Switch unit and switch electric appliance

Abstract

The utility model discloses a switch unit and a switching device, and relates to the technical field of electrical equipment. The switch unit comprises a shell and a static contact, the interior of the shell is divided into a mounting cavity and a wiring channel which are relatively independent and communicated with each other, the static contact is fixedly arranged in the mounting cavity and partially extends into the wiring channel, the wiring channel surrounds the static contact, a first opening is formed in the surface of the shell, and a second opening is formed in the surface of the shell. The first opening is communicated with the tail end, away from the static contact, of the wiring channel, and the wire extends into the wiring channel through the first opening and is fixedly connected with the static contact. According to the switch unit and the switch electric appliance, the creepage distance can be remarkably increased and the safety performance of a product can be improved on the premise of not increasing the size of the product.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a switch unit and a switch electrical appliance. Background Art

[0002] Switchgear plays two roles in power systems: one is control, which involves switching power equipment or lines on and off according to system requirements; the other is protection, which involves quickly removing the faulty part from the system when a fault occurs, ensuring normal operation of the undamaged portion of the system. Disconnectors are a type of switchgear primarily used to isolate power sources, perform switching operations, and connect and disconnect circuits.

[0003] To meet creepage distance requirements, some existing disconnect switches employ staggered arrangements of the static contact screw-locking portions, while others employ the addition of one or more ribs to the screw-locking openings. However, due to the design requirements for miniaturization of disconnect switches, staggered arrangements cannot meet the electrical performance requirements for high voltages, particularly those with rated operating currents of 1500V and above. Adding ribs also increases product size. Utility Model Content

[0004] The purpose of the utility model is to provide a switch unit and a switch electrical appliance, which can significantly increase the creepage distance without increasing the volume of the product and improve the safety performance of the product.

[0005] The embodiment of the present utility model is achieved as follows:

[0006] According to a first aspect of an embodiment of the present invention, a switch unit is provided, comprising a housing and a static contact. The interior of the housing is divided into a relatively independent and interconnected mounting chamber and a wiring channel. The static contact is fixedly disposed in the mounting chamber and partially extends into the wiring channel, which surrounds the static contact. A first opening is provided on a surface of the housing, and the first opening is connected to an end of the wiring channel distal from the static contact. A wire extends into the wiring channel through the first opening and is fixedly connected to the static contact. This switch unit significantly increases creepage distance without increasing product volume, thereby improving product safety.

[0007] As an embodiment, a second opening is further provided on the shell surface, and the second opening is connected to the end of the wiring channel away from the static contact, the second opening is used to avoid the non-metallic part of the wire, and the second opening and the first opening are located on the side walls of the shell surface in different directions.

[0008] As an implementation method, an operating hole is further provided on the surface of the shell, and the plane where the operating hole is located and the plane where the wiring part of the static contact is located are respectively located on opposite sides of the wiring channel, and the fastener extends into the wiring channel through the operating hole, and the fastener is sequentially passed through the metal part of the wire and the wiring part of the static contact to fix the wire to the static contact.

[0009] As an implementable embodiment, an insulating seal is detachably provided on the operating hole, and the insulating seal is used to seal the operating hole.

[0010] As an implementation method, there is an angle between the plane where the wiring portion of the static contact is located and the extension direction of the wiring channel.

[0011] A second aspect of the present invention provides a switch comprising a handle, an operating mechanism, and the aforementioned switch unit. The switch units are multiple, and the switch units and the operating mechanism are stacked in sequence. The housings of two adjacent switch units are fixedly connected. The handle is drivingly connected to the movable contacts of the multiple switch units via the operating mechanism. The handle drives the operating mechanism to synchronously rotate the movable contacts of the multiple switch units. This switch unit significantly increases creepage distance without increasing the product's volume, thereby improving product safety.

[0012] As an implementation method, along the stacking direction, at least two static contacts of the switch units are aligned and arranged at the center of the housing or arranged diagonally.

[0013] As an implementation method, the first openings of two adjacent switch units are located on side walls of the housing surface in the same direction or opposite directions.

[0014] As an implementation method, when the shell surface is further provided with a second opening, the second openings of two adjacent switch units are located on side walls of the shell surface in the same direction.

[0015] As an implementable embodiment, along the extension direction of the wiring channel, the distance between the static contact of any one of the switch units and the first opening is a, the distance between the static contacts of two adjacent switch units is b, and the creepage distance between two adjacent switch units is c, and the following relationship is satisfied: c=4a+b.

[0016] The beneficial effects of the embodiments of the present utility model include:

[0017] The switch unit includes a shell and a static contact. The interior of the shell is divided into a relatively independent and interconnected installation chamber and a wiring channel. The static contact is fixedly arranged in the installation chamber, and the static contact partially extends into the wiring channel. The wiring channel surrounds the outside of the static contact. A first opening is provided on the surface of the shell, and the first opening is connected to the end of the wiring channel away from the static contact. The wire extends into the wiring channel through the first opening, and the wire is fixedly connected to the static contact. The present application designs the layout of the interior of the shell, first dividing the interior of the shell into relatively independent and interconnected installation chambers and wiring channels to ensure that the static contact fixedly installed in the installation chamber can partially extend into the wiring channel for normal wiring. At the same time, the wiring channel is used to surround the outside of the static contact to avoid the static contact being exposed on the surface of the shell. A first opening is provided on the surface of the shell, and the first opening is connected to the end of the wiring channel away from the static contact, so that the wire can be extended into the wiring channel through the first opening, so that the wire and the static contact can be fixedly connected. In this way, the static contact (or the connection point between the wire and the static contact) can be completely hidden deep in the wiring channel (that is, the end of the wiring channel away from the first opening), so that the arc generated between the wire and the static contact needs to move along the wall of the wiring channel to the first opening before it can continue to move along the surface of the shell to other positions with arcs, thereby significantly increasing the creepage distance while avoiding increasing the product volume, thereby improving the safety performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the structure of a switch provided in the first embodiment of the present utility model;

[0020] Figure 2 This is the second structural diagram of the switch electrical appliance provided in the first embodiment of the utility model;

[0021] Figure 3 The third structural diagram of the switch electrical device provided in the first embodiment of the utility model;

[0022] Figure 4 This is the fourth structural diagram of the switch electrical appliance provided in the first embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of a switch provided in the second embodiment of the present invention;

[0024] Figure 6 The second structural diagram of the switch electrical device provided by the second embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of a switch provided in the third embodiment of the present invention;

[0026] Figure 8 This is the second structural diagram of the switch electrical appliance provided in the third embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the structure of a switch provided in the fourth embodiment of the present invention;

[0028] Figure 10 This is the second structural diagram of the switch electrical appliance provided in the fourth embodiment of the present utility model.

[0029] Icon: 100- switch unit; 10- housing; 11- installation chamber; 111- through hole; 12- wiring channel; 121- first opening; 122- operating hole; 123- second opening; 124- insulating seal; 20- static contact; 21- contact part; 22- wiring part; 200- switch electrical appliance; 210- operating mechanism; 220- handle; 300- metal part; 400- fastener. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0035] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections, indirect connections through an intermediate medium, or connections within two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] Please refer to Figures 1 to 10 The present embodiment provides a switch device 200, comprising a handle 220, an operating mechanism 210, and a switch unit 100. There are multiple switch units 100, and the multiple switch units 100 and the operating mechanism 210 are stacked in sequence. The housings 10 of two adjacent switch units 100 are fixedly connected. The handle 220 is drivingly connected to the movable contacts of the multiple switch units 100 through the operating mechanism 210. The handle 220 drives the operating mechanism 210 to cause the movable contacts of the multiple switch units 100 to rotate synchronously. Thus, the operating mechanism 210 can drive the multiple switch units 100 to open and close simultaneously. This switch unit 100 can significantly increase the creepage distance without increasing the product size, thereby improving the product's safety performance.

[0037] Specifically, if Figures 1 to 6As shown, the switch unit 100 includes a shell 10 and a static contact 20. The interior of the shell 10 is divided into a relatively independent and interconnected installation chamber 11 and a wiring channel 12. The static contact 20 is fixedly arranged in the installation chamber 11, and the static contact 20 partially extends into the wiring channel 12. The wiring channel 12 surrounds the static contact 20. A first opening 121 is provided on the surface of the shell 10, and the first opening 121 is connected to the end of the wiring channel 12 away from the static contact 20. The wire extends into the wiring channel 12 through the first opening 121, and the wire is fixedly connected to the static contact 20.

[0038] It should be noted that if Figure 1 and Figure 2 As shown, the switch unit 100 includes a housing 10 and a static contact 20, with the housing 10 serving as the physical basis for installation and support. In addition, the switch unit 100 should also include a moving contact, so that the moving contact and the static contact 20 move away from or toward each other, thereby correspondingly achieving the opening or closing of the switch unit 100. Generally, the housing 10 has an internal accommodating cavity to install components such as the moving contact and the static contact 20 within the housing 10. The moving contact is rotatably mounted within the housing 10, and the static contact 20 is fixedly mounted within the housing 10 so that the moving contact can rotate relative to the static contact 20.

[0039] Unlike the prior art, in the present application, the interior of the housing 10 can be artificially divided into a relatively independent and interconnected installation chamber 11 and a wiring channel 12 by providing physical structures such as baffles and blocks. A first opening 121 is provided on the surface of the housing 10, and the first opening 121 is connected to the end of the wiring channel 12 away from the static contact 20. During the actual assembly process, the moving contact is rotated and set in the installation chamber 11, the static contact 20 is fixed in the installation chamber 11, and the static contact 20 is partially extended into the wiring channel 12, so that the wiring channel 12 surrounds the static contact 20. Since the outside of the housing 10 and the inside of the wiring channel 12 can be connected through the first opening 121, when wiring, the wire can be extended into the wiring channel 12 through the first opening 121, so that the wire and the static contact 20 can be fixedly connected.

[0040] To sum up, the present application designs the layout of the interior of the shell 10, first dividing the interior of the shell 10 into a relatively independent and interconnected installation chamber 11 and a wiring channel 12, so as to ensure that the static contact 20 fixedly installed in the installation chamber 11 can be partially extended into the wiring channel 12 for normal wiring. At the same time, the wiring channel 12 is used to surround the static contact 20 to avoid the static contact 20 being exposed on the surface of the shell 10. A first opening 121 is provided on the surface of the shell 10, and the first opening 121 is connected to the end of the wiring channel 12 away from the static contact, so that the wire can be extended into the wiring channel 12 through the first opening 121, so that the wire and the static contact 20 can be fixedly connected. In this way, the static contact 20 (or the connection point between the wire and the static contact 20) can be completely hidden deep in the wiring channel 12 (that is, the end of the wiring channel 12 away from the first opening 121), so that the arc generated between the wire and the static contact 20 needs to first move along the wall of the wiring channel 12 to the first opening 121 before it can continue to move along the surface of the shell 10 to other positions with arcs, thereby significantly increasing the creepage distance without increasing the product volume, thereby improving the safety performance of the product.

[0041] As an implementable method, Figures 3 to 6 As shown, the surface of the housing 10 is further provided with a second opening 123, and the second opening 123 is connected to the end of the wiring channel 12 away from the static contact 20. The second opening 123 is used to avoid the non-metallic portion of the wire to ensure that the non-metallic portion of the wire has sufficient space to move. The second opening 123 and the first opening 121 are located on the sidewall of the housing 10 in different directions. For example, the first opening 121 is located on the sidewall of the housing 10 along the extension direction (or length direction) of the wiring channel 12 away from the static contact 20, and the second opening 123 is located on the sidewall of the housing 10 along the width direction of the wiring channel 12 away from the static contact 20, so as to match the extension direction of the wire and its own structure.

[0042] In the prior art, the static contact 20 generally includes a contact portion 21, a connecting portion, and a wiring portion 22 connected in sequence, so that the static contact 20 can be bent twice, thereby reducing the arc generated between the wire and the static contact 20, resulting in a relatively complex structure of the static contact 20. In the present application, by designing the layout inside the housing 10, the connection point between the wire and the static contact 20 is completely hidden deep in the wiring channel 12, which has significantly increased the creepage distance. Therefore, as an embodiment, as shown in FIG. Figures 3 to 6As shown, the installation chamber 11 and the wiring channel 12 are connected through the through hole 111. The static contact 20 only includes a contact portion 21 and a wiring portion 22. The contact portion 21 is used to contact the moving contact. The contact portion 21 is fixedly arranged in the installation chamber 11. The wiring portion 22 is used to connect with the wire. The wiring portion 22 extends into the wiring channel 12 through the through hole 111, so that the static contact 20 only needs to be bent once, thereby simplifying the structure of the static contact 20.

[0043] As an implementable method, Figure 5 As shown, the surface of the housing 10 is further provided with an operating hole 122. The plane where the operating hole 122 is located and the plane where the wiring portion 22 of the static contact 20 is located are respectively located on opposite sides of the wiring channel 12. For example, the plane where the operating hole 122 is located and the plane where the wiring portion 22 of the static contact 20 is located are respectively provided on two walls of the wiring channel 12 along its width direction. The fastener 400 can be inserted into the wiring channel 12 through the operating hole 122 with the help of a tool such as a screwdriver. It is only necessary to insert the fastener 400 into the metal portion 300 of the wire and the wiring portion 22 of the static contact 20 in sequence to fix the wire to the static contact 20. Figures 1 to 3 As shown, after the wiring is completed, an insulating seal 124 such as a rubber plug can be detachably arranged in the operating hole 122 so that the insulating seal 124 can seal the operating hole 122, thereby ensuring that the arc generated between the wire and the static contact 20 will not escape through the operating hole 122 to the surface of the shell 10.

[0044] As an implementable method, Figure 4 and Figure 6 As shown, there is an angle α between the plane where the wiring portion 22 is located and the extension direction of the wiring channel 12, and the value range of the angle α is between 0 and 90 degrees. Figure 7 and Figure 8 As shown, the plane where the wiring portion 22 is located is perpendicular to the extension direction of the wiring channel 12 (i.e., the angle α is 90°), so that the wire can press the wiring portion 22 against the physical structure where the through hole 111 is located, thereby ensuring that the wire and the static contact 20 can be stably and reliably fixed. Or, as Figure 9 and Figure 10 As shown, in other embodiments, the angle α between the plane where the wiring portion 22 is located and the extension direction of the wiring channel 12 is an acute angle (for example, 45°), so that the wires can be flexibly arranged and convenient for users to plug in.

[0045] like Figures 1 to 4As shown, in some embodiments, along the stacking direction, the static contacts 20 of two adjacent switch units 100 are aligned and arranged at the center of the housing 10. In other words, along the stacking direction, the static contacts 20 of two adjacent switch units 100 are located on the same straight line, and the straight line passes through the center of the housing 10; or Figure 5 and Figure 6 As shown, in other embodiments, the static contacts 20 of two adjacent switch units 100 are arranged diagonally along the stacking direction. In other words, along the stacking direction, the static contacts 20 of two adjacent switch units 100 are located on the diagonal line of the housing 10. Compared with the creepage distance between the static contacts 20 of two adjacent switch units 100 in an aligned arrangement, the creepage distance between the static contacts 20 of two adjacent switch units 100 in a diagonal arrangement is greater.

[0046] In order to facilitate the explanation of the creepage path and creepage distance between two adjacent switch units 100, as shown in FIG. Figures 3 to 6 As shown, two adjacent switch units 100 are staggered to a certain extent to expose the static contacts 20 of the two adjacent switch units 100. It should be understood that this arrangement does not mean that the two adjacent switch units 100 need to be staggered during the actual assembly process. In fact, Figure 1 、 Figure 2 、 Figures 7 to 10 As shown, in the actual assembly process, when multiple switch units 100 are stacked in sequence, it is necessary to ensure that their orthographic projections on the operating mechanism 210 overlap with each other. Figure 4 and Figure 6 As shown, along the extension direction of the wiring channel 12, the distance between the static contact 20 of any switch unit 100 and the first opening 121 is a, the distance between the static contacts 20 of two adjacent switch units 100 is b, and the creepage distance between two adjacent switch units 100 is c (i.e., the dotted line in the figure), and the following relationship is satisfied: c=4a+b.

[0047] It should be noted that if Figure 4 As shown, when the static contacts 20 of two adjacent switch units 100 are aligned, the distance between the static contacts 20 of the two adjacent switch units 100 is the length of any static contact 20 along the extension direction of the wiring channel 12; Figure 6 As shown, when the static contacts 20 of two adjacent switch units 100 are arranged diagonally, the distance between the static contacts 20 of the two adjacent switch units 100 is the distance between any two static contacts 20 on the side away from each other along the extension direction of the wiring channel 12.

[0048] As an implementable method, Figures 1 to 6As shown, the first openings 121 of two adjacent switch units 100 are located on the side walls of the housing 10 in opposite directions. Figure 3 As shown, taking the illustrated direction as an example, the first opening 121 of the upper switch unit 100 is located on the side wall on the left side of the surface of the shell 10, while the first opening 121 of the lower switch unit 100 is located on the side wall on the right side of the surface of the shell 10.

[0049] As an implementable method, Figure 7 and Figure 8 As shown, the first openings 121 of two adjacent switch units 100 are located on the side walls of the housing 10 in the same direction. Figure 7 and Figure 8 As shown, taking the direction shown in the figure as an example, the first openings 121 of any two adjacent switch units 100 are both located on the side wall on the left side of the surface of the housing 10. At this time, the wires can extend into the wiring channel 12 in the horizontal direction through the first openings 121; Figure 9 and Figure 10 As shown, taking the illustrated direction as an example, the first openings 121 of any two adjacent switch units 100 are located on the downwardly inclined side wall of the housing 10 surface. At this time, the wires can extend obliquely upward into the wiring channel 12 through the first openings 121.

[0050] As an implementable method, Figures 1 to 6 As shown, when the housing 10 is further provided with a second opening 123, the second openings 123 of two adjacent switch units 100 are located on the sidewalls of the wiring channel 12 in the same direction. Figure 3 As shown, taking the illustrated direction as an example, the second opening 123 of the upper switch unit 100 and the second opening 123 of the lower switch unit 100 are both located on the front side wall of the housing 10 surface.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A switch unit, characterized in that: The invention comprises a shell (10) and a static contact (20), wherein the interior of the shell (10) is divided into a relatively independent and mutually connected installation chamber (11) and a wiring channel (12), wherein the static contact (20) is fixedly arranged in the installation chamber (11) and partially extends into the wiring channel (12), and the wiring channel (12) surrounds the static contact (20). A first opening (121) is provided on the surface of the shell (10), and the first opening (121) is connected to the end of the wiring channel (12) away from the static contact (20), and the wire extends into the wiring channel (12) through the first opening (121) and is fixedly connected to the static contact (20).

2. The switch unit according to claim 1, characterized in that The shell (10) surface is further provided with a second opening (123), and the second opening (123) is connected to the end of the wiring channel (12) away from the static contact (20), and the second opening (123) is used to avoid the non-metallic part of the wire, and the second opening (123) and the first opening (121) are located on the side walls of the shell (10) surface in different directions.

3. The switch unit according to claim 1, characterized in that An operating hole (122) is also provided on the surface of the housing (10), and the plane where the operating hole (122) is located and the plane where the wiring portion (22) of the static contact (20) is located are respectively located on opposite sides of the wiring channel (12), and the fastener (400) extends into the wiring channel (12) through the operating hole (122), and the fastener (400) is sequentially inserted into the metal portion of the wire and the wiring portion (22) of the static contact (20) to fix the wire to the static contact (20).

4. The switch unit according to claim 3, characterized in that An insulating seal (124) is detachably provided on the operating hole (122), and the insulating seal (124) is used to seal the operating hole (122).

5. The switch unit according to claim 1, characterized in that There is an angle between the plane where the connection portion (22) of the static contact (20) is located and the extension direction of the connection channel (12).

6. A switch electrical appliance, characterized in that: The invention comprises a handle (220), an operating mechanism (210) and a switch unit (100) according to any one of claims 1 to 5, wherein the number of the switch units (100) is plural, the plural switch units (100) and the operating mechanism (210) are stacked in sequence, the housings (10) of two adjacent switch units (100) are fixedly connected, the handle (220) is connected to the movable contacts of the plural switch units (100) through the operating mechanism (210), and the handle (220) drives the operating mechanism (210) to drive the movable contacts of the plural switch units (100) to rotate synchronously.

7. The switch device according to claim 6, characterized in that: Along the stacking direction, at least two static contacts (20) of the switch units (100) are aligned and arranged at the center of the housing (10) or arranged diagonally.

8. The switch device according to claim 6, characterized in that: The first openings (121) of two adjacent switch units (100) are located on side walls of the housing (10) in the same direction or opposite directions.

9. The switch device according to claim 6, characterized in that: When the surface of the housing (10) is further provided with a second opening (123), the second openings (123) of two adjacent switch units (100) are located on side walls in the same direction of the surface of the housing (10).

10. The switch device according to claim 6, characterized in that: Along the extension direction of the wiring channel (12), the spacing between the static contact (20) of any one of the switch units (100) and the first opening (121) is a, the spacing between the static contacts (20) of two adjacent switch units (100) is b, and the creepage distance between two adjacent switch units (100) is c, and the following relationship is satisfied: c=4a+b.

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