An electronic prepaid electric energy meter

Abstract

The present invention discloses an electronic prepaid electric energy meter, comprising an electric energy meter body, a base, a connecting assembly and a positioning mechanism, wherein one side of the base is used to be connected to a wall, the positioning mechanism is connected to the side of the base away from the wall, one end of the connecting assembly is slidably connected to the side of the base away from the wall, the connecting assembly is arranged to pass through the positioning mechanism, the electric energy meter body is connected to the end of the connecting assembly away from the wall, and the end of the connecting assembly close to the wall is detachably connected to the positioning mechanism when it slides to the positioning mechanism, and when the electric energy meter body slides to the positioning mechanism with the connecting assembly and is connected to the positioning mechanism, the positioning mechanism provides a space for adjusting the position of the electric energy meter body. The present invention has the effect of facilitating workers to record the display information of the electric energy meter.

Description

Technical Field

[0001] The invention relates to the field of electricity consumption data recording instruments, in particular to an electronic prepaid electric energy meter. Background Art

[0002] An electric energy meter is an instrument used to measure electric energy. It is also called an electric meter, a fire meter, or a kilowatt-hour meter. It refers to an instrument that measures various electrical quantities.

[0003] In the related art, the electric energy meter of the building is fixed on the wall of the stairs. For the sake of aesthetics or to prevent the electric energy meter from being damaged by human beings, the electric energy meter is far away from the ground of the stairwell and is installed near the corner or corner of the wall.

[0004] With respect to the above-mentioned related technologies, the inventor believes that when workers record the data of the electricity meter, they need to approach the electricity meter and observe it. However, since the installation position of the electricity meter is close to the corner of the wall and high above the ground, and the electricity meter is fixed to the wall, it is not easy for workers to observe the display screen of the electricity meter, resulting in the defect of inconvenience for workers to record the display information of the electricity meter. Summary of the invention

[0005] In order to facilitate workers to record the displayed information of the electric energy meter, the present application discloses an electronic prepaid electric energy meter.

[0006] In the first aspect, the present application discloses an electronic prepaid energy meter, which adopts the following technical solution:

[0007] An electronic prepaid electric energy meter comprises an electric energy meter body, a base, a connecting component and a positioning mechanism, wherein one side of the base is used to be connected to a wall, the positioning mechanism is connected to the side of the base facing away from the wall, one end of the connecting component is slidably connected to the side of the base facing away from the wall, the connecting component is arranged to pass through the positioning mechanism, the electric energy meter body is connected to the end of the connecting component away from the wall, and the end of the connecting component close to the wall is detachably connected to the positioning mechanism when it slides to the positioning mechanism, and the positioning mechanism is used to provide space for adjusting the position of the electric energy meter body when the electric energy meter body slides to the positioning mechanism along with the connecting component and is connected to the positioning mechanism.

[0008] By adopting the above technical solution, before observing the display screen of the electricity meter, the worker first pulls the electricity meter body, so that the electricity meter body drives the connecting assembly to slide and connect with the positioning mechanism, and then adjusts the appropriate position under the positioning mechanism, so that the distance of the electricity meter body is closer to the worker, so that the worker can observe the display screen and thus record the display information of the electricity meter.

[0009] Optionally, the connecting assembly includes a connecting rod and a connecting head, one end of the connecting rod is connected to the side of the electric energy meter body close to the wall, and the connecting head is fixed to the end of the connecting rod away from the electric energy meter body, the connecting rod and the connecting head both pass through the middle of the positioning mechanism and are slidably connected to the side of the base away from the wall, the connecting rod is slidably connected to the positioning mechanism, and the connecting head is interference fit with the positioning mechanism to achieve a detachable connection.

[0010] By adopting the above technical solution, when the connector slides to the adjustment mechanism, a quick detachable connection is completed through interference fit, thereby making it convenient for workers to quickly adjust the position of the electric energy meter body, thereby making it convenient for workers to record the display information of the electric energy meter.

[0011] Optionally, the positioning mechanism includes a sliding assembly and a rotating assembly, the sliding assembly is rotatably connected to the side of the base facing away from the wall through the rotating assembly, the rotating assembly is located in the middle of the side of the sliding assembly close to the base, the connecting rod passes through the sliding assembly and the rotating assembly and is slidably connected to the sliding assembly and the rotating assembly, and when the connecting head slides to the sliding assembly, the connecting head and the sliding assembly are detachably connected by an interference fit; the sliding assembly is used to provide space for the connecting head to slide along the same plane.

[0012] By adopting the above technical solution, the connector can slide to the sliding component to adjust the position, and then the electric energy meter body can also adjust the position accordingly. In addition, in conjunction with the rotating component, a larger adjustment space is provided, making it easier for the electric energy meter body to approach the workers, thereby facilitating the workers to record the display information of the electric energy meter.

[0013] Optionally, the sliding assembly includes a turntable and a sliding block, one side of the turntable is connected to an end of the rotating assembly away from the wall, for realizing a rotational connection between the turntable and the base, four sliding holes are provided on the side of the turntable away from the wall, one end of the four sliding holes is connected to each other and is located at the center of the turntable, for making the four sliding holes form a cross-shaped hole, the sliding block is slidably connected to the sliding hole, the hole wall of the sliding hole close to the sliding block is provided with a limiting groove, the sliding block is surrounded by a circle of extending protrusions, the extending protrusions are slidably connected in the limiting groove, for making the sliding block limited to slide in the cross-shaped hole;

[0014] The connecting rod passes through the center of the sliding block and is slidably connected to the sliding block. A clamping groove for a connecting head to be clamped is provided on the side of the sliding block close to the base. The connecting head and the clamping groove are interference fit.

[0015] By adopting the above technical solution, the connector can be inserted into the snap-in groove, and its position can be adjusted along the cross-shaped hole along with the sliding block, and more position options can be achieved in conjunction with the rotating component, thereby making it easier for workers to record the display information of the electricity meter.

[0016] Optionally, the rotating assembly includes a fixed sleeve, a connecting tube and a coil spring, one end of the connecting tube is rotatably connected to the side of the base facing away from the wall, the side of the turntable close to the wall is connected to the other end of the connecting tube, the inner diameter of the connecting tube is larger than the diameter of the connecting rod and the diameter of the connecting head, the connecting rod is arranged through the connecting tube, the fixed sleeve is fixed to the side of the base facing away from the wall, the connecting tube is arranged through the fixed sleeve, the coil spring is sleeved on the outer wall of the connecting tube and is located in the fixed sleeve, and the two ends of the coil spring are respectively connected to the outer wall of the connecting tube and the inner wall of the fixed sleeve.

[0017] By adopting the above technical solution, the turntable can rotate with the connecting pipe and is limited by the coil spring during rotation, which is beneficial to quickly adjust the position of the electric energy meter body on the one hand, and to quickly reset the position of the turntable on the other hand.

[0018] Optionally, a first locking component and a driving member are installed in the base, wherein the first locking component is connected to the driving member, and the driving member is close to the wall and is used to drive the first locking component to approach or move away from the turntable, and the working part of the first locking component extends out of the base and is detachably connected to the turntable.

[0019] By adopting the above technical solution, when the turntable needs to be locked, the driving member is controlled to drive the first locking component close to the turntable, and then the first locking component is controlled to lock the turntable, so as to free the workers' hands and provide convenience for recording data.

[0020] Optionally, the first locking assembly includes a first support frame, a first screw rod, a first guide rod, a first motor and two first clamping rods, the first support frame is connected to the driving member and is located between the turntable and the driving member, the first screw rod is rotatably connected to the first support frame, the first guide rod is connected to the first support frame, the first screw rod and the first guide rod are parallel to each other and are both vertically arranged, the first motor is installed on the first support frame and the output shaft of the first motor is connected to one end of the first screw rod, one end of the two first clamping rods is slidably connected to the first guide rod and is threadedly connected to the first screw rod, the first screw rod is arranged with positive and negative threads, and the two first clamping rods are respectively close to the two ends of the first support frame, the first clamping rod is perpendicular to the first screw rod and close to the turntable, and a circle of clamping grooves is provided on the side of the turntable close to the base for the first clamping rod to be inserted for clamping the turntable.

[0021] By adopting the above technical solution, when it is necessary to limit the rotation angle of the turntable, the driving member is controlled so that the first support frame is close to the turntable, driving the two first clamping rods to be inserted into the clamping grooves, and then the first motor is controlled. The output shaft of the first motor drives the first screw rod to rotate, and then drives the two first clamping rods to approach each other and clamp the turntable, thereby facilitating and quickly limiting the rotation angle of the turntable and providing convenience for workers.

[0022] Optionally, a second locking assembly is installed in the base, the second locking assembly is detachably connected to the driving member, and a working portion of the second locking assembly is arranged to extend out of the base and is used to clamp or release the turntable.

[0023] By adopting the above technical solution, the detachable connection between the second locking component and the driving member provides convenience for whether to select the second locking component. When the rotation angle of the turntable is large, a greater force is required to limit the turntable, and the second locking component is selected, so that the second locking component and the first locking component can clamp the turntable together, thereby facilitating and quickly limiting the rotation angle of the turntable, providing convenience for workers.

[0024] Optionally, the second locking assembly includes a second support frame, a second screw rod, a second guide rod, a second motor and two second clamping rods, the second support frame is slidably connected to the base and is perpendicular to the first support frame, the second support frame is detachably connected to the driving member through a control assembly, the second support frame is located between the first support frame and the side of the base close to the wall, the second screw rod is rotatably connected to the second support frame, the second guide rod is connected to the second support frame, the second screw rod and the second guide rod are parallel to each other and are both vertically arranged, the second motor is installed on the second support frame and the output shaft of the second motor is connected to one end of the second screw rod, one end of the two second clamping rods is slidably connected to the second guide rod and is threadedly connected to the second screw rod, the second screw rod is arranged with positive and negative threads, and the two second clamping rods are respectively close to the two ends of the second support frame, the second clamping rod is perpendicular to the second screw rod and close to the turntable; when the second locking assembly is used and the first clamping rod is inserted into the clamping groove, the second clamping rod is also arranged to be inserted into the clamping groove.

[0025] By adopting the above technical solution, the detachable connection between the second support frame and the driving member provides convenience for whether to select the second locking assembly. When the rotation angle of the turntable is large, a larger force is required to limit the turntable, and the second locking assembly is selected. The control assembly connects the second support frame to the driving member, and then the second clamping rod and the first clamping rod are inserted into the clamping groove at the same time, and then the second motor and the first motor are controlled so that the second locking assembly and the first locking assembly clamp the turntable together, thereby facilitating and quickly limiting the rotation angle of the turntable, providing convenience for workers.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Before observing the display screen of the electric energy meter, the worker first pulls the electric energy meter body so that the electric energy meter body drives the connecting assembly to slide and connect with the adjustment mechanism, and then adjusts the appropriate position under the adjustment mechanism so that the electric energy meter body is closer to the worker, so that the worker can observe the display screen and record the display information of the electric energy meter.

[0028] 2. The connector can be inserted into the card slot, and the position can be adjusted along the cross-shaped hole along with the sliding block, and more position options can be achieved with the rotating component, making it easier for workers to record the display information of the electric energy meter.

[0029] 3. When it is necessary to limit the rotation angle of the turntable, control the driving member so that the first support frame is close to the turntable, driving the two first clamping rods to be inserted into the clamping grooves, and then control the first motor. The output shaft of the first motor drives the first screw rod to rotate, and then drives the two first clamping rods to approach each other and clamp the turntable, so as to quickly and easily limit the rotation angle of the turntable and provide convenience for the workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a cross-sectional view of an electronic prepaid electricity meter in an embodiment of the present application.

[0031] Figure 2 This is a cross-sectional view from another angle of an electronic prepaid electricity meter in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 1. Electric energy meter body; 2. Base; 3. Connecting assembly; 31. Connecting rod; 32. Connecting head; 4. First cylinder; 5. Sliding assembly; 51. Turntable; 52. Sliding block; 6. Rotating assembly; 61. Fixed sleeve; 62. Connecting pipe; 63. Coil spring; 7. Sliding hole; 8. Extended protrusion; 9. Universal ball; 10. First locking assembly; 101. First support frame; 102. First screw rod; 103. First guide rod; 104. First motor; 105. First clamping rod; 11. Second cylinder; 12. Connecting strip; 13. Second locking assembly; 131. Second support frame; 132. Second screw rod; 133. Second guide rod; 134. Second motor; 135. Second clamping rod; 14. Third cylinder; 15. Horizontal rod; 16. Limit plate. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-2 This application is described in further detail.

[0035] Reference Figure 1 , an embodiment of the present application discloses an electronic prepaid electricity meter.

[0036] An electronic prepaid electric energy meter comprises an electric energy meter body 1, a base 2, a connecting component 3 and a positioning mechanism. The base 2 is arranged in a square box shape, and one side of the base 2 is used to be connected to a wall. The positioning mechanism is connected to the middle of the side of the base 2 facing away from the wall, and one end of the connecting component 3 passes through the middle of the positioning mechanism and is slidably connected to the side of the base 2 facing away from the wall. The electric energy meter body 1 is connected to the end of the connecting component 3 away from the wall, so that the positioning component is located between the electric energy meter body 1 and the base 2. When the end of the connecting component 3 close to the wall slides to the positioning mechanism, it is detachably connected to the positioning mechanism, and the positioning mechanism is used to provide space for adjusting the position of the connecting component 3 and the electric energy meter body 1.

[0037] The connection assembly 3 includes a connection rod 31 and a connection head 32. A groove for inserting the connection rod 31 and the connection head 32 is provided in the middle of the side of the base 2 facing away from the wall. The connection head 32 is slidably connected in the groove. One end of the connection rod 31 is fixedly connected to the side of the groove bottom of the connection head 32 facing away from the groove. The side of the electric energy meter body 1 close to the wall is connected to the end of the connection rod 31 extending out of the groove. The connection rod 31 and the groove are both arranged horizontally. The connection rod 31 and the connection head 32 both pass through the middle of the positioning mechanism. The connection rod 31 is slidably connected to the positioning mechanism, and the connection head 32 is interference fit with the positioning mechanism to achieve a detachable connection.

[0038] In order to effectively limit the position of the electric energy meter body 1 when there is no need to record data, a first cylinder 4 is also connected to the base 2, and the piston rod of the first cylinder 4 faces the groove and is close to the bottom of the groove. The groove wall is provided with a through hole for the piston rod of the first cylinder 4 to pass through, and the side wall of the connecting head 32 close to the first cylinder 4 is provided with a locking groove for the piston rod of the first cylinder 4 to be inserted.

[0039] The position adjustment mechanism includes a sliding assembly 5 and a rotating assembly 6, one end of the rotating assembly 6 is rotatably connected to the side of the base 2 away from the wall, and the middle of the sliding assembly 5 close to the base 2 is connected to the end of the rotating assembly 6 away from the base 2. The connecting rod 31 passes through the sliding assembly 5 and the rotating assembly 6 and is slidingly connected with the sliding assembly 5 and the rotating assembly 6. When the connecting head 32 passes through the rotating assembly 6 and slides to the sliding assembly 5, the connecting head 32 is detachably connected to the sliding assembly 5 by interference fit. The sliding assembly 5 is used to provide space for the connecting head 32 to slide along the same plane, so that the connecting rod 31 and the electric energy meter body 1 can both achieve position adjustment.

[0040] The rotating assembly 6 includes a fixed sleeve 61, a connecting pipe 62 and a coil spring 63. The connecting pipe 62 is arranged horizontally, and one end of the connecting pipe 62 is rotatably connected to the middle of the side of the base 2 away from the wall. The connecting pipe 62 faces the groove and has a diameter larger than the diameter of the groove. The side of the sliding assembly 5 close to the wall is connected to the end of the connecting pipe 62 away from the base 2. The inner diameter of the connecting pipe 62 is larger than the diameter of the connecting rod 31 and the diameter of the connector 32, and the connecting rod 31 passes through the connecting pipe 62. One end of the fixed sleeve 61 is fixed to the side of the base 2 away from the wall, and the connecting pipe 62 passes through the fixed sleeve 61. The central axes of the fixed sleeve 61, the connecting pipe 62 and the connecting rod 31 are located on the same straight line. The coil spring 63 is sleeved on the outer wall of the connecting pipe 62 and is located in the fixed sleeve 61. The two ends of the coil spring 63 are respectively connected to the outer wall of the connecting pipe 62 and the inner wall of the fixed sleeve 61. It should be noted that the sliding assembly 5 can only rotate in one direction, and the rotation angle is between 0 and 360 degrees.

[0041] The sliding assembly 5 includes a rotating disk 51 and a sliding block 52. The rotating disk 51 is parallel to the side of the base 2 away from the wall. One side of the rotating disk 51 is fixedly connected to the end of the connecting pipe 62 away from the wall, which is used to realize the rotation connection between the rotating disk 51 and the base 2. Four sliding holes 7 are opened on the side of the rotating disk 51 away from the wall. One end of the four sliding holes 7 is connected to each other and located at the center of the rotating disk 51. The four sliding holes 7 form a cross-shaped hole. The sliding block 52 is slidably connected to the sliding hole 7. The hole wall of the sliding hole 7 close to the sliding block 52 is opened with a limiting groove. The sliding block 52 is surrounded by a circle of extending protrusions 8. The extending protrusions 8 are slidably connected in the limiting groove, so that the sliding block 52 is limited to slide in the cross-shaped hole. The connecting rod 31 passes through the center of the sliding block 52 and is slidably connected to the sliding block 52. The side of the sliding block 52 close to the base 2 is opened with a clamping groove for the connector 32 to clamp. The connector 32 and the clamping groove are interference fit.

[0042] In order to further facilitate workers to observe the display screen of the electricity meter body 1, a universal ball 9 is installed in the middle of the side of the electricity meter body 1 close to the base 2. The universal ball 9 and the electricity meter body 1 are restrained by friction, and the end of the connecting rod 31 away from the base 2 is fixedly connected to the universal ball 9.

[0043] In order to effectively limit the rotation angle of the turntable 51, a first locking assembly 10 and a driving member are installed in the base 2. The driving member is a second cylinder 11. The first locking assembly 10 is connected to the second cylinder 11. The second cylinder 11 is close to the wall and is used to drive the first locking assembly 10 close to or away from the turntable 51. The working part of the first locking assembly 10 extends out of the base 2 and is detachably connected to the turntable 51.

[0044] Specifically, the first locking assembly 10 includes a first support frame 101, a first screw rod 102, a first guide rod 103, a first motor 104 and two first clamping rods 105. The first support frame 101 is fixedly connected to the piston rod of the second cylinder 11 through a connecting strip 12. The length direction of the connecting strip 12, the length direction of the piston rod of the second cylinder 11 and the length direction of the connecting rod 31 are consistent. The first support frame 101 is located between the turntable 51 and the second cylinder 11. The first screw rod 102 is rotatably connected to the first support frame 101. The first guide rod 103 is connected to the first support frame 101. The first screw rod 102 and the first guide rod 103 are parallel to each other and are both vertically arranged. The first motor 104 is installed on the first support frame 101 and the output shaft of the first motor 104 is connected to one end of the first screw rod 102, which is used to drive the first screw rod 102 to rotate. One end of the two first clamping rods 105 is slidably connected to the first guide rod 103, and the first screw rod 102 is arranged in a positive and negative thread, that is, it includes a positive thread section and a negative thread section. The two first clamping rods 105 are respectively threadedly connected to the thread section and the negative thread section, and the two first clamping rods 105 are respectively close to the two ends of the first support frame 101, and the first clamping rods 105 are perpendicular to the first screw rod 102 and close to the turntable 51. A circle of clamping grooves is provided on the side of the turntable 51 close to the base 2 for the first clamping rods 105 to be inserted, so as to clamp the turntable 51.

[0045] Reference Figure 1 and Figure 2 In order to more stably limit the rotation of the turntable 51 when the rotation angle of the turntable 51 is greater than 180 degrees, a second locking component 13 is installed in the base 2. The second locking component 13 is detachably connected to the connecting strip 12. The working part of the second locking component 13 is arranged to extend out of the base 2 and is used to clamp or release the turntable 51.

[0046] Reference Figure 1 and Figure 2The second locking assembly 13 includes a second support frame 131, a second screw rod 132, a second guide rod 133, a second motor 134 and two second clamping rods 135. The second support frame 131 is slidably connected to the base 2 through a horizontal rod 15 and is perpendicular to the first support frame 101. The second support frame 131 is detachably connected to the connecting bar 12 through a control assembly. The control assembly includes a third cylinder 14 and a plug-in bar. The third cylinder 14 is fixed to the second support frame 131 and is close to the connecting bar 12. The plug-in bar is fixed to the end of the piston rod of the third cylinder 14. When the connecting bar 12 is in the initial position, a plug-in slot for inserting the plug-in bar is provided relative to the plug-in bar. The second support frame 131 is located between the first support frame 101 and the side surface of the base 2 close to the wall, the second screw rod 132 is rotatably connected to the second support frame 131, the second guide rod 133 is connected to the second support frame 131, the second screw rod 132 and the second guide rod 133 are parallel to each other and are both vertically arranged, the second motor 134 is installed on the second support frame 131 and the output shaft of the second motor 134 is connected to one end of the second screw rod 132, one end of the two second clamping rods 135 is slidably connected to the second guide rod 133 and is threadedly connected to the second screw rod 132, the second screw rod 132 is arranged with positive and negative threads, the two second clamping rods 135 are respectively close to the two ends of the second support frame 131, the second clamping rod 135 is perpendicular to the second screw rod 132 and close to the turntable 51; when the second locking assembly 13 is used and the first clamping rod 105 is inserted into the clamping groove, the second clamping rod 135 is also inserted into the clamping groove.

[0047] Reference Figure 1 and Figure 2 It should be noted that, in the initial position, the plug-in slot of the connecting strip 12 is opposite to the plug-in strip, and the horizontal rod 15 is fixed with a limiting plate 16 to make the initial position of the second support frame 131 match the initial position of the connecting strip 12.

[0048] The implementation principle of an electronic prepaid electricity meter in the embodiment of the present application is: when a worker needs to observe the display screen of the electricity meter body 1 and record data, he first controls the first cylinder 4, the piston rod of the first cylinder 4 is shortened, so that the connecting head 32 is unlocked, and then the electricity meter body 1 is pulled to make the connecting head 32 snap into the snap-in groove, and then the position of the electricity meter body 1 is moved. During the movement, the connecting head 32 is driven by the sliding block 52 to slide in the sliding hole 7. At this time, the worker can also rotate the turntable 51, and after adjusting it to the most suitable position, control the first locking component 10 and the second locking component 13 to lock the turntable 51, so as to facilitate the worker to record data.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electronic prepaid energy meter, characterized in that: The utility model comprises an electric energy meter body (1), a base (2), a connecting component (3) and a positioning mechanism, wherein one side of the base (2) is used for connecting to a wall, the positioning mechanism is connected to the side of the base (2) facing away from the wall, one end of the connecting component (3) is slidably connected to the side of the base (2) facing away from the wall, the connecting component (3) is arranged to pass through the positioning mechanism, the electric energy meter body (1) is connected to the end of the connecting component (3) away from the wall, and the end of the connecting component (3) close to the wall slides to the positioning mechanism and is detachably connected to the positioning mechanism, so that when the electric energy meter body (1) slides to the positioning mechanism along with the connecting component (3) and is connected to the positioning mechanism, the positioning mechanism provides space for adjusting the position of the electric energy meter body (1); The connection assembly (3) comprises a connection rod (31) and a connection head (32), one end of the connection rod (31) being connected to the side of the electric energy meter body (1) close to the wall, the connection head (32) being fixed to the end of the connection rod (31) away from the electric energy meter body (1), the connection rod (31) and the connection head (32) both passing through the middle of the positioning mechanism and being slidably connected to the side of the base (2) away from the wall, the connection rod (31) being slidably connected to the positioning mechanism, the connection head (32) being interference fit with the positioning mechanism, and being used to achieve a detachable connection, a universal ball (9) being installed in the middle of the side of the electric energy meter body (1) close to the base (2), the universal ball (9) and the electric energy meter body (1) being limited by friction, and the end of the connection rod (31) away from the base (2) being fixedly connected to the universal ball (9); The positioning mechanism comprises a sliding assembly (5) and a rotating assembly (6); the sliding assembly (5) is rotatably connected to the side of the base (2) facing away from the wall through the rotating assembly (6); the rotating assembly (6) is located in the middle of the side of the sliding assembly (5) close to the base (2); the connecting rod (31) passes through the sliding assembly (5) and the rotating assembly (6) and is slidably connected to the sliding assembly (5) and the rotating assembly (6); when the connecting head (32) slides onto the sliding assembly (5), the connecting head (32) and the sliding assembly (5) are detachably connected by means of interference fit; the sliding assembly (5) is used to provide a space for the connecting head (32) to slide along the same plane; The sliding assembly (5) comprises a rotating disk (51) and a sliding block (52), one side of the rotating disk (51) is connected to an end of the rotating assembly (6) away from the wall, and is used to realize the rotation connection between the rotating disk (51) and the base (2), and the side of the rotating disk (51) away from the wall is provided with four sliding holes (7), one end of the four sliding holes (7) is connected to each other and is located at the center of the rotating disk (51), and is used to make the four sliding holes (7) form a cross-shaped hole, and the sliding block (52) is slidingly connected to the sliding hole (7), and the hole wall of the sliding hole (7) close to the sliding block (52) is provided with a limiting groove, and the sliding block (52) is surrounded by a circle of extending protrusions (8), and the extending protrusions (8) are slidingly connected in the limiting groove, and are used to make the sliding block (52) slide in the cross-shaped hole; The connecting rod (31) passes through the center of the sliding block (52) and is slidably connected to the sliding block (52); a clamping groove for clamping the connecting head (32) is provided on the side of the sliding block (52) close to the base (2); the connecting head (32) and the clamping groove are interference fit; The rotating assembly (6) comprises a fixed sleeve (61), a connecting pipe (62) and a coil spring (63); one end of the connecting pipe (62) is rotatably connected to the side of the base (2) facing away from the wall; the side of the rotating disk (51) close to the wall is connected to the other end of the connecting pipe (62); the inner diameter of the connecting pipe (62) is larger than the diameter of the connecting rod (31) and the diameter of the connecting head (32); the connecting rod (31) is arranged to pass through the connecting pipe (62); the fixed sleeve (61) is fixed to the side of the base (2) facing away from the wall; the connecting pipe (62) is arranged to pass through the fixed sleeve (61); the coil spring (63) is sleeved on the outer wall of the connecting pipe (62) and is located in the fixed sleeve (61); and the two ends of the coil spring (63) are respectively connected to the outer wall of the connecting pipe (62) and the inner wall of the fixed sleeve (61); A first locking assembly (10) and a driving member are installed in the base (2), the first locking assembly (10) is connected to the driving member, the driving member is close to the wall and is used to drive the first locking assembly (10) to approach or move away from the turntable (51), and the working part of the first locking assembly (10) extends out of the base (2) and is detachably connected to the turntable (51); The first locking assembly (10) comprises a first support frame (101), a first screw rod (102), a first guide rod (103), a first motor (104) and two first clamping rods (105); the first support frame (101) is connected to the driving member and is located between the rotating disk (51) and the driving member; the first screw rod (102) is rotatably connected to the first support frame (101); the first guide rod (103) is connected to the first support frame (101); the first screw rod (102) and the first guide rod (103) are parallel to each other and are both vertically arranged; the first motor (104) is installed on the first support frame (101) and the first motor (104) is connected to the first guide rod (103); The output shaft of the machine (104) is connected to one end of the first screw rod (102), one end of the two first clamping rods (105) is slidably connected to the first guide rod (103) and is threadedly connected to the first screw rod (102), the first screw rod (102) is arranged in a forward and reverse thread, the two first clamping rods (105) are respectively close to the two ends of the first support frame (101), the first clamping rod (105) is perpendicular to the first screw rod (102) and close to the turntable (51), and a circle of clamping grooves is provided on the side of the turntable (51) close to the base (2) for the first clamping rod (105) to be inserted so as to clamp the turntable (51).

2. The electronic prepaid energy meter according to claim 1, characterized in that: A second locking assembly (13) is installed in the base (2), the second locking assembly (13) is detachably connected to the driving member, and a working portion of the second locking assembly (13) is arranged to extend out of the base (2) and is used to clamp or release the turntable (51).

3. The electronic prepaid energy meter according to claim 2, characterized in that: The second locking assembly (13) comprises a second support frame (131), a second screw rod (132), a second guide rod (133), a second motor (134) and two second clamping rods (135); the second support frame (131) is slidably connected to the base (2) and is perpendicular to the first support frame (101); the second support frame (131) is detachably connected to the driving member via a control assembly; the second support frame (131) is located between the first support frame (101) and the side of the base (2) close to the wall; the second screw rod (132) is rotatably connected to the second support frame (131); the second guide rod (133) is connected to the second support frame (131); the second screw rod (132) and the second guide rod (133) are parallel to each other. The second motor (134) is mounted on the second support frame (131) and the output shaft of the second motor (134) is connected to one end of the second screw rod (132). One end of the two second clamping rods (135) is slidably connected to the second guide rod (133) and is threadedly connected to the second screw rod (132). The second screw rod (132) is arranged with positive and negative threads. The two second clamping rods (135) are respectively close to the two ends of the second support frame (131). The second clamping rod (135) is perpendicular to the second screw rod (132) and close to the turntable (51). When the second locking assembly (13) is used and the first clamping rod (105) is inserted into the clamping groove, the second clamping rod (135) is also inserted into the clamping groove.

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