Contact structure

Abstract

The utility model discloses a contact structure, which is accommodated in an accommodating cavity of a shell, and comprises a rotating piece, a first moving contact, a second moving contact, a first connecting piece and a second connecting piece, a first static contact; a second static contact; the third static contact comprises a first supporting leg and a second supporting leg; when the rotating piece is rotated, in a first state, one end of the first moving contact is connected with the second static contact, and the other end of the first moving contact is connected with the first supporting foot; in the second state, one end of the second moving contact is connected with the first static contact, and the other end of the second moving contact is connected with the second supporting foot; an electrical connection effect between the static contact and the moving contact is formed by adopting a lap joint mode, and ablation caused by electric arc is avoided; the first moving contact and the second moving contact form a double-breakpoint effect, so that interference phenomena such as creepage are not easy to occur in the switching process, the effects of breaking arc and pulling low temperature rise are also formed, the structure is more stable, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to a contact structure. Background Art

[0002] Different switches have different contact structures. The contact structures of dual power conversion switches and double throw disconnectors are similar, and the only difference is the operating mechanism. The existing contact structure includes a moving contact and a stationary contact. The moving contact is a clamping structure, that is, a clamping groove is formed at the end of the moving contact. The moving contact rotates so that the stationary contact is inserted into the clamping groove to form an insertion connection, thereby achieving an electrical connection effect between the moving contact and the stationary contact.

[0003] However, there is a problem with the plug-in connection. During the plug-in and unplugging process, an electric arc will be generated. The generated arc will burn the contact surface of the contact, causing the contact surface to deform. Some deformed contact surfaces will affect the next plug-in connection. Specifically, the height of the deformed static contact is greater than the height of the clamping groove; or, the height of the clamping groove of the deformed moving contact becomes smaller. The above deformations will make it impossible for the static contact to be inserted into the clamping groove, thereby failing to form a closing effect, resulting in closing failure, which seriously affects the normal use of the product. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is how to prevent arc erosion from affecting the connection between the moving and static contacts. To this end, a contact structure is accommodated in a housing cavity of a housing, comprising:

[0005] A rotating member, wherein the first moving contact and the second moving contact are fixed to the rotating member;

[0006] First static contact;

[0007] The second static contact;

[0008] A third stationary contact, the third stationary contact comprising a first leg and a second leg;

[0009] Rotate the rotating part, in a first state, one end of the first moving contact is connected to the second static contact, the other end of the first moving contact is connected to the first leg, and the second moving contact is located in an idle position; in a second state, one end of the second moving contact is connected to the first static contact, the other end of the second moving contact is connected to the second leg, and the first moving contact is located in an idle position.

[0010] It also includes an isolating member, wherein the first moving contact, the second stationary contact, and the first leg are located on one side of the isolating member; and the second moving contact, the first stationary contact, and the second leg are located on the other side of the isolating member.

[0011] The isolating member is connected to the accommodating cavity by bolts or snaps.

[0012] The accommodating cavity is provided with a fixing column, the isolating piece is provided with a first through hole, and a bolt passes through the first through hole and is connected with the fixing column.

[0013] The accommodating cavity is provided with a reinforcing rib, one end of the reinforcing rib is connected to the side surface of the fixing column, and the other end of the reinforcing rib is connected to the inner wall of the accommodating cavity.

[0014] The reinforcing rib is provided with a limiting protrusion, and the limiting protrusion abuts against the side wall of the isolation member.

[0015] The rotating member is fixed with two energy storage members, and the two energy storage members are respectively matched with the first moving contact and the second moving contact.

[0016] The rotating member is provided with two mutually independent fixed cavities, and the energy storage member is accommodated in the fixed cavities.

[0017] The fixed cavity is Z-shaped, and the first moving contact and the second moving contact are both provided with fixing holes. The energy storage component includes a first fixing portion, a first oblique portion, a first horizontal portion, a second oblique portion and a second fixing portion. One end of the first oblique portion is vertically connected to the first fixing portion, and the other end of the first oblique portion is connected to one end of the first horizontal portion. One end of the second oblique portion is connected to the other end of the first horizontal portion, and the other end of the second oblique portion is vertically connected to the second fixing portion. The first fixing portion and the second fixing portion extend to the corresponding fixing holes, and the first oblique portion, the first horizontal portion, and the second oblique portion are all in contact with the bottom surface of the fixed cavity.

[0018] The rotating member is provided with an isolating portion, and the isolating portion is located between the first moving contact and the second moving contact.

[0019] The first stationary contact is provided with a first matching portion, the second stationary contact is provided with a second matching portion, the first leg is provided with a third matching portion, the second leg is provided with a fourth matching portion, and the first matching portion, the second matching portion, the third matching portion, and the fourth matching portion are arranged in parallel.

[0020] The two ends of the first moving contact face different directions; the two ends of the second moving contact face different directions.

[0021] The contact parts of the first moving contact and the second moving contact located on the same side have different directions.

[0022] It also includes an arc extinguishing component, which is located on the movement trajectory of the first moving contact and the second moving contact.

[0023] The shell is provided with heat dissipation holes.

[0024] The technical solution of the utility model has the following advantages:

[0025] 1. The utility model provides a contact structure, which adopts this structural setting. First, the electrical connection effect between the static contact and the moving contact is formed by overlapping, avoiding the ablation caused by the arc, which affects the subsequent electrical connection; secondly, the first moving contact and the second moving contact form a double breakpoint effect, which makes it difficult to cause interference such as creepage during the switching process. At the same time, the setting of the double breakpoint also forms the effect of breaking the arc and reducing the temperature rise. Compared with the existing technology, this structure is more stable and has a longer service life.

[0026] 2. The utility model provides a contact structure, in which the isolating member forms an upper and lower isolation effect, so that a separation is formed between the first state and the second state, thereby improving the arc extinguishing effect of the arc generated during the switching process. In addition, the rotatable partition can cooperate with the moving contact, and the rotatable partition can extend between the moving contact and the static contact to achieve the arc cutting.

[0027] 3. The utility model provides a contact structure in which the isolating piece can be connected and fixed to the accommodating cavity in different ways, thereby improving the firmness and stability of the fixation during use.

[0028] 4. The contact structure provided by the utility model adopts a bolt fixing method to further improve the fixing effect between the isolation member and the fixing column.

[0029] 5. The utility model provides a contact structure, wherein the reinforcing ribs serve to strengthen the strength of the fixing column, thereby preventing the fixing column from breaking during use.

[0030] 6. The utility model provides a contact structure in which the limiting protrusion forms a limiting and fixing effect, making it more convenient to install and fix the isolating piece.

[0031] 7. The utility model provides a contact structure, which forms a one-to-one matching effect through the arrangement of an energy storage component. The energy storage component applies pressure to the contact, making the electrical connection more stable.

[0032] 8. The contact structure provided by the utility model forms a separation effect through two independent fixing cavities, which better satisfies the one-to-one matching effect.

[0033] 9. The utility model provides a contact structure, which firstly forms a Z-shaped connection effect by setting the shape of the fixed cavity. Secondly, the energy storage component adopts this structural setting. After the energy storage component cooperates with the moving contact, it forms the effect of fixing and giving contact pressure. Compared with the reed structure, this structure is simpler in structure, more convenient to install, and can provide better contact pressure.

[0034] 10. The utility model provides a contact structure, and the setting of the isolation part forms a certain isolation effect. Here, the isolation part also cooperates with the accommodating cavity to form a positioning and fixing effect.

[0035] 11. The utility model provides a contact structure, and the arrangement of the matching part enables the moving contact and the static contact to fit better to form an electrical connection effect.

[0036] 12. The utility model provides a contact structure, in which the arc extinguishing component has an arc extinguishing effect, so that the arc generated during the breaking process can be extinguished.

[0037] 13. The utility model provides a contact structure and a heat dissipation hole to form a heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of a contact structure provided by the utility model;

[0040] Figure 2 A schematic diagram of a contact structure provided by the utility model;

[0041] Figure 3 A cross-sectional view of a contact structure provided by the utility model;

[0042] Figure 4 A partial front view of a contact structure provided by the utility model;

[0043] Figure 5 A partial rear view of a contact structure provided by the utility model;

[0044] Figure 6 A partial front view of a contact structure provided by the utility model;

[0045] Figure 7A schematic diagram of a contact structure provided by the utility model;

[0046] Figure 8 A schematic diagram of the structure of the rotating member, the first moving contact and the second moving contact provided by the utility model;

[0047] Fig. 9 for Figure 8 A cross-sectional view of

[0048] Fig.10 A schematic diagram of the structure of the energy storage element and the first moving contact provided by the utility model;

[0049] Fig.11 This is a schematic structural diagram of the energy storage component provided by the utility model.

[0050] Description of reference numerals:

[0051] 11. Shell; 12. Rotating member; 13. First moving contact; 14. Second moving contact; 15. First stationary contact; 16. Second stationary contact; 17. Third stationary contact; 18. Isolation member; 19. Energy storage member; 20. Arc extinguishing assembly; 111. Accommodating cavity; 112. Fixed column; 113. Reinforcement rib; 114. Position limiting protrusion; 115. Heat dissipation hole; 121. Fixed cavity; 122. Isolation part; 123. Driving groove; 124. Driving protrusion; 131. Fixed hole; 132, first contact part; 133, second contact part; 141, third contact part; 142, fourth contact part; 151, first matching part; 161, second matching part; 171, first leg; 172, second leg; 181, first through hole; 191, first fixing part; 192, first oblique part; 193, first horizontal part; 194, second oblique part; 195, second fixing part; 1711, third matching part; 1721, fourth matching part. DETAILED DESCRIPTION

[0052] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0053] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0056] Example 1

[0057] This embodiment provides a contact structure, as shown in the attached Figure 1-11 As shown, a housing cavity 111 is accommodated in the housing 11. The contact structure in this embodiment can be applied to a dual power conversion switch or a double-throw isolating switch, and those skilled in the art can adjust it according to actual needs. The number of phase lines of the switch is different, and there can be two phases or three phases. The contact structure corresponding to each phase line is the same, so in this embodiment, only one group of phase lines is described, where the phase lines can be accommodated in a housing cavity 111, or a unit modular setting can be formed, that is, one unit module corresponds to one phase line. In this embodiment, only the unit module is described, and the housing 11 of the unit module is provided with a housing cavity 111.

[0058] The contact structure includes:

[0059] The rotating member 12 is fixed with a first moving contact 13 and a second moving contact 14. The rotating member 12 is linked with the first moving contact 13 and the second moving contact 14. When the rotating member 12 rotates, the first moving contact 13 and the second moving contact 14 also rotate accordingly. In this embodiment, the first moving contact 13 and the second moving contact 14 are arranged up and down.

[0060] The first stationary contact 15 is partially located in the accommodating cavity 111 , and the rest of the first stationary contact 15 extends to the outside, so as to form an electrical connection with an external circuit.

[0061] The second stationary contact 16 is partially located in the accommodating cavity 111 , and the rest of the second stationary contact 16 extends to the outside, so as to form an electrical connection with an external circuit.

[0062] The third static contact 17 is a common terminal, that is, after the third static contact 17 is electrically connected with the first static contact 15, a group of circuits is formed. When the third static contact 17 is electrically connected with the second static contact 16, another group of circuits is formed. It can also be understood that the two groups of circuits correspond to the common circuit and the standby circuit respectively. Part of the third static contact 17 is located in the accommodating cavity 111, and the rest of the third static contact 17 extends to the outside to form an electrical connection with the external circuit. The part of the third static contact 17 located in the accommodating cavity 111 includes a first leg 171 and a second leg 172, and the first leg 171 and the second leg 172 are arranged up and down. In this embodiment, the first static contact 15 and the second static contact 16 are located on the same side, and the third static contact 17 is located on the opposite side. Specifically, the first static contact 15 and the second static contact 16 are located on the right side, and the third static contact 17 is located on the left side.

[0063] Rotate the rotating member 12, in the first state, one end of the first moving contact 13 is overlapped with the second static contact 16, and the other end of the first moving contact 13 is overlapped with the first leg 171. At this time, the second static contact 16 is electrically connected with the third static contact 17 through the first moving contact 13 to form an electrical circuit, and the second moving contact 14 is in an idle position. Specifically, the second moving contact 14 is completely separated from the second leg 172 and the first static contact 15. Rotate the rotating member 12, in the second state, one end of the second moving contact 14 is overlapped with the first static contact 15, and the other end of the second moving contact 14 is overlapped with the second leg 172. At this time, the first static contact 15 is electrically connected with the third static contact 17 through the second moving contact 14 to form another electrical circuit, and the first moving contact 13 is in an idle position. Specifically, the first moving contact 13 is completely separated from the first leg 171 and the second static contact 16. In this embodiment, overlapping specifically means, for example, when the rotating member 12 rotates, the end of the first moving contact 13 and the second static contact 16 abut against each other to form an electrical connection effect, rather than the plug-in fit in the prior art. With this structural setting, firstly, an overlapping method is adopted to form an electrical connection effect between the static contact and the moving contact, thereby avoiding the ablation caused by the arc and affecting the subsequent electrical connection; secondly, the first moving contact 13 and the second moving contact 14 form a double breakpoint effect, so that creepage and other interference phenomena are not likely to occur during the switching process. At the same time, the setting of the double breakpoint also forms the effect of breaking the arc and reducing the temperature rise. Compared with the prior art, this structure is more stable and has a longer service life.

[0064] Specifically, as attached Figure 3-5 As shown, the isolating member 18 is also included, and the first moving contact 13, the second static contact 16, and the first leg 171 are located on one side of the isolating member 18; the second moving contact 14, the first static contact 15, and the second leg 172 are located on the other side of the isolating member 18. In this embodiment, the first moving contact 13, the second static contact 16, and the first leg 171 are located on the upper side of the isolating member 18, and the second moving contact 14, the first static contact 15, and the second leg 172 are located on the lower side of the isolating member 18. In this embodiment, it specifically refers to the first static contact 15, the second static contact 16, the first leg 171, and the second leg 172 extending into the accommodating cavity 111 forming an upper and lower isolation effect through the isolating member 18. The isolating member 18 forms an upper and lower isolation effect, so that a separation is formed between the first state and the second state, and the arc extinguishing effect of the arc generated during the switching process is improved. In addition, the arc can be cut off by cooperating with the moving contact through a rotatable partition extending between the moving contact and the stationary contact.

[0065] Specifically, as attached Figure 3-5As shown, the isolating member 18 is connected to the accommodating chamber 111 by bolts or snaps. The isolating member 18 can be connected and fixed to the accommodating chamber 111 in different ways to improve the firmness and stability of the fixation during use. Here, the isolating member 18 does not completely separate the accommodating chamber 111 to form two independent cavities, and the two cavities are still connected. In addition, the isolating member 18 can also be directly injection molded as one piece with the shell 11.

[0066] Specifically, as attached Figure 3-6 As shown, the accommodating cavity 111 is provided with a fixing column 112, and the isolating member 18 is provided with a first through hole 181, and the bolt passes through the first through hole 181 to connect with the fixing column 112. The bolt fixing method is adopted to further improve the fixing effect between the isolating member 18 and the fixing column 112. The number of the fixing columns 112 here can be adjusted according to actual needs. In this embodiment, the isolating member 18 is specifically an insulating flat plate structure. In addition, it should be noted that a hole is provided in the middle of the isolating member 18, and the rotating member 12 can pass through the hole of the isolating member 18.

[0067] Specifically, as attached Figure 3-7 As shown, a gap is formed between the first supporting leg 171 and the second supporting leg 172 , and the isolating member 18 is inserted into the gap to form a separation effect between the first supporting leg 171 and the second supporting leg 172 .

[0068] Specifically, as attached Figure 3-6 As shown, the accommodating cavity 111 is provided with a reinforcing rib 113, one end of the reinforcing rib 113 is connected to the side of the fixing column 112, and the other end of the reinforcing rib 113 is connected to the inner wall of the accommodating cavity 111. The reinforcing rib 113 serves to strengthen the strength of the fixing column 112 and prevent the fixing column 112 from breaking during use. One fixing column 112 can be matched with two or more reinforcing ribs 113 to improve the strength of the fixing column 112.

[0069] Specifically, as attached Figure 3-6 As shown, the reinforcing rib 113 is provided with a limiting protrusion 114, and the limiting protrusion 114 abuts against the side wall of the isolating member 18. The limiting protrusion 114 forms a limiting and fixing effect, making it more convenient to install and fix the isolating member 18. In this embodiment, the limiting protrusion 114 abuts against the outer side wall of the isolating member 18. During the installation process, the limiting protrusion 114 is first abutted against the side wall of the isolating member 18, and then the isolating member 18 is connected and fixed to the fixing column 112 through the bolt, thereby achieving the fixing effect of the isolating member 18.

[0070] Specifically, as attached Figure 3 , 8As shown in Figure 11, the rotating member 12 is fixed with two energy storage members 19, which are respectively matched with the first moving contact 13 and the second moving contact 14, one energy storage member 19 is matched with the first moving contact 13, and the other energy storage member 19 is matched with the second moving contact 14. The energy storage member 19 is used to apply pressure to the contact to make the electrical connection more stable. The energy storage member 19 can be a spring or a reed or other structure.

[0071] Specifically, as attached Figure 3 , 8 -11, the rotating member 12 is provided with two independent fixed cavities 121, and the energy storage member 19 is accommodated in the fixed cavity 121. The two independent fixed cavities 121 form a separation effect, which better satisfies the one-to-one matching effect. It should be noted that the first moving contact 13 and the second moving contact 14 are respectively accommodated in the corresponding fixed cavities 121, that is, the upper fixed cavity 121 cooperates with the first moving contact 13, and the lower fixed cavity 121 cooperates with the second moving contact 14.

[0072] Specifically, as attached Figure 3 , 8-11, the fixed cavity 121 is Z-shaped, and the fixed cavity 121 forms two openings, with a Z-shaped middle connecting part in the middle, and two corners are formed in the middle position of the fixed cavity 121. The first moving contact 13 and the second moving contact 14 are both provided with a fixing hole 131. The first moving contact 13 and the second moving contact 14 have similar structures, so only the first moving contact 13 is described in this embodiment, and the first moving contact 13 is provided with two fixing holes 131. The energy storage member 19 includes a first fixed portion 191, a first oblique portion 192, a first horizontal portion 193, a second oblique portion 194 and a second fixed portion 195. One end of the first oblique portion 192 is vertically connected to the first fixed portion 191. Here, the vertical connection specifically means that the first fixed portion 191 is vertically upward, the first oblique portion 192 is located on a horizontal plane, and the other end of the first oblique portion 192 is connected to one end of the first horizontal portion 193. Here, the first oblique portion 192 and the first horizontal portion 193 are both located on a horizontal plane. One end of the second oblique portion 194 is connected to the other end of the first horizontal portion 193. The first oblique portion 192, the first horizontal portion 193, and the second oblique portion 194 form a Z-shaped structure. The other end of the second oblique portion 194 is vertically connected to the second fixed portion 195, and the second fixed portion 195 also extends vertically upward to form an effect parallel to the first fixed portion 191. The two have the same orientation and the same length. When the energy storage component 19, the first moving contact 13 and the fixed cavity 121 are matched, the first fixed portion 191 and the second fixed portion 195 extend to the corresponding fixed hole 131, forming a fixed matching effect between the energy storage component 19 and the first moving contact 13. Then, the fixed first moving contact 13 and the energy storage component 19 are installed into the fixed cavity 121. At this time, the first horizontal portion 193 is matched with the middle position of the Z-shaped structure of the fixed cavity 121. The connection between the first horizontal portion 193 and the first oblique portion 192 is located at the corner position of the fixed cavity 121. The connection between the first horizontal portion 193 and the second oblique portion 194 is located at another corner position of the fixed cavity 121, forming a limited fixing effect. At the same time, the first oblique portion 192, the first horizontal portion 193, and the second oblique portion 194 are all in contact with the bottom surface of the fixed cavity 121. The two ends of the installed first moving contact 13 extend to the outside of the fixed cavity 121. At this time, the energy storage component 19 applies contact pressure to the first moving contact 13, so that the first moving contact 13 is maintained in a stable position. When the first moving contact 13 overlaps and fits with the static contact, the energy storage component 19 will undergo a certain deformation, and the energy storage component 19 releases energy. In this embodiment, the first moving contact 13 is a double breakpoint structure. The first moving contact 13 rotates relative to the rotating member 12. The two ends of the first moving contact 13 are respectively subjected to the forces of the second static contact 16 and the first support leg 171. However, the force applied by the second static contact 16 to the first moving contact 13 is opposite to the direction of the force applied by the first support leg 171 to the first moving contact 13. In addition, the contact pressure applied by the energy storage member 19 can better achieve the stability of the electrical connection and prevent circuit instability.First, the shape of the fixed cavity 121 is set to form a Z-shaped connection effect. Secondly, the energy storage member 19 adopts this structural setting. After the energy storage member 19 cooperates with the moving contact, it forms a fixing effect and gives contact pressure. Compared with the spring or reed structure, this structure requires a plurality of springs to correspond to one moving contact, and the rotating member 12 needs to be equipped with a structure that cooperates with the spring. When installing, a lot of force is needed to overcome the elastic restoring force of the spring. In this embodiment, the energy storage member 19 is set one-to-one, the structure is simpler, the installation is more convenient, and it can give better contact pressure to ensure the stability of the electrical connection.

[0073] Specifically, as attached Figure 3 , 8 As shown in FIG. 11 , the rotating member 12 is provided with an isolating portion 122, which is a convex ring structure extending outward. The isolating portion 122 is located between the two fixed cavities 121, that is, the isolating portion 122 is located between the first moving contact 13 and the second moving contact 14. The setting of the isolating portion 122 forms a certain isolation effect. Here, the isolating portion 122 also cooperates with the accommodating cavity 111 to form a positioning and fixing effect.

[0074] Specifically, as attached Figure 4-7As shown, the first stationary contact 15 is provided with a first matching portion 151, which is located at the portion where the first stationary contact 15 extends into the accommodating cavity 111, and the first matching portion 151 is located below the isolating member 18. The second stationary contact 16 is provided with a second matching portion 161, which is located at the portion where the second stationary contact 16 extends into the accommodating cavity 111, and the second matching portion 161 is located above the isolating member 18. The first leg 171 is provided with a third matching portion 1711, which is located at the portion where the first leg 171 extends into the accommodating cavity 111, and the third matching portion 1711 is located above the isolating member 18. The second leg 172 is provided with a fourth matching portion 1721, which is located at the portion where the second leg 172 extends into the accommodating cavity 111, and the fourth matching portion 1721 is located below the isolating member 18. The first matching part 151, the second matching part 161, the third matching part 1711, and the fourth matching part 1721 are arranged in parallel. In this embodiment, the first matching part 151, the second matching part 161, the third matching part 1711, and the fourth matching part 1721 are all arranged longitudinally, and the first static contact 15, the second static contact 16, and the third static contact 17 extending outside the accommodating cavity 111 are arranged horizontally and transversely. The arrangement of the matching part allows the moving contact and the static contact to fit better to form an electrical connection effect. In this embodiment, the first matching part 151 is located at the upper right position of the accommodating cavity 111, the second matching part 161 is located at the lower right position of the accommodating cavity 111, the third matching part 1711 is located at the upper middle of the left side of the accommodating cavity 111, and the fourth matching part 1721 is located at the lower middle of the left side of the accommodating cavity 111. This structure forms an upper and lower isolation structure, forming a distribution of three corners, which do not interfere with each other and do not affect each other.

[0075] Specifically, as attached Figure 4-7 As shown, the two ends of the first moving contact 13 are oriented in different directions, and the two ends of the second moving contact 14 are oriented in different directions. In this embodiment, for better description, the two ends of the first moving contact 13 are respectively the first contact part 132 and the second contact part 133. For example, the first contact part 132 faces the left side, and the second contact part 133 faces the right side, forming two different directions. The first contact part 132 is used to overlap with the third matching part 1711 of the first leg 171, and the second contact part 133 is used to overlap with the second matching part 161 of the second static contact 16. The two ends of the second moving contact 14 are respectively the third contact part 141 and the fourth contact part 142. For example, the third contact part 141 faces the left side, and the fourth contact part 142 faces the right side, forming two different directions. The third contact part 141 is used to overlap with the fourth matching part 1721 of the second leg 172, and the fourth contact part 142 is used to overlap with the first matching part 151 of the first static contact 15.

[0076] Specifically, as attached Figure 4-7 As shown, the contact parts of the first moving contact 13 and the second moving contact 14 on the same side have different orientations. For example, the first contact part 132 is matched with the third matching part 1711, and the third contact part 141 is matched with the fourth matching part 1721. The first contact part 132 is facing the left side, and the third contact part 141 is facing the right side. Furthermore. The matching surfaces of the first contact part 132, the second contact part 133, the third contact part 141, and the fourth contact part 142 are arc surfaces. Silver dots can also be welded on the first matching part 151, the second matching part 161, the third matching part 1711, and the fourth matching part 1721 to improve the switching ability, that is, the arc surface fits with the corresponding matching part to form an electrical connection effect.

[0077] Specifically, as attached Figure 4-7 As shown, the arc extinguishing assembly 20 is also included, and the arc extinguishing assembly 20 is located on the movement trajectory of the first moving contact 13 and the second moving contact 14. The arc extinguishing assembly 20 has an arc extinguishing effect, so that the arc generated during the breaking process can be extinguished. In this embodiment, the number of arc extinguishing assemblies 20 is four, and the four arc extinguishing assemblies 20 are respectively located on the movement trajectories of the first contact part 132, the second contact part 133, the third contact part 141, and the fourth contact part 142.

[0078] Specifically, as attached Figure 1-2 As shown, the housing 11 is provided with heat dissipation holes 115. The provision of the heat dissipation holes 115 forms a heat dissipation effect. Here, the housing 11 is formed by splicing two parts, and the heat dissipation holes 115 can be respectively provided on the two parts, or the heat dissipation holes 115 can be formed by splicing two parts.

[0079] Specifically, a rotating shaft may pass through two adjacent unit modules to form a linkage effect between two adjacent rotating members 12; or two adjacent unit modules may be matched through the rotating member 12, that is, one end of the rotating member 12 is a driving groove 123, and the other end of the rotating member 12 is a driving protrusion 124 that matches with the driving groove 123, wherein the driving groove 123 of one unit module matches with the driving protrusion 124 of the adjacent unit module to form a linkage effect between two adjacent rotating members 12.

[0080] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A contact structure, accommodated in a housing cavity (111) of a housing (11), characterized in that: It includes: A rotating member (12), wherein the rotating member (12) is fixed with a first moving contact (13) and a second moving contact (14); A first stationary contact (15); A second stationary contact (16); A third stationary contact (17), the third stationary contact (17) comprising a first leg (171) and a second leg (172); The rotating member (12) is rotated, in a first state, one end of the first moving contact (13) is connected to the second stationary contact (16), the other end of the first moving contact (13) is connected to the first support leg (171), and the second moving contact (14) is located in an idle position; in a second state, one end of the second moving contact (14) is connected to the first stationary contact (15), the other end of the second moving contact (14) is connected to the second support leg (172), and the first moving contact (13) is located in an idle position.

2. The contact structure according to claim 1, characterized in that: It also includes an isolating member (18), wherein the first moving contact (13), the second stationary contact (16), and the first leg (171) are located on one side of the isolating member (18); and the second moving contact (14), the first stationary contact (15), and the second leg (172) are located on the other side of the isolating member (18).

3. The contact structure according to claim 2, characterized in that: The isolating member (18) and the accommodating chamber (111) are connected by bolts or snaps.

4. The contact structure according to claim 3, characterized in that: The accommodating cavity (111) is provided with a fixing column (112), the isolating piece (18) is provided with a first through hole (181), and a bolt passes through the first through hole (181) and is connected to the fixing column (112).

5. The contact structure according to claim 4, characterized in that: The accommodating cavity (111) is provided with a reinforcing rib (113), one end of the reinforcing rib (113) is connected to the side surface of the fixing column (112), and the other end of the reinforcing rib (113) is connected to the inner wall of the accommodating cavity (111); the reinforcing rib (113) is provided with a limiting protrusion (114), and the limiting protrusion (114) abuts against the side wall of the isolation member (18).

6. The contact structure according to claim 1, characterized in that: The rotating member (12) is fixed with two energy storage members (19), and the two energy storage members (19) respectively cooperate with the first moving contact (13) and the second moving contact (14).

7. The contact structure according to claim 6, characterized in that: The rotating member (12) is provided with two mutually independent fixed cavities (121), and the energy storage member (19) is accommodated in the fixed cavities (121).

8. The contact structure according to claim 7, characterized in that: The fixing cavity (121) is Z-shaped, the first moving contact (13) and the second moving contact (14) are both provided with fixing holes (131), the energy storage member (19) comprises a first fixing portion (191), a first oblique portion (192), a first horizontal portion (193), a second oblique portion (194) and a second fixing portion (195), one end of the first oblique portion (192) is vertically connected to the first fixing portion (191), and the other end of the first oblique portion (192) is connected to the first horizontal portion (193). The first horizontal portion (193) is connected to one end of the second inclined portion (194), one end of the second inclined portion (194) is connected to the other end of the first horizontal portion (193), the other end of the second inclined portion (194) is vertically connected to the second fixing portion (195), the first fixing portion (191) and the second fixing portion (195) extend to the corresponding fixing hole (131), and the first inclined portion (192), the first horizontal portion (193), and the second inclined portion (194) are all in contact with the bottom surface of the fixing cavity (121).

9. The contact structure according to claim 1, characterized in that: The rotating member (12) is provided with an isolating portion (122), and the isolating portion (122) is located between the first moving contact (13) and the second moving contact (14).

10. The contact structure according to claim 1, characterized in that: The first stationary contact (15) is provided with a first matching portion (151), the second stationary contact (16) is provided with a second matching portion (161), the first leg (171) is provided with a third matching portion (1711), and the second leg (172) is provided with a fourth matching portion (1721), and the first matching portion (151), the second matching portion (161), the third matching portion (1711), and the fourth matching portion (1721) are arranged in parallel.

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