Small overload protector
By using a staggered terminal structure and a quick-installation mechanism, the problem of uneven welding of small overload protectors in confined spaces is solved, enabling convenient wiring and stable connection, and improving the mechanical strength of the welding points and circuit safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-03-20
AI Technical Summary
Existing small overload protectors have problems with welding operations. Because the terminals and wires are on the same plane, the welding operation space is small, which leads to uneven distribution of solder, which can easily cause poor welding and slag inclusion, reducing the mechanical strength and conductivity of the weld. At the same time, the wiring operation is complicated and not easy to perform in a confined space.
A small overload protector was designed, which adopts a staggered terminal structure and a quick-installation mechanism. It cuts off the current through the electromagnetic force of the compression block and spring, and uses thermofusion connection technology to ensure a stable connection of the protective housing.
It enables convenient wiring and soldering in confined spaces, improves the mechanical strength and conductivity of the solder joints, and ensures the safety and stability of the circuit and the rapid installation of the device.
Smart Images
Figure CN224020688U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to overload protector technical field especially relates to small overload protector. BACKGROUND
[0002] Small overload protector is a kind of small device for protecting electrical equipment from overload damage, and small overload protector works based on thermal effect or electromagnetic effect, when the current in the circuit exceeds the set overload current value, the heating element inside the overload protector will generate excessive heat due to excessive current, causing bimetallic strip to be deformed by heat, or through electromagnetic induction principle, make electromagnetic mechanism action, this deformation or action will trigger the release mechanism of protector, thereby cutting off the circuit, prevent current continues to pass through, reach the purpose of protecting equipment.
[0003] When flush wiring, if the clamping force of terminal is insufficient or is affected by vibration for a long time, the contact between wire and terminal is easy to loosen, when installing, wire needs to be accurately inserted into terminal and ensure flush, operation is relatively complex, especially in small space, construction difficulty is greater, the prior art can use special wiring tool when installing, ensure the depth and position accuracy of wire inserted into terminal, improve wiring efficiency and quality, for small space, small or flexible wiring tool can be used, convenient operation, but in actual use, since terminal and wire are in the same plane, welding operation space is relatively small, not conducive to uniform distribution and penetration of solder, and virtual welding, slag inclusion welding defects can occur, reduce the mechanical strength and conductive performance of welding point. UTILITARIAN CONTENT
[0004] In order to make up for the above shortcomings, the utility model provides small overload protector, aims at improving the prior art in the same plane due to terminal and wire, welding operation space is relatively small, not conducive to uniform distribution and penetration of solder, and virtual welding, slag inclusion welding defects can occur, reduce the mechanical strength and conductive performance of welding point.
[0005] In order to achieve the above object, the utility model discloses the following technical scheme: Small overload protector, including protection shell one, the rear side of protection shell one is provided with protection shell two, the inside rear side left end of protection shell two is fixedly connected with the fixed frame, the bottom of fixed frame is fixedly connected with terminal no.
[0006] As a further description of the above technical scheme:
[0007] The installation mechanism includes a plurality of clamping blocks, and the adjacent clamping blocks are fixedly connected around the outer wall of the protection shell one.
[0008] As a further description of the above technical scheme:
[0009] The top of the extrusion column is fixedly connected with a connecting block, and the connecting block is designed in a round and smooth manner.
[0010] As a further description of the above technical scheme:
[0011] The inside rear side bottom end of the protection shell one is provided with a positioning groove, and the inside rear side bottom end of the protection shell two is fixedly connected with a positioning plate.
[0012] As a further description of the above technical scheme:
[0013] The outer diameter of the positioning plate is smaller than the inner diameter of the positioning groove, and the positioning plate corresponds to the position of the positioning groove.
[0014] As a further description of the above technical scheme:
[0015] The outer wall of the protection shell one and the protection shell two is designed in a chamfered manner, and the size of the protection shell one and the protection shell two is equal.
[0016] As a further description of the above technical scheme:
[0017] The inner diameter of the spring is greater than the outer wall diameter of the extrusion column, and the outer wall diameter of the spring is smaller than the diameter of the inside top of the protection shell one.
[0018] As a further description of the above technical solutions:
[0019] The plurality of clamping blocks are designed with equal distances, and the outer walls of the plurality of clamping blocks are matched with the interiors of the clamping grooves.
[0020] The utility model has the advantages of the following:
[0021] 1. In the utility model, when the current is too large, the strong electromagnetic force generated by the large current at the extrusion block overcomes the elastic force of the elastic plate, so that the extrusion block is pressed down and contacts another extrusion block, and then the two are repelled by the electromagnetic force, the current path is cut off, the power is cut off, the extrusion block is pressed down, the extrusion column is lifted, the top spring is compressed and stored, and after the current is normal, the spring force resets the components, terminal one and terminal two are misaligned, wiring and welding are facilitated, and the safety and stability of the circuit are ensured.
[0022] 2. In the utility model, the protection shell one is aligned with the protection shell two, the mounting plate of the protection shell two is pushed into the mounting groove of the protection shell one, the clamping block on the mounting plate can be accurately clamped into the corresponding clamping groove, the hot melting process is adopted, appropriate temperature and pressure are applied to the adjacent parts, the materials are melted and fused, the protection shells are tightly connected, and the protection shells are stable and reliable, so that the protection shell one and the protection shell two are quickly installed. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 A perspective view of a small overload protector is provided for the utility model;
[0024] Figure 2 A front view of a small overload protector is provided for the utility model;
[0025] Figure 3 A structure diagram of a fixing frame of a small overload protector is provided for the utility model;
[0026] Figure 4 A structure diagram of an extrusion column of a small overload protector is provided for the utility model;
[0027] Figure 5 A split view of a clamping block of a small overload protector is provided for the utility model.
[0028] LEGEND:
[0029] 1, protection shell one; 2, mounting mechanism; 201, mounting groove; 202, clamping block; 203, mounting plate; 204, clamping groove; 3, protection shell two; 4, fixing frame; 5, terminal one; 6, fixed plate; 7, elastic plate; 8, extrusion block one; 9, support frame; 10, extrusion block two; 11, terminal two; 12, extrusion column; 13, spring; 14, connecting block; 15, positioning groove; 16, positioning plate. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.
[0031] With reference to Figure 1 , Figure 3 and Figure 4 , the utility model provides an embodiment: small -size overload protector, including protection shell one 1, protection shell one 1's rear side is provided with protection shell two 3, the inside rear side left end of protection shell two 3 is fixedly connected with fixed frame 4, the bottom of fixed frame 4 is fixedly connected with terminal one 5, is used for wiring and welding, the top of fixed frame 4 is fixedly connected with fixed plate 6, the inside right side of fixed plate 6 is fixedly connected with elastic plate 7, the inside sliding connection of elastic plate 7 has extrusion block one 8, when extrusion block one 8 is extruded, extrusion block one 8 extrudes elastic plate 7, and elastic plate 7 will press down, the inside rear side of protection shell two 3 is fixedly connected with support frame 9, the top left side of support frame 9 is slidingly connected with extrusion block two 10, and extrusion block one 8 will meet extrusion block two 10 when pressing down, the bottom of support frame 9 is fixedly connected with terminal two 11, is used for wiring and welding, and terminal one 5 is staggered, the top of fixed plate 6 is provided with extrusion column 12, and extrusion column 12 will extrude extrusion block one 8, the top of extrusion column 12 is fixedly connected with spring 13, when extrusion column 12 rises, will extrude spring 13, when the current is too large, the current flows from terminal one 5 to extrusion block one 8, and extrusion block one 8 and extrusion block two 10 are opened by current, thereby power off, the outer wall of protection shell one 1 is provided with mounting mechanism 2, and mounting mechanism 2 is used for quickly installing protection shell one 1 and protection shell two 3;
[0032] Specifically, the rear side of the protective shell one 1 is provided with a protective shell two 3, the left end of the inner rear side of the protective shell two 3 is fixedly connected with a fixed frame 4, the bottom of the fixed frame 4 is provided with a terminal one 5 which is specially used for wiring and welding operation, and the top of the fixed frame 4 is fixedly connected with a fixed plate 6, the inner right side of the fixed plate 6 is connected with an elastic plate 7, the inside of the elastic plate 7 is slidably provided with a pressing block one 8, when the pressing block one 8 is extruded by external force, the elastic plate 7 will be forced to bend downward, the inner rear side of the protective shell two 3 is also fixedly connected with a support frame 9, the top left side of the support frame 9 is slidably connected with a pressing block two 10, once the pressing block one 8 is pressed downward by external force, the pressing block one 8 will be in contact with the pressing block two 10, the bottom of the support frame 9 is connected with a terminal two 11 which is also used for wiring and welding, and the position of the terminal two 11 is staggered with the terminal one 5, the top of the fixed plate 6 is provided with a pressing column 12 which can directly extrude the pressing block one 8, the top end of the pressing column 12 is connected with a spring 13, when the pressing column 12 rises, the spring 13 will be compressed, during the operation of the circuit, when the current is too large, the current will first flow from the terminal one 5 to the pressing block one 8, the excessive current will generate electromagnetic force, so that the pressing block one 8 and the pressing block two 10 are forced to open, thereby cutting off the circuit and realizing the function of power-off protection.
[0033] With reference to Figure 5 The mounting mechanism 2 comprises a plurality of clamping blocks 202, the adjacent clamping blocks 202 are fixedly connected around the outer wall of the protective shell one 1, the outer wall of the protective shell one 1 is provided with a mounting groove 201 around, the adjacent clamping blocks 202 are fixedly connected inside the rear side of the mounting groove 201, the protective shell two 3 is fixedly connected with a mounting plate 203 around, the inside of the plurality of mounting plates 203 is provided with a clamping groove 204, the protective shell one 1 is placed against the protective shell two 3, the mounting plate 203 will enter the inside of the mounting groove 201, the clamping block 202 will be clamped into the inside of the clamping groove 204, and then the protective shell one 1 and the protective shell two 3 adjacent to each other are connected by heat melting;
[0034] Specifically, the outer wall of the protective shell one 1 is uniformly provided with a plurality of mounting grooves 201, the inside rear side of each mounting groove 201 is fixedly connected with a plurality of clamping blocks 202 which are adjacent to each other, the clamping blocks 202 play a key role in positioning and connecting, and the four sides of the protective shell two 3 are respectively fixedly connected with mounting plates 203, the clamping groove 204 is formed in each mounting plate 203, when the protective shell one 1 and the protective shell two 3 need to be assembled, the protective shell one 1 is aligned with the protective shell two 3 and slowly pushed, at this time, the mounting plate 203 will gradually enter the inside of the mounting groove 201, with the progress of the mounting process, the clamping block 202 will be clamped into the clamping groove 204, so as to accurately complete the preliminary positioning, after the clamping block 202 and the clamping groove 204 are matched in place, the parts adjacent to each other of the protective shell one 1 and the protective shell two 3 are treated by heat melting connection process, so that the two are tightly combined into a stable whole, thereby ensuring the integrity and reliability of the structure of the device.
[0035] With reference toFigure 1 、 Figure 3 and Figure 5 The top of the extrusion column 12 is fixedly connected with a connecting block 14, the connecting block 14 is designed in a round and smooth manner, the inner rear bottom end of the protective shell one 1 is provided with a positioning groove 15, the inner rear bottom end of the protective shell two 3 is fixedly connected with a positioning plate 16, the positioning plate 16 can be inserted into the positioning groove 15, the outer diameter of the positioning plate 16 is smaller than the inner diameter of the positioning groove 15, and the positioning plate 16 corresponds to the position of the positioning groove 15;
[0036] Specifically, the connecting block 14 fixedly connected to the top of the extrusion column 12 is designed in a round and smooth manner, which can effectively avoid scratching and damaging other components or personnel, the inner rear bottom end of the protective shell one 1 is provided with the positioning groove 15, the inner rear bottom end of the protective shell two 3 is fixedly connected with the positioning plate 16, the positioning plate 16 can be inserted into the positioning groove 15, and the outer diameter of the positioning plate 16 is smaller than the inner diameter of the positioning groove 15, the positions of the two are accurately corresponding, which facilitates the quick and accurate positioning and assembly of the protective shell one 1 and the protective shell two 3, ensures the stability and fitting degree of the overall structure installation, and provides reliable protection for the normal operation of the equipment.
[0037] Referring to Figure 1 、 Figure 4 and Figure 5 The outer walls of the protective shell one 1 and the protective shell two 3 are designed in a chamfered manner to prevent injury, the sizes of the protective shell one 1 and the protective shell two 3 are equal, the inner diameter of the spring 13 is greater than the outer wall diameter of the extrusion column 12, the spring 13 can be taken out, the outer wall diameter of the spring 13 is smaller than the diameter of the inner top of the protective shell one 1 to prevent the spring 13 from falling, and the plurality of clamping blocks 202 are designed at equal intervals, and the outer walls of the plurality of clamping blocks 202 are matched with the interiors of the clamping grooves 204;
[0038] Specifically, the outer walls of the protective shell one 1 and the protective shell two 3 are designed in a chamfered manner to avoid injury to personnel or objects during use, the sizes of the two are equal, which is beneficial to mutual cooperation and assembly, the inner diameter of the spring 13 is greater than the outer wall diameter of the extrusion column 12, which facilitates the spring 13 to be sleeved on the extrusion column 12 and to be taken out; the outer wall diameter of the spring 13 is smaller than the diameter of the inner top of the protective shell one 1, which can prevent the spring 13 from falling, the plurality of clamping blocks 202 are distributed at equal intervals, and the outer walls are perfectly matched with the interiors of the clamping grooves 204, so that the connection between the components is more stable and accurate, and the stability and reliability of the overall structure are ensured.
[0039] Working principle: under normal circumstances, the current flows from the terminal 5 at the bottom of the inner fixed frame 4 of the protective shell 2, and passes through the connected extrusion block 8, and the current continues to pass, once the current in the circuit is too large, the large current flowing into the extrusion block 8 will generate a strong electromagnetic force, since the extrusion block 8 is connected with the elastic plate 7, the electromagnetic force will make the extrusion block 8 move downward against the elastic force of the elastic plate 7, when the extrusion block 8 is pressed to a certain extent, it will contact with the extrusion block 2 10 which is slidably connected to the top left side of the support frame 9, the electromagnetic force generated by the excessive current will further force the extrusion block 8 and the extrusion block 2 10 to quickly pop open, thereby cutting off the current path from the terminal 5 through the extrusion block 8 to the extrusion block 2 10, realizing the function of power-off protection, preventing damage to the equipment caused by excessive current, during the pressing process of the extrusion block 8, the extrusion column 12 associated with it will be pushed up, and the spring 13 connected to the top end of the extrusion column 12 will be compressed, storing elastic potential energy, when the current returns to normal, the elastic force of the spring 13 can also promote the reset of the extrusion column 12 and the extrusion block 8, preparing for the next overload protection, effectively ensuring the safe and stable operation of the circuit;
[0040] And when starting the assembly operation of the protective shell 1 and the protective shell 2, first of all, the protective shell 1 needs to be accurately aligned with the protective shell 2, and then the protective shell 1 is slowly pushed, in this process, the mounting plate 203 will be steadily inserted into the inside of the mounting groove 201, and as the mounting action goes deeper, the clamping block 202 will be accurately and accurately clamped into the corresponding clamping groove 204, after the clamping block 202 and the clamping groove 204 are perfectly matched, the hot melting connection process is adopted, the technicians will apply a certain temperature and pressure to the parts adjacent to each other of the protective shell 1 and the protective shell 2, so that the local material melts and fuses together, tightly combining into a stable and solid whole, ensuring the integrity and reliability of the device structure, and ensuring its stable operation in the subsequent use process, resisting various external forces and environmental influences.
[0041] Finally, it should be pointed out that: the above only describes the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A small overload protector, comprising a protective housing (1), characterized in that: A second protective shell (3) is provided on the rear side of the first protective shell (1). A fixing frame (4) is fixedly connected to the left rear side of the second protective shell (3). A terminal (5) is fixedly connected to the bottom of the fixing frame (4). A fixing plate (6) is fixedly connected to the top of the fixing frame (4). An elastic plate (7) is fixedly connected to the right side of the inside of the fixing plate (6). An extrusion block (8) is slidably connected to the inside of the elastic plate (7). A support frame (9) is fixedly connected to the rear side of the second protective shell (3). An extrusion block (10) is slidably connected to the top left side of the support frame (9). A terminal (11) is fixedly connected to the bottom of the support frame (9). An extrusion column (12) is provided on the top of the fixing plate (6). A spring (13) is fixedly connected to the top of the extrusion column (12). An installation mechanism (2) is provided on the outer wall of the first protective shell (1). The installation mechanism (2) is used to quickly install the first protective shell (1) and the second protective shell (3).
2. The miniature overload protector according to claim 1, characterized in that: The installation mechanism (2) includes multiple locking blocks (202), and each of the multiple locking blocks (202) is fixedly connected to the outer wall of the first protective shell (1). Each of the outer walls of the first protective shell (1) has an installation groove (201). Each of the multiple locking blocks (202) is fixedly connected to the rear side inside the installation groove (201). Each of the two protective shells (3) has an installation plate (203) fixedly connected to its perimeter, and each of the multiple installation plates (203) has a locking groove (204) inside its interior.
3. The miniature overload protector according to claim 1, characterized in that: A connecting block (14) is fixedly connected to the top of the extrusion column (12), and the connecting block (14) adopts a smooth design.
4. The miniature overload protector according to claim 1, characterized in that: The bottom rear side of the first protective shell (1) is provided with a positioning groove (15), and the bottom rear side of the second protective shell (3) is fixedly connected with a positioning plate (16).
5. The miniature overload protector according to claim 4, characterized in that: The outer diameter of the positioning plate (16) is smaller than the inner diameter of the positioning groove (15), and the positions of the positioning plate (16) and the positioning groove (15) correspond to each other.
6. The miniature overload protector according to claim 1, characterized in that: The outer walls of both the first protective shell (1) and the second protective shell (3) are chamfered, and the first protective shell (1) and the second protective shell (3) are of equal size.
7. The miniature overload protector according to claim 1, characterized in that: The inner diameter of the spring (13) is greater than the outer diameter of the extrusion column (12), and the outer diameter of the spring (13) is smaller than the diameter of the inner top of the protective shell (1).
8. The miniature overload protector according to claim 2, characterized in that: The multiple card blocks (202) are all designed with equal spacing, and the outer walls of the multiple card blocks (202) match the interior of the card slots (204).