Current transformer structure and electric energy meter
By connecting the magnetic core copper wire to the PCB substrate through the pin assembly, the problem of complex connection of existing current transformers is solved, realizing efficient production and stable connection of current transformers, and improving the production efficiency and quality of electricity meters.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-03-10
AI Technical Summary
The connection process of existing current transformers is complicated, resulting in low production efficiency and unstable quality, especially the connection speed between the magnetic core copper wire and the PCB substrate is slow and prone to misalignment.
The use of pin assemblies to connect the magnetic core copper wire to the PCB substrate simplifies the connection process. The hard connection between the pin assemblies and the PCB substrate ensures correct alignment, and the use of sealing colloids for protection enhances the stability and protection capability of the current transformer.
It simplifies the production process of current transformers, improves production efficiency and product quality, reduces the manufacturing cost of electricity meters, and enhances the protection performance and safety of current transformers.
Smart Images
Figure CN223986480U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electricity meter technology, and in particular to the structure of current transformer and electricity meter. Background Technology
[0002] Current transformers are widely used in measurement, protection, and control devices in power systems. Their function is to convert large currents into smaller currents proportionally for electrical measurement and monitoring.
[0003] Current transformers in existing electricity meters typically consist of a magnetic core copper wire and a PCB substrate. The magnetic core copper wire is connected to the PCB substrate via red and white wires. The red and white wires (red wire and white wire) need to be pre-processed to a specified length, requiring processes such as cutting, stripping, and soldering, which is complex. After the magnetic core copper wire is soldered to the red and white wires, the red and white wires need to be inserted into the casing in two separate steps, which is slow and requires twisting the red and white wires to prevent them from unraveling. The red and white wires are soldered to the substrate through holes separately, which is inconvenient for flexible wires, slows down the installation speed, and makes it easy for the red and white wires to be misaligned during soldering.
[0004] Therefore, there is an urgent need for a current transformer structure to solve the above-mentioned technical problems. Utility Model Content
[0005] One objective of this invention is to provide a current transformer structure that simplifies the connection process and improves production efficiency and the quality of the current transformer.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] The current transformer structure includes:
[0008] A housing, wherein a receiving cavity is provided within the housing;
[0009] A magnetic core copper wire is disposed within the receiving cavity, and the magnetic core copper wire has a first terminal and a second terminal.
[0010] A pin assembly, at least a portion of which is disposed within the receiving cavity, the pin assembly including a first pin and a second pin, wherein a first terminal is connected to the first pin and a second terminal is connected to the second pin;
[0011] A PCB substrate, wherein a first solder hole and a second solder hole are provided on the PCB substrate, the first pin can be inserted into the first solder hole, and the second pin can be inserted into the second solder hole.
[0012] Optionally, the current transformer structure further includes a sealing colloid that seals the opening of the receiving cavity.
[0013] Optionally, the sealing colloid is made of silicone or epoxy resin.
[0014] Optionally, the pin assembly further includes a first fixing member, wherein the first pin and the second pin are spaced apart on the first fixing member.
[0015] Optionally, the pin assembly further includes a second fixing member, which is spaced apart from the first fixing member, and both the first pin and the second pin pass through the second fixing member.
[0016] Optionally, the housing is provided with a first positioning groove and a second positioning groove, the first fixing member is embedded in the first positioning groove, and the second fixing member is embedded in the second positioning groove.
[0017] Optionally, the first terminal is soldered to the first pin, and the second terminal is soldered to the second pin.
[0018] Optionally, the housing is made of an insulating material.
[0019] Optionally, the outer wall of the housing is provided with reinforcing ribs.
[0020] Another objective of this invention is to provide an electricity meter that reduces production steps, lowers the manufacturing cost of the electricity meter, and improves the production efficiency of the electricity meter.
[0021] To achieve this objective, the present invention adopts the following technical solution:
[0022] An electricity meter, including the current transformer structure described above.
[0023] Beneficial effects:
[0024] The current transformer structure provided by this utility model uses a pin assembly to connect the magnetic core copper wire to the PCB substrate, eliminating the wire pre-forming step, simplifying the connection process, improving production efficiency, and the hard connection between the pin assembly and the PCB substrate has a foolproof and error-proof function, ensuring that the pin assembly and the PCB substrate are correctly connected, thus improving product quality. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the current transformer structure provided by this utility model;
[0026] Figure 2 This is a schematic diagram of the connection between the magnetic core copper wire and the pin assembly provided by this utility model;
[0027] Figure 3 This is a schematic diagram of the magnetic core copper wire and pin assembly provided by this utility model assembled inside the housing;
[0028] Figure 4 This is an exploded view of the current transformer structure provided by this utility model.
[0029] In the picture:
[0030] 100. Housing; 110. Receiving cavity; 120. First positioning groove; 130. Second positioning groove;
[0031] 200, Magnetic core copper wire; 210, First terminal; 220, Second terminal;
[0032] 300, Pin assembly; 310, First pin; 320, Second pin; 330, First fixing member; 340, Second fixing member;
[0033] 400. PCB substrate. Detailed Implementation
[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0038] This embodiment provides a current transformer structure, such as Figures 1-4 As shown, the current transformer structure includes a housing 100, a magnetic core copper wire 200, a pin assembly 300, and a PCB substrate 400. The housing 100 has a receiving cavity 110, and the magnetic core copper wire 200 is disposed in the receiving cavity 110. The magnetic core copper wire 200 has a first terminal 210 and a second terminal 220. At least a portion of the pin assembly 300 is disposed in the receiving cavity 110. The pin assembly 300 includes a first pin 310 and a second pin 320. The first terminal 210 is connected to the first pin 310, and the second terminal 220 is connected to the second pin 320. The PCB substrate 400 has a first solder hole and a second solder hole. The first pin 310 can be inserted into the first solder hole, and the second pin 320 can be inserted into the second solder hole. The first pin 310 and the second pin 320 are electrically connected to the PCB substrate 400, respectively.
[0039] The current transformer structure provided in this embodiment uses a pin assembly 300 to connect the magnetic core copper wire 200 to the PCB substrate 400, eliminating the wire pre-forming step, simplifying the connection process, and improving production efficiency. The hard connection between the pin assembly 300 and the PCB substrate 400 has a foolproof and error-proof function, ensuring that the pin assembly 300 and the PCB substrate 400 are correctly connected, thus improving product quality.
[0040] Optionally, the current transformer structure also includes a sealing colloid, which seals the opening of the receiving cavity 110, effectively preventing external environmental factors (such as moisture, dust, corrosive substances, etc.) from affecting the internal components of the current transformer, thereby improving its protection capability and extending the service life of the current transformer.
[0041] Optionally, the sealing compound may be made of silicone or epoxy resin. Silicone has excellent high-temperature resistance, cold resistance, and corrosion resistance, and can maintain good sealing performance under various environmental conditions, making it particularly suitable for high-temperature or harsh environments. Epoxy resin has strong mechanical properties and extremely high adhesion, which can effectively seal the receiving cavity 110, prevent external impurities from entering the receiving cavity 110, and further improve electrical insulation performance.
[0042] Optionally, such as Figure 2 and Figure 4As shown, the pin assembly 300 also includes a first fixing member 330, on which the first pin 310 and the second pin 320 are spaced apart. The first fixing member 330 can effectively maintain a fixed distance between the first pin 310 and the second pin 320, ensuring accurate positioning of the pins during installation and preventing displacement or deviation of the pins, thereby improving the stability and accuracy of the pin connection.
[0043] Optionally, such as Figure 2 and Figure 4 As shown, the pin assembly 300 also includes a second fixing member 340, which is spaced apart from the first fixing member 330. The first pin 310 and the second pin 320 both pass through the second fixing member 340, which further enhances the stability of the pin assembly 300 and can effectively reduce the risk of displacement or loosening of the first pin 310 and the second pin 320 due to vibration, thereby improving the vibration resistance and mechanical strength of the pin assembly 300.
[0044] Optionally, such as Figure 4 As shown, the housing 100 is provided with a first positioning groove 120 and a second positioning groove 130. The first fixing member 330 is embedded in the first positioning groove 120 and the second fixing member 340 is embedded in the second positioning groove 130, which can accurately position the first pin 310 and the second pin 320 in the correct position and improve the assembly accuracy.
[0045] Optionally, the first terminal 210 is soldered to the first pin 310, and the second terminal 220 is soldered to the second pin 320. Soldering provides a more robust and stable electrical connection, ensuring that the contact between the first terminal 210 and the first pin 310, and between the second terminal 220 and the second pin 320, is less likely to loosen, thus avoiding electrical faults or signal transmission problems caused by poor connection.
[0046] Optionally, the housing 100 is made of insulating material. Using insulating material for the housing 100 can effectively isolate the external environment from the electrical components inside the current transformer, preventing electric shock accidents when the external parts come into contact with the electrical components and improving the safety of the current transformer.
[0047] Optionally, the outer wall of the housing 100 is provided with reinforcing ribs to improve the compressive strength and impact resistance of the housing 100 and reduce the risk of deformation or breakage of the housing 100 under high load or external force.
[0048] The assembly process of the current inductor structure provided in this embodiment is as follows:
[0049] First, the first terminal 210 of the magnetic core copper wire 200 is soldered to the first pin 310, and the second terminal 220 is soldered to the second pin 320, so that the magnetic core copper wire 200 and the pin assembly 300 are connected.
[0050] Next, the magnetic core copper wire 200 and the pin assembly 300 are installed together into the housing 100;
[0051] Then, epoxy sealant is poured into the receiving cavity 110 inside the housing 100 and allowed to air dry naturally.
[0052] Finally, the first pin 310 and the second pin 320 are respectively inserted into the first solder hole and the second solder hole on the PCB substrate 400, and the first pin 310 and the second pin 320 are respectively soldered to the PCB substrate 400.
[0053] This embodiment also provides an electricity meter, including the current transformer structure described above, which eliminates the complex wire pre-processing steps, simplifies the connection process, reduces production steps, lowers the manufacturing cost of the electricity meter, and improves the production efficiency of the electricity meter.
[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A current transformer structure, characterized by The current transformer structure comprises: a shell (100) provided with a containing cavity (110) therein; a magnetic core copper wire (200) arranged in the containing cavity (110), the magnetic core copper wire (200) having a first wiring end (210) and a second wiring end (220); a pin assembly (300) arranged at least partially in the containing cavity (110), the pin assembly (300) comprising a first pin (310) and a second pin (320), the first wiring end (210) being connected with the first pin (310), and the second wiring end (220) being connected with the second pin (320); a PCB substrate (400) provided with a first solder hole and a second solder hole, the first pin (310) being capable of being inserted into the first solder hole, and the second pin (320) being capable of being inserted into the second solder hole.
2. The current transformer structure of claim 1, wherein, The current transformer structure further comprises a sealing gel, the sealing gel being sealed at an opening of the containing cavity (110).
3. The current transformer structure of claim 2, wherein, The sealing gel is made of silica gel or epoxy resin.
4. The current transformer structure of claim 1, wherein, The pin assembly (300) further comprises a first fixing member (330), the first pin (310) and the second pin (320) being arranged on the first fixing member (330) in a spaced manner.
5. The current transformer structure of claim 4, wherein, The pin assembly (300) further comprises a second fixing member (340), the second fixing member (340) being arranged in a spaced manner with the first fixing member (330), and the first pin (310) and the second pin (320) both penetrating through the second fixing member (340).
6. The current transformer structure of claim 5, wherein, The shell (100) is provided with a first positioning groove (120) and a second positioning groove (130), the first fixing member (330) being embedded in the first positioning groove (120), and the second fixing member (340) being embedded in the second positioning groove (130).
7. The current transformer structure of claim 1, wherein, The first wiring end (210) is welded with the first pin (310), and the second wiring end (220) is welded with the second pin (320).
8. The current transformer structure of claim 1, wherein, The shell (100) is made of insulating material.
9. The current transformer structure according to any of claims 1 - 8, characterized in that The outer wall of the shell (100) is provided with a reinforcing rib.
10. An electric energy meter, characterized by The current transformer structure comprises the shell (100), the magnetic core copper wire (200), the pin assembly (300), and the PCB substrate (400) as claimed in any one of claims 1-9.