A fuse switch

Abstract

The present invention discloses a fuse switch, comprising a fuse element, a contact mechanism and a driving mechanism installed in a shell. The driving mechanism comprises a driving rod movably arranged at one end of the shell, and a linkage structure connecting the driving rod and the moving contact. The linkage structure reciprocates under the drive of the driving rod, and drives the moving contact to contact or separate from the static contact. Two plug-in terminals are provided at one end of the shell. The fuse switch can be directly plugged into a connection port of a communication system through the two plug-in terminals to realize plug-in installation. The operation is simple and convenient, and the space restriction is small. The manual opening and closing function can be realized without removing the fuse element. The use is safe and reliable, so that the product meets the standardized and modular installation requirements, improves the installation efficiency, and enhances the product's performance. The product can well adapt to the development of 5G communication technology and has good market prospects and benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage fuses, and in particular to a fuse switch. Background Art

[0002] A fuse switch is an electrical appliance that plays a role in safety protection. It can be used for isolation protection between power supply and load, and is also widely used as protection for power grids and electrical equipment. It is one of the most commonly used protection devices. When a short circuit or overload occurs in the line of a power grid or electrical equipment, the fuse switch can automatically cut off the circuit to avoid damage to the electrical equipment and prevent the accident from spreading. The fuse switch mainly uses the fuse to overheat and melt when the circuit is overloaded or short-circuited, causing excessive current, thereby protecting the electrical equipment.

[0003] The fuse switches of the prior art can be divided into two types, namely, direct-pull type and rotary type, according to the method of replacing the fuse. Among them, the basic structure of the direct-pull fuse mainly consists of three parts: the fuse, the fuse carrier and the fuse base. The fuse carrier is provided with a cavity for placing the fuse, and two contact ends are provided at both ends of the fuse. The top of the fuse base is provided with an insertion port, and the fuse carrier is vertically inserted into the fuse base from the insertion port. Fixed contacts and wiring terminals that cooperate with the contact heads are provided in the fuse base. The fixed contacts are not only used to install and fix the fuse, but also to realize the electrical connection between the fuse and the circuit. When replacing or installing the fuse of the direct-pull fuse, the fuse carrier that carries the fuse in the fuse base is directly pulled out of the top of the fuse base to separate the fuse from the contacts. The advantage of this structure is that the isolation distance between the fuse and the contacts is large and the safety is good, but the operation is laborious and inconvenient.

[0004] In addition, rotary fuses are also relatively common on the market. For example, Chinese patent document CN108597971A discloses a switch-type fuse, including a shell and two electrical connection components located at both ends of the shell. A mounting seat rotatably connected to the shell is installed in the middle of the shell, and a fuse is installed in the mounting seat. When the mounting seat is rotatably engaged on the shell, the two ends of the fuse are respectively connected to the two electrical connection components. The electrical connection component includes an external connection frame and a connecting plate connected to the external connection frame. The connecting plate is connected to a spring. When the rotary fuse is replaced or installed, the fuse carrier is rotated around a fixed fulcrum of the shell by an angle, so that the mounting seat is opened from the top of the shell, the fuse is separated from the electrical connection component, and the fuse is de-energized.

[0005] At present, with the development of 5G communication technology industry, the use of fuse switches to protect the safety and operation of communication systems and equipment has become an increasingly important technical measure. However, the existing fuse switches still have the following problems in practical applications: 1. Since communication systems and equipment are mostly installed in closed and narrow cabinet spaces, in order to facilitate inspection and maintenance, it is often chosen to directly disconnect the electrical connection of the fuse switch. However, due to space limitations, it is difficult to pull the fuse from the top of the fuse by straight pulling and rotating. The operation is inconvenient, and the risk of live operation is also high, and the practicality is poor; 2. 5G communication systems require higher standardization and modular installation. The existing fuse switches use terminal blocks to connect wires for installation. The installation process is cumbersome and inefficient, the wiring is complicated, and it cannot be installed and used in conjunction with the communication system, and thus cannot adapt well to the development of 5G communication technology. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the direct-pull and rotary fuses in the prior art cannot be used in the communication system, are inconvenient to operate, cumbersome and inefficient to install, and cannot adapt well to the development of 5G communication technology, thereby providing a fuse switch that can be used in conjunction with the communication system, is simple and convenient to operate, has high installation efficiency, is easy to inspect and maintain, and can adapt well to the development of 5G communication technology.

[0007] The present invention provides a fuse switch, comprising:

[0008] a housing in which a melt is mounted;

[0009] A contact mechanism, comprising a moving contact rotatably arranged on the housing, and a stationary contact arranged opposite to the moving contact, wherein the moving contact is connected to one end of the melt;

[0010] A driving mechanism connected to the contact mechanism for driving the moving contact to contact or separate from the stationary contact; the driving mechanism comprises a driving rod movably disposed through one end of the housing, and a linkage structure connecting the driving rod and the moving contact, the linkage structure reciprocating under the drive of the driving rod, and having a first position state in which the moving contact is driven to rotate and contact with the stationary contact, and a second position state in which the moving contact is driven to rotate and separate from the stationary contact;

[0011] Two plug terminals are installed in two slots formed at the other end of the shell and are connected to the contact mechanism and the fuse respectively.

[0012] As a preferred solution, the linkage structure includes an eccentric shaft rotatably arranged on the shell, a first connecting rod connecting the eccentric shaft and the moving contact, and a second connecting rod connecting the eccentric shaft and the driving rod, the first connecting rod, the eccentric shaft, the second connecting rod and the driving rod are arranged in sequence along the length direction of the shell; the eccentric shaft is subjected to force and drives the moving contact to rotate in a direction close to or away from the static contact through the first connecting rod during the reciprocating rotation.

[0013] As a preferred embodiment, an elastic component is arranged between the moving contact and the housing, and the elastic component is arranged at an angle with the first connecting rod when the moving contact and the static contact are in contact, and applies a biasing force on the moving contact to keep the moving contact in contact with the static contact; the elastic component is arranged parallel to the first connecting rod when the moving contact and the static contact are separated, and applies a biasing force on the moving contact to move away from the static contact.

[0014] As a preferred solution, the elastic component is a tension spring structure, a hook is provided at one end of the moving contact connected to the first connecting rod, a fixed shaft is provided in the shell and is located on one side of the eccentric shaft, and both ends of the tension spring structure are respectively connected to the hook and the fixed shaft.

[0015] As a preferred embodiment, the eccentric shaft includes an arc-shaped rotating part, and a first boss and a second boss arranged on the side wall of the rotating part, and the rotating part is rotatably connected to the shell through a rotating shaft, and the first boss and the second boss are respectively connected to the first connecting rod and the second connecting rod.

[0016] As a preferred embodiment, a limiting structure for limiting the rotational travel of the eccentric shaft is provided between the shell and the eccentric shaft, and the limiting structure includes an arc baffle formed in the shell, and the first boss and the second boss respectively cooperate and abut against two ends of the arc baffle during the rotation of the eccentric shaft.

[0017] As a preferred solution, the driving rod can move back and forth along the length direction of the shell, one end of the driving rod is an operating end extending out of one end of the shell, and the other end is a driving end facing the eccentric shaft, and an inclined extending driving groove is formed on the driving end; the second connecting rod and the first connecting rod are respectively U-shaped rod structures, one end of the second connecting rod is inserted into the driving groove, and the other end is connected to the connecting hole of the second boss.

[0018] As a preferred embodiment, the two ends of the fuse are respectively connected to a first conductive plate and a second conductive plate, the moving contact is connected to the first conductive plate through a flexible connection, the second conductive plate is connected to one of the plug-in terminals, and the static contact is connected to the other plug-in terminal; an arc extinguishing chamber is provided on one side of the contact port formed by the moving contact and the static contact.

[0019] As a preferred solution, a signal indicator light is provided at one end of the shell, and the signal indicator light is provided in parallel between the static contact and the other end of the fuse. The signal indicator light is lit or not lit when the moving and static contacts are closed to indicate that the fuse is blown or working normally, and is lit when the moving and static contacts are disconnected to indicate that the fuse switch is in the open state.

[0020] As a preferred embodiment, the plug-in terminal is fixed to the slot opening by a mounting structure. The plug-in terminal is a U-shaped structure, which includes a bite portion protruding toward each other by bending side walls on both sides, and a V-shaped port extending from the bite portion to one side of the slot opening. The mounting structure includes two limiting grooves arranged on both sides of the opening of the slot opening, and two limiting bosses arranged relatively upper and lower inside the slot opening. The plug-in terminal is squeezed and inserted between the two limiting bosses, and its two ends are respectively abutted against the two limiting grooves.

[0021] The technical solution of the present invention has the following advantages compared with the prior art:

[0022] 1. The fuse switch provided by the present invention can directly plug the housing carrying the fuse into the connection port of the communication system through two plug-in terminals, and can be installed in place in one step to achieve installation and use with the communication system, thus avoiding the installation method of connecting the wires with the wiring terminals, and when replacing the product, the plug-in terminals can be directly pulled out, which simplifies the installation structure and realizes plug-in installation. When repairing and maintaining the communication equipment, it is only necessary to pull the driving rod outward at one end of the housing to drive the moving contact and the static contact to separate through the linkage structure to realize the power-off operation of the fuse switch, without having to disconnect the power cord. Turning on the main switch is simple and convenient to operate, and is less restricted by space. After completing the inspection and maintenance, just push the driving rod inward at one end of the shell to drive the moving contact and the static contact through the linkage structure to realize the power-on operation of the fuse switch. The fuse switch with this structural design can realize the manual opening and closing function without removing the fuse. The overall structure is compact, safe and reliable to use, and easy to operate. It can meet the requirements of standardized and modular installation, improve installation efficiency, and enhance the performance of the product. It can adapt well to the development of 5G communication technology, has good practicality, and has good market prospects and benefits.

[0023] 2. In the fuse switch provided by the present invention, when the first connecting rod drives the moving contact to make contact with the static contact, the elastic component will undergo elastic deformation as the moving contact rotates and be set at an angle with the first connecting rod to reach a force balance state, so that the relative position balance between the first connecting rod, the moving contact and the elastic component can be maintained. In this way, the first pull rod can be prevented from being tripped as the eccentric shaft is reversed, and the elastic component tightens the moving contact in the closed state, thereby applying a biasing force to the moving contact to keep in contact with the static contact, and the moving contact and the static contact at this time are maintained in a closed contact state; when the first connecting rod drives the moving contact and the static contact to open and disconnect, the elastic component approaches the first connecting rod during the rotation of the moving contact and then tends to be parallel, so that the two exert a force with the same movement trend on the moving contact, so that under the joint action of the elastic component and the first connecting rod, the moving contact can be driven by a combined force to rotate in a direction away from the static contact, thereby ensuring the sensitivity of the moving contact triggering, the quick response, and the realization of a quick opening operation.

[0024] 3. The fuse switch provided by the present invention, when the eccentric shaft rotates forward under the drive of the driving rod, the moving contact and the static contact are driven to make contact through the first connecting rod, and the first boss rotates and abuts against one end of the arc baffle to prevent the eccentric shaft from continuing to rotate. At this time, the eccentric shaft is closed and rotated into place, which corresponds to the linkage structure being in the first position state. Similarly, when the eccentric shaft rotates reversely under the drive of the driving rod, the moving contact and the static contact are opened and disconnected through the first connecting rod, and the second boss rotates and abuts against the other end of the arc baffle to prevent the eccentric shaft from continuing to rotate. At this time, the eccentric shaft is closed and rotated into place, which corresponds to the linkage structure being in the second position state. This design limits the closing and opening rotation stroke of the eccentric shaft, ensuring that the eccentric shaft rotates back and forth within the rotation stroke. The design is reasonable and the fit is reliable.

[0025] 4. The fuse switch provided by the present invention has a driving slot obliquely arranged on the driving end so that one end of the second connecting rod is slidably connected to the driving slot. When the driving rod moves into the shell, one end of the second connecting rod slides and abuts against the innermost end of the driving slot. The second connecting rod is pushed through the driving slot to drive the eccentric shaft to rotate around the axis. During the sliding process of the second connecting rod along the driving slot, it gradually shifts closer to one side of the eccentric shaft, thereby shortening the force arm distance from the second connecting rod to the rotation axis of the eccentric shaft, thereby achieving a labor-saving operation effect, thereby saving labor and being more convenient when pushing the driving rod to close the switch, thereby improving the operating feel of the product.

[0026] 5. The fuse switch provided by the present invention can be easily inserted into the connection port of the communication equipment through the plug-in terminal, and can be installed in a cabinet equipped with the communication equipment. The plug-in terminal includes a bite portion protruding toward each other by bending the side walls on both sides, and a V-shaped port extending from the bite portion to one side of the slot opening. The contact pressure of the plug-in terminal can be increased by the bite portion, and the contact between the two is stable and reliable. With the widespread use of plug-in fuses in 5G communication systems and equipment, the safety of the communication industry can be significantly improved, and the installation and use are more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the drawings required for use in the specific implementation or the description of the prior art will be briefly introduced below.

[0028] Figure 1 A schematic diagram of the three-dimensional structure of the fuse switch provided by the present invention;

[0029] Figure 2 It is a structural schematic diagram of the fuse switch of the present invention in an open state;

[0030] Figure 3 It is a structural schematic diagram of the fuse switch of the present invention in a closed state;

[0031] Figure 4 It is a partial enlarged structural schematic diagram of the linkage structure of the present invention;

[0032] Figure 5 It is a schematic diagram of the circuit structure of the signal indicator light of the present invention;

[0033] Explanation of the accompanying drawings: 1-shell, 11-slot opening, 12-fixed shaft, 13-arc baffle, 14-limiting groove, 15-limiting boss, 2-melt, 21-first conductive plate, 22-second conductive plate, 3-moving contact, 30-arc extinguishing chamber, 4-static contact, 41-limiting bayonet, 5-driving rod, 51-operating end, 52-driving end, 53-driving slide groove, 6-linkage structure, 61-eccentric shaft, 611-rotating part, 612-first boss, 613-second boss, 62-first connecting rod, 63-second connecting rod, 7-plug-in terminal, 71-bite part, 72-V-shaped port, 8-elastic component, 9-signal indicator light. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] Example 1

[0037] The present invention provides Figure 1-5 A fuse switch is shown, comprising:

[0038] A shell 1, in which a melt 2 is installed;

[0039] A contact mechanism, comprising a moving contact 3 rotatably arranged on the housing 1, and a stationary contact 4 arranged opposite to the moving contact 3, wherein the moving contact 3 is connected to the melt 2;

[0040] a driving mechanism connected to the contact mechanism for driving the moving contact 3 to contact or separate from the stationary contact 4; the driving mechanism comprises a driving rod 5 movably disposed at one end of the housing 1, and a linkage structure 6 connecting the driving rod 5 and the moving contact 3, the linkage structure 6 reciprocating under the drive of the driving rod 5, and having a first position state in which the moving contact 3 is driven to rotate and contact with the stationary contact 4, and a second position state in which the moving contact 3 is driven to rotate and separate from the stationary contact 4;

[0041] Two plug terminals 7 are installed in two slots 11 formed at the other end of the housing 1 and are respectively connected to the contact mechanism and the fuse, so that a conductive circuit passing through the fuse, the moving contact and the stationary contact is formed between the two plug terminals 7 .

[0042] In the above-mentioned embodiment, the housing 1 carrying the fuse can be directly plugged into the connection port of the communication system through two plug-in terminals 7, and can be installed in place in one step to achieve installation and use with the communication system, thus avoiding the use of the installation method of connecting the wires with the wiring terminals, and when replacing the product, the plug-in terminals can be directly pulled out, which simplifies the installation structure and realizes plug-in installation. When repairing and maintaining the communication equipment, it is only necessary to pull the driving rod 5 outward at one end of the housing 1 to drive the moving contact 3 and the static contact 4 to separate through the linkage structure 6 to realize the power-off operation of the fuse switch, so that there is no need to disconnect the main switch to avoid paralysis of large-scale lines and power outages. The operation is simple and convenient, and is popular. The space restriction is small. After completing the inspection and maintenance, it is only necessary to push the driving rod 5 inward at one end of the shell 1, and drive the moving contact 3 to contact the static contact 4 through the linkage structure 6 to realize the power-on operation of the fuse switch. The fuse switch with this structural design can realize the manual opening and closing function without removing the fuse, and when replacing the fuse, it is only necessary to pull out the entire fuse switch and then reinsert the replaced or new fuse switch. The overall structure is compact, easy to operate and use, safe and reliable to use, can meet the standardized and modular installation requirements, improve installation efficiency, enhance the product performance, can adapt well to the development of 5G communication technology, has good practicality, and has good market prospects and benefits.

[0043] Combine the following Figure 2-4 The specific setting method of the linkage structure is described in detail:

[0044] The linkage structure 6 includes an eccentric shaft 61 rotatably arranged on the housing 1, a first connecting rod 62 connecting the eccentric shaft 61 and the moving contact 3, and a second connecting rod 63 connecting the eccentric shaft 61 and the driving rod 5. The first connecting rod 62, the eccentric shaft 61, the second connecting rod 63 and the driving rod 5 are arranged in sequence along the length direction of the housing 1. With this structural arrangement, the first connecting rod 62, the eccentric shaft 61 and the second connecting rod play a force transmission role between the moving contact and the driving rod, thereby converting the horizontal thrust of the driving rod 5 into the rotational torque required for the opening and closing of the moving contact 3. The first connecting rod and the first connecting rod 62 will swing with different amplitudes when the eccentric shaft 61 rotates, so that the eccentric shaft 61 is subjected to force and drives the moving contact 3 to rotate in a direction close to or away from the static contact 4 through the first connecting rod 62 during the reciprocating rotation.

[0045] Combination Figure 2-3As shown, an elastic component 8 is arranged between the moving contact 3 and the housing 1. When the moving contact 3 and the stationary contact 4 are in contact, the elastic component 8 is arranged at an angle with the first connecting rod 62, and applies a biasing force on the moving contact 3 to keep in contact with the stationary contact; when the moving contact 3 and the stationary contact 4 are separated, the elastic component 8 is arranged parallel to the first connecting rod 62, and applies a biasing force on the moving contact 3 to move away from the stationary contact. It can be known from the above structure that when the first connecting rod 62 drives the moving contact to contact with the static contact when closing, the elastic component 8 will be elastically deformed with the rotation of the moving contact 3 and be set at an angle with the first connecting rod, and reach a force balance state, so that the relative position balance between the first connecting rod 62, the moving contact 3 and the elastic component 8 is maintained, so that the first pull rod 62 can be prevented from reverse tripping with the eccentric shaft, that is, when the fuse switch is closed, the elastic component 8 tightens the moving contact 3 in the closed state, and the first pull rod pushes the moving contact to contact with the static contact, so that the moving contact and the static contact are in the first A connecting rod and an elastic component maintain a closed contact state when a force balance is reached; when the first connecting rod 62 drives the moving contact 3 to open and disconnect from the static contact 4, the elastic component 8 approaches the first connecting rod 62 during the rotation of the moving contact 3 and then tends to be parallel, thereby changing the force direction of the elastic component 8 on the moving contact, that is, when the fuse switch is in the open state, the first connecting rod 62 and the elastic component 8 apply forces with the same movement trend to the moving contact, so that under the joint action of the two, the moving contact 3 can be driven to rotate in the direction away from the static contact 4, thereby ensuring the sensitivity of the moving contact triggering, the quick response, and the realization of a quick opening operation.

[0046] As a preferred embodiment, the elastic component 8 is a tension spring structure, and a hook is provided at one end of the moving contact 3 connected to the first connecting rod 62 (not shown in the drawings). A fixed shaft 12 located on one side of the eccentric shaft 61 is provided in the housing 1, and the two ends of the tension spring structure are respectively connected to the hook and the fixed shaft 12, thereby realizing the installation and fixation of the elastic component 8, so that the elastic component undergoes deformation as the moving contact rotates.

[0047] Combination Figure 2-4As shown, the eccentric shaft 61 includes an arc-shaped rotating portion 611, and a first boss 612 and a second boss 613 arranged on the side wall of the rotating portion 611. The rotating portion 611 is rotatably connected to the shell 1 through a rotating shaft. The rotating portion is provided with a rotating hole connected to the rotating shaft. The first boss 612 and the second boss 613 are respectively connected to the first connecting rod 62 and the second connecting rod 63. In order to limit the rotation stroke of the eccentric shaft 61, a limiting structure is provided between the shell 1 and the eccentric shaft 61. The limiting structure includes an arc baffle 13 formed in the shell 1. The first boss 612 and the second boss 613 respectively cooperate with the two ends of the arc baffle 13 during the rotation of the eccentric shaft 61. With this structural arrangement, when the eccentric shaft 61 is driven by the driving rod 5, When rotating in the forward direction, the first connecting rod 62 drives the moving contact 3 and the static contact 4 to close the switch, and when the first boss 612 rotates and abuts against one end of the arc baffle to prevent the eccentric shaft from continuing to rotate, the eccentric shaft 61 is now closed and rotated into place, which corresponds to the linkage structure 6 being in the first position. Similarly, when the eccentric shaft 61 rotates in the reverse direction driven by the driving rod, the first connecting rod drives the moving contact and the static contact to open and disconnect, and when the second boss 613 rotates and abuts against the other end of the arc baffle to prevent the eccentric shaft 61 from continuing to rotate, the eccentric shaft is now closed and rotated into place, which corresponds to the linkage structure 6 being in the second position. This design limits the rotation stroke of the eccentric shaft 61 for opening and closing, and ensures that the eccentric shaft 61 rotates back and forth within the rotation stroke. The design is reasonable and the fit is reliable. In this article, forward rotation and reverse rotation refer to the two opposite rotation directions of a component, and do not indicate the actual rotation direction of the component.

[0048] Further settings, such as Figure 2As shown, the driving rod 5 can reciprocate along the length direction of the shell 1, one end of the driving rod 5 is an operating end 51 extending out of one end of the shell, and the other end is a driving end 52 facing the eccentric shaft 61, and an inclined extending driving groove 53 is formed on the driving end 52; the second connecting rod 63 and the first connecting rod 62 are respectively U-shaped rod structures, one end of the second connecting rod 63 is slidably penetrated in the driving groove 53, and the other end is connected to the connecting hole of the second boss 613, and the first boss 612 is also formed with a connecting hole for connecting the first connecting rod 62. The advantage of this design is that One end of the second connecting rod 63 is slidably connected to the driving slot 53. When the driving rod 6 moves into the shell, one end of the second connecting rod 63 slides and abuts against the innermost end of the driving slot 53. The driving slot 53 pushes the second connecting rod 63 to drive the eccentric shaft 61 to rotate around the axis. During the sliding process of the second connecting rod 63 along the driving slot, it gradually moves closer to one side of the eccentric shaft 61, so that the force arm distance from the second connecting rod to the rotation axis of the eccentric shaft is shortened, thereby achieving the effect of labor-saving operation. It is more labor-saving and convenient when pushing the driving rod 5 to close the switch, thereby improving the operating feel of the product.

[0049] The following combination Figure 1-2 The specific installation method of the plug-in terminal is described in detail:

[0050] The slot opening 11 is extended along the length direction of the shell, and the plug-in terminal 7 is fixed to the slot opening 11 through a mounting structure. The plug-in terminal 7 is a U-shaped structure, which includes a bite portion 71 that is bent and protrudes toward each other by the side walls on both sides, and a V-shaped port 72 that extends from the bite portion 71 to one side of the slot opening 11. The opening range of the plug-in terminal 7 can be expanded by means of the V-shaped port 72. Further preferably, the mounting structure includes two limiting grooves 14 arranged on both sides of the opening of the slot opening 11, and two limiting bosses 15 that are relatively arranged inside the slot opening 11 up and down, and the plug-in terminal 7 is squeezed and plugged into the two limiting bosses 1 5, and its two ends respectively abut against the two limiting grooves 14, and the cooperation of the limiting grooves 14 and the limiting bosses 15 plays a limiting installation role on the plug-in terminal 7, thereby ensuring the installation stability of the plug-in terminal 7 in the slot opening 11. In summary, it can be seen that the fuse switch of this embodiment can be easily inserted into the connection port of the communication equipment through the plug-in terminal 7, and the plug-in installation is realized in the cabinet equipped with the communication equipment. The contact pressure of the plug-in terminal can be increased through the bite portion, and the matching contact is stable and reliable. With the widespread use of plug-in fuses in 5G communication systems and equipment, the safety of the communication industry can be significantly improved, and the installation and use are more flexible.

[0051] In this embodiment, an arc extinguishing chamber 30 is provided on one side of the contact opening formed by the moving contact 3 and the static contact 4. The arc extinguishing chamber can extinguish the arc generated by the breaking of the moving and static contacts. Figure 2-3 As shown, the two ends of the fuse 2 are respectively connected to the first conductive plate 21 and the second conductive plate 22, the moving contact 3 is connected to the first conductive plate 21 through a soft connection, the second conductive plate is connected to one of the plug-in terminals 7, and the static contact is connected to the other plug-in terminal. It can be seen from the above structure that when the moving and static contacts are closed and contacted, a conductive circuit is formed between the two plug-in terminals 7, which passes through the first conductive plate, the static contact, the moving contact, the fuse and the second conductive plate in sequence, thereby realizing the closing and power-on and opening and power-off operations of the fuse switch.

[0052] In order to facilitate the staff to clearly know the working status of the fuse switch, so as to facilitate the inspection and maintenance work, a signal indicator light 9 is provided at one end of the housing 1, and the signal indicator light 9 is arranged in parallel between the static contact 4 and the other end of the fuse 2. The signal indicator light 9 is a light-emitting diode, which has two conductive feet, one conductive foot is connected to the static contact, and the other conductive foot is connected to the second conductive plate. Figure 5 It can be seen that the signal indicator light 9 lights up or does not light up when the moving contact and the static contact are closed to indicate that the fuse has been melted or is working normally. In addition, the signal indicator light is lit when the fuse is normal to indicate that the moving contact and the static contact are in a disconnected state. According to the above structure, it can be seen that the signal indicator light 9 has multiple indication functions, and its specific working principle is as follows:

[0053] The first state is: when the fuse switch is in the normal closing state, that is, the moving and static contacts are in contact, and the signal indicator light 9 is not on at this time, it means that the fuse short-circuits the signal indicator light, so that the current does not pass through the signal indicator light 9, which corresponds to the indication that the fuse 2 is working normally;

[0054] The second state is: when the fuse switch is still in the normal closing state, that is, the moving and static contacts are in contact, the signal indicator light 9 is on at this time, indicating that the current does not pass through the fuse 2, which corresponds to the indication that the fuse 2 has been blown or damaged, so that the signal indicator light is illuminated to achieve the function of blown indication, and the user is reminded to replace the fuse in time;

[0055] The third state is: when the fuse 2 is in normal use, and the signal indicator light 9 is on, it means that the moving and static contacts have been disconnected, thereby disconnecting the current passing through the fuse. At this time, the signal indicator light is used to indicate that the fuse switch is in the open state.

[0056] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the protection scope of the invention.

Claims

1. A fuse switch, It is characterized in that include: A housing (1) in which a melt (2) is installed; A contact mechanism, comprising a moving contact (3) rotatably arranged on the housing (1), and a stationary contact (4) arranged opposite to the moving contact (3), wherein the moving contact (3) is connected to the melt (2); A driving mechanism connected to the contact mechanism for driving the moving contact (3) to contact or separate from the stationary contact (4); the driving mechanism comprises a driving rod (5) movably arranged at one end of the housing (1), and a linkage structure (6) connecting the driving rod (5) and the moving contact (3); the linkage structure (6) reciprocates under the drive of the driving rod (5) and has a first position state for driving the moving contact (3) to rotate and contact with the stationary contact (4), and a second position state for driving the moving contact (3) to rotate and separate from the stationary contact (4); Two plug terminals (7) are installed in two slot openings (11) formed at the other end of the housing (1) and are respectively connected to the contact mechanism and the fuse; The linkage structure (6) comprises an eccentric shaft (61) rotatably arranged on the housing (1), and a first connecting rod (62) connecting the eccentric shaft (61) and the moving contact (3); An elastic component (8) is arranged between the moving contact (3) and the housing. When the moving contact (3) and the stationary contact (4) are in contact, the elastic component (8) is arranged at an angle with the first connecting rod (62), and applies a biasing force to the moving contact (3) to keep in contact with the stationary contact; when the moving contact (3) and the stationary contact (4) are separated, the elastic component (8) is arranged parallel to the first connecting rod (62), and applies a biasing force to the moving contact (3) to move away from the stationary contact.

2. The fuse switch according to claim 1, Features: The linkage structure (6) also includes a second connecting rod (63) connecting the eccentric shaft (61) and the driving rod (5); the first connecting rod (62), the eccentric shaft (61), the second connecting rod (63) and the driving rod (5) are arranged in sequence along the length direction of the housing (1); the eccentric shaft (61) is subjected to force and drives the moving contact (3) to rotate in a direction close to or away from the stationary contact (4) through the first connecting rod (62) during the reciprocating rotation process.

3. The fuse switch according to claim 1, Features: The elastic component (8) is a tension spring structure, and a hook is provided at one end of the moving contact (3) connected to the first connecting rod (62). A fixed shaft (12) located on one side of the eccentric shaft (61) is provided in the housing (1), and the two ends of the tension spring structure are respectively connected to the hook and the fixed shaft (12).

4. The fuse switch according to claim 3, Features: The eccentric shaft (61) comprises an arc-shaped rotating portion (611), and a first boss (612) and a second boss (613) arranged on the side wall of the rotating portion (611); the rotating portion (611) is rotatably connected to the housing (1) via a rotating shaft; the first boss (612) and the second boss (613) are respectively connected to the first connecting rod (62) and the second connecting rod (63).

5. The fuse switch according to claim 4, Features: A limiting structure for limiting the rotational travel of the eccentric shaft (61) is provided between the housing (1) and the eccentric shaft (61), the limiting structure comprising an arc baffle (13) formed in the housing (1), the first boss (612) and the second boss (613) respectively cooperating with two ends of the arc baffle (13) during the rotation of the eccentric shaft (61).

6. The fuse switch according to claim 5, Features: The driving rod (5) can reciprocate along the length direction of the shell (1), one end of the driving rod (5) is an operating end (51) extending out of one end of the shell, and the other end is a driving end (52) facing the eccentric shaft (61), and an inclined extending driving groove (53) is formed on the driving end (52); the second connecting rod (63) and the first connecting rod (62) are respectively U-shaped rod structures, one end of the second connecting rod (63) is slidably inserted into the driving groove (53), and the other end is connected to the connecting hole of the second boss (613).

7. The fuse switch according to any one of claims 1 to 6, Features: The two ends of the fuse (2) are respectively connected to a first conductive plate (21) and a second conductive plate (22); the moving contact (3) is connected to the first conductive plate (21) via a flexible connection; the second conductive plate is connected to one of the plug-in terminals (7); and the stationary contact is connected to the other of the plug-in terminals; an arc extinguishing chamber (30) is provided on one side of the contact port formed by the moving contact (3) and the stationary contact (4).

8. The fuse switch according to claim 7, Features: A signal indicator light (9) is provided at one end of the housing (1), and the signal indicator light (9) is provided in parallel between the static contact (4) and the other end of the fuse (2). When the moving contact and the static contact are closed, the signal indicator light (9) lights up or does not light up to indicate whether the fuse is blown or normal. When the fuse (2) is normal, the signal indicator light (9) lights up to indicate that the moving contact and the static contact are in a disconnected state.

9. The fuse switch according to claim 8, Features: The plug-in terminal (7) is fixed to the slot opening (11) via a mounting structure. The plug-in terminal (7) is a U-shaped structure, comprising a bite portion (71) protruding toward each other by bending side walls on both sides, and a V-shaped port (72) extending from the bite portion (71) to one side of the slot opening (11). The mounting structure comprises two limiting grooves (14) arranged on both sides of the opening of the slot opening (11), and two limiting bosses (15) arranged inside the slot opening (11) in an upper and lower manner. The plug-in terminal (7) is squeezed and inserted between the two limiting bosses (15), and its two ends are respectively abutted against the two limiting grooves (14).

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