A high protection characteristic surge impact resistant fuse

Abstract

The utility model relates to the technical fields of circuit protection device especially, it is a kind of high protection characteristic anti-surge impact's fuse, its technical scheme's main point includes: first casing;Second casing, with the first casing is connected, the first casing with the second casing between there is accommodating cavity;Terminal, between the first casing and the second casing described in, the terminal has the fusing portion of bended setting, and the fusing portion is located in the accommodating cavity;And reinforcing element, the reinforcing element is sequentially set in the first casing, second casing and terminal, and the first casing, second casing and terminal are mutually fixed connection, the present application has solved the problem of insufficient torque design of existing structure terminal installation.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit protection devices, and in particular to a fuse with high protection characteristics and surge protection. Background Technology

[0002] A fuse is an overcurrent protection device widely used in power systems, industrial control systems, and household appliances. Its core working principle is based on the thermal effect of current. When the system current exceeds a predetermined value for a certain period, the fusible element melts due to its own heating, thus breaking the circuit and protecting downstream electrical equipment and lines. It is an indispensable and important component in power systems.

[0003] Currently, conventional fuses consist of terminals and two housings. The terminals are located between the two housings, which are assembled by ultrasonic welding. The two housings simultaneously clamp and fix the terminals, which are responsible for connecting to the circuit system and protecting the circuit.

[0004] However, the conventional fuse structure has many drawbacks. For example, in actual installation, fuses often need to be assembled under conditions with large installation torque. However, conventional terminal structures are prone to deformation and breakage, making the product susceptible to failure. Therefore, it is necessary to improve the existing technology.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] This invention provides a surge-resistant fuse with high protection characteristics to solve the problem of insufficient terminal installation torque design in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A surge-impact resistant fuse with high protection characteristics, comprising:

[0009] First shell;

[0010] The second housing is connected to the first housing, and there is an accommodating cavity between the first housing and the second housing;

[0011] A terminal is disposed between the first housing and the second housing, the terminal having a bent fuse portion located within the receiving cavity;

[0012] The reinforcement element is sequentially disposed through the first housing, the second housing, and the terminal, and the first housing, the second housing, and the terminal are fixedly connected to each other.

[0013] Preferably, the reinforcing element is a rivet, the first housing has a first through hole, the second housing has a second through hole, and the terminal has a third through hole. The first through hole, the second through hole, and the third through hole are connected. The reinforcing element passes through the first through hole, the second through hole, and the third through hole and rivets and fixes the first housing, the second housing, and the terminal.

[0014] Preferably, there are multiple reinforcing elements, which are respectively disposed on opposite sides of the first housing and the second housing.

[0015] Preferably, the fused portion is a groove-shaped bend, a trapezoidal bend, an I-beam bend, an arc bend, or a V-shaped bend.

[0016] Preferably, the fused portion has multiple connecting arms arranged in parallel to each other.

[0017] Preferably, the first housing is provided with a positioning post, the second housing is provided with a positioning groove for the positioning post to be inserted and engaged, and the terminal is provided with a positioning hole for the positioning post to pass through;

[0018] Alternatively, the second housing may have a positioning post, the first housing may have a positioning groove for the positioning post to be inserted and engaged, and the terminal may have a positioning hole for the positioning post to pass through.

[0019] Preferably, the first housing and / or the second housing are provided with an arc-extinguishing part, which is located within the accommodating cavity.

[0020] Preferably, the arc-extinguishing section comprises multiple grid plates arranged at intervals.

[0021] Preferably, the arc-extinguishing part includes:

[0022] The first arc-extinguishing protrusion has a first arc-extinguishing recess;

[0023] And a second arc-extinguishing boss, having a second arc-extinguishing recess disposed opposite to the first arc-extinguishing recess.

[0024] Preferably, the first housing and the second housing are made of PA9T material; and / or the terminals are made of T2 copper material.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The surge-resistant fuse with high protection characteristics provided by this utility model has a bent fuse section that can improve its torsional resistance. At the same time, the reinforcing element passes through the first housing, the second housing and the terminal, so that the reinforcing element connects the three with the force, thereby improving the structural fit of the fuse, making the terminal less prone to torsion and breakage, and solving the problem of insufficient terminal installation torque design.

[0027] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the surge-resistant fuse with high protection characteristics provided in this embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the assembly relationship of the surge-resistant fuse with high protection characteristics provided in this embodiment of the utility model;

[0031] Figure 3 This is a schematic diagram of the terminal structure according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the first housing provided in an embodiment of the present utility model;

[0033] Figure 5 This is a schematic diagram of the structure of the second housing provided in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the second housing provided in another embodiment of the present invention.

[0035] Figure label:

[0036] 100, Receiving cavity; 200, First through hole; 300, Second through hole; 400, Third through hole; 500, Positioning hole; 1, First housing; 2, Second housing; 3, Terminal; 31, Fusible link; 3111, Connecting arm; 4, Reinforcing element; 5, Positioning post; 6, Positioning groove; 7, Arc extinguishing part;

[0037] 8. First arc-extinguishing boss; 81. First arc-extinguishing recess; 9. Second arc-extinguishing boss; 91. Second arc-extinguishing recess. Detailed Implementation

[0038] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0039] In the description of this utility model, it should be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component that is centrally positioned therein. When a component is considered to be "set" on another component, it can be directly set on the other component or there may be a component that is centrally positioned therein.

[0040] Furthermore, terms such as "long," "short," "inner," and "outer" indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not indicate or imply that the device or component referred to must have this specific orientation or operate in a specific orientational configuration. Therefore, they should not be construed as limitations of this utility model.

[0041] The following is in conjunction with the appendix Figure 1-6 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0042] Please refer to Figure 1 and Figure 2 This utility model provides a surge-resistant fuse with high protection characteristics, including a first housing 1, a second housing 2, a terminal 3, and a reinforcing element 4.

[0043] The second housing 2 is connected to the first housing 1. There is a receiving cavity 100 between the first housing 1 and the second housing 2. The terminal 3 is disposed between the first housing 1 and the second housing 2. The terminal 3 has a bent fuse part 31. The fuse part 31 is located in the receiving cavity 100. The reinforcing element 4 is sequentially disposed through the first housing 1, the second housing 2 and the terminal 3, and fixes the first housing 1, the second housing 2 and the terminal 3 to each other.

[0044] In some embodiments, the first housing 1 and the second housing 2 are both hollow housing structures with an opening on one side. The openings of the first housing 1 and the second housing 2 are positioned opposite each other and overlap each other, thereby forming a receiving cavity 100 through the cooperation of the first housing 1 and the second housing 2.

[0045] Based on this, clearance grooves are respectively provided on the opposite sides of the first housing 1 or the opposite sides of the second housing 2. The terminal 3 is a strip-shaped sheet structure. The terminal 3 is located between the first housing 1 and the second housing 2, and the two ends of the terminal 3 extend to the outside of the first housing 1 and the second housing 2 through the two clearance grooves respectively. The terminal 3 is used to connect with other electrical components. If the current in the circuit is too large, the fuse part 31 of the terminal 3 will melt, thereby opening the circuit and protecting the circuit.

[0046] Based on this, the fuse portion 31 is bent to one side. Specifically, the fuse portion 31 can be bent towards the side where the first housing 1 is located or towards the side where the second housing 2 is located. There is no restriction on the bending direction of the fuse portion 31. At this time, when the fuse is installed, since the terminal 3 of the fuse is prone to torsion in its own plane, by bending the fuse portion 31, the cross-sectional profile of the fuse portion 31 can be changed. The bent cross-sectional profile can resist greater torque, thereby optimizing and improving the structural strength of the terminal 3.

[0047] In addition, the reinforcing element 4, which passes through the first housing 1, terminal 3 and second housing 2 in sequence, can connect the forces between the first housing 1 and terminal 3, between terminal 3 and second housing 2 and between the first housing 1 and second housing 2. The three are reinforced as a whole, the structural fit is improved, and the torsional resistance of terminal 3 is further optimized and improved.

[0048] Based on the above configuration, the bent fuse part 31 can improve its torsional resistance. At the same time, the reinforcing element 4 connects the three by penetrating the first housing 1, the second housing 2 and the terminal 3, thereby improving the structural fit of the fuse, making the terminal 3 less prone to torsion and breakage, and solving the problem of insufficient installation torque design of the terminal 3.

[0049] In some embodiments, continue to refer to Figure 2 The reinforcing element 4 is a rivet. The first housing 1 is provided with a first through hole 200, the second housing 2 is provided with a second through hole 300, and the terminal 3 is provided with a third through hole 400. The first through hole 200, the second through hole 300 and the third through hole 400 are connected. The reinforcing element 4 passes through the first through hole 200, the second through hole 300 and the third through hole 400 and rivets and fixes the first housing 1, the second housing 2 and the terminal 3.

[0050] The first through hole 200, the second through hole 300, and the third through hole 400 are positioned correspondingly so that when the first housing 1, the second housing 2, and the terminal 3 are assembled together, the three through holes are connected. At this time, by inserting rivets into the first through hole 200, the second through hole 300, and the third through hole 400 and riveting the rivets to fix them, the first housing 1, the second housing 2, and the terminal 3 are fixed together. The installation is convenient, the process is simple, the riveting process has a high success rate, and it can significantly reduce the failure rate of fuses and improve production efficiency.

[0051] In some embodiments, there are multiple reinforcing elements 4, which are respectively disposed on opposite sides of the first housing 1 and the second housing 2.

[0052] Based on the above settings, by setting multiple reinforcing elements 4, a multi-point reinforcement effect can be achieved, thereby further optimizing the overall structural fit of the fuse and further improving its structural stability.

[0053] Optionally, the specific number of reinforcing elements 4 can be two, four, or six, etc. Multiple reinforcing elements 4 can be arranged in an array on opposite sides of the first housing 1 and the second housing 2 to obtain good structural stability. It is understood that the specific number of reinforcing elements 4 can be adjusted according to actual needs, and no specific limitation is made here. In this embodiment, two are set as an example.

[0054] Furthermore, the fusible section 31 is a groove-shaped bend, a trapezoidal bend, an I-beam bend, an arc-shaped bend, or a V-shaped bend.

[0055] It is understood that the aforementioned bending shapes can all improve the torsional resistance of the terminal 3 by changing the cross-sectional profile of the fuse portion 31. Specifically, the groove-shaped profile is a profile that is vertically recessed to one side and has a straight bending structure, while the trapezoidal bend is a profile that is trapezoidal line segment facing one side, and so on. The fuse portion 31 can be provided with various different bending profiles. The various bending profiles will not be described in detail here. In this embodiment, refer to... Figure 3 The fuse section 31 has a trapezoidal bent profile as an example.

[0056] Based on the above configuration, the torsional resistance of the fuse portion 31 can be enhanced through various bending methods, and the structure is flexible. No specific bending profile of the fuse portion 31 is limited here. Regardless of the specific bending structure adopted, as long as it can enhance the torsional resistance of the fuse portion 31, it should be included in the technical scope of this application.

[0057] Furthermore, looking back Figure 2 The fuse section 31 has multiple parallel connecting arms 3111.

[0058] Optionally, the specific number of connecting arms 3111 can be two, three, four, or five, etc. The specific number of connecting arms 3111 can be adjusted according to actual needs, and no specific limit is imposed here.

[0059] Based on the above configuration, the multiple parallel connecting arms 3111 can reduce the cross-sectional area of ​​the material, thereby achieving good fusing performance. In addition, the multiple connecting arms 3111 can achieve multi-point connection, ensuring the structural strength of the fusing part 31 and making it less prone to torsion, thus further optimizing and improving the torsional resistance.

[0060] Reference Figure 2 and Figure 4 In some embodiments, the first housing 1 is provided with a positioning post 5, the second housing 2 is provided with a positioning groove 6 for the positioning post 5 to be inserted and fitted, and the terminal 3 is provided with a positioning hole 500 for the positioning post 5 to pass through.

[0061] Typically, the positioning post 5 is integrally connected with the first housing 1. The positioning post 5 is located on the side surface of the first housing 1 facing the second housing 2. Correspondingly, the positioning groove 6 is recessed on the side surface of the second housing 2 facing the first housing 1 and is opposite to the positioning post 5. The outer contour of the positioning post 5 matches the recessed contour of the positioning groove 6. The positioning hole 500 is provided through the terminal 3.

[0062] Based on the above settings, by inserting the positioning pin into the positioning slot 6, the installation accuracy between the first housing 1 and the second housing 2 can be improved, and the connection strength between the first housing 1 and the second housing 2 can also be improved, thus further optimizing and improving the structural stability. In addition, by passing the positioning pin 5 through the positioning hole 500, the installation strength of the terminal 3 can also be further improved, thus optimizing and improving the structural fit.

[0063] In other embodiments, a positioning post 5 may be provided on the second housing 2, and correspondingly, a positioning groove 6 is provided on the first housing 1 for the positioning post 5 to be inserted and engaged. Based on the above arrangement, the connection accuracy and connection strength between the first housing 1 and the second housing 2 can also be improved. Therefore, no matter where the positioning post 5 is located, it should be included in the scope of interpretation of this application.

[0064] Furthermore, the number of positioning posts 5 can be set to multiple, and the multiple positioning posts 5 are evenly arranged on the first housing 1 or the second housing 2. Correspondingly, the specific number and arrangement of positioning grooves 6 and positioning holes 500 correspond to the positioning posts 5. In this way, a multi-point positioning effect can be achieved between the first housing 1 and the second housing 2, so that the connection accuracy and connection strength of the first housing 1 and the second housing 2 can be further optimized and improved. Here, no limit is placed on the specific number of positioning posts 5 and positioning grooves 6.

[0065] Reference Figure 5 and Figure 6 The first housing 1 and / or the second housing 2 are provided with an arc-extinguishing part 7, which is located inside the accommodating cavity 100.

[0066] The arc-extinguishing section 7 has multiple configuration options:

[0067] In the first configuration, the arc-extinguishing part 7 is disposed in the first housing 1. The arc-extinguishing part 7 can block the electric arc and improve the surge protection performance of the fuse, thereby giving the fuse high protection characteristics.

[0068] In the second configuration, the arc-extinguishing part 7 is located in the second housing 2. The arc-extinguishing part 7 located in the second housing 2 also has the function of blocking the electric arc, which can improve the surge protection performance of the fuse and thus give the fuse high protection characteristics.

[0069] In the third configuration, the arc-extinguishing part 7 is respectively disposed on the first housing 1 and the second housing 2. The arc-extinguishing part 7 located on the first housing 1 and the second housing 2 can cut off the electric arc. Therefore, no matter where the arc-extinguishing part 7 is disposed, as long as it can cut off the electric arc, it should be included in the scope of this solution.

[0070] In some embodiments, refer to Figure 5 The arc-extinguishing section 7 includes multiple grid plates arranged at intervals.

[0071] Specifically, multiple grid plates are arranged sequentially and spaced apart along the edge of the first housing 1 or the second housing 2. At this time, an arc-extinguishing chamber is formed between two grid plates. When an electric arc enters the arc-extinguishing chamber, it can be isolated, thereby playing a role in resisting surge impact.

[0072] It should be explained that the specific number of grid panels can be adjusted according to actual needs, and no limit is imposed on the specific number of grid panels here.

[0073] In some embodiments, the grid plate has an inclined surface that forms a triangular grid profile. The inclined surface can avoid the fused portion 31, making the structure more compact.

[0074] Reference Figure 6 In other embodiments, the arc-extinguishing part 7 includes a first arc-extinguishing boss 8 and a second arc-extinguishing boss 9. The first arc-extinguishing boss 8 has a first arc-extinguishing recess 81, and the second arc-extinguishing boss 9 has a second arc-extinguishing recess 91 disposed opposite to the first arc-extinguishing recess 81.

[0075] Specifically, the first arc-extinguishing protrusion 8 is integrally connected to the inner wall of the accommodating cavity 100 and is located on adjacent sides in the length direction of the terminal 3. At this time, an arc-extinguishing chamber can be formed between the first arc-extinguishing recess 81 and the second arc-extinguishing recess 91. When the arc enters the arc-extinguishing chamber, it can also be extinguished, thereby playing the role of resisting surge impact.

[0076] In some embodiments, the first housing 1 and the second housing 2 are made of PA9T material; and / or the terminal 3 is made of T2 copper material.

[0077] It is understandable that PA9T is a polyamide engineering plastic and also belongs to the nylon series of resin materials. Compared with traditional aliphatic nylons such as PA6 or PA66, PA9T has higher thermal stability, dimensional stability, chemical resistance and low water absorption. At the same time, it also has better voltage resistance characteristics, which can improve the arc extinguishing ability when the circuit current is short-circuited.

[0078] In addition, T2 copper is a high-purity industrial pure copper material with a copper content of ≥99.90%. It has excellent electrical conductivity, thermal conductivity, corrosion resistance and processing performance, and is widely used in electrical, construction, chemical and other fields, meeting the actual use requirements.

[0079] The high-protection and surge-resistant fuse provided in this application embodiment has at least the following beneficial effects:

[0080] 1. It has good structural strength and can resist installation torsion, thus ensuring product quality;

[0081] 2. The housing design improves the product's voltage and segmentation capabilities, can withstand high-intensity surge impacts, and has high protection characteristics;

[0082] 3. The use of riveting technology can significantly reduce the defect rate during product production and improve production quality.

[0083] 4. After adopting the structural process of this solution, the production line will basically not experience the phenomenon of terminal 3 loosening, and the product quality has a high degree of consistency.

[0084] Therefore, the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A surge-impact resistant fuse with high protection characteristics, characterized in that, include: First shell (1); The second housing (2) is connected to the first housing (1), and there is a receiving cavity (100) between the first housing (1) and the second housing (2); Terminal (3) is disposed between the first housing (1) and the second housing (2), and the terminal (3) has a bent fuse portion (31) located in the receiving cavity (100); The reinforcement element (4) is sequentially disposed through the first housing (1), the second housing (2) and the terminal (3), and the first housing (1), the second housing (2) and the terminal (3) are fixedly connected to each other.

2. The surge-impact resistant fuse with high protection characteristics according to claim 1, characterized in that, The reinforcing element (4) is a rivet. The first housing (1) is provided with a first through hole (200), the second housing (2) is provided with a second through hole (300), and the terminal (3) is provided with a third through hole (400). The first through hole (200), the second through hole (300), and the third through hole (400) are connected. The reinforcing element (4) passes through the first through hole (200), the second through hole (300), and the third through hole (400) and rivets and fixes the first housing (1), the second housing (2), and the terminal (3).

3. The surge-impact resistant fuse with high protection characteristics according to claim 2, characterized in that, There are multiple reinforcing elements (4), and the multiple reinforcing elements (4) are respectively disposed on opposite sides of the first housing (1) and the second housing (2).

4. The surge-impact resistant fuse with high protection characteristics according to claim 1, characterized in that, The fused section (31) is a groove-shaped bend, a trapezoidal bend, an I-beam bend, an arc bend, or a V-shaped bend.

5. The surge-impact resistant fuse with high protection characteristics according to claim 1, characterized in that, The fuse section (31) has multiple parallel connecting arms (3111).

6. The surge-impact resistant fuse with high protection characteristics according to claim 1, characterized in that, The first housing (1) is provided with a positioning post (5), the second housing (2) is provided with a positioning groove (6) for the positioning post (5) to be inserted and fitted, and the terminal (3) is provided with a positioning hole (500) for the positioning post (5) to pass through; Alternatively, the second housing (2) is provided with a positioning post (5), the first housing (1) is provided with a positioning groove (6) for the positioning post (5) to be inserted and engaged, and the terminal (3) is provided with a positioning hole (500) for the positioning post (5) to pass through.

7. The surge-impact resistant fuse with high protection characteristics according to claim 1, characterized in that, The first housing (1) and / or the second housing (2) are provided with an arc-extinguishing part (7), which is located in the accommodating cavity (100).

8. The surge-impact resistant fuse with high protection characteristics according to claim 7, characterized in that, The arc-extinguishing section (7) includes multiple grid plates arranged at intervals.

9. The surge-impact resistant fuse with high protection characteristics according to claim 7, characterized in that, The arc-extinguishing part (7) includes: The first arc-extinguishing protrusion (8) has a first arc-extinguishing recess (81); And a second arc-extinguishing boss (9), having a second arc-extinguishing recess (91) disposed opposite to the first arc-extinguishing recess (81).

10. The surge-impact resistant fuse with high protection characteristics according to claim 1, characterized in that, The first housing (1) and the second housing (2) are made of PA9T material; and / or the terminal (3) is made of T2 copper material.

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