Self-locking wiring meter support of electric energy meter

Abstract

The invention belongs to the technical field of electric energy meters, and particularly relates to a self-locking type wiring meter support of an electric energy meter, which comprises an electric energy meter body, and the electric energy meter body is provided with a wiring meter support; the wiring meter support comprises a clamping seat and a fixed copper sheet; a locking groove and a press-in groove are formed in the clamping seat; a connecting sleeve is installed on the wire, and the connecting sleeve and the locking groove are in a conical shape. The connecting sleeve comprises a mounting ring and a contact elastic sheet, a fixing area is arranged at one end, close to the fixed copper sheet, of the contact elastic sheet, a clamping groove is formed in the fixing area, a wire pressing end is arranged at one end, facing the fixed copper sheet, of the wire, and the wire pressing end is folded and clamped into the clamping groove; the structure is simple, through cooperation of the connecting sleeve and the wire, the wire is firmly fixed and has a self-locking effect, the reliability and safety of wire connection are improved, meanwhile, the contact area during wire fixing is increased, and reliable electrical connection between the wire and an electric energy meter is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric energy meters, and specifically relates to a self-locking wiring table support for an electric energy meter. Background Art

[0002] An electric energy meter is an instrument used to measure electrical variables. Electric energy meters can be classified into electromechanical electric energy meters and electronic electric energy meters according to their working principles. Electromechanical electric energy meters are used in AC circuits as ordinary electric energy measuring instruments, and the most commonly used one is the induction type electric energy meter. Electronic electric energy meters can be divided into fully electronic electric energy meters and electromechanical electric energy meters.

[0003] In the existing intelligent electric energy meters, they have the ability to connect to the network, can remotely count the electricity consumption, and monitor abnormal electricity usage. However, the existing intelligent electric energy meters still have the following technical problems: The connection between the electric energy meter and the wire often uses a simple screw connection. The end of the screw directly abuts against the wire, and the contact area between the wire and the screw is small, which easily leads to the phenomena of virtual connection and heating. In addition, the screw connection is not reliable or safe. With long-term use, the wire heats up and deforms, the force between the screw and the wire decreases, and it is easy for the two to become loose. Summary of the Invention

[0004] In order to make up for the deficiencies of the existing technology, through the cooperation of the connecting sleeve and the wire, the wire is fixed firmly and has a self-locking effect, improving the reliability and safety of the wire connection. At the same time, the contact area when the wire is fixed is increased to ensure reliable electrical connection between the wire and the electric energy meter. The present invention proposes a self-locking wiring table support for an electric energy meter.

[0005] The technical solution adopted by the present invention to solve its technical problems is: The self-locking wiring table support for an electric energy meter of the present invention includes an electric energy meter body. A wiring groove is opened on the electric energy meter body, a gland is installed on the wiring groove, a wiring table support is installed in the wiring groove, and a wire is installed on the wiring table support; The wiring table support includes a card seat and a fixed copper sheet connected to each other, and the fixed copper sheet is connected to the circuit inside the electric energy meter body; A locking groove and a pressing groove are opened on the card seat. The pressing groove is communicated with the locking groove, and the width of the pressing groove is greater than or equal to the diameter of the wire; A connecting sleeve is installed on the wire. The outer shapes of the connecting sleeve and the locking groove are conical. The connecting sleeve is squeezed by the inner wall of the locking groove, and the diameter of the locking groove at the end close to the fixed copper sheet is greater than the diameter of its other end; The connecting sleeve includes a mounting ring and contact elastic pieces. A plurality of groups of contact elastic pieces are evenly arranged. The contact elastic pieces are in contact with the surface of the wire. A fixing area is arranged at one end of the contact elastic piece close to the fixed copper piece. A clamping groove is formed in the fixing area. One end of the wire facing the fixed copper piece is provided with a pressed wire end, and the pressed wire end is folded and clamped into the clamping groove.

[0006] Preferably, an extrusion piece is mounted on the connecting sleeve. The extrusion piece is located above the fixing area, and one end of the extrusion piece facing the fixed copper piece is in a free state. A positioning depression is formed on the surface of the fixing area. The end of the pressed wire end is located in the positioning depression, and the extrusion piece presses the pressed wire end.

[0007] Preferably, an elastic strip is mounted on the extrusion piece. The elastic strip is made of a magnetic rubber strip, and the elastic strip is located between the extrusion piece and the fixing area.

[0008] Preferably, the surfaces of the fixing area and the positioning depression are roughened.

[0009] Preferably, one end of the contact elastic piece close to the fixed copper piece is an anti-slip section, and one end of the contact elastic piece away from the fixed copper piece is a contact section. The surface of the contact section is directly in contact with the surface of the wire. Uniformly distributed clamping blocks are arranged on the anti-slip section. The cross section of the clamping block is triangular, and the clamping block presses on the surface of the wire. The clamping block is made of a bimetallic sheet.

[0010] Preferably, positioning protrusions are mounted on the mounting ring. The positioning protrusions are arranged in pairs, and the distance between the positioning protrusions is equal to the width of the press-fitting groove. The positioning protrusions are in contact with the side wall of the press-fitting groove.

[0011] Preferably, a mounting groove is formed in the card seat, and a reinforcing bolt is mounted in the mounting groove. The reinforcing bolt is in contact with one end of the connecting sleeve facing the fixed copper piece.

[0012] Preferably, the lower end of the reinforcing bolt is a conical surface, and a retaining piece is mounted on the conical surface.

[0013] The beneficial effects of the present invention are as follows: 1. The self-locking wiring terminal block of an electric energy meter according to the present invention, by providing a press-in groove, a locking groove, a connecting sleeve and a reinforcing bolt, after the connecting sleeve is installed on the wire, the connecting sleeve is not easily detached from the wire, so that it is convenient to install and clamp the wire and the connecting sleeve into the locking groove, and the connecting sleeve is further locked by the reinforcing bolt to prevent the connecting sleeve from loosening or disengaging from the locking groove, ensuring the reliability of the electrical connection between the wire and the electric energy meter. At the same time, the locking groove cooperates with the connecting sleeve to make the wire more firmly fixed when subjected to an external force, so that the wiring terminal block and the wire have a self-locking effect. At the same time, the wire is in full contact with the connecting sleeve, and the connecting sleeve is in full contact with the locking groove, increasing the contact area when the wire is fixed and ensuring good electrical performance of the wire.

[0014] 2. The self-locking wiring terminal block of an electric energy meter according to the present invention, by providing a clamping groove, a pressing piece, a clamping block and a pressing wire end, the wire is clamped into the clamping groove and fixed by the pressing piece, ensuring the stable connection between the wire and the connecting sleeve, preventing the connecting sleeve from sliding or falling off the wire, affecting the fixing of the wire and the electrical connection effect of the wire. At the same time, the clamping block further increases the pressing and fixing effect on the wire to prevent the wire from sliding or falling off in the connecting sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 is the first three-dimensional view of the electric energy meter equipped with the wiring terminal block of the present invention; Figure 2 is the second three-dimensional view of the electric energy meter equipped with the wiring terminal block of the present invention; Figure 3 is the structural schematic diagram of the wiring terminal block of the present invention; Figure 4 is the cross-sectional view of the wiring terminal block of the present invention; Figure 5 is the cross-sectional view of the connecting sleeve in the wiring terminal block of the present invention; Figure 6 is the structural schematic diagram of the connecting sleeve in the wiring terminal block of the present invention; Figure 7 is the three-dimensional view of the pressing piece in the wiring terminal block of the present invention; Figure 8 is Figure 4 the partial enlarged view at A in Figure 9 is Figure 6 the partial enlarged view at B in In the figure: electricity meter body 1, wiring slot 11, gland 12, wiring table support 2, card seat 21, fixed copper sheet 22, locking slot 23, press-in slot 24, installation slot 25, reinforcing bolt 26, conical surface 261, retaining piece 262, connecting sleeve 3, mounting ring 31, positioning protrusion 311, contact elastic piece 32, clamping block 321, fixed area 33, clamping groove 331, positioning depression 332, extrusion piece 34, elastic strip 341, wire 4, pressed wire end 41, contact section I, anti-slip section II. Detailed implementation manner

[0017] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0018] As Figures 1 to 9 shown, a self-locking wiring table support of an electricity meter according to the present invention includes an electricity meter body 1, a wiring slot 11 is opened on the electricity meter body 1, a gland 12 is installed on the wiring slot 11, a wiring table support 2 is installed in the wiring slot 11, and a wire 4 is installed on the wiring table support 2; The wiring table support 2 includes a card seat 21 and a fixed copper sheet 22 which are connected to each other, and the fixed copper sheet 22 is connected to the circuit inside the electricity meter body 1; The card seat 21 is provided with a locking slot 23 and a press-in slot 24, the press-in slot 24 communicates with the locking slot 23, and the width of the press-in slot 24 is greater than or equal to the diameter of the wire 4; A connecting sleeve 3 is installed on the wire 4, the outer shapes of the connecting sleeve 3 and the locking slot 23 are conical, the connecting sleeve 3 is extruded by the inner wall of the locking slot 23, and the diameter of one end of the locking slot 23 close to the fixed copper sheet 22 is greater than that of the other end; The connecting sleeve 3 includes a mounting ring 31 and contact elastic pieces 32, a plurality of groups of contact elastic pieces 32 are uniformly arranged, the contact elastic pieces 32 are in contact with the surface of the wire 4, a fixed area 33 is arranged at one end of the contact elastic piece 32 close to the fixed copper sheet 22, a clamping groove 331 is opened on the fixed area 33, a pressed wire end 41 is arranged at one end of the wire 4 facing the fixed copper sheet 22, and the pressed wire end 41 is folded and clamped into the clamping groove 331; During use, loosen the bolt on the gland 12, remove the gland 12 from the electricity meter body 1, then install the connecting sleeve 3 into the locking slot 23 on the card seat 21, so that the connecting sleeve 3 and the wire 4 are clamped and locked in the locking slot 23 to ensure reliable connection between the wire 4 and the electricity meter body 1, and then reinstall the gland 12 onto the electricity meter body 1; Meanwhile, the metal part of the end of the wire 4 after stripping the outer skin is successively passed through the mounting ring 31 and the contact spring piece 32, so that the connecting sleeve 3 is in full contact with the metal part on the wire 4, increasing the contact area and ensuring good electrical conductivity. At the same time, for the end of the wire 4 passing through the contact spring piece 32, it is set as the pressing wire end 41. The pressing wire end 41 is bent and folded so that the pressing wire end 41 is snapped into the clamping groove 331 on the connecting sleeve 3. Thus, the stable installation of the connecting sleeve 3 on the wire 4 is ensured through the snap connection between the pressing wire end 41 and the clamping groove 331, preventing the connecting sleeve 3 from slipping off the wire 4 or falling off the wire 4 under external force, which may affect the subsequent installation and fixation of the connecting sleeve 3 and the wire 4; Meanwhile, when installing the wire 4 and the connecting sleeve 3, the wire 4 is placed into the locking groove 23 from the pressing groove 24. After that, while keeping the wire 4 in the locking groove 23, the wire 4 is pulled until the connecting sleeve 3 gradually slides in and is clamped into the locking groove 23. Thus, by utilizing the characteristics that the inner wall of the locking groove 23 and the outer shape of the connecting sleeve 3 are conical, the inner wall of the locking groove 23 squeezes the contact spring piece 32 on the connecting sleeve 3, making the contact spring piece 32 contact and press the wire 4, fully fixing the wire 4. At the same time, due to the conical shapes of the locking groove 23 and the connecting sleeve 3, when the wire 4 is under external force and drives the connecting sleeve 3 to move, the acting force between the connecting sleeve 3 and the locking groove 23 will become larger and larger, and the acting force for clamping and fixing the wire 4 will also become larger and larger, producing a self-locking effect. Thus, it is avoided that the wire 4 and the wiring table support 2 become loose and have poor contact during the use of the electricity meter body 1, ensuring a reliable and stable connection between the wire 4 and the electricity meter body 1; Meanwhile, during the process of pulling the wire 4 to drive the connecting sleeve 3 into the locking groove 23, the pressing wire end 41 at the end of the wire 4 and the clamping groove 331 are snap-connected to each other, making the connection between the wire 4 and the connecting sleeve 3 stable, preventing the connecting sleeve 3 from falling off the wire 4 under force, which may affect the insertion of the connecting sleeve 3 into the locking groove 23. At the same time, after the connecting sleeve 3 enters the locking groove 23, the part of the pressing wire end 41 passing through the card slot will be located between the fixed area 33 and the inner wall of the locking groove 23, further locking and fixing the wire 4, improving the self-locking effect of the wiring table support 2, ensuring good contact between the wire 4 and the electricity meter body 1. At the same time, during the process of pulling the connecting sleeve 3 into the locking groove 23, the staff can also use tools to push the connecting sleeve 3, making the connecting sleeve 3 enter the locking groove 23 faster and more easily, increasing the acting force between the connecting sleeve 3 and the locking groove 23, and improving the fixing and self-locking effects of the wire 4.

[0019] As an embodiment of the present invention, an extrusion piece 34 is installed on the connecting sleeve 3. The extrusion piece 34 is located above the fixed area 33, and one end of the extrusion piece 34 facing the fixed copper piece 22 is in a free state; A positioning depression 332 is formed on the surface of the fixing area 33. The end of the pressing wire end 41 is located in the positioning depression 332, and the pressing piece 34 presses the pressing wire end 41. After the pressing wire end 41 is snapped into the clamping groove 331, the end of the pressing wire end 41 that penetrates out of the clamping groove 331 is bent, folded and then pressed into the positioning depression 332 to ensure the stable position of the pressing wire end 41 in the fixing area 33. At the same time, after the connecting sleeve 3 enters the locking groove 23, the pressing piece 34 located above the fixing area 33 will also be squeezed by the inner wall of the locking groove 23, so that the gap between the pressing piece 34 and the fixing area 33 is reduced, that is, the pressing piece 34 will press the pressing wire end 41 in the positioning depression 332, increasing the friction between the pressing wire end 41 and the fixing area 33, pressing the wire 4, making it difficult for the pressing wire end 41 and the wire 4 to break away from the connecting sleeve 3, improving the connection effect and self-locking effect of the wire 4, and avoiding the loosening and poor contact of the wire 4 connected to the electricity meter body 1.

[0020] As an embodiment of the present invention, an elastic strip 341 is installed on the pressing piece 34. The elastic strip 341 is made of a magnetic rubber strip, and the elastic strip 341 is located between the pressing piece 34 and the fixing area 33. Since the elastic strip 341 is made of a magnetic rubber strip, when the pressing wire end 41 is snapped into the clamping groove 331 and the connecting sleeve 3 has not entered the locking groove 23, the pressing piece 34 can be closely attached to the surface of the fixing area 33 under the magnetic action of the elastic strip 341, so as to press and fix the pressing wire end 41 located in the positioning depression 332, improving the fixing effect between the pressing wire end 41 and the clamping groove 331, and avoiding the connecting sleeve 3 slipping or falling off the wire 4 when the wire 4 is inserted into the connecting sleeve 3 and the connecting sleeve 3 is not inserted into the locking groove 23, which affects the wiring efficiency between the wire 4 and the electricity meter body 1 and increases the workload of the staff. At the same time, after the connecting sleeve 3 enters the locking groove 23, the pressing piece 34 will be squeezed by the inner wall of the locking groove 23, so that the elastic strip 341 further presses the pressing wire end 41, and the elastic strip 341 is deformed to fill the gap between the pressing wire end 41 and the positioning depression 332, increasing the contact area with the pressing wire end 41, improving the fixing effect on the pressing wire end 41, and making the self-locking effect of the wire 4 good.

[0021] As an embodiment of the present invention, the surfaces of the fixing area 33 and the positioning depression 332 are roughened. By roughening the surfaces of the fixed area 33 and the positioning recess 332 to make their surface roughness relatively large, when the extrusion piece 34 extrudes and fixes the pressing wire end 41, the elastic strip 341 is used to increase the friction force received by the pressing wire end 41, thereby improving the fixing effect of the pressing wire end 41 and the self-locking effect of the wire 4, and avoiding the situation of loosening and poor contact of the wire 4 during use.

[0022] As an embodiment of the present invention, one end of the contact elastic piece 32 close to the fixed copper piece 22 is an anti-slip section II, and one end of the contact elastic piece 32 far from the fixed copper piece 22 is a contact section I. The surface of the contact section I is directly in contact with the surface of the wire 4. Uniformly distributed blocks 321 are arranged on the anti-slip section II. The cross-section of the block 321 is triangular, and the block 321 presses on the surface of the wire 4; The block 321 is made of a bimetallic sheet; Since one end of the contact elastic piece 32 far from the fixed copper piece 22 is set as the contact section I, when the connecting sleeve 3 is installed on the wire 4, the smooth contact section I will closely adhere to the surface of the wire 4, making the contact between the connecting sleeve 3 and the wire 4 sufficient and the contact area relatively large. With the contact and extrusion between the connecting sleeve 3 and the inner wall of the locking groove 23, the wire 4 and the wiring table support 2 will be in full contact, thereby ensuring good electrical conductivity between the wire 4 and the electricity meter body 1 and avoiding poor contact between the two, which affects the normal operation of the electricity meter body 1; At the same time, by setting one end of the contact elastic piece 32 close to the fixed copper piece 22 as the anti-slip section II and arranging the block 321 on the anti-slip section II, after the connecting sleeve 3 is snapped into the locking groove 23 and the inner wall of the locking groove 23 squeezes the contact elastic piece 32, the block 321 further squeezes and clamps the wire 4, increasing the friction force between the wire 4 and the connecting sleeve 3. When the wire 4 is subjected to an external force, it will be clamped tighter and tighter by the connecting sleeve 3, improving the self-locking ability of the wire 4 and avoiding the wire 4 slipping out or sliding from the connecting sleeve 3 when the wire 4 is subjected to an external force, which affects the normal operation of the electricity meter body 1; At the same time, since the block 321 is made of a bimetallic sheet, when the wire 4 is energized and heated or the ambient temperature rises, the bimetallic sheet forming the block 321 will further deform, causing the block 321 to further squeeze and press the wire 4, improving the self-locking ability of the wire 4 and ensuring the stable connection effect between the wire 4 and the electricity meter body 1.

[0023] As an embodiment of the present invention, positioning protrusions 311 are installed on the mounting ring 31. The positioning protrusions 311 are arranged in pairs, and the distance between the positioning protrusions 311 is equal to the width of the press-fitting groove 24. The positioning protrusions 311 are in contact with the side walls of the press-fitting groove 24; When the connecting sleeve 3 is snapped into the locking groove 23, the positioning protrusion 311 on the connecting sleeve 3 will be snapped into the press-in groove 24, so as to fix the relative angle of the connecting sleeve 3 in the locking groove 23, and prevent the connecting sleeve 3 from sliding or rotating when the wire 4 pulls the connecting sleeve 3 into the locking groove 23 or the staff uses tools to push the connecting sleeve 3 into the locking groove 23, resulting in torsion between the connecting sleeve 3 and the wire 4, and causing looseness and slippage between the wire 4 and the connecting sleeve 3, affecting the fixation of the connecting sleeve 3 to the wire 4 and the self-locking effect of the wire 4. At the same time, through the arranged positioning protrusion 311, it is convenient for the staff to observe the installation position of the connecting sleeve 3 in the locking groove 23 from the press-in groove 24, so as to ensure that the connecting sleeve 3 and the wire 4 are fully fixed in the locking groove 23, and avoid poor connection effect between the wire 4 and the electricity meter body 1, affecting the working effect of the electricity meter body 1.

[0024] As an embodiment of the present invention, an installation groove 25 is formed on the card seat 21, and a reinforcing bolt 26 is installed in the installation groove 25, and the reinforcing bolt 26 is in contact with one end of the connecting sleeve 3 facing the fixed copper sheet 22; After the connecting sleeve 3 is installed in the locking groove 23, the staff installs the reinforcing bolt 26 into the installation groove 25 on the card seat 21 through tools, so that the reinforcing bolt 26 is in contact with one end of the connecting sleeve 3 facing the fixed copper sheet 22, thereby preventing the connecting sleeve 3 from moving in the direction towards the fixed copper sheet 22, that is, the wire 4 and the connecting sleeve 3 cannot be loosened from the locking groove 23, so as to avoid the wire 4 and the connecting sleeve 3 withdrawing from the locking groove 23 when the wire 4 vibrates under the influence of the outside world, resulting in the failure of the installation and fixation of the wire 4.

[0025] As an embodiment of the present invention, the lower end of the reinforcing bolt 26 is a conical surface 261, and a retaining piece 262 is installed on the conical surface 261; Since the lower end of the reinforcing bolt 26 is a conical surface 261, during the process of installing the reinforcing bolt 26 into the installation groove 25, the conical surface 261 at the lower end of the reinforcing bolt 26 will first contact the side surface of the connecting sleeve 3 facing the fixed copper sheet 22, so that the connecting sleeve 3 moves in the direction away from the fixed copper sheet 22 as the reinforcing bolt 26 is screwed in, increasing the clamping effect between the connecting sleeve 3 and the locking groove 23, that is, improving the fixing effect on the wire 4; Meanwhile, since the retaining piece 262 is installed on the conical surface 261, when the reinforcing bolt 26 is screwed in, the retaining piece 262 will be squeezed by the end face of the connecting sleeve 3 towards the fixed copper sheet 22 and fit onto the conical surface 261, preventing the retaining piece 262 from affecting the screwing in of the reinforcing bolt 26. When the reinforcing bolt 26 is unscrewed from the installation groove 25 in the reverse direction, the retaining piece 262 will be blocked by the end face of the connecting sleeve 3 towards the fixed copper sheet 22, preventing the reinforcing bolt 26 from smoothly exiting the installation groove 25, thereby avoiding the loosening of the reinforcing bolt 26 due to external vibration or external force, and preventing the reinforcing bolt 26 from exiting the installation groove 25 and affecting the installation stability of the connecting sleeve 3.

[0026] The specific working process is as follows: During use, loosen the bolt on the gland 12, remove the gland 12 from the electricity meter body 1. Then, install the connecting sleeve 3 into the locking groove 23 on the card seat 21, so that the connecting sleeve 3 and the wire 4 are clamped and locked in the locking groove 23. After that, reinstall the gland 12 onto the electricity meter body 1; Meanwhile, the metal part after stripping the outer skin at the end of the wire 4 is passed through the mounting ring 31 and the contact spring piece 32 in sequence, so that the connecting sleeve 3 is in full contact with the metal part on the wire 4. At the same time, the end of the wire 4 passing through the contact spring piece 32 is set as the pressing wire end 41, and the pressing wire end 41 is bent and folded so that the pressing wire end 41 is snapped into the clamping groove 331 on the connecting sleeve 3, preventing the connecting sleeve 3 from slipping off the wire 4 or the connecting sleeve 3 falling off the wire 4 under the action of external force; Meanwhile, when installing the wire 4 and the connecting sleeve 3, place the wire 4 into the locking groove 23 from the pressing groove 24. Then, while keeping the wire 4 in the locking groove 23, pull the wire 4 until the connecting sleeve 3 gradually slides in and is clamped into the locking groove 23, so that the inner wall of the locking groove 23 squeezes the contact spring piece 32 on the connecting sleeve 3, causing the contact spring piece 32 to contact and press the wire 4. At the same time, due to the conical shapes of the locking groove 23 and the connecting sleeve 3, when the wire 4 is affected by external force and drives the connecting sleeve 3 to move, the acting force between the connecting sleeve 3 and the locking groove 23 will become larger and larger, and the acting force for clamping and fixing the wire 4 will also become larger and larger; Meanwhile, during the process of pulling the wire 4 to drive the connecting sleeve 3 into the locking groove 23, the pressing wire end 41 at the end of the wire 4 and the clamping groove 331 are engaged with each other, making the connection between the wire 4 and the connecting sleeve 3 stable. At the same time, after the connecting sleeve 3 enters the locking groove 23, the part of the pressing wire end 41 passing through the card slot will be located between the fixed area 33 and the inner wall of the locking groove 23, which will further lock and fix the wire 4. At the same time, during the process of pulling the connecting sleeve 3 into the locking groove 23, the staff can also use tools to push the connecting sleeve 3; Meanwhile, after the connecting sleeve 3 enters the locking groove 23, the pressing piece 34 above the fixing area 33 will also be pressed by the inner wall of the locking groove 23, squeezing the pressed wire end 41 in the positioning depression 332, increasing the friction between the pressed wire end 41 and the fixing area 33, pressing the wire 4, making it difficult for the pressed wire end 41 and the wire 4 to break away from the connecting sleeve 3, and improving the connection effect and self-locking effect of the wire 4; Since the elastic strip 341 is made of magnetic rubber strip, when the pressed wire end 41 is snapped into the clamping groove 331 and the connecting sleeve 3 has not entered the locking groove 23, the pressing piece 34 can closely adhere to the surface of the fixing area 33 under the magnetic action of the elastic strip 341, and the pressed wire end 41 is squeezed and fixed; Meanwhile, after the connecting sleeve 3 enters the locking groove 23, the pressing piece 34 will be pressed by the inner wall of the locking groove 23, causing the elastic strip 341 to further squeeze the pressed wire end 41 and deforming the elastic strip 341 to fill the gap between the pressed wire end 41 and the positioning depression 332; By roughening the surfaces of the fixing area 33 and the positioning depression 332 to make their surface roughness relatively large, and cooperating with the elastic strip 341 to increase the friction force on the pressed wire end 41; When the connecting sleeve 3 is installed on the wire 4, the smooth contact section I will closely adhere to the surface of the wire 4, making the contact between the connecting sleeve 3 and the wire 4 sufficient and the contact area relatively large. Cooperating with the contact and extrusion between the connecting sleeve 3 and the inner wall of the locking groove 23, the wire 4 and the wiring table support 2 are in full contact; Meanwhile, by setting the end of the contact elastic piece 32 close to the fixed copper piece 22 as the anti-slip section II and arranging the clamping block 321 on the anti-slip section II, after the connecting sleeve 3 is snapped into the locking groove 23 and the inner wall of the locking groove 23 presses the contact elastic piece 32, the clamping block 321 further presses and clamps the wire 4, increasing the friction force between the wire 4 and the connecting sleeve 3; Meanwhile, since the clamping block 321 is made of bimetallic sheet, when the wire 4 is energized and heated or the ambient temperature rises, the bimetallic sheet making up the clamping block 321 will further deform, causing the clamping block 321 to further press and clamp the wire 4; When the connecting sleeve 3 is snapped into the locking groove 23, the positioning protrusion 311 on the connecting sleeve 3 will snap into the pressing groove 24 to fix the relative angle of the connecting sleeve 3 in the locking groove 23, preventing the connecting sleeve 3 from sliding or rotating. At the same time, through the arranged positioning protrusion 311, it is convenient for the staff to observe the installation position of the connecting sleeve 3 in the locking groove 23 from the pressing groove 24, ensuring that the connecting sleeve 3 and the wire 4 are fully fixed in the locking groove 23; After the connecting sleeve 3 is installed into the locking groove 23, the staff installs the reinforcing bolt 26 into the installation groove 25 on the clamping seat 21 through a tool, so that the reinforcing bolt 26 contacts the end of the connecting sleeve 3 facing the fixed copper sheet 22, thereby preventing the connecting sleeve 3 from moving towards the fixed copper sheet 22, that is, the wire 4 and the connecting sleeve 3 cannot be loosened from the locking groove 23; Since the lower end of the reinforcing bolt 26 is a conical surface 261, during the process of installing the reinforcing bolt 26 into the installation groove 25, the conical surface 261 at the lower end of the reinforcing bolt 26 will first contact the side surface of the connecting sleeve 3 facing the fixed copper sheet 22, so that as the reinforcing bolt 26 is screwed in, the connecting sleeve 3 moves in the direction away from the fixed copper sheet 22, increasing the clamping effect between the connecting sleeve 3 and the locking groove 23, that is, improving the fixing effect on the wire 4; At the same time, since a retaining piece 262 is installed on the conical surface 261, when the reinforcing bolt 26 is screwed in, the retaining piece 262 will be squeezed by the end surface of the connecting sleeve 3 facing the fixed copper sheet 22 and fit onto the conical surface 261, which does not affect the screwing in of the reinforcing bolt 26. When the reinforcing bolt 26 is unscrewed from the installation groove 25 in the reverse direction, the retaining piece 262 will be blocked by the end surface of the connecting sleeve 3 facing the fixed copper sheet 22, so that the reinforcing bolt 26 cannot be smoothly withdrawn from the installation groove 25.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking wiring support for an electric energy meter, comprising an electric energy meter body (1), the electric energy meter body (1) being provided with a wiring slot (11), a gland (12) being installed on the wiring slot (11), a wiring support (2) being installed in the wiring slot (11), and a wire (4) being installed on the wiring support (2); Features: The wiring meter support (2) comprises a card seat (21) and a fixed copper sheet (22) connected to each other, and the fixed copper sheet (22) is connected to the circuit in the electric energy meter body (1); The holder (21) is provided with a locking groove (23) and a pressing groove (24), the pressing groove (24) and the locking groove (23) are communicated with each other, and the width of the pressing groove (24) is greater than or equal to the diameter of the wire (4); A connecting sleeve (3) is installed on the wire (4), the connecting sleeve (3) and the locking groove (23) are conical in shape, the connecting sleeve (3) is squeezed by the inner wall of the locking groove (23), and the diameter of one end of the locking groove (23) close to the fixed copper sheet (22) is larger than the diameter of the other end; The connecting sleeve (3) comprises a mounting ring (31) and a contact spring (32), wherein the contact spring (32) is evenly arranged in a plurality of groups, wherein the contact spring (32) contacts the surface of the wire (4) with each other, wherein the end of the contact spring (32) close to the fixed copper sheet (22) is provided with a fixing area (33), wherein the fixing area (33) is provided with a clamping groove (331), and the end of the wire (4) facing the fixed copper sheet (22) is provided with a clamping wire end (41), wherein the clamping wire end (41) is folded and clamped into the clamping groove (331).

2. According to claim 1, the self-locking connection holder of the electric energy meter is characterized in that: An extrusion sheet (34) is installed on the connecting sleeve (3), the extrusion sheet (34) is located above the fixing area (33), and one end of the extrusion sheet (34) facing the fixing copper sheet (22) is in a free state; A positioning recess (332) is provided on the surface of the fixing area (33), the end of the pressing line end (41) is located in the positioning recess (332), and the pressing sheet (34) presses the pressing line end (41).

3. According to claim 2, a self-locking connection holder for an electric energy meter is characterized in that: An elastic strip (341) is installed on the extrusion sheet (34), the elastic strip (341) is made of a magnetic rubber strip, and the elastic strip (341) is located between the extrusion sheet (34) and the fixing area (33).

4. According to claim 3, the self-locking connection holder of the electric energy meter is characterized in that: The surfaces of the fixing area (33) and the positioning recess (332) are roughened.

5. The self-locking connection holder of an electric energy meter according to claim 1, characterized in that: The end of the contact spring (32) close to the fixed copper sheet (22) is the anti-slip section (II), and the end of the contact spring (32) away from the fixed copper sheet (22) is the contact section (I). The surface of the contact section (I) is in direct contact with the surface of the wire (4). The anti-slip section (II) is provided with evenly distributed clamping blocks (321). The cross section of the clamping blocks (321) is triangular, and the clamping blocks (321) are pressed tightly against the surface of the wire (4). The clamping block (321) is made of a bimetallic sheet.

6. The self-locking connection holder of an electric energy meter according to claim 1, characterized in that: The mounting ring (31) is provided with positioning protrusions (311), the positioning protrusions (311) are arranged in pairs, the distance between the positioning protrusions (311) is equal to the width of the pressing groove (24), and the positioning protrusions (311) are in contact with the side walls of the pressing groove (24).

7. The self-locking connection holder of an electric energy meter according to claim 1, characterized in that: The base (21) is provided with a mounting groove (25), a reinforcing bolt (26) is installed in the mounting groove (25), and the reinforcing bolt (26) and one end of the connecting sleeve (3) facing the fixed copper sheet (22) are in contact with each other.

8. The self-locking connection holder of an electric energy meter according to claim 7, characterized in that: The lower end of the reinforcing bolt (26) is a conical surface (261), and a blocking piece (262) is installed on the conical surface (261).

Images