotating frame 34 is provided with two armatures 341 and a permanent magnet 342, the two armatures 341 are respectively connected with two sides of the permanent magnet 342, currents in different directions are led into the coil 310 to enable the rotating frame 34 to rotate in different directions and enable each armature 341 and the attraction part 322 of one yoke 32 to keep in an attraction state; the driving mechanism 4 comprises a pushing member, one end of the pushing member is connected with the rotating frame 34, and the other end of the pushing member is simultaneously movably connected with two movable reeds 52. Each of the yokes 32 is further provided with an insertion portion 323 axially parallel to the central hole of the bobbin 31, the insertion portion 323 being connected to the other end of the base portion 321, the insertion portion 323 being perpendicular to the base portion 321, the insertion portion 323 being inserted into the central hole of the bobbin 31.

The insulation base 1 is also connected with a wiring port 8, the wiring port 8 comprises five wiring terminals 81 and an insulation shell 82 connected with the insulation base 1, and the five wiring terminals 81 are arranged on the insulation shell 82; one end of the insulating housing 82 is provided with a plug part 821, the other end of the insulating housing 82 is provided with a connecting part 822, the plug part 821 is provided with a plug concave hole 8211 which is plugged with an external plug, the connecting part 822 is connected to the insulating base 1 in a clamping manner, the upper cover 2 presses the connecting part 822, each wiring terminal 81 comprises a fixing part 811, a transition part 812 and a contact pin 813, one end of the transition part 812 is connected with the fixing part 811 and the other end of the transition part 813, the contact pins 813 are located in the plug concave hole 8211, all the contact pins 813 are parallel to each other, the transition part 812 is connected to the connecting part 822 and prevents the wiring terminal 81 from rotating relative to the insulating housing 82, and the fixing part 811 is exposed outside the insulating housing 82; transition portion 812 and contact pin 813 are in the coplanar, fixed part 811 is perpendicular to transition portion 812 and contact pin 813 mutually, be equipped with U-shaped draw-in groove 8111 on the fixed part 811, be equipped with three coil terminal 311 on the coil former 31, quiet reed 51 is connected with a first signal conductive terminal 51a one end electricity, movable spring support 6 is connected with a second signal conductive terminal 62 one end electricity, and wherein three binding post 81, specifically do are connected to three coil terminal 311 electricity respectively: one end of each coil terminal 311 is clamped with a U-shaped clamping groove 8111 on the fixing part 811 of one corresponding wiring terminal 81 through interference fit to form electrical connection; the other end of the first signal conductive terminal 51a is clamped with a corresponding U-shaped clamping groove 8111 on the fixing portion 811 of the wiring terminal 81 through interference fit and forms electrical connection, and the other end of the second signal conductive terminal 62 is clamped with a corresponding U-shaped clamping groove 8111 on the fixing portion 811 of the wiring terminal 81 through interference fit and forms electrical connection.

In this embodiment, the direction of the magnetic field formed by the two magnetic steels 7 being superimposed is perpendicular to the direction of the current when the moving contact 521 and the fixed contact 511 are in contact, and when the moving contact 521 and the fixed contact 511 are disconnected to generate an arc, the arc current will generate a force perpendicular to the arc current under the action of the magnetic field, and this force will stretch the arc to rapidly extinguish the arc. And the magnet steel of this embodiment is close to stationary contact one side setting, has both ensured magnetic field intensity, also makes overall structure more compact.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a magnetic latching relay of ability quick arc extinguishing, includes insulating base, upper cover, is equipped with magnetic circuit mechanism, actuating mechanism and contact mechanism on the insulating base, and contact mechanism includes stationary reed and the movable contact spring that corresponds with it, is equipped with the stationary contact on the stationary reed, and movable contact spring one is served and is equipped with the movable contact, makes actuating mechanism action through the magnetic force that magnetic circuit mechanism produced, and actuating mechanism drives the movable contact spring action for movable contact and stationary contact or break away from its characterized in that mutually: the movable spring piece other end links firmly on the movable spring support that can electrically conduct, and quiet reed and movable spring support can be dismantled and link firmly on insulating base, still are equipped with the movable spring that stretches out insulating base on the movable spring support and draw forth the end, and quiet reed also is equipped with the quiet spring that stretches out insulating base and draws forth the end, and insulating base is inherent to be close to quiet contact one side is equipped with the magnet steel draw-in groove, is equipped with the magnet steel in the magnet steel draw-in groove, and the upper cover links firmly on insulating base and pushes down the magnet steel upper end.

2. A magnetic latching relay capable of rapidly extinguishing an arc according to claim 1, wherein: one side of the magnetic steel is in contact with one end face of the static reed, the magnetic steel clamping groove is positioned between the movable reed and the static reed, and the magnetic pole direction of the magnetic steel is perpendicular to the current direction when the movable contact is in contact with the static reed.

3. The magnetic latching relay capable of rapidly extinguishing an arc according to claim 2, wherein: the static contact protrudes outwards from the end face of the static reed, and the thickness of the magnetic steel in the direction perpendicular to the end face of the static reed is larger than the protruding height of the static contact on the end face; the height of the magnetic steel is greater than the maximum outer diameter of the static contact.

4. A magnetic latching relay capable of rapidly extinguishing an arc according to claim 1, wherein: a side limiting convex part is arranged on one side of the magnetic steel clamping groove, a lower limiting convex part is arranged at the bottom of the magnetic steel clamping groove and abuts against the lower end of the magnetic steel, and the side limiting convex part abuts against one side of the magnetic steel; the lower end face of the upper cover is provided with an upper limiting convex part which is propped against the upper end of the magnetic steel.

5. A magnetic latching relay capable of rapidly extinguishing an arc according to claim 1, wherein: the lower end face of the upper cover extends downwards to form a positioning column, a matching hole is formed in the middle of the upper cover, a positioning concave hole and a connecting convex portion are respectively formed in the middle of the insulating base, the positioning column is inserted into the positioning concave hole, and the connecting convex portion is matched with the matching hole and is used for pulling the upper cover.

6. A magnetic latching relay capable of rapidly extinguishing an arc according to any one of claims 1 to 5, characterized in that: two groups of static contacts are arranged on the static reed at intervals, two movable reeds are provided, the movable reed support is fixedly connected with the other ends of the two movable reeds, one group of movable contacts is arranged at one end of each of the two movable reeds, and the driving mechanism acts to drive the two movable reeds to act simultaneously so that the two groups of movable contacts and the two groups of static contacts are contacted or separated simultaneously; the insulating base is equipped with a magnet steel draw-in groove on one side of being close to every group stationary contact, all is equipped with the magnet steel in two magnet steel draw-in grooves, and the polarity of two magnet steel opposite faces is established to opposite.

7. The magnetic latching relay capable of rapidly extinguishing an arc according to claim 6, wherein: two static contacts are arranged in each group up and down, two movable contacts are correspondingly arranged in each group, and the height of each magnetic steel is larger than the total distance between the two static contacts on each group of static contacts plus the maximum outer diameter of the two static contacts.

8. The magnetic latching relay capable of rapidly extinguishing an arc according to claim 6, wherein: the magnetic circuit mechanism comprises a coil frame arranged on an insulating base, coils are arranged on the coil frame, two sides of the coil frame are respectively provided with a yoke, an iron core is arranged in a central hole of the coil frame, each yoke comprises a base part axially vertical to the central hole of the coil frame and an attraction part axially parallel to the central hole of the coil frame, the attraction parts are connected with one end of the base part and are vertical to the base parts, two ends of the iron core are respectively connected with the base parts of the two yokes, the two yoke attraction parts are opposite at intervals, a rotating frame is also arranged on the insulating base between the two yoke attraction parts, the rotating frame is provided with an armature and a permanent magnet which are connected with each other, and currents in different directions are introduced through the coils to enable the rotating frame to rotate in different directions and enable the armature and the yoke attraction parts to keep in an attraction state; the driving mechanism comprises a pushing piece, one end of the pushing piece is connected with the rotating frame, and the other end of the pushing piece is connected with the two movable reeds.

9. A magnetic latching relay capable of rapidly extinguishing an arc according to claim 8, wherein: the insulation base is also connected with a wiring port, the wiring port comprises five wiring terminals and an insulation shell connected with the insulation base, and the five wiring terminals are arranged on the insulation shell; the coil frame is provided with three coil terminals, the static reed is electrically connected with one end of a first signal conductive terminal, the movable reed support is electrically connected with one end of a second signal conductive terminal, the three coil terminals are respectively and electrically connected with three wiring terminals, and the other ends of the first signal conductive terminal and the second signal conductive terminal are respectively and electrically connected with the other two wiring terminals.

10. The magnetic latching relay capable of rapidly extinguishing an arc according to claim 9, wherein: the connecting terminal comprises a fixed part, a transition part and a contact pin, wherein one end of the transition part is connected with the fixed part, the other end of the transition part is connected with the contact pin, the contact pin is positioned in the inserting concave hole, all the contact pins are parallel to each other, the transition part is connected with the connecting part and prevents the connecting terminal from rotating relative to the insulating shell, and the fixed part is exposed outside the insulating shell;

transition portion and contact pin are in on the coplanar, the fixed part is mutually perpendicular with transition portion and contact pin, be equipped with the U-shaped draw-in groove on the fixed part, every coil terminal one end and a U-shaped draw-in groove that corresponds on the binding post fixed part pass through interference fit looks joint and form electric connection, the U-shaped draw-in groove that first signal conductive terminal other end and one correspond on the binding post fixed part passes through interference fit looks joint and forms electric connection, the U-shaped draw-in groove that second signal conductive terminal other end and one correspond on the binding post fixed part passes through interference fit looks joint and forms electric connection.