Waterproof structure of electric energy meter

Abstract

The application belongs to the technical field of electric energy meter, and discloses a waterproof structure of electric energy meter, which comprises an electric energy meter and a terminal block installed on the bottom side of the electric energy meter, a waterproof block is arranged on the side of the terminal block away from the electric energy meter, the waterproof block is connected to the terminal block, a plurality of through holes are formed in the waterproof block, a plurality of terminal holes are formed in the bottom side of the terminal block, and the plurality of through holes are matched with the plurality of terminal holes; an installation groove is formed in the inner wall of the through hole, two waterproof rubber blocks are movably installed in the installation groove, and the two waterproof rubber blocks are used for clamping the wire. Through the waterproof block, after the wiring is completed, the closure of the two protective rubber blocks and the arrangement of the sealing rubber pad can seal the position where the terminal block is connected to the wire, effectively guarantee the waterproof performance of the electric energy meter, avoid the problem of water seepage or water vapor seepage caused by the exposed wire connection, and ensure the use of the electric energy meter.

Description

Technical Field

[0001] This invention relates to a waterproof structure for an electricity meter, belonging to the field of electricity meter technology. Background Technology

[0002] An electricity meter is an instrument used to measure electrical energy. Also known as a kilowatt-hour meter, it measures various electrical quantities. When using an electricity meter, it's important to note that under low voltage (not exceeding 500 volts) and low current (tens of amps) conditions, the electricity meter can be directly connected to the circuit for measurement. Under high voltage or high current conditions, the electricity meter cannot be directly connected to the line and must be used in conjunction with a voltage transformer or current transformer.

[0003] With the advancement of technology, the casing of electricity meters has become very precise, and traditional mechanical electricity meters have been transformed into electronic ones, further improving their sealing performance. However, the only exposed part of the electricity meter is the wiring section. Due to the long-term exposure of the wires, water can easily enter during use, and when used in a relatively humid environment for a long time, moisture can easily penetrate through the wiring section, eventually causing short circuits or other related problems. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a waterproof structure for an electricity meter that can seal the wiring positions of the electricity meter, thereby ensuring sufficient sealing and guaranteeing the waterproof performance of the electricity meter.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a waterproof structure for an electricity meter, comprising an electricity meter and a terminal block installed on its bottom side, wherein a waterproof seat is provided on the side of the terminal block away from the electricity meter, the waterproof seat is connected to the terminal block, and a plurality of communication holes are provided on the waterproof seat, and a plurality of wiring holes are provided on the bottom side of the terminal block, wherein the communication holes are adapted to the wiring holes.

[0006] An installation groove is provided on the inner wall of the connecting hole. Two waterproof rubber blocks are movably installed in the installation groove to clamp the wire. An arc-shaped groove is provided on the side of the two waterproof rubber blocks that are close to each other. The radius of the arc-shaped groove is smaller than the radius of the wire. A sealing rubber gasket is installed on the top side of the waterproof seat. The sealing rubber gasket is adapted to the terminal block.

[0007] It also includes a mounting mechanism for mounting the waterproof base, the mounting mechanism being arranged on both sides of the waterproof base.

[0008] Preferably, the installation mechanism includes two mounting seats, which are respectively installed on both sides of the waterproof seat. Each of the two mounting seats is equipped with a rotating shaft, and each of the two rotating shafts is rotatably equipped with a clamping rod. Both sides of the terminal block are provided with slots, and clamping blocks are installed on the side of the two clamping rods that are close to each other. The two clamping blocks are respectively adapted to the two slots.

[0009] Preferably, the clamping rod has a placement groove, and a torsion spring is installed in the placement groove. One end of the torsion spring is installed on the inner wall of the placement groove, and the other end of the torsion spring is installed on the rotating shaft.

[0010] Preferably, the waterproof base has two mounting holes, and a connecting bolt is slidably installed in each of the two mounting holes. Both connecting bolts are threaded onto the bottom side of the terminal block.

[0011] Preferably, the device further includes a drive mechanism, which comprises multiple rotating frames. Each of the mounting slots has a rotating hole on one inner wall, and the rotating frames are rotatably mounted in the rotating holes.

[0012] Preferably, two drive shafts are rotatably mounted on one side of the rotating frame, and a sliding groove is provided on one side of each of the two waterproof rubber blocks located in the same mounting groove, with the two drive shafts respectively movably mounted in the two sliding grooves.

[0013] Preferably, a drive frame is provided on one side of the waterproof seat, and a drive hole is provided on the drive frame. A drive rod is installed at one end of each of the rotating frames, and a drive shaft is installed on each drive rod. The drive shaft is movably installed in the drive hole. A pressing rod is installed on both sides of the drive frame, and the two pressing rods are in contact with two abutting rods respectively. Two vertical slots are provided on one side of the waterproof seat, and two vertical blocks are installed on the drive frame. The two vertical blocks are slidably installed in the two vertical slots respectively.

[0014] Preferably, it further includes a clamping mechanism for clamping the wire, the clamping mechanism being drively connected to the drive mechanism.

[0015] Preferably, the clamping mechanism includes multiple clamping rods, which are movably installed in the wiring holes. Two fixed seats are installed on one side of the wiring base. Gear shafts are rotatably installed on both fixed seats, and gears are installed on both gear shafts. Linkage grooves are opened on both sides of the clamping frame. Linkage shafts are movably installed in both linkage grooves. The two linkage shafts are respectively installed on the two gears. A rack frame meshes on both gears, and the rack frame is installed on the drive frame.

[0016] Preferably, each of the two waterproof rubber blocks is provided with a limiting sliding hole, and a limiting sliding rod is installed in the two limiting sliding holes located on the same side. The two ends of the limiting sliding rod are respectively installed on the inner walls of the two sides of the mounting groove.

[0017] Compared with the prior art, the present invention, through the setting of the waterproof base, can effectively seal the position of the terminal block connecting the wires after the wiring is completed by closing the two protective rubber blocks and setting the sealing rubber gasket, thus ensuring the waterproof performance of the electricity meter and avoiding the problem of water seepage or moisture infiltration caused by the exposure of the wire connection, thereby ensuring the use of the electricity meter.

[0018] This invention, through its installation mechanism, allows for the convenient installation of a waterproof seat on the terminal block after the electricity meter has been wired. This is achieved by clamping two abutment rods on both sides of the terminal block. After the waterproof seat is installed, the drive frame can move, allowing the two waterproof rubber blocks to come closer together and clamp the wires. This enables the sealing process to be completed simultaneously with the installation of the waterproof seat, eliminating the need for manual operation and making it convenient to use.

[0019] This invention, through the setting of the clamping mechanism, allows the movement of the drive frame to synchronously drive the two rack frames to move when the waterproof seat is installed on the terminal block. The movement of the two rack frames drives the two gears to rotate, and the gears rotate on the fixed seat through the gear shaft. The rotation of the gears drives the linkage shaft to rotate, and the linkage shaft drives the clamping frame to move downward. The linkage shaft slides in the linkage groove, and the clamping frame can be driven to move downward through the linkage shaft. The downward movement of the clamping frame drives multiple clamping rods to move. The clamping rods can further clamp the wires in the wiring hole, avoiding the problem of loose wires and arcing caused by improper installation, and further ensuring the stability of the wiring. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection between the terminal block and the waterproof base of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the waterproof base of the present invention;

[0023] Figure 4 This is a schematic cross-sectional view of the waterproof base of the present invention;

[0024] Figure 5 For the present invention Figure 2 Enlarged structural diagram of part A in the middle;

[0025] Figure 6 This is a cross-sectional view of the mounting base of the present invention;

[0026] Figure 7 This is a longitudinal sectional view of the waterproof base of the present invention;

[0027] Figure 8 This is a schematic diagram of the rotating frame of the present invention;

[0028] Figure 9 This is a partial cross-sectional view of the clamping frame of the present invention.

[0029] In the diagram: 1. Electricity meter; 2. Terminal block; 3. Waterproof base; 301. Waterproof rubber block; 302. Connecting hole; 303. Mounting groove; 304. Restricting sliding hole; 305. Restricting sliding rod; 306. Arc groove; 307. Sealing rubber gasket; 4. Mounting mechanism; 401. Mounting base; 402. Clamping rod; 403. Clamping block; 404. Slot; 405. Mounting hole; 406. Connecting bolt; 407. Rotating shaft; 408. Placement groove; 409. Torsion spring; 5. Drive 501. Rotating hole; 502. Rotating frame; 503. Slide groove; 504. Drive shaft; 505. Drive rod; 506. Drive frame; 507. Drive hole; 508. Drive shaft; 509. Pressing rod; 510. Vertical groove; 511. Vertical block; 6. Pressing mechanism; 601. Pressing rod; 602. Pressing frame; 603. Fixed seat; 604. Gear shaft; 605. Gear; 606. Linkage groove; 607. Linkage shaft; 608. Rack frame; 7. Wiring hole. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figures 1 to 9 As shown, this embodiment provides a waterproof structure for an electricity meter, including an electricity meter 1 and a terminal block 2 installed on its bottom side. A waterproof seat 3 is provided on the side of the terminal block 2 away from the electricity meter 1. The waterproof seat 3 is connected to the terminal block 2. A plurality of communication holes 302 are provided on the waterproof seat 3. A plurality of wiring holes 7 are provided on the bottom side of the terminal block 2. The communication holes 302 are adapted to the wiring holes 7.

[0033] An installation groove 303 is provided on the inner wall of the connecting hole 302. Two waterproof rubber blocks 301 are movably installed in the installation groove 303 to clamp the wire. An arc-shaped groove 306 is provided on the side of the two waterproof rubber blocks 301 that are close to each other. The radius of the arc-shaped groove 306 is smaller than the radius of the wire. A sealing rubber gasket 307 is installed on the top side of the waterproof seat 3. The sealing rubber gasket 307 is compatible with the terminal block 2.

[0034] Each of the two waterproof rubber blocks 301 has a limiting sliding hole 304. A limiting sliding rod 305 is installed in the two limiting sliding holes 304 located on the same side. The two ends of the limiting sliding rod 305 are respectively installed on the inner walls of the two sides of the mounting groove 303.

[0035] It should be noted that when installing the wire on the terminal block 2 of the electricity meter 1, the wire can first be passed through the connecting hole 302 and then connected to the wiring hole 7 on the terminal block 2. After the wiring is completed, the waterproof seat 3 can be moved so that it can be installed on the terminal block 2. At this time, the two waterproof rubber blocks 301 can approach each other and slide horizontally on the limiting sliding rod 305 through the limiting sliding hole 304. This allows the two waterproof rubber blocks 301 to approach each other and clamp the wire. The waterproof rubber blocks 301 are elastic and can clamp the wire tightly. After the waterproof seat 3 is installed, the sealing rubber gasket 307 can make tight contact with the terminal block 2, which can fully ensure that the gap between the wire and the electricity meter can be fully sealed after the wire is installed, and there will be no problem of water leakage or water vapor seeping into the terminal block 2.

[0036] Example 2

[0037] like Figure 4 , Figure 5 and Figure 6 As shown, this embodiment provides a waterproof structure for an electricity meter. Based on embodiment 1, it further includes an installation mechanism 4 for mounting a waterproof base 3. The installation mechanism 4 is installed on both sides of the waterproof base 3. The installation mechanism 4 includes two mounting seats 401, which are respectively installed on both sides of the waterproof base 3. Each mounting seat 401 is equipped with a rotating shaft 407, and each rotating shaft 407 is rotatably mounted with a clamping rod 402. Both sides of the terminal block 2 are provided with slots 404, and the two clamping rods 402 are close to each other. Each side is equipped with a clamping block 403, and the two clamping blocks 403 are respectively adapted to two slots 404. The clamping rod 402 is provided with a placement groove 408, and a torsion spring 409 is installed in the placement groove 408. One end of the torsion spring 409 is installed on the inner wall of the placement groove 408, and the other end of the torsion spring 409 is installed on the rotating shaft 407. The waterproof seat 3 is provided with two mounting holes 405, and a connecting bolt 406 is slidably installed in each of the two mounting holes 405. Both connecting bolts 406 are threaded on the bottom side of the terminal block 2.

[0038] It should be noted that when installing the waterproof seat 3 onto the terminal block 2, first, the two connecting bolts 406 are passed through the two mounting holes 405 and stretched and installed on the terminal block 2. The two connecting bolts 406 can act as sliding pillars, moving the waterproof seat 3 upward, causing the two mounting seats 401 to drive the two clamping rods 402 to move upward. The clamping rods 402 drive the clamping blocks 403 to move upward. The clamping blocks 403 are squeezed and move outward, driving the clamping rods 402 to move. The clamping rods 402 rotate on the rotating shaft 407, driving the torsion spring 409 to be stressed. When the clamping blocks 403 move into the slot 404, under the reaction force of the torsion spring 409, the clamping rods 402 are reset. The clamping rods 402 drive the clamping blocks 403 to be locked in the slot 404, thus locking the waterproof seat 3 onto the terminal block 2.

[0039] Example 3

[0040] like Figure 3 , Figure 5 and Figure 6 As shown, this embodiment provides a waterproof structure for an electricity meter. Based on embodiments 1 and 2, it further includes a drive mechanism 5. The drive mechanism 5 includes multiple rotating frames 502. Rotating holes 501 are provided on one inner wall of each mounting groove 303. The rotating frames 502 are rotatably installed within the rotating holes 501. Two drive shafts 504 are rotatably installed on one side of each rotating frame 502. Sliding grooves 503 are provided on one side of each of the two waterproof rubber blocks 301 located in the same mounting groove 303. The two drive shafts 504 are movably installed within the two sliding grooves 503. The waterproof seat 3... A drive frame 506 is provided on one side, and a drive hole 507 is provided on the drive frame 506. A drive rod 505 is installed at one end of all rotating frames 502. A drive shaft 508 is installed on the drive rod 505. The drive shaft 508 is movably installed in the drive hole 507. A pressing rod 509 is installed on both sides of the drive frame 506. The two pressing rods 509 are in contact with the two pressing rods 402 respectively. Two vertical slots 510 are provided on one side of the waterproof seat 3. Two vertical blocks 511 are installed on the drive frame 506. The two vertical blocks 511 are slidably installed in the two vertical slots 510 respectively.

[0041] It should be noted that when the waterproof seat 3 is installed, causing the clamping rod 402 to move outward under force, the clamping rod 402 presses the pressing rod 509 downward. The pressing rod 509 drives the drive frame 506 downward. The drive frame 506 slides vertically in the two vertical slots 510 through the two vertical blocks 511. The downward movement of the drive frame 506 drives all the drive shafts 508 to move through the drive hole 507. The drive shafts 508 drive the driving rod 505 to rotate. The driving rod 505 drives the rotating frame 502 to rotate. The rotating frame 502 drives the two waterproof rubber blocks 301 to move closer to each other through the two driving shafts 504 to clamp the wire. This enables the two waterproof rubber blocks 301 to clamp a wire simultaneously when the waterproof seat 3 is installed, thus completing the sealing of the wire.

[0042] It should be emphasized that the upper surface of the extrusion rod 509 is arc-shaped on the side near the electricity meter 1, which can effectively reduce resistance when the clamping rod 402 moves outward to extrude the extrusion rod 509.

[0043] Example 4

[0044] like Figure 3 and Figure 9 As shown, the waterproof structure of the electricity meter provided in this embodiment, based on embodiment 3, further includes a clamping mechanism 6 for clamping the wire. The clamping mechanism 6 is connected to the drive mechanism 5. The clamping mechanism 6 includes multiple clamping rods 601, which are movably installed in multiple wiring holes 7. Two fixed seats 603 are installed on one side of the terminal block 2. Gear shafts 604 are rotatably installed on both fixed seats 603. Gears 605 are installed on both gear shafts 604. Linkage grooves 606 are opened on both sides of the clamping frame 602. Linkage shafts 607 are movably installed in both linkage grooves 606. The two linkage shafts 607 are respectively installed on the two gears 605. A rack frame 608 meshes on both gears 605. The rack frame 608 is installed on the drive frame 506.

[0045] It should be noted that when the waterproof seat 3 is installed on the terminal block 2, causing the drive frame 506 to move downwards, the drive frame 506 can drive the two rack frames 608 to move. The movement of the two rack frames 608 drives the two gears 605 to rotate. The gears 605 rotate on the fixed seat 603 through the gear shaft 604. At the same time, the rotation of the gears 605 drives the linkage shaft 607 to rotate. The linkage shaft 607 rotates in the linkage groove 606, which can drive the clamping frame 602 to move downwards. At the same time, the linkage shaft 607 slides in the linkage groove 606. When the clamping frame 602 moves downwards, it drives multiple clamping rods 601 to move. The clamping rods 601 can further clamp the wires in the wiring hole 7, avoiding the problem of loose wires and arcing caused by improper installation. This can further ensure the stability of the wiring.

[0046] It should be emphasized that the clamping rod 601 of the clamping mechanism in this embodiment is made of an insulating material, such as plastic, to ensure insulation.

[0047] In summary, by utilizing the waterproof base 3, after wiring is completed, the two waterproof rubber blocks 301 can seal the bottom side of the wire, and the waterproof base 3 and the terminal block 2 are further sealed with a sealing rubber gasket 307, which effectively prevents water vapor from penetrating and ensures the waterproof box of the electricity meter 1.

[0048] In practical use, multiple wires are sequentially passed through multiple connecting holes 302 and then into the wiring hole 7 to complete the wiring operation. After wiring, the waterproof seat 3 is installed on the wiring seat 2 using two connecting bolts 406. Then, the waterproof seat 3 is moved upwards. This upward movement of the waterproof seat 3 causes the two mounting bases 401 to move the two clamping rods 402. The movement of the clamping rods 402 causes the clamping block 403 to move. The clamping block 403 contacts the wiring seat 2, and under pressure, it moves outwards, causing the clamping rods 402 to move as well. The clamping rod 402 rotates on the rotating shaft 407, causing the torsion spring 409 to be stressed. When the clamping block 403 moves into the slot 404, the clamping rod 402 returns to its original position under the reaction force of the torsion spring 409. The clamping rod 402 drives the clamping block 403 to be locked in the slot 404, which can lock the waterproof seat 3 onto the terminal block 2. At the same time as the clamping rod 402 moves outward, it can squeeze the two pressing rods 509 downward. The two pressing rods 509 drive the drive frame 506 downward. The downward movement of the drive frame 506 can drive multiple drive shafts 508 to move through the drive hole 507. When the drive shaft 508 moves, it drives the drive rod 505 to rotate, which in turn drives the rotating frame 502 to rotate. The rotating frame 502, through two drive shafts 504, drives two waterproof rubber blocks 301 to move closer together. The waterproof rubber blocks 301 move along the limiting sliding rod 305 through the limiting sliding hole 304. The two waterproof rubber blocks 301 can clamp the wire, completing the sealing of the wire. When the drive frame 506 moves downward, it can drive the two rack frames 608 to move. The movement of the two rack frames 608 drives the two gears 605 to rotate. The gears 605 pass through... The gear shaft 604 rotates on the fixed base 603. The rotation of the gear 605 drives the linkage shaft 607 to rotate. The linkage shaft 607 drives the clamping frame 602 to move downward. The linkage shaft 607 slides in the linkage groove 606. The linkage shaft 607 can drive the clamping frame 602 to move downward. The downward movement of the clamping frame 602 drives multiple clamping rods 601 to move. The clamping rods 601 can further clamp the wires in the wiring hole 7, avoiding the problem of loose wires and arcing caused by improper installation. This can further ensure the stability of the wiring.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit and essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waterproof structure for an electricity meter, characterized in that, The device includes an electricity meter (1) and a terminal block (2) installed on its bottom side. The terminal block (2) has a waterproof seat (3) on the side away from the electricity meter (1). The waterproof seat (3) is connected to the terminal block (2). The waterproof seat (3) has multiple connecting holes (302). The bottom side of the terminal block (2) has multiple wiring holes (7). The connecting holes (302) are adapted to the wiring holes (7). An installation groove (303) is provided on the inner wall of the connecting hole (302). Two waterproof rubber blocks (301) are movably installed in the installation groove (303) to clamp the wire. An arc-shaped groove (306) is provided on the side of the two waterproof rubber blocks (301) that are close to each other. The radius of the arc-shaped groove (306) is smaller than the radius of the wire. A sealing rubber pad (307) is installed on the top side of the waterproof seat (3). The sealing rubber pad (307) is compatible with the terminal block (2). It also includes a mounting mechanism (4) for mounting the waterproof seat (3), the mounting mechanism (4) being arranged on both sides of the waterproof seat (3); It also includes a drive mechanism (5), which includes multiple rotating frames (502). All of the mounting slots (303) have a rotating hole (501) on one side inner wall. The rotating frames (502) are rotatably installed in the rotating holes (501). Two drive shafts (504) are rotatably mounted on one side of the rotating frame (502). Each of the two waterproof rubber blocks (301) located in the same mounting groove (303) has a sliding groove (503) on one side. The two drive shafts (504) are respectively movably mounted in the two sliding grooves (503). A drive frame (506) is provided on one side of the waterproof seat (3). A drive hole (507) is provided on the drive frame (506). A drive rod (505) is installed on one end of all the rotating frames (502). A drive shaft (508) is installed on the drive rod (505). The drive shaft (508) is movably installed in the drive hole (507). A pressing rod (509) is installed on both sides of the drive frame (506). Two vertical slots (510) are provided on one side of the waterproof seat (3). Two vertical blocks (511) are installed on the drive frame (506). The two vertical blocks (511) are slidably installed in the two vertical slots (510). It also includes a clamping mechanism (6) for clamping the wire, the clamping mechanism (6) being connected to the drive mechanism (5) in a transmission manner; The clamping mechanism (6) includes multiple clamping rods (601) and clamping frame (602). The clamping rods (601) are movably installed in the wiring hole (7). Two fixed seats (603) are installed on one side of the wiring seat (2). Gear shafts (604) are rotatably installed on both fixed seats (603). Gears (605) are installed on both gear shafts (604). Linkage grooves (606) are opened on both sides of the clamping frame (602). Linkage shafts (607) are movably installed in both linkage grooves (606). The two linkage shafts (607) are respectively installed on the two gears (605). A rack frame (608) meshes on both gears (605). The rack frame (608) is installed on the drive frame (506).

2. The waterproof structure of an electricity meter according to claim 1, characterized in that, The installation mechanism (4) includes two mounting seats (401), which are respectively installed on both sides of the waterproof seat (3). A rotating shaft (407) is installed on each of the two mounting seats (401), and a clamping rod (402) is rotatably installed on each of the two rotating shafts (407). A slot (404) is provided on both sides of the terminal block (2). A clamping block (403) is installed on the side of the two clamping rods (402) that are close to each other. The two clamping blocks (403) are respectively adapted to the two slots (404), and the two pressing rods (509) are in contact with the two clamping rods (402).

3. The waterproof structure of an electricity meter according to claim 2, characterized in that, The clamping rod (402) has a placement groove (408), and a torsion spring (409) is installed in the placement groove (408). One end of the torsion spring (409) is installed on the inner wall of the placement groove (408), and the other end of the torsion spring (409) is installed on the rotating shaft (407).

4. The waterproof structure of an electricity meter according to claim 1, characterized in that, The waterproof base (3) has two mounting holes (405), and a connecting bolt (406) is slidably installed in each of the two mounting holes (405). The two connecting bolts (406) are threaded onto the bottom side of the terminal block (2).

5. The waterproof structure of an electricity meter according to claim 1, characterized in that, Both of the waterproof rubber blocks (301) are provided with limiting sliding holes (304), and a limiting sliding rod (305) is installed in the two limiting sliding holes (304) located on the same side. The two ends of the limiting sliding rod (305) are respectively installed on the inner walls of the two sides of the mounting groove (303).

Images