Overload protection element
By using a high-temperature resistant core and a wound fuse wire to form a double helix, the contact area is increased, which solves the problem of unstable fuse melting in high current overload protection and achieves stronger overload protection and stable welding effect.
Patent Information
- Application Number
- CN202423070408.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Existing fuses cannot effectively blow during high current overload protection, thus failing to safely withstand high current overload protection.
The high-temperature resistant core and the first and second fuse wires wound on it form a double helix structure, which increases the contact area to solve the problem of poor soldering. By increasing the contact area between the wire-wound fuse and the solder, it ensures effective melting and breaking under high current.
It achieves stable melting under high current, avoids cold solder joints, and provides stronger overload protection.
Smart Images
Figure CN223598661U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of circuit protection device, specifically relates to an overload protection element. BACKGROUND
[0002] Before the short circuit of the circuit, the fuse can be used to act as the protection piece, however, for the requirement of overload protection, generally still need to consider the large current overload protection performance of the fuse, in the prior art, the protection piece made by utilizing the conventional fuse usually only plays the effect of fast fusing, cannot effectively realize the overload protection of large current. Therefore, a novel technical scheme is urgently needed to solve the above problems. SUMMARY
[0003] The utility model discloses to aim at the deficiency of prior art, provides an overload protection element, and it is good in security, and the stability is strong, can provide effective overload protection.
[0004] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:
[0005] An overload protection element, including high temperature resistant core and the first fuse wire body and the second fuse wire body of winding in high temperature resistant core,
[0006] The first fuse wire body includes the first winding section and the third winding section connected in sequence;
[0007] The second fuse wire body includes the second winding section and the fourth winding section connected in sequence;
[0008] The first winding section and the second winding section are arranged without interval and in parallel, and the third winding section and the fourth winding section are arranged without interval and in parallel.
[0009] As an improvement of the overload protection element of the utility model, the cross-sectional width of the second fuse wire body is not less than the cross-sectional width of the first fuse wire body.
[0010] As an improvement of the overload protection element of the utility model, the center of the fourth winding section and the center of the first winding section have a first gap, and the center of the second winding section and the center of the third winding section have a second gap.
[0011] As an improvement of the overload protection element of the utility model, the width of the second gap is not less than the width of the first gap.
[0012] As an improvement of the overload protection element of the utility model, the high temperature resistant core has a groove matched with the first fuse wire body and the second fuse wire body.
[0013] As an improvement of the overload protection element, the depth of the groove is less than the thickness of the first fuse wire body or the second fuse wire body.
[0014] As an improvement of the overload protection element, the first fuse wire body and the second fuse wire body are round wires or flat wires.
[0015] As an improvement of the overload protection element, the cross-sectional width of the first fuse wire body is at least 5 mm.
[0016] As an improvement of the overload protection element, the thickness of the high-temperature-resistant core body is greater than the thickness of the first fuse wire body or the second fuse wire body.
[0017] As an improvement of the overload protection element, the melting point of the first fuse wire body and the second fuse wire body is not less than 260 DEG C, and the melting point of the high-temperature-resistant core body is at least 300 DEG C.
[0018] The utility model discloses the beneficial effect lies in: the utility model discloses a high-temperature-resistant core body and winding first fuse wire body and second fuse wire body of high-temperature-resistant core body, first fuse wire body includes first winding section and third winding section connected in proper order, and second fuse wire body includes second winding section and fourth winding section connected in proper order, and first fuse wire body and second fuse wire body are single line body, wherein, first winding section and second winding section are arranged without interval and parallel, and third winding section and fourth winding section are arranged without interval and parallel, so that first fuse wire body and second fuse wire body can constitute double helix fuse wire, to ensure that when welding, it is more easy to dip solder with greater area, and the situation of false welding does not appear, and the overall of element is stronger to the bearing capacity of large current, solves the problem that the existing fuse cannot safely bear large current overload protection and corresponding fusing requirement. BRIEF DESCRIPTION OF DRAWINGS
[0019] Fig. 1 It is structural schematic drawing of the embodiment 1 of the utility model.
[0020] Fig. 2 It is structural schematic drawing of the embodiment 2 of the utility model.
[0021] Fig. 3 It is structural schematic drawing of the high-temperature-resistant core body of the embodiment 3 of the utility model.
[0022] Wherein: 1, first fuse wire body, 1a, first winding section, 1b, third winding section, 2, second fuse wire body, 2a, second winding section, 2b, fourth winding section, 10, high-temperature-resistant core body, 11, first gap, 12, second gap, 13, groove. DETAILED DESCRIPTION
[0023] As used in the specification and claims, some terms can have special meanings. Those of ordinary skill in the art will understand that a manufacturer can use terms different from the terms defined herein, and a term used in the specification and claims should not be interpreted as being restricted to only the meaning of that term. The specification and claims should not be construed as being limited by the terminology used in the specification and claims.
[0024] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "horizontal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0025] In the present application, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. Those of ordinary skill in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.
[0026] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments, but should not be limited to the present application. Figs. 1-3 The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments, but should not be limited to the present application.
[0027] Example 1
[0028] An overload protection element, such as Fig. 1As shown, the fuse wire includes a high-temperature-resistant core 10, and a first fuse wire body 1 and a second fuse wire body 2 wound on the high-temperature-resistant core 10, the first fuse wire body 1 and the second fuse wire body 2 are both round wires, wherein the first fuse wire body 1 includes a first winding section 1a and a third winding section 1b connected in sequence, the first winding section 1a and the third winding section 1b are of the same structure, the second fuse wire body 2 includes a second winding section 2a and a fourth winding section 2b connected in sequence, the second winding section 2a and the fourth winding section 2b are of the same structure, the first winding section 1a and the second winding section 2a are arranged side by side without spacing, and the third winding section 1b and the fourth winding section 2b are arranged side by side without spacing, since the first fuse wire body 1 and the second fuse wire body 2 form winding sections arranged side by side, the cross-sectional width of the fuse wire can be larger, so as to provide a larger contact area and better welding effect, and the problem of virtual welding is solved by increasing the contact area of the winding fuse wire and the solder, and the fuse wire structure for improving virtual welding of large-current products is obtained.
[0029] Preferably, the cross-sectional width of the second fuse wire body 2 is not less than the cross-sectional width of the first fuse wire body 1, the cross-sectional width of the second fuse wire body 2 can be equal to the cross-sectional width of the first fuse wire body 1, or the cross-sectional width of the second fuse wire body 2 can be 1.1-1.5 times the cross-sectional width of the first fuse wire body 1. When the sizes of the first fuse wire body 1 and the second fuse wire body 2 are the same, that is, the cross-sectional width and the thickness of the two are equal, the performance of the product is the most stable.
[0030] Preferably, the first gap 11 is between the center of the fourth winding section 2b and the center of the first winding section 1a, and the second gap 12 is between the center of the second winding section 2a and the center of the third winding section 1b.
[0031] Preferably, the first gap 11 is between the center of the fourth winding section 2b and the center of the first winding section 1a, and the second gap 12 is between the center of the second winding section 2a and the center of the third winding section 1b.
[0032] Preferably, the width of the second gap 12 is not less than the width of the first gap 11, the width of the second gap 12 can be equal to the width of the first gap 11, or the width of the second gap 12 can be 1.1-1.5 times the width of the first gap 11.
[0033] Preferably, the cross-sectional width of the first fuse wire body 1 is at least 5 mm.
[0034] Preferably, the thickness of the high-temperature-resistant core 10 is greater than the thickness of the first fuse wire body 1 or the second fuse wire body 2, and the thickness of the high-temperature-resistant core 10 can be greater than the thickness of the first fuse wire body 1 or the second fuse wire body 2, respectively.
[0035] In order to ensure that the first fuse wire body 1 and the second fuse wire body 2 can be soldered, the melting point of the first fuse wire body 1 and the second fuse wire body 2 is not less than 260℃, and at the same time, the melting point of the high-temperature-resistant core 10 is at least 300℃, and the material of the high-temperature-resistant core 10 can be glass fiber or a high-temperature-resistant insulator containing glass fiber.
[0036] Embodiment 2
[0037] The difference between this embodiment and embodiment 1 is that, as shown in Fig. 2 The first fuse wire body 1 and the second fuse wire body 2 are both flat wires, and since the first fuse wire body 1 and the second fuse wire body 2 form parallel winding sections, the cross-sectional width of the fuse wire can be larger to provide a larger contact area and better soldering effect, and the problem of false soldering is solved by increasing the contact area between the winding fuse and solder, thereby obtaining a fuse structure that improves the false soldering of large-current products.
[0038] The other structures of this embodiment are the same as those of embodiment 1, and will not be described here.
[0039] Embodiment 3
[0040] The difference between this embodiment and embodiment 1 or 2 is that, as shown in Fig. 3 The high-temperature-resistant core 10 has a groove 13 matched with the first fuse wire body 1 and the second fuse wire body 2.
[0041] Preferably, the depth of the groove 13 is less than the thickness of the first fuse wire body 1 or the second fuse wire body 2, so that the first fuse wire body 1 and the second fuse wire body 2 can be normally soldered.
[0042] The other structures of this embodiment are the same as those of embodiment 1 or 2, and will not be described here.
[0043] In some large-scale, large-current fusing products, the contact area between the fuse and the solder is usually small during welding, which makes the fuse not easy to be coated with the solder, thereby causing a virtual welding, but if a thinner fuse or a smaller spacing between the fuses is used, the performance or specification of the product cannot meet the expected requirements, thereby causing the product development to fail. Compared with the prior art, the application solves the virtual welding problem caused by the small contact area between the fuse and the solder during welding of the existing winding fuse. Obviously, the fuse wire structure capable of forming a double helix in the utility model makes the cross-sectional width of the fuse wire larger to provide a larger contact area and better welding effect, and the virtual welding problem is solved by increasing the contact area between the winding fuse and the solder, and the problem that the existing fuse cannot safely withstand a large current slow fusing and cannot realize the overload protection requirement is solved.
[0044] According to the disclosure and teaching of the above description, those skilled in the art of the utility model can also change and modify the above embodiments. Therefore, the utility model is not limited to the above specific embodiments, and any obvious improvement, replacement or modification made by those skilled in the art on the basis of the utility model belongs to the protection scope of the utility model. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the utility model.
Claims
1. An overload protection element, characterized in that The application relates to a high-temperature-resistant core (10) and a first safety wire body (1) and a second safety wire body (2) wound on the high-temperature-resistant core (10). The first safety wire body (1) comprises a first winding section (1a) and a third winding section (1b) connected in sequence. The second safety wire body (2) comprises a second winding section (2a) and a fourth winding section (2b) connected in sequence. The first winding section (1a) and the second winding section (2a) are arranged without spacing, and the third winding section (1b) and the fourth winding section (2b) are arranged without spacing. The cross-sectional width of the second safety wire body (2) is not less than the cross-sectional width of the first safety wire body (1).
2. The overload protection element of claim 1, wherein: The center of the fourth winding section (2b) and the center of the first winding section (1a) have a first gap (11), and the center of the second winding section (2a) and the center of the third winding section (1b) have a second gap (12).
3. The overload protection element of claim 1, wherein: The width of the second gap (12) is not less than the width of the first gap (11).
4. An overload protection element as claimed in claim 3, characterised in that: The high-temperature-resistant core (10) has a groove (13) matched with the first safety wire body (1) and the second safety wire body (2).
5. The overload protection element of claim 1, wherein: The depth of the groove (13) is less than the thickness of the first safety wire body (1) or the second safety wire body (2).
6. An overload protection element as claimed in claim 5, characterised in that: The first safety wire body (1) and the second safety wire body (2) are round wires or flat wires.
7. An overload protection element according to any one of claims 1 to 6, characterised in that: The cross-sectional width of the first safety wire body (1) is at least 5 mm.
8. An overload protection element according to any one of claims 1 to 6, characterised in that: The thickness of the high-temperature-resistant core (10) is greater than the thickness of the first safety wire body (1) or the second safety wire body (2).
9. An overload protection element according to any one of claims 1 to 6, characterised in that: The melting point of the first safety wire body (1) and the second safety wire body (2) is not less than 260 DEG C, and the melting point of the high-temperature-resistant core (10) is at least 300 DEG C.
10. An overload protection element according to any one of claims 1 to 6, characterised in that: