Fuse box for circuit switching and electric meter using same

Abstract

The invention discloses a fuse box for circuit switching and an electric meter using the fuse box, the fuse box comprises a support, a fuse and a mounting seat arranged on the support, the fuse is arranged on the mounting seat, the mounting seat comprises a first mounting seat and a second mounting seat, and the first mounting seat and the second mounting seat are arranged on the support. The first mounting seat and the second mounting seat are provided with pins electrically connected with the fuse; clamping feet are arranged on the two sides of the support, and the center lines of the inserting needle and the clamping feet in the width direction do not coincide. The ammeter is provided with a mounting cavity with a top opening, the fuse box is arranged in the mounting cavity, the bottom of the mounting cavity is provided with a jack for accommodating the pin, and the pin is inserted into the jack so as to be electrically connected with a circuit in the ammeter. Compared with the prior art, the fuse box has the advantages that circuit switching can be carried out while the fuse function is achieved, and the occupied space is small.

Description

Technical Field

[0001] The present invention relates to the field of fuse boxes, and in particular to a fuse box for circuit switching and an electric meter using the fuse box. Background Art

[0002] As people's living standards improve, electricity plays an increasingly important role in people's lives. People's lives and work are now inseparable from some electrical equipment. Power outages will cause great trouble to people. In order to solve the above problems, people now generally use dual power circuits and use dual circuit switches to switch the power supply to ensure uninterrupted power supply. However, due to structural reasons, the dual circuit switching device is large in size, high in cost, difficult to operate, and has poor performance.

[0003] Fuses, also known as current fuses, primarily provide overload protection. When a circuit malfunctions or anomalies occur, the current increases, potentially damaging important or valuable components, burning out the circuit, or even causing a fire. If the fuse is properly installed, it will melt when the current reaches a certain level and temperature, shutting off the current and protecting the circuit. However, when used in dual-circuit devices, the switchover requires a converter, and the fuse also requires a fuse box. This takes up considerable space, hindering device miniaturization and increasing costs.

[0004] For example, the Chinese utility model patent application number 202220330940.7 (authorization announcement number CN217062000U) discloses a vehicle-mounted fuse box, a fuse box assembly, and a vehicle. The vehicle-mounted fuse box includes a fuse box upper cover, a fuse box body, and a fuse box lower cover. The upper surface of the fuse box body is provided with a first mounting seat for fixing the fuse. The fuse box body also includes a second mounting seat for fixing the fuse, and the second mounting seat is located on the side and / or below the fuse box body. This utility model fully utilizes the lower space of the fuse box and improves the space utilization rate of the fuse box. However, this utility model cannot realize the function of switching circuits. If a circuit switching device is added, it will take up a large space and the cost will be high. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a fuse box for circuit switching that occupies a small space and is convenient to switch, in response to the above technical status quo.

[0006] The second technical problem to be solved by the present invention is to provide an electric meter using the fuse box in response to the above technical status quo.

[0007] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a fuse box for circuit switching, comprising a support and a mounting base provided on the support, characterized in that:

[0008] Also included is a fuse, the fuse is arranged on a mounting base, the mounting base includes a first mounting base and a second mounting base, the first mounting base and the second mounting base are both provided with a pin electrically connected to the fuse;

[0009] The support is provided with clamping feet on both sides, and the center lines of the insertion pins and the clamping feet in the width direction do not coincide.

[0010] In order to enable the mounting base to be connected to the fuse, preferably, the first mounting base further includes:

[0011] a base, disposed on the support;

[0012] The arm portion has two arms and is spaced apart from each other, and the base portion and the two arms surround each other to form an accommodating space for accommodating the end of the fuse. Generally speaking, the first mounting seat and the second mounting seat have the same structure.

[0013] Preferably, the arm portion is elastic, and the elasticity can enable the arm portion to be expanded outward and retracted inward and automatically reset.

[0014] In order to enable the fuse to be fed into the mounting seat and prevent the fuse from sliding outward after being installed, preferably, each of the arms includes:

[0015] A guide section is provided at the end of each arm, and the front end of the guide section tends to open outward;

[0016] a blocking section, provided at the rear end of the guide section and adapted to cooperate with the annular edge of the fuse;

[0017] The fuse is fed into between the two blocking sections through the two guide sections. When the arm is retracted and automatically reset, the two guide sections prevent the fuse located behind the guide sections from sliding out.

[0018] In order to facilitate the stamping of the mounting seat and at the same time to leave installation space for the pin, preferably, an opening is provided on the arm.

[0019] Preferably, the support is provided with a snap-fitting groove with a side opening, and correspondingly, the mounting seat is provided with a latching tongue that cooperates with the snap-fitting groove.

[0020] The technical solutions adopted by the present invention to solve the above two technical problems are: an electric meter, characterized in that: the aforementioned fuse box is on the electric meter; the electric meter is provided with an installation cavity with a top opening, the fuse box is arranged in the installation cavity, and the bottom of the installation cavity is provided with a socket for accommodating a pin, and the pin is inserted into the socket to electrically connect with the circuit inside the electric meter.

[0021] In order to fix the fuse box on the electric meter, preferably, the clamping foot is provided with a clamping portion protruding outward, and the clamping portion is clamped with the electric meter.

[0022] In order to perform cover opening detection, preferably, the electric meter includes:

[0023] A box body, wherein the installation cavity is provided on the box body;

[0024] A box cover, arranged on the box body;

[0025] The sensor component is arranged in the box body, and the sensor component detects the opening and closing state between the box body and the cover body

[0026] There are multiple ways to realize the cover opening detection. Preferably, the electric meter further includes a PCB board arranged in the box body;

[0027] The bottom surface of the box cover extends downward to form a support column;

[0028] The sensing component includes:

[0029] The swing arm is provided in the box body, and the middle section of the swing arm is provided with a connecting section that is rollingly connected to the box body, so that the swing arm can rotate relative to the box body; the first end of the swing arm is located below the support, and the second end is located below the PCB board;

[0030] A switch is provided on the PCB;

[0031] When the meter box cover is closed, the pillar presses down one end of the swing arm, and the other end of the swing arm rises and hits the switch, thereby connecting the circuit of the PCB board;

[0032] When the meter cover is open, the second end of the swing arm descends and separates from the switch. Only when the cover is in place does the second end of the swing arm rise, connecting the circuit on the PCB (printed circuit board), allowing the meter to operate. When the cover is not in place, the second end of the swing arm separates from the switch, disconnecting the circuit on the PCB and preventing the meter from operating normally.

[0033] Compared with the prior art, the advantages of the present invention are as follows: the fuse is arranged on the mounting base, which includes a first mounting base and a second mounting base, and the first mounting base and the second mounting base are both provided with pins electrically connected to the fuse; therefore, the fuse can be connected to the external circuit through the pins of the first mounting base and the second mounting base; in addition, since the support is provided with clamping feet on both sides, and the center lines of the pins and the width direction of the clamping feet do not coincide; when the fuse box is connected to the external circuit, the direction of the fuse box can be rotated. Under the condition that the device for mounting the fuse box remains unchanged, since the center lines of the pins and the width direction of the clamping feet do not coincide, the positions where the pins are inserted will change before and after the rotation of the fuse box, so that the fuse before and after the rotation can be electrically connected to different circuits, realizing circuit switching. Moreover, since no switch for switching the circuit is provided, the fuse box occupies less space. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the structure of the fuse box of the embodiment;

[0035] Figure 2 1 is an exploded schematic diagram of a fuse box according to an embodiment;

[0036] Figure 3 Schematic diagram of the structure of the electric meter in the embodiment;

[0037] Figure 4 It is a structural diagram of the electric meter of the embodiment (excluding the box cover);

[0038] Figure 5 The figure is a schematic diagram of the structure of the electric meter in the embodiment (excluding the box cover and the fuse box);

[0039] Figure 6 for Figure 5 A magnified view of point A;

[0040] Figure 7 2 is a cross-sectional view of an electric meter according to an embodiment. DETAILED DESCRIPTION

[0041] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0042] like Figure 1-7 Shown is a preferred embodiment of the invention.

[0043] like Figure 1-2 As shown, a fuse box 100 for circuit switching includes a support 1 , a mounting base 2 and a fuse 3 .

[0044] The mounting base 2 is arranged on the support 1 ; the fuse 3 is arranged on the mounting base 2 .

[0045] Mounting base 2 includes a first mounting base 21 and a second mounting base 22. Both mounting bases 21 and 22 are provided with pins 23 electrically connected to fuse 3. Pins 23 are connected to the first and second mounting bases 21 and 22 via connecting sections 231. In this embodiment, the first and second mounting bases 21 and 22 have the same structure. Support 1 is provided with pins 12 on both sides. The pins 23 and the pins 12 do not coincide with their widthwise midlines. First mounting base 21 includes a base 24 and two arms 25. Base 24 is provided on support 1.

[0046] Two arms 25 are spaced apart from each other. The base 24 and the two arms 25 surround a space 2a for accommodating the end of the fuse 3. The arms 25 are elastic, allowing them to expand and retract automatically. An opening is provided in the arm 25 near the pin 23.

[0047] Each arm 25 includes a guide section 251 and a blocking section 252. The guide section 251 is located at the end of each arm 25, with the front end of the guide section 251 tending to flare outward. The blocking section 252 is located at the rear end of the guide section 251 and is configured to engage with the annular edge of the fuse 3. The fuse 3 is fed between the two blocking sections 252 through the two guide sections 251. When the arm 25 retracts and automatically resets, the two guide sections 251 prevent the fuse 3 located behind the guide sections 251 from sliding out. The support 1 is provided with a side-opening engaging slot 11, and the mounting base 2 is correspondingly provided with a latch 26 that engages with the engaging slot 11.

[0048] like Figure 3-7 As shown, this embodiment also provides an electric meter including the aforementioned fuse box 100. The electric meter has a mounting cavity 7 with an open top, and the fuse box 100 is mounted within the mounting cavity 7. The bottom of the mounting cavity 7 is provided with multiple sockets 71 for accommodating pins 23. The pins 23 are inserted into the sockets 71 to electrically connect to the circuitry within the electric meter. The clamping pins 12 are elastic and have an outwardly protruding engaging portion 121 that engages the electric meter. The user can rotate the fuse box 100 to electrically connect the pins 23 of the fuse box 100 to different sockets 71, thereby connecting different circuits and realizing multiple functions on a single electric meter.

[0049] The electric meter includes a housing 4, a cover 5, and a sensor assembly 6. A mounting cavity 7 is provided on the housing 4; a printed circuit board 41 is located within the housing 4. The cover 5 is mounted on the housing 4; its bottom extends downward to form a support 51. The sensor assembly 6 is located within the housing 4 and is used to detect the open / closed state of the housing 4 and the cover 5. In this embodiment, the cover 5 is connected to the housing 4 via bolts.

[0050] like Figure 7As shown, the sensor assembly 6 includes a swing arm 61 and a switch 62. The swing arm 61 is disposed within the housing 4. The middle section of the swing arm 61 is provided with a connecting section that is rollably connected to the housing 4, allowing the swing arm 61 to rotate relative to the housing 4. The first end of the swing arm 61 is located below the support 51, and the second end is located below the PCB 41. When the swing arm 61 is in its natural state, unaffected by external forces, the second end of the swing arm 61 is at a lower level than the first end due to its own weight. The switch 62 is disposed on the PCB 41. The bottom surface of the first end of the swing arm 61 extends downward to form a clamping post 612. Correspondingly, the housing 4 is provided with a top opening for accommodating a guide slot that clamps 612, allowing the swing arm 61 to only swing up and down without causing lateral displacement.

[0051] When the meter box cover 5 is closed, the support 51 presses down one end of the swing arm 61, and the other end of the swing arm 61 rises and hits the switch 62, thereby connecting the circuit of the PCB board 41;

[0052] When the meter box cover 5 is open, the second end of the swing arm 61 drops to separate from the switch 62, so that the circuit of the PCB board 41 is in an unconnected state. Therefore, the meter can only be connected to the circuit and used normally when the box cover 5 is in place, reducing safety hazards.

Claims

1. A fuse box for circuit switching, comprising a support (1) and a mounting base (2) arranged on the support (1), characterized in that: It also includes a fuse (3), the fuse (3) being arranged on the mounting seat (2), the mounting seat (2) comprising a first mounting seat (21) and a second mounting seat (22), the first mounting seat (21) and the second mounting seat (22) both being provided with a plug pin (23) electrically connected to the fuse (3); The support (1) is provided with clamping feet (12) on both sides, and the insertion pin (23) does not coincide with the center line of the clamping feet (12) in the width direction.

2. The fuse box (100) according to claim 1, characterized in that: The first mounting seat (21) further comprises: A base (24) is arranged on the support (1); The arm portions (25) have two arms which are spaced apart from each other, and the base portion (24) and the two arm portions (25) surround and form a receiving space (2a) for receiving the end of the fuse (3).

3. The fuse box according to claim 2, characterized in that: The arm portion (25) has elasticity, and the elasticity can enable the arm portion (25) to be expanded outward and retracted inward to automatically reset.

4. The fuse box according to claim 3, characterized in that: Each of the arms (25) comprises: A guide section (251) is provided at the end of each arm portion (25), and the front end of the guide section (251) tends to open outwards; A blocking section (252) is arranged at the rear end of the guiding section (251) and is used to cooperate with the annular edge of the fuse (3); The fuse (3) is fed into between the two blocking sections (252) through the two guide sections (251). When the arm (25) is retracted and automatically reset, the two guide sections (251) prevent the fuse (3) located behind the guide sections (251) from sliding out.

5. The fuse box according to claim 2, characterized in that: The arm portion (25) is provided with an opening.

6. The fuse box according to claim 1, characterized in that: The support (1) is provided with a clamping groove (11) with a side opening, and correspondingly, the mounting seat (2) is provided with a clamping tongue (26) that cooperates with the clamping groove (11).

7. An electric meter, characterized in that: The electric meter is provided with a fuse box (100) according to any one of claims 1 to 6; the electric meter is provided with an installation cavity (7) with a top opening, the fuse box (100) is arranged in the installation cavity (7), and the bottom of the installation cavity (7) is provided with a socket (71) for accommodating a plug pin (23), and the plug pin (23) is inserted into the socket (71) to be electrically connected to the circuit in the electric meter.

8. The electric meter according to claim 7, characterized in that: The clamping foot (12) is elastic and is provided with a clamping portion (121) protruding outwards, and the clamping portion (121) is clamped with the electric meter.

9. The electric meter according to claim 7, characterized in that: The electric meter comprises: A box body (4), wherein the installation cavity (7) is arranged on the box body (4); A box cover (5) is arranged on the box body (4); The sensor component (6) is arranged in the box body (4), and the sensor component (6) detects the opening and closing state between the box body (4) and the box cover (5).

10. The electric meter according to claim 9, characterized in that: The electric meter also includes a PCB board (41) arranged in the box body (4); The bottom surface of the box cover (5) extends downward to form a support column (51); The sensor assembly (6) comprises: A swing arm (61) is arranged in the box (4); a connecting section (611) is provided in the middle section of the swing arm (61) and is connected to the box (4) in a rolling manner, so that the swing arm (61) can rotate relative to the box (4); a first end of the swing arm (61) is located below the support (51), and a second end is located below the PCB (41); A switch (62) is provided on the PCB (41); When the meter box cover (5) is closed, the support (51) presses down one end of the swing arm (61), and the other end of the swing arm (61) rises and hits the switch (62), thereby connecting the circuit of the PCB board (41); When the meter box cover (5) is in an open state, the second end of the swing arm (61) descends to be separated from the switch (62).

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