Sealing device of electric energy meter

Abstract

The utility model relates to a sealing device, in particular to a sealing device of an electric energy meter, which comprises a base, a first mounting groove with an opening in the top end is arranged in the base, lifting assemblies are symmetrically arranged on the left side and the right side of the base, the lifting assemblies on the two sides are respectively connected with a sliding table in a driving mode, and the sliding tables are connected with fixing plates in a driving mode. A positioning assembly is mounted on the fixing plate, and a through guide channel is formed in the center of the axis of the positioning assembly; according to the utility model, the positioning assembly is arranged on the fixing plate, and the lifting cylinder and the sliding table are arranged to drive the fixing plate, so that the positioning assembly can be adjusted to the position of the lead sealing hole of the electric energy meter, and the guide channel of the positioning assembly is coaxially aligned with the lead sealing hole, thereby restraining the motion trail of the lead sealing in the press fitting process; therefore, the lead seal is pressed into the lead seal hole in a state of being coaxial with the lead seal hole, and the lead seal is prevented from being blocked due to positioning deviation in the press-fitting process, so that the electric energy meter shell is prevented from being extruded and damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a seal device, especially an electric energy meter's seal device. BACKGROUND

[0002] As the core terminal equipment for measuring electric energy consumption in the power system, with the promotion of smart grid construction, the electric energy meter not only bears the basic metering function, but also must have the intelligent needs such as anti-stealing electricity, state monitoring, and the seal operation is the key link before the electric energy meter is put into use, the physical lead seal is installed at the key opening and connecting parts of the meter body, such as the connecting place of the terminal box, the shell and the like, so that the electric energy meter has the function of leaving marks after breaking, thereby the unauthorized disassembly, modification or data tampering can be effectively prevented, and the accuracy and fairness of electric power metering are guaranteed.

[0003] The traditional seal operation relies on manual placing of the lead seal in the specified position of the electric energy meter, and the lead seal is pressed into the lead seal hole reserved on the electric energy meter by using the pressing equipment, in the pressing process, the lead seal placing precision is low, and lacks constraint, leading to the deviation of the lead seal axis and the lead seal hole axis after pressing, causing the lead seal to be stuck in the lead seal hole, having uneven concentrated compressive stress to the shell, making the material at the stress position deform and cause irreversible damage, long-term use accelerates the shell aging and easily causes the lead seal to be accidentally removed; in the pressing process, displacement is prone to occur due to uneven stress, so that the pressure is transmitted to the electric energy meter, and the electric energy meter shell is damaged. SUMMARY

[0004] The utility model aims at providing a kind of electric energy meter's seal device to solve the problems raised in the above background.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A kind of electric energy meter's seal device, including base, the first installation slot with top opening is equipped in the base, the lifting assembly is symmetrically equipped in the left and right sides of the base, the lifting assembly of two sides is respectively driven connection has slide table, the fixed plate is driven connection on the slide table, the positioning assembly is installed on the fixed plate, the axis center of the positioning assembly is equipped with the through guide channel, the positioning assembly is located directly above the installation slot, the pressing cylinder is installed at the top of the positioning assembly, the output end of the pressing cylinder is driven connection has pressing block, the pressing block is coaxial with guide channel.

[0007] Preferably, the first ejector mechanism is symmetrically installed on the upper and lower ends of the base, the second ejector mechanism is symmetrically installed on the left and right ends, the electric energy meter is equipped in the first installation slot, and the first ejector mechanism, the second ejector mechanism and the corresponding side wall of the electric energy meter are in contact.

[0008] Preferably, the electric energy meter has a lead seal hole, and the guide channel has the same diameter as the lead seal hole.

[0009] Preferably, the first pushing mechanism comprises a pushing cylinder fixedly installed on the outer wall of the upper and lower ends of the base, and the output end of the pushing cylinder is drivingly connected with a first top plate arranged in the mounting groove through the base.

[0010] The second pushing mechanism comprises a sleeve symmetrically installed on the inner wall of the left and right sides of the mounting groove, and a top rod is slidingly connected in the sleeve, and a first elastic member is further arranged in the sleeve.

[0011] Preferably, the lifting assembly on both sides comprises a lifting cylinder symmetrically arranged on the upper and lower ends of the base, the sliding table comprises a U-shaped frame, the output end of the lifting cylinder on both sides is fixedly connected with the U-shaped frame, the other end of the U-shaped frame is provided with a lead screw, one end of the lead screw is connected with a driving motor through the top wall of the U-shaped frame, a sliding block is drivingly connected on the lead screw, and the other end of the sliding block is fixedly connected with the fixed plate.

[0012] Preferably, the positioning assembly comprises a limiting ring, a guide cylinder is coaxially connected to the bottom of the limiting ring, a rubber ring is arranged at the bottom of the guide cylinder, the guide channel is coaxially arranged through the limiting ring and the guide cylinder, and the top end of the guide channel is provided with an inverted bevel.

[0013] Preferably, an annular groove is arranged on the outer periphery between the limiting ring and the guide cylinder, a second mounting groove is arranged on the fixed plate and longitudinally penetrates the fixed plate, and the annular groove is slidingly connected with the second mounting groove.

[0014] Preferably, a locking hole is arranged in the annular groove, an adjusting groove is arranged in the side end of the fixed plate and communicates with the second mounting groove, a locking bolt is arranged in the adjusting groove, and the shank of the locking bolt is threadedly connected with the locking hole through the adjusting groove at one end.

[0015] Preferably, a plurality of inwardly recessed grooves are arranged around the circumferential direction of the guide cylinder, the opening end of the inwardly recessed groove is communicated with the guide channel, and an elastic supporting assembly is arranged in the inwardly recessed groove.

[0016] Preferably, the elastic supporting assembly comprises a clamping block, the clamping block is slidingly connected with the inwardly recessed groove, a second elastic member is arranged between the inwardly recessed groove and the clamping block, and an inclined surface is arranged at the top end of the clamping block.

[0017] Compared with the prior art, the utility model provides a kind of sealing device of electric energy meter, with the following beneficial effects:

[0018] 1. The utility model discloses a positioning assembly is arranged on the fixed plate, and through setting up the lifting cylinder and the slide table drive fixed plate, makes the positioning assembly with the lead seal hole position of electric energy meter can be adjusted to, makes the guide channel of positioning assembly with lead seal hole coaxial alignment, thereby in the press -fitting process, the movement track of lead seal is restricted, makes lead seal keep the posture of being pressed into with lead seal hole coaxial, avoids the lead seal jamming caused by the positioning deviation in the press -fitting process, thereby extruding damage electric energy meter shell.

[0019] 2. The utility model discloses setting up the elastic support assembly in the guide cylinder inside is pre -positioned to lead seal before press -fitting, prevents lead seal from freely falling because of gravity, and cooperates with the pressing block, and is used for automatic correction lead seal's posture before press -fitting, avoids the axial deviation between lead seal and lead seal hole because of lead seal initial position deviation, thereby improves the coaxiality of press -fitting. ACCURACY

[0020] Figure 1 It is three -dimensional structure schematic diagram of the utility model;

[0021] Figure 2 It is overhead structure schematic diagram of the utility model;

[0022] Figure 3 It is three -dimensional structure schematic diagram of the utility model's positioning assembly and fixed plate connection state partial section;

[0023] Figure 4 It is three -dimensional structure schematic diagram of the utility model's positioning assembly;

[0024] Figure 5 It is three -dimensional structure schematic diagram of the utility model's positioning assembly partial section;

[0025] Figure 6 It is three -dimensional structure partial section schematic diagram of the utility model's guide cylinder;

[0026] Figure 7 It is three -dimensional structure partial section schematic diagram of the utility model's second push mechanism;

[0027] Figure 8 It is three -dimensional structure partial section schematic diagram of the utility model's Figure 1 It is three -dimensional structure partial section schematic diagram of the utility model's

[0028] In the figure: 1, base; 11, first mounting groove; 2, first pushing mechanism; 21, pushing cylinder; 22, first top plate; 3, lifting cylinder; 4, sliding table; 41, U-shaped frame; 42, driving motor; 43, screw rod; 5, fixed plate; 51, sliding block; 52, second mounting groove; 53, adjusting groove; 54, locking bolt; 6, second pushing mechanism; 61, sleeve; 62, top rod; 63, first elastic member; 7, electric energy meter; 71, lead seal hole; 8, pressing cylinder; 81, pressing block; 9, positioning assembly; 91, limiting ring; 92, annular groove; 921, locking hole; 93, guide cylinder; 931, retracted groove; 94, rubber ring; 95, guide channel; 951, inverted bevel; 96, elastic support assembly; 961, clamping block; 962, chamfered surface; 963, second elastic member. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0030] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0031] Embodiment, refer to Figure 1 - Figure 8The utility model provides an electric energy meter's sealing device, including base 1, the inside of base 1 is equipped with the first installation groove 11 of top end opening, the both sides of base 1 are symmetrically equipped with lifting assembly, both sides lifting assembly is driven connection respectively with sliding table 4, sliding table 4 is driven connection with fixed plate 5 on, fixed plate 5 is installed with positioning assembly 9, the axis center of positioning assembly 9 is equipped with the through guide channel 95, positioning assembly 9 is located the just above installation groove, positioning assembly 9 top end is installed with pressure mounting air cylinder 8, the model is FESTO DSNU25-50-PPV-A guide cylinder, the output end of pressure mounting air cylinder 8 is driven connection with pressure block 81, and pressure block 81 is coaxial with guide channel 95, when using, drive sliding table 4 along vertical direction movement through lifting assembly drive, make the bottom surface of positioning assembly 9 with the top surface of electric energy meter 7 abut, make the guide channel 95 of positioning assembly 9 with the lead seal hole 71 of electric energy meter 7 coaxial alignment, lead seal is arranged in guide channel 95, and the pressure mounting air cylinder 8 of positioning assembly 9 top end can drive pressure block 81 along guide channel 95 axis direction movement, make pressure block 81 push lead seal along guide channel 95 movement, from one end of positioning assembly 9 pressure mounting to the lead seal hole 71 of electric energy meter 7.

[0032] Further, the first push mechanism 2 is symmetrically installed on the upper and lower ends of the base 1, the second push mechanism 6 is symmetrically installed on the left and right ends, the electric energy meter 7 is arranged in the first installation groove 11, the first push mechanism 2 and the second push mechanism 6 abut against the corresponding side wall of the electric energy meter 7, when pressure mounting, the electric energy meter 7 is installed in the first installation groove 11, the first push mechanism 2 and the second push mechanism 6 abut against the corresponding side wall of the electric energy meter 7 respectively, so as to limit the displacement of the electric energy meter 7, and the electric energy meter 7 is centrally fixed, avoiding the displacement of the electric energy meter 7 due to stress during sealing process, affecting the precision of lead seal pressure mounting.

[0033] Further, the electric energy meter 7 has a lead seal hole 71, the hole diameter of the guide channel 95 is the same as that of the lead seal hole 71, so that the pressure block 81 can smoothly pass through the guide channel 95 and accurately enter the lead seal hole 71, avoiding the sealing jam or position deviation due to the mismatch of hole diameters, so that the lead seal and the lead seal hole 71 are not corresponding during pressure mounting, the lead seal deviates from the pressure mounting hole during pressure mounting, and thus there is extrusion between the lead seal and the shell of the electric energy meter 7.

[0034] Further, the first push mechanism 2 includes push cylinders 21 fixedly installed on the outer walls of the upper and lower ends of the base 1, the model is TN20-50, the output end of the push cylinder 21 is driven connected with a first top plate 22 arranged in the installation groove through the base 1, the push cylinder 21 is used to push the first top plate 22 to abut against the corresponding side wall of the electric energy meter 7, and the push cylinders 21 at the upper and lower ends act synchronously, so that the electric energy meter 7 installed in the first installation groove 11 is centrally arranged in the first installation groove 11 in the upward and downward directions;

[0035] The second pushing mechanism 6 comprises sleeves 61 symmetrically mounted on the inner walls of the left and right sides of the installation groove, a top rod 62 is slidably connected in the sleeves 61, and a first elastic member 63 is arranged in the sleeves 61. One end of the first elastic member 63 abuts against the inner wall of the installation groove, and the other end abuts against the top rod 62. The sleeves 61 are used for providing sliding guide for the top rod 62, and the first elastic member 63 in the sleeves 61 generates a pushing force to push the top rod 62 to abut against the side of the electric energy meter 7, so that the electric energy meter 7 is centrally fixed left and right.

[0036] Further, the two-side lifting assembly comprises lifting cylinders 3 symmetrically arranged at the upper and lower ends of the base 1, and the model of the lifting cylinders 3 is MSMF042G1U. The sliding table 4 comprises a U-shaped frame 41, the output ends of the two lifting cylinders 3 are fixedly connected with the U-shaped frame 41, the other end of the U-shaped frame 41 is provided with a lead screw 43, one end of the lead screw 43 penetrates through the top wall of the U-shaped frame 41 and is connected with a driving motor 42, and the model of the driving motor 42 is 57HS13 two-phase stepping motor. A sliding block 51 is drivingly connected with the lead screw 43, and the other end of the sliding block 51 is fixedly connected with the fixed plate 5. The lifting cylinders 3 are used for driving the overall sliding table 4 and the fixed plate 5 to perform lifting movement, so that the positioning assembly 9 arranged above the fixed plate 5 can move close to the top wall of the electric energy meter 7 in the vertical direction, the guide channel 95 is coaxially aligned with the lead seal hole 71 of the electric energy meter 7, so that in the process of pressing, the movement track of the lead seal is constrained, the lead seal is pushed by the pressing block 81 to move into the lead seal hole 71 along the guide channel 95, and the pressing precision is improved.

[0037] Further, the positioning assembly 9 comprises a limiting ring 91, the limiting ring 91 is coaxially connected with a guide cylinder 93 at the bottom, the bottom of the guide cylinder 93 is provided with a rubber ring 94, the rubber ring 94 is used for flexibly abutting against the top surface of the electric energy meter 7, so as to avoid scratching the shell of the electric energy meter 7 and increase the friction between the contact surfaces. The guide channel 95 coaxially penetrates through the limiting ring 91 and the guide cylinder 93, and the top end of the guide channel 95 is provided with an inverted bevel 951, so as to facilitate the lead seal to be put into the guide channel 95 from the top end of the guide channel 95, and then the lead seal is pushed to move in the pressing process.

[0038] Further, an annular groove 92 is arranged on the outer periphery between the limiting ring 91 and the guide cylinder 93, a second installation groove 52 longitudinally penetrating through the fixed plate 5 is arranged on the fixed plate 5, the annular groove 92 is slidably connected with the second installation groove 52, the overall positioning assembly 9 is clamped and installed through the annular groove 92 and the second installation groove 52, and the positioning assembly 9 can be slidably adjusted in position along the second installation groove 52, so that the guide channel 95 is coaxially aligned with the lead seal hole 71 of the electric energy meter 7.

[0039] Further, the annular groove 92 is provided with a locking hole 921, the side end of the fixed plate 5 is provided with an adjusting groove 53 communicating with the second mounting groove 52, the adjusting groove 53 is provided with a locking bolt 54, the shank of the locking bolt 54 is threadedly connected with the locking hole 921 through the adjusting groove 53, when the positioning assembly 9 is adjusted to the target position along the second mounting groove 52, the locking bolt 54 is screwed into the locking hole 921 of the annular groove 92 through the adjusting groove 53 of the side end of the fixed plate 5, the total length between the locking hole 921 and the adjusting groove 53 is greater than the length of the shank of the locking bolt 54, so that the locking bolt 54 locks the positioning assembly 9 on the fixed plate 5, limits the displacement of the positioning assembly 9, prevents the displacement of the positioning assembly 9 during the sealing process, and aligns the guide channel 95 with the lead seal hole 71.

[0040] Further, the guide cylinder 93 is internally provided with a plurality of inward grooves 931 around the circumference thereof, the opening end of the inward groove 931 communicates with the guide channel 95, the inward groove 931 is provided with an elastic supporting assembly 96, before pressing, the lead seal is placed in the guide channel 95, and the elastic supporting assembly 96 prevents the movement of the lead seal; when pressing, the pressing block 81 pushes the lead seal to move, which will extrude the elastic supporting assembly 96 to make it retract into the inward groove 931, so that the lead seal can smoothly pass through the guide channel 95 and enter the lead seal hole 71 of the electric energy meter 7.

[0041] Further, the elastic supporting assembly 96 includes a clamping block 961, the clamping block 961 is in sliding connection with the inward groove 931, and a second elastic member 963 is arranged between the inward groove 931 and the clamping block 961, the top end of the clamping block 961 is provided with a beveled surface 962, the beveled surface 962 can convert the force applied by the lead seal and the pressing block 81 to a component force that pushes the clamping block 961 to retract laterally in the inward groove 931, so that the clamping block 961 compresses the second elastic member 963 and enters the inward groove 931, so that the pressing block 81 and the lead seal can pass smoothly, and the upper and lower ends of the pressing block 81 are also provided with beveled surfaces 962, when the lead seal and the guide channel 95 have a coaxiality deviation, the lead seal exerts different pressure values on the multiple clamping blocks 961, and the offset side is first acted on by the pushing force of the pressing block 81 and moves, when the lead seal is in contact with the bottom surface of the pressing block 81, the lead seal synchronously applies the pushing force of the pressing block 81 to the multiple clamping blocks 961, so that the clamping blocks 961 retract under stress, so that the lead seal can pass through the guide channel 95 and be pressed into the lead seal hole 71 in a coaxial posture with the lead seal hole 71.

[0042] Working principle: the meter to be sealed 7 is put into the first installation slot 11 of the base 1, the push air cylinder 21 at the upper and lower ends of the base 1 is started, the output end of the push air cylinder 21 pushes the first top plate 22 to tightly abut against the upper and lower side walls of the meter 7, so that the meter 7 is centered in the up-down direction; at the same time, the first elastic element 63 in the sleeve 61 of the left and right inner walls of the installation slot pushes the top rod 62 to extend out, the top rod 62 abuts against the left and right side walls of the meter 7, so as to ensure that the meter 7 is centered and fixed left and right, and the displacement of the meter 7 in the sealing process is limited, the lifting air cylinder 3 at the upper and lower ends of the base 1 is started, the sliding table 4 is driven to move downward, the bottom surface of the positioning assembly 9 gradually approaches the top surface of the meter 7, the motor 42 drives the screw rod 43 to rotate, the sliding block 51 moves on the screw rod 43, and then drives the fixed plate 5 and the positioning assembly 9 to move up and down, in addition, the positioning assembly 9 is slidably connected with the second installation slot 52 of the fixed plate 5 through the annular groove 92, longitudinal position adjustment is performed, until the guide channel 95 of the positioning assembly 9 is coaxially aligned with the lead seal hole 71 of the meter 7, after adjustment is completed, the locking bolt 54 is screwed into the locking hole 921 in the annular groove 92 through the adjustment slot 53, the position of the positioning assembly 9 is fixed, the lead seal is put into the guide channel 95 from the top opening of the guide channel 95, the elastic supporting assembly 96 in the inner retracted groove 931 of the guide cylinder 93 prevents the lead seal from falling, waiting for press fitting, the press fitting air cylinder 8 at the top end of the positioning assembly 9 is started, the output end drives the pressing block 81 to move downward along the axis direction of the guide channel 95, the inclined surfaces 962 at the upper and lower ends of the pressing block 81 interact with the inclined surfaces 962 at the top end of the clamping block 961 of the elastic supporting assembly 96, the pressure is converted into a component force for transversely retracting the clamping block 961, the second elastic element 963 is compressed, the clamping block 961 is retracted into the inner retracted groove 931, the lead seal is allowed to pass, the pressing block 81 continues to push the lead seal to move along the guide channel 95, until the lead seal is accurately press fitted into the lead seal hole 71 of the meter 7, the sealing operation is completed.

[0043] The above merely describes a preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A sealing device for an electric energy meter, comprising a base (1) provided with a first mounting slot (11) with an open top end inside the base (1), characterized in that: The base (1) is symmetrically provided with lifting assemblies on the left and right sides, and the lifting assemblies on the left and right sides are respectively driven to be connected with sliding tables (4), the sliding tables (4) are driven to be connected with fixed plates (5), the fixed plates (5) are installed with positioning assemblies (9), the positioning assemblies (9) are provided with through guide channels (95) at the center of the axis, the positioning assemblies (9) are located above the installation grooves, the positioning assemblies (9) are installed with pressing cylinders (8) at the top, output ends of the pressing cylinders (8) are driven to be connected with pressing blocks (81), the pressing blocks (81) are coaxial with the guide channels (95).

2. The seal device of an electric energy meter according to claim 1, characterized in that, The base (1) is symmetrically provided with first pushing mechanisms (2) at the upper and lower ends, and is symmetrically provided with second pushing mechanisms (6) at the left and right ends, the first installation grooves (11) are internally provided with electric energy meters (7), the first pushing mechanisms (2) and the second pushing mechanisms (6) abut against the side walls corresponding to the electric energy meters (7).

3. The seal device of an electric energy meter according to claim 2, wherein The electric energy meters (7) are provided with lead seal holes (71), and the guide channels (95) have the same aperture as the lead seal holes (71).

4. The seal device of claim 3, wherein the seal device is a seal device for an electric energy meter. The first pushing mechanisms (2) comprise pushing cylinders (21) fixedly installed on the outer walls of the upper and lower ends of the base (1), output ends of the pushing cylinders (21) pass through the base (1) to drive first top plates (22) arranged in the installation grooves; The second pushing mechanisms (6) comprise sleeves (61) symmetrically installed on the inner walls of the left and right sides in the installation grooves, the sleeves (61) are slidably connected with top rods (62), and the sleeves (61) are further provided with first elastic members (63) inside, one end of each first elastic member (63) abuts against the inner wall of the installation groove, and the other end abuts against the top rod (62).

5. The seal device for an electric energy meter according to claim 1, wherein The lifting assemblies on the left and right sides comprise lifting cylinders (3) symmetrically arranged at the upper and lower ends of the base (1), the sliding tables (4) comprise U-shaped frames (41), output ends of the lifting cylinders (3) on the left and right sides are fixedly connected with the U-shaped frames (41), the U-shaped frames (41) are provided with lead screws (43) at the other ends, one end of each lead screw (43) passes through the top wall of the U-shaped frame (41) to be connected with a driving motor (42), the lead screws (43) are driven to be connected with sliding blocks (51), and the other ends of the sliding blocks (51) are fixedly connected with the fixed plates (5).

6. The seal device of an electric energy meter according to claim 1, wherein The positioning assemblies (9) comprise limiting rings (91), the limiting rings (91) are coaxially connected with guide cylinders (93) at the bottom, the guide cylinders (93) are provided with rubber rings (94) at the bottom, the guide channels (95) are coaxially through the limiting rings (91) and the guide cylinders (93), and the guide channels (95) are provided with inverted bevels (951) at the top openings.

7. The seal device of an electric energy meter according to claim 6, wherein Annular grooves (92) are arranged on the outer periphery between the limiting rings (91) and the guide cylinders (93), the fixed plates (5) are provided with second installation grooves (52) longitudinally penetrating the fixed plates (5), and the annular grooves (92) are slidably connected with the second installation grooves (52).

8. The seal device of an electric energy meter according to claim 7, wherein The annular groove (92) is provided with a locking hole (921), the side end of the fixing plate (5) is provided with an adjusting groove (53) communicating with the second mounting groove (52), the adjusting groove (53) is provided with a locking bolt (54), and the bolt end of the locking bolt (54) is threadedly connected with the locking hole (921) through the adjusting groove (53).

9. The seal device for an electric energy meter according to claim 7, wherein A plurality of inward grooves (931) are arranged around the circumference of the guide cylinder (93), the opening end of the inward groove (931) is communicated with the guide channel (95), and the inward groove (931) is provided with an elastic supporting assembly (96).

10. The seal device for an electric energy meter according to claim 9, wherein The elastic supporting assembly (96) comprises a clamping block (961), the clamping block (961) is in sliding connection with the inward groove (931), a second elastic member (963) is arranged between the inward groove (931) and the clamping block (961), and the top end of the clamping block (961) is provided with an inclined surface (962).

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