Circuit protection element
By designing a circuit protection element with a dual-fuse structure, the problem that existing protection elements cannot safely withstand large currents is solved, achieving efficient assembly in a smaller space and stronger overcurrent capability, thus improving safety and mechanical strength.
Patent Information
- Application Number
- CN202422938423.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing circuit protection components cannot safely withstand large currents before a short circuit, and their structure is not suitable for folding assembly, resulting in insufficient safety.
A circuit protection element is designed, which uses at least two connected first and second fuses, connected by a first fold to form a double fuse structure, and provides a fuse-breaking part and a through hole at the connection point to enhance the overcurrent capacity and mechanical strength.
It enables assembly in a smaller space and stronger overcurrent capability, improves the safety and mechanical strength of the fuse, and meets the requirements for high current fusing.
Smart Images
Figure CN223513894U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of circuit protection devices, and specifically relates to a circuit protection element. Background Technology
[0002] Before a short circuit occurs, a fuse can be used as a circuit protection element. However, conventional protection elements are often single, short, narrow, flat, and sheet-like structures, which cannot meet the requirements of folding and assembling within a ceramic tube, nor can they meet the requirements of fusing high currents, making the inherent safety of such protection elements too low. Therefore, there is an urgent need to propose a new technical solution to address the above problems. Utility Model Content
[0003] The purpose of this invention is to provide a circuit protection element that addresses the shortcomings of existing technologies and improves the safety of component meltdown.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A circuit protection element includes at least two connected first fuses and at least two connected second fuses, two adjacent first fuses are connected by at least one first fuse break, two adjacent second fuses are connected by at least one second fuse break, the first fuses are connected to the second fuses, and the connection between the first fuses and the second fuses has a first crease.
[0006] As an improvement of the circuit protection element described in this utility model, a first through hole is provided between the first fuse portion and the second fuse portion, which is directly opposite the first crease.
[0007] As an improvement to the circuit protection element described in this utility model, at least one of the first fuse and the second fuse has a second through hole.
[0008] As an improvement to the circuit protection element described in this utility model, at least one of the first fuse and the second fuse has an extension section.
[0009] As an improvement to the circuit protection element described in this utility model, the extension of the first fuse is connected to the extension of the second fuse, and the connection point has a second crease directly opposite the first crease.
[0010] As an improvement to the circuit protection element described in this utility model, both the first fuse and the second fuse have a third crease perpendicular to the first crease.
[0011] As an improvement of the circuit protection element described in this utility model, at least one of the first fuse part and the second fuse part is a straight sheet, a curved sheet or a serrated sheet.
[0012] As an improvement of the circuit protection element described in this utility model, the circuit protection element has an axisymmetric structure, and the first crease is the axis of symmetry.
[0013] As an improvement to the circuit protection element described in this utility model, the width of the first fuse part is W1, the width of the second fuse part is W2, the width of the first fuse element is W3, and the width of the second fuse element is W4, satisfying the relationship: 0 <W1 / W3<0.5,0<W2 / W4<0.5。
[0014] As an improvement to the circuit protection element described in this utility model, the lengths of the first fuse part, the second fuse part, and the first through hole are all equal.
[0015] The beneficial effects of this utility model are as follows: This utility model includes at least two connected first fuses, with two adjacent first fuses connected by at least one first fuse breaking part, and also includes at least two connected second fuses, with two adjacent second fuses connected by at least one second fuse breaking part. Furthermore, the first fuses are connected to the second fuses, and the connection between the first fuses and the second fuses has a first crease, so that the first fuses can be folded toward the second fuses and form an integral double fuse structure. This allows the fuses to be assembled in a smaller space and has a stronger overcurrent capacity, solving the problem that existing fuses cannot safely withstand the requirements of high current fusing. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.
[0017] Figure 2 This is a schematic diagram showing the dimensions of the first fused piece in Embodiment 1 of this utility model.
[0018] Figure 3 This is a schematic diagram showing the dimensions of the second fused piece in Embodiment 1 of this utility model.
[0019] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model.
[0020] Figure 5 This is a structural schematic diagram of Embodiment 3 of the present invention.
[0021] Figure 6 This is a schematic diagram of the structure of Embodiment 4 of this utility model.
[0022] Wherein: 1. First fusible link; 10. First fusible section; 2. Second fusible link; 20. Second fusible section; 3. First crease; 4. First through hole; 5. Second through hole; 6. Extension section; 7. Second crease; 8. Third crease. Detailed Implementation
[0023] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.
[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0026] The following is in conjunction with the appendix Figures 1-6 The present invention will be further described in detail with reference to specific embodiments, but this is not intended to limit the present invention.
[0027] Example 1
[0028] A circuit protection element, such as Figures 1-3As shown, it includes at least two connected first fuses 1 and at least two connected second fuses 2. Two adjacent first fuses 1 are connected by at least one first fuse break 10, and two adjacent second fuses 2 are connected by at least one second fuse break 20. The first fuses 1 are connected to the second fuses 2. The connection between the first fuses 1 and the second fuses 2 has a first crease 3, wherein the first crease 3 is used to fold the first fuses 1 toward the second fuses 2 to form an integral foldable double fuse structure.
[0029] Because the double fuse structure has a stronger overcurrent capacity, this structure can be used as a high-current fuse type fuse. Furthermore, after the double fuse is folded in half, it can occupy less internal space in the circuit protector consisting of circuit protection elements and housing. In addition, the double fuse has higher mechanical strength and stronger fuse safety.
[0030] Preferably, the circuit protection element of this embodiment can be manufactured by laser cutting metal sheets, and the first fuse 1 and the second fuse 2 have a width corresponding to the size of the outer shell, which ensures that the first fuse 1 and the second fuse 2 in the circuit protection element of the circuit protector can withstand large currents.
[0031] Preferably, both the first fusing portion 10 and the second fusing portion 20 can be used for fusing, and a first through hole 4 is provided between the first fusing portion 10 and the second fusing portion 20, which is directly opposite the first crease 3, so that the first fusing portion 10 and the second fusing portion 20 are arranged separately.
[0032] Preferably, neither the first fuse portion 10 nor the second fuse portion 20 is a folded structure.
[0033] Preferably, both the first fuse 1 and the second fuse 2 have a third fold 8 perpendicular to the first fold 3. The third fold 8 in the first fuse 1 can bend a part of the first fuse 1 to form a vertical surface with another part, and a part of the first fuse 1 can be exposed on the outer casing and then connected to the circuit. The third fold 8 in the second fuse 2 can bend a part of the second fuse 2 to form a vertical surface with another part, and a part of the second fuse 2 can be exposed on the outer casing and then connected to the circuit.
[0034] Preferably, at least one of the first fusing portion 10 and the second fusing portion 20 is a straight sheet, a curved sheet, or a serrated sheet. When there are multiple first fusing portions 10 and multiple second fusing portions 20, the multiple first fusing portions 10 are spaced apart, and the multiple second fusing portions 20 are spaced apart.
[0035] Preferably, the circuit protection element has an axisymmetric structure, with the first crease 3 being the axis of symmetry.
[0036] Preferably, the width of the first fusible portion 10 is W1, and the width of the first fusible piece 1 is W3, satisfying the relationship: 0 <W1 / W3≤0.1,0.1≤W1 / W3≤0.2,0.2≤W1 / W3≤0.3,0.3≤W1 / W3≤0.4,0.4≤W1 / W3<0.5。
[0037] Preferably, the width of the second fusible portion 20 is W2, and the width of the second fusible piece 2 is W4, satisfying the relationship: 0 <W2 / W4≤0.1,0.1≤W2 / W4≤0.2,0.2≤W2 / W4≤0.3,0.3≤W2 / W4≤0.4,0.4≤W2 / W4<0.5。
[0038] Preferably, the lengths of the first fusing portion 10, the second fusing portion 20, and the first through hole 4 are all equal.
[0039] Preferably, the first crease 3 can be a groove, the depth of which can be at most half the thickness of the molten sheet, and the length of the third crease 8 is less than the width of the first molten section 10. The third crease 8 can be a short groove or a short through groove, the depth of which is at least half the thickness of the molten sheet or completely penetrates the molten sheet, so as to ensure that the molten sheet can be folded more efficiently.
[0040] To ensure maximum contact area between the fuse and the end cap of the circuit protector, the optimal solution is to leave the fuse end undesigned and use a single fuse piece.
[0041] Example 2
[0042] The difference between this embodiment and embodiment 1 is that, Figure 4 As shown, at least one of the first molten sheet 1 and the second molten sheet 2 is provided with a second through hole 5. The second through hole 5 is located close to the first crease 3. Both the first through hole 4 and the second through hole 5 can be made by a punching process to effectively reduce the difficulty of bending the first molten sheet 1 toward the second molten sheet 2.
[0043] The other structures in this embodiment are the same as those in Embodiment 1, and will not be described again here.
[0044] Example 3
[0045] The difference between this embodiment and embodiment 1 is that, Figure 5 As shown, at least one of the first fuse 1 and the second fuse 2 has an extension 6. The length of the extension 6 is not greater than the length of the fuse section. The extension 6 is used to adjust the shape and structure of the fuse tip to flexibly adapt to various types of circuit protectors.
[0046] The other structures in this embodiment are the same as those in Embodiment 1, and will not be described again here.
[0047] Example 4
[0048] The difference between this embodiment and embodiment 1 is that, Figure 6 As shown, at least one of the first fuse 1 and the second fuse 2 has an extension 6, the length of which is not greater than the length of the fuse portion. The extension 6 of the first fuse 1 is connected to the extension 6 of the second fuse 2, and the connection point has a second crease 7 directly opposite the first crease 3. However, neither the first fuse 1 nor the second fuse 2 has a third crease 8 perpendicular to the first crease 3. This adjustment allows for flexible adaptation to various types of circuit protectors.
[0049] The other structures in this embodiment are the same as those in Embodiment 1, and will not be described again here.
[0050] Obviously, this invention can form an integrated double fuse structure, which allows the fuse to be assembled in a smaller space and has a stronger overcurrent capacity, solving the problem that existing fuses cannot safely withstand the requirements of high current melting.
[0051] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on the utility model are within the protection scope of the utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the utility model.
Claims
1. A circuit protection element, characterized in that, include: At least two connected first fuses (1), and two adjacent first fuses (1) are connected by at least one first fuse section (10); At least two connected second fuses (2), with two adjacent second fuses (2) connected by at least one second fuse section (20); The first fusible link (1) is connected to the second fusible link (2), and the connection between the first fusible link (1) and the second fusible link (2) has a first crease (3).
2. The circuit protection element as described in claim 1, characterized in that: A first through hole (4) is provided between the first fused portion (10) and the second fused portion (20), directly opposite the first crease (3).
3. The circuit protection element as described in claim 1 or 2, characterized in that: At least one of the first molten sheet (1) and the second molten sheet (2) has a second through hole (5).
4. The circuit protection element as described in claim 1 or 2, characterized in that: At least one of the first molten sheet (1) and the second molten sheet (2) has an extension (6).
5. The circuit protection element as described in claim 4, characterized in that: The extension (6) of the first fused sheet (1) is connected to the extension (6) of the second fused sheet (2) and the connection has a second crease (7) directly opposite the first crease (3).
6. The circuit protection element as described in claim 1 or 2, characterized in that: Both the first fold (1) and the second fold (2) have a third fold (8) perpendicular to the first fold (3).
7. The circuit protection element as described in claim 1 or 2, characterized in that: At least one of the first fusible portion (10) and the second fusible portion (20) is a flat sheet, a curved sheet, or a serrated sheet.
8. The circuit protection element as described in claim 1 or 2, characterized in that: The circuit protection element has an axisymmetric structure, and the first crease (3) is the axis of symmetry.
9. The circuit protection element as described in claim 1 or 2, characterized in that: The width of the first fusible link (10) is W1, the width of the second fusible link (20) is W2, the width of the first fusible strip (1) is W3, and the width of the second fusible strip (2) is W4, satisfying the relationship: 0 <W1 / W3<0.5,0<W2 / W4<0.5。 10. The circuit protection element as described in claim 2, characterized in that: The lengths of the first fuse portion (10), the second fuse portion (20), and the first through hole (4) are all equal.