Insulation shields, circuit boards and electrical equipment
By setting protective cavity and limiting parts of an insulating protective cover on the outer periphery of the fuse, the problem of insulating protection in the prior art increases the area of the circuit structure, achieving a more compact circuit layout and a more stable insulating protection effect.
Patent Information
- Application Number
- CN202421143527.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-05-23
AI Technical Summary
In the prior art, the circuit structure occupied area increases due to insulation protection of the fuse, and the insulation protection effect is unstable.
An insulating protective cover is designed to insulating and isolation between the fuse and other components by setting protective cavity and limiting parts on the periphery of the fuse and ensuring stability through fixed connections.
It effectively reduces the spacing distance between the fuse tube and components, reduces the overall size of the circuit board and electrical equipment, and improves the stability and reliability of insulation protection.
Smart Images
Figure CN222721848U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of circuit structures, and more specifically, to an insulating protective cover, a circuit board and electrical equipment. Background Art
[0002] In order to ensure the safety of the circuit structure, a fuse needs to be installed in the circuit structure. When the current is too large, the fuse in the fuse will heat up and melt, causing the circuit to be broken, thus preventing the components in the circuit from being overloaded and burned.
[0003] In the related art, insulation protection treatment is required between components and fuses. A common treatment method is to increase the distance between components and fuses to achieve protection in a spatial spacing manner. However, this layout method occupies a large area, which is not conducive to reducing the size of electrical equipment, and has poor stability and reliability in use. Utility Model Content
[0004] The purpose of the embodiments of the present application is to provide an insulating protective cover, a circuit board and an electrical device to solve the technical problem in the prior art that the area occupied by the circuit structure increases due to insulation protection of the fuse.
[0005] For the above purpose, the technical solution adopted in this application is:
[0006] In a first aspect, an insulating protective cover is provided, wherein the insulating protective cover is used to be connected to a fuse tube, a protective cavity is provided inside the insulating protective cover, the protective cavity is used to accommodate the fuse tube, the insulating protective cover is provided with an installation opening connected to the protective cavity, and the installation opening is used for the fuse tube to enter the protective cavity.
[0007] Optionally, a first stopper is provided on a side wall of the installation opening, and the first stopper is used to cooperate with a peripheral side surface of the fuse tube to connect the insulating protective cover and the fuse tube.
[0008] Optionally, the first limiting member has a limiting surface arranged toward the center of the protective cavity, and the limiting surface and the inner wall of the protective cavity are respectively used to abut against the peripheral side surface of the fuse.
[0009] Optionally, two opposite side walls of the installation opening along the width direction are respectively provided with the first limiting members, and the limiting surfaces of the two first limiting members are respectively used to abut against the peripheral side surfaces of the fuse tube to cooperate in clamping the fuse tube.
[0010] Optionally, the first limiting member further has a guiding inclined surface arranged opposite to the limiting surface, and the guiding inclined surfaces on the two first limiting members are arranged in a trumpet shape to cooperate and guide the fuse to move into the protective cavity.
[0011] Optionally, the first limiting member is arranged in a middle area of the protective cavity along the length direction.
[0012] Optionally, the protective cavity includes a connected first chamber and two second chambers, the first chamber is located between the two second chambers, the first chamber and the second chamber are both connected to the installation opening, the first chamber is used to accommodate the insulating tube clamp of the fuse, and the two second chambers are respectively used to accommodate two electrode connecting tubes of the fuse, and the inner wall of the first chamber is provided with heat dissipation holes that penetrate the insulating protective cover.
[0013] Optionally, the inner wall of the protection cavity is further provided with at least two second position-limiting members, and the at least two second position-limiting members are arranged at intervals along the length direction of the protection cavity so as to abut against the opposite end surfaces of the fuse respectively.
[0014] In a second aspect, a circuit board is provided, comprising a substrate, a fuse arranged on the substrate and the above-mentioned insulating protective cover, wherein the insulating protective cover is sleeved on the fuse.
[0015] In a third aspect, an electrical device is provided, comprising the above-mentioned circuit board.
[0016] The beneficial effects of the insulating protective cover provided by the present application are: since the insulating protective cover is arranged on the periphery of the fuse, the insulating protective cover can insulate the fuse from other components, thereby achieving effective insulation between the fuse and other components, which can reduce the spacing distance between the fuse and the components, thereby helping to reduce the overall size of the circuit board and electrical equipment; in addition, the insulating protective cover is directly connected to the fuse, and the insulating protective cover can be connected and fixed to the fuse to achieve a stable connection with the fuse, reducing the risk of the insulating protective cover falling off due to vibration, thereby improving the insulating protection effect of the insulating protective cover. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0018] Figure 1 A schematic diagram of an insulating protective cover provided in an embodiment of the present application;
[0019] Figure 2 for Figure 1 Another perspective schematic diagram of the insulating protective cover shown;
[0020] Figure 3 for Figure 1 A schematic diagram of another perspective of the insulating protective cover shown;
[0021] Figure 4 for Figure 1 A schematic diagram of another perspective of the insulating protective cover shown;
[0022] Figure 5 A schematic diagram of an insulating protective cover and a fuse provided in an embodiment of the present application;
[0023] Figure 6 for Figure 5 Another perspective diagram of the insulating protective cover and the fuse shown;
[0024] Figure 7 An internal schematic diagram of an electrical device provided in an embodiment of the present application;
[0025] Figure 8 for Figure 7 Enlarged view of point A in the figure.
[0026] Among them, the reference numerals in the figure are:
[0027] 1. Insulating protective cover; 11. First cover body; 111. First stopper; 1111. Stopper surface; 1112. Guide slope; 112. Heat dissipation hole; 113. Notch; 114. Second reinforcing rib; 12. Second cover body; 121. First connecting plate; 122. Second connecting plate; 123. First reinforcing rib; 124. Second stopper; 125. Heat dissipation gap; 101. Protective cavity; 1011. First chamber; 1012. Second chamber; 1013. First inner wall; 1014. Second inner wall; 102. Installation opening;
[0028] 2. Fuse tube; 21. Insulation tube clamp; 22. Electrode connecting tube;
[0029] 3. Circuit board. DETAILED DESCRIPTION
[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following Figures 1 to 8 It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0034] In the related art, insulation protection treatment is required between components and fuses. One common treatment method is to increase the distance between components and fuses to achieve protection in a spatial spacing manner. However, this layout method occupies a large area and is not conducive to reducing the size of electrical equipment. Another method is to place insulating paper around the fuse, but when the electrical equipment is transported and powered on, there will be a certain degree of vibration, and the insulating paper is easy to shift or even fall off, resulting in poor stability and reliability of the electrical equipment.
[0035] Therefore, the present application provides an insulating protective cover to solve the above problems.
[0036] Please also read Figures 1 to 5 , the insulating protective cover 1 provided in the embodiment of the present application is now described. The insulating protective cover 1 is used to connect with the fuse tube 2, and a protective cavity 101 is provided inside the insulating protective cover 1. The protective cavity 101 is used to accommodate the fuse tube 2, so that the insulating protective cover 1 can be sleeved on the outer periphery of the fuse tube 2. The peripheral side of the insulating protective cover 1 is provided with an installation opening 102, which is connected to the protective cavity 101, and the installation opening 102 is used for the fuse tube 2 to enter the protective cavity 101.
[0037] Since the insulating protective cover 1 is arranged on the outer periphery of the fuse tube 2, the insulating protective cover 1 can insulate the fuse tube 2 from other components, thereby achieving effective insulation between the fuse tube 2 and other components, which can reduce the spacing distance between the fuse tube 2 and the components, thereby helping to reduce the overall size of the circuit board 3 and the electrical equipment; in addition, the insulating protective cover 1 is directly connected to the fuse tube 2, and the insulating protective cover 1 is fixed on the fuse tube 2 to achieve a stable connection with the fuse tube 2, reducing the risk of the insulating protective cover 1 falling off due to vibration, thereby improving the insulating protection effect of the insulating protective cover 1.
[0038] In this embodiment, the insulating protective cover 1 is a plastic part. In other embodiments, the insulating protective cover 1 can also be made of other insulating materials, such as rubber, silicone, etc.
[0039] In some embodiments, the side wall of the installation opening 102 is provided with a first stopper 111, and the first stopper 111 is used to cooperate with the peripheral side surface of the fuse tube 2 to connect the insulation protection cover 1 and the fuse tube 2. The first stopper 111 is arranged at the installation opening 102, which can reduce the local width of the installation opening 102, thereby limiting the fuse tube 2. When the insulation protection cover 1 is sleeved on the fuse tube 2, that is, the fuse tube 2 is located in the protection cavity 101, the first stopper 111 can limit the movement of the fuse tube 2, thereby reducing the probability of the fuse tube 2 falling off the insulation protection cover 1 from the installation opening 102; the first stopper 111 cooperates with the peripheral side surface of the fuse tube 2 to form a limit, and the shape of the fuse tube 2 itself can be used to design the structure of the first stopper 111, so that the first stopper 111 can adapt to the shape of the fuse tube 2, and no additional modification is required to the structure of the fuse tube 2, so that the insulation protection cover 1 can be applicable to the fuse tube 2 on the market, thereby improving the versatility of the insulation protection cover 1.
[0040] In this embodiment, the insulating protective cover 1 is detachably connected to the fuse tube 2 via the first limiting member 111 . The connection structure between the fuse tube 2 and the insulating protective cover 1 is simple, and the assembly and disassembly is convenient and the operation is simple.
[0041] In some embodiments, reference Figure 3 The first limiting member 111 is provided with a limiting surface 1111, the limiting surface 1111 faces the center of the protective cavity 101, the limiting surface 1111 and the inner wall of the protective cavity 101 are respectively used to abut against the peripheral side surface of the fuse tube 2, that is, when the fuse tube 2 is located in the protective cavity 101, the peripheral side surface of the fuse tube 2 abuts against the limiting surface 1111 and the inner wall of the protective cavity 101, so as to prevent the fuse tube 2 from being damaged. Figure 3 The inner wall of the protective cavity 101 abuts against the peripheral side surface of the lower half of the fuse tube 2, and the limiting surface 1111 abuts against the peripheral side surface of the upper half of the fuse tube 2.
[0042] The limiting surface 1111 of the first limiting member 111 can form a larger contact range with the peripheral side surface of the fuse tube 2. For example, when the limiting surface 1111 is a plane, the limiting surface 1111 can be tangent to the peripheral side surface of the fuse tube 2 to form a line contact. When the limiting surface 1111 is an arc surface, the limiting surface 1111 can form a surface contact with the peripheral side surface of the fuse tube 2. Compared with point contact, the line contact and surface contact ranges are larger, thereby making the interaction force between the insulating protective cover 1 and the fuse tube 2 more uniform, thereby improving the connection stability of the insulating protective cover 1 and the fuse tube 2.
[0043] In some embodiments, reference Figures 3 to 5 The two opposite side walls of the mounting opening 102 on the insulating protective cover 1 along the width direction (the Y direction in the figure) are both provided with first limiting members 111, and the limiting surfaces 1111 of the two first limiting members 111 are respectively used to abut against the peripheral side surfaces of the fuse tube 2 to cooperate in clamping the fuse tube 2.
[0044] In this way, the two first limiting members 111 can provide limiting from the opposite sides of the fuse tube 2, balance the forces on both sides of the fuse tube 2, and improve the installation stability of the insulating protective cover 1 and the fuse tube 2; in this embodiment, the first limiting member 111 is an elastic arm structure with a certain elastic deformation ability. When the insulating protective cover 1 and the fuse tube 2 are installed, the first limiting member 111 is squeezed by the fuse tube 2 and moves outward, so that the insulating protective cover 1 can be inserted into the protective cavity 101 between the two first limiting members 111, so that the insulating protective cover 1 can be sleeved on the outer periphery of the fuse tube 2, and then the first limiting member 111 is reset, and the limiting surface 1111 of the first limiting member 111 presses the peripheral side surface of the fuse tube 2 tightly.
[0045] It can be understood that the two first limit members 111 can produce elastic deformation when squeezed. The first limit members 111 are arranged on the two opposite side walls of the installation opening 102, which can reduce the deformation amplitude of the single first limit member 111 and reduce the risk of the first limit member 111 breaking due to excessive deformation during the installation process.
[0046] The first limiter 111 is arranged in the middle area of the protective cavity 101 along the length direction (Z direction as shown in the figure), so that the first limiter 111 can be closer to the center of the protective cavity 101, that is, the first limiter 111 is closer to the center of the insulating protective cover 1. When the insulating protective cover 1 is sleeved on the fuse tube 2, the first limiter 111 is also closer to the central area of the fuse tube 2. In this way, the interaction force between the insulating protective cover 1 and the fuse tube 2 can be made more uniform, thereby further improving the connection stability between the two.
[0047] In a specific embodiment, the fuse tube 2 includes an electrode connecting tube 22, a melt and an insulating tube clamp 21. The melt is made of metal and is arranged in the insulating tube clamp 21. The insulating tube clamp 21 can be made of ceramic. Two electrode connecting tubes 22 are arranged. The two electrode connecting tubes 22 are located at both ends of the insulating tube clamp 21, and the two electrode connecting tubes 22 are respectively connected to the two ends of the melt; the first limit member 111 cooperates with the peripheral side surface of the insulating tube clamp 21, and the minimum distance between the two first limit members 111 is L1. The diameter of the insulating tube clamp 21 of the fuse tube 2 is D, and L1<D.
[0048] Since the minimum distance L1 between the two first limiting members 111 is smaller than the diameter D of the insulating tube clamp 21 of the fuse tube 2, when the insulating protective cover 1 is installed on the fuse tube 2, the circumferential side surface of the insulating tube clamp 21 of the fuse tube 2 will squeeze the two first limiting members 111, causing the two first limiting members 111 to move outward respectively, thereby increasing the distance between the two first limiting members 111, and further allowing the insulating tube clamp 21 of the fuse tube 2 to break through the restriction of the two first limiting members 111 and enter the protective cavity 101.
[0049] In some embodiments, reference Figure 3 The first limiting member 111 also has a guiding inclined surface 1112 arranged opposite to the limiting surface 1111 . The guiding inclined surfaces 1112 on the two first limiting members 111 are arranged in a trumpet shape to guide the fuse 2 to move into the protective cavity 101 .
[0050] In this embodiment, the guiding inclined surfaces 1112 on the two first stoppers 111 are arranged in a trumpet shape, that is, the ends of the two guiding inclined surfaces 1112 that are closer to each other are arranged close to the center of the insulating protective cover 1, and the ends of the two guiding inclined surfaces 1112 that are farther apart from each other are away from the center of the insulating protective cover 1; it can be understood that since the distance L1 between the two first stoppers 111 is smaller than the diameter D of the insulating tube clamp 21 of the fuse 2, the two first stoppers 111 need to move outward during the installation of the insulating protective cover 1; the guiding surfaces 1112 are arranged on the first stoppers 111. Inclined surface 1112, the two guiding inclined surfaces 1112 are arranged in a trumpet shape. On the one hand, during the installation and clamping process of the insulating protective cover 1 and the fuse tube 2, the squeezing of the guiding inclined surfaces 1112 by the fuse tube 2 can also prompt the first limiting member 111 to move outward, thereby increasing the distance between the two first limiting members 111, so that the fuse tube 2 can pass through the installation opening 102 and enter the protective cavity 101, so that the insulating protective cover 1 is installed on the fuse tube 2; on the other hand, the guiding inclined surfaces 1112 can play a guiding and positioning role, thereby facilitating the positioning of the insulating protective cover 1 and the fuse tube 2 and reducing the difficulty of installation and positioning.
[0051] In this embodiment, the first limiting member 111 is in a buckle shape.
[0052] Reference Figure 4 In this embodiment, the side wall of the installation opening 102 is recessed to form a notch 113, the notch 113 is directly opposite to the insulating tube clamp 21 of the fuse tube 2, and the first stopper 111 is disposed in the notch 113. Figure 4As illustrated in the direction shown, the setting of the notch 113 can reduce the distance between the first limit member 111 and the lowest point of the insulating protective cover 1 in the X direction, so that the distance L1 between the two first limit members 111 can be close to the diameter D of the insulating tube clamp 21 of the fuse tube 2, thereby reducing the deformation amplitude of the two first limit members 111 during installation. On the one hand, it can reduce the difficulty of installation operation, and on the other hand, it can reduce the risk of breakage of the first limit member 111 due to excessive deformation during installation.
[0053] Of course, in some other embodiments, the insulating protective cover 1 may also be provided with only one first limiting member 111 , and the first limiting member 111 limits the fuse 2 from a single side.
[0054] Of course, in other embodiments, the first limiting member 111 of the above structure may not be provided on the insulating protective cover 1. For example, the insulating protective cover 1 is provided as a tubular structure, and an installation opening 102 is provided on the peripheral side of the tubular structure. By controlling the central angle corresponding to the installation opening 102 to be less than 180°, the width of the installation opening 102 is made smaller than the diameter of the fuse tube 2, and the fuse tube 2 is restricted in the protective cavity 101 by the inner wall of the protective cavity 101. At this time, the inner wall of the protective cavity 101 corresponds to a limiting member for restricting the movement of the fuse tube 2. For another example, the width of the protective cavity 101 can also be made smaller. When the insulating protective cover 1 is sleeved on the fuse tube 2, that is, the fuse tube 2 is located in the protective cavity 101, the inner wall of the protective cavity 101 can clamp the fuse tube 2 from both sides. At this time, the inner wall of the protective cavity 101 corresponds to a limiting member for restricting the movement of the fuse tube 2.
[0055] In this embodiment, the fuse tube 2 includes an electrode connecting tube 22, a melt and an insulating tube clamp 21. The melt is made of metal and is arranged in the insulating tube clamp 21. The insulating tube clamp 21 can be made of ceramic. Two electrode connecting tubes 22 are provided. The two electrode connecting tubes 22 are located at both ends of the insulating tube clamp 21, and the two electrode connecting tubes 22 are respectively connected to the two ends of the melt. The diameter of the electrode connecting tube 22 is greater than the diameter of the insulating tube clamp 21. Corresponding to the structure of the fuse tube 2, the insulating protective cover 1 is also divided into three parts. The insulating protective cover 1 has a first cover body 11 and two second cover bodies 12 connected to each other. The two second cover bodies 12 are respectively located in the first cover body 1 1, correspondingly, the protective cavity 101 includes a first chamber 1011 and two second chambers 1012 connected to each other, the first chamber 1011 is located in the first cover body 11, the second chamber 1012 is located in the second cover body 12, the first chamber 1011 and the second chamber 1012 are both connected to the installation opening 102, the first cover body 11 is arranged on the periphery of the insulating tube clamp 21, that is, the insulating tube clamp 21 is arranged in the first chamber 1011, the second cover body 12 is arranged on the periphery of the electrode connecting tube 22, that is, the electrode connecting tube 22 is arranged in the second chamber 1012, and the two second chambers 1012 are respectively used to accommodate two electrode connecting tubes 22.
[0056] In this embodiment, the insulating protective cover 1 is integrally formed. In other embodiments, the first cover body 11 and the second cover body 12 may be formed separately and then connected by gluing or other methods.
[0057] In this embodiment, the notch 113 is arranged on the first cover body 11 of the insulating protective cover 1, and the notch 113 is directly opposite to the insulating tube clamp 21 of the fuse tube 2, so that the notch 113 can be spaced from the electrode connecting tube 22 of the fuse tube 2, and the electrode connecting tube 22 of the fuse tube 2 will not be exposed, thereby ensuring the insulating protection effect of the insulating protective cover 1.
[0058] During the power-on process, the fuse 2 will generate heat. If the current in the circuit is too large, the temperature of the fuse 2 will rise sharply, and the fuse in the fuse 2 will melt, causing the circuit to be broken, thereby achieving overload protection for circuit components.
[0059] It is understandable that if there is a problem with the heat dissipation of the fuse tube 2, an unexpected situation may occur where the current does not reach the threshold value and the fuse in the fuse tube 2 melts.
[0060] In some embodiments, in order to reduce the temperature rise effect of the insulating protective cover 1 on the fuse 2, refer to Figure 1 and Figure 2 The protective cavity 101 includes a first chamber 1011 and two second chambers 1012 connected to each other. The first chamber 1011 is located between the two second chambers 1012. The first chamber 1011 and the second chamber 1012 are both connected to the installation opening 102. The first chamber 1011 is used to accommodate the insulating tube clamp 21 of the fuse 2. The two second chambers 1012 are respectively used to accommodate two electrode connecting tubes 22 of the fuse 2. The inner wall of the first chamber 1011 is provided with a heat dissipation hole 112 penetrating the insulating protective cover 1, that is, the first cover body 11 of the insulating protective cover 1 is provided with a penetrating heat dissipation hole 112. The heat dissipation hole 112 is set on the first cover body 11, and the electrode connecting tube 22 on the fuse tube 2 will not be exposed from the heat dissipation hole 112, thereby ensuring the insulation protection effect of the insulating protective cover 1; the setting of the heat dissipation hole 112 can make the insulating tube clamp 21 of the fuse tube 2 exposed, and the heat generated on the fuse tube 2 can be transferred to the external environment through the heat dissipation hole 112, reducing the temperature rise effect of the insulating protective cover 1 on the fuse tube 2.
[0061] There may be multiple heat dissipation holes 112, which can reduce the area of the insulating tube clamp 21 covered by the first cover 11, thereby increasing the effective heat dissipation area of the insulating tube clamp 21. In this embodiment, there are two heat dissipation holes 112, the lengths of the two heat dissipation holes 112 extend along the length direction of the fuse tube 2, and the two heat dissipation holes 112 are arranged at intervals along the circumferential direction of the fuse tube 2. In other embodiments, the two heat dissipation holes 112 can also be arranged at intervals along the length direction of the fuse tube 2, so that the length of the heat dissipation holes 112 can extend along the circumferential direction of the fuse tube 2.
[0062] In some embodiments, reference Figure 6 The inner wall of the first chamber 1011 is an arc surface, and the inner wall of the first chamber 1011 fits with the insulating tube clamp 21. The inner wall of the first chamber 1011 fits with the insulating tube clamp 21 of the fuse tube 2, and a surface contact can be formed between the inner wall of the protective cavity 101 and the fuse tube 2, so that the size of the insulating protective cover 1 can fit the size of the fuse tube 2, reducing the risk of the insulating protective cover 1 and the fuse tube 2 falling off due to looseness.
[0063] In this embodiment, refer to Figure 6 , the inner wall of the second chamber 1012 is spaced from the outer surface of the electrode connecting tube 22 to form a heat dissipation gap 125. The insulating protective cover 1 needs to cover the electrode connecting tube 22 to form an insulating protection, so a hole structure cannot be set on the second cover body 12 for heat dissipation. In this embodiment, the inner wall of the second chamber 1012 in the second cover body 12 is spaced from the outer surface of the electrode connecting tube 22 to form a heat dissipation gap 125, and the heat generated by the electrode connecting tube 22 when it is energized can be transferred to the external environment through the heat dissipation gap 125, thereby reducing the accumulation of heat in the fuse tube 2, reducing the influence of the insulating protective cover 1 on the heat dissipation of the fuse tube 2, and reducing the accidental situation that the current does not reach the threshold and the fuse tube 2 is blown.
[0064] Reference Figures 1 to 3 The second cover body 12 includes a first connecting plate 121 and two second connecting plates 122. The first connecting plate 121 and the second connecting plates 122 are arranged along the circumferential direction of the fuse tube 2. The two second connecting plates 122 are connected through the first connecting plate 121, that is, the cross-section of the second cover body 12 is C-shaped. The first connecting plate 121 is provided with a first inner wall 1013 of the second chamber 1012, and the second connecting plate 122 is provided with a second inner wall 1014 of the second chamber 1012. The two second inner walls 1014 are connected through the first inner wall 1013. The plate-shaped first connecting plate 121 is tangent to the electrode connecting tube 22 of the tubular fuse tube 2, that is, the first inner wall 1013 is tangent to the electrode connecting tube 22 of the fuse tube 2. The heat dissipation gap 125 is located in the angle area formed by the first connecting plate 121 and the second connecting plate 122 and in the interval area between the second inner wall 1014 and the electrode connecting tube 22.
[0065] In this embodiment, an angle θ is formed between the first inner wall 1013 and the second inner wall 1014, and θ is an obtuse angle. Figure 3 Take this as an example to illustrate: Figure 3 The X direction (i.e., the height direction of the insulating protective cover 1) is a straight line direction perpendicular to the first inner wall 1013, the fuse 2 and the insulating protective cover 1 are buckled and installed along the X direction, and θ is set to be an obtuse angle. The two second connecting plates 122 are horn-shaped, so that the distance between the two second connecting plates 122 away from the first connecting plate 121 is, that is, Figure 3 The marked distance L2 is greater than the diameter of the fuse tube 2 (electrode connecting tube 22), which can reduce the difficulty of alignment between the fuse tube 2 and the insulating protective cover 1, making it easier for the fuse tube 22 to enter the insulating protective cover 1, and facilitating the installation between the insulating protective cover 1 and the fuse tube 2. In one embodiment, the insulating protective cover 1 can be manufactured by injection molding. Then, by setting θ to an obtuse angle, the molding mold can have a certain draft angle, making the insulating protective cover 1 easier to demold, facilitating the separation of the insulating protective cover 1 from the molding mold, and reducing the processing difficulty of the insulating protective cover 1.
[0066] In a specific embodiment, the angle θ may be 91°, 92°, etc.
[0067] Reference Figure 2 The inner wall of the second chamber 1012 is protrudingly provided with a first reinforcing rib 123, and the first reinforcing rib 123 is spaced apart from the outer surface of the electrode connecting tube 22. In this embodiment, the first reinforcing rib 123 is located in the angle area formed by the first connecting plate 121 and the second connecting plate 122, and the first reinforcing rib 123 is respectively connected to the first inner wall 1013 of the first connecting plate 121 and the second inner wall 1014 of the second connecting plate 122, and the first reinforcing rib 123 can provide strength support for the first connecting plate 121 and the second connecting plate 122.
[0068] Reference Figure 1 The outer side surface of the first cover body 11 is protrudingly provided with a second reinforcing rib 114, and both ends of the second reinforcing rib 114 extend to connect with the second cover body 12. The second reinforcing rib 114 connects the first cover body 11 and the second cover body 12, and the second reinforcing rib 114 increases the local thickness of the insulating protective cover 1, which can further improve the overall strength of the insulating protective cover 1 and reduce the deformation of the insulating protective cover 1 during the installation process, thereby facilitating the installation operation, and the second reinforcing rib 114 protrudes from the surface of the first cover body 11, and the second reinforcing rib 114 can be used as a force application point for installing and removing the insulating protective cover 1.
[0069] In some embodiments, reference Figure 3 and Figure 6The inner wall of the protective cavity 101 is also provided with at least two second limit members 124, and the at least two second limit members 124 are spaced apart along the length direction (Z direction in the figure) of the protective cavity 101, so as to respectively abut against the opposite end faces of the fuse 2, that is, the inner walls of the two second cover bodies 12 of the insulating protective cover 1 are both protrudingly provided with second limit members 124, and the side faces of the second limit members 124 are in contact with the end faces of the fuse 2.
[0070] In this embodiment, connecting structures are also provided at both ends of the fuse tube 2, and the connecting structures are used to connect the circuit. Therefore, the second cover body 12 cannot cover the end of the fuse tube 2, and the second limiter 124 is small in size and will not form a large-scale blockage on the end of the fuse tube 2, so the connecting structure at the end of the fuse tube 2 will not be squeezed; the second limiter 124 and the end face of the fuse tube 2 form a contact positioning, so that the insulating protective cover 1 and the fuse tube 2 will not be offset in the length direction, that is, it is ensured that the electrode connecting tube 22 of the fuse tube 2 is located in the second cover body 12 of the insulating protective cover 1, and it is ensured that the insulating tube clamp 21 of the fuse tube 2 is located in the first cover body 11 of the insulating protective cover 1, thereby reducing the exposure of the electrode connecting tube 22 of the fuse tube 2 from the heat dissipation hole 112 of the first cover body 11, and ensuring the insulating protection effect of the insulating protective cover 1.
[0071] For example, refer to Figure 3 and Figure 4 In this embodiment, the distance L1 between the two first limit members 111 on the insulating protective cover 1 can be in the range of 12mm-13mm, the overall width L3 of the insulating protective cover 1 can be in the range of 21mm-22mm, the height L4 of the insulating protective cover 1 can be in the range of 19mm-21mm, and the length L5 can be in the range of 53mm-54mm; for example, the distance L1 between the two first limit members 111 on the insulating protective cover 1 can be 12.7mm, the overall width L3 of the insulating protective cover 1 can be 21.35mm, the height L4 of the insulating protective cover 1 can be 20mm, and the length L5 can be 53.35mm.
[0072] The present application also provides a circuit board 3, which includes a substrate, a fuse 2 arranged on the substrate, and an insulating protective cover 1 in any of the above embodiments. The insulating protective cover 1 is sleeved on the fuse 2 so that the fuse 2 is located in a protective cavity 101 of the insulating protective cover 1. The insulating protective cover 1 can insulate and isolate the fuse 2 from components on the circuit board 3, so that the circuit layout design on the circuit board 3 can be more compact, thereby reducing the overall size of the circuit board 3.
[0073] The present application also provides an electrical device, Figure 7 and Figure 8It is a schematic diagram of an electrical device, which includes the circuit board 3 in the above embodiment, the fuse 2 is arranged on the circuit board 3, and the fuse 2 is electrically connected to the circuit on the circuit board 3, and a number of components are also arranged on the circuit board 3. Since the insulating protective cover 1 can wrap the fuse 2 to achieve insulation spacing, the circuit layout in the electrical device can be designed to be more compact, thereby reducing the overall size of the electrical device and its occupied area. Since the insulating protective cover 1 can be fixed on the fuse 2, the insulating protective cover 1 and the fuse 2 can be stably connected, which can ensure the insulation protection effect of the insulating protective cover 1 and improve the safety of the electrical device.
[0074] For example, the electrical device of this embodiment may be a UPS (Uninterruptible Power Supply). Figure 7 and Figure 8 The application scenario shown includes two relatively arranged circuit boards 3, both of which are provided with components and fuses 2. The two circuit boards 3 are arranged in a buckled manner, and the space between the two circuit boards 3 is narrow. The circuit board 3 located on the upper part will be slightly deformed due to its own weight. The distance between the components of the two circuit boards 3 and the fuses 2 does not meet the spatial insulation spacing conditions. Therefore, it is necessary to install an insulating protective cover 1 on the fuse 2 to achieve insulation protection for the entire circuit and effectively reduce the probability of safety accidents.
[0075] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. An insulating protective cover, characterized in that: The insulating protective cover is used to be connected to the fuse tube. A protective cavity is arranged inside the insulating protective cover. The protective cavity is used to accommodate the fuse tube. The insulating protective cover is provided with an installation opening connected to the protective cavity. The installation opening is used for the fuse tube to enter the protective cavity.
2. The insulating protective cover according to claim 1, characterized in that: The side wall of the installation opening is provided with a first limiting member, and the first limiting member is used to cooperate with the peripheral side surface of the fuse tube to connect the insulating protective cover and the fuse tube.
3. The insulating protective cover according to claim 2, characterized in that: The first limiting member has a limiting surface arranged toward the center of the protection cavity, and the limiting surface and the inner wall of the protection cavity are respectively used to abut against the peripheral side surface of the fuse.
4. The insulating protective cover according to claim 3, characterized in that: The first limiting members are respectively arranged on two opposite side walls of the installation opening along the width direction, and the limiting surfaces of the two first limiting members are respectively used to abut against the peripheral side surfaces of the fuse tube to cooperate and clamp the fuse tube.
5. The insulating protective cover according to claim 4, characterized in that: The first limiting member further has a guiding inclined surface arranged opposite to the limiting surface, and the guiding inclined surfaces on the two first limiting members are arranged in a trumpet shape to cooperate and guide the fuse to move into the protective cavity.
6. The insulating protective cover according to claim 2, characterized in that: The first limiting member is arranged in a middle area of the protective cavity along the length direction.
7. The insulating protective cover according to any one of claims 1 to 6, characterized in that: The protective cavity includes a first chamber and two second chambers connected to each other, the first chamber is located between the two second chambers, the first chamber and the second chamber are both connected to the installation opening, the first chamber is used to accommodate the insulating tube clamp of the fuse, and the two second chambers are respectively used to accommodate two electrode connecting tubes of the fuse, and the inner wall of the first chamber is provided with heat dissipation holes that penetrate the insulating protective cover.
8. The insulating protective cover according to any one of claims 1 to 6, characterized in that: The inner wall of the protection cavity is further provided with at least two second position-limiting members, and the at least two second position-limiting members are arranged at intervals along the length direction of the protection cavity so as to abut against the opposite end surfaces of the fuse tube respectively.
9. A circuit board, comprising a substrate and a fuse arranged on the substrate, characterized in that: The circuit board also includes an insulating protective cover as described in any one of claims 1 to 8, and the insulating protective cover is sleeved on the fuse.
10. An electrical device, characterized in that: Comprising the circuit board as claimed in claim 9.