Safe self-locking waterproof floor socket

Abstract

The utility model discloses a safe self-locking waterproof floor socket, which is characterized in that an inner frame is rotatably connected with a bottom box, and the inner frame is provided with a slotted hole; the movable part is connected with the lower surface of the inner frame and rotatably connected with the drag hook through a second rotating shaft, the drag hook is exposed out of the groove hole, the second rotating shaft is connected with one end of the connecting part, the connecting part rotates along with the second rotating shaft, the sliding rail is connected with the lower surface of the movable part, the sliding rail is slidably connected with the sliding part, and the sliding part is provided with a matching part corresponding to the connecting part. The matching part is connected with the connecting piece, a lock hole is formed in the inner frame, and the elastic piece is connected with the sliding piece. The waterproof pad is in close contact with the inner frame to seal a gap between the bottom box and the inner frame. Through the arrangement of the drag hook, the connecting piece and the sliding mechanism, when the drag hook is pulled, the connecting piece and the second rotating shaft synchronously move, and then the sliding piece is driven to slide on the sliding rail, so that the sliding piece is separated from the lock hole, namely, the bottom box and the inner frame are switched to be in an unlocking state. The arrangement of the waterproof pad enables the ground socket to have a waterproof function.

Description

Technical Field

[0001] The utility model relates to the technical field of waterproof floor sockets, in particular to a safe self-locking waterproof floor socket. Background Art

[0002] Traditional floor sockets usually include a bottom box and an inner frame, and the inner frame is used to cover the socket structure in the bottom box to protect the socket from the influence of the external environment, such as dust, moisture, etc. However, such traditional floor sockets often lack a self-locking function, and the inner frame and the bottom box are simply connected by rotation without an effective locking mechanism.

[0003] In actual use, due to the lack of a self-locking function, the inner frame is easily opened accidentally, causing the socket to be exposed, increasing the risk of electric shock and damage. This risk is particularly prominent in public places or places that are easily accessible to children. In addition, in the long-term use of traditional ground sockets, the friction and wear between the inner frame and the bottom box may also cause the inner frame to loosen or fall off, further increasing the risk of use; and the existing ground plugs have weak waterproof performance. When water penetrates into the ground plug, it is easy to cause dangers such as short circuits. Utility Model Content

[0004] Therefore, it is necessary to provide a safe self-locking waterproof floor socket to achieve the self-locking and waterproof functions of the floor socket.

[0005] To achieve the above purpose, the utility model provides a safe self-locking waterproof ground socket, comprising:

[0006] An outer frame, the outer frame is used to accommodate the inner frame;

[0007] An inner frame, the inner frame being rotatably connected to the outer frame via a first rotating shaft, and the inner frame being provided with a slot;

[0008] The self-locking device comprises a movable part, a hook, a connecting part, a sliding mechanism and an elastic part; the movable part is embedded in the inner frame, the hook is exposed in the slot, the movable part is rotatably connected to the hook through a second rotating shaft, the second rotating shaft is connected to one end of the connecting part, and the connecting part rotates following the rotation of the second rotating shaft, the sliding mechanism comprises a slide rail and a sliding part, the slide rail is connected to the movable part, the slide rail is slidably connected to the sliding part, the sliding part is provided with a matching part corresponding to the connecting part, the matching part is connected to the other end of the connecting part, when the connecting part rotates, the sliding part is pushed to slide on the slide rail, the outer frame is provided with a locking hole adapted to the sliding part, the elastic part is connected to the sliding part, and is used to reset the sliding part, and the reset sliding part drives the sliding part to be inserted into the locking hole, so that the inner frame and the outer frame are locked;

[0009] A waterproof pad is in close contact with the inner frame and the outer frame respectively to seal a gap between the outer frame and the inner frame.

[0010] Furthermore, the inner side wall of the outer frame is provided with a step for supporting the inner frame, and the upper surface of the step is connected to the waterproof pad.

[0011] Furthermore, the step is a rectangular ring, the waterproof pad is a rectangular ring, and the shape of the inner frame is a rectangle.

[0012] Furthermore, the waterproof pad is a rubber waterproof pad, an EVA waterproof pad or a silicone waterproof pad.

[0013] Furthermore, the matching portion is a matching groove on the sliding member, and the other end of the connecting member extends into the matching groove.

[0014] Furthermore, the aperture of the matching groove is larger than the width of the connecting piece.

[0015] Further, the sliding member is a slider, the sliding rail is provided with a sliding groove, the sliding groove is slidably connected to the sliding member, one end of the elastic member is connected to the side wall of the sliding groove, the other end of the elastic member is connected to the slider, and a locking channel is provided at one end of the sliding groove close to the lock hole, and the locking channel is used for allowing the sliding member to extend.

[0016] Furthermore, the side wall of the sliding groove and the side wall of the elastic member are both provided with a first mounting groove for accommodating two ends of the elastic member, and the elastic member is located at an end of the sliding member away from the locking hole.

[0017] Furthermore, the end of the first rotating shaft passes through the outside of the outer frame, the first rotating shaft is provided with a thread, the cross-section of the first rotating shaft is oval, the damper includes a plurality of damping plates, spacers and nuts, the plurality of damping plates are sequentially sleeved on the end of the first rotating shaft, the nut is threadedly connected to the end of the first rotating shaft and contacts the damping plate, the spacer is connected to the first rotating shaft and is located on the inner side of the inner frame.

[0018] By setting the hook, the connecting member and the sliding mechanism, when the hook is pulled, the connecting member and the second rotating shaft move synchronously, thereby driving the sliding member to slide on the slide rail, so that the sliding member is released from the lock hole, that is, the bottom box and the inner frame are switched to an unlocked state. By setting the waterproof pad, the floor plug has a waterproof function; the operation process is simple and clear, without complicated steps or tools, which greatly improves the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of the structure of a safe self-locking waterproof ground socket described in this embodiment;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a schematic diagram of the structure when the inner frame described in this embodiment is opened;

[0022] Figure 4 This is a schematic diagram of the structure of the bottom box and the self-locking device described in this embodiment;

[0023] Figure 5 This is a schematic diagram of the waterproof pad and the bottom box structure in this embodiment;

[0024] Figure 6 Schematic diagram of the structure of the self-locking device described in this embodiment;

[0025] Figure 7 This is a schematic diagram of the structure of the first rotating shaft and the damper in this embodiment.

[0026] Description of reference numerals:

[0027] 10. Outer frame; 20. Inner frame; 30. Self-locking device; 40. Waterproof pad;

[0028] 21. Slots;

[0029] 11. a first rotating shaft; 12. a damper;

[0030] 31. movable part; 32. hook; 33. connecting part; 34. sliding mechanism; 35. elastic part; 36. second rotating shaft;

[0031] 341. Slide rail; 342. Sliding member; 343. Matching groove; 344. Locking channel. DETAILED DESCRIPTION

[0032] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments and accompanying drawings.

[0033] See also Figures 1 to 7 This embodiment discloses a safe self-locking waterproof ground socket, comprising:

[0034] An outer frame 10, wherein the outer frame 10 is used to accommodate the inner frame 20;

[0035] An inner frame 20, the inner frame 20 is rotatably connected to the outer frame 10 via a first rotating shaft 11, and is used to cover the cavity. The inner frame 20 is provided with a slot 21;

[0036] The self-locking device 30 includes a movable part 31, a hook 32, a connecting part 33, a sliding mechanism 34 and an elastic part 35; the movable part 31 is connected to the inner frame 20, the movable part 31 is rotatably connected to the hook 32 through a second rotating shaft 36, the slot 21 exposes the hook 32, the second rotating shaft 36 is connected to one end of the connecting part 33, the connecting part 33 rotates with the rotation of the second rotating shaft 36, the sliding mechanism 34 includes a slide rail 341 and a sliding part 342, the slide rail 341 is connected to the movable part 31, the slide rail 34 1 is slidably connected with the sliding member 342, the sliding member 342 is provided with a matching portion corresponding to the connecting member 33, the matching portion is connected to the other end of the connecting member 33, when the connecting member 33 rotates, the sliding member 342 is pushed to slide on the slide rail 341, the outer frame 10 is provided with a locking hole adapted to the sliding member 342, the elastic member 35 is connected with the sliding member 342, and is used to reset the sliding member 342, and the reset sliding member 342 drives the sliding member 342 to be inserted into the locking hole, so that the inner frame 20 and the outer frame 10 are locked;

[0037] The waterproof pad 40 is in close contact with the inner frame 20 and the outer frame 10 to seal the gap between the outer frame 10 and the inner frame 20 .

[0038] The outer frame 10 has a through hole in the middle thereof adapted to the inner frame 20 , and the outer frame 10 is used to accommodate the inner frame 20 .

[0039] The inner frame 20 is rotatably connected to the outer frame 10 via the first rotating shaft 11. The inner frame 20 is used to cover the through hole of the outer frame 10. The inner frame 20 is used to protect the jacks from being contaminated by dust, water, etc., and also to prevent accidental touches.

[0040] In some embodiments, see Figure 4 The inner frame 20 includes: a first cover plate and a second cover plate, the first cover plate is placed on the second cover plate, the second cover plate is provided with a accommodating cavity for accommodating the self-locking device 30 or the second cover plate is provided with a notch for accommodating the self-locking device 30, the first cover plate is provided with a slot 21 to expose the hook 32, and the upper surface of the first cover plate is flat.

[0041] The movable member 31 is connected to the inner frame 20 , and the movable member 31 provides a supporting basis.

[0042] The hook 32 is rotatably connected to the movable member 31 via the second rotating shaft 36. Specifically, the second rotating shaft 36 is fixedly connected to the hook 32, and both ends of the second rotating shaft 36 are placed in the rotating cavity on the movable member 31. By pulling up the hook 32, the second rotating shaft 36 is rotated synchronously.

[0043] See also Figure 2 The slot hole 21 is provided on the first cover plate of the inner frame 20, and the slot hole 21 passes through the first cover plate. The slot hole 21 is used to accommodate the hook 32. When the hook 32 is placed in the slot hole 21, the upper surface of the hook 32 is flush with the upper surface of the inner frame 20 (that is, the surface of the first cover body).

[0044] The connecting member 33 is vertically arranged, and one end of the connecting member 33 is fixedly connected to the second rotating shaft 36; the connecting member 33 and the second rotating shaft 36 are perpendicularly arranged to each other, and the connecting member 33 moves synchronously with the hook 32; specifically, when the hook 32 flips upward, the connecting member 33 rotates around the second rotating shaft 36 toward the through hole direction of the outer frame 10.

[0045] The sliding mechanism 34 includes: the sliding rail 341 and the sliding member 342, wherein the sliding member 342 is slidably disposed on the sliding rail 341; the matching portion is disposed on the sliding member 342, and the matching portion and the sliding member 342 slide on the sliding rail 341 synchronously. Specifically, one end of the connecting member 33 away from the second rotating shaft 36 is adapted to the matching portion of the sliding mechanism 34, and the connecting member 33 drives the sliding member 342 to slide on the sliding rail 341 by driving the matching portion.

[0046] The outer frame 10 is provided with a locking hole, which is located on the side wall of the outer frame 10 opposite to the self-locking device 30, and the locking hole is adapted to the sliding member 342. When the sliding member 342 is placed in the locking hole, the inner frame 20 and the outer frame 10 are in a locked state; when the sliding member 342 is placed outside the locking hole, the inner frame 20 and the outer frame 10 are in an unlocked state.

[0047] The slide rail 341 is disposed in the movable member 31 , and the movable member 31 and the slide rail 341 are relatively stationary.

[0048] The elastic member 35 is connected to the sliding member 342 and is used to reset the sliding member 342 after releasing the hook 32. When resetting, the sliding member 342 moves toward the lock hole until the sliding member 342 is placed in the lock hole, completing the self-locking process.

[0049] In actual use, when the socket needs to be opened, the hook 32 is pulled, and the hook 32 drives the second rotating shaft 36 to rotate, thereby driving the connecting member 33 to rotate. At this time, the hook 32, the second rotating shaft 36 and the connecting member 33 rotate synchronously; the connecting member 33 pushes the matching portion to make the sliding member 342 slide on the sliding rail 341. The sliding action makes the sliding member 342 withdraw from the lock hole of the outer frame 10, thereby releasing the locking state of the inner frame 20 and the outer frame 10.

[0050] When the socket needs to be closed after use, the hook 32 is released, and the elastic member 35 resets the sliding member 342. During the reset process, the sliding member 342 is inserted into the lock hole of the outer frame 10 again, thereby realizing the automatic locking of the inner frame 20 and the outer frame 10.

[0051] The waterproof pad 40 can be disposed on the outer frame 10 or on the inner frame 20 . When the inner frame 20 is closed, the waterproof pad 40 is in close contact with the inner frame 20 and the outer frame 10 to seal the gap between the inner frame 20 and the outer frame 10 .

[0052] By setting the hook 32, the connecting member 33 and the sliding mechanism 34, when the hook 32 is pulled, the connecting member 33 and the second rotating shaft 36 move synchronously, thereby driving the sliding member 342 to slide on the slide rail 341, so that the sliding member 342 is released from the lock hole, that is, the bottom box and the inner frame 20 are switched to an unlocked state. By setting the waterproof pad 40, the floor plug has a waterproof function; the operation process is simple and clear, without complicated steps or tools, which greatly improves the convenience of use.

[0053] See also Figure 5 This embodiment discloses that the inner side wall of the outer frame 10 is provided with a step for supporting the inner frame 20 , and the upper surface of the step is connected to the waterproof pad 40 .

[0054] The side wall of the outer frame 10 has a step extending horizontally toward the inner frame 20. When the inner frame 20 is closed, the lower edge of the inner frame 20 is placed on the step. The waterproof pad 40 is placed on the step, and the waterproof pad 40 is adapted to the step. The step provides an area for placing the waterproof pad 40. When the inner frame 20 is covered, the lower edge of the inner frame 20 presses against the waterproof pad 40 located on the step.

[0055] Furthermore, when the inner frame 20 is covered, the lower edge of the inner frame 20 forms a downward pressure through the cooperation with the sliding member 342 through the lock hole, and presses the waterproof pad 40 to achieve sealing.

[0056] See also Figure 3 This embodiment discloses that the step is a rectangular ring, the waterproof pad 40 is a rectangular ring, and the shape of the inner frame 20 is a rectangle.

[0057] The waterproof pad 40 is adapted to the shape of the step and the lower edge of the inner frame 20; specifically, the step is rectangular, and the inner frame 20 is also rectangular. In order to ensure that the waterproof pad 40 is tightly connected to the lower edge of the inner frame 20 when the inner frame 20 is covered, the waterproof pad 40 is also a rectangular ring. This embodiment discloses that the waterproof pad 40 is a rubber waterproof pad 40, an EVA waterproof pad 40, or a silicone waterproof pad 40.

[0058] See also Figure 6 This embodiment discloses that the matching portion is a matching groove 343 on the sliding member 342 , and the other end of the connecting member 33 extends into the matching groove 343 .

[0059] The matching portion is the matching groove 343 provided on the sliding member 342 . Specifically, the matching groove 343 penetrates the sliding member 342 , and one end of the connecting member 33 away from the second rotating shaft 36 extends into the matching groove 343 .

[0060] When the connecting member 33 drives the sliding member 342 to slide, the connecting member 33 contacts the side wall of the matching groove 343; the rotating connecting member 33 can contact the side wall of the matching groove 343 along the sliding direction of the sliding member 342 to push the sliding member 342 to slide on the slide rail 341.

[0061] See also Figure 6 This embodiment discloses that the aperture of the matching groove 343 is larger than the width of the connecting member 33 .

[0062] In order to prevent the connecting member 33 from bending and being damaged, and to enable the sliding member 342 to achieve a locking function without pulling a pull ring when touching the outer frame 10 , the aperture of the matching groove 343 is larger than the width of the connecting member 33 .

[0063] The matching groove 343 is used to accommodate the connecting member 33. When the connecting member 33 does not drive the sliding member 342, the connecting member 33 contacts the inner wall of the matching groove 343 away from the lock hole, and there is a gap between the connecting member 33 and the inner wall of the matching groove 343 close to the lock hole. That is, when the sliding member 342 is driven to slide, the connecting member 33 directly drives the sliding member 342 to rotate; when the inner frame 20 and the outer frame 10 need to be closed, the inner frame 20 is pressed down so that the sliding member 342 contacts the outer frame 10, and the outer frame 10 presses the sliding member 342 so that the sliding member 342 slides along the slide rail 341. At this time, the matching groove 343 moves synchronously. Due to the setting of the gap, the sliding member 342 will not be limited by the connecting member 33.

[0064] Specifically, if the mating groove 343 is adapted to the connecting member 33 (i.e., the diameter of the hole 21 of the mating groove 343 is equal to the thickness of the connecting member 33), when the connecting member 33 rotates, the connecting member 33 will tilt, and the adapted mating groove 343 will cause the connecting member 33 to bend or the sliding member 342 to be damaged due to the lack of redundant arrangement.

[0065] See also Figure 6 This embodiment discloses that the sliding member 342 is a slider, the sliding rail 341 is provided with a sliding groove, the sliding groove is slidably connected to the sliding member 342, one end of the elastic member 35 is connected to the side wall of the sliding groove, the other end of the elastic member 35 is connected to the slider, and a locking channel 344 is provided at one end of the sliding groove close to the lock hole, and the locking channel 344 is used for the sliding member 342 to extend out.

[0066] The slide groove is a groove on the slide rail 341, and the slide groove is adapted to the slider, and the slider slides on the slide groove; the locking channel 344 is placed on the slide rail 341, and the locking channel 344 is connected to the slide groove, and the locking channel 344 is placed at one end of the slide groove close to the lock hole. It should also be noted that the locking channel 344 is adapted to the slider.

[0067] When the connecting member 33 drives the slider, the end of the slider slides out from the slide groove and the locking channel 344 until the end of the slider is placed in the locking hole, thereby realizing the locking function; or, the end of the slider escapes from the locking hole and is retracted into the slide groove, thereby realizing the unlocking function.

[0068] See also Figure 5 This embodiment discloses that the side wall of the slide groove and the side wall of the elastic member 35 are both provided with a first mounting groove for accommodating the two ends of the elastic member 35, and the elastic member 35 is located at one end of the sliding member 342 away from the lock hole.

[0069] The first mounting grooves are disposed on the two opposite side walls of the slide groove and the slider, and the two ends of the elastic member 35 are respectively connected to one of the first mounting grooves to achieve automatic reset of the slider, thereby achieving reset of the hook 32. Furthermore, the two first mounting grooves are disposed along the sliding direction of the slider.

[0070] The bottom of the slide groove is provided with a second installation groove for accommodating the elastic member 35, and the second installation groove is used to accommodate the elastic member 35 of a larger size. In this embodiment, the elastic member 35 can be a coil spring, a magnetic member, etc.

[0071] In some embodiments, see Figure 7 The end of the first rotating shaft 11 passes through the outside of the outer frame 10, the first rotating shaft 11 is provided with a thread, the cross-section of the first rotating shaft 11 is an oval circle, the damper 12 includes a plurality of damping plates and nuts, and the plurality of damping plates are sequentially sleeved on the end of the first rotating shaft 11, the nut is threadedly connected to the end of the first rotating shaft 11 and contacts the damping plate, the spacer is connected to the first rotating shaft 11, and is located on the inner side of the inner frame 20.

[0072] The inner frame 20 wall is provided with a circular through hole, and the outer frame 10 wall is provided with an oval circular through hole, which is adapted to the first rotating shaft 11; the first rotating shaft 11 passes through the oval circular through hole and the circular through hole in sequence.

[0073] The damping plate is provided with an oval through hole adapted to the first rotating shaft 11 in the middle portion, the damping plate is sleeved on the first rotating shaft 11, and the damping plate is located on the side of the outer frame 10 away from the inner frame 20, and the nut is sleeved on the end of the first rotating shaft 11 (that is, the side of the damping plate away from the outer frame 10).

[0074] It should also be noted that one end of the first rotating shaft 11 away from the nut is a disc to prevent the first rotating shaft 11 from falling out, and at the same time interact with the nut to achieve damping adjustment.

[0075] When in use, the damping strength is adjusted by rotating the nut to achieve any stopping or slow closing function of the inner frame 20 .

[0076] In some embodiments, a bottom box is also included. The bottom box is a hollow structure with an opening at the top. The top opening is connected to the hollow part. The cavity is used to accommodate the jack structure. The jack structure includes: a socket, a socket bracket and other structures. The outer frame 10 is covered on the opening of the bottom box.

[0077] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "include..." or "comprise..." do not exclude the existence of other elements in the process, method, article or terminal device including the elements. In addition, in this article, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself.

[0078] Although the above embodiments have been described, once the technical personnel in the field know the basic creative concept, they can make other changes and modifications to these embodiments. Therefore, the above description is only the embodiment of the utility model, and it does not limit the patent protection scope of the utility model. Any equivalent structure or equivalent process transformation made by using the contents of the utility model specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the utility model.

Claims

1. A safe self-locking waterproof ground socket, characterized in that: include: An outer frame, the outer frame is used to accommodate the inner frame; An inner frame, the inner frame being rotatably connected to the outer frame via a first rotating shaft, and the inner frame being provided with a slot; The self-locking device comprises a movable part, a hook, a connecting part, a sliding mechanism and an elastic part; the movable part is embedded in the inner frame, the hook is exposed in the slot, the movable part is rotatably connected to the hook through a second rotating shaft, the second rotating shaft is connected to one end of the connecting part, and the connecting part rotates following the rotation of the second rotating shaft, the sliding mechanism comprises a slide rail and a sliding part, the slide rail is connected to the movable part, the slide rail is slidably connected to the sliding part, the sliding part is provided with a matching part corresponding to the connecting part, the matching part is connected to the other end of the connecting part, when the connecting part rotates, the sliding part is pushed to slide on the slide rail, the outer frame is provided with a locking hole adapted to the sliding part, the elastic part is connected to the sliding part, and is used to reset the sliding part, and the reset sliding part drives the sliding part to be inserted into the locking hole, so that the inner frame and the outer frame are locked; A waterproof pad is in close contact with the inner frame and the outer frame respectively to seal a gap between the outer frame and the inner frame.

2. The safety self-locking waterproof ground socket according to claim 1, characterized in that: The inner side wall of the outer frame is provided with a step for supporting the inner frame, and the upper surface of the step is connected to the waterproof pad.

3. The safety self-locking waterproof ground socket according to claim 2, characterized in that: The step is a rectangular ring, the waterproof pad is a rectangular ring, and the inner frame is in a rectangular shape.

4. The safety self-locking waterproof ground socket according to claim 1, characterized in that: The waterproof pad is a rubber waterproof pad, an EVA waterproof pad or a silicone waterproof pad.

5. The safety self-locking waterproof ground socket according to claim 1, characterized in that: The matching portion is a matching groove on the sliding member, and the other end of the connecting member extends into the matching groove.

6. The safety self-locking waterproof ground socket according to claim 5, characterized in that: The aperture of the matching groove is larger than the width of the connecting piece.

7. The safety self-locking waterproof ground socket according to claim 1, characterized in that: The sliding member is a slider, the sliding rail is provided with a sliding groove, the sliding groove is slidably connected to the sliding member, one end of the elastic member is connected to the side wall of the sliding groove, the other end of the elastic member is connected to the slider, and a locking channel is provided at one end of the sliding groove close to the lock hole, and the locking channel is used for allowing the sliding member to extend.

8. The safety self-locking waterproof ground socket according to claim 7, characterized in that: The side wall of the sliding groove and the side wall of the elastic member are both provided with a first mounting groove for accommodating two ends of the elastic member, and the elastic member is located at an end of the sliding member away from the locking hole.

9. The safety self-locking waterproof ground socket according to claim 1, characterized in that: Also includes: Dampers; The end of the first rotating shaft passes through the outside of the outer frame, the first rotating shaft is provided with a thread, the cross-section of the first rotating shaft is oval, the damper includes a plurality of damping plates, spacers and nuts, the plurality of damping plates are sequentially sleeved on the end of the first rotating shaft, the nut is threadedly connected to the end of the first rotating shaft and contacts the damping plate, the spacer is connected to the first rotating shaft and is located on the inner side of the inner frame.

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