Wire harness safety device

Abstract

The utility model provides a wire harness safety device, which comprises a fuse, a plurality of connecting terminals and a plurality of contact elastic sheets, wherein the plurality of connecting terminals are used for being connected with external wires, the connecting terminals are sleeved on the outer side of the fuse, and gaps are arranged between the connecting terminals and the fuse; the contact elastic sheet is arranged in a gap between the fuse and the connecting terminal, the connecting terminal is electrically conducted with the fuse through the contact elastic sheet, and the end part of the fuse is clamped in the contact elastic sheet. The low-voltage wiring harness solves the problem of poor safety of the low-voltage wiring harness in the prior art.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage wire harnesses, in particular to a wire harness safety device. Background Art

[0002] As a carrier of communication, low-voltage wiring harnesses are densely distributed inside modules or PACKs (packaging). As the charging rate gradually increases, the charging current of the battery cells becomes larger and larger, and the risk of thermal runaway is also gradually increasing. Traditional low-voltage sampling harnesses generally connect the wires directly. Since this method cannot cut off the circuit in time, it has a high risk of thermal runaway, resulting in problems with its safety. It is precisely because of this problem that traditional low-voltage sampling harnesses have been gradually replaced by components such as electronic control boards. It can be seen that the traditional low-voltage wiring harness has poor safety, which makes it unable to adapt to the current working conditions of module sampling. Utility Model Content

[0003] The main purpose of the utility model is to provide a wire harness safety device to solve the problem of poor safety of low-voltage wire harnesses in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to the utility model, a wiring harness safety device is provided, including a fuse, a plurality of connection terminals for connecting to external wires, and a plurality of contact springs, the connection terminals are sleeved on the outside of the fuse and are arranged in a gap with the fuse; the contact springs are arranged in the gap between the fuse and the connection terminals, the connection terminals are electrically connected to the fuse through the contact springs, and the ends of the fuse are clamped in the contact springs.

[0005] Furthermore, the contact spring includes a plurality of elastic arms, the elastic arms are located in the gap between the fuse and the connecting terminal, the elastic arms are arranged along the circumference of the fuse and form a receiving area, and the fuse is located in the receiving area.

[0006] Furthermore, the elastic arm is in a broken line or curved line shape, a part of the elastic arm protrudes toward the fuse and forms a protrusion, and when the fuse is located in the contact spring sheet, the protrusion contacts and conducts with the fuse.

[0007] Furthermore, there are multiple protrusions, and at least two protrusions are formed on each elastic arm. When the fuse is located in the contact spring sheet, at least two protrusions on the elastic arm are in contact with the fuse.

[0008] Furthermore, the contact spring also includes a ring body, the ends of the elastic arms are connected to the ring body and extend along the axial direction of the ring body, and the elastic arms are arranged at intervals along the circumference of the ring body.

[0009] Furthermore, the connecting terminal includes a small diameter section, a transition section and a large diameter section which are connected axially in sequence. The large diameter section is sleeved on the outside of the fuse and contacts the contact spring. The external wire passes through the small diameter section and contacts and conducts with the small diameter section.

[0010] Furthermore, the connecting terminal further comprises an observation hole, which is located at the side wall of the small diameter section and / or the transition section and is communicated with the inner cavity of the connecting terminal.

[0011] Furthermore, the connecting terminal further comprises a terminal punching seam, and the terminal punching seam radially penetrates both inner and outer sides of the connecting terminal and penetrates both axial ends of the connecting terminal.

[0012] Furthermore, the wiring harness safety device also includes a shell, which is an insulating shell. The shell is sleeved on the outside of the fuse and the connecting terminal and shields the fuse and at least part of the connecting terminal. The end of the shell is provided with a wire hole for the external wire to pass through.

[0013] Furthermore, the fuse includes a fuse body and a plurality of conductive caps, wherein the conductive caps are located at the ends of the fuse body, and when the fuse is located in the contact spring sheet, the contact spring sheet is in contact with the conductive caps and is conductive.

[0014] By applying the technical solution of the utility model, the fuse is introduced into the use environment of the low-voltage wiring harness, so that it plays the role of a fuse and reduces the risk of thermal runaway of the low-voltage wiring harness. The fuse is electrically connected to the connection terminal placed on the outside of the fuse through the contact spring, and the contact spring contacts the fuse and the connection terminal to generate tension, so that the outside is stably connected to the connection terminal, and the inside is stably connected to the fuse, so that the fuse and the connection terminal can be stably connected. In this way, at one end of the fuse, the connection terminal transmits an electrical signal to the fuse through the contact spring, and the two ends of the fuse are symmetrically arranged. Similarly, the other end of the fuse transmits an electrical signal to the connection terminal, so that the fuse can be introduced into the circuit. On the one hand, when the passing electrical signal is too large, the fuse can cut off the circuit in time to prevent thermal runaway. On the other hand, under normal working conditions, the fuse conducts the circuit, which is equivalent to a wire and plays the role of transmitting electrical signals. The other end of the connection terminal is connected to the external wire, so that the wiring harness safety device is connected to the circuit, solving the pain point that the low-voltage wiring harness has no fuse. At the same time, the detachable structure of the wiring harness safety device makes maintenance more convenient and quick when a fuse fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 An exploded view of the wiring harness safety device of the utility model is shown;

[0017] Figure 2 A schematic diagram of the structure of a wiring harness safety device is shown;

[0018] Figure 3 A longitudinal cross-sectional view of a wiring harness safety device is shown;

[0019] Figure 4 shows a schematic structural diagram of a connecting terminal;

[0020] Figure 5 A schematic diagram of the structure of a fuse is shown;

[0021] Figure 6 A schematic diagram of the structure of the contact spring is shown;

[0022] Figure 7 A schematic structural diagram of a connecting terminal with a punched seam is shown.

[0023] The above drawings include the following reference numerals:

[0024] 10. Fuse; 11. Fuse body; 12. Conductive cap; 20. Connecting terminal; 21. Small diameter section; 22. Transition section; 23. Large diameter section; 24. Observation hole; 25. Stamping seam; 30. Contact spring; 31. Elastic arm; 311. Protrusion; 32. Ring body; 40. Shell; 50. External wire. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0027] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0028] In order to solve the problem of poor safety of low-voltage wire harnesses in the prior art, the utility model provides a wire harness safety device.

[0029] like Figures 1 to 7A wiring harness safety device shown in the figure includes a fuse 10, a plurality of connection terminals 20 for connecting to an external wire 50, and a plurality of contact springs 30. The connection terminals 20 are sleeved on the outside of the fuse 10 and are arranged in a gap with the fuse 10; the contact springs 30 are arranged in the gap between the fuse 10 and the connection terminals 20, the connection terminals 20 are electrically connected to the fuse 10 through the contact springs 30, and the ends of the fuse 10 are clamped in the contact springs 30.

[0030] This embodiment introduces the fuse 10 into the low-voltage wiring harness use environment to function as a fuse, thereby reducing the risk of thermal runaway of the low-voltage wiring harness. Specifically, by arranging the contact spring 30 between the fuse 10 and the connection terminal 20, the outer side of the contact spring 30 is stably connected to the connection terminal 20, and the inner side is stably connected to the fuse 10, so that the fuse 10 and the connection terminal 20 can be stably connected. In this way, at one end of the fuse 10, the connection terminal 20 at this end realizes the transmission of electrical signals with the fuse 10 through the contact spring 30. Similarly, at the other end of the fuse 10, the connection terminal 20 at this end also realizes the transmission of electrical signals with the fuse 10 through the contact spring 30. In this way, electrical conduction between the connection terminals 20 at both ends can be achieved, and then electrical conduction between the two sections of external wires 50 can be achieved through the fuse 10, achieving the effect of introducing the fuse 10 into the low-voltage wiring harness use environment. In the above-mentioned setting, under normal working conditions, the fuse 10 conducts the circuit, which is equivalent to a wire and plays the role of transmitting electrical signals. When the passing electrical signal is too large, the fuse 10 promptly cuts off the circuit to prevent thermal runaway, thereby ensuring the safety of the low-voltage wiring harness, realizing the function of adding a fuse to the low-voltage wiring harness, improving the safety of the use of the low-voltage wiring harness, and adapting to the current working conditions of module sampling. Moreover, since the contact spring 30 and the fuse 10 are in a card-set matching mode, the installation and removal of the fuse 10 only requires inserting or pulling out from the contact spring 30. The entire disassembly and assembly process is convenient and quick, and the replacement of the fuse 10 and the maintenance of other components can be easily performed, and the volume is smaller.

[0031] like Figure 1 As shown, it should be noted that, for the convenience of processing and use, the wiring harness safety device of this embodiment is symmetrically arranged as a whole, that is, two connecting terminals 20 are arranged, and one connecting terminal 20 is arranged at both ends of the fuse 10. Similarly, there are two contact springs 30, which are respectively matched with the two connecting terminals 20 and the two ends of the fuse 10. Of course, the wiring harness safety device may not be arranged in a symmetrical structure.

[0032] like Figure 6As shown, the contact spring 30 in this embodiment includes a plurality of elastic arms 31, and the elastic arms 31 are located in the gap between the fuse 10 and the connecting terminal 20. Since the gap formed between the fuse 10 and the connecting terminal 20 is annular, the plurality of elastic arms 31 in this embodiment also form an annular shape, that is, each elastic arm 31 is arranged along the circumference of the fuse 10. In this way, a receiving area is formed inside the elastic arm 31, and the receiving area is similar to a cylinder. When the fuse 10 is installed and clamped in the receiving area, when the fuse 10 is axially inserted into the receiving area, since the diameter of the fuse 10 is slightly larger than the diameter of the receiving area surrounded by the elastic arms 31 in the free state, the fuse 10 squeezes the elastic arms 31 and expands the elastic arms 31 outward, thereby expanding the receiving area. On the one hand, the fuse 10 can be clamped in the receiving area to achieve stable installation of the fuse 10. On the other hand, the expansion of the elastic arms 31 causes the outer surface of the elastic arms 31 to squeeze the connecting terminal 20, thereby making the contact between the elastic arms 31 and the connecting terminal 20 more stable. Through the above arrangement, not only the fuse 10 and the connection terminal 20 are connected, the transmission of the electrical signal is realized, but also the position of the fuse 10 is relatively fixed, making the entire structure more stable. In addition, the structure of multiple elastic arms 31 also makes the connection between the fuse 10 and the connection terminal 20 more reliable. Even if some of the elastic arms 31 fail, the effective connection between the fuse 10 and the connection terminal 20 can still be guaranteed, reducing the failure rate of the conduction circuit.

[0033] Preferably, the elastic arm 31 is in a zigzag or curved shape. Compared with a straight-line structure, the zigzag or curved elastic arm 31 can increase the number of contact points between the elastic arm 31 and the fuse 10 and the connection terminal 20, thereby increasing the overall contact area, which is conducive to ensuring the conduction effect. In this embodiment, a part of the elastic arm 31 protrudes toward the fuse 10 and forms a protrusion 311. In the free state without the fuse 10 inserted, the bending structure of the elastic arm 31 and the setting of the protrusion 311 make the elastic arm 31 occupy a larger space in the radial direction. In the working state of inserting the fuse 10, the elastic arm 31 can be squeezed by the fuse 10 and stretched, thereby ensuring the reliability of contact and conduction between the fuse 10 and the connection terminal 20. Specifically, when the fuse 10 is located in the contact spring 30, the protrusion 311 contacts and conducts with the fuse 10, and the protrusion 311 is squeezed by the fuse 10, driving the elastic arm 31 to move toward the connection terminal 20, contacting and conducting the connection terminal 20, and being squeezed by the fuse 10 and the connection terminal 20, the elastic arm 31 stretches, so that the fuse 10 and the connection terminal 20 are stably conducted, thereby improving the reliability of the connection between the fuse 10 and the connection terminal 20.

[0034] Furthermore, there are multiple protrusions 311, and at least two protrusions 311 are formed on each elastic arm 31, that is, the elastic arm 31 forms at least two bent sections or curved sections, so that when the fuse 10 is located in the contact spring 30, at least two protrusions 311 on the elastic arm 31 are in contact with the fuse 10. In this way, even if individual protrusions 311 are damaged, the reliable connection between the fuse 10 and the connecting terminal 20 can still be guaranteed, thereby improving the service life of the contact spring 30.

[0035] like Figure 4 As shown, the contact spring 30 in this embodiment also includes a ring body 32, and the ends of all the elastic arms 31 are connected to the ring body 32 and extend along the axial direction of the ring body 32. The elastic arms 31 are arranged at intervals along the circumference of the ring body 32. In this way, multiple elastic arms 31 are connected together through the ring body 32, so that any elastic arm 31 can play a connecting role to make the fuse 10 and the connecting terminal 20 conductive, thereby improving the reliability of the conductive circuit and reducing the failure rate. In addition, the relative positions between the elastic arms 31 are fixed, so that the contact spring 30 forms an integral component, and the connection structure between the elastic arms 31 and the fuse 10 and the connecting terminal 20 is more stable.

[0036] Considering the connection between the connection terminal 20 and the external wire 50 and the shielding of its internal components, the connection terminal 20 in this embodiment includes a small diameter section 21, a transition section 22 and a large diameter section 23 connected in axial sequence. The large diameter section 23 is sleeved on the outside of the fuse 10 and contacts the contact spring 30. The external wire 50 is inserted into the small diameter section 21 and contacts and conducts with the small diameter section 21. Since the connection terminal 20 is a conductor as a whole, the external wire 50 can be connected with the fuse 10 through the connection terminal 20, and the fuse 10 is added to the circuit. When overheating occurs, the circuit is cut off in time to improve the circuit safety. At the same time, the overall shape of the connection terminal 20 makes it more in line with the matching requirements of the fuse 10 and the external wire 50.

[0037] like Figure 7 As shown, the connection terminal 20 in this embodiment also includes an observation hole 24, which is located at the side wall of the small diameter section 21 and / or the transition section 22 and is connected to the inner cavity of the connection terminal 20. Through the observation hole 24, it is possible to observe whether the external wire 50 is inserted in place, which is convenient for finding the fault location and avoiding repeated disconnection due to circuit blockage or poor contact between the external wire 50 and the connection terminal 20.

[0038] The connecting terminal 20 in this embodiment also includes a terminal stamping seam 25, which radially penetrates the inner and outer sides of the connecting terminal 20 and penetrates the axial ends of the connecting terminal 20. In this way, the connecting terminal 20 can be processed by punching with a punching machine and then winding with a mold to realize mold stamping manufacturing, which greatly reduces the manufacturing cost.

[0039] The wiring harness safety device in this embodiment also includes a housing 40, which is an insulating housing, such as a plastic housing. The housing 40 is sleeved on the outside of the fuse 10 and the connecting terminal 20, and shields the fuse 10 and at least part of the connecting terminal 20. Considering the convenience of wiring, in this embodiment, part of the small-diameter section 21 of the connecting terminal 20 is extended out of the housing 40, and the other parts are contained in the housing 40, so as to protect and fix the components. In order to realize the above-mentioned setting mode of the small-diameter section 21 passing through the housing 40, this embodiment has a wire-passing hole at the end of the housing 40. Since the external wire 50 is passed through and connected at the small-diameter section 21, when the small-diameter section 21 passes through the housing 40 through the wire-passing hole, the external wire 50 in the small-diameter section 21 also passes through the housing 40 through the wire-passing hole, so that the wire-passing hole has the function of allowing the external wire 50 and the small-diameter section 21 to pass through the housing 40 at the same time. At the same time, in order to facilitate the connection of the external wire 50 with the small diameter section 21, the present embodiment sets the observation hole 24 on the small diameter section 21. In this way, the observation hole 24 also passes through the housing 40, so that the external wire 50 can be easily connected and removed without having to disassemble the wiring harness safety device as a whole, which is convenient and quick. Of course, it is also possible not to adopt the setting method of passing the small diameter section 21 through the housing 40. In this case, only the wire hole can be used as the hole for the external wire 50 to pass through the housing 40, so that the external wire 50 can pass through the connection terminal 20 and connect to the external circuit. The specific shape of the housing 40 can be set accordingly as needed. Based on the shape of the aforementioned connection terminal 20, the housing 40 can also be set to a similar shape, or the housing 40 can be directly set to a cylindrical shape, etc.

[0040] Preferably, the shell 40 of this embodiment is arranged in a split manner, which includes a male shell and a female shell. The male shell and the female shell are respectively located on the outside of the two connecting terminals 20, and the two are locked by threads. In this way, the overall structure is small in size, simple in structure, and easy to install and disassemble. When the fuse 10 fails and needs to be repaired and replaced, the male shell and the female shell can be easily opened.

[0041] like Figure 5 As shown, the fuse 10 in this embodiment includes a fuse body 11 and a plurality of conductive caps 12. The fuse body 11 is columnar, and the conductive caps 12 are located at the ends of the fuse body 11. When the fuse 10 is located in the contact spring 30, the contact spring 30 is in contact with the conductive cap 12 for conduction, that is, the conductive cap 12 serves as a structure for connecting the fuse 10 with the contact spring 30, so that the fuse body 11 is connected to the circuit.

[0042] It should be noted that, the multiple in the above embodiments refers to at least two.

[0043] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0044] 1. Solve the problem of poor safety of low-voltage wiring harnesses in the prior art;

[0045] 2. Introduce the fuse into the low-voltage wiring harness environment to realize the function of adding a fuse in the low-voltage wiring harness to adapt to the working conditions of the current module sampling;

[0046] 3. The entire disassembly and assembly process is convenient and quick, and fuse replacement and other component repairs can be easily performed, while the volume is smaller;

[0047] 4. Simple processing and manufacturing, low manufacturing cost.

[0048] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0051] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A wiring harness safety device, characterized in that: include: Fuse (10); A plurality of connection terminals (20) for connecting to external wires (50), wherein the connection terminals (20) are sleeved on the outside of the fuse (10) and are provided with a gap between the connection terminals and the fuse (10); A plurality of contact springs (30), wherein the contact springs (30) are arranged in a gap between the fuse (10) and the connection terminal (20), the connection terminal (20) is electrically connected to the fuse (10) via the contact springs (30), and an end of the fuse (10) is clamped in the contact springs (30).

2. The wire harness safety device according to claim 1, characterized in that: The contact spring (30) comprises a plurality of elastic arms (31), wherein the elastic arms (31) are located in a gap between the fuse (10) and the connecting terminal (20), and each of the elastic arms (31) is arranged along the circumference of the fuse (10) to form a receiving area, and the fuse (10) is located in the receiving area.

3. The wire harness safety device according to claim 2, characterized in that: The elastic arm (31) is in a broken line or curved line shape, a portion of the elastic arm (31) protrudes toward the fuse (10) and forms a protrusion (311), and when the fuse (10) is located in the contact spring (30), the protrusion (311) contacts and conducts with the fuse (10).

4. The wire harness safety device according to claim 3, characterized in that: There are a plurality of protrusions (311), and at least two protrusions (311) are formed on each of the elastic arms (31); when the fuse (10) is located in the contact spring (30), at least two protrusions (311) on the elastic arm (31) are in contact with the fuse (10).

5. The wire harness safety device according to claim 2, characterized in that: The contact spring (30) further comprises a ring body (32), the ends of the elastic arms (31) being connected to the ring body (32) and extending along the axial direction of the ring body (32), and the elastic arms (31) being arranged at intervals along the circumference of the ring body (32).

6. The wire harness safety device according to claim 1, characterized in that: The connecting terminal (20) comprises a small diameter section (21), a transition section (22) and a large diameter section (23) which are connected in sequence axially; the large diameter section (23) is sleeved on the outside of the fuse (10) and is in contact with the contact spring (30); the external wire (50) is passed through the small diameter section (21) and is in contact with the small diameter section (21) for conduction.

7. The wire harness safety device according to claim 6, characterized in that: The connecting terminal (20) further comprises an observation hole (24), wherein the observation hole (24) is located at the side wall of the small-diameter section (21) and / or the transition section (22), and is communicated with the inner cavity of the connecting terminal (20).

8. The wire harness safety device according to claim 6, characterized in that: The connecting terminal (20) further comprises a terminal punching seam (25), wherein the terminal punching seam (25) radially penetrates both inner and outer sides of the connecting terminal (20) and penetrates both axial ends of the connecting terminal (20).

9. The wire harness safety device according to claim 1, characterized in that: The wiring harness safety device further comprises a shell (40), the shell (40) being an insulating shell, the shell (40) being sleeved on the outside of the fuse (10) and the connecting terminal (20), and shielding the fuse (10) and at least a part of the connecting terminal (20), and a wire hole for the external wire (50) to pass through is provided at the end of the shell (40).

10. The wire harness safety device according to claim 1, characterized in that: The fuse (10) comprises a fuse body (11) and a plurality of conductive caps (12); the conductive caps (12) are located at the ends of the fuse body (11); when the fuse (10) is located in the contact spring piece (30), the contact spring piece (30) and the conductive caps (12) are in contact and conductive.

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