Voltage separation device with detachable screw structure

Abstract

The invention provides a voltage separation device with a detachable screw structure. The voltage separation device comprises a pin, a screw, a circuit board, a socket, an insert nut and a bottom shell, the insert nut is embedded in the bottom shell and is used for fixing the screw, and the screw is assembled in the mounting holes of the circuit board and the bottom shell; the surface of the circuit board is provided with a tinned loop, and an opening is arranged near the mounting hole of the screw; the socket is welded on the circuit board and is electrically connected with the tinned loop; and the bottom shell and the circuit board are mutually connected into a whole through screws to form the voltage separating device. According to the invention, accurate control of on-off of a circuit is realized through mounting and loosening actions of the screws, the problem of mutual interference of current when a plurality of electronic instruments are connected at the same time in the prior art is solved, optimization of the production inspection process of the electronic instruments is realized, and the inspection efficiency and the inspection precision are improved.

Description

Technical Field

[0001] This invention relates to the field of electricity meters, and in particular to a voltage separation device with a detachable screw structure. Background Technology

[0002] In the production and inspection process of electronic instruments, it is usually necessary to connect the electronic instrument to an external voltage to test the instrument's measurement accuracy. However, most existing electronic instruments use current wire connection holes to connect external voltage wires for accuracy testing, which has the following drawbacks: 1. After the equipment is connected to the current loop of multiple electronic instruments, the voltage measurement of the downstream electronic instruments will affect the current measurement of the upstream electronic instruments, resulting in low accuracy and making it impossible for multiple instruments to measure simultaneously.

[0003] 2. In a single circuit of an electronic instrument, the incoming and outgoing current wire connection holes require a total of 4 screws for fixing. The screw assembly and disassembly operations are time-consuming and costly, and if the screws are not tightened, they will affect the measurement accuracy of the electronic instrument. Summary of the Invention

[0004] This invention addresses the technical problems of low equipment connection efficiency, unstable inspection accuracy, and long assembly and disassembly operations in the production and inspection process of existing electronic instruments. It proposes a voltage separation device with a detachable screw structure, which realizes circuit on / off control through the installation and loosening of screws, thereby optimizing the inspection process of electronic instruments.

[0005] The technical solution of this invention is: This invention provides a voltage separation device with a detachable screw structure, including a pin, a screw, a circuit board, a socket, an insert nut, and a bottom shell; The insert nut is fitted into the bottom shell to fix the screw, which is assembled in the mounting holes of the circuit board and the bottom shell; The circuit board has a tin-plated circuit on its surface and an opening near the screw mounting holes; the socket is soldered to the circuit board and electrically connected to the tin-plated circuit; the bottom shell and the circuit board are connected to each other by screws to form a single unit, forming a voltage separation device.

[0006] Furthermore, the bottom shell is provided with a socket mounting groove and a screw fixing post. The socket mounting groove is used to position and fix the socket, and the screw fixing post is used to support the screw and restrict the axial movement of the screw.

[0007] Furthermore, the pin is soldered onto the circuit board and electrically connected to the tin-plated circuit; both ends of the pin are provided with bakelite layers to enhance the pin's strength, and the metal pin body is exposed in the middle for clamping with the connection clip of an external voltage device.

[0008] Furthermore, the open design of the tin-plating circuit allows the tin-plating circuit to be closed when the screw is installed and to be opened when the screw is loosened.

[0009] Furthermore, the screw has a flat washer and a spring washer, both of which are made of copper. The flat washer is used to increase the contact area, and the spring washer is used to provide elastic support so that the screw can be moved away from the tin-plated circuit when it is loosened. The screw achieves circuit opening and closing control through two operations: installation and loosening.

[0010] Furthermore, when the screw is installed in the mounting holes of the circuit board and the bottom shell, the screw makes full contact with the tin-plated circuit and acts as a conductor to close the opening of the tin-plated circuit on the surface of the circuit board, so that the socket is connected to the tin-plated circuit. At this time, the circuit is conductive and the socket provides voltage.

[0011] Furthermore, when the screws are loosened from the mounting holes on the circuit board and the bottom shell, the opening of the tin-plated circuit is disconnected, and the connecting clip of the external voltage device is electrically connected to the tin-plated circuit by clamping onto the pin. At this time, the circuit is turned on, and the external voltage device provides voltage.

[0012] Furthermore, the screw is a copper screw with an outer diameter of 3mm, 4mm, or 5mm.

[0013] Furthermore, when the electronic instrument is a three-phase meter, there are four tin-plated circuits, three of which are set to correspond to the three-phase power supply and have openings near the screw mounting holes, and the other corresponds to the neutral wire; the socket is a four-terminal socket, three of which are electrically connected to the tin-plated circuits corresponding to the three-phase power supply, and the other is connected to the tin-plated circuit corresponding to the neutral wire.

[0014] Furthermore, when the electronic instrument is a single-phase meter, there are two tin-plating circuits, one of which is set to correspond to the single-phase power and has an opening near the screw mounting hole, and the other corresponds to the neutral wire; the socket is a two-terminal socket, one end of the socket is connected to the tin-plating circuit corresponding to the single-phase power, and the other end is connected to the tin-plating circuit corresponding to the neutral wire.

[0015] By adopting the above structure, the present invention has the following advantages compared with the prior art: 1. The detachable screw structure assembly switches between two voltage input modes by installing and loosening the screw body. The contact between the screw body and the tin-plated circuit on the circuit board reliably controls the connection and disconnection of the socket. Simultaneously, the provided pins facilitate quick clamping of external voltage connectors for voltage input. The entire process does not require complete screw removal. The connectors offer high clamping stability, are easy to install and remove, significantly improving assembly efficiency and reducing production and inspection time costs.

[0016] 2. The detachable screw structure allows multiple electronic instruments to be directly connected to the external device voltage, avoiding mutual current interference between electronic instruments when connected simultaneously. This significantly improves the efficiency of parallel testing of multiple instruments while achieving high-precision detection.

[0017] 3. The use of detachable screw structure components in electronic instruments simplifies the production and inspection process, improves product quality and performance, reduces the overall cost of the instruments, and has good practicality and economy.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0020] Figure 1 A schematic diagram of the assembly of the voltage separation device with a detachable screw structure according to the present invention is shown.

[0021] Figure 2 A circuit diagram of a tin plating circuit on a circuit board according to an embodiment of the present invention is shown.

[0022] Figure 3 A schematic diagram of the circuit board's conduction state according to an embodiment of the present invention is shown.

[0023] The components include: 1. Pins; 2. Screws; 3. Circuit board; 4. Sockets; 5. Insert nuts; 6. Base shell; 7. Tin-plated circuit. Detailed Implementation

[0024] Preferred embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0025] Example 1 like Figure 1 As shown, this invention provides a voltage separation device with a detachable screw structure. The device includes a pin 1, a screw 2, a circuit board 3, a socket 4, an insert nut 5, and a base shell 6. The insert nut 5 is press-fitted into the base shell 6 to fix the screw 2 and ensure a stable connection between the screw 2 and the base shell 6. The screw 2 is assembled in the mounting holes of the circuit board 3 and the base shell 6. The installation and loosening of the screw 2 directly affects the conductivity of the tin-plated circuit 7 on the circuit board 3, thereby achieving circuit on / off control.

[0026] The circuit board 3 has a tin-plated circuit 7 on its surface, and an opening is designed near the mounting hole of the screw 2. This opening design allows the tin-plated circuit 7 to close when the screw 2 is installed, forming a complete electrical connection path, and to disconnect when the screw 2 is loose, cutting off the electrical connection.

[0027] The socket 4 is soldered onto the circuit board 3 and electrically connected to the tin-plated circuit 7. The function of the socket 4 is to provide voltage input to the circuit when the screw 2 is installed, and at the same time ensure that current can be transferred from the socket 4 to the tin-plated circuit 7, thereby completing the circuit conduction function.

[0028] Pin 1 is soldered onto circuit board 3 and electrically connected to tin-plated circuit 7. Both ends of pin 1 are covered with bakelite material; the bakelite-covered portion of the pin enhances its strength and prevents damage from external forces. The exposed metal portion of the pin is used for clamping the external voltage device's connection clip. When screw 2 is loosened, the external voltage device's connection clip achieves electrical connection with tin-plated circuit 7 by clamping pin 1, thus completing the external voltage input function. This not only improves connection reliability but also simplifies the operation process.

[0029] Screw 2 has a flat washer and a spring washer, both made of copper. The flat washer increases the contact area between screw 2 and the tin-plated circuit 7 on the surface of circuit board 3, ensuring a stable electrical connection between screw 2 and the tin-plated circuit 7 when installed. The spring washer provides elastic support to prevent screw 2 from loosening during use. When screw 2 is loosened, screw 2 disengages from the tin-plated circuit 7 on the surface of circuit board 3, and the opening of the tin-plated circuit 7 is broken, thereby interrupting the electrical connection between socket 4 and the tin-plated circuit 7. This design enables precise control of circuit continuity through the installation and loosening of screw 2.

[0030] The base shell 6 is provided with a socket mounting slot and screw fixing posts. The socket mounting slot is used to position and fix the socket 4, ensuring the stability of the connection between the socket 4 and the circuit board 3. The screw fixing posts are used to support the screw 2 and restrict the axial movement of the screw 2, thereby ensuring the precise positioning of the screw 2 during installation and loosening. The base shell 6 and the circuit board 3 are connected to each other by the screw 2 to form an integral unit, which not only improves the overall stability of the device, but also facilitates subsequent assembly and maintenance.

[0031] In one example, screw 2 needs to be made of copper, and the outer diameter of the screw can be 3mm, 4mm, 5mm, etc.; the pin 1 and socket 4 need to be soldered to the circuit board; the external voltage device is clamped and assembled using metal connecting clips, which has high connection reliability and is easy to operate.

[0032] In one example, when the electronic instrument is a three-phase meter, there are four tin-plated circuits 7, three of which are set to correspond to the three-phase power supply and have an opening near the mounting hole of the screw 2, and the other one corresponds to the neutral wire; the socket 4 is a four-terminal socket, three of which are electrically connected to the tin-plated circuit 7 corresponding to the three-phase power supply, and the other end is connected to the tin-plated circuit 7 corresponding to the neutral wire.

[0033] In one example, when the electronic instrument is a single-phase meter, there are two tin-plated circuits 7, one of which is set to correspond to the single-phase power and has an opening near the mounting hole of the screw 2, and the other corresponds to the neutral wire; the socket 4 is a two-terminal socket, one end of the socket 4 is connected to the tin-plated circuit 7 corresponding to the single-phase power, and the other end is connected to the tin-plated circuit 7 corresponding to the neutral wire.

[0034] The specific principles and processes are as follows: S1. When screw 2 is installed in the mounting holes of circuit board 3 and base shell 6, screw 2 makes full contact with tin-plated circuit 7 and acts as a conductor to close the opening of tin-plated circuit 7 on the surface of circuit board 3, thus forming a complete electrical connection path. At this time, the tin-plated circuit where socket 4 is located can connect with the tin-plated circuit on the other side of the opening, the circuit is conductive, and the socket provides voltage. Figure 3 As shown, the circuit is in normal working condition at this time, and the electronic instruments can obtain a stable voltage input through socket 4.

[0035] S2. When screw 2 is loosened from the mounting holes in circuit board 3 and base shell 6, screw 2 separates from the contact part of tin-plated circuit 7, and the opening of tin-plated circuit 7 is disconnected, interrupting the electrical connection between socket 4 and tin-plated circuit 7. At this time, the connection clip of the external voltage device can be clamped onto pin 1, pin 1 maintains electrical connection with tin-plated circuit 7, and the external voltage device inputs voltage to tin-plated circuit 7 through pin 1, realizing another conduction state of the circuit. Figure 2 As shown, the circuit switches to external voltage input mode at this time, and the electronic instrument can obtain voltage input through an external voltage device to complete the accuracy test.

[0036] The detachable screw structure assembly of the present invention allows multiple electronic instruments to be directly connected to the voltage of external devices, avoiding mutual interference of current between electronic instruments when connected simultaneously, resulting in high production and inspection efficiency and high inspection accuracy.

[0037] In practical applications, the detachable screw structure assembly of this invention significantly optimizes the production and inspection process of electronic instruments. For example, on a mass production line for electronic instruments, workers can switch circuits simply by installing and loosening the screw 2, without having to completely remove it. This design not only simplifies the operation process but also improves assembly efficiency. Furthermore, the design of the pin 1 makes the clamping operation of external voltage devices more convenient, ensures high connection reliability, and significantly reduces production and inspection time costs.

[0038] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A voltage separation device with a detachable screw structure, characterized in that: Includes pins (1), screws (2), circuit board (3), socket (4), insert nuts (5), and bottom shell (6); The insert nut (5) is fitted into the bottom shell (6) for fixing the screw (2), which is assembled in the mounting holes of the circuit board (3) and the bottom shell (6); The circuit board (3) has a tin-plated circuit (7) on its surface and an opening near the mounting hole of the screw (2); the socket (4) is soldered onto the circuit board (3) and electrically connected to the tin-plated circuit (7); the bottom shell (6) and the circuit board (3) are connected to each other by screws (2) to form a voltage separation device.

2. The voltage separation device with a detachable screw structure according to claim 1, characterized in that: The bottom shell (6) is provided with a socket mounting groove and a screw fixing post. The socket mounting groove is used to position and fix the socket (4), and the screw fixing post is used to support the screw (2) and restrict the axial movement of the screw (2).

3. The voltage separation device with a detachable screw structure according to claim 1, characterized in that: The pin (1) is soldered onto the circuit board (3) and electrically connected to the tin-plated circuit (7); the pin (1) has bakelite layers at both ends to enhance its strength and exposes the metal pin body in the middle for clamping with the connection clip of the external voltage device.

4. The voltage separation device with a detachable screw structure according to claim 1, characterized in that: The open design of the tin-plating circuit (7) allows the tin-plating circuit (7) to be closed when the screw (2) is installed and to be opened when the screw (2) is loosened.

5. The voltage separation device with a detachable screw structure according to claim 1, characterized in that: The screw (2) has a flat washer and a spring washer. Both washers are made of copper. The flat washer is used to increase the contact area, and the spring washer is used to provide elastic support. When the screw (2) is loosened, it can be moved away from the tin-plated circuit (7). The screw (2) realizes the circuit opening and closing control through two operations: installation and loosening.

6. The voltage separation device with a detachable screw structure according to claim 1 or 5, characterized in that: When the screw (2) is installed in the mounting holes of the circuit board (3) and the bottom shell (6), the screw (2) makes full contact with the tin-plated circuit (7) and acts as a conductor to close the opening of the tin-plated circuit (7) on the surface of the circuit board (3), so that the socket (4) is connected to the tin-plated circuit (7). At this time, the circuit is connected and the socket (4) provides voltage.

7. The voltage separation device with a detachable screw structure according to claim 1 or 5, characterized in that: When the screw (2) is loosened from the mounting holes of the circuit board (3) and the bottom shell (6), the opening of the tin-plated circuit (7) is disconnected, and the connecting clip of the external voltage device is clamped on the pin (1) to achieve electrical connection with the tin-plated circuit (7). At this time, the circuit is turned on and the external voltage device provides voltage.

8. The voltage separation device with a detachable screw structure according to claim 1, characterized in that: The screw (2) is a copper screw with an outer diameter of 3mm, 4mm or 5mm.

9. The voltage separation device with a detachable screw structure according to claim 1, characterized in that: When the electronic instrument is a three-phase meter, there are four tin-plated circuits (7), three of which are set to correspond to the three-phase power and have an opening near the mounting hole of the screw (2), and the other one corresponds to the neutral wire; the socket (4) is a four-terminal socket, three of which are electrically connected to the tin-plated circuit (7) corresponding to the three-phase power, and the other end is connected to the tin-plated circuit (7) corresponding to the neutral wire.

10. The voltage separation device with a detachable screw structure according to claim 1, characterized in that: When the electronic instrument is a single-phase meter, there are two tin-plated circuits (7), one of which is set to correspond to the single-phase power and has an opening near the mounting hole of the screw (2), and the other corresponds to the neutral wire; the socket (4) is a two-terminal socket, one end of the socket (4) is connected to the tin-plated circuit (7) corresponding to the single-phase power, and the other end is connected to the tin-plated circuit (7) corresponding to the neutral wire.

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