Contact assembly and isolating switch

Abstract

The utility model relates to the technical field of switches, and discloses a contact assembly and an isolating switch. The contact assembly comprises: a static contact; the moving contact has a first state in which the moving contact is conducted with the static contact and a second state in which the moving contact is disconnected with the static contact; and the moving contact frame is fixedly connected with the moving contact, the moving contact frame is provided with an accommodating groove for the static contact to pass through, one end of the accommodating groove is provided with a first limiting surface, and the moving contact is suitable for being converted from the first state to the second state when the static contact is in contact with the first limiting surface. The first limiting surface is arranged at one end of the accommodating groove, so that the situation that the two adjacent movable contact frames are disjointed and the stability of the isolating switch in use is influenced due to excessive rotation of the movable contact frames due to inertia in the rotating process can be prevented; the position of the first limiting surface is set to be that the moving contact is just converted from the first state to the second state, so that the best electrical isolation effect of the isolation switch can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a contact assembly and an isolating switch. Background Art

[0002] The isolating switch consists of an operating part and multiple contact assemblies. Each contact assembly includes a shell and a moving contact frame. The moving contact frame can be rotatably arranged in the shell. A linkage piece is provided on the top of each moving contact frame, and a groove is provided on the bottom. The two adjacent moving contact frames can achieve synchronous rotation through the linkage piece and the groove. A static contact is fixed on the shell of the contact assembly, and a moving contact is fixed in the moving contact frame. The operating part drives the moving contact frame to rotate, thereby driving the moving contact and the static contact to be turned on and off.

[0003] The isolating switch is used to isolate electricity when the circuit is in the disconnected state. In order to ensure the electrical isolation effect of the isolating switch, the opening distance (i.e. the distance between the moving contact and the static contact) needs to be large enough when the circuit is disconnected. Since the moving contact and the static contact are symmetrically provided with two, the maximum opening distance is when the moving contact frame rotates 90° from the conducting state. At this time, the electrical isolation effect is also the best. After the isolating switch is used for a long time, the moving contact frame will rotate excessively due to inertia during the rotation process, causing the two adjacent moving contact frames to become disjointed, that is, the moving contact frame continues to move after reaching the specified position, resulting in misalignment with the static contact; secondly, even if there is no disjoint between adjacent moving contact frames, inertia will cause a twisting force to be generated at the connection between the linkage and the groove of the adjacent moving contact frames, accelerating the disjointness, thereby affecting the stability of the isolating switch during use.

[0004] The prior art discloses an isolating switch for preventing the moving contact from being misaligned, such as Figure 1-Figure 3 As shown, the disconnector includes several contact assemblies, each of which includes a module housing 01, a movable contact rotating frame 02 is rotatably arranged in the module housing 01, a limit block 021 is fixedly arranged on the movable contact rotating frame 02, a linkage column 022 and a groove 023 are correspondingly arranged on the upper and lower sides of the movable contact rotating frame 02, and a first blocking wall 011 and a second blocking wall 012 are correspondingly arranged on the module housing 01 in correspondence with the limit block 021. When the limit block 021 abuts against the first blocking wall 011, the static contact 03 and the movable contact 04 are in the conducting position; when the limit block 021 abuts against the second blocking wall 012, the static contact 03 and the movable contact 04 are in the disconnecting position. When the movable contact 04 changes from the conducting position to the disconnecting position, the movable contact rotating frame 02 rotates 90°.

[0005] By setting the limit block 021 and the second blocking wall 012, when the moving contact rotating frame 02 rotates to the disconnecting position, the second blocking wall 012 limits the moving contact rotating frame 02 from continuing to rotate, thereby preventing the linkage column 022 from being disconnected from the groove 023 located above, causing the static contact 03 and the moving contact 04 to be misaligned; secondly, the torsional force at the connection between the linkage column 022 and the groove 023 is transferred to between the second blocking wall 012 and the limit block 021, which can improve the stability of the disconnector during operation.

[0006] However, since the module housing 01 and the moving contact rotating frame 02 are both made of plastic, the limit block 021 and the second blocking wall 012 are easily deformed after multiple collisions, and when the moving contact rotating frame 02 rotates excessively, the limit block 021 may break, thereby affecting the stability of the disconnector during operation. Utility Model Content

[0007] In view of this, the utility model provides a contact assembly and an isolating switch to solve the problem that when the movable contact frame of the isolating switch rotates excessively, the isolating effect of the isolating switch is poor and the working stability is reduced.

[0008] In a first aspect, the utility model provides a contact assembly, comprising:

[0009] Stationary contact;

[0010] A moving contact, wherein the moving contact has a first state of being connected to the stationary contact and a second state of being disconnected;

[0011] A moving contact frame, wherein the moving contact frame is fixedly connected to the moving contact, and the moving contact frame is provided with a receiving groove for the static contact to pass through, and one end of the receiving groove is provided with a first limiting surface, which is suitable for the moving contact to change from the first state to the second state when the static contact contacts the first limiting surface.

[0012] Beneficial effects: By setting a first limiting surface at one end of the accommodating groove, when the static contact contacts the first limiting surface, the moving contact frame can no longer rotate, which can prevent the moving contact frame from rotating excessively due to inertia during rotation, resulting in disconnection between two adjacent moving contact frames, or excessive twisting force between two adjacent moving contact frames, causing damage to the linkage structure at the connection between the two moving contact frames, thereby affecting the stability of the isolating switch during use; since the static contact is generally made of metal, the static contact is contacted with the first limiting surface for limiting, and the structure is not easy to deform and break, and is safer and more stable when used; by setting the position of the first limiting surface to the point where the moving contact just changes from the first state to the second state, the distance between the static contact and the moving contact can be maximized when the circuit is disconnected, thereby ensuring the best electrical isolation effect of the isolating switch.

[0013] In an optional implementation, the stationary contact is provided with a second limit surface coordinated with the first limit surface.

[0014] Beneficial effect: By providing a second limiting surface on the static contact, the contact area between the static contact and the first limiting surface can be increased, the contact is more stable, and the dynamic contact frame is not easy to rotate excessively; and it will not cause damage to the static contact and the structure of the first limiting surface, thereby improving the service life.

[0015] In an optional implementation, the first limiting surface is arranged in parallel with the second limiting surface.

[0016] In an optional embodiment, two static contacts are provided, two corresponding accommodating grooves are provided, and the first limiting surface is provided at the end of at least one of the accommodating grooves.

[0017] In an optional embodiment, the ends of the two accommodating grooves are both provided with the first limiting surface.

[0018] Beneficial effect: By providing the first limiting surfaces at the ends of the two accommodating grooves, the limiting effect is better and the rotation of the movable contact frame is more stable.

[0019] In an optional embodiment, at least one end of the moving contact is provided with a contact end, and the contact end is suitable for conducting and disconnecting with the static contact.

[0020] In an optional implementation, inclined surfaces are respectively provided on both sides of the contact end.

[0021] Beneficial effects: By setting the inclined surfaces and setting them on both sides of the static contact, it is possible to prevent the burrs on the edges of the static contact from coming into contact with the moving contact and causing wear to the moving contact; secondly, by setting the inclined surfaces on both sides of the contact end, it is possible to facilitate the static contact to extend into the opening between the moving contacts, prevent jamming, and make the rotation of the moving contact frame more flexible.

[0022] In an optional embodiment, the angle between the inclined plane and the horizontal plane is 15°-30°.

[0023] Beneficial effect: By setting the included angle between the inclined plane and the horizontal plane to 15°-30°, the movement of the moving contact can be guided, making it easier for the static contact to extend into the opening between the moving contacts.

[0024] In an optional embodiment, the contact assembly includes:

[0025] The movable contact frame is rotatably arranged in the shell, and the static contact is fixedly arranged on the shell.

[0026] Beneficial effect: By rotatably arranging the moving contact frame in the housing, the moving contact can be driven to rotate, thereby realizing the conduction and disconnection of the moving contact and the static contact.

[0027] In a second aspect, the utility model further provides an isolating switch, comprising:

[0028] At least two groups of the above-mentioned contact assemblies, at least two groups of the contact assemblies are fixedly connected;

[0029] The operating part is connected to the contact assembly and is suitable for driving the movable contact frame to rotate under the action of external force.

[0030] Beneficial effect: Since the isolating switch includes a contact assembly, it has the same effect as the contact assembly and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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.

[0032] Figure 1 It is a structural schematic diagram of a contact assembly in the prior art;

[0033] Figure 2 It is a structural schematic diagram of a movable contact rotating frame in the prior art;

[0034] Figure 3 It is a structural schematic diagram of a module housing in the prior art;

[0035] Figure 4 A schematic diagram of a partial structure of a contact assembly according to an embodiment of the utility model;

[0036] Figure 5 This is a structural schematic diagram of a movable contact frame according to an embodiment of the utility model;

[0037] Figure 6 This is a schematic structural diagram of a static contact in an embodiment of the utility model;

[0038] Figure 7 This is a schematic structural diagram of a contact assembly according to an embodiment of the utility model;

[0039] Figure 8 The present invention is a schematic structural diagram of an isolating switch according to an embodiment of the present invention.

[0040] Description of reference numerals:

[0041] 01, module housing; 011, first blocking wall; 012, second blocking wall; 02, moving contact rotating frame; 021, limit block; 022, linkage column; 023, groove; 03, static contact; 04, moving contact;

[0042] 1. static contact; 11. second limiting surface; 2. moving contact; 21. contact end; 22. inclined surface; 3. moving contact frame; 31. accommodating groove; 32. first limiting surface; 4. housing; 5. operating part. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0044] Combine the following Figures 4 to 8 , describing an embodiment of the utility model.

[0045] According to an embodiment of the utility model, on the one hand, a contact assembly is provided, including: a stationary contact 1; a moving contact 2, the moving contact 2 having a first state of being connected to the stationary contact 1 and a second state of being disconnected; a moving contact frame 3, the moving contact frame 3 being fixedly connected to the moving contact 2, the moving contact frame 3 being provided with a receiving groove 31 for the stationary contact 1 to pass through, a first limiting surface 32 being provided at one end of the receiving groove 31, suitable for the moving contact 2 to change from the first state to the second state when the stationary contact 1 contacts the first limiting surface 32.

[0046] By setting a first limiting surface 32 at one end of the accommodating groove 31, when the static contact 1 contacts the first limiting surface 32, the moving contact frame 3 can no longer rotate, which can prevent the moving contact frame 3 from rotating excessively due to inertia during the rotation process, resulting in disconnection between two adjacent moving contact frames 3, or excessive twisting force between two adjacent moving contact frames 3, causing damage to the linkage structure at the connection between the two moving contact frames 3, thereby affecting the stability of the isolating switch during use; since the static contact 1 is generally made of metal, the static contact 1 is contacted with the first limiting surface 32 for limiting, and the structure is not easy to deform and break, and is safer and more stable when used; by setting the position of the first limiting surface 32 to the moving contact 2 just changing from the first state to the second state, the distance between the static contact 1 and the moving contact 2 can be maximized when the circuit is disconnected, thereby ensuring the best electrical isolation effect of the isolating switch.

[0047] like Figure 4-Figure 6As shown, the static contact 1 is provided with a second limiting surface 11 which is arranged in cooperation with the first limiting surface 32. The first limiting surface 32 is arranged in parallel with the second limiting surface 11. By providing the second limiting surface 11 on the static contact 1, the contact area between the static contact 1 and the first limiting surface 32 can be increased, the contact is more stable, and the movable contact frame 3 is not easy to rotate excessively; and the static contact 1 and the structure of the first limiting surface 32 will not be damaged, thereby improving the service life. As a convertible embodiment, it is also possible that the shape of the first limiting surface 32 is adapted to the side shape of the static contact 1, and thus the second limiting surface 11 does not need to be provided on the static contact 1, or the second limiting surface 11 is not provided on the static contact 1, but the first limiting surface 32 contacts with part of the side structure of the static contact 1.

[0048] In this embodiment, two stationary contacts 1 are provided, and two corresponding accommodating grooves 31 are provided, and the ends of the two accommodating grooves 31 are provided with first limiting surfaces 32. By providing the first limiting surfaces 32 at the ends of the two accommodating grooves 31, the limiting effect is better, and the rotation of the movable contact frame 3 is more stable. As a convertible implementation, the first limiting surface 32 can also be provided at the end of only one of the accommodating grooves 31.

[0049] In this embodiment, both ends of the moving contact 2 are provided with contact terminals 21, and the contact terminals 21 are suitable for conducting and disconnecting with the stationary contact 1. The two contact terminals 21 are provided in a one-to-one correspondence with the two stationary contacts 1. As a convertible implementation, the contact terminal 21 may also be provided at only one end of the moving contact 2.

[0050] like Figure 4-Figure 5 As shown, the two sides of the contact end 21 are provided with inclined surfaces 22. By providing the inclined surfaces 22 and correspondingly providing them on both sides of the stationary contact 1, it is possible to prevent the burrs on the edges of the stationary contact 1 from contacting the moving contact 2 and causing wear to the moving contact 2; secondly, by providing the inclined surfaces 22 on both sides of the contact end 21, it is possible to facilitate the stationary contact 1 to extend into the opening between the moving contacts 2, prevent jamming, and make the rotation of the moving contact frame 3 more flexible. As a convertible embodiment, the inclined surface 22 can also be provided only on one side of the contact end 21.

[0051] The angle between the inclined plane 22 and the horizontal plane is 15°-30°. By setting the angle between the inclined plane 22 and the horizontal plane to be 15°-30°, the movement of the moving contact 2 can be guided, so that the static contact 1 can be inserted into the opening between the moving contacts 2. As a convertible embodiment, the angle between the inclined plane 22 and the horizontal plane can also be 10° or 35°. The angle between the inclined plane 22 and the horizontal plane is determined according to actual conditions, and no excessive restrictions are made here.

[0052] like Figure 7As shown, the contact assembly in this embodiment includes: a housing 4, a movable contact frame 3 rotatably disposed in the housing 4, and a stationary contact 1 fixedly disposed on the housing 4. By rotatably disposing the movable contact frame 3 in the housing 4, the movable contact 2 can be driven to rotate, thereby realizing the conduction and disconnection of the movable contact 2 and the stationary contact 1.

[0053] According to an embodiment of the utility model, on the other hand, an isolating switch is provided, comprising: at least two groups of the above-mentioned contact assemblies, at least two groups of contact assemblies are fixedly connected; an operating part 5, connected to the contact assembly, suitable for driving the movable contact frame 3 to rotate under the action of external force.

[0054] like Figure 8 As shown, the isolating switch includes five groups of contact assemblies. The upper and lower sides of each moving contact frame 3 are respectively provided with linkage columns and grooves. Adjacent contact assemblies are fixedly connected by inserting the linkage columns on the moving contact frame 3 of the lower layer into the grooves of the moving contact frame 3 of the upper layer.

[0055] In this embodiment, the operating part 5 is fixedly connected to the movable contact frame 3, and the operating part 5 drives the movable contact frame 3 to rotate, thereby driving the movable contact 2 to be connected and disconnected with the static contact 1. Specifically, the operating part 5 is a rotating handle, and the operator can manually rotate the operating part 5 to realize the rotation of the movable contact frame 3.

[0056] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A contact assembly, characterized in that: include: Stationary contact (1); A moving contact (2), the moving contact (2) having a first state of being connected to the stationary contact (1) and a second state of being disconnected; A moving contact frame (3), the moving contact frame (3) being fixedly connected to the moving contact (2), the moving contact frame (3) being provided with a receiving groove (31) for the stationary contact (1) to pass through, one end of the receiving groove (31) being provided with a first limiting surface (32), adapted for the moving contact (2) to change from the first state to the second state when the stationary contact (1) contacts the first limiting surface (32).

2. The contact assembly according to claim 1, characterized in that: The stationary contact (1) is provided with a second limiting surface (11) which is arranged in coordination with the first limiting surface (32).

3. The contact assembly according to claim 2, characterized in that: The first limiting surface (32) is arranged in parallel with the second limiting surface (11).

4. The contact assembly according to claim 1, characterized in that: Two static contacts (1) are provided, and two accommodating grooves (31) are provided correspondingly, and the end of at least one of the accommodating grooves (31) is provided with the first limiting surface (32).

5. The contact assembly according to claim 4, characterized in that: The ends of the two containing grooves (31) are both provided with the first limiting surface (32).

6. The contact assembly according to any one of claims 1 to 5, characterized in that: At least one end of the moving contact (2) is provided with a contact end (21), and the contact end (21) is suitable for conducting and disconnecting with the stationary contact (1).

7. The contact assembly according to claim 6, characterized in that: Inclined surfaces (22) are respectively provided on both sides of the contact end (21).

8. The contact assembly according to claim 7, characterized in that: The angle between the inclined plane (22) and the horizontal plane is 15°-30°.

9. The contact assembly according to any one of claims 1 to 5, characterized in that: The contact assembly comprises: The housing (4) is provided with a movable contact frame (3) which can be rotatably arranged in the housing (4), and the stationary contact (1) is fixedly arranged on the housing (4).

10. An isolating switch, characterized in that: include: At least two groups of contact assemblies according to any one of claims 1 to 9, wherein at least two groups of contact assemblies are fixedly connected; The operating part (5) is connected to the contact assembly and is suitable for driving the movable contact frame (3) to rotate under the action of an external force.

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