A collapsible safety net assembly mounted on a trampoline chassis
By installing a foldable safety net assembly on the trampoline base, and utilizing the cooperation of hydraulic push rods and sliding control panels, the safety net can be unfolded and retracted, solving the problem of insufficient protection range of the trampoline, improving safety, and extending the service life of the safety net.
Patent Information
- Application Number
- CN202211715188.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-29
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2042-12-29
AI Technical Summary
Existing trampoline devices have a fixed protection range, which cannot expand the protection area of the original trampoline, resulting in insufficient safety and failure to provide protection on the sides of the trampoline, making it easy to fall from the side during use.
Design a foldable safety net assembly, including a supporting top plate, a control sleeve, a sliding port, a hydraulic push rod, a moving ring, a control rod, and an elastic protective net. Through the cooperation of the hydraulic push rod and the sliding control plate, the protective net can be unfolded and folded, expanding the protective area and providing side protection.
The increased protective area of the trampoline improves safety, prevents side falls, and extends the lifespan of the protective net through a dustproof storage device.
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Figure CN115999136B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of trampolines, in particular to a foldable safety net assembly installed on a trampoline chassis. BACKGROUND
[0002] A trampoline is an entertainment activity and a training tool for acrobatics, and athletes perform acrobatics while jumping on the trampoline. In competitions, these can include jumps in simple straight lines, crouches, bends or straddling positions, as well as more complex forward or backward somersaults and twisting combinations. As an entertainment tool, trampolines have always been popular with children, are interesting, and also have a certain exercise function, so more and more fitness places will also be equipped with trampolines and other facilities to enable people to exercise, and trampolines also have a very beautiful nickname, which is called "air ballet". In addition to weight loss and body shaping, trampolines are not inferior to any other activity in terms of stress relief and protection of physical and mental balance. Studies have shown that trampolining is not only beneficial to adult health but also effective for children's physical performance, temperament development, and also beneficial to children's height increase and brain development. For many years, jumping on trampolines has been considered an entertainment activity for people of all ages. However, as the sales and popularity of home and backyard entertainment trampolines increase, the number of injuries has also increased, and many trampoline injuries are due to loss of direction or control and falling off the trampoline.
[0003] The existing device has a fixed protection range, cannot expand the protection area of the original trampoline, cannot guarantee safety, and cannot provide protection on the side of the trampoline, so people are prone to falling from the side when using the trampoline, and the practicality is poor. SUMMARY
[0004] To solve the above technical problems, the present application provides a foldable safety net assembly installed on a trampoline chassis, comprising a support top plate, a control sleeve is installed at the bottom of the support top plate, a sliding opening is formed on the outer side of the control sleeve, a folding guard net device is installed at the bottom of the control sleeve, a support column is arranged at the bottom of the folding guard net device, a reinforced bottom plate is fixedly connected to the bottom of the support column, and a support base is installed on the outer side of the reinforced bottom plate.
[0005] The folding guard net device comprises:
[0006] A sliding control plate has a rectangular plate structure, and a hydraulic push rod is arranged at one end of the sliding control plate, and the movable end of the hydraulic push rod is fixedly connected with the sliding control plate.
[0007] The mobile ring has a ring structure, and a control rod is arranged outside the mobile ring, the outside of the mobile ring is rotationally connected with the control rod through a rotating seat, the bottom of the control rod is rotationally connected with a storage device through a rotating pin, one side of the storage device is provided with a fixed plate, and the side, away from the storage device, of the fixed plate is provided with an elastic protective net.
[0008] The limiting sleeve has a cylindrical structure, the outside of the limiting sleeve is rotationally connected with the end of the storage device through a rotating seat, and the supporting top plate is installed on the trampoline chassis; when it is necessary to open the protective net, the hydraulic push rod is opened to drive the mobile ring to slide to the bottom of the sliding opening through the sliding control plate; at this time, the mobile ring drives the fixed plate to be pressed down through the control rod, and drives the elastic protective net to be unfolded to the maximum state; the unfolded elastic protective net can expand the original protective area of the trampoline, and increase the safety; the sliding control plate drives the mobile ring to move to different positions, and the unfolding range of the elastic protective net is different; when the elastic protective net is contracted to an inclined state, the side surface of the trampoline can be protected, and people can be prevented from falling from the side.
[0009] Preferably, the sliding opening and the supporting base are each provided with multiple groups, the bottom of the hydraulic push rod is fixedly connected with the inside bottom of the control sleeve, the sliding control plate is provided with multiple groups and corresponds to the sliding opening in one-to-one manner, and the end, away from the hydraulic push rod, of the sliding control plate penetrates through the sliding opening.
[0010] Preferably, the inside wall of the mobile ring is fixedly connected with the end, away from the hydraulic push rod, of the sliding control plate, the sliding control plate is slidably connected with the inside wall of the sliding opening, and the control rod and the storage device are each provided with multiple groups; when it is necessary to store the protective net, the sliding control plate is driven to slide to the top of the control sleeve through the hydraulic push rod; at this time, the sliding control plate drives the mobile ring to move to the bottom of the supporting top plate along the sliding opening, and the mobile ring drives the elastic protective net to be tightened through the control rod, so that the elastic protective net can be wound up; the unfolding and storage of the elastic protective net can be completed through the hydraulic push rod, and the elastic protective net can be conveniently folded or unfolded.
[0011] Preferably, the limiting sleeve is sleeved outside the supporting column and is fixedly connected with the supporting column, the mobile ring is sleeved outside the control sleeve, and the top of the limiting sleeve is fixedly connected with the bottom of the control sleeve.
[0012] Preferably, the storage device comprises a supporting sleeve, the outer side of the supporting sleeve is provided with a device opening, the inside of the supporting sleeve is connected with a winding roller through a clock spring, the outer side of the winding roller is provided with a winding dust cloth, the two ends of the winding dust cloth are fixedly connected with magnet strips, the inner wall of the device opening is provided with a rolling brush device, when the control rod tightens the elastic protective net to a certain extent, the magnet strips between the adjacent winding dust cloths on the outer side of the elastic protective net are attracted to each other through magnetic force, since the winding dust cloth is wrapped around the winding roller from the center position, when the two groups of magnet strips are close, the winding dust cloth is pulled out from the supporting sleeve, at this time, the two ends of the winding dust cloth are in a tension state, the winding dust cloth is wrapped on the outer side of the elastic protective net, the elastic protective net can be stored and prevented from dust, the elastic protective net is prevented from being eroded by dust and impurities, and the service life of the elastic protective net is effectively improved.
[0013] Preferably, the outer side of the supporting sleeve is fixedly connected with a fixed plate, the bottom of the supporting sleeve is connected with a rotating seat, and the two ends of the winding dust cloth penetrate through the device opening.
[0014] Preferably, the winding dust cloth is wound on the outer side of the winding roller, and the magnet strips at the two ends of the winding dust cloth are magnetically opposite.
[0015] Preferably, the rolling brush device comprises a rotating shaft, the outer side of the rotating shaft is fixedly connected with a rolling shaft, the outer side of the rotating shaft is sleeved with a rotating cylinder, the outer side of the rotating cylinder is uniformly provided with a sliding cylinder, the inside of the sliding cylinder is provided with a return spring, one end of the return spring away from the sliding cylinder is fixedly connected with an arc-shaped brush plate, the magnet strips between the adjacent winding dust cloths are attracted to each other through magnetic force, the winding dust cloth is pulled out from the supporting sleeve, when the elastic protective net is unfolded, the distance between the magnet strips between the adjacent winding dust cloths is gradually increased, the clock spring drives the winding roller to wind the winding dust cloth back into the supporting sleeve, when the winding roller winds back, the outer side of the winding dust cloth is in contact with the rolling shaft, the rolling shaft rolls along the winding dust cloth, at this time, the return spring pushes the arc-shaped brush plate close to the side of the winding dust cloth, the winding dust cloth is cleaned, the cleanliness of the winding dust cloth can be maintained, and the winding dust cloth is convenient to use repeatedly.
[0016] Preferably, the rolling shaft is provided in multiple groups, the rolling shaft is made of rubber, and the outer side of the rolling shaft extends to the side of the winding dust cloth.
[0017] Preferably, the arc-shaped brush plate is provided in multiple groups, the outer side of the multiple groups of arc-shaped brush plates is uniformly provided with bristles, and the top and bottom of the rotating shaft are rotatably connected with the device opening through bearings.
[0018] The application provides a foldable safety net assembly mounted on a trampoline chassis.
[0019] 1. The foldable safety net assembly mounted on the trampoline chassis, through the installation of the folding guard net device, the support top plate is mounted on the trampoline chassis, when the guard net needs to be opened, the hydraulic push rod is opened to drive the moving ring to slide to the bottom of the sliding port through the sliding control plate, at this time the moving ring drives the fixed plate to be pressed down through the control rod, and the elastic guard net is unfolded to the maximum state, the expanded elastic guard net can expand the original protection area of the trampoline, increase the safety, the elastic guard net is unfolded to different degrees by moving the moving ring to different positions through the sliding control plate, when the elastic guard net is contracted to an inclined state, the trampoline side protection is provided, and falling from the side is avoided.
[0020] 2. The foldable safety net assembly mounted on the trampoline chassis, through the installation of the hydraulic push rod and the elastic guard net, when the guard net needs to be stored, the sliding control plate is pushed to the top of the control sleeve through the hydraulic push rod, at this time the sliding control plate drives the moving ring to move along the sliding port to the bottom of the support top plate, and the elastic guard net is tightened through the control rod, so that the elastic guard net is wound, and the elastic guard net can be unfolded and stored through the hydraulic push rod, so that the folding or unfolding is convenient.
[0021] 3. The foldable safety net assembly mounted on the trampoline chassis, through the installation of the storage device, when the control rod tightens the elastic guard net to a certain degree, the magnet strips between the adjacent dust collecting cloths are attracted to each other through magnetic force, since the dust collecting cloth is wrapped around the winding roller from the center position, when the two groups of magnet strips are close, the dust collecting cloth is pulled out of the support sleeve, at this time the two ends of the dust collecting cloth are in a tension state, the dust collecting cloth is wrapped outside the elastic guard net, the elastic guard net can be stored and dustproofed, dust and impurities are prevented from eroding the elastic guard net, and the service life of the elastic guard net is effectively prolonged.
[0022] 4. The foldable safety net assembly mounted on the trampoline chassis, through the installation of the rolling brush device and the storage device, the magnet strips between the adjacent dust collecting cloths are attracted to each other through magnetic force, and the dust collecting cloth is pulled out of the support sleeve, when the elastic guard net is unfolded, the distance between the magnet strips between the adjacent dust collecting cloths is gradually increased, the clock spring drives the winding roller to wind the dust collecting cloth back into the support sleeve, when the winding roller winds back, the outside of the dust collecting cloth is in contact with the rolling shaft, the rolling shaft rolls along the dust collecting cloth, at this time the reset spring pushes the arc-shaped brush plate close to the side of the dust collecting cloth, and the dust collecting cloth is cleaned, so that the cleanliness of the dust collecting cloth is maintained, and repeated use is facilitated. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is a structure diagram of the foldable safety net assembly mounted on the trampoline chassis.
[0024] Figure 2Structure disassembly view of the foldable safety net assembly installed on the trampoline chassis of the present application;
[0025] Figure 3 Internal structure schematic view of the control sleeve of the present application;
[0026] Figure 4 Structure schematic view of the folding guard net device of the present application;
[0027] Figure 5 Structure schematic view of the control rod of the present application;
[0028] Figure 6 Structure schematic view of the storage device of the present application;
[0029] Figure 7 Structure schematic view of the winding roller of the present application;
[0030] Figure 8 Structure schematic view of the rolling brush device of the present application.
[0031] In the figure: 1, support top plate; 2, control sleeve; 3, sliding port; 4, folding guard net device; 41, sliding control plate; 42, hydraulic push rod; 43, moving ring; 44, control rod; 45, rotating seat; 46, rotating bolt; 47, storage device; 471, support sleeve; 472, device port; 473, clockwork spring; 474, winding roller; 475, winding dust cloth; 476, magnet strip; 477, rolling brush device; 4771, rotating shaft; 4772, rolling shaft; 4773, rotating cylinder; 4774, sliding cylinder; 4775, reset spring; 4776, arc-shaped brush plate; 48, fixed plate; 49, elastic protective net; 410, limiting sleeve; 411, rotating seat; 5, support column; 6, reinforced bottom plate; 7, support base. DETAILED DESCRIPTION
[0032] The present application will be further described below in conjunction with the drawings and specific embodiments. The embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the present application and its practical application, and to enable others skilled in the art to understand the present application for various embodiments with various modifications as are suited to the particular use contemplated.
[0033] Embodiment one
[0034] Please refer to Figures 1-5The application provides a technical scheme: a foldable safety net assembly installed on a trampoline chassis, comprising a support top plate 1, a control sleeve 2 installed at the bottom of the support top plate 1, a sliding opening 3 formed in the outer side of the control sleeve 2, a folding guard net device 4 installed at the bottom of the control sleeve 2, a support column 5 arranged at the bottom of the folding guard net device 4, a reinforcing bottom plate 6 fixedly connected to the bottom of the support column 5, and a support base 7 installed at the outer side of the reinforcing bottom plate 6.
[0035] The folding guard net device 4 comprises:
[0036] A sliding control plate 41 has a rectangular plate structure, and a hydraulic push rod 42 is arranged at one end of the sliding control plate 41, and the movable end of the hydraulic push rod 42 is fixedly connected to the sliding control plate 41.
[0037] A moving ring 43 has a ring structure, and a control rod 44 is arranged at the outer side of the moving ring 43, the outer side of the moving ring 43 is rotationally connected to the control rod 44 through a rotating seat 45, the bottom of the control rod 44 is rotationally connected to a storage device 47 through a rotating bolt 46, a fixed plate 48 is installed on one side of the storage device 47, and an elastic protective net 49 is installed on the side, away from the storage device 47, of the fixed plate 48.
[0038] A limiting sleeve 410 has a cylindrical structure, and the outer side of the limiting sleeve 410 is rotationally connected to the end of the storage device 47 through a rotating seat 411.
[0039] The sliding opening 3 and the support base 7 are both provided with multiple groups, the bottom of the hydraulic push rod 42 is fixedly connected to the inner bottom of the control sleeve 2, the sliding control plate 41 is provided with multiple groups and corresponds to the sliding opening 3 one by one, and the end, away from the hydraulic push rod 42, of the sliding control plate 41 penetrates through the sliding opening 3.
[0040] The inner wall of the moving ring 43 is fixedly connected to the end, away from the hydraulic push rod 42, of the sliding control plate 41, the sliding control plate 41 is slidingly connected to the inner wall of the sliding opening 3, and the control rod 44 and the storage device 47 are both provided with multiple groups.
[0041] The limiting sleeve 410 is sleeved on the outer side of the support column 5 and is fixedly connected to the support column 5, the moving ring 43 is sleeved on the outer side of the control sleeve 2, and the top of the limiting sleeve 410 is fixedly connected to the bottom of the control sleeve 2.
[0042] When in use, the support top plate 1 is installed on the trampoline chassis, when it is needed to open the protective net, the hydraulic push rod 42 drives the sliding control plate 41 to drive the moving ring 43 to slide to the bottom of the sliding opening 3, at this time, the moving ring 43 drives the fixed plate 48 to be pressed down through the control rod 44, and drives the elastic protective net 49 to be unfolded to the maximum state, the unfolded elastic protective net 49 can expand the original protective area of the trampoline, and the safety is increased, the elastic protective net 49 is unfolded to different degrees by driving the moving ring 43 to move to different positions through the sliding control plate 41, when the elastic protective net 49 is contracted to the inclined state, the trampoline side protection is provided, and falling from the side is avoided.
[0043] When it is needed to store the protective net, the sliding control plate 41 is pushed to slide to the top of the control sleeve 2 through the hydraulic push rod 42, at this time, the sliding control plate 41 drives the moving ring 43 to move along the sliding opening 3 to the bottom of the support top plate 1, and the elastic protective net 49 is tightened through the control rod 44, so that the winding of the elastic protective net 49 is completed, and the elastic protective net 49 can be unfolded and stored through the hydraulic push rod 42, so that folding or unfolding is convenient.
[0044] Embodiment two
[0045] Please refer to Figures 1-8 The application provides a technical scheme: on the basis of embodiment one, the storage device 47 comprises a support sleeve 471, a device opening 472 is formed in the outer side of the support sleeve 471, a winding roller 474 is connected to the inside of the support sleeve 471 through a clockwork spring 473, a winding dust cloth 475 is arranged on the outer side of the winding roller 474, and a magnet strip 476 is fixedly connected to the two ends of the winding dust cloth 475.
[0046] The outer side of the support sleeve 471 is fixedly connected with the fixed plate 48, the bottom of the support sleeve 471 is connected with the rotating seat 411, and the two ends of the winding dust cloth 475 penetrate through the device opening 472.
[0047] The winding dust cloth 475 is wound on the outer side of the winding roller 474, and the magnet strips 476 at the two ends of the winding dust cloth 475 are magnetically opposite.
[0048] The rolling brush device 477 comprises a rotating shaft 4771, a rolling shaft 4772 is fixedly connected to the outer side of the rotating shaft 4771, a rotating cylinder 4773 is sleeved on the outer side of the rotating shaft 4771, sliding cylinders 4774 are uniformly installed on the outer side of the rotating cylinder 4773, a reset spring 4775 is installed in the inside of the sliding cylinder 4774, and an arc-shaped brush plate 4776 is fixedly connected to the end, away from the sliding cylinder 4774, of the reset spring 4775.
[0049] The rolling shaft 4772 is provided in multiple groups, the rolling shaft 4772 is made of rubber, and the outer side of the rolling shaft 4772 extends to the side of the winding dust cloth 475.
[0050] The arc-shaped brush plates 4776 are provided with a plurality of groups, and the outer sides of the plurality of groups of arc-shaped brush plates 4776 are uniformly provided with brush hairs. The top and bottom of the rotating shaft 4771 are rotationally connected with the device port 472 through bearings.
[0051] In use, when the control rod 44 tightens the elastic protective net 49 to a certain extent, the magnet strips 476 between the adjacent dust-proof cloths 475 on the outer side of the elastic protective net 49 are attracted to each other by magnetic force. Since the dust-proof cloths 475 are wrapped around the winding roller 474 from the center position, when the two groups of magnet strips 476 are close, the dust-proof cloths 475 are pulled out of the supporting sleeve 471, and at this time, the two ends of the dust-proof cloths 475 are in a tension state. The dust-proof cloths 475 are wrapped around the outer side of the elastic protective net 49, and can be used to dust-proof the elastic protective net 49, avoid the elastic protective net 49 from being eroded by dust and impurities, and effectively improve the service life of the elastic protective net 49.
[0052] The magnet strips 476 between the adjacent dust-proof cloths 475 are attracted to each other by magnetic force, and the dust-proof cloths 475 are pulled out of the supporting sleeve 471. When the elastic protective net 49 is being unfolded, the distance between the magnet strips 476 between the adjacent dust-proof cloths 475 gradually increases, and the clock spring 473 drives the winding roller 474 to wind the dust-proof cloths 475 back into the supporting sleeve 471. When the winding roller 474 is rewinding, the outer side of the dust-proof cloths 475 is in contact with the roller shaft 4772, and the roller shaft 4772 rolls along the dust-proof cloths 475. At this time, the reset spring 4775 pushes the arc-shaped brush plate 4776 close to the side of the dust-proof cloths 475, and the dust-proof cloths 475 are cleaned, so that the cleanliness of the dust-proof cloths 475 can be maintained, and the dust-proof cloths 475 can be repeatedly used.
[0053] Obviously, the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art and related fields without creative work should belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as without special description and limitation, are implemented according to the conventional means in the art.
Claims
1. A foldable safety net assembly mounted on a trampoline frame, comprising a supporting top plate (1), characterized in that: A control sleeve (2) is installed at the bottom of the supporting top plate (1). A sliding port (3) is opened on the outer side of the control sleeve (2). A folding protective net device (4) is installed at the bottom of the control sleeve (2). A support column (5) is provided at the bottom of the folding protective net device (4). A reinforcing base plate (6) is fixedly connected to the bottom of the support column (5). A support base (7) is installed on the outer side of the reinforcing base plate (6). The folding protective net device (4) includes: A sliding control plate (41) has a rectangular plate structure and a hydraulic push rod (42) disposed at one end of the sliding control plate (41), the movable end of the hydraulic push rod (42) being fixedly connected to the sliding control plate (41); A movable ring (43) having a ring structure and a control rod (44) disposed on the outside of the movable ring (43). The outside of the movable ring (43) is rotatably connected to the control rod (44) via a rotating seat (45). The bottom of the control rod (44) is rotatably connected to a storage device (47) via a rotating bolt (46). A fixing plate (48) is installed on one side of the storage device (47). An elastic protective net (49) is installed on the side of the fixing plate (48) away from the storage device (47). The inner wall of the moving ring (43) is fixedly connected to the end of the sliding control plate (41) away from the hydraulic push rod (42), the sliding control plate (41) is slidably connected to the inner wall of the sliding port (3), and multiple sets of the control rod (44) and the storage device (47) are provided. The limiting sleeve (410) has a cylindrical structure, and the outer side of the limiting sleeve (410) is rotatably connected to the end of the storage device (47) through a rotating seat (411).
2. A foldable safety net assembly installed on a trampoline frame according to claim 1, characterized in that: Multiple sets of sliding ports (3) and support bases (7) are provided. The bottom of the hydraulic push rod (42) is fixedly connected to the inner bottom of the control sleeve (2). Multiple sets of sliding control plates (41) are provided and correspond one-to-one with the sliding ports (3). The end of the sliding control plate (41) away from the hydraulic push rod (42) passes through the sliding port (3).
3. A foldable safety net assembly installed on a trampoline frame according to claim 1, characterized in that: The limiting sleeve (410) is sleeved on the outside of the support column (5) and fixedly connected to the support column (5). The moving ring (43) is sleeved on the outside of the control sleeve (2). The top of the limiting sleeve (410) is fixedly connected to the bottom of the control sleeve (2).
4. A foldable safety net assembly installed on a trampoline frame according to claim 1, characterized in that: The storage device (47) includes a support sleeve (471), with a device opening (472) on the outer side of the support sleeve (471). A winding roller (474) is connected inside the support sleeve (471) via a spring (473). A winding dustproof cloth (475) is provided on the outer side of the winding roller (474). Magnet strips (476) are fixedly connected to both ends of the winding dustproof cloth (475). A roller brush device (477) is provided on the inner wall of the device opening (472).
5. A foldable safety net assembly installed on a trampoline frame according to claim 4, characterized in that: The outer side of the support sleeve (471) is fixedly connected to the fixing plate (48), the bottom of the support sleeve (471) is connected to the rotating seat (411), and both ends of the rolled-up dustproof cloth (475) pass through the device opening (472).
6. A foldable safety net assembly installed on a trampoline frame according to claim 4, characterized in that: The take-up dustproof cloth (475) is wound around the outside of the take-up roller (474), and the magnetic strips (476) at both ends of the take-up dustproof cloth (475) have opposite magnetism.
7. A foldable safety net assembly installed on a trampoline frame according to claim 4, characterized in that: The roller brush device (477) includes a rotating shaft (4771), a roller (4772) is fixedly connected to the outside of the rotating shaft (4771), a rotating cylinder (4773) is sleeved on the outside of the rotating shaft (4771), and slide cylinders (4774) are evenly installed on the outside of the rotating cylinder (4773). A return spring (4775) is installed inside the slide cylinder (4774), and an arc-shaped brush plate (4776) is fixedly connected to the end of the return spring (4775) away from the slide cylinder (4774).
8. A foldable safety net assembly installed on a trampoline frame according to claim 7, characterized in that: Multiple sets of rollers (4772) are provided. The rollers (4772) are made of rubber and the outer side of the rollers (4772) extends to the side of the rolled-up dustproof cloth (475).
9. A foldable safety net assembly installed on a trampoline frame according to claim 7, characterized in that: The arc-shaped brush plate (4776) is provided in multiple sets, and the outer side of the multiple sets of arc-shaped brush plates (4776) is evenly equipped with brush bristles. The top and bottom of the rotating shaft (4771) are rotatably connected to the device port (472) through bearings.
Citation Information
Patent Citations
Trampoline with foldable protective guardrails
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