Fuse disconnect switch with blown fuse indication

Abstract

The present invention discloses a fuse-type disconnector with a blown fuse indication, comprising a housing, a handle, and a fuse and a contact assembly, wherein the contact assembly comprises a relatively arranged static contact and a moving contact, the moving contact is linked to the handle, and the handle is rotated to drive the moving contact to contact and separate from the static contact to control the on and off of the circuit; an installation space is provided in the housing, and an inlet for a fuse holder is provided at the upper part of the installation space on the housing, and the fuse is installed on the fuse holder; an upper contact piece and a lower contact piece are provided in the housing at the installation space, respectively contacting the upper conductive part and the lower conductive part of the fuse, and also comprising an indicator light, which is mounted in the housing at a position corresponding to the light-transmitting hole on the housing, and two lamp pins of the indicator light are respectively electrically connected to the upper contact piece and the lower contact piece. The fuse-type disconnector in the present invention has a reasonable structure and has a blown fuse indication function, so that it can be known in time after the fuse is blown.

Description

Technical Field

[0001] The invention relates to a fuse type isolating switch with a fuse indication, belonging to the technical field of low-voltage electrical appliances. Background Art

[0002] Most of the existing fuse-type isolating switches on the market have the following problems: (1) They do not have a fuse blowing indication function, that is, the fuse must be removed to know after it blows, and it is impossible to determine whether the fuse is blown without removing the fuse; (2) Generally, the fuse can be taken out regardless of whether the switch is in a closed state or an open state, but there are certain safety hazards when the fuse is taken out while the switch device is in a closed state; (3) A handle is provided on the housing, and the handle is connected to the internal moving contact through a relatively complex transmission mechanism (when disconnecting the circuit, the handle is rotated to drive the moving contact to separate from the static contact through the transmission mechanism; when connecting the circuit, the handle is rotated in the opposite direction to drive the moving contact to contact with the static contact through the transmission mechanism). The transmission mechanism has a large number of components and a relatively complex structure. Summary of the invention

[0003] To this end, the present invention aims to provide a fuse-type disconnect switch with a blown fuse indication.

[0004] The technical solution for achieving the purpose of the present invention is:

[0005] A fuse-type disconnect switch with a blown fuse indication comprises a housing, a handle rotatably mounted on the top of the housing, and a fuse and a contact assembly mounted in the housing, wherein the contact assembly comprises a static contact and a moving contact arranged opposite to each other, the moving contact being linked to the handle, and the handle being rotated to drive the moving contact to contact and separate from the static contact to control the on and off of a circuit; an installation space for inserting a fuse holder is provided in the housing, and a loading port for loading the fuse holder is provided on the housing at the upper part of the installation space, and the fuse is mounted on the fuse holder; an upper contact piece and a lower contact piece respectively contacting the upper conductive part and the lower conductive part of the fuse are fixed in the housing at the installation space, and an indicator light is also included, the indicator light is mounted in the housing at a position corresponding to the light-transmitting hole on the housing, and two lamp pins of the indicator light are respectively electrically connected to the upper contact piece and the lower contact piece.

[0006] In the above technical solution, a clamping plate rotatably connected to the top of the fuse holder is provided in the loading port, and a push plate linked to the handle is provided in the shell. When the handle is rotated, the push plate is driven to move, and a stop portion is provided on the end of the push plate away from the handle. When the handle is in the closed position, the stop portion resists against the fuse holder to confine the fuse holder within the installation space. When the handle is in the disconnected position, the stop portion is moved away to release the limitation on the fuse holder.

[0007] In the above technical solution, a limiting portion is provided on one end of the push plate away from the handle. When the handle is in a closed position, the limiting portion abuts against the card plate to limit the rotation of the card plate. When the handle is in an open position, the limiting portion moves away to release the limitation on the card plate.

[0008] In the above technical solution, the handle is provided with a strip groove, and the push plate is provided with a connecting shaft that cooperates with the strip groove.

[0009] In the above technical solution, the upper end of the fuse bracket has an axis groove, and the clamping plate has a convex shaft that cooperates with the axis groove.

[0010] In the above technical solution, the top end of the moving contact is rotatably connected to the handle, the upper end of a tension spring is connected to the shell, and the lower end is connected to the moving contact. When the handle is rotated to the closed position, the moving contact rotates to contact the static contact under the tension of the tension spring. When the handle is rotated to the disconnected position, the moving contact rotates to separate from the static contact under the tension of the tension spring and abuts against the limiting boss in the shell.

[0011] In the above technical solution, a slot is provided at the upper end of the moving contact, and a shaft connection portion is provided on the handle, and the moving contact and the handle are rotatably connected through the cooperation between the slot and the shaft connection portion.

[0012] In the above technical solution, the housing has a first hanging platform connected to the hook portion of the upper end of the tension spring, and the moving contact has a second hanging platform connected to the hook portion of the lower end of the tension spring.

[0013] The present invention has positive effects: (1) In the present invention, an indicator light is provided, and the indicator light is provided in parallel with the fuse. When the handle is in the closed state, when the fuse is not blown, the fuse short-circuits the indicator light, and the indicator light does not light up. When the fuse is blown, the indicator light lights up to achieve a blown indication effect; (2) When the switch device in the present invention is in use, the fuse can only be removed when it is in the disconnected state, thereby improving safety. Specifically, when the handle is in the closed position, the stopper abuts against the fuse holder to confine the fuse holder within the installation space, thereby preventing the fuse from being removed. When the handle is turned to the disconnected position to put the switch device in the disconnected state, the stopper is removed and does not affect the fuse holder. The push plate can be flipped upwards and the push plate can be pinched to pull out the fuse holder to achieve fuse removal; (3) When the fuse-type isolating switch of the present invention is used, the pressure exerted on the moving contact from different directions by the tension spring during the process of turning the handle causes the moving contact to rotate around the transition point between the moving contact and the handle. When the handle is rotated to the closed position, the moving contact is rotated to contact the static contact under the tension of the tension spring. When the handle is rotated to the disconnected position, the moving contact is rotated to separate from the static contact under the tension of the tension spring and abuts against the limiting boss in the housing. The components constituting the transmission mechanism rely only on the handle and the tension spring, so the number of components is small, the structure is simplified, and assembly is facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the fuse-type isolating switch (the handle is in the closed position) in the present invention;

[0015] Figure 2 It is a structural schematic diagram of the fuse-type isolating switch (the handle is in the disconnected position) in the present invention;

[0016] Figure 3 It is a structural schematic diagram of the fuse in the present invention;

[0017] Figure 4 Schematic diagram of the structure of the upper contact sheet / lower contact sheet in the present invention;

[0018] Figure 5 for Figure 1 Exploded view of a fuse-type disconnect switch shown.

[0019] The reference numerals shown in the figure are: 1-shell; 100-light-transmitting hole; 11-installation space; 12-loading entrance; 13-clamping plate; 131-convex shaft; 14-push plate; 141-stop part; 142-limiting part; 143-connecting shaft; 15-limiting boss; 16-first hanging platform; 2-handle; 21-strip groove; 22-axial connection part; 3-fuse; 31-upper end conductive part; 32-lower end conductive part; 4-static contact; 5-moving contact; 51-clamping slot; 52-second hanging platform; 6-fuse bracket; 61-axial slot; 7-upper contact piece; 8-lower contact piece; 9-indicator light; 10-tension spring;. DETAILED DESCRIPTION

[0020] The specific structure of the present invention is described below in conjunction with the accompanying drawings:

[0021] A fuse-type disconnect switch with a blown fuse indication, such as Figures 1 to 5 As shown, it comprises a housing, a handle 2 rotatably mounted on the top of the housing 1, and a fuse 3 and a contact assembly mounted in the housing 1, wherein the contact assembly comprises a stationary contact 4 and a moving contact 5 arranged opposite to each other, wherein the moving contact 5 is linked to the handle 2, and the moving contact 5 is driven to contact and separate with the stationary contact 4 by the rotation of the handle 2 to control the circuit to be turned on and off; an installation space 11 for inserting a fuse holder 6 is provided in the housing 1, and a mounting hole 11 is provided on the housing 1 at the upper part of the installation space 11 for the fuse holder 6 to be turned on and off. The fuse holder 6 is installed in the loading port 12, and the fuse 3 is installed on the fuse holder 6; the housing 1 is fixed with an upper contact piece 7 and a lower contact piece 8 that are respectively in contact with the upper conductive part 31 and the lower conductive part 32 of the fuse 3 to achieve electrical connection at the installation space 11, and also includes an indicator light 9, which is clamped in the housing 1 at a position corresponding to the light-transmitting hole 100 on the housing 1, and the two lamp pins of the indicator light 9 are respectively electrically connected to the upper contact piece 7 and the lower contact piece 8. In this embodiment, the indicator light 9 is set in the above manner, and the indicator light 9 is set in parallel with the fuse 3. When the handle 2 is closed, when the fuse 3 is not blown, the fuse 3 short-circuits the indicator light 9, and the indicator light 9 does not emit light. When the fuse 3 is blown, the indicator light 9 emits light to achieve the function of blown indication. In actual assembly, one of the upper contact piece 7 and the lower contact piece 8 is connected to an external wiring terminal, and the other is connected to the moving contact 5, so that the fuse 3 is connected in series in the circuit.

[0022] As a further improvement of the above embodiment, see Figure 1 and Figure 2As shown, in this embodiment, a clamping plate 13 rotatably connected to the top of the fuse holder 6 is provided in the loading port 12, and a push plate 14 linked to the handle 2 is provided in the housing 1. When the handle 2 rotates, the push plate 14 is driven to move, and a stop portion 141 is provided on the end of the push plate 14 away from the handle 2. When the handle 2 is in the closed position, the stop portion 141 resists against the fuse holder 6 to confine the fuse holder 6 in the installation space 11. When the handle 2 is in the disconnected position, the stop portion 141 is moved away to release the confinement of the fuse holder 6. When the switch device in this embodiment is in use, the fuse 3 can be removed only when it is in the disconnected state, thereby improving safety. Specifically, when the handle 2 is in the closed position, the stopper 141 abuts against the fuse holder 6 to confine the fuse holder 6 within the installation space 11, thereby preventing the fuse 3 from being removed. When the handle 2 is rotated to the disconnected position to put the switch device in the disconnected state, the stopper 141 is moved away and does not limit the fuse holder 6. At this time, the fuse holder 6 can be pulled out by flipping the push plate 14 upwards and pinching the push plate 14 to achieve removal of the fuse 3.

[0023] Furthermore, the push plate 14 has a limiting portion 142 at one end away from the handle 2. When the handle 2 is in the closed position, the limiting portion 142 abuts against the clamping plate 13 to limit the rotation of the clamping plate 13. When the handle 2 is in the open position, the limiting portion 142 moves away to release the limitation on the clamping plate 13. With this structure, when the switch device is in the closed position, the limiting portion 142 abuts against the clamping plate 13 to limit the clamping plate 13, so that the clamping plate 13 cannot be turned upward in this state.

[0024] In this embodiment, the handle 2 has a strip groove 21, and the push plate 14 has a connecting shaft 143 that cooperates with the strip groove 21. The handle 2 and the push plate 14 are linked together by the cooperation of the connecting shaft 143 and the strip groove 21. When the handle 2 rotates, the push plate 14 is driven to move, and the connecting shaft 143 moves relatively in the strip groove 21.

[0025] In this embodiment, the upper end of the fuse holder 6 has an axis groove 61, and the clamping plate 13 has a convex shaft 131 that cooperates with the axis groove 61, that is, the rotatable connection between the clamping plate 13 and the fuse holder 6 is achieved through the cooperation between the axis groove 61 and the convex shaft 131.

[0026] In this embodiment, the top end of the moving contact 5 is rotatably connected to the handle 2, the upper end of a tension spring 10 is connected to the housing 1, and the lower end is connected to the moving contact 5. When the handle 2 is rotated to the closed position, the moving contact 5 is rotated to contact the static contact 4 under the tension of the tension spring 10. When the handle 2 is rotated to the disconnected position, the moving contact 5 is rotated to separate from the static contact 4 under the tension of the tension spring 10, and abuts against the limiting boss 15 in the housing 1. With the above structure, when in use, the moving contact 5 is rotated around the transition point between the moving contact 5 and the handle 2 by applying pressure to the moving contact 5 from different directions through the tension spring 10 during the process of rotating the handle 2. When the handle 2 is rotated to the closed position, the moving contact 5 is rotated to contact the static contact 4 under the tension of the tension spring 10. When the handle 2 is rotated to the disconnected position, the moving contact 5 is rotated to separate from the static contact 4 under the tension of the tension spring 10 and abuts against the limiting boss 15 in the housing 1. The components constituting the transmission mechanism rely only on the handle 2 and the tension spring 10, so the number of components is small, the structure is simplified, and assembly is facilitated.

[0027] In this embodiment, a slot 51 is provided at the upper end of the moving contact 5, and an axial connection portion 22 is provided on the handle 2. The slot 51 cooperates with the axial connection portion 22 to realize the rotatable connection between the moving contact 5 and the handle 2. The slot 51 cooperates with the axial connection portion 22 to realize the rotatable connection between the moving contact 5 and the handle 2. The above structure is adopted to facilitate connection and assembly.

[0028] In this embodiment, the housing 1 has a first hanging platform 16 connected to the upper hook of the tension spring 10 , and the moving contact 5 has a second hanging platform 52 connected to the lower hook of the tension spring 10 .

[0029] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. 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. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A fuse-type disconnect switch with a blown fuse indication, comprising a housing (1), a handle (2) rotatably mounted on the top of the housing (1), and a fuse (3) and a contact assembly mounted in the housing (1), wherein the contact assembly comprises a stationary contact (4) and a moving contact (5) arranged opposite to each other, the moving contact (5) being linked to the handle (2), and the moving contact (5) being brought into contact with and separated from the stationary contact (4) by the rotation of the handle (2) to control the conduction and disconnection of a circuit; a mounting for inserting a fuse holder (6) is provided in the housing (1) The housing (1) is provided with an insertion opening (12) for inserting the fuse holder (6) at the upper part of the installation space (11); the fuse (3) is installed on the fuse holder (6); a clamping plate (13) rotatably connected to the top of the fuse holder (6) is provided in the insertion opening (12); an upper contact piece (7) and a lower contact piece (8) are fixed in the installation space (11) in the housing (1) and are in contact with the upper conductive part (31) and the lower conductive part (32) of the fuse (3), respectively, and are characterized in that: The device also comprises an indicator light (9), the indicator light (9) being mounted in the housing (1) at a position corresponding to the light-transmitting hole (100) on the housing (1), and the two lamp pins of the indicator light (9) being electrically connected to the upper contact piece (7) and the lower contact piece (8) respectively; the top end of the movable contact (5) is rotatably connected to the handle (2); the upper end of a tension spring (10) is connected to the housing (1), and the lower end is connected to the movable contact (5); when the handle (2) is rotated to a closed position, the movable contact (5) is rotated to contact the stationary contact (4) under the tension of the tension spring (10); when the handle (2) is rotated to an open position, the movable contact (5) is rotated to separate from the stationary contact (4) under the tension of the tension spring (10) and abuts against a limiting boss (15) in the housing (1).

2. The fuse-type disconnector with blown fuse indication according to claim 1, characterized in that: A push plate (14) linked to the handle (2) is arranged in the housing (1); when the handle (2) rotates, the push plate (14) is driven to move; an end of the push plate (14) away from the handle (2) has a stop portion (141); when the handle (2) is in a closed position, the stop portion (141) abuts against the fuse holder (6) to confine the fuse holder (6) within the installation space (11); when the handle (2) is in an open position, the stop portion (141) moves away to release the confinement of the fuse holder (6).

3. The fuse-type disconnector with blown fuse indication according to claim 2, characterized in that: The push plate (14) has a limiting portion (142) at one end away from the handle (2); when the handle (2) is in a closed position, the limiting portion (142) abuts against the clamping plate (13) to limit the rotation of the clamping plate (13); when the handle (2) is in an open position, the limiting portion (142) moves away to release the limitation on the clamping plate (13).

4. The fuse-type disconnector with a blown fuse indication according to claim 2 or 3, characterized in that: The handle (2) is provided with a strip groove (21), and the push plate (14) is provided with a connecting shaft (143) that matches the strip groove (21).

5. The fuse-type disconnector with blown fuse indication according to claim 2 or 3, characterized in that: The upper end of the fuse bracket (6) is provided with an axis groove (61), and the clamping plate (13) is provided with a convex shaft (131) that matches the axis groove (61).

6. The fuse-type disconnector according to claim 1, characterized in that: A slot (51) is provided at the upper end of the moving contact (5), and a shaft connection portion (22) is provided on the handle (2); the moving contact (5) and the handle (2) are rotatably connected by the cooperation of the slot (51) and the shaft connection portion (22).

7. The fuse-type disconnector according to claim 1, characterized in that: The housing (1) has a first hanging platform (16) which is hung on the hook portion of the upper end of the tension spring (10), and the moving contact (5) has a second hanging platform (52) which is hung on the hook portion of the lower end of the tension spring (10).

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