CN114594290A - Direct current sensor with elbow connector output - Google Patents

Abstract

The invention relates to a direct current sensor with an output of a corner connector, which is provided with a U-shaped conductive terminal button, the corner connector and a cylindrical shell, wherein the cylindrical shell comprises an outer layer shielding structure and an inner layer shielding structure, an outer layer top cover is arranged at the upper part of the outer layer shielding structure, and the corner connector is arranged on the outer layer top cover; according to the electromagnetic shielding principle and the circuit trend, a plurality of concave-convex interlocking structures are designed at a plurality of key positions in a layered mode, so that the electromagnetic interference of a large-current direct-current sensor is greatly reduced, and the shielding effect is greatly improved.

Description

A DC sensor with elbow connector output

technical field

The invention belongs to the technical field of direct current sensors, in particular to a direct current sensor with an elbow connector output.

Background technique

The DC current sensor is used for DC current measurement and detection. It is an important external current data measurement, acquisition and detection component of DC measurement and detection equipment, and plays an important role in DC measurement and detection equipment. , a general DC sensor, fixed outside the detection device, and collects sensor data through pluggable connectors and cables. General DC sensors are fixed outside the detection equipment, and sensor data is collected through pluggable connectors and cables. It cannot be connected to the control circuit board in the DC detection equipment, and cannot meet the wiring and electromagnetic interference requirements of modern ammeters; it cannot get rid of the external interference protection system. This design reduces the current acquisition accuracy and increases the acquisition error.

SUMMARY OF THE INVENTION

The invention discloses a DC sensor with an elbow connector output, which is built in a DC detection device, such as a DC energy meter, and the elbow connector is directly connected with a PCB circuit board in the device, so that the collected signal is directly output from the elbow connector , which greatly facilitates the wiring of the ammeter and the electromagnetic interference requirements; the external interference protection system of the DC sensor is designed, which improves the current acquisition accuracy and reduces the acquisition error; according to the principle of electromagnetic shielding and the circuit direction, in many key parts, hierarchical design A plurality of concave-convex interlocking structures are provided, which greatly reduces the electromagnetic interference caused by large current to the DC sensor; the outer shielding structure and the inner shielding structure formed by the inner shielding side cover and the inner shielding shell groove together , constitutes a double-layer shielding, which greatly improves the shielding effect.

The technical solution of the present invention is: a DC sensor with an elbow connector output, which is provided with a U-shaped conductive terminal button (4), an elbow connector (1) and a cylindrical shell, wherein the cylindrical shell includes an outer layer A shielding structure (2) and an inner shielding structure, an outer top cover (10) is provided on the upper part of the outer shielding structure (2), and the elbow connector (1) is arranged on the outer top cover (10) on;

The inner layer shielding structure includes an inner layer shielding shell groove (26) and an inner layer shielding side cover (28), a magnetic core fixing structure (30) is provided at a lower position of the inner layer shielding shell groove (26), The magnetic core fixing structure (30) is provided with a wire wrap magnetic core (7), the wire wrap magnetic core (7) is a ring-shaped structure, and the two ends thereof are magnetic core heads (7-1), A collection circuit board is arranged in the middle of the magnetic core head (7-1); the U-shaped conductive terminal button (4) passes through the coil winding magnetic core (7), and the U-shaped conductive terminal button (4) passes through the coil winding magnetic core (7). 4) The outer surface of the bracket shielding layer (5) is wrapped, and a coil is provided outside the wire wrap winding magnetic core (7). The upper part of the magnetic core fixing structure (30) is provided with a sensor circuit board (8), the sensor circuit board (8) is connected with the acquisition circuit board through a data interface, and the elbow connector (1) is connected to the The sensor circuit board (8) is connected through the circuit board interface (8-1).

Preferably, the inner layer shielding shell groove (26) is in the shape of a U-shaped groove, and its top surface is a fork-shaped plane with multiple teeth, including stepped fork teeth (26-1), a rear row shell of the connector The groove fixing tines (26-2) and the connector shell groove clamping grooves (26-3), the outermost end of the stepped tines (26-1) is provided with a shell groove clamping step (27), and the connector The top end of the rear row housing slot fixing tines (26-2) is provided with an inner step (11) of the connector slot, and the outermost end of one side of the connector housing slot slot (26-3) is provided with a connector clip The outer step (12) of the groove is provided with a fixing snap protrusion (26-4) on the side surface of the inner layer shielding shell groove (26).

Preferably, the magnetic core fixing structure (30) includes a T-shaped support frame (30-1) and an arc-shaped inner support (30-2), and the T-shaped support frame (30-1) and the arc-shaped inner support (30-1) 30-2) The magnetic core fixing structure (30) is composed of two supporting ribs with a U-shaped cross-section attached together;

A support frame groove (30-3) is provided at the middle position of the upper surface of the T-shaped support frame (30-1), and an arc is provided on the lower surface of the arc inner support (30-2). shaped protrusions (30-4).

Preferably, the top surface of the inner shield side cover (28) is a plane with multiple grooves, including a stepped groove (22) and a connector side cover snap groove (20). One side of the cover card slot (20) is a connector rear row fixing table (21), and a top end of the connector rear row fixing table (21) is provided with a step (11) in the connector card slot. A notch, a circuit board side cover card slot (23) is arranged at the lower part of the inner shield side cover (28), and a fastening rib (24) is arranged on one side of the circuit board side cover card slot (23). ), side cover fixing grooves (19) are provided on both sides of the inner shielding side cover (28), and the side cover fixing grooves (19) correspond to the buckles corresponding to the inner shielding shell groove (26). The protrusions (26-4) are snapped together; when the inner shielding side cover (28) is engaged with the inner shielding shell groove (26), the fastening ribs (24) are fastened in the inner slot of the inner layer shielding shell slot (26).

Preferably, the stepped groove (22) is engaged with the stepped tines (26-1), and the fixing tines (26-2) of the rear housing grooves of the connector pass through the connector slot. The step (11) is fitted with the notch.

Preferably, the U-shaped conductive end button (4) is U-shaped, the bottom of which is wrapped around the magnetic core (7) through the wire wrap, and one side of the U-shaped conductive end button (4) is composed of stepped tines (26-1) and conductive end button positioning posts ( 26-5) is fixed with the card slot, the other side is fixed by the stepped groove (22), and the top ends of the two sides of the U-shaped conductive terminal button (4) are welded with the interface copper column (3) respectively. .

Preferably, a side cover circuit board clamping column (13) and a side cover circuit board bracket (14) are provided at the bottom of the inner shielding side cover (28), and the side cover circuit board clamping column (13) is located on the side Above the clamping stage of the cover circuit board bracket (14), the sensor circuit board (8) is fixed on the side cover circuit board bracket ( 14) on the card table.

Preferably, the elbow connector (1) is provided with a needle seat, a front row of pins and a rear row of pins, and the elbow connector (1) communicates with the outer top cover (10 through the needle seat) ) is fixed, the front row of pins is stuck through the needle seat in the slot formed by the connector shell slot slot (26-3) and the connector side cover slot (20); the rear row The pin passes through the pin seat and is fixed on the fixing fork (26-2) of the housing groove in the rear row of the connector.

Beneficial effects of the present invention:

1) The present invention is built in a DC detection device, such as a DC energy meter, and the elbow connector is directly connected to the PCB in the device, so that the collected signal is directly output from the elbow connector, which greatly facilitates the wiring of the ammeter and the electromagnetic interference requirements;

2) The present invention designs the external interference protection system of the DC sensor, improves the current acquisition accuracy and reduces the acquisition error;

3) According to the principle of electromagnetic shielding and the direction of the circuit, the present invention designs a plurality of concave-convex interlocking structures hierarchically in a number of key parts, which greatly reduces the electromagnetic interference caused by the high current to the DC sensor;

4) The outer shielding structure of the present invention, together with the inner shielding structure composed of the inner shielding side cover and the inner shielding shell groove, constitutes a double-layer shielding, which greatly improves the shielding effect.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the three-dimensional structure schematic diagram of the present invention;

Fig. 3 is the cross-sectional structure schematic diagram of the present invention;

4 is a schematic diagram of the magnetic core structure installation of the present invention;

5 is a schematic structural diagram of the inner shield side cover of the present invention;

6 is a schematic diagram of the rear view of the inner layer shielding side cover of the present invention;

FIG. 7 is a schematic top view structure diagram of the inner layer shielding side cover of the present invention;

8 is a perspective view of the inner layer shielding shell groove structure of the present invention;

FIG. 9 is a schematic diagram of the fixing structure of the inner shield shell slot magnetic core of the present invention;

FIG. 10 is a schematic diagram of the installation of the coil winding magnetic core structure of the present invention;

11 is a schematic diagram of the position of the coil winding magnetic core structure and the U-shaped conductive end button of the present invention;

12 is a schematic diagram of the installation of the bracket fixing frame of the present invention;

13 is a schematic diagram of the installation of the elbow connector and the inner shielding shell groove structure of the present invention;

14 is a schematic diagram of the installation of the inner shielding shell groove and the inner shielding side cover of the present invention;

15 is a schematic diagram of the installation of the sensor circuit board and the wire wrap magnetic core structure of the present invention;

FIG. 16 is an overall schematic diagram of the inner layer shielding structure of the present invention.

In the figure, 1. Elbow connector; 2. Cylindrical shell; 3. Interface copper column; 3-1. Copper column round hole; 4. U-shaped conductive terminal button; 5. Support shielding layer; 6. Support beam; 7. Wire wrap winding magnetic core; 7-1, magnetic core head; 8, sensor circuit board; 8-1, circuit board interface; 9, circuit board groove; 10, outer top cover; 11, connector card slot Inner step; 12. Outer step of connector card slot; 13. Side cover circuit board clamping column; 14. Side cover circuit board bracket; 15. Circuit board supporting side column; 16. Circuit board supporting center column; 17. Circuit board supporting side Column; 18. Circuit board shell slot card slot; 19. Side cover fixing slot; 20. Connector side cover card slot; 21. Connector rear row fixing table; 22. Step-shaped groove; 23. Circuit board side cover card Slot; 24. Fastening rib; 25. Side cover window; 26. Inner shielding shell slot; 26-1, Step-shaped fork; Connector shell slot card slot; 26-4, buckle protrusion; 26-5, conductive end button positioning column; 27, shell slot clip step; 28, inner shield side cover; 29, magnetic core gap; 30, Magnetic core fixing structure; 30-1, T-shaped support frame; 30-2, arc-shaped inner support; 30-3, support frame groove; 30-4, arc-shaped protrusion.

Detailed ways

1 to 16, the present invention relates to a DC sensor with an elbow connector output, which is provided with a U-shaped conductive end button (5), a bracket beam (6), an elbow connector (1) and a column The cylindrical shell includes an outer shielding structure (2) and an inner shielding structure, and an outer top cover (10) is provided on the upper part of the outer shielding structure (2), see Figures 1 and 1 As shown in 15, the pins of the elbow connector (1) are fixed on the outer top cover (10) through a pin seat;

8 and 14, the inner shielding structure includes an inner shielding shell groove (26) and an inner shielding side cover (28), and a lower position of the inner shielding shell groove (26) is provided with The magnetic core fixing structure (30) is provided with a wire wrapping magnetic core (7) on the magnetic core fixing structure (30); as shown in FIG. 10, the wire wrapping magnetic core (7) is a ring-shaped structure, The two ends of the magnetic core head (7-1) are provided with a collection circuit board in the middle of the magnetic core head (7-1), which is fixed on the arc-shaped protrusion (30-4). The acquisition circuit board is fixed on the sensor circuit board (8). The U-shaped conductive end button (4) passes through the wire wrap magnetic core (7) through the support beam (6),

The bracket shielding layer (5) is wrapped on the outer surface of the U-shaped conductive terminal button (4), a coil is provided outside the wire wrap magnetic core (7), and the acquisition circuit board is connected through a signal line interface Connected with the coil, a sensor circuit board (8) is arranged on the upper part of the magnetic core fixing structure (30), see Figure 15, the sensor circuit board (8) is connected to the acquisition circuit board through a data interface. For connection, the elbow connector (1) is connected with the sensor circuit board (8) through a circuit board interface (8-1).

The inner layer shielding shell groove (26) is in the shape of a U-shaped groove, as shown in Figures 8 to 11, and its top surface is a fork-shaped plane with multiple teeth, including stepped fork teeth (26-1), connecting The rear row of the housing slot fixing prongs (26-2) and the connector housing slot latching slot (26-3), the outermost end of the stepped prongs (26-1) is provided with a housing slot latching step (27). ), the top end of the fixing fork (26-2) of the rear row of the connector is provided with the inner step (11) of the connector slot, and the outermost end of one side of the slot (26-3) of the connector is provided with There are outer steps (12) of the connector slot, and when the inner shielding shell groove (26) and the inner shielding side cover (28) are snapped together, the several stepped structures are connected to the inner shielding side cover (28). The corresponding structure of the shielding side cover (28) is fastened, and the side surface of the inner shielding shell groove (26) is provided with a fixing snap protrusion (26-4), which satisfies the requirements of the inner shielding shell groove (26). ) and the external clamping of the inner shield side cover (28).

Referring to FIG. 9 and FIG. 10 , the magnetic core fixing structure (30) includes a T-shaped support frame (30-1) and an arc-shaped inner support (30-2). The T-shaped support frame (30-1) and the arc-shaped inner support (30-2) are bonded together by two U-shaped support ribs to form the magnetic core fixing structure (30); in the T-shaped support frame (30-1) A support frame groove (30-3) is arranged in the middle position of the upper surface, and an arc-shaped protrusion (30-4) is arranged on the lower surface of the inner arc-shaped support (30-2). This structure ensures the stable placement of the coil winding core (7) shown, and at the same time, the arc-shaped protrusion (30-4) in addition to positioning the coil winding core (7), the arc-shaped protrusion (30-4) 4) The lower end of the collection circuit board can be placed and fixed.

Referring to Figures 5 to 7, the top surface of the inner shield side cover (28) is a plane with multiple grooves, including a stepped groove (22) and a connector side cover card slot (20) One side of the connector side cover card slot (20) is the connector rear row fixing table (21). The top of the connector rear row fixing table (21) is provided with a step inside the connector card slot. (11) A matching slot, a circuit board side cover card slot (23) is provided at the lower part of the inner shield side cover (28), and one side of the circuit board side cover card slot (23) is provided with Fasten the rib (24), and set side cover fixing grooves (19) on both sides of the inner shielding side cover (28), the side cover fixing groove (19) and the inner shielding shell groove (26) The corresponding snap protrusions (26-4) are snapped together; when the inner shield side cover (28) is snapped with the inner shield shell groove (26), the fastening ribs (24) is fastened in the inner slot of the inner layer shielding shell slot (26). The stepped grooves (22) are engaged with the stepped tines (26-1), and the fixing tines (26-2) of the rear row of the housing grooves of the connector pass through the inner steps (11) of the connector card slots. ) fits into the notch.

Referring to Figure 3, Figure 8, Figure 12 and Figure 13, the U-shaped conductive end button (4) is U-shaped, the bottom of which is wound through the wire wrap around the magnetic core (7), and one side of which is formed by stepped tines (26-1) is fixed with the slot formed by the conductive end button positioning post (26-5), the other side of which is fixed by the stepped groove (22), on both sides of the U-shaped conductive end button (4) The top ends are respectively welded with the interface copper pillars (3).

Referring to FIG. 5 , a side cover circuit board clamping column (13) and a side cover circuit board bracket (14) are provided at the bottom of the inner shielding side cover (28), and the side cover circuit board clamping column (13) ) is located above the card stage of the side cover circuit board bracket (14), and the sensor circuit board (8) is fixed on the side cover circuit through the circuit board side cover card slot (23) and the side cover circuit board card post (13). on the card table of the plate bracket (14).

The elbow connector (1) is provided with a needle seat, a front row of pins and a rear row of pins, see Figures 1, 8, 14 and 15, and the elbow connector (1) passes through the needles The seat is fixed to the outer top cover (10), and the front row of pins passes through the needle seat and is clamped by the connector housing slot slot (26-3) and the connector side cover slot (20). ); the rear row of pins is fixed on the fixing fork (26-2) of the rear row of shell grooves of the connector through the needle seat.

General DC sensors are fixed outside the detection equipment, and sensor data is collected through pluggable connectors and cables. The invention is built in a DC detection device, such as a DC energy meter, and the elbow connector is directly connected to the PCB in the device, so that the collected signal is directly output from the elbow connector, which greatly facilitates the wiring of the ammeter and the requirements for electromagnetic interference; a DC sensor is designed. The external interference protection system improves the current acquisition accuracy and reduces the acquisition error; according to the principle of electromagnetic shielding and the direction of the circuit, a number of concave-convex interlocking structures are designed hierarchically in several key parts, which greatly reduces the impact of high current on the DC sensor. For electromagnetic interference; the outer shielding structure (2) and the inner shielding structure formed by the inner shielding side cover (28) and the inner shielding shell groove (26) together form a double-layer shielding, Greatly improved the shielding effect.

Claims (8)

1. The utility model provides a take direct current sensor of corner connector output, is equipped with U-shaped conductive terminal (4), corner connector (1) and cylindricality shell, characterized by: the cylindrical shell comprises an outer-layer shielding structure (2) and an inner-layer shielding structure, an outer-layer top cover (10) is arranged at the upper part of the outer-layer shielding structure (2), and the corner connector (1) is arranged on the outer-layer top cover (10);

the inner-layer shielding structure comprises an inner-layer shielding shell groove (26) and an inner-layer shielding side cover (28), a magnetic core fixing structure (30) is arranged at the lower part of the inner-layer shielding shell groove (26), a coil winding magnetic core (7) is arranged on the magnetic core fixing structure (30), the coil winding magnetic core (7) is of an annular structure, magnetic core heads (7-1) are arranged at two ends of the coil winding magnetic core (7), and a collection circuit board is arranged in the middle of each magnetic core head (7-1); u-shaped conductive terminal button (4) are followed solenoid winding magnetic core (7) pass the surface parcel of U-shaped conductive terminal button (4) support shielding layer (5) the outside of solenoid winding magnetic core (7) is equipped with the coil, acquisition circuit board pass through the signal line interface with the coil is connected the upper portion of magnetic core fixed knot constructs (30) is equipped with sensor circuit board (8), sensor circuit board (8) with acquisition circuit board is connected through data interface, corner connector (1) with sensor circuit board (8) are connected through circuit board interface (8-1).

2. The dc sensor with an elbow connector output of claim 1, wherein: the inner shielding shell groove (26) is in a U-shaped groove shape, the top surface of the inner shielding shell groove is a fork-shaped plane with multiple teeth, and the inner shielding shell groove comprises step-shaped fork teeth (26-1), connector rear row shell groove fixing fork teeth (26-2) and a connector shell groove clamping groove (26-3), the outermost end of the step-shaped fork teeth (26-1) is provided with a shell groove clamping step (27), the top end of the connector rear row shell groove fixing fork teeth (26-2) is provided with a connector clamping groove inner step (11), the outermost end of one side of the connector shell groove clamping groove (26-3) is provided with a connector clamping groove outer step (12), and the side surface of the inner shielding shell groove (26) is provided with a clamping protrusion (26-4) for fixing.

3. The dc sensor with an elbow connector output of claim 1, wherein: the magnetic core fixing structure (30) comprises a T-shaped support frame (30-1) and an arc-shaped inner support (30-2), wherein the T-shaped support frame (30-1) and the arc-shaped inner support (30-2) are attached together through two support ribs with U-shaped sections to form the magnetic core fixing structure (30);

a support frame groove (30-3) is arranged in the middle of the upper surface of the T-shaped support frame (30-1), and an arc-shaped bulge (30-4) is arranged on the lower surface of the arc-shaped inner support (30-2).

4. The dc sensor with an elbow connector output of claim 2, wherein: the top surface of the inner shielding side cover (28) is a plane with multiple grooves and comprises a step-shaped groove (22) and a connector side cover clamping groove (20), one side of the connector side cover clamping groove (20) is a connector rear row fixing table (21), a notch matched with the connector clamping groove inner step (11) is formed in the top end of the connector rear row fixing table (21), a circuit board side cover clamping groove (23) is formed in the lower portion of the inner shielding side cover (28), a fastening convex rib (24) is formed in one side of the circuit board side cover clamping groove (23), side cover fixing grooves (19) are formed in two sides of the inner shielding side cover (28), and the side cover fixing grooves (19) are clamped with the fastening protrusions (26-4) corresponding to the inner shielding shell groove (26); when the inner shielding side cover (28) is buckled with the inner shielding shell groove (26), the fastening convex ribs (24) are fastened in the internal clamping grooves of the inner shielding shell groove (26).

5. The dc sensor with an elbow connector output of claim 4, wherein: the step-shaped groove (22) is buckled with the step-shaped fork tooth (26-1), and the fixing fork tooth (26-2) of the rear row shell groove of the connector is embedded with the groove opening through the inner step (11) of the clamping groove of the connector.

6. The dc sensor with an output of an elbow connector according to claim 2 or 4, wherein: the U-shaped conductive terminal button (4) is U-shaped, the bottom of the U-shaped conductive terminal button penetrates through the solenoid winding magnetic core (7), one side of the U-shaped conductive terminal button is fixed by a clamping groove formed by step-shaped fork teeth (26-1) and conductive terminal button positioning columns (26-5), the other side of the U-shaped conductive terminal button is fixed by step-shaped grooves (22), and the top ends of the two sides of the U-shaped conductive terminal button (4) are welded with the interface copper columns (3) respectively.

7. The dc sensor with an elbow connector output of claim 2, wherein: the bottom of the inner shielding side cover (28) is provided with a side cover circuit board clamping column (13) and a side cover circuit board support (14), the side cover circuit board clamping column (13) is located above a clamping table of the side cover circuit board support (14), and the sensor circuit board (8) is fixed on the clamping table of the side cover circuit board support (14) through a circuit board side cover clamping groove (23) and the side cover circuit board clamping column (13).

8. The dc sensor with an elbow connector output of claim 6, wherein: the elbow connector (1) is provided with a needle seat, a front row of contact pins and a rear row of contact pins, the elbow connector (1) is fixed with the outer layer top cover (10) through the needle seat, and the front row of contact pins penetrate through the needle seat and are clamped in a notch formed by the connector shell groove clamping groove (26-3) and the connector side cover clamping groove (20); the back row of pins penetrate through the pin base and are fixed on the fixing fork teeth (26-2) of the back row of shell grooves of the connector.

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