CN220569587U - Isolation switch - Google Patents

Abstract

The utility model provides an isolating switch, comprising: the movable contact is electrically connected with the first wiring terminal, and the fixed contact is electrically connected with the second wiring terminal; the movable contact is of a single-piece structure and is arranged on the handle, the movable contact comprises a movable contact main body and a movable contact part, and the movable contact part is arranged at the outer edge of the handle; the static contact is of a single-piece structure and comprises a static contact part and a fixed part positioned at least one side end of the static contact part, and the static contact part is arranged at an interference position of a rotating track of the moving contact so as to increase the contact friction force between the moving contact and the static contact; when the movable contact rotates under the drive of the handle, the movable contact part moves circularly based on the hinging point of the handle and the shell, so that the movable contact part is contacted with or separated from the static contact part.

Description

Isolation switch

Technical Field

The utility model relates to the field of power equipment, in particular to an isolating switch.

Background

The isolating switch is used for isolating a power supply or connecting or disconnecting a small-current circuit, so that the safety of a circuit is ensured when the related equipment of the circuit is overhauled, maintained or used.

The isolating switch for daily household has relatively simple structure and mainly comprises a shell, a handle, a moving contact, a fixed contact, a wiring terminal and the like. At present, the contact mode of the moving contact and the fixed contact adopts a plurality of clamping type, namely the fixed contact adopts a structure with a clamping opening, the moving contact adopts a contact part corresponding to the clamping opening, the moving contact is driven to move to the clamping opening of the fixed contact through a handle, and the moving contact is tightly clamped by utilizing an elastic structure arranged by the fixed contact, so that the contact between the moving contact and the fixed contact is realized. Of course, the separation of the moving contact and the fixed contact is also driven by the handle.

Because the contact mode of the current moving contact and the fixed contact, such as the fixed contact of the clamping type, at least two copper sheets are required to realize the structure of the clamping opening, and meanwhile, the elastic piece is required to be arranged to keep the clamping force of the clamping opening so as to ensure the reliability of contact, the internal parts and the part structure of the isolating switch are relatively complicated, and the reduction of the product cost is not facilitated.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides an isolating switch.

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

an isolating switch, comprising: the movable contact is electrically connected with the first wiring terminal, and the fixed contact is electrically connected with the second wiring terminal;

the movable contact is of a single-piece structure and is arranged on the handle, the movable contact comprises a movable contact main body and a movable contact part, and the movable contact part is arranged at the outer edge of the handle;

the static contact is of a single-piece structure and comprises a static contact part, and the static contact part is arranged at an interference position of a rotating track of the moving contact so as to increase the contact friction force between the moving contact and the static contact;

when the movable contact rotates under the drive of the handle, the movable contact part moves circularly based on the hinging point of the handle and the shell, so that the movable contact part is contacted with or separated from the static contact part.

Preferably, the movable contact portion is formed by bending a first end of the movable contact, the bent movable contact portion is provided with a first contact surface facing the fixed contact, and the fixed contact portion is provided with a corresponding second contact surface.

Preferably, a limiting groove is formed in the handle, the moving contact is arranged in the limiting groove, a first end of the limiting groove is provided with a first limiting retaining wall which is matched with the bent moving contact part to limit, a second end of the moving contact is provided with a second bent part, a second limiting retaining wall is correspondingly arranged at the second end of the limiting groove, and the moving contact is matched with the first limiting retaining wall and the second limiting retaining wall to limit at two ends through the moving contact parts and the second bent parts at two ends of the moving contact.

Preferably, a pre-deformed elastic member is disposed between the first limiting retaining wall and the moving contact portion, and the moving contact is disposed in the limiting groove by the pre-deformed elastic member.

Preferably, the elastic piece is a U-shaped elastic piece, a positioning convex point is arranged in the direction of the first limiting retaining wall towards the movable contact part, a positioning notch matched with the shape of the positioning convex point is arranged on one side of the elastic piece, and the positioning notch is clamped on the positioning convex point.

Preferably, the handle is adjacent to the first limiting retaining wall, and a third limiting retaining wall is further provided for limiting and driving the movable contact part.

Preferably, the limit groove extends from the outer edge of the handle to the direction of the hinge position of the limit groove and the shell.

Preferably, the second end of the limiting groove is close to the hinge position and deviates from the hinge position.

Preferably, the first limiting retaining wall and the second limiting retaining wall are opposite in arrangement direction, the first limiting retaining wall extends towards the second wiring terminal, and the second limiting retaining wall extends towards the first wiring terminal.

Preferably, the second bending part is located at one end of the second limiting retaining wall and is connected with the first wiring terminal through a flexible wire.

Preferably, a baffle is further provided between the fixed contact and the first connecting terminal, for isolating the fixed contact from the flexible conductor.

Preferably, the first contact surface is an arc surface overlapped with the motion track of the outer edge of the handle, and the second contact surface is adapted to the shape of the first contact surface.

Preferably, the initial contact end of the static contact part is provided with a transitional cambered surface, and the bending direction of the transitional cambered surface is opposite to that of the second contact surface and is smoothly connected with the second contact surface.

Preferably, the inner surface of the housing is provided with a clamping groove, one end of the static contact is further provided with an extension part extending towards the direction of the second wiring terminal, the other end of the static contact is provided with a static contact part, fixing parts on two sides of the static contact part are of structures adapting to the shape of the clamping groove, and the fixing parts are in clamping connection with the clamping groove.

Preferably, the clamping groove is formed by surrounding a boss protruding out of the inner surface of the shell, and reinforcing ribs distributed radially are further arranged on the periphery of the boss.

According to the isolating switch provided by the embodiment of the utility model, the fixed contact is different from the traditional double-sheet structure, the fixed contact is not required to be provided with the clamping opening to clamp the moving contact, the fixed contact is arranged at the interference position of the rotating track of the moving contact, when the moving contact rotates to the position of the fixed contact, the fixed contact interferes with the rotation of the moving contact, the blocking friction force is generated in the rotating direction of the moving contact, the radial component force of the hinging point of the handle is generated through elastic deformation, the friction force in the rotating direction is further increased through the radial force, the stop position of the handle can be further maintained, and meanwhile, the contact reliability of the moving contact and the fixed contact can be ensured.

In addition, the moving contact is directly arranged in the limiting groove of the handle, and the moving contact is matched with the first limiting retaining wall and the second limiting retaining wall through the moving contact parts and the second bending parts at the two ends of the moving contact to form two-end limiting, so that the assembly is simple and reliable.

Further, in this embodiment, the elastic deformation is achieved by an additional elastic member, so that the radial component force is within a reasonable range, and the operation smoothness of the handle is ensured.

Drawings

FIG. 1 is a schematic diagram of the internal structure of an isolating switch of the present utility model;

FIG. 2 is a schematic diagram of the housing structure of the disconnecting switch of the utility model;

FIG. 3 is a schematic view of the handle structure of the disconnecting switch of the utility model;

FIG. 4 is a schematic diagram of the assembly of the handle with the moving contact and the stationary contact of the present utility model;

FIG. 5 is a schematic view of the structure of the moving contact of the present utility model;

FIG. 6 is a schematic view of the structure of the stationary contact of the present utility model;

fig. 7 is a schematic structural view of an elastic member of the present utility model.

Reference numerals in the drawings are as follows:

the disconnecting switch 100, the housing 110, the handle 120, the moving contact 130, the fixed contact 140, the first connecting terminal 150, the second connecting terminal 160, the clamping groove 113, the boss 114, the reinforcing rib 115, the baffle 116, the limiting groove 121, the first limiting retaining wall 1211, the second limiting retaining wall 1212, the third limiting retaining wall 1213, the positioning convex point 1215, the operating point 127, the hinging point 128, the moving contact 131, the first contact surface 1311, the second bending part 132, the moving contact body 133, the fixed contact 141, the second contact surface 1411, the excessive cambered surface 1412, the fixing part 142, the extending part 145, the anti-skid groove 1417, the elastic member 170, the positioning notch 171, and the flexible wire 180.

Detailed Description

Specific embodiments of the disconnector according to the utility model are further described below with reference to the examples given in the accompanying drawings. The isolating switch of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1, the present embodiment provides an isolating switch 100, which is mainly used for isolating a power supply, or connecting or disconnecting a small current circuit, and is convenient for line and equipment overhaul, maintenance, etc.

As shown in connection with fig. 2-6, the disconnector 100 comprises: the movable contact 130 is electrically connected with the first wiring terminal 150, and the fixed contact 140 is electrically connected with the second wiring terminal 160; the movable contact 130 is in a monolithic structure and is arranged on the handle 120, the movable contact 130 comprises a movable contact main body 133 and a movable contact part 131, and the movable contact part 131 is arranged at the outer edge of the handle 120; the fixed contact 140 is of a monolithic structure, the fixed contact 140 includes a fixed contact portion 141 and a fixed portion 142 located on at least one side of the fixed contact portion 141, and the fixed contact portion 141 is disposed at an interference position of the moving contact rotation track so as to increase a contact friction force between the moving contact 130 and the fixed contact 140; when the movable contact 130 is driven to rotate by the handle 120, the movable contact 131 performs a circular motion based on the hinge point 128 of the handle 120 and the housing 110, so as to contact with or separate from the stationary contact 141.

In this embodiment, the fixed contact 140 is disposed at the interference position of the moving contact 130, that is, when the moving contact rotates to the position of the fixed contact, the fixed contact interferes with the rotation of the moving contact, generates a blocking friction force to the rotation direction of the moving contact, generates a radial component force to the hinging point of the handle through elastic deformation, and further increases the friction force in the rotation direction through the radial force, so that the stopping position of the handle can be maintained, and meanwhile, the contact reliability of the moving contact and the fixed contact can be ensured. Unlike conventional static contact arrangement, such as clamping, the position of the moving contact is maintained by elastic clamping force, while the present embodiment is different in that radial component force is generated by interference, so that friction between the two components is increased, and position maintenance is realized.

In this embodiment, as shown in fig. 3 and 4, the handle 120 adopts a fan-shaped structure, and the operating end 127 and the contact end (i.e. the position of the movable contact portion) of the handle are respectively located at two ends of the arc edge of the fan-shaped structure, so that the movable contact 130 and the fixed contact 140 can have the largest opening distance. Of course, the shape of the handle does not have to be a fan-shaped structure, and the setting of the maximum opening distance can be realized only by the movement track of the operation end 127 and the contact end of the moving contact on the fan-shaped movement track.

In some embodiments, to implement the load-carrying operation of the disconnector, an arc extinguishing structure may be further disposed inside the disconnector 100 for extinguishing the arc during the disconnection of the disconnector.

In this embodiment, as shown in fig. 4-6, the movable contact portion 131 is formed by bending a first end of the movable contact 130, the bent movable contact portion 131 has a first contact surface 1311 facing the fixed contact 140, and the fixed contact portion 141 is provided with a corresponding second contact surface 1411. As shown in fig. 1 and 6, the fixed contact 140 is directly mounted on the housing 110 through two ends, in general, the fixed contact 140 is made of a metal material with excellent conductivity, and in this embodiment, the fixed contact 140 is made of copper metal to form a copper sheet structure, and the copper sheet structure itself has a certain elasticity, so that when the movable contact 131 contacts with the fixed contact 141, the contact force can be provided by using the elasticity of the copper sheet structure itself, so that the contact between the movable contact and the fixed contact is kept good.

As a preferred embodiment, the first contact surface 1311 is an arc surface (i.e., the first contact surface 1311 is an arc surface) that coincides with the motion track of the outer edge of the handle 120, and the second contact surface 1411 is adapted to the shape of the first contact surface 1311, i.e., the second contact surface 1411 is also an arc surface, and both the shapes are adapted, so that when the movable contact portion 131 and the static contact portion 141 contact, they can achieve surface contact.

Further, as shown in fig. 6, a plurality of anti-slip grooves 1417 are further formed on the surface of the second contact surface 1411, so that contact reliability between the movable contact portion 131 and the stationary contact portion 141 can be ensured, and the handle 120 can be maintained at a predetermined position after rotation.

Preferably, the initial contact end of the static contact portion 141 is provided with a transitional arc surface 1412, and the curved direction of the transitional arc surface 1412 is opposite to the second contact surface 1411 and is smoothly engaged with the second contact surface 1411. When the movable contact portion 141 moves toward the fixed contact 140, the transition arc surface 1412 may smoothly move the movable contact portion 141 to the fixed contact portion 131 of the fixed contact 140.

In this embodiment, the handle 120 is provided with a limiting groove 121, the moving contact 130 is disposed in the limiting groove 121, a first end of the limiting groove 121 is provided with a first limiting retaining wall 1211 that cooperates with the bent moving contact portion 131 to limit, a second end of the moving contact 130 is provided with a second bending portion 132, a second limiting retaining wall 1212 is correspondingly disposed at the second end of the limiting groove 121, and the moving contact 130 cooperates with the first limiting retaining wall 1211 and the second limiting retaining wall 1212 to form two-end limiting through the moving contact portions 131 and the second bending portions 132 at two ends of the moving contact. The movable contact 130 is kept on the handle 120 through the arrangement of bending at two ends and a limiting retaining wall.

Further, a pre-deformed elastic member 170 is disposed between the first limiting retaining wall 1211 and the movable contact portion 131, the pre-deformed elastic member 170 generates an elastic pushing force on the movable contact portion 131, and under the limiting action of the first limiting retaining wall 1211 and the second limiting retaining wall 1212, both ends of the movable contact 130 are effectively limited, so that the movable contact 130 is pre-tensioned in the limiting groove 121. When the moving contact 130 contacts the fixed contact 140, the elastic member 170 is compressed, the moving contact body 133 slides in the limiting groove 121 toward the second limiting retaining wall 1212, and the first contact surface 1311 and the second contact surface 1411 can be tightly abutted. When the moving contact portion 131 moves toward the fixed contact 140, the transitional cambered surface 1412 can also generate radial force to compress the elastic member 170, so as to avoid the circumferential resistance from blocking the moving contact.

Further, the elastic member 170 is a U-shaped spring, a positioning bump 1215 is disposed in the direction of the first limiting retaining wall 1211 toward the movable contact portion 131, a positioning notch 171 corresponding to the shape of the positioning bump 1215 is disposed on one side of the elastic member 170, and the positioning notch 171 is clamped on the positioning bump 1215. The spring plate of the U-shaped structure is convenient to install between the movable contact part 131 and the second limit retaining wall 1212, and the spring plate is only needed to be clamped in, so that the installation operation is very simple. The positioning protruding points 1215 and the positioning notch 171 are matched with each other, so that the elastic piece 170 can be effectively limited, and the elastic piece 170 is prevented from being ejected out from between the first limiting retaining wall 1211 and the movable contact part 131. As other embodiments, the elastic member 170 may also have a cylindrical spring, a conical spring, or a bar spring.

Further, since the elastic member 170 is disposed between the movable contact portion 131 and the first limiting retaining wall 1211, a portion of the movable contact portion 131 extending out of the limiting groove 121 lacks direct driving force, and in order to ensure effective movement of the movable contact portion 131, a third limiting retaining wall 1213 is further disposed at a position of the handle 120 adjacent to the first limiting retaining wall 1211 for limiting and driving the movable contact portion 131, so as to prevent circumferential deformation of the movable contact portion 131 when the handle 120 rotates. As other embodiments, the movable contact 130 may be fixed to the handle 120 by other locking structures, or may be fixed by screws or the like.

In this embodiment, the limiting groove 121 extends from the outer edge of the handle 120 toward the hinge position of the handle and the housing 110. That is, the tail end (second end) of the moving contact 130 extends toward the hinge point 128, so that the moving distance of the tail end of the moving contact 130 is reduced as much as possible when the handle 120 rotates, and thus the pulling of the flexible wire 180 is minimized, and the connection reliability of the moving contact 130 and the flexible wire 180 is ensured. In this embodiment, the connection manner of the fixed contact 140 and the second connection terminal 160 may also be adapted to the flexible wire connection, so that the use of copper may be further reduced, and of course, as shown in fig. 6, in this embodiment, the fixed contact is directly connected to the second connection terminal 160 through the extension portion 145, and the extension portion 145 and the fixed contact portion 141 are integrally formed, so that the integration of the parts may be improved and the installation procedure may be reduced.

As a further improvement, the second end of the limiting groove 121 is located near the hinge position but offset from the hinge point 128. The position deviating from the hinge point 128 but approaching the hinge point 128 may firstly reduce the moving distance of the second end of the moving contact 130, and secondly may have a larger space to provide the second bending portion.

Of course, as an alternative embodiment, the second end of the moving contact 130 may be configured to be adapted to the hinge point 128, so that it may be rotatably disposed on the hinge point 128, so that the moving distance of the second end of the moving contact 130 may be minimized.

In this embodiment, the setting direction of the first limit retaining wall 1211 is opposite to that of the second limit retaining wall 1212, the first limit retaining wall 1211 extends toward the second terminal 160, and the second limit retaining wall 1212 extends toward the first terminal 150, that is, the second end of the limit slot 121 is offset toward the first terminal 150 with respect to the hinge point 128, so as to reduce the setting length of the flexible wire 180 and further reduce the pulling distance of the flexible wire 180.

In this embodiment, the second bending portion 132 is located at one end of the second limit retaining wall 1212 and is connected to the first connection terminal 150 through a flexible wire 180. Since the second bent portion 132 is the tail end of the movable contact 130, the shortest distance of the flexible wires 180 can be achieved by using it as a connection portion of the flexible wires 180.

In this embodiment, as shown in fig. 1 and 2, between the fixed contact 140 and the first connection terminal 150, the housing 110 is further provided with a baffle 116 for isolating the fixed contact 140 from the flexible wire 180. This may be used to prevent the pigtails 180 from contacting the stationary contacts 140 to enhance the dielectric properties of the product.

In this embodiment, as shown in fig. 2 and fig. 6, the inner surface of the housing 110 is provided with a clamping groove 113, one end of the stationary contact 140 is an extension portion 145, the other end is a stationary contact portion 141, the extension portion 145 and the stationary contact portion 141 are integrally formed, the extension portion 145 is connected to the second connection terminal 160 and fixed with the second connection terminal 160, two sides of the stationary contact portion 141 at the other end are provided with fixing portions 142 which are clamped with the clamping groove 113, and the shape of the fixing portions 142 is adapted to the shape of the clamping groove 113.

Preferably, the clamping groove 113 is surrounded by a boss 114 protruding from the inner surface of the housing 110, and radially distributed reinforcing ribs 115 are further disposed on the outer periphery of the boss 114. By providing the boss 114 and the reinforcing rib 115, a sufficient mounting strength of the stationary contact 140 can be ensured.

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 (15)

1. An isolating switch, comprising: the portable electronic device comprises a shell (110), a handle (120), a moving contact (130), a fixed contact (140), a first wiring terminal (150) and a second wiring terminal (160), wherein the handle (120) is hinged to the shell (110), the moving contact (130) is electrically connected with the first wiring terminal (150), and the fixed contact (140) is electrically connected with the second wiring terminal (160); the method is characterized in that:

the movable contact (130) is of a single-piece structure and is arranged on the handle (120), the movable contact (130) comprises a movable contact main body (133) and a movable contact part (131), and the movable contact part (131) is arranged at the outer edge of the handle (120);

the static contact (140) is of a single-piece structure, the static contact (140) comprises a static contact part (141), and the static contact part (141) is arranged at an interference position of the rotating track of the moving contact;

when the movable contact (130) rotates under the drive of the handle (120), the movable contact part (131) performs circular motion based on the hinging point of the handle (120) and the shell (110) so as to realize contact or separation with the static contact part (141).

2. The isolating switch of claim 1, wherein: the movable contact part (131) is formed by bending a first end of the movable contact (130), the bent movable contact part (131) is provided with a first contact surface (1311) facing the fixed contact (140), and the fixed contact part (141) is provided with a corresponding second contact surface (1411).

3. The disconnector according to claim 2, characterized in that: be provided with spacing groove (121) on handle (120), moving contact (130) set up in spacing groove (121), the first end of spacing groove (121) be provided with the cooperation of the moving contact portion (131) of bending carries out spacing first spacing barricade (1211), the second end of moving contact (130) is provided with second bending portion (132), spacing groove (121) second end corresponds and is provided with second spacing barricade (1212), moving contact (130) through moving contact portion (131), second bending portion (132) in its both ends with first spacing barricade (1211), the cooperation of second spacing barricade (1212) form both ends spacing.

4. A disconnector according to claim 3, in which: a pre-deformed elastic piece (170) is arranged between the first limiting retaining wall (1211) and the movable contact part (131), and the pre-deformed elastic piece (170) is used for arranging the movable contact (130) in the limiting groove (121).

5. The isolating switch as in claim 4, wherein: the elastic piece (170) is a U-shaped elastic piece, a positioning convex point (1215) is arranged in the direction of the first limiting retaining wall (1211) towards the movable contact portion (131), one side of the elastic piece (170) is provided with a positioning notch (171) which is matched with the positioning convex point (1215) in shape, and the positioning notch (171) is clamped on the positioning convex point (1215).

6. The isolating switch as in claim 4, wherein: the handle (120) is adjacent to the first limiting retaining wall (1211), and a third limiting retaining wall (1213) is further arranged to limit and drive the movable contact part (131).

7. A disconnector according to claim 3, in which: the limiting groove (121) extends from the outer edge of the handle (120) to the direction of the hinge position of the handle and the shell (110).

8. The isolating switch of claim 7, wherein: the second end of the limiting groove (121) is close to the hinge position and deviates from the hinge position.

9. The isolating switch of claim 8, wherein: the first limit retaining wall (1211) and the second limit retaining wall (1212) are opposite in arrangement direction, the first limit retaining wall (1211) extends towards the second wiring terminal (160), and the second limit retaining wall (1212) extends towards the first wiring terminal (150).

10. The isolating switch of claim 9, wherein: one end of the second bending part (132) positioned at the second limit retaining wall (1212) is connected with the first wiring terminal (150) through a flexible wire (180).

11. The isolating switch of claim 10, wherein: between the fixed contact (140) and the first connecting terminal (150), the housing (110) is further provided with a baffle (116) for isolating the fixed contact (140) from the flexible conductor (180).

12. The disconnector according to claim 2, characterized in that: the first contact surface (1311) is an arc surface which coincides with the movement track of the outer edge of the handle (120), and the second contact surface (1411) is adapted to the shape of the first contact surface (1311).

13. The isolating switch of claim 12, wherein: the initial contact end of the static contact part (141) is provided with a transitional cambered surface (1412), and the bending direction of the transitional cambered surface (1412) is opposite to that of the second contact surface (1411) and is smoothly connected with the second contact surface (1411).

14. The isolating switch of claim 1, wherein: the inner surface of casing (110) sets up draw-in groove (113), the one end of static contact (140) still be provided with to extension (145) that second binding post (160) direction was extended, the other end of static contact (140) is static contact portion (141), fixed part (142) of static contact portion (141) both sides be with draw-in groove (113) shape adaptation's structure, fixed part (142) with draw-in groove (113) joint.

15. The disconnector according to claim 14, in which: the clamping groove (113) is surrounded by a boss (114) protruding out of the inner surface of the shell (110), and reinforcing ribs (115) distributed radially are further arranged on the periphery of the boss (114).