Current protector

Abstract

The utility model belongs to the technical field of over-current protection, and discloses a current protector, which specifically comprises an integrated circuit board and an outer casing, the integrated circuit board comprises a PCB (printed circuit board) and a fuse assembly, the fuse assembly is printed on the PCB, and two end parts of the fuse assembly are fixedly connected with fuse signal lines; the outer housing is of a columnar structure with orifices at two ends, the outer housing is detachably sleeved on the integrated circuit board, and the fuse signal line is led out through the orifices; according to the current protector, the integrated circuit board with the effect equivalent to that of a glass fuse is adopted to replace a traditional glass fuse, meanwhile, the fuse signal lines are welded to the two ends of the fuse assembly, the problem that the traditional glass fuse is prone to being broken is solved, the reliability of fuse line connection is improved, and remarkable advantages are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of overcurrent protection, especially relates to a current protector. BACKGROUND

[0002] At present, the protector used in communication equipment is generally a glass fuse, which is connected to the signal line through the metal copper sheet at both ends fixed in the plastic shell, and when the current exceeds the set range, the fuse is burnt out, thereby playing a current protection role, and the equipment and other devices are not burnt out, and the life and property safety are not affected by fire or electric shock.

[0003] The deficiencies of the traditional fuse include:

[0004] 1) The glass fuse used as a signal protector is generally connected in series with the signal line, and there are many signal lines in each device, so that the lines are easily broken due to stress and other factors during the assembly process.

[0005] 2) Some devices need to be transported to various places, and the glass fuse is easily broken due to vibration and falling during transportation.

[0006] 3) The two ends of the glass fuse are in contact with the spring, which is easy to cause poor contact and oxidation at both ends, resulting in signal interruption.

[0007] Based on the above analysis, the application designs a current protector with a novel structure. CONTENT OF THE UTILITY MODEL

[0008] The utility model aims at providing a current protector, which adopts an integrated circuit board with equivalent glass fuse effect to replace the traditional glass fuse, and the fuse signal line is welded at both ends of the fuse assembly, thereby solving the problem of easy breakage of the traditional glass fuse and improving the reliability of the fuse line connection.

[0009] In order to solve the above problems, the present application provides a current protector, which comprises an integrated circuit board and an outer shell, the integrated circuit board comprises a PCB board and a fuse assembly, the fuse assembly is printed on the PCB board, and the both ends of the fuse assembly are fixedly connected with a fuse signal line; the outer shell is a columnar structure with holes at both ends, the outer shell is detachably sleeved on the integrated circuit board, and the fuse signal line is led out through the holes.

[0010] As a preferred embodiment of this application: the fuse assembly is only a copper foil wire, or a combination of a copper foil wire and a resettable fuse. When the fuse assembly is only a copper foil wire, the copper foil wire is printed on the PCB board along the length direction of the PCB board in any of the following routing forms: "S", "U", or "I". When it is a combination of a copper foil wire and a resettable fuse, the two contacts of the resettable fuse are respectively connected to the copper foil wire and then extend along the length direction of the PCB board, and the width of the copper foil wire at the front end of the resettable fuse is greater than the width of the copper foil wire at the rear end.

[0011] As a preferred embodiment of this application, the self-resetting fuse is disposed at the end of the PCB board closer to the load.

[0012] As a preferred embodiment of this application: the outer casing includes a box body and a cover body, the box body and the cover body are connected in an openable and closable manner by a connector, and the opening is provided at the end of at least one of the box body and the cover body.

[0013] As a preferred embodiment of this application: the inner cavity of the box is provided with a PCB board fixing component, which is at least one of a limiting groove, a buckle, a threaded groove, or a magnetic block adapted to the size of the PCB board. When the PCB board fixing component is a threaded groove or a magnetic block, the PCB board is provided with threaded holes and metal parts corresponding to the threaded groove and the magnetic block.

[0014] As a preferred embodiment of this application, the outer casing is made of insulating and flame-retardant material.

[0015] As a preferred embodiment of this application, the diameter of the orifice is adapted to the diameter of the fuse signal line, and a sealing gasket is provided at the orifice.

[0016] As a preferred embodiment of this application, the fuse signal line is fixed to both ends of the fuse assembly by welding or binding.

[0017] As a preferred embodiment of this application: conductive posts are connected to both ends of the fuse assembly, and the fuse signal line is soldered onto the conductive posts.

[0018] Compared with existing technologies, the advantages of this application are:

[0019] (1) An integrated circuit board with the equivalent effect of a glass fuse is used to replace the traditional glass fuse, which solves the problem of the easy breakage of the traditional glass fuse.

[0020] (2) The fuse signal wire is fixed to both ends of the fuse assembly by means of welding, which improves the reliability of signal transmission. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the main structure of the transmitter provided by this utility model.

[0022] Figure 2 This is an exploded structural diagram of the transmitter provided by this utility model.

[0023] Figure 3 This is a side view of the outer casing provided by this utility model.

[0024] Figure 4 A cross-sectional structural diagram of the outer casing provided by this utility model.

[0025] Figure 5 A schematic diagram of the layout structure of another fuse assembly provided by this utility model on a PCB board.

[0026] Figure 6 This is a schematic diagram of the layout structure of another fuse assembly on a PCB board provided by this utility model.

[0027] Figure Labels

[0028] 10 is an integrated circuit board; 101 is a PCB board; 102 is a copper foil wire; 103 is a resettable fuse; 104 is a conductive post; 20 is an outer casing; 201 is a housing; 202 is a cover; 203 is an opening; 204 is a PCB board fixing component; 205 is a sealing gasket; 206 is a connector; 30 is a fuse signal line. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present invention.

[0030] This embodiment provides a current protector, such as Figures 1-2 As shown, the system includes an integrated circuit board 10 and an outer casing 20. The integrated circuit board 10 includes a PCB board 101 and a fuse assembly. The PCB board 101 has a rectangular structure, and the fuse assembly is printed on the PCB board 101. At the same time, fuse signal lines 30 are fixedly connected to both ends of the fuse assembly. That is, the fuse signal lines 30 are fixedly connected to both ends of the fuse assembly. Specifically, the fixing method can be welding or binding. In this embodiment, it is preferred that the two ends of the fuse assembly are connected to conductive posts 104, and the fuse signal lines 30 are welded to the conductive posts 104. The outer casing 20 is a columnar structure with holes 203 at both ends. It is understood that the outer casing 20 should be adapted to the integrated circuit board 10. The outer casing 20 is detachably sleeved on the integrated circuit board 10, and the fuse signal lines 30 are led out through the holes 203 for connection with external circuits.

[0031] As a preferred embodiment, the fuse assembly is simply the copper foil wire 102, or a combination of the copper foil wire 102 and the resettable fuse 103 (PTC).

[0032] When the fuse assembly consists only of copper foil trace 102, the copper foil trace 102 is printed on the PCB board 101 along the length of the PCB board 101 in any of the following routing forms: "S", "U", or "I" (i.e., single-segment trace). See [reference needed]. Figure 2 or Figure 5 As is well known, the trace width determines the current carrying capacity, the trace length affects the resistance and fusing speed, the shape (serpentine / spiral) increases the resistance and controls the fusing point, and the number of turns adjusts the total resistance and heat dissipation conditions. Therefore, it is understandable that the number of turns and shape of the copper foil wire 102 can be selected according to the actual application environment to ensure reliable fusing during overcurrent and without affecting the current carrying capacity during normal operation. For example, a single-segment trace is suitable for low-current, low-voltage scenarios, while S-shaped or serpentine traces with multiple bends are suitable for higher current scenarios.

[0033] When it is a combination of copper foil wire 102 and resettable fuse 103 (PTC), see Figure 6 As shown, the two contacts of the resettable fuse 103 are connected to copper foil lines 102 and extend along the length of the PCB board 101. The width of the copper foil lines 102 at the front end of the resettable fuse 103 is greater than the width of the copper foil lines 102 at the rear end. This avoids the phenomenon that a large current will melt the copper foil lines at the front end of the resettable fuse 103 first, ensuring the normal and cyclical use of the integrated circuit board 10 with this structure. It is understood that the width of the front end of the resettable fuse 103 should be greater than the width required for the rated current of the resettable fuse 103. In this embodiment, the model of the resettable fuse 103 can be selected according to actual needs. The specific model used in this embodiment is SL0805175. This model of resettable fuse 103 includes SMD surface mount resettable fuses and R-type through-hole resettable fuses. In this embodiment, R-type through-hole resettable fuses are preferred.

[0034] The self-resetting fuse 103 is located at the end of the PCB board 101 closest to the load, which improves the reliability of load protection.

[0035] As a preferred scheme of the embodiment, the outer shell 20 comprises a box body 201 and a cover body 202, and it can be understood that the cavity formed by the box body 201 and the cover body 202 can only ensure that the integrated circuit board 10 can be accommodated therein, the box body 201 and the cover body 202 are connected in an openable and closable manner through a connecting piece 206 such as a buckle or a lock, and an orifice 203 is arranged at an end of at least one of the box body 201 and the cover body 202, and a semicircular opening is preferably arranged on the abutting surface of the box body 201 and the cover body 202 respectively in the embodiment, and the two semicircular openings form a circular orifice 203 capable of accommodating the fuse signal line 30 after abutting.

[0036] As a preferred scheme of the embodiment, a PCB plate fixing piece 204 is arranged in the inner cavity of the box body 201, the PCB plate fixing piece 204 is used for fixing the PCB plate 101 in the outer shell 20, improving the stability of the integrated circuit board 10 in the outer shell 20, and avoiding shaking and other factors affecting the reliability of the circuit; the PCB plate fixing piece 204 is at least one of a limiting groove, a buckle, a threaded embedding groove or a magnetic block which is suitable in size for the PCB plate 101, when the PCB plate fixing piece 204 is a threaded embedding groove or a magnetic block, a threaded hole and a metal piece corresponding to the threaded embedding groove and the magnetic block are arranged on the PCB plate 101; and the PCB plate fixing piece 204 is preferably a buckle in the embodiment, the buckle can be clamped with the outer edge of the PCB plate 101, and it can be understood that a buffer pad can also be arranged in the inner cavity of one of the box body 201 and the cover body 202 when necessary to support the integrated circuit board 10.

[0037] As a preferred scheme of the embodiment, the aperture of the orifice 203 is suitable for the wire diameter of the fuse signal line 30, and a sealing washer 205 is arranged at the orifice 203, by arranging the sealing washer, on the one hand, the inside of the current protector is sealed, and on the other hand, the stability of the integrated circuit board 10 is improved.

[0038] As a preferred scheme of the embodiment, the outer shell 20 is made of an insulating and flame-retardant material, improving the safety in use, and specifically, the outer shell 20 can be made of at least one of ABS or EP materials, and the outer shell 20 is formed in an injection molding manner, and in the embodiment, when the PCB plate fixing piece 204 is a limiting groove, a buckle or a threaded embedding groove, the PCB plate fixing piece 204 can be integrally injection molded with the outer shell 20.

[0039] It should be noted that in the embodiment, the integrated circuit board 10 and the outer shell 20 are both mass-produced, and the model, type, number of wiring loops and the like of the fuse assembly on the integrated circuit board 10 can all contain multiple types, that is, the integrated circuit board 10 contains multiple models in order to adapt to different protection circuits.

[0040] In the assembly, the outer shell 20 is opened and sleeved on the integrated circuit board 10, and the fuse signal line 30 is ensured to pass through the hole 203 and the integrated circuit board 10 is fixed on the PCB fixing member, and then the cover 202 of the outer shell 20 is closed and locked with the box body 201.

[0041] In use, the current protector is connected to the corresponding protection circuit through the fuse signal line 30, and when the overcurrent phenomenon occurs, the fuse assembly is fused in advance to protect the load and the circuit.

[0042] As can be seen from the above, the current protector of the embodiment uses the integrated circuit board 10 with the equivalent effect of the glass fuse to replace the traditional glass fuse, and the fuse signal line 30 is welded at both ends of the fuse assembly, which solves the problem that the traditional glass fuse is easy to break and improves the reliability of the fuse line connection, and has significant advantages.

[0043] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme and other common knowledge are not described in detail. It should be pointed out that for those skilled in the art, without departing from the present application, a number of improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of the claims, and the specific implementation mode and other records in the specification can be used to explain the content of the claims.

Claims

1. A current protector, characterized in that: The device includes an integrated circuit board and an outer casing. The integrated circuit board contains a PCB board and a fuse assembly. The fuse assembly is printed on the PCB board, and fuse signal lines are fixedly connected to both ends of the fuse assembly. The outer casing is a columnar structure with holes at both ends. The outer casing is detachably fitted onto the integrated circuit board, and the fuse signal lines are led out through the holes.

2. The current protector according to claim 1, characterized in that: The fuse assembly consists only of copper foil wires, or a combination of copper foil wires and a resettable fuse. When the fuse assembly consists only of copper foil wires, the copper foil wires are printed on the PCB board along the length of the PCB board in any of the following routing patterns: "S", "U", or "I". When it is a combination of copper foil wires and a resettable fuse, the two contacts of the resettable fuse are connected to the copper foil wires and then extend along the length of the PCB board, and the width of the copper foil wire at the front end of the resettable fuse is greater than the width of the copper foil wire at the rear end.

3. The current protector according to claim 2, characterized in that: The resettable fuse is located at the end of the PCB board closest to the load.

4. The current protector according to claim 1, characterized in that: The outer casing includes a box body and a cover body, which are connected in an openable manner by a connector, and the opening is provided at the end of at least one of the box body and the cover body.

5. The current protector according to claim 4, characterized in that: The inner cavity of the box is provided with a PCB board fixing component. The PCB board fixing component is at least one of the following: a limiting groove, a buckle, a threaded groove, or a magnetic block that is adapted to the size of the PCB board. When the PCB board fixing component is a threaded groove or a magnetic block, the PCB board is provided with threaded holes and metal parts corresponding to the threaded groove and the magnetic block.

6. The current protector according to claim 1, characterized in that: The outer casing is made of insulating and flame-retardant material.

7. The current protector according to claim 1, characterized in that: The diameter of the orifice is adapted to the diameter of the fuse signal line, and a sealing gasket is provided at the orifice.

8. The current protector according to claim 1, characterized in that: The fuse signal wire is fixed to both ends of the fuse assembly by welding or binding.

9. The current protector according to claim 8, characterized in that: The fuse assembly has conductive posts connected to both ends, and the fuse signal line is soldered to the conductive posts.

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