Electromagnetic relay and intelligent instrument

Abstract

The invention discloses an electromagnetic relay and an intelligent instrument, and relates to the technical field of electromagnetic relays, and the electromagnetic relay comprises an L-shaped frame, the L-shaped frame is rotatably provided with a rotating plate, the L-shaped frame is movably provided with a protection shell, one side of the rotating plate is provided with a fixed contact, and the L-shaped frame is movably provided with a pressing cylinder. According to the electromagnetic relay, through the arrangement of the spherical block, the piston, the pressing cylinder, the limiting separation blade and the like, resetting is achieved through the pressure of resetting gas, mechanical abrasion is avoided, the service life of the relay is prolonged, and the electromagnetic relay is suitable for being used in a small-angle rotating process. By using the reset force adjusting device, the magnitude of the reset force can be flexibly adjusted according to different use situations, the adaptability of the relay is improved, buffering is performed through the change of the gas flow, the impact with a fixed contact is reduced, and the service life of the electromagnetic relay is further prolonged; and the intelligent instrument provided with the electromagnetic relay has wide applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic relays, in particular to electromagnetic relays and intelligent meters. Background Art

[0002] An electromagnetic relay is an automatic switching device that uses the principle of electromagnetic induction to control the on and off of contacts through electromagnets, thereby controlling high-voltage, high-current circuits with low-voltage, low-current circuits. The invention patent with Chinese patent publication number CN109997209A discloses an electromagnetic relay and an intelligent meter, which includes a box-shaped insulating housing with a storage portion inside, a plate-shaped fixed contact side terminal fixed to the housing, extending from the outside of the housing to the storage portion, and having a fixed contact located in the storage portion, and a plate-shaped movable contact side terminal fixed to the housing, extending from the outside of the housing to the storage portion and arranged in parallel with the fixed contact side terminal in the housing. It can reduce the influence of the external magnetic field on the storage portion in the housing.

[0003] In the prior art, the electromagnetic relay installed in the smart meter is usually provided with a spring on one side of the L-shaped frame. The spring is connected to the rotating plate. When the coil is energized and the rotating plate is rotated, the spring is stretched. When the coil is de-energized, the rotating plate is reset by the reset force of the spring. However, since the reset force of springs stretched to the same length is the same, in actual use, it is necessary to use springs with different elastic coefficients or to install a damping adjustment device on the spring according to different usage conditions. This is not convenient to use, and when the contacts on the rotating plate are reset during the reset process of the rotating plate under the action of the reset force of the spring, they will collide with the fixed contacts, which may cause damage to the fixed contacts. In addition, the spring is prone to elastic attenuation and breakage due to fatigue during long-term use, resulting in a limited service life of the relay. Summary of the Invention

[0004] The object of the present invention is to provide an electromagnetic relay and an intelligent meter to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an electromagnetic relay according to one aspect of the present invention comprises an L-shaped frame, a rotating plate is rotatably mounted on the L-shaped frame, a protective shell is movably mounted on the L-shaped frame, a fixed contact is arranged on one side of the rotating plate, a pressure cylinder is movably mounted on the L-shaped frame, the top side of the pressure cylinder is provided with a movable mechanism for always resetting the rotating plate when the electromagnetic relay is powered off during a small-angle rotation of the rotating plate, an adjusting mechanism for adjusting the magnitude of the resetting force of the rotating plate is provided on the bottom side of the pressure cylinder, a buffer mechanism for reducing the contact force between the rotating plate and the fixed contact is provided inside the pressure cylinder, a telescopic mechanism for replacing and maintaining the pressure cylinder is provided on the bottom side of the pressure cylinder, and the telescopic mechanism is located on the outside of the adjusting mechanism. When the electromagnetic relay is working, the energized coil magnetizes the iron core, so that the magnetic core attracts the armature mounted on the rotating plate, thereby causing the rotating plate to rotate on the L-shaped frame to complete the switching of the fixed contact. When the power is off, the rotating plate is reset to the original fixed contact. Point contact. It should be noted that the above is common knowledge among technical personnel in this field and will not be elaborated here. When the coil is energized, the rotating plate drives the movable mechanism to slide on the pressure cylinder when it rotates to compress the air pressure in the pressure cylinder. When the coil is de-energized, the negative pressure in the pressure cylinder drives the movable mechanism to slide in the opposite direction and reset. By setting the adjusting mechanism, it is possible to adjust the pressure in the pressure cylinder according to the required size of the reset force of the rotating plate to adjust the size of the reset force, thereby further improving the practicality and ease of use of the structure. By setting the buffer mechanism, the contact impact force of the rotating plate is reduced when the contacts on the rotating plate just begin to separate from the original contacts and reach the vicinity of the target fixed contacts, thereby achieving protection for the fixed contacts and extending the service life of the electromagnetic relay. By setting the telescopic mechanism, the disassembly and assembly process can be completed by pressing the telescopic mechanism when replacement and maintenance are required, thereby further improving the ease of use of the structure.

[0006] Furthermore, the movable mechanism includes a sliding rod, which is slidably installed on the pressure cylinder, a piston is installed on the bottom side of the sliding rod, and the piston is slidably installed in the pressure cylinder, a spherical block is installed on the top side of the sliding rod, and a connecting seat is installed on the bottom side of the rotating plate. The spherical block is movably installed on the connecting seat. When the coil is energized, it drives the rotating plate to rotate, and when the rotating plate rotates, it drives the connecting seat to rotate. During the rotation of the connecting seat, the sliding rod is driven to slide on the pressure cylinder through the spherical block. When the sliding rod slides on the pressure cylinder, it drives the piston to slide in the pressure cylinder. When the coil is de-energized, the structure is driven to reset under the action of the negative pressure on the bottom side of the piston in the pressure cylinder.

[0007] Furthermore, a hemispherical groove is provided on the connecting seat, and the spherical block is movably installed in the hemispherical groove. Through the setting of the hemispherical groove, the spherical block is always located in the hemispherical groove when the connecting seat rotates with the rotating plate, and drives the spherical block and the sliding rod to slide on the pressing cylinder.

[0008] Furthermore, a sealing gasket is installed on the top side of the pressing cylinder, which is installed on the pressing cylinder. A placement groove is provided on the pressing cylinder, and the sealing gasket is installed in the placement groove. The sealing gasket is in contact with the sliding rod. Through the setting of the sealing gasket, the sealing inside the pressing cylinder is increased, and the scientific nature of the structure is further improved.

[0009] Furthermore, the adjusting mechanism includes a threaded rod, which is threadedly installed on the bottom side of the pressure cylinder. A threaded hole is provided on the bottom side of the pressure cylinder. The threaded rod is threadedly installed in the threaded hole. A cross slot is provided at one end of the threaded rod. An adjusting plug is installed at the other end of the threaded rod. The adjusting plug is slidably installed in the pressure cylinder. The threaded rod is driven to rotate by inserting a cross screwdriver into the cross slot on the threaded rod. When the threaded rod rotates, it is restricted by the threaded hole so that the adjusting plug on the threaded rod slides in the pressure cylinder to compress the initial gas volume in the pressure cylinder, thereby realizing the function of adjusting the reset force of the rotating plate.

[0010] Furthermore, the buffer mechanism includes two limit blocks, which are symmetrically installed in the pressure cylinder, and the spacing between the two limit blocks is adapted to the spacing between the fixed contacts. The adjusting plug is located on the side where the two limit blocks are away from each other, and the piston is located on the side where the two limit blocks are close to each other. Adapter holes are provided on the two limit blocks, and microporous grooves are provided on the two limit blocks, which are connected to the adapter holes. A stop block is installed on the side of the piston close to the adjusting plug, and a movable sleeve is installed on the side of the piston away from the adjusting plug. The movable sleeve is installed on the sliding rod, and the two adapting holes are respectively adapted to the diameters of the stop block and the movable sleeve. The distance between the limit blocks on both sides is equal to the distance between the fixed contacts, so that the piston slides from the limit block on one side to the limit block on the other side. When the stopper is in the position, the contact on the rotating plate is electrically connected to one of the fixed contacts. When the coil is energized, the rotating plate moves toward the fixed contact on the bottom side, and in the process drives the movable sleeve on the piston to slide in the adapter hole, and the gas flows through the microporous grooves on both sides. When the movable sleeve slides to disengage from the adapter hole, the gas flows through the microporous grooves and the adapter hole on both sides at the same time. When the rotating plate moves to about to contact the fixed contact on the bottom side, the stop block slides into the adapter hole, and the gas flows through the microporous grooves on both sides again, thereby achieving the purpose of slowing down the rotation speed of the rotating plate every time the rotating plate just disengages from or reaches the vicinity of the fixed contact by controlling the size of the gas flow, thereby achieving the buffering function, preventing the fixed contact from being damaged by excessive collision force, and improving the safety of the electromagnetic relay.

[0011] Furthermore, the telescopic mechanism includes a limiting sliding shaft, which is installed on the bottom side of the pressure cylinder, a sliding ring is slidably installed on the limiting sliding shaft, an adaptor ring groove is provided on the sliding ring, a ball is slidably installed on the sliding ring, the ball is located on the top side of the adaptor ring groove, a limiting ring groove is provided on the L-shaped frame, and the ball is movably installed in the limiting ring groove. The sliding ring is pressed to make the sliding ring slide on the limiting sliding shaft, thereby driving the adaptor ring groove to slide until it coincides with the ball, so that the ball is disengaged from the limiting ring groove. At this time, the pressure cylinder can be pulled out by sliding through the inner wall of the L-shaped frame. According to the above principle, the installation of the pressure cylinder can be achieved.

[0012] Furthermore, a sliding hole is provided on the pressure cylinder, and the ball is slidably installed in the sliding hole. Both ends of the ball extend outside the sliding hole. The setting of the sliding hole restricts the movement of the ball, and the ball can slide in the sliding hole, so that the ball is embedded in the limiting ring groove when fixed, and the ball is embedded in the adapter ring groove when unlocked.

[0013] Furthermore, a spring is movably sleeved on the limiting sliding shaft, one end of the spring is installed on the sliding ring, and the other end of the spring is installed on the pressure cylinder. Through the setting of the spring, when the sliding ring is loosened, the sliding ring is reset under the action of the reset elastic force of the spring. At this time, the adapter ring groove is located on the bottom side of the ball, completing the fixation of the structure.

[0014] In addition, another aspect of the present invention provides an intelligent meter, including an instrument case, a circuit board is arranged in the instrument case, and the above-mentioned electromagnetic relay, the electromagnetic relay is electrically connected to the circuit board, and an adjustment hole is opened on the instrument case, and the adjustment hole is located on the top side of the threaded rod. It should be noted that the intelligent meter equipped with the above-mentioned electromagnetic relay can be used in different environments. According to the different input voltages of the coil, the reset force required for the turning plate is different. A cross screwdriver can be inserted into the adjustment hole to reach the cross slot on the top side of the threaded rod, so that the reset force can be adjusted without disassembly, thereby improving the wide applicability of the intelligent meter.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention realizes resetting by the pressure of resetting gas through the arrangement of spherical blocks, pistons, pressure cylinders, limit blocks, microporous grooves, etc., thereby avoiding mechanical wear and extending the service life of the relay. The resetting force adjustment device can flexibly adjust the resetting force according to different usage scenarios, thereby improving the adaptability of the relay. The compact structural design and the adaptability of the components are reduced. The gas flow rate is changed for buffering, reducing the impact on the fixed contacts, further extending the service life of the electromagnetic relay, and making the intelligent instrument equipped with the electromagnetic relay have wide applicability.

[0016] The present invention, through the arrangement of the ball, the adapting ring groove, the limiting ring groove, the sliding ring, etc., can realize that when replacement and maintenance are needed, the pressing cylinder can be removed by pressing the sliding ring so that the ball is disengaged from the limiting ring groove and embedded in the adapting ring groove, thereby further improving the convenience of use of the structure.

[0017] The present invention increases the sealing performance in the pressure cylinder by arranging the sealing gasket, and further improves the scientific nature of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial cross-sectional structural schematic diagram of the instrument case of the present invention; Figure 3 This is a schematic structural diagram of the protective shell of the present invention; Figure 4 It is a structural schematic diagram of the pressing cylinder of the present invention; Figure 5 Schematic diagram of the structure of the sealing gasket of the present invention; Figure 6 It is a structural schematic diagram of the connecting seat of the present invention; Figure 7 This is a structural diagram of the airflow direction inside the pressing cylinder when the coil is powered on and off; Figure 8 It is a partial cross-sectional structural schematic diagram of the threaded rod of the present invention; Figure 9 It is a structural schematic diagram of the limiting ring groove of the present invention.

[0019] In the figure: 1. instrument case; 2. circuit board; 3. L-shaped frame; 4. rotating plate; 5. protective case; 6. fixed contact; 7. pressure cylinder; 8. movable mechanism; 801. sliding rod; 802. piston; 803. spherical block; 804. connecting seat; 805. hemispherical groove; 806. sealing gasket; 9. adjusting mechanism; 901. threaded rod; 902. adjusting plug; 903. threaded hole; 904. cross groove; 10. buffer mechanism; 1001. limit block; 1002. adapting hole; 1003. microporous groove; 1004. stop block; 1005. movable sleeve; 11. telescopic mechanism; 1101. limit sliding shaft; 1102. sliding ring; 1103. adapting ring groove; 1104. sliding hole; 1105. ball; 1106. limit ring groove; 1107. spring; 12. adjusting hole. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1 See also Figures 1-9 The electromagnetic relay of one aspect of the present invention shown in the figure includes an instrument case 1, a circuit board 2 is arranged in the instrument case 1, the circuit board 2 is electrically connected to the electromagnetic relay, an L-shaped frame 3 is installed on the electromagnetic relay, a rotating plate 4 is rotatably installed on the L-shaped frame 3, a protective shell 5 is movably installed on the L-shaped frame 3, a fixed contact 6 is provided on one side of the rotating plate 4, a pressure cylinder 7 is movably installed on the L-shaped frame 3, the top side of the pressure cylinder 7 is provided with a movable mechanism 8 for always resetting the rotating plate 4 when the electromagnetic relay is powered off during the small-angle rotation of the rotating plate 4, the bottom side of the pressure cylinder 7 is provided with an adjusting mechanism 9 for adjusting the reset force of the rotating plate 4, a buffer mechanism 10 for reducing the contact force between the rotating plate 4 and the fixed contact 6 is provided in the pressure cylinder 7, and a telescopic mechanism 11 for replacing and maintaining the pressure cylinder 7 is provided on the bottom side of the pressure cylinder 7. The telescopic mechanism 11 is located on the outside of the adjusting mechanism 9. When the electromagnetic relay is working, the energized coil magnetizes the iron core, so that the magnetic core attracts the armature installed on the rotating plate 4, so that the rotating plate 4 rotates on the L-shaped frame 3 to complete the fixed contact When the coil is energized, the rotary plate 4 rotates and drives the movable mechanism 8 to slide on the pressure cylinder 7 to compress the air pressure in the pressure cylinder 7. When the coil is de-energized, the negative pressure in the pressure cylinder 7 drives the movable mechanism 8 to slide and reset in the opposite direction. By setting the adjusting mechanism 9, it is possible to adjust the pressure in the pressure cylinder 7 according to the required size of the reset force of the rotary plate 4 to adjust the reset force, further improving the practicality and ease of use of the structure. By setting the buffer mechanism 10, the contact impact force of the rotary plate 4 is reduced when the contact on the rotary plate 4 just begins to separate from the original contact 6 and reaches the vicinity of the target fixed contact 6, thereby protecting the fixed contact 6 and extending the service life of the electromagnetic relay. By setting the telescopic mechanism 11, the disassembly and assembly process can be completed by pressing the telescopic mechanism 11 when replacement and maintenance are required, further improving the ease of use of the structure.

[0022] Reference Figure 1-Figure 7In the embodiment of the present invention, the movable mechanism 8 includes a sliding rod 801, which is slidably installed on the pressure cylinder 7. A piston 802 is installed on the bottom side of the sliding rod 801, and the piston 802 is slidably installed in the pressure cylinder 7. A spherical block 803 is installed on the top side of the sliding rod 801, and a connecting seat 804 is installed on the bottom side of the rotating plate 4. The spherical block 803 is movably installed on the connecting seat 804. When the coil is energized, it drives the rotating plate 4 to rotate. When the rotating plate 4 rotates, it drives the connecting seat 804 to rotate. During the rotation of the connecting seat 804, the sliding rod 801 is driven to slide on the pressure cylinder 7 through the spherical block 803. When the sliding rod 801 slides on the pressure cylinder 7, it drives the piston 802 to slide in the pressure cylinder 7. When the coil is de-energized, the structure is driven to reset under the action of the negative pressure on the bottom side of the piston 802 in the pressure cylinder 7.

[0023] Reference Figure 1-Figure 7 In the embodiment of the present invention, a hemispherical groove 805 is provided on the connecting seat 804, and the spherical block 803 is movably installed in the hemispherical groove 805. Through the setting of the hemispherical groove 805, when the connecting seat 804 rotates with the rotating plate 4, the spherical block 803 is always located in the hemispherical groove 805, and drives the spherical block 803 and the sliding rod 801 to slide on the pressing cylinder 7.

[0024] Reference Figure 1-Figure 7 In the embodiment of the present invention, a sealing gasket 806 is installed on the top side of the pressing cylinder 7, and the sealing gasket 806 is installed on the pressing cylinder 7. A placement groove is opened on the pressing cylinder 7, and the sealing gasket 806 is installed in the placement groove. The sealing gasket 806 is in contact with the sliding rod 801. Through the setting of the sealing gasket 806, the sealing inside the pressing cylinder 7 is increased, and the scientific nature of the structure is further improved.

[0025] Reference Figures 1-8 In the embodiment of the present invention, the adjusting mechanism 9 includes a threaded rod 901, which is threadedly installed on the bottom side of the pressure cylinder 7. A threaded hole 903 is provided on the bottom side of the pressure cylinder 7. The threaded rod 901 is threadedly installed in the threaded hole 903. A cross slot 904 is provided at one end of the threaded rod 901. An adjusting plug 902 is installed at the other end of the threaded rod 901. The adjusting plug 902 is slidably installed in the pressure cylinder 7. The threaded rod 901 is driven to rotate by inserting a cross screwdriver into the cross slot 904 on the threaded rod 901. When the threaded rod 901 rotates, it is restricted by the threaded hole 903, so that the adjusting plug 902 on the threaded rod 901 slides in the pressure cylinder 7 to compress the initial gas volume in the pressure cylinder 7, thereby realizing the function of adjusting the reset force of the rotating plate 4.

[0026] Reference Figure 1-Figure 7In the embodiment of the present invention, the buffer mechanism 10 includes two limit blocks 1001, which are symmetrically installed in the pressure cylinder 7. The distance between the two limit blocks 1001 is adapted to the distance between the fixed contacts 6. The adjusting plug 902 is located on the side where the two limit blocks 1001 are away from each other, and the piston 802 is located on the side where the two limit blocks 1001 are close to each other. The two limit blocks 1001 are both provided with an adapting hole 1002. There is a microporous groove 1003, which is connected to the adapter hole 1002. A stopper 1004 is installed on the side of the piston 802 close to the regulating plug 902, and a movable sleeve 1005 is installed on the side of the piston 802 away from the regulating plug 902. The movable sleeve 1005 is installed on the sliding rod 801. The two adapter holes 1002 are respectively adapted to the diameters of the stopper 1004 and the movable sleeve 1005. The distance between the limit blocks 1001 on both sides is equal to the distance between the fixed contacts 6, so that When the piston 802 slides from the stop block 1001 on one side to the stop block 1001 on the other side, the contact on the rotating plate 4 is electrically connected to one of the fixed contacts 6. When the coil is energized, the rotating plate 4 moves toward the fixed contact 6 on the bottom side, and in this process, the movable sleeve 1005 on the piston 802 slides in the adapter hole 1002, and the gas flows through the microporous grooves 1003 on both sides. When the movable sleeve 1005 slides out of the adapter hole 1002, the gas flows through the two microporous grooves 1003. The gas flows through the microporous grooves 1003 on the side and the adapter hole 1002 at the same time. When the rotating plate 4 moves to about to contact the fixed contact 6 on the bottom side, the block 1004 slides into the adapter hole 1002, and the gas flows through the microporous grooves 1003 on both sides again, thereby achieving the function of buffering by controlling the size of the air flow to slow down the rotation speed of the rotating plate 4 every time the rotating plate 4 just leaves or reaches the vicinity of the fixed contact 6, thereby preventing the fixed contact 6 from being damaged by excessive collision force, and improving the safety of the electromagnetic relay.

[0027] Reference Figures 1-9 1106 is provided on the L-shaped frame 3, and the ball 1105 is movably installed in the limiting ring groove 1106. The sliding ring 1102 is pressed and the sliding ring 1102 slides on the limiting sliding shaft 1101, thereby driving the adapting ring groove 1103 to slide until it coincides with the ball 1105, so that the ball 1105 is disengaged from the limiting ring groove 1106. At this time, the pressing cylinder 7 is pulled out by sliding through the inner wall of the L-shaped frame 3 to slide the pressing cylinder 7. According to the above principle, the installation of the pressing cylinder 7 can be achieved.

[0028] Reference Figures 1-9 In the embodiment of the present invention, a sliding hole 1104 is opened on the pressing cylinder 7, and the ball 1105 is slidably installed in the sliding hole 1104. Both ends of the ball 1105 extend to the outside of the sliding hole 1104. The setting of the sliding hole 1104 restricts the movement of the ball 1105, and the ball 1105 can slide in the sliding hole 1104, so that the ball 1105 is embedded in the limiting ring groove 1106 when fixed, and the ball 1105 is embedded in the adapter ring groove 1103 when unlocked.

[0029] Reference Figures 1-9 In the embodiment of the present invention, a spring 1107 is movably sleeved on the limiting sliding shaft 1101, one end of the spring 1107 is installed on the sliding ring 1102, and the other end of the spring 1107 is installed on the pressure cylinder 7. Through the setting of the spring 1107, when the sliding ring 1102 is loosened, the sliding ring 1102 is reset under the action of the reset elastic force of the spring 1107. At this time, the adapter ring groove 1103 is located on the bottom side of the ball 1105, completing the fixation of the structure.

[0030] Example 2 Reference Figures 1-9 The smart meter of another aspect of the present invention shown in the figure includes an instrument case 1, a circuit board 2 is arranged in the instrument case 1, and also includes the above-mentioned electromagnetic relay, which is electrically connected to the circuit board 2. An adjustment hole 12 is opened on the instrument case 1, and the adjustment hole 12 is located on the top side of the threaded rod 901.

[0031] It should be noted that when a smart meter equipped with the above-mentioned electromagnetic relay is used in different environments, the reset force required by the turn plate 4 is different according to the different coil input voltages. A cross screwdriver can be inserted into the adjustment hole 12 to reach the cross slot 904 on the top side of the threaded rod 901, so that the reset force can be adjusted without disassembly, thereby improving the wide applicability of the smart meter.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic relay comprises an L-shaped frame (3), a rotating plate (4) is rotatably mounted on the L-shaped frame (3), a protective shell (5) is movably mounted on the L-shaped frame (3), and a fixed contact (6) is provided on one side of the rotating plate (4), characterized in that: A pressure cylinder (7) is movably mounted on the L-shaped frame (3); a movable mechanism (8) is provided on the top side of the pressure cylinder (7) for resetting the rotating plate (4) when the electromagnetic relay is powered off during the small-angle rotation of the rotating plate (4); an adjusting mechanism (9) is provided on the bottom side of the pressure cylinder (7) for adjusting the magnitude of the resetting force of the rotating plate (4); a buffer mechanism (10) is provided in the pressure cylinder (7) for reducing the contact force between the rotating plate (4) and the fixed contact (6); a telescopic mechanism (11) is provided on the bottom side of the pressure cylinder (7) for replacing and maintaining the pressure cylinder (7); and the telescopic mechanism (11) is located outside the adjusting mechanism (9).

2. The electromagnetic relay according to claim 1, wherein: The movable mechanism (8) includes a sliding rod (801), the sliding rod (801) is slidably mounted on the pressing cylinder (7), a piston (802) is mounted on the bottom side of the sliding rod (801), the piston (802) is slidably mounted in the pressing cylinder (7), a spherical block (803) is mounted on the top side of the sliding rod (801), a connecting seat (804) is mounted on the bottom side of the rotating plate (4), and the spherical block (803) is movably mounted on the connecting seat (804).

3. The electromagnetic relay according to claim 2, wherein: A hemispherical groove (805) is provided on the connecting seat (804), and the spherical block (803) is movably installed in the hemispherical groove (805).

4. The electromagnetic relay according to claim 3, wherein: A sealing gasket (806) is installed on the top side of the pressing cylinder (7). The sealing gasket (806) is installed on the pressing cylinder (7). A placement groove is opened on the pressing cylinder (7). The sealing gasket (806) is installed in the placement groove. The sealing gasket (806) contacts the sliding rod (801).

5. The electromagnetic relay according to claim 4, wherein: The adjusting mechanism (9) comprises a threaded rod (901), the threaded rod (901) being threadedly mounted on the bottom side of the pressing cylinder (7), the bottom side of the pressing cylinder (7) being provided with a threaded hole (903), the threaded rod (901) being threadedly mounted in the threaded hole (903), one end of the threaded rod (901) being provided with a cross slot (904), the other end of the threaded rod (901) being provided with an adjusting plug (902), the adjusting plug (902) being slidably mounted in the pressing cylinder (7).

6. The electromagnetic relay according to claim 5, characterized in that: The buffer mechanism (10) comprises two limit baffles (1001), the two limit baffles (1001) are symmetrically mounted in the pressure cylinder (7), the spacing between the two limit baffles (1001) is adapted to the spacing between the fixed contacts (6), the adjustment plug (902) is located on the side where the two limit baffles (1001) are away from each other, the piston (802) is located on the side where the two limit baffles (1001) are close to each other, and the two limit baffles (1001) are both provided with an adapting hole (1002). (1001) is provided with a microporous groove (1003), the microporous groove (1003) is connected with the adapter hole (1002), a stop block (1004) is installed on the side of the piston (802) close to the regulating plug (902), and a movable sleeve (1005) is installed on the side of the piston (802) away from the regulating plug (902), and the movable sleeve (1005) is installed on the sliding rod (801), and the two adapter holes (1002) are respectively adapted to the diameters of the stop block (1004) and the movable sleeve (1005).

7. The electromagnetic relay according to claim 6, characterized in that: The telescopic mechanism (11) includes a limiting sliding shaft (1101), which is installed on the bottom side of the pressing cylinder (7), a sliding ring (1102) is slidably installed on the limiting sliding shaft (1101), an adapting ring groove (1103) is provided on the sliding ring (1102), a ball (1105) is slidably installed on the sliding ring (1102), and the ball (1105) is located on the top side of the adapting ring groove (1103), and a limiting ring groove (1106) is provided on the L-shaped frame (3), and the ball (1105) is movably installed in the limiting ring groove (1106).

8. The electromagnetic relay according to claim 7, wherein: The pressing cylinder (7) is provided with a sliding hole (1104), and the ball (1105) is slidably installed in the sliding hole (1104), with both ends of the ball (1105) extending outside the sliding hole (1104).

9. The electromagnetic relay according to claim 8, characterized in that: A spring (1107) is movably sleeved on the limiting sliding shaft (1101), one end of the spring (1107) is mounted on the sliding ring (1102), and the other end of the spring (1107) is mounted on the pressing cylinder (7).

10. An intelligent meter, comprising a meter housing (1), wherein a circuit board (2) is arranged in the meter housing (1), characterized in that: Also includes: The electromagnetic relay according to any one of claims 1 to 9, wherein the electromagnetic relay is electrically connected to a circuit board (2), an adjustment hole (12) is provided on the instrument housing (1), and the adjustment hole (12) is located on the top side of the threaded rod (901).

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