Linear switchgear

Abstract

The utility model relates to linear switch equipment. The linear switch equipment comprises a first contact assembly, a second contact assembly and a guide assembly, the second contact assembly comprises a moving contact and a moving side conductor, and the moving contact can move relative to the moving side conductor; the guide assembly comprises a first guide rail and a second guide rail, the first guide rail is fixed on the moving side conductor, an installation gap is formed between the first guide rail and the moving side conductor, the second guide rail is arranged in the installation gap and connected with the moving contact, and the first guide rail is slidably connected with the second guide rail. The moving path of the moving contact is limited through the first guide rail and the second guide rail, and the moving contact can be guided to move, so that the moving contact stably moves in the switching-on process and is accurately inserted into the first contact assembly; the positions of the first guide rail, the second guide rail and the moving contact can prevent the second guide rail and the moving contact from shifting in the radial direction, and the stability of the moving contact in the whole-stroke movement process can be ensured, so that the moving contact is reliably contacted with the first contact finger.

Description

Technical Field

[0001] The present application relates to the technical field of high-voltage switches, and in particular to a linear switch device. Background Art

[0002] With the rapid development of economy, the industrial electricity load has increased dramatically, and large-capacity high-voltage switches have gradually become the main force of power transmission and distribution equipment. High-voltage switches refer to indoor and outdoor AC switchgear operating in power systems with voltages of 3kV and above and frequencies of 50Hz and below. High-voltage switches play a very important role in power systems. They are mainly used for the control and protection of power systems. High-voltage switches can put part of the power equipment or lines into or out of operation according to the needs of power grid operation, and can also quickly cut off the faulty part from the power grid when a power equipment or line fails, thereby ensuring the normal operation of the fault-free part of the power grid and the safety of equipment and operation and maintenance personnel.

[0003] The size and stroke of large-capacity high-voltage switches are generally large, which requires that the moving contact must have sufficient stability during the full stroke movement to ensure reliable contact between the moving contact and the static side conductor contact, thereby ensuring the safe operation of large-capacity high-voltage switchgear.

[0004] Therefore, how to ensure the stability of the moving contact during the full stroke movement is one of the important issues that technicians need to solve. Utility Model Content

[0005] Based on this, it is necessary to provide a linear switch device to solve the problem of how to ensure the stability of the moving contact during the full stroke movement.

[0006] An embodiment of the present application provides a linear switch device, which includes a first contact assembly, a second contact assembly and a guide assembly; the second contact assembly includes a moving contact and a moving-side conductor sleeved on the periphery of the moving contact, the moving contact is movable relative to the moving-side conductor, the moving contact includes an open state and a closed state, in the open state, the moving contact is separated from the first contact assembly; in the closed state, the moving contact is inserted into the first contact assembly; the guide assembly includes a first guide rail and a second guide rail, the first guide rail is fixed to the moving-side conductor, and an installation gap is formed between the first guide rail and the moving-side conductor, the second guide rail is arranged in the installation gap and is connected to the moving contact, the first guide rail is slidably connected to the second guide rail, and the guide assembly is used to limit the moving path of the moving contact so that the moving contact can switch between the open state and the closed state along the axial direction.

[0007] In one embodiment, a mounting hole is provided on the first guide rail, and the mounting hole is used to cooperate with a fastener to fix the first guide rail to the moving side conductor. The mounting holes include two mounting holes, and the distance between the two mounting holes is not less than half the length of the first guide rail.

[0008] In one of the embodiments, the moving contact includes a first mating end and a second mating end that are relatively arranged. In the open state, the moving contact is gap-fitted with the moving side conductor; in the closed state, the first mating end is inserted into the first contact assembly, and the second mating end is connected to the moving side conductor.

[0009] In one embodiment, the guide assembly further includes a rolling member, which is disposed between the first guide rail and the second guide rail and is rotationally connected to the second guide rail. When the second guide rail slides relative to the first guide rail, the rolling member can move on the first guide rail.

[0010] In one embodiment, the guide assembly also includes a support member, which is fixedly connected to the second guide rail. The support member includes a supporting portion and a limiting portion that are connected to each other. The rolling member is sleeved on the supporting portion. The limiting portion protrudes out of the supporting portion and abuts against the end face of the rolling member. The limiting portion is used to limit the rolling member.

[0011] In one of the embodiments, the guide assembly further includes a limiting member, which is disposed between the supporting member and the first guide rail, and is used to limit the supporting member.

[0012] In one embodiment, the guide assembly further includes a barrier member, which is disposed between the second guide rail and the rolling member, and is used to block the friction force of the rolling member on the second guide rail.

[0013] In one embodiment, the first contact assembly further includes a stationary conductor, and the guide assembly further includes a guide member connected to the stationary conductor, and the guide member is used to guide the moving contact to be inserted into the stationary conductor.

[0014] In one embodiment, the linear switch device further includes a driving member connected to the moving contact, and the driving member is used to drive the moving contact to move toward or away from the first contact assembly.

[0015] In one of the embodiments, the linear switch device further includes a transmission member, the driving member is connected to the transmission member, the transmission member is radially arranged inside the moving contact, and the transmission member is used to transmit the driving force of the driving member to the moving contact.

[0016] In the above-mentioned linear switch device, the moving path of the moving contact is limited by the first guide rail and the second guide rail, which can play a role in guiding the movement of the moving contact, so that the moving contact can move smoothly and accurately and centrally inserted into the first contact assembly during the closing process. In addition, the position setting of the first guide rail, the second guide rail and the moving contact can avoid radial displacement of the second guide rail and the moving contact in the moving side conductor, which can ensure the stability of the moving contact during the full stroke movement, so that the moving contact can reliably contact the first contact finger, effectively improving the operational reliability and safety of the switch device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of a linear switch device in an open state according to an embodiment of the present application.

[0018] FIG. 2 is a schematic diagram of a linear switch device in a closed state in an embodiment of the present application.

[0019] FIG. 3 is a side view of a second contact assembly and a guide assembly in an embodiment of the present application.

[0020] FIG. 4 is a schematic diagram of a guide assembly along the axial direction in an embodiment of the present application.

[0021] FIG. 5 is a schematic diagram of the structure of a guide assembly in an embodiment of the present application.

[0022] Among them, the reference numerals are: first contact assembly 1, static side conductor 11, first contact finger 12, second contact assembly 2, moving side conductor 21, moving contact 22, second contact finger 23, first mating end 24, second mating end 25, connecting body 26, reinforcing body 27, guide assembly 3, first guide rail 31, second guide rail 32, mounting hole 33, rolling member 34, supporting member 35, limiting member 36, spacer member 37, guide member 38, transmission member 41, offset circular through hole 42. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0024] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 a limitation on the present application.

[0025] An embodiment of the present application provides a linear switch device, which is used for controlling and protecting a power system. Preferably, the linear switch device of the present application is a large-capacity switch device.

[0026] As shown in Figures 1 and 2, the linear switch device includes a first contact assembly 1, a second contact assembly 2 and a guide assembly 3. The first contact assembly 1 serves as a static contact end, and the second contact assembly 2 serves as a movable contact end. The second contact assembly 2 can move toward or away from the first contact assembly 1 under the action of an external driving force; the linear switch device includes an opening state and a closing state. In the opening state (as shown in Figure 1), the second contact assembly 2 moves to separate from the first contact assembly 1, thereby cutting off the current. In the closing state (as shown in Figure 2), the second contact assembly 2 moves to connect with the first contact assembly 1, and the current flows through the first contact assembly 1 and the second contact assembly 2, thereby conducting the circuit; the guide assembly 3 is used to limit the moving path of the movable contact 22 in the second contact assembly 2, so that the movable contact 22 can switch between the opening state and the closing state along the axial direction.

[0027] The first contact assembly 1 includes a static conductor 11, which is a ring-shaped hollow structure. The static conductor 11 is provided with a circular inner cavity. The circular inner cavity of the static conductor 11 is connected to the external space to form an airflow channel, which is conducive to the heat dissipation of the conductive circuit. The static conductor 11 is provided with a first contact finger 12 at the end close to the second contact assembly 2. The first contact finger 12 is used for conducting electricity. The second contact assembly 2 includes a moving conductor 21 and a moving contact 22. The moving conductor 21 is sleeved on the periphery of the moving contact 22. The moving contact 22 is movable relative to the moving conductor 21. In the open state, the moving contact 22 moves to separate from the first contact finger 12. In the closed state, the moving contact 22 is inserted into the inner side of the first contact finger 12.

[0028] The moving side conductor 21 of the present application is an annular hollow structure, which is provided with a circular inner cavity. The moving contact 22 can move in the circular inner cavity. The circular inner cavity of the moving side conductor 21 is connected to the external space to form an air flow channel, which is conducive to the heat dissipation of the conductive circuit.

[0029] Furthermore, in the open state, the movable contact 22 and the movable conductor 21 have a clearance fit, specifically, the clearance between the circular inner cavity of the movable conductor 21 and the outer circle of the movable contact 22 is 2-7 mm. The clearance between the movable conductor 21 and the movable contact 22 can prevent the movable contact 22 from moving radially in the movable conductor 21, thereby ensuring that the movable contact 22 and the movable conductor 21 are always in a coaxial state.

[0030] Furthermore, a second contact finger 23 is provided at the end of the moving-side conductor 21 close to the first contact finger 12, and the second contact finger 23 is used for conducting electricity; the moving contact 22 includes a first mating end 24 and a second mating end 25 which are arranged opposite to each other. In the embodiment disclosed in the present application, the first mating end 24 is a small cylindrical surface, and the second mating end 25 is a large cylindrical surface; in the closed state, the first mating end 24 is inserted into the first contact assembly 1 and connected with the first contact finger 12, and at the same time, the second mating end 25 is connected with the second contact finger 23 at the end of the moving-side conductor 21.

[0031] Exemplarily, when the moving contact 22 gradually moves from the open position to the closed position, when the first mating end 24 of the moving contact 22 contacts the first contact finger 12 on the static side conductor 11, the second mating end 25 of the moving contact 22 can contact the second contact finger 23 on the moving side conductor 21. At this time, a complete conductive circuit is formed between the moving side conductor 21, the second contact finger 23, the moving contact 22 and the static side conductor 11. At the same time, the air flow channel formed by the circular inner cavity of the moving side conductor 21 and the circular inner cavity of the static side conductor 11 dissipates heat for the conductive circuit.

[0032] As shown in combination with Figures 3 to 5, the guide assembly 3 includes a first guide rail 31 and a second guide rail 32. The first guide rail 31 is fixed to the moving side conductor 21, and an installation gap is formed between the first guide rail 31 and the moving side conductor 21. The second guide rail 32 is arranged in the installation gap. The first guide rail 31 is slidably connected with the second guide rail 32, and the moving contact 22 is fixed on the second guide rail 32. The first guide rail 31 is a static guide rail, and the second guide rail 32 is a moving guide rail. When the moving contact 22 moves, the second guide rail 32 slides on the first guide rail 31. The first guide rail 31 and the second guide rail 32 can guide the movement of the moving contact 22. Under the guiding action of the first guide rail 31 and the second guide rail 32, the moving contact 22 can better perform opening and closing operations along the axial direction.

[0033] In the embodiment disclosed in the present application, the outer contours of the first guide rail 31 and the second guide rail 32 are both U-shaped, the first guide rail 31 is nested inside the second guide rail 32, and there is a clearance fit between the first guide rail 31 and the second guide rail 32, and the fitting clearance is 0.5-2mm. Combined with the arrangement that the second guide rail 32 is accommodated in the installation gap, the second guide rail 32 can be stably installed, and the second guide rail 32 and the moving contact 22 will not be radially displaced in the moving-side conductor 21, which can ensure the stability of the moving contact 22 during the full stroke movement, so that the moving contact 22 can reliably contact the first contact finger 12.

[0034] A connector 26 (as shown in FIG. 1 ) is provided inside the moving-side conductor 21 . The connector 26 is used to install the first guide rail 31 inside the moving-side conductor 21 . Specifically, a connecting hole is provided on the connector 26 , and a mounting hole 33 corresponding to the connecting hole is provided on the first guide rail 31 . The connecting hole and the mounting hole 33 are used to cooperate with fasteners. After the fasteners penetrate the connecting hole and the mounting hole 33 , the first guide rail 31 can be fixed to the moving-side conductor 21 . The fasteners can be bolts, screws, pins and other components. In some embodiments, a reinforcing body 27 is also provided inside the moving-side conductor 21 . The reinforcing body 27 and the connector 26 together provide support force and installation position for the first guide rail 31 .

[0035] The number of the connecting holes and the mounting holes 33 are the same and their positions correspond. The number of the connecting holes and the mounting holes 33 is at least two. In the embodiment disclosed in the present application, the number of the connecting holes and the mounting holes 33 are both two. In other embodiments, other numbers of connecting holes and mounting holes 33 may also be set, for example, three, four, etc.

[0036] The distance between the two mounting holes 33 is not less than half the length of the first guide rail 31. The location of the mounting holes 33 can be regarded as a support point for supporting the first guide rail 31. The distance between the two mounting holes 33 is set to be not less than half the length of the first guide rail 31, that is, by increasing the distance between the two support points of the first guide rail 31, the length of the cantilever end of the first guide rail 31 is reduced. Explanatory, the first mounting hole 33 is located at the first end of the first guide rail 31, and the second mounting hole 33 is located at a position between the midpoint of the first guide rail 31 and the second end of the first guide rail 31, which can effectively avoid the phenomenon of the second end (cantilever end) of the first guide rail 31 sagging due to the change of the center position during the full stroke movement. The present application reduces the length of the cantilever of the first guide rail 31 by setting the distance between the mounting holes 33 to be not less than half the length of the first guide rail 31, thereby improving the installation stability of the first guide rail 31, and also avoiding the phenomenon of sagging of the first guide rail 31 and the moving contact 22, effectively improving the stability of the moving contact 22 during the full stroke movement and the operational reliability of the switch device.

[0037] With the coordinated arrangement of the moving side conductor 21, the moving contact 22, the first guide rail 31, the second guide rail 32, the mounting hole 33 and other structures, even a switch device with a large capacity and a large stroke can ensure that the moving contact 22 can stably switch between the opening and closing positions along the axial direction, and the moving contact 22 will not sag or shift.

[0038] The guide assembly 3 also includes a rolling member 34, which is arranged between the first guide rail 31 and the second guide rail 32 and is rotatably connected to the second guide rail 32. When the second guide rail 32 slides relative to the first guide rail 31, the rolling member 34 is in a rotating state, and at the same time, the outer peripheral surface of the rolling member 34 cooperates with the first guide rail 31 to realize walking on the first guide rail 31 (that is, the rolling member 34 rolls along the first guide rail 31). During the full stroke movement of the moving contact 22, the opening and closing movement is realized in the form of rolling movement, which can improve the movement efficiency of the moving contact 22. In the embodiment disclosed in the present application, the rolling member 34 can be a bearing, and in other embodiments, the rolling member 34 can also be a component with a rolling movement form such as a steel ball.

[0039] The guide assembly 3 also includes a support member 35, which is located between the first guide rail 31 and the second guide rail 32, and the support member 35 is fixedly connected to the second guide rail 32, and the support member 35 is used to install the rolling member 34. Specifically, the support member 35 includes a support portion and a limiting portion, and the support portion and the limiting portion are connected to each other. Preferably, the support portion and the limiting portion are integrally formed. In the embodiment disclosed in the present application, the support portion is fixed to the second guide rail 32 by screws; the rolling member 34 is sleeved on the support portion, and the limiting portion is located at one end of the support portion away from the second guide rail 32. The limiting portion protrudes out of the support portion and abuts against the end face of the rolling member 34. The limiting portion is used to limit the rolling member 34 to prevent the rolling member 34 from moving left and right between the first guide rail 31 and the second guide rail 32. In the embodiment disclosed in the present application, the support portion and the limiting portion are both cylindrical, and the cylindrical diameter of the limiting portion is larger than the cylindrical diameter of the support portion, so that the limiting portion can limit the rolling member 34.

[0040] The guide assembly 3 also includes a limit member 36, which is arranged between the support member 35 and the first guide rail 31. The limit member 36 is used to limit the support member 35 to prevent the support member 35 from moving left and right between the first guide rail 31 and the second guide rail 32; further, while the limit member 36 limits the support member 35, it can also fix the matching gap between the first guide rail 31 and the second guide rail 32. The matching gap can prevent the moving contact 22 from moving radially in the moving side conductor 21, which can effectively prevent the moving contact 22 from sagging due to the change of the center position during the full stroke movement. Explanatoryally, as shown in FIG. 2 , if the moving contact 22 droops, the moving contact 22 located at the top will have less contact with the first contact finger 12 and the second contact finger 23, and the moving contact 22 located at the bottom will have more contact with the first contact finger 12 and the second contact finger 23. At this time, the moving contact 22 and the moving-side conductor 21 are in an eccentric state, and the moving contact 22 and the first contact finger 12 and the second contact finger 23 are in uneven contact, which will affect the accuracy of the axial movement of the moving contact 22 and the stability of the connection between the moving contact 22 and the first contact finger 12 and the second contact finger 23. The present application can avoid the sagging of the moving contact 22 due to the change of the center position during the full stroke movement through the setting of the limit member 36, thereby ensuring that the moving contact 22 and the moving-side conductor 21 are in a coaxial state.

[0041] The guide assembly 3 also includes a spacer 37, which is arranged between the second guide rail 32 and the rolling element 34. The spacer 37 can be in a plate shape and can separate the rolling element 34 from the second guide rail 32 to block the friction force caused by the rolling element 34 on the second guide rail 32 when rolling.

[0042] The guide assembly 3 further includes a guide member 38, which is connected to the static side conductor 11. The guide member 38 is used to guide the moving contact 22 to be inserted into the static side conductor 11. Specifically, a guide channel is formed between the guide member 38 and the first contact finger 12. In the closed state, the moving contact 22 can be connected to the first contact finger 12 after being inserted into the guide channel. The guide member 38 and the guide channel can guide the first mating end 24 of the moving contact 22. When the moving contact 22 approaches the first contact finger 12 before the closed state, the axial direction of the moving contact 22 is first corrected by the guide member 38 and the guide channel, so that the moving contact 22 can be smoothly and accurately inserted between the guide member 38 and the first contact finger 12.

[0043] The linear switch device also includes a driving assembly, which is used to drive the moving contact 22 to move toward or away from the first contact assembly 1 to implement the opening and closing operation of the switch device. Specifically, the driving assembly includes a driving member and a transmission member 41, the driving member is connected to the transmission member 41, and the moving side conductor 21 is provided with an offset circular through hole 42, as shown in Figure 1, the driving member transmits power to the transmission member 41 through the offset circular through hole 42, the transmission member 41 is rod-shaped, and the transmission member 41 is radially arranged inside the moving contact 22, and the transmission member 41 is used to transmit the driving force of the driving member to the moving contact 22 to drive the moving contact 22 to move.

[0044] During the specific installation, a baffle and an open-type pad can be set on the moving contact 22, and an open-type gasket can also be arranged in the assembly gap between the open-type pad and the transmission member 41. The transmission member 41 is connected to the moving contact 22 through the baffle, the open-type pad and the open-type gasket. The baffle, the open-type pad and the open-type gasket can limit the transmission member 41 to prevent the transmission member 41 from shifting.

[0045] When the linear switch device of the present application is in use, the driving force of the driving member transmits the power to the transmission member 41 through the offset circular through hole 42. The transmission member 41 is driven by the force to drive the moving contact 22 to move. At the same time, the second guide rail 32 moves along the first guide rail 31, and the rolling member 34 rolls forward along the first guide rail 31, thereby realizing the opening and closing operations of the linear switch device.

[0046] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0048] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A linear switch device, characterized in that: include: a first contact assembly; A second contact assembly includes a moving contact and a moving-side conductor sleeved on the outer periphery of the moving contact, wherein the moving contact is movable relative to the moving-side conductor, and the moving contact includes an opening state and a closing state. In the opening state, the moving contact is separated from the first contact assembly; in the closing state, the moving contact is inserted into the first contact assembly; and A guide assembly comprises a first guide rail and a second guide rail, wherein the first guide rail is fixed to the moving side conductor and an installation gap is formed between the first guide rail and the moving side conductor, the second guide rail is arranged in the installation gap and is connected to the moving contact, the first guide rail and the second guide rail are slidably connected, and the guide assembly is used to limit the moving path of the moving contact so that the moving contact can switch axially between the open state and the closed state.

2. The linear switch device according to claim 1, characterized in that: The first guide rail is provided with a mounting hole, and the mounting hole is used to cooperate with a fastener to fix the first guide rail to the moving side conductor. The mounting holes include two, and the distance between the two mounting holes is not less than half the length of the first guide rail.

3. The linear switch device according to claim 1, characterized in that: The moving contact includes a first mating end and a second mating end that are arranged opposite to each other. In the open state, the moving contact is gap-fitted with the moving-side conductor; in the closed state, the first mating end is inserted into the first contact assembly, and the second mating end is connected to the moving-side conductor.

4. The linear switch device according to claim 1, characterized in that: The guide assembly also includes a rolling member, which is arranged between the first guide rail and the second guide rail and is rotatably connected to the second guide rail. When the second guide rail slides relative to the first guide rail, the rolling member can move on the first guide rail.

5. The linear switch device according to claim 4, characterized in that: The guide assembly also includes a support member, which is fixedly connected to the second guide rail. The support member includes a supporting portion and a limiting portion that are connected to each other. The rolling member is sleeved on the supporting portion. The limiting portion protrudes out of the supporting portion and abuts against the end face of the rolling member. The limiting portion is used to limit the rolling member.

6. The linear switch device according to claim 5, characterized in that: The guide assembly further includes a limiting member, which is disposed between the support member and the first guide rail and is used to limit the support member.

7. The linear switch device according to claim 4, characterized in that: The guide assembly further comprises a barrier member, which is disposed between the second guide rail and the rolling member and is used to block the friction force of the rolling member on the second guide rail.

8. The linear switch device according to claim 1, characterized in that: The first contact assembly further includes a static conductor, and the guide assembly further includes a guide member, wherein the guide member is connected to the static conductor and is used to guide the moving contact to be inserted into the static conductor.

9. The linear switch device according to any one of claims 1 to 8, characterized in that: The linear switch device further comprises a driving member, wherein the driving member is connected to the moving contact and is used for driving the moving contact to move towards or away from the first contact assembly.

10. The linear switch device according to claim 9, characterized in that: The linear switch device further comprises a transmission member, the driving member is connected to the transmission member, the transmission member is radially arranged inside the moving contact, and the transmission member is used to transmit the driving force of the driving member to the moving contact.

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