CN114870320A - Bouncing type device with U-shaped elastic rod - Google Patents

Abstract

A multifunctional device with U-shaped elastic rods, comprising a frame, a plurality of elastic rods, a cushion and a protective net; the bottoms of the plurality of elastic rods are mounted on the frame, and the tops of the elastic rods Connected to the perimeter or the bottom of the cushion, so that the cushion is erected on the frame; the bottom of the protective net is installed on or near the periphery of the cushion, and is supported upward around the periphery of the cushion. A closed space or a semi-closed space with an open top is formed; the bending rigidity of the elastic rod is 200-10000 N/m; the elastic rod is an arc-shaped elastic rod with a bending arc of 3-50°. The multifunctional device of the present invention provides safety controls for activities such as crawling, sitting, lying down, jumping, etc. It integrates multiple functions and has a long service cycle.

Description

Bounce type device with U-shaped elastic rod

technical field

The present invention relates to the technical field of daily necessities, in particular to a bouncing type device, in particular to a bouncing type multifunctional device with a U-shaped elastic rod.

Background technique

Common bouncing devices on the market, such as a trampoline, have a conventional structure in which the jumping pad is erected on the frame through springs or elastic rods. In order to maintain the good elasticity of the trampoline, the elastic rod must usually have a certain bending stiffness. If the bending stiffness of the elastic rod is too high, when the player jumps on the mat, it needs a large impact force to pull the elastic rod and store the elastic potential energy, resulting in poor elasticity of the trampoline. If the bending stiffness of the elastic rod is too low, it is easy to cause the cushion of the trampoline to be too loose and not rebound well, resulting in poor elasticity of the trampoline. In addition, how to install and connect the elastic rod with the trampoline frame and cushion is the core problem of trampoline. In the existing trampoline structure, the elastic rod is usually set as a straight rod, and the top of the elastic rod is installed and connected to the periphery of the cushion through a fixed connection structure. For example, Chinese utility model patent CN1277592C discloses a soft-sided trampoline, comprising a flexible cushion (1) supported in a bottom frame (3) by a plurality of elastic flexible rods (2). Each rod (2) has an enlarged upper end (12). A plurality of joints (6) are joined to the pad (1) around the circumference of the pad, each joint (6) having a socket cavity (10) which receives the enlarged upper end (12) of a flexible rod, Thereby the upper end of the flexible rod is pivotally connected to the periphery of the cushion. When installing a trampoline of this type of structure, the bending rigidity of the elastic rod must be overcome to fix the joint (6) in the cavity of the socket, which requires enormous effort and is very difficult to install. Moreover, the joint is easy to fall off from the cavity of the socket, which is easy to cause a safety accident.

Therefore, there is an urgent need to develop new solutions to solve the problem of difficulty in the installation and connection of elastic rods, cushions, and trampoline frames in existing bouncing devices.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the present invention provides a bouncing device with a U-shaped elastic rod, which is suitable for providing support and protection in activities such as crawling, sitting, lying down and jumping. The U-shaped elastic rod solves the technical problems of the prior art, such as laborious and difficult installation of the elastic rod, the cushion and the frame, and potential safety hazards.

The technical scheme of the present invention is as follows: a multifunctional device with U-shaped elastic rods, comprising a frame, a plurality of U-shaped elastic rods, and a cushion; the bottoms of the plurality of U-shaped elastic rods are mounted on the frame, and the The top of the U-shaped elastic rod is connected to the periphery or the bottom of the cushion, so that the cushion is erected on the frame; the U-shaped elastic rod is composed of at least two single arc-shaped elastic rods side by side, which A single U-shaped unit whose upper end is integrally connected by a connecting rod or an arc-shaped elastic rod assembly in which at least two U-shaped units are repeatedly arranged; the arc-shaped elastic rod has a bending arc of 3-50°.

In a single U-shaped unit, the free ends of the adjacent arc-shaped elastic rods are opened in a figure-eight shape; among the arc-shaped elastic rod assemblies in which at least two U-shaped units are repeatedly arranged, the outermost The free ends of the two arc-shaped elastic rods are opened outward.

The bending rigidity of the arc-shaped elastic rod is 200-10000N/m; the rod diameter of the arc-shaped elastic rod is 0.3-5cm.

All or at least a part of the orthographic projection of the elastic rod falls outside the frame.

The elastic rod is made of spring steel, aviation aluminum or aluminum alloy; the elastic rod has a relatively hard core and a relatively soft outer wrapped around the core, the core and the outer The Rockwell hardness (HRC) differs by 0.1-2.5°, and the grain size of the core portion is larger than that of the outer portion.

The mat includes several warp threads and several weft threads interlaced, and several of the warp threads are parallel to each other, and several of the weft threads are parallel to each other; the warp threads and the weft threads are arranged to intersect with the periphery of the mat at an acute angle.

The warp threads and the weft threads are respectively parallel to the diagonal lines of the mat.

The mat also includes a plurality of parallel first auxiliary lines; the first auxiliary lines and the warp lines and the weft lines are staggered at an acute angle.

The mat also includes a plurality of parallel second auxiliary lines, the second auxiliary lines and the warp lines and the weft lines are arranged at an acute angle at an acute angle; the first auxiliary lines and the second auxiliary lines are respectively parallel to the The long and short sides of the mat.

The periphery of the cushion is detachably connected with the top end of the elastic rod through a connecting piece; the connecting piece has a U-shaped hook part, a mounting part and a flexible belt; The flexible strap passes through the perforation and is fixed at or near the periphery of the cushion; the U-shaped hook portion extends from the mounting portion, and the connecting rod of the U-shaped unit is inserted into the The U-shaped hook portion is matched and locked therewith, so as to detachably connect the elastic rod and the cushion.

The beneficial effects of the present invention are as follows: the multifunctional device with U-shaped elastic rods of the present invention adopts U-shaped elastic rods to cooperate with the connecting pieces with U-shaped hooks around the cushion, and the detachable connection can be realized by locking the hooks. , The bottom of the U-shaped elastic rod is installed into the frame through a plug-in connection, and the installation method is simple, labor-saving and easy to operate. After the installation is completed, the U-shaped elastic rod is not easy to fall off from the frame and the connecting piece, and the safety is high.

Description of drawings:

FIG. 1 is a structural diagram of a multifunctional device with a U-shaped elastic rod according to the present invention.

FIG. 2 is a structural diagram of the elastic rod of the multifunctional device with a U-shaped elastic rod according to the present invention.

FIG. 3 is another structural diagram of the elastic rod of the multifunctional device with U-shaped elastic rod according to the present invention.

FIG. 4 is a top view of a multifunctional device with a U-shaped elastic rod according to the present invention.

FIG. 5 is a structural diagram of the frame and supporting feet of the multifunctional device with U-shaped elastic rods according to the present invention.

FIG. 6 is a structural diagram of the sleeve of the multifunctional device with U-shaped elastic rod according to the present invention.

FIG. 7 is a structural diagram of the first embodiment of the cushion in the multifunctional device with the U-shaped elastic rod according to the present invention.

FIG. 8 is a schematic diagram of the structure of a pad in the prior art.

FIG. 9 is a schematic diagram of the torque principle of the cushion according to the present invention.

FIG. 10 is a schematic diagram of the principle of the cushion according to the present invention.

FIG. 11 is a schematic structural diagram of another embodiment of the cushion of the present invention.

FIG. 12 is a schematic structural diagram of yet another embodiment of the cushion of the present invention.

FIG. 13 is a schematic structural diagram of yet another embodiment of the cushion of the present invention.

FIG. 14 is a schematic structural diagram of yet another embodiment of the cushion of the present invention.

FIG. 15 is a schematic structural diagram of yet another embodiment of the cushion of the present invention.

FIG. 16 is a schematic structural diagram of yet another embodiment of the cushion of the present invention.

FIG. 17 is a schematic structural diagram of yet another embodiment of the cushion of the present invention.

FIG. 18 is a side view of a multifunctional device with a U-shaped elastic rod according to the present invention.

FIG. 19 is a structural diagram of another angle of the multifunctional device with U-shaped elastic rod according to the present invention.

Fig. 20 is an enlarged view of Fig. 19A.

Detailed ways

In order to make the purpose, technical solutions and technical effects of the present invention clearer, the present invention will be further described below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Referring to FIG. 1 , the present invention provides a multifunctional device with U-shaped elastic rods, including a frame 100 , a plurality of U-shaped elastic rods 200 and a cushion 300 . The bottoms of the plurality of U-shaped elastic rods 200 are mounted on the frame 100 , and the tops of the U-shaped elastic rods 200 are connected to the periphery or the bottom of the cushion 300 , so that the cushion 300 is erected between the frame 100 . superior.

In the multi-function device, the frame 100 is for the installation of the elastic rod 200 and is integrated into a whole. The U-shaped elastic rod 200 sets the cushion 300 on the frame 100, converts the impact force on the cushion 300 when the user jumps on the cushion 300 into elastic potential energy, and then releases it instantly, thereby Realize the user's bouncing; the mat 300 is used to support the user's bouncing, sitting, lying down, or infant crawling, learning to walk, and the like.

Preferably, the multifunctional device also has a protective net, the bottom of the protective net 400 is installed on or near the periphery of the cushion 300, and is supported upward around the periphery of the cushion 300 to form a closed space or top. Open semi-enclosed space. The protective net 400 is used to protect the user and prevent the user from falling off the mat 300 when the user performs actions such as bouncing, sitting, lying down, or crawling, toddler, and the like on the mat 300 . The multifunctional device can be used for daily activities, such as lying down, sitting, playing, crawling, etc., on the multifunctional device from a few months after birth. The cushion 300 is lifted off the ground due to the erection of the elastic rod 200, thereby providing a relatively clean space for movement. Because the mat 300 is a grid-like structure woven with the following warp threads and weft threads, it is extremely convenient to clean even if infants and young children drown on it. The range of movement of the infant limited by the protective net 400 not only protects the infant from falling off the mat 300, but also facilitates the guardian to observe the condition of the infant at any time. When a baby grows into a young child, it is naturally fond of jumping. Due to the elasticity of the cushion 300 and the protection of the protective net 400, even if the young child falls on the cushion 300, it will not hurt the body or cause pain. Teenagers or adults can also jump for fun and fitness on the multifunctional device.

The elastic rod 200 is made of elastic material and has a certain elasticity. When the user jumps on the mat 300, the mat 300 is pressed down by force, pulling the elastic rod 200, the elastic rod 200 is bent, stores elastic potential energy, and then recovers instantly, so that the user bounces up. The bending rigidity of the elastic rod 200 is 200-10000 N/m. Among them, infants or children have smaller weight and less strength. Therefore, the bending resistance of the elastic rod 200 should not be too large, otherwise, when jumping on the cushion 300 , the cushion 300 cannot pull the elastic rod 200 and cannot store elastic potential energy. The bending resistance of the elastic rod 200 should not be too small, otherwise, the elastic rod 200 is very easy to bend, and the cushion cannot be stretched. sunken. When the user is an infant or a child, the suggested bending rigidity of the elastic rod 200 is preferably 200-2000 N/m. As the age or weight of the child increases, the bending rigidity of the elastic rod 200 used should gradually increase .

1 and 2, the U-shaped elastic rod 200 has a certain bending arc of 3-50°, preferably 5-10°. To this end, the U-shaped elastic rod 200 must have an arc-shaped elastic rod 210 . The inner arc of the arc-shaped elastic rod faces the direction of the cushion. Compared with the straight rod, the arc-shaped elastic rod is easier to bend further when being stressed, and stores elastic potential energy.

The rod diameter of the arc-shaped elastic rod 210 is generally 0.3-5 cm. The thicker the rod diameter of the arc-shaped elastic rod 210 is, the more difficult it is to bend. The rod diameter is too small and the supporting force is weak, which is not conducive to tensioning the cushion and supporting infants and children. When the user is an infant or child, the suggested bending stiffness of the elastic rod is preferably 0.5-2cm,

2 and 3, preferably, the U-shaped elastic rod 200 is formed by at least two single arc-shaped elastic rods 210 side by side, and the upper ends thereof are integrally connected by a connecting rod 220 to form a single U-shaped unit or Arc-shaped elastic rod assembly 200' in which at least two U-shaped units are repeatedly arranged. The arrangement of the arc-shaped elastic rod assembly 200' can simplify the installation of the U-shaped elastic rod and the frame 100 below, which is beneficial to the installation and connection of the cushion 300 through the connecting member 500 described below. The connection between the arc-shaped elastic rod 210 and the connecting rod 220 is preferably an arc-shaped angle.

Preferably, in a single U-shaped unit, the free ends of the adjacent arc-shaped elastic rods are opened in an "eight" shape, and in the repeated arrangement of the U-shaped units, the outermost free ends of the arc-shaped elastic rods The opening in the shape of an "eight" is beneficial for the arc-shaped elastic rod assembly 200 ′ to be stably installed in the frame 100 .

Referring to FIGS. 1 and 4 , preferably, the bottom of the U-shaped elastic rod 200 is mounted on the frame 100 , and the orthographic projection of the elastic rod 200 preferably falls at least partially or entirely in the area defined by the frame 100 outside. Specifically, the elastic rod 100 spreads outward relative to the frame 100 in a direction away from the cushion 300 , so that the cushion 300 having a larger area than the area defined by the frame 100 can be installed, and the increase in the Activity space in the installation. It should be understood that when the area of the cushion 300 is smaller than the area defined by the frame 100, the elastic rod 300 can also be extended inward relative to the frame 100, so that the orthographic projection of the elastic rod 200 is at least a part of falls within the area defined by the frame 100 .

The elastic rod 200 is preferably made of spring steel, aviation aluminum or aluminum alloy. The spring steel or aviation aluminum material is environmentally friendly, not easy to break, and the price is low. Wherein, the elastic rod 200 has a relatively hard core portion and a relatively soft outer portion wrapped around the core portion, and the Rockwell hardness (HRC) difference between the core portion and the outer portion is 0.1-2.5°, The grain size of the core is larger than the grain size of the outer portion. For its preparation method, refer to Chinese patent CN202110356918.X. The elastic rod of this type of structure can be repeatedly bent without breaking, has excellent hardness and yield strength, no deformation, fatigue resistance, safe performance and stable structure.

Preferably, referring to FIG. 5 , the frame 100 is provided with a pair of mounting holes 110a and 110b corresponding to each of the elastic rods, and the paired mounting holes 110a and 110b are located on opposite sides of the frame. so as to facilitate the insertion and installation of the elastic rod 200 . In order to meet the structural requirement that the orthographic projection of the elastic rod 200 falls outside the frame 100 , the paired mounting holes 110 a and 110 b are preferably arranged on the inner side and the outer side of the frame 100 correspondingly. Of course, this setting can also be used in the case where the orthographic projection of the elastic rod 200 falls within the frame 100 .

Preferably, referring to FIG. 2 and FIG. 3 , a sleeve 120 is fixed in the paired mounting holes 110a and 110b, and the U-shaped elastic rod 200 can be inserted into the sleeve 120 to realize the U-shape. For the installation of the elastic rod 200, the installation method is simple and the operation is convenient. Preferably, a rubber tube 240 is further provided in the sleeve 120 . The elastic rod 200 is inserted into the rubber barrel 240. When the U-shaped elastic rod 200 rotates slightly in the sleeve 120, the rubber barrel 240 can prevent the two from producing harsh friction due to friction. achieve mute.

Preferably, referring to FIG. 6 , the inner diameter of the bottom end 121 of the sleeve 120 is set to be smaller than the inner diameter of the main body 122 thereof, and the outer diameter of the main body 122 of the sleeve 120 is larger than the installation of the inner side of the frame. The hole diameter 110a, the outer diameter of the bottom end 121 of the sleeve is slightly smaller than the diameter of the mounting hole 110a on the inner side of the frame, the outer diameter of the arc-shaped elastic rod is the same as the inner diameter of the main body 122. match, and is larger than the inner diameter of the bottom end 121 of the sleeve 120 ; so that the sleeve 120 cannot be dropped from the frame 100 , and the arc-shaped elastic rod cannot be removed from the bottom of the sleeve 120 Pierced through the end.

Preferably, referring to FIG. 1 , the periphery of the cushion 300 and the top end of the U-shaped elastic rod 200 are detachably connected by the following connecting member 500 . The multifunctional device with U-shaped elastic rods of the present invention can be designed to be rectangular, square, circular, elliptical and similar structures in order to fit in different spaces.

Preferably, the frame 100 is a rectangular frame or a square frame, on which the cushion 300 having a shape similar to the frame is arranged. Around the periphery of the cushion 300 is preferably provided with a wrapping edge 310 wrapping the periphery of the cushion 300 . The periphery of the cushion 300 and the top end of the elastic rod 200 are detachably connected by the following connecting member 500 . When the edge 310 is provided on the periphery of the cushion 300 , the connecting member 500 is preferably installed on the lower bottom surface of the edge 310 .

Referring to FIG. 7 , the mat 300 includes a number of warp threads 1 and a number of weft threads 2 that are interlaced. A number of the warp threads 1 are parallel to each other, and a number of the weft threads 2 are parallel to each other. The warp 1 and the weft 2 are arranged to intersect with the periphery A of the cushion 300 at an acute angle.

Compared with the warp threads and the weft threads that are respectively arranged in parallel with the periphery of the cushion 300 as shown in FIG. 8 , the warp threads 1 and the weft threads 2 are arranged to intersect with the periphery of the cushion 300 at an acute angle. The multifunctional device has better elasticity, and its principle is explained as follows:

Referring to FIG. 9 , when the player jumps on the mat 300, it is assumed that the foot falls on any landing point C of the mat 300, the warp 1 and the weft 2 passing through the landing point C are pressed down, and the two ends of the The elastic rod 200 at the periphery of the cushion generates a tensile force, and other warp and weft threads interlaced with the warp thread 1 and the weft thread 2 passing through the drop point C are affected by it, and are also pressed down, and the two ends thereof are also affected by the cushion 300. The elastic rods 200 at the perimeter generate tension. These pulling forces are combined, so that the elastic rod 200 is elastically deformed, thereby storing elastic potential energy.

The elastic deformation of the elastic rod 200 depends on the moment received, and the moment formula is F*L, where F represents the force and L represents the force arm. The magnitude of the moment, on the one hand, is determined by the pressure of the player on the cushion at the landing point, which is converted into a pulling force on the elastic rod through the warp 1 and the weft 2, namely F; on the other hand, it depends on The distance between the warp 1 or the weft 2 and the elastic rod 200 passing through the drop point C, that is, L.

In the prior art shown in FIG. 8 , the warp 1 and the weft 2 are parallel to the long and short sides of the mat; in the embodiment shown in FIG. 7 , the warp 1 and the weft 2 are parallel to the The long and short sides of the mat meet at an acute angle. Referring to Fig. 9, taking a rectangular mat as an example, the maximum distance between any landing point C and the periphery of the mat is the distance from the landing point C to the four corners of the rectangular mat, denoted as L1; the vertical distance from the landing point C to the long side of the rectangular mat , denoted as L2; the distance from the drop point C to the short side of the rectangular mat, denoted as L3. Obviously, L1>L2, L1>L3, then theoretically, when the same pressure F is applied to the warp or weft at the drop point C, the moments generated by the warp or weft on the cushion are F*L1, F*L2 and FL3, obviously, F*L1>F*L2, F*L1>F*L3, it can be seen that under the same pressure, the warp 1 and the weft 2 and the mat are arranged at an acute angle than the warp 1. and the weft 2 is arranged in parallel with the long and short sides of the mat, which can exert a larger moment on the elastic rod 200 under the mat 300, which will also be converted into a larger rebound potential energy, thereby The device has better elasticity.

In addition, when the player bounces at any landing point C of the mat, the warp 1 and the weft 2 there will be pressed down to a certain extent by the pressure, and the other warps and other wefts around it will also be pressed down by different degrees. The closer the distance between other warp threads and other weft threads is from the landing point C, the greater the degree of depression is affected by it, and the farther it is, the smaller the degree of depression is due to its influence. Obviously, the greater the pressing range, the greater the pulling force on the elastic rod under the periphery of the cushion, and the smaller the pulling force on the elastic rod under the periphery of the cushion. The warp thread 1 and the weft thread 2 passing through any landing point C can only pull the elastic rod under the periphery of the cushion through its two ends and exert a moment on it. As shown in FIG. 10 , the warp 1 and the weft 2 are respectively parallel to the long side and the short side of the mat 300 , passing through the warp 1 and the weft 2 at any landing point C, to the mat 300 A moment e, f, g, h is applied to the four corners respectively. Also at the drop point C, when the warp 1 and the weft 2 intersect the long side and the short side of the mat at an acute angle, there are two intersection points on one side a, that is, the Two moments g', f' are applied to the side, and a moment e', h' is respectively applied to the other two sides adjacent to the side. Obviously, when F is the same, e'>e, f'>f, and f'+g'>f, h'>g; therefore, the side a is subjected to a larger moment, so that the side The elastic rods under the two adjacent corners are subjected to relatively larger elastic deformation, and store more potential energy, thereby having better elasticity.

Further, in the embodiment shown in FIG. 11 , each warp or weft and the periphery of the cushion 300 form a triangular structure or a similar triangular structure, which is relatively more stable.

Preferably, referring to FIG. 11 , the warp 1 and the weft 2 are parallel to the diagonals 3 a and 3 b of the mat 300 , respectively. When the warp 1 and the weft 2 are respectively arranged in parallel with the diagonal lines of the rectangular mat, when the player bounces at the center point D of the central area of the mat, the warp and the weft there will be compressed by pressure. It is pressed down to a certain extent, and affects the warp and weft threads around it to press down in different degrees. Since the center point D of the central area of the mat and its surrounding warp and weft lines are connected to the four corners of the trampoline or the long and short sides close to the four corners, moments are formed at the four corners of the trampoline, as well as the short and long sides, As a result, the elastic bars at the four corners and under the long and short sides can be elastically deformed, so that the maximum elastic potential energy can be stored, and the central area of the trampoline has the best elasticity.

Preferably, the warp threads 1 and the weft threads 2 are arranged to intersect with the periphery of the cushion at 45°.

In another embodiment of the present invention, referring to FIG. 12 , the mat 300 further includes a plurality of parallel first auxiliary lines 4; the first auxiliary lines 4 and the warp lines 1 and the weft lines 2 are staggered at an acute angle . The first auxiliary line 4 can be arranged parallel to the long side of the cushion 300 or parallel to the short side of the cushion 300 . Through the arrangement of the first auxiliary wire 4, after the cushion is under pressure, the distribution of the tension force on the elastic rod 200 under the cushion is more uniform, which is beneficial to improve the elasticity of the device.

In another embodiment of the present invention, referring to FIG. 13 , the mat 300 further includes a plurality of parallel second auxiliary lines 5 , and the second auxiliary lines 5 and the warp lines 1 and the weft lines 2 are staggered at an acute angle . The first auxiliary line 4 and the second auxiliary line 5 are respectively parallel to the long side and the short side of the cushion 300 . Through the arrangement of the second auxiliary line 5, after the cushion is under pressure, the distribution of the tension force on the cushion is more uniform, which is beneficial to improve the elasticity of the device.

Preferably, as shown in FIGS. 16 and 17 , the warp thread 1 , the weft thread 2 , the first auxiliary thread 4 and the second auxiliary thread 5 intersect at an angle of 45°.

It should be understood that the braided lines of the cushion 300 may further increase auxiliary lines, but this will undoubtedly increase the weight of the cushion, thereby reducing its resilience and increasing the cost.

When the U-shaped elastic rods 200 at the four corners are under tension, the bottom of the U-shaped elastic rods 200 pushes the frame 100 into the device. Preferably, as shown in FIG. 1 and FIG. 5 , the four corners of the square or rectangular frame 100 are preferably arc-shaped corners. Compared with the right angle, the arc angle has better stability, which makes the frame 100 more stable, and can also relatively reduce the pressure of the frame to bend toward the center due to the tensile force. Preferably, at least one short straight pipe 130 connects two straight pipes 120 at the four corners of the square or rectangular frame 100 . This structure can offset the pushing of the U-shaped elastic rod 200 to the frame 100 to a certain extent, so that the frame 100 is more stable.

A plurality of supporting feet 600 are disposed under the frame 100 , and the supporting feet 600 support the frame 100 to be separated from the ground. Preferably, the supporting feet 600 are disposed under the four corners of the square or rectangular frame 100 , or evenly distributed under the four corners of the oval frame 100 , or evenly distributed under the circular frame.

The support foot 600 may be a common support foot structure in the market. Preferably, the support leg 600 includes a U-shaped piece 610 and two plug tubes 620 fixed under the frame, and two free ends 611 of the U-shaped piece are inserted into the two plug tubes 620 . Corresponding threaded holes 621 and 622 are respectively provided on the plug-in tube 620 and the free end 611 of the U-shaped piece, and a locking screw 630 passes through the threaded holes 621 and 622 to connect the plug-in tube 620 and all of them. The U-shaped piece locks the connection. A pad member 640 is provided on the horizontal bar 612 of the U-shaped member 610, the pad member 640 wraps or partially wraps the horizontal bar 612, and a pawl 641 is provided at the bottom thereof to engage the ground. The U-shaped member 610 can be arranged perpendicular to the ground or can also be arranged obliquely at an acute angle to the ground. The setting direction of the plug-in tube 620 should be compatible with the U-shaped member 610 .

Preferably, referring to FIG. 18 , in order to adjust the height of the device, at least two threaded holes 621a and 621b are provided on the plug-in tube 620 . By adjusting the threaded holes 622 and 621a or 621b locked by the locking screw 630, the height of the device can be adjusted. For example, if the locking screw 630 locks the upper threaded hole 621a and the threaded hole 622a, the position of the device is lower, and the locking screw 630 locks the lower threaded hole 621b and the threaded hole 622, and the position of the device is higher.

Preferably, in order to facilitate the moving position of the device, the frame 100 is further provided with a universal wheel 140 . The universal wheel 140 has a commonly used universal wheel structure, and its structure and principle should be well known to those skilled in the art, and the present invention will not be described in detail here.

Referring to FIGS. 19 and 20 , the connection between the elastic rod 200 and the cushion 300 is achieved through a connecting member 500 . In order to adapt to the arc-shaped elastic rod assembly described in this application, the connecting member 500 described in this application preferably has a U-shaped hook portion 510 , a mounting portion 520 and a flexible strap 530 . A through hole 521 is dug in the mounting portion 520 , and the flexible strap 530 passes through the through hole 521 and is fixed on the periphery of the cushion 300 or the bottom surface of the undercover 310 of the cushion. The fixing method is preferably stitching. The U-shaped hook portion 510 extends out from the mounting portion, and the connecting rod 200 is inserted into the U-shaped hook portion to engage with it, so that the arc-shaped elastic rod assembly and the cushion 300 are detachable. connect.

Preferably, a protruding post 511 is provided on the U-shaped hook portion 510, a mesh cable is provided at the edge of the cushion 300, and a flexible pad is arranged between the mesh cable and the edge wrapping, and the protruding post 511 The net cable is hooked so that the hemming covers the connecting member 500 , thereby making the trampoline more beautiful.

The bottom of the cushion 300 and the protective net 400 are preferably connected by a zipper 401 . Specifically, a connecting portion 301 extends from the cushion 300 along the peripheral attachment, and the connecting portion 301 and the bottom of the protective net 400 are respectively installed with one side coupling teeth of the zipper 401 . The zipper has a common zipper structure, which is well known to those skilled in the art, and will not be repeated in this application.

1 , 19 and 20 , the protective net 400 is a mesh structure woven from flexible wires. In order to maintain the shape, even if the infant collides with the protective net, it will not be deformed, so as to protect the infant and prevent it from being deformed. Drop off the mat. For this purpose, the protective net 400 must be taut. The frame 100 is provided with a number of support rods 700 , and the support rods 700 are arranged around the cushion 300 . The top of the protective net 400 is provided with a corresponding number of straps 410 , and each strap 410 is connected to each other. on the support rod 700 , so as to stretch and stretch the protective net 400 .

The protective net 400 is provided with a zipper door 420 . Access to the device is through the zipper door 420 .

The zipper door 420 can be set in various shapes as required, such as a straight line, a slit or a U shape. U-shape is preferred.

Four corners of the frame 100 are respectively fixed with a mounting tube 101 , and the support rod 700 is a large arc-shaped rod, the bottom of which is inserted into the mounting tube 101 for fixing. Preferably, a reinforcing rib is provided between the installation pipe 101 and the frame 100 to strengthen the connection between the installation pipe 101 and the frame 100. Specifically, the installation tube 101 is a flat tube with an oval cross-section. The bottom of the support rod 700 is provided with two opposite flat surfaces 701 and two opposite arc surfaces 702. After being inserted into the flat tube , with which it cannot be rotated.

The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art to which the present invention pertains, without departing from the concept of the present invention, its architectural form can be flexible and changeable, and a series of products can be derived. Just making some simple deductions or substitutions should be regarded as belonging to the scope of patent protection of the present invention determined by the submitted claims.

Claims (10)

1. A multifunctional device with U-shaped elastic rods, characterized in that it includes a frame, a plurality of U-shaped elastic rods, and a cushion; the bottoms of the plurality of U-shaped elastic rods are mounted on the frame, and the U-shaped elastic rods are The top of the U-shaped elastic rod is connected to the periphery or the bottom of the cushion, so that the cushion is erected on the frame; the U-shaped elastic rod is composed of at least two single arc-shaped elastic rods side by side, the upper end of which A single U-shaped unit or an arc-shaped elastic rod assembly in which at least two U-shaped units are repeatedly arranged through a connecting rod integrally connected; the arc-shaped elastic rod has a bending arc of 3-50°; the elastic rod All or at least part of the orthographic projection falls outside the frame. 2. The multifunctional device with U-shaped elastic rods according to claim 1, wherein, in a single U-shaped unit, the free ends of the adjacent arc-shaped elastic rods are opened in a figure-eight shape; at least In the arc-shaped elastic rod assembly in which the two U-shaped units are repeatedly arranged, the free ends of the two outermost arc-shaped elastic rods are opened outward. 3 . The multifunctional device with a U-shaped elastic rod according to claim 1 , wherein the bending rigidity of the arc-shaped elastic rod is 200-10000 N/m; the rod diameter of the arc-shaped elastic rod is 3 . 0.3～5cm. 4 . The multifunctional device with a U-shaped elastic rod according to claim 1 , wherein the material of the elastic rod is spring steel, aviation aluminum or aluminum alloy. 5 . 5. The multifunctional device with a U-shaped elastic rod according to any one of claims 1-3, wherein the elastic rod has a relatively hard core and a relatively hard core wrapped outside the core. For the soft outer portion, the difference in Rockwell hardness (HRC) of the core portion and the outer portion is 0.1-2.5°, and the grain size of the core portion is larger than that of the outer portion. 6 . The multifunctional device with U-shaped elastic rods according to claim 1 , wherein the mat comprises a plurality of warp threads and a plurality of weft threads interlaced with each other, a plurality of the warp threads are parallel to each other, and a plurality of the weft threads are parallel to each other. 7 . ; The warp and the weft are arranged to intersect with the periphery of the mat at an acute angle. 7 . The multifunctional device with U-shaped elastic rods according to claim 5 , wherein the warp and weft lines are respectively parallel to the diagonal lines of the cushion. 8 . 8 . The multifunctional device with U-shaped elastic rod according to claim 6 , wherein the cushion further comprises a plurality of parallel first auxiliary lines; the first auxiliary lines are connected with the warp lines and the Wefts are staggered at acute angles. 9 . The multifunctional device with U-shaped elastic rods according to claim 8 , wherein the cushion further comprises a plurality of parallel second auxiliary lines, the second auxiliary lines are connected with the warp lines and the said warp lines. 10 . The weft lines are staggered at an acute angle; the first auxiliary line and the second auxiliary line are respectively parallel to the long side and the short side of the mat. 10. The multifunctional device with a U-shaped elastic rod according to claim 1, wherein the periphery of the cushion and the top end of the elastic rod are detachably connected by a connecting piece; the connecting piece has a A U-shaped hook portion, a mounting portion and a flexible strap; a perforation is dug on the mounting portion, and the flexible strap passes through the perforation and is fixed on the periphery of the cushion or near the periphery of the cushion; the The U-shaped hook portion extends out from the mounting portion, and the connecting rod of the U-shaped unit is inserted into the U-shaped hook portion to engage and lock with the U-shaped hook portion, so as to detachably connect the elastic rod and the cushion.

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