CN219958802U - Contact mechanism - Google Patents

Abstract

The utility model provides a contact mechanism, includes moving contact and two stationary contacts, the stationary contact includes first contact portion, first connecting portion and first wiring portion, and first contact portion, first connecting portion and first wiring portion connect gradually into C type structure, and first contact portion and first wiring portion interval set up relatively, and the both ends of first connecting portion are connected with the one end of first contact portion and first wiring portion respectively, the moving contact includes the contact that both ends all are equipped with the second contact portion, the second contact portion extends to between the first contact portion and the first wiring portion of stationary contact for cooperate with first contact portion, can compromise the wiring convenience of first wiring portion and have longer opening distance between second contact portion and the first contact portion when guaranteeing compact volume.

Description

Contact mechanism

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a contact mechanism.

Background

The contact mechanism of the existing switch electrical appliance is relatively arranged between the moving contact and the fixed contact, such as up-down arrangement, left-right arrangement and the like, and particularly when the moving contact and the fixed contact are relatively arranged up and down, the whole occupied space of the contact mechanism is larger if the opening distance is ensured.

Disclosure of Invention

The object of the present utility model is to overcome at least one of the drawbacks of the prior art and to provide a contact mechanism.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a contact mechanism, includes moving contact and two stationary contacts, the stationary contact includes first contact portion, first connecting portion and first wiring portion, and first contact portion, first connecting portion and first wiring portion connect gradually into C structure, and first contact portion and first wiring portion interval set up relatively, and the both ends of first connecting portion are connected with the one end of first contact portion and first wiring portion respectively, the moving contact includes the contact that both ends all are equipped with second contact portion, second contact portion extends to between the first contact portion and the first wiring portion of stationary contact for with first contact portion cooperation.

Preferably, the openings of the C-shaped structures of the two static contacts are arranged in a back-to-back mode, a first avoidance hole is formed in the first connecting portion, and the second contact portions at the two ends of the contacts respectively penetrate through the first avoidance holes of the two static contacts to be matched with the first contact portions.

Preferably, the second contact parts at the two ends of the contact respectively penetrate through the openings of the C-shaped structures of the two fixed contacts to be matched with the first contact parts; or the openings of the C-shaped structures of the two static contacts are arranged in a back-to-back manner, a notch is arranged on the first connecting part, and the second contact parts at the two ends of the contact respectively penetrate through the notch of the two static contacts to be matched with the first contact part.

Preferably, the fixed contact further comprises a first arc striking part, and the first arc striking part is connected with the first contact part and extends in a direction away from the other fixed contact.

Preferably, the static contact further comprises a second arc striking part, wherein the second arc striking part is connected with the first contact part and extends in the direction opposite to the extending direction of the first arc striking part.

Preferably, the static contact further comprises a first arc striking part and a second arc striking part, the first arc striking part is connected with the first contact part and extends in a direction away from the first connection part, the second arc striking part is connected with the first contact part and extends in a direction opposite to the extending direction of the first arc striking part, and the second arc striking part penetrates through the first avoidance hole.

Preferably, the contact includes a second connection portion, two second contact portions and two second inclined portions, and the two second contact portions are connected with two ends of the second connection portion through the two second inclined portions respectively.

Preferably, the first contact portion is kept away from the one end of first hole of dodging and is equipped with first arcwall face, and the one end that is close to first hole of dodging is equipped with the second arcwall face, and first striking portion is along first arc towards the direction bending extension of keeping away from first connecting portion, second striking portion is along second arc towards the direction slope extension opposite to first striking portion extending direction.

Preferably, a first wiring hole is formed in the first wiring part, and/or a wiring terminal is connected to the first wiring part; and/or the first contact part is provided with a static contact.

Preferably, the moving contact comprises a contact, a contact support and a contact spring, the contact is arranged on the contact support, the contact spring is arranged between the contact and the contact support, and the contact support can move linearly to drive two second contact parts of the contact to contact or separate from the first contact parts of two static contacts; the first avoidance holes are long and strip-shaped, and the length direction of the first avoidance holes is parallel to the moving direction supported by the contact.

The contact mechanism comprises the C-shaped structure composed of the first contact part, the first connecting part and the first wiring part, wherein the second contact part of the moving contact extends to the position between the first contact part and the first wiring part of the moving contact to be matched with the first contact part, so that the size is compact, the wiring convenience of the first wiring part is ensured, and a longer opening distance is reserved between the second contact part and the first contact part.

In addition, be equipped with the preferred scheme in first dodging the hole on the first connecting portion of static contact, the second contact portion of contact passes first dodging the hole and cooperates with the first contact portion of static contact, has small, longer opening and does benefit to the advantage that promotes the excitation magnetic field of the conductive circuit of static contact to the actuating force of electric arc.

Drawings

Fig. 1 is a schematic structural view of a contact mechanism of the present embodiment;

fig. 2 is a sectional view of a moving contact and a fixed contact of the first embodiment;

fig. 3 is another sectional view of the moving contact and the fixed contact of the first embodiment;

FIG. 4 is a schematic diagram of the arc current loop path during opening;

FIG. 5 is a schematic diagram of the action of the excitation magnetic field of the moving and static contact conductive loop on the arc;

fig. 6 is a schematic structural view of the stationary contact of the present embodiment;

fig. 7 is a schematic view of the structure of the contact support of the present embodiment;

fig. 8 is another sectional view of the moving contact and the fixed contact of the first embodiment;

fig. 9 is a schematic structural view of a stationary contact according to a third embodiment.

The elements in the figures are numbered as follows:

the fixed contact 11, the first fixed contact 11A, the second fixed contact 11B, the first contact portion 111, the first connection portion 112, the first connection portion 113, the first striking portion 114, the second striking portion 115, the first escape hole 116, the guide groove 117, the first arc surface 1114, the second arc surface 1115, the first inclined section 1141, the first straight section 1142, the moving contact 12, the contact 120, the second contact portion 121, the third striking portion 122, the second connection portion 123, the contact support 124, the contact mounting groove 1241, the spring mounting groove 1242, the baffle 1243, the chute 1244, the connection hole 1245, the positioning side plate 1246, the second baffle 1247, the third baffle 1248, the second inclined portion 125, the contact spring 126, and the arc extinguishing chamber 14.

Detailed Description

Specific embodiments of the contact mechanism of the present utility model are further described below with reference to the examples shown in the drawings. The contact mechanism of the present utility model is not limited to the description of the embodiments below.

As shown in fig. 1-2, the contact mechanism of the present embodiment is a bridge type double-break contact, and includes a moving contact 12 and two fixed contacts 11, where the two fixed contacts 11 are a first fixed contact 11A and a second fixed contact 11B, respectively, the moving contact 12 includes a contact 120, two ends of the contact 120 are both provided with second contact portions 121, and the two second contact portions 121 are used for matching with the two fixed contacts 11. The moving contact 12 includes a contact 120, a contact support 124, and a contact spring 126, where the contact support 124 is capable of moving linearly, the contact 120 is mounted on the contact support 124, and the contact spring 126 is disposed between the contact 120 and the contact support 124, and is used to fix the contact 120 on the contact support 124 and implement over-travel, so as to ensure reliable contact between the second contact portion 121 and the fixed contact 11. The two fixed contacts 11 are symmetrically arranged at two sides of the contact support 124, the two arc extinguishing chambers 14 are arranged at two sides of the moving contact 12, namely symmetrically arranged at two sides of the contact 120 and the contact support 124, and the two arc extinguishing chambers 14 are respectively arranged at two sides far away from the contact area of the moving contact 12 and the two fixed contacts 11 and symmetrically distributed.

As shown in fig. 2-3 and 6, the stationary contact 11 includes a first contact portion 111, a first connection portion 112, and a first connection portion 113, the first contact portion 111 is configured to mate with a second contact portion 121 of the contact 120, the first connection portion 113 is configured to connect to a power source, and the first connection portion 112 is connected between the first contact portion 111 and the first connection portion 113.

Preferably, a modification point of the contact mechanism of this embodiment is that the first contact portion 111, the first connection portion 112 and the first connection portion 113 are sequentially connected into a C-shaped structure, the first contact portion 111 and the first connection portion 113 are disposed opposite to each other at intervals, two ends of the first connection portion 112 are respectively connected with one ends of the first contact portion 111 and the first connection portion 113, and the second contact portion 121 extends between the first contact portion 111 and the first connection portion 113 of the stationary contact 11 and is used for being matched with the first contact portion 111, so that the compactness of the size can be ensured, and meanwhile, the convenience of connection of the first connection portion 113 and the longer opening distance between the second contact portion 121 and the first contact portion 111 can be considered.

As in the preferred embodiment shown in fig. 1-2, the first contact portion 111 and the first wire connection portion 113 are substantially parallel, a stationary contact is provided on the first contact portion 111, a first wire connection hole is provided on the first wire connection portion 113, and a first relief hole 116 is provided on the first connection portion 112. The second contact portions 121 at two ends of the contact 120 respectively pass through the first avoidance holes 116 of the two fixed contacts 11 to be matched with the first contact portions 111 of the corresponding fixed contacts 11. The openings of the C-shaped structures of the two fixed contacts 11 are arranged in opposite directions, the openings face the corresponding arc extinguishing chambers 14, the two first connecting portions 112 are arranged in parallel at intervals, the two first wiring portions 113 extend in opposite directions, and the two first contact portions 111 extend in opposite directions; the second contact portion 121 of the contact 120 passes through the first avoidance hole 116 and is disposed between the first wiring portion 113 and the first contact portion 111, the contact support 124 drives the contact 120 to move linearly, and the first avoidance hole 116 is elongated to avoid movement of the contact 120. The contact mechanism of the embodiment can ensure compact size, and simultaneously has the advantages of convenient wiring of the first wiring portion 113 and the opening distance between the second contact portion 121 and the first contact portion 111, small size, long opening distance and contribution to improving the driving force of the exciting magnetic field of the conductive loop of the moving contact on the electric arc (specifically, the following description is made with reference to fig. 4-5).

Preferably, the fixed contact 11 is integrally formed and is formed by bending a conductive plate.

Preferably, the fixed contact 11 further includes a first striking portion 114 and a second striking portion 115, where the first striking portion 114 and the second striking portion 115 are connected to the first contact portion 111 and extend in opposite directions, respectively, the first striking portion 114 extends away from the first connecting portion 112, that is, away from the other fixed contact 11 and toward the direction close to the corresponding arc extinguishing chamber 14, and extends to the lower side of the corresponding arc extinguishing chamber 14, and the second striking portion 115 extends in a direction opposite to the extending direction of the first striking portion 114, that is, extends in a direction where the first connecting portion 112 is located, and passes through the first avoiding hole 116.

Preferably, the contact 120 is provided with a third striking portion 122, and the two third striking portions 122 are respectively connected to the two second contact portions 121 and extend in the direction corresponding to the arc extinguishing chamber 14. The contact 120 includes a second connection portion 123 and two second contact portions 121 connected to two ends of the second connection portion 123, a movable contact is disposed on the second contact portion 121, the contact 120 is mounted on a contact support 124 through the second connection portion 123, and two third striking portions 122 are connected to the two second contact portions 121 respectively and extend in directions away from each other.

Preferably, as shown in the embodiment of the contact 120 in fig. 3, the second connection portion 123 and the second contact portion 121 have a drop, the two second contact portions 121 are respectively connected to two ends of the second connection portion 123 through two second inclined portions 125, and the inclined surfaces formed by the inclined second inclined portions 125 may enable the arc to be drawn longer. In particular, the inclined surface of the second inclined portion 125 is opposite to the second striking portion 115, so that the arc can be introduced between the inclined surface and the second striking portion 115 from the moving and static contact area, and the arc can be drawn longer. The second connection portion 123 and the second contact portion 121 have a drop height, and the second contact portion 121 is located at a smaller distance from the second connection portion 123 to the first contact portion 111 in the moving direction of the contact 120, and the inclined surface of the second inclined portion 125 and the second striking portion 115 each extend obliquely in a direction away from each other. The second inclined portion 125 and the second striking portion 115 may be used to cooperate with a contact mechanism provided with a permanent magnet, and cooperate with a magnetic field of the permanent magnet to guide an arc, so as to enhance arc extinguishing performance. Of course, as other embodiments, the second inclined portion 125 and/or the second striking portion 115 may not be provided, such as another embodiment of the contact 120 shown in fig. 8.

As shown in fig. 4, when the contact mechanism of the present embodiment is opened, the arc current loop path of the moving contact 12 and the fixed contact 11 separated is: the first connection portion 113 of the first fixed contact 11A, the first connection portion 112 of the first fixed contact 11A, the first striking portion 114 of the first fixed contact 11A, the third striking portion 122, the contact 120, the other third striking portion 122, the first striking portion 114 of the second fixed contact 11B, the first connection portion 112 of the second fixed contact 11B, and the first connection portion 113 of the second fixed contact 11B. The contact mechanism of the present embodiment includes the first striking portion 114, the second striking portion 115, the third striking portion 122, and the second tilting portion 125, and can rapidly guide the arc to the arc extinguishing chamber, and can be used for a switch with a higher rated current.

In this embodiment, the C-shaped structure of the static contact 11 and the structure that the contact 120 passes through the first avoidance hole 116 are beneficial to improving the arc striking efficiency and the driving force of the excitation magnetic field of the conductive loop of the static contact of the magnetic blowing structure. In addition, the C-shaped structure of the fixed contact 11 and the structure that the contact 120 passes through the first avoidance hole 116 are beneficial to improving the opening distance of the first contact part 111 and the second contact part 121 after opening the brake. As shown in fig. 5, when the switching current is large, the switching is turned on (overloaded or shorted), the force F of the exciting magnetic field of the conductive loop of the moving contact drives the switching arc to move toward the corresponding arc-extinguishing chamber 14 area, the switching arc on the left side of the moving contact 12 moves toward the arc-extinguishing chamber 14 on the left side, the switching arc on the right side of the moving contact 12 moves toward the arc-extinguishing chamber 14 on the right side, and the repulsive force of the large current during the short circuit can be utilized to increase the arc-extinguishing speed.

Preferably, as shown in fig. 2-3, in a preferred specific structure of the arc striking structure, a first arc surface 1114 is disposed at an end of the first contact portion 111 away from the first avoidance hole 116, and a second arc surface 1115 is disposed at an end of the first contact portion close to the first avoidance hole 116; the first arc striking part 114 is bent and inclined along the first arc surface 1114 in a direction away from the second contact part 121, and the second arc striking part 115 is inclined along the second arc surface 1115 in a direction opposite to the first arc striking part 114 and away from the second inclined part 125 through the first avoidance hole 116. The first striking portion 114 includes a first inclined section 1141 and a first straight section 1142, one end of the first striking portion 114 is connected to the first contact portion 111 and extends along the first arc surface 1114 in a bending manner in a direction away from the second contact portion 121, the other end of the first striking portion 114 is connected to the first straight section 1142, the first straight section 1142 corresponds to the arc extinguishing chamber 14, and the first straight section 1142 extends to the lower side of the arc extinguishing chamber 14. The end of the second contact portion 121 is provided with a third arc surface, and the third striking portion 122 is bent and obliquely extended along the third arc surface in a direction away from the first contact portion 111. The end of the second contact portion 121 is provided with a third arc surface, and the third striking portion 122 is bent and obliquely extended along the third arc surface in a direction away from the first contact portion 111. Preferably, the thickness of the first arc striking part 114 and the second arc striking part 115 is smaller than the thickness of the Yu Jing contact 11, and the first arc striking part 114 and the second arc striking part 115 are welded on the fixed contact 11; the thickness of the third striking part 122 is smaller than that of the contact 120, and the third striking part 122 is welded on the second contact part 121 to be close to the movable contact; the first striking part 114, the second striking part 115 and the third striking part 122 are thinner in thickness, have arc extension, and have better striking effect. Preferably, as shown in fig. 2 and 7, in a preferred specific structure of the moving contact 12, the contact support 124 is provided with a contact mounting groove 1241 for mounting the contact 120, a spring mounting groove 1242 for mounting the contact spring 126, the contact mounting groove 1241 communicates with the spring mounting groove 1242, the contact 120 penetrates through the contact mounting groove 1241, the second connecting portion 123 is disposed in the contact mounting groove 1241, the contact 120 is perpendicular to the moving direction of the contact support 124, the contact spring 126 is mounted in the spring mounting groove 1242, the contact spring 126 acts between the middle of the contact 120 and the contact support 124, one end of the contact spring 126 acts on the second connecting portion 123 of the contact 120, and one end acts on the top side wall of the spring mounting groove 1242. Preferably, a connecting hole 1245 may be provided in the contact support 124 for connection with a linkage rod of the drive contact support 124, through which the linkage rod may be connected with a power mechanism of the drive contact support 124, and with an adjacent contact support 124.

Further, as shown in fig. 7, the contact support 124 is provided with an arc isolation structure for isolating two breakpoint arcs at two sides of the contact support 124, so as to effectively avoid mutual interference of the two breakpoint arcs and facilitate movement of the arcs to the arc extinguishing chamber. The arc isolating structure includes a baffle 1243 spaced between the first contact portions 111 of the two stationary contacts 11. In this embodiment, the top end of the baffle 1243 extends into the contact mounting groove 1241 to support the contact 120, the baffle 1243 and the contact spring 126 respectively act on two sides of the second connecting portion 123, and the baffle 1243 is always located between the first contact portions 111 of the two fixed contacts 11 during the linear movement of the contact support 124, whether the contact is switched on or off. Preferably, a sliding groove 1244 is further provided at the bottom of the contact support 124, in this embodiment, the sliding groove 1244 is located at the bottom of the baffle 1243, and the sliding groove 1244 may be used for protruding in the switch electrical apparatus casing, has a function of guiding the sliding of the contact support 124, and may further effectively isolate the breakpoint arcs at two sides. In this embodiment, the lower half of the contact support 124 is used as a baffle 1243, and the contact support 124 extends between the two fixed contacts 11, and in other embodiments, the baffle 1243 includes a protruding portion protruding from a side surface of the contact support 124, and a plane of the protruding portion is perpendicular to the contact 120.

Preferably, two static contact positioning structures for installing the static contacts 11 are arranged on the contact support 124, the two static contacts 11 can be installed and positioned on the static contact positioning structures, the contact 120 penetrates through the contact installation groove 1241 and penetrates through the first avoidance holes 116 of the two static contacts 11, and the static contacts 11 and the moving contacts 12 are installed and positioned through the contact support 124 so as to facilitate the subsequent assembly as a whole. The fixed contact positioning structure may include a corresponding fixing structure such as a groove structure, a protruding rib structure, or a fastening structure, and the fixed contact positioning structure may fix the fixed contact 11 together with the casing of the switching device, which all belong to the protection scope of the present utility model.

Preferably, the contact support 124 in this embodiment is provided with the static contact positioning structure in a protruding manner on two sides perpendicular to the moving direction of the contact support 124, the static contact positioning structure includes two positioning side plates 1246 disposed in parallel at opposite intervals, a gap between the two positioning side plates 1246 is communicated with the contact mounting groove 1241, the contact 120 passes through the two positioning side plates 1246, two side edges of the positioning side plates 1246 are respectively connected with a second baffle 1247 and a third baffle 1248, and the two positioning side plates 1246 at least partially pass through the first avoidance hole 116 of the static contact 11, so that the first connection portion 112 of the static contact 11 is located between the second baffle 1247 and the third baffle 1248. The two positioning side plates 1246 of the present embodiment not only can position the fixed contact 11, but also can be close to the first contact portion 111 of the fixed contact 11, and can also play a role in isolating an arc, i.e. the arc isolating structure includes two positioning side plates 1246. In addition, the third baffle 1248 may be a protruding portion of the partition 1243, and is integrally formed with the partition 1243, that is, the partition 1243 may also be used to limit the stationary contact 11.

The first avoidance hole 116 of the fixed contact 11 is elongated, and the length direction of the first avoidance hole 116 is parallel to the moving direction of the contact support 124, that is, parallel to the direction from the first contact portion 111 to the first connection portion 113, for avoiding the movement of the contact 120, so that the second contact portion 121 moves between the first contact portion 111 and the first connection portion 113. In this embodiment, the first avoidance hole 116 is rectangular, and two guide grooves 117 are provided at the connection position between the first contact portion 111 of the fixed contact 11 and the first avoidance hole 116 of the first connection portion 112, so that the bottom sides of the two positioning side plates 1246 penetrate through, and at least part of the side edges of the positioning side plates 1246 extend into the guide grooves 117 to be slidably matched. The second arc surface 1115 of the first contact portion 111 is located between the two guide grooves 117, and the second arc striking portion 115 passes through the first avoiding hole 116.

As another embodiment, the first connection portion 112 of the fixed contact 11 may not be provided with the first avoidance hole 116, but a notch may be provided on the first connection portion 112. For example, in a second embodiment of the static contact 11 (not shown in the figure, refer to fig. 9), the static contact 11 includes a first contact portion 111, a first connection portion 112, and a first connection portion 113, where the first contact portion 111, the first connection portion 112, and the first connection portion 113 are sequentially connected to form a C-shaped structure, the openings of the C-shaped structures of the two static contacts 11 are opposite, and face the respective arc extinguishing chambers 14, a notch is formed on one side edge of the first connection portion 112, and the second contact portions 121 at two ends of the contact 120 respectively pass through the notch and are matched with the first contact portion 111, which also can ensure compact volume, and meanwhile, the connection convenience of the first connection portion and the longer opening distance between the second contact portion and the first contact portion are considered.

As shown in fig. 9, in the third embodiment of the static contact 11, the static contact 11 includes a first contact portion 111, a first connection portion 112, and a first connection portion 113, where the first contact portion 111, the first connection portion 112, and the first connection portion 113 are sequentially connected to form a C-type structure, and the openings of the C-type structures of the two static contacts 11 are not disposed toward the arc extinguishing chamber 14 in fig. 1, but disposed toward the direction perpendicular to the paper surface in fig. 1, so that the first connection portion 112 is disposed in a dislocation manner with the first contact portion 111 and the first connection portion 113 along the direction perpendicular to the paper surface in fig. 1, and corresponds to that the side of the first connection portion 112 near the first contact portion 111 and the first connection portion 113 has openings, and the second contact portions 121 at two ends of the contact 120 respectively pass through the openings of the C-type structures of the two static contacts 11 to be matched with the first contact portion 111. In addition, the first contact portion 111 and the first connection portion 113 of the fixed contact 11 in this embodiment may be provided with a certain protrusion in the direction of the arc extinguishing chamber 14, and may also be provided with a first arc striking portion 114 and a second arc striking portion 115, which are not repeated.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (10)

1. The utility model provides a contact mechanism, includes moving contact (12) and two static contacts (11), static contact (11) are including first contact portion (111), first connecting portion (112) and first wiring portion (113), first contact portion (111), first connecting portion (112) and first wiring portion (113) connect gradually into C type structure, first contact portion (111) and first wiring portion (113) interval set up relatively, the both ends of first connecting portion (112) are connected with one end of first contact portion (111) and first wiring portion (113) respectively, moving contact (12) are including contact (120) that both ends all are equipped with second contact portion (121), its characterized in that: the second contact part (121) extends between the first contact part (111) and the first wiring part (113) of the fixed contact (11) and is used for being matched with the first contact part (111).

2. The contact mechanism of claim 1, wherein: the openings of the C-shaped structures of the two fixed contacts (11) are arranged in a back-to-back mode, a first avoidance hole (116) is formed in the first connecting portion (112), and second contact portions (121) at two ends of the contact (120) respectively penetrate through the first avoidance holes (116) of the two fixed contacts (11) to be matched with the first contact portions (111).

3. The contact mechanism of claim 1, wherein: the second contact parts (121) at the two ends of the contact (120) respectively penetrate through openings of C-shaped structures of the two fixed contacts (11) to be matched with the first contact parts (111); or, the openings of the C-shaped structures of the two static contacts (11) are arranged in opposite directions, a notch is arranged on the first connecting part (112), and the second contact parts (121) at the two ends of the contact (120) respectively penetrate through the notches of the two static contacts (11) to be matched with the first contact parts (111).

4. The contact mechanism of claim 1, wherein: the fixed contact (11) further comprises a first striking part (114), and the first striking part (114) is connected with the first contact part (111) and extends in a direction away from the other fixed contact (11).

5. The contact mechanism of claim 4, wherein: the stationary contact (11) further comprises a second striking part (115), wherein the second striking part (115) is connected with the first contact part (111) and extends in the direction opposite to the extending direction of the first striking part (114).

6. The contact mechanism of claim 2, wherein: the static contact (11) further comprises a first arc striking part (114) and a second arc striking part (115), wherein the first arc striking part (114) is connected with the first contact part (111) and extends in a direction away from the first connecting part (112), the second arc striking part (115) is connected with the first contact part (111) and extends in a direction opposite to the extending direction of the first arc striking part (114), and the second arc striking part (115) penetrates through the first avoidance hole (116).

7. The contact mechanism of claim 1, wherein: the contact (120) comprises a second connecting part (123), two second contact parts (121) and two second inclined parts (125), wherein the two second contact parts (121) are respectively connected with two ends of the second connecting part (123) through the two second inclined parts (125).

8. The contact mechanism of claim 6, wherein: the one end that hole (116) was dodged to first contact portion (111) was kept away from to first, is equipped with first arcwall face (1114), and the one end that is close to first hole (116) of dodging is equipped with second arcwall face (1115), and first striking portion (114) are buckled along first arcwall face (1114) to the direction of keeping away from first connecting portion (112) and are extended, second striking portion (115) are along second arcwall face (1115) to the direction slope opposite to first striking portion (114) extending direction.

9. The contact mechanism of claim 1, wherein: the first wiring part (113) is provided with a first wiring hole, and/or the first wiring part (113) is connected with a wiring terminal; and/or, the first contact part (111) is provided with a stationary contact.

10. The contact mechanism of claim 2, wherein: the movable contact (12) comprises a contact (120), a contact support (124) and a contact spring (126), wherein the contact (120) is arranged on the contact support (124), the contact spring (126) is arranged between the contact (120) and the contact support (124), and the contact support (124) can move linearly to drive two second contact parts (121) of the contact (120) to contact or separate from the first contact parts (111) of two fixed contacts (11); the first avoidance hole (116) is long and strip-shaped, and the length direction of the first avoidance hole (116) is parallel to the moving direction of the contact support (124).