Front wheel suspension mechanism for a child's pushchair

Abstract

The embodiment of the present application discloses a kind of children's stroller front wheel shock-absorbing mechanism, for connecting between the frame and front wheel of children's stroller to buffer shock-absorbing children's stroller, frame includes front leg and the connecting shaft of the lower end of front leg, children's stroller front wheel shock-absorbing mechanism includes: shock-absorbing seat, shock-absorbing seat vertically has the connecting hole for connecting connecting shaft, and shock-absorbing seat is provided with the vertical long hole passing through the left and right side walls of shock-absorbing seat;Wheel shaft, wheel shaft is inserted into vertical long hole and left and right ends stretch out shock-absorbing seat to connect front wheel;Elastic buffer, elastic buffer is clamped between the upper side of wheel shaft and the inner top wall of shock-absorbing seat, to provide shock-absorbing buffer between the vertical impact of shock-absorbing seat and connecting shaft.The elastic buffer of the children's stroller of the embodiment of the present application can absorb and store impact energy, convert instantaneous impact into long-time reciprocating vibration, to reduce the vibration of front wheel conducted to frame, to improve the ride comfort and safety of children's stroller.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of baby products, in particular to a front wheel shock absorption mechanism of a baby stroller. BACKGROUND

[0002] In the related art, a baby stroller is a tool cart designed to facilitate outdoor activities for babies, and the frame of the baby stroller is usually directly connected with the wheels. When the baby stroller is pushed on a bumpy road, it will have a large amplitude of bumping, which may cause harm to the baby sitting in the baby stroller. SUMMARY

[0003] The present application provides a front wheel shock absorption mechanism of a baby stroller, which can solve the technical problems in the related art.

[0004] The present application provides a front wheel shock absorption mechanism of a baby stroller, which is used for connecting a frame and a front wheel of the baby stroller to provide shock absorption and buffering for the baby stroller. The frame includes a front leg and a connecting shaft arranged at the lower end of the front leg. The front wheel shock absorption mechanism includes a shock absorption seat, a wheel shaft, and an elastic buffer. The shock absorption seat is vertically provided with a connecting hole for connecting the connecting shaft, and is provided with a vertical long hole penetrating through the left and right side walls of the shock absorption seat. The wheel shaft is inserted into the vertical long hole and extends out of the shock absorption seat at the left and right ends to connect the front wheel. The elastic buffer is arranged between the upper side of the wheel shaft and the inner top wall of the shock absorption seat to provide shock absorption and buffering for the vertical impact between the shock absorption seat and the connecting shaft.

[0005] Based on the front wheel shock absorption mechanism of the baby stroller, the wheel shaft is connected with the elastic buffer. When the impact of the front wheel is transmitted to the wheel shaft, the elastic buffer can absorb and store the impact energy, convert the instantaneous impact into long-term reciprocating vibration, so as to reduce the vibration transmitted to the frame by the front wheel, improve the riding comfort and safety of the baby stroller. At the same time, the smaller the vibration on the frame when pushing, the more stable the baby stroller, the easier to control, and the better the user's pushing experience. The vertical long hole can guide the wheel shaft to move up and down more stably.

[0006] In some exemplary embodiments, the front wheel shock absorption mechanism of the baby stroller further includes a connecting block, the connecting block is sleeved on the part of the wheel shaft located in the shock absorption seat, the wheel shaft can rotate relative to the connecting block, and the elastic buffer is arranged between the connecting block and the inner top wall of the shock absorption seat.

[0007] Based on the above-mentioned embodiments, the wheel shaft is connected with the elastic buffer through the connecting block, and the wheel shaft is arranged to rotate in the connecting block, so that the wheel shaft can not only rotate freely with the front wheel, but also move up and down to provide buffering and shock absorption for the front wheel.

[0008] In some example embodiments, the connecting block protrudes upward to form a first limiting portion for limiting the elastic buffer, and the inner top wall of the shock-absorbing seat protrudes downward to form a second limiting portion, and the elastic buffer is sleeved on the first limiting portion and the second limiting portion.

[0009] Based on the above-mentioned embodiments, the first limiting portion can increase the connection reliability of the elastic buffer and the connecting block, and reduce the probability of the elastic buffer falling off. The second limiting portion can increase the connection reliability of the elastic buffer and the shock-absorbing seat, and reduce the probability of the elastic buffer falling off.

[0010] In some example embodiments, the shock-absorbing mechanism for the front wheels of the stroller further comprises a first magnetic member arranged on the shock-absorbing seat, and a second magnetic member arranged on the connecting block, and at least one of the first magnetic member and the second magnetic member can change the magnetic pole direction to change the acting force between the first magnetic member and the second magnetic member.

[0011] Based on the above-mentioned embodiments, by changing the acting force between the first magnetic member and the second magnetic member, the preset force at both ends of the elastic buffer can be adjusted, so that the initial state of the elastic buffer can be compressed, taut or free to stretch, so that the elastic buffer can be adjusted to adapt to a larger range of load weight.

[0012] In some example embodiments, the vertical long hole has a vertical distance from the top end to the inner top wall of the shock-absorbing seat, which is greater than or equal to the length of the elastic buffer when it is compressed to the limit.

[0013] Based on the above-mentioned embodiments, even if the wheel shaft is located at the top end of the vertical long hole, the elastic buffer will not be compressed to the limit, thereby effectively protecting the elastic buffer.

[0014] In some example embodiments, the shock-absorbing mechanism for the front wheels of the stroller further comprises a shaft sleeve, which is sleeved on the wheel shaft and located between the front wheels and the shock-absorbing seat.

[0015] Based on the above-mentioned embodiments, the shaft sleeve makes the two front wheels always located at both ends of the wheel shaft, and the wheel track between the two front wheels is kept maximum, thereby improving the stability when pushing.

[0016] In some example embodiments, the child stroller front wheel shock absorption structure further comprises a limiting member slidably arranged in the shock absorption seat, and the limiting member can slide out of the shock absorption seat and be inserted into a limiting groove at the lower end of the front leg to limit the rotation of the child stroller front wheel shock absorption mechanism and the front wheel relative to the front leg; a pedal member rotatably connected to the shock absorption seat, the pedal member and the limiting member are in transmission connection to drive the limiting member to slide out of the shock absorption seat or slide back into the shock absorption seat, the pedal member is provided with a limiting protrusion on the upper surface, and the surface of the limiting protrusion is an arc surface; when the limiting member slides to the position where the limiting protrusion is matched with the locking groove, the limiting member slides out of the shock absorption seat and is inserted into the limiting groove; and when the limiting member slides to the position where the limiting protrusion is matched with the release groove, the limiting member slides back into the shock absorption seat.

[0017] Based on the above-mentioned embodiments, by switching the position of the pedal member, the shock absorption seat can be freely rotated or locked relative to the front leg. At the same time, the limiting protrusion can be engaged with the locking groove or the release groove, so that the child stroller front wheel shock absorption mechanism can be kept in a free rotation state or a locked state without being subjected to external force.

[0018] In some example embodiments, the child stroller front wheel shock absorption mechanism further comprises a limiting return spring arranged between the limiting member and the shock absorption seat, and the limiting return spring applies force to the pedal member, so that the limiting protrusion of the pedal member always has a tendency to slide into the release groove.

[0019] Based on the above-mentioned embodiments, since the user is easier to apply force when stepping on the pedal member than when lifting the pedal member, the limiting return spring makes it easier for the user to lift the pedal member.

[0020] In some example embodiments, the upper surface of the pedal member is provided with anti-skid protrusions.

[0021] Based on the above-mentioned embodiments, the anti-skid protrusions can increase the friction coefficient, and the user can increase the friction force between the foot and the pedal member when stepping on the pedal member, so as to avoid missing the step.

[0022] In some example embodiments, one end of the connecting shaft inserted into the connecting hole has an inner recessed clamping portion; the child stroller front wheel shock absorption mechanism further comprises: a quick release member, which is transversely and slidingly arranged in the shock absorption seat, the quick release member is provided with a first through hole and a second through hole in communication with the first through hole, the first through hole is used for clamping with the clamping portion of the connecting shaft, and the second through hole is used for the connecting shaft to pass through; a quick release return spring, two ends of the quick release return spring are connected with the quick release member and the inner side wall of the shock absorption seat respectively, and the quick release return spring exerts force on the quick release member so that the first through hole and the clamping portion of the connecting shaft are kept clamped.

[0023] Based on the above-mentioned embodiments, by pressing the quick release member, the first through hole or the second through hole of the quick release member can be switched to cooperate with the connecting shaft, so that the connecting shaft can be quickly disassembled or locked from the shock absorption seat.

[0024] In some example embodiments, the child stroller front wheel shock absorption mechanism further comprises an auxiliary limiting block, which is arranged in the shock absorption seat and surrounds the quick release return spring.

[0025] Based on the above-mentioned embodiments, the auxiliary limiting block can ensure that the quick release return spring deforms along the axial direction in the compression process, so as to avoid damage or falling caused by the bending of the quick release return spring in the radial direction.

[0026] In some example embodiments, the quick release member protrudes in the horizontal direction to form a third limiting portion, and the quick release return spring is sleeved on the third limiting portion.

[0027] Based on the above-mentioned embodiments, the third limiting portion can increase the connection reliability of the quick release return spring and the quick release member, and reduce the probability of falling of the quick release return spring. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 FIG. 1 is a structural schematic view of a child stroller front wheel shock absorption mechanism in an embodiment of the present application;

[0030] Figure 2 FIG. 2 is a structural schematic view of a child stroller front wheel shock absorption mechanism and a frame in an embodiment of the present application;

[0031] Figure 3 FIG. 3 is a structural schematic view of a child stroller front wheel shock absorption mechanism in another embodiment of the present application;

[0032] Figure 4 A disassembled schematic view of a front wheel shock-absorbing mechanism of a child stroller according to an embodiment of the present application;

[0033] Figure 5 A sectional view of a front wheel shock-absorbing mechanism and a partial frame of a child stroller according to another embodiment of the present application;

[0034] Figure 6 An enlarged schematic view of a connecting hole according to an embodiment of the present application;

[0035] Figure 7 An enlarged schematic view of a mounting hole according to an embodiment of the present application;

[0036] Figure 8 A structural schematic view of a front wheel shock-absorbing mechanism of a child stroller according to still another embodiment of the present application;

[0037] Figure 9 A disassembled schematic view of a connecting shaft and a quick release according to an embodiment of the present application.

[0038] The reference signs are explained as follows: 100, a front wheel shock-absorbing mechanism of a child stroller; 110, a shock-absorbing seat; 111, a receiving cavity; 112, a connecting hole; 1121, a first long slot; 113, a locking groove; 114, a release groove; 115, a vertical long hole; 120, an elastic buffer; 130, a connecting block; 131, a mounting hole; 132, a first limiting portion; 1311, a second long slot; 140, a first magnetic member; 150, a second magnetic member; 160, a limiting return spring; 170, an axle; 180, a limiting member; 190, a treading member; 191, a limiting protrusion; 192, an anti-skid ridge; 210, a quick release; 211, a first through hole; 212, a second through hole; 213, a third limiting portion; 220, a quick release return spring; 230, an auxiliary limiting block; 240, a front wheel; 250, a shaft sleeve; 300, a child stroller; 310, a frame; 3111, a limiting groove; 312, a connecting shaft; 3121, a clamping portion; 313, a front leg. DETAILED DESCRIPTION

[0039] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely used to explain the present application and should not be used to limit the present application.

[0040] As Figures 1-4As shown, the embodiment of the present application provides a front wheel shock absorption mechanism 100 connected between the front wheel 240 and the frame 310 for relieving the impact transmitted by the front wheel 240 to the frame 310. The frame 310 comprises a front leg 313 and a connecting shaft 312 arranged at the lower end of the front leg 313. The front wheel shock absorption mechanism 100 comprises a shock absorption seat 110, a wheel shaft 170 and an elastic buffer 120.

[0041] The shock absorption seat 110 is provided with a receiving cavity 111 in which the elastic buffer 120 and the connecting block 130 are located. The receiving cavity 111 can protect the elastic buffer 120 and the connecting block 130 and make the structure more compact, thereby reducing the volume of the front wheel shock absorption mechanism 100. The shock absorption seat 110 is vertically provided with a connecting hole 112 for connecting the connecting shaft 312, and the connecting shaft 312 is inserted into the connecting hole 112 to make the frame 310 and the shock absorption seat 110 rotationally connected. The left and right side walls of the shock absorption seat 110 are also vertically provided with a vertical long hole 115 which is in communication with the receiving cavity 111.

[0042] The wheel shaft 170 is slidably arranged in the vertical long hole 115, and the left and right ends of the wheel shaft 170 are inserted into the vertical long hole 115 and protrude out of the shock absorption seat 110 to connect the front wheel 240.

[0043] The elastic buffer 120 is used for storing impact energy and converting instantaneous impact into long-term reciprocating vibration to relieve the vibration transmitted by the front wheel 240 to the shock absorption seat 110. The elastic buffer 120 is clamped between the upper side of the wheel shaft 170 and the inner top wall of the shock absorption seat 110 to provide shock absorption and buffering for the vertical impact between the shock absorption seat 110 and the connecting shaft 312.

[0044] As described above, since the wheel shaft 170 is connected with the elastic buffer 120, when the impact of the front wheel 240 is transmitted to the wheel shaft 170, the elastic buffer 120 can absorb and store impact energy and convert instantaneous impact into long-term reciprocating vibration to reduce the vibration transmitted by the front wheel 240 to the frame 310, thereby improving the riding comfort and safety of the child stroller 300. Meanwhile, the smaller the vibration on the frame 310 during pushing, the more stable the child stroller 300, the easier to control, and the better the user's pushing experience. The vertical long hole 115 can guide the wheel shaft 170 to make the wheel shaft 170 more stable when sliding up and down.

[0045] As shown in the drawings, Figures 4-5As shown, in some embodiments, the child stroller front wheel shock absorption mechanism 100 further comprises a connecting block 130, which is sleeved on the part of the wheel shaft 170 located in the shock absorption seat 110, the wheel shaft 170 can rotate relative to the connecting block 130, and the elastic buffer 120 is clamped between the connecting block 130 and the inner top wall of the shock absorption seat 110. By connecting the connecting block 130 and the elastic buffer 120, the wheel shaft 170 is rotatably arranged on the connecting block 130, so that the wheel shaft 170 can not only drive the front wheel 240 to rotate freely, but also can move up and down to provide buffering and shock absorption for the front wheel 240.

[0046] As shown in Figure 5 In some embodiments, the connecting block 130 protrudes upward to form a first limiting portion 132 for limiting the elastic buffer 120, and the inner top wall of the shock absorption seat 110 protrudes downward to form a second limiting portion (not shown in the figure), and the elastic buffer 120 is sleeved on the first limiting portion 132 and the second limiting portion. The elastic buffer 120 can be a spring, and the protruding lengths of the first limiting portion 132 and the second limiting portion can be the same as the length of the spring pitch. The first limiting portion 132 and the second limiting portion are respectively sleeved with both ends of the elastic buffer 120, which can increase the reliability of the connection between the elastic buffer 120 and the first limiting portion 132 and the second limiting portion.

[0047] Continuing to refer to Figures 4-5 , the child stroller front wheel shock absorption mechanism 100 comprises a first magnetic member 140 and a second magnetic member 150. The first magnetic member 140 is arranged on the shock absorption seat 110, and the second magnetic member 150 is arranged on the connecting block 130. At least one of the first magnetic member 140 and the second magnetic member 150 can change the magnetic pole direction, so that the first magnetic member 140 and the second magnetic member 150 repel each other, attract each other, or have no force.

[0048] In actual use, when the baby is heavy, the force between the first magnetic member 140 and the second magnetic member 150 can be adjusted to repel each other. The repulsive force between the first magnetic member 140 and the second magnetic member 150 can offset part of the pressure of the baby on the elastic buffer 120, so as to avoid the elastic buffer 120 being compressed too much. When the baby is light or the child stroller 300 is empty, the force between the first magnetic member 140 and the second magnetic member 150 can be adjusted to attract each other. The attractive force between the first magnetic member 140 and the second magnetic member 150 can make the elastic buffer 120 be moderately compressed, so as to avoid the elastic buffer 120 from shaking too much and producing a bouncing feeling. When the baby is of a suitable weight, the force between the first magnetic member 140 and the second magnetic member 150 can be adjusted to zero.

[0049] In summary, the front wheel shock absorption mechanism 100 of the stroller in this embodiment can adjust the degree of compression of the elastic buffer 120, so that the elastic buffer 120 maintains a better working state, thereby making the stroller 300 ride more smoothly and with higher comfort. Secondly, the front wheel shock absorption mechanism 100 of the stroller in this embodiment can adapt to infants of different weights, thus covering infants of multiple ages and increasing the applicability of the stroller 300.

[0050] like Figure 6 As shown, in some embodiments, the wall of the connecting hole 112 is provided with at least one first elongated groove 1121 extending axially along the connecting shaft 311. By providing the first elongated groove 1121, the contact area between the connecting hole 112 and the connecting shaft 312 can be reduced, thereby reducing friction and making the rotation of the connecting shaft 312 more flexible. At the same time, the first elongated groove 1121 facilitates the addition of lubricating oil and can also store a small amount of lubricating oil, which is beneficial for the formation of an oil film layer between the connecting shaft 312 and the connecting hole 112 when rotating.

[0051] like Figure 7 As shown, the connecting block 130 has a mounting hole 131, and the axle 170 rotatably passes through the mounting hole 131. At least one second elongated groove 1311 extending axially along the axle 170 is formed on the wall of the mounting hole 131. By providing the second elongated groove 1311, the contact area between the mounting hole 131 and the axle 170 can be reduced, thereby reducing friction and making the rotation of the axle 170 more flexible. At the same time, the second elongated groove 1311 facilitates the addition of lubricating oil and can also store a small amount of lubricating oil, which is beneficial for the formation of an oil film layer between the axle 170 and the mounting hole 131 during rotation.

[0052] In some embodiments, the distance between the top end of the vertical elongated hole 115 and the top end of the receiving cavity 111 is greater than or equal to the length of the elastic buffer 120 under extreme compression. Even when the axle 170 is located at the top end of the vertical elongated hole 115, the elastic buffer 120 will not be compressed to its limit, thereby effectively protecting the elastic buffer 120. Preferably, the distance between the top end of the vertical elongated hole 115 and the top end of the receiving cavity 111 is approximately equal to the length of the elastic buffer 120 under extreme compression, and the ratio is preferably in the range of 0.95 to 1.05.

[0053] like Figure 2As shown in some embodiments, the child stroller front wheel shock absorption mechanism 100 further comprises a shaft sleeve 250, the front wheels 240 are arranged at both ends of the wheel shaft 170, the shaft sleeve 250 is sleeved on the wheel shaft 170, and the shaft sleeve 170 is located between the front wheels 240 and the shock absorption seat 110. The shaft sleeve 250 makes the two front wheels 240 always located at both ends of the wheel shaft 170, the wheel track between the two front wheels 240 is kept maximum, and the stability during pushing is improved.

[0054] As shown in some embodiments, Figure 2 , Figure 5 and Figure 8 , the child stroller front wheel shock absorption mechanism 100 comprises a limiting piece 180 and a pedal piece 190. The surface of the shock absorption seat 110 is provided with a locking groove 113 and a release groove 114, the limiting piece 180 is slidingly arranged in the shock absorption seat 110, and the pedal piece 190 is rotationally arranged in the shock absorption seat 110. The pedal piece 190 is in transmission connection with the limiting piece 180 to drive the limiting piece 180 to slide, and the pedal piece 190 is provided with a limiting protrusion 191. The lower end of the front leg 313 is provided with a limiting groove 3111, and the limiting piece 180 is inserted and matched with the limiting groove 3111.

[0055] When the limiting piece 180 slides to the position where the limiting protrusion 191 is matched with the locking groove 113, the limiting piece 180 partially extends out of the shock absorption seat 110 and is inserted and matched with the limiting groove 3111, so that the child stroller front wheel shock absorption mechanism 100 cannot freely rotate relative to the frame 310, and the moving direction of the child stroller 300 is locked. When the limiting piece 180 slides to the position where the limiting protrusion 191 is matched with the release groove 3111, the limiting piece 180 retreats into the shock absorption seat 110, so that the child stroller front wheel shock absorption mechanism 100 can freely rotate relative to the frame 310, and the moving direction of the child stroller 300 can be freely adjusted.

[0056] In summary, the child stroller front wheel shock absorption mechanism 100 of the embodiment can make the shock absorption seat 110 freely rotate or be locked relative to the frame 310 by switching the position of the pedal piece 190. Meanwhile, the limiting protrusion 191 can be clamped with the locking groove 112 or the release groove 113, so that the child stroller front wheel shock absorption mechanism 100 can keep a free rotation state or a locked state without being subjected to external force.

[0057] As shown in some embodiments, Figure 4As shown, in some embodiments, the child stroller front wheel shock-absorbing mechanism 100 further comprises a limiting return spring 160, which is arranged between the limiting member 180 and the shock-absorbing seat 110. The limiting return spring 160 exerts a force on the stepping member 190, so that the limiting protrusion 191 of the stepping member 190 always has a tendency to slide into the release slot 3111. Since it is more difficult for the user to exert a force on the stepping member 190 when lifting it than when stepping on it, the limiting return spring 160 can pre-exert a force on the stepping member 190, so that the user can lift the stepping member 190 more easily.

[0058] With continued reference to Figure 4 In some embodiments, the upper surface of the stepping member 190 is provided with anti-skid protrusions 192. The anti-skid protrusions 192 can increase the friction coefficient of the upper surface of the stepping member 190, and when the user steps on the upper surface of the stepping member 190 with his foot, the friction between the foot and the upper surface of the stepping member 190 can be increased, so that the foot is not easy to slip.

[0059] As Figure 9 As shown, in some embodiments, the child stroller front wheel shock-absorbing mechanism 100 further comprises a quick-release member 210 and a quick-release return spring 220. The quick-release member 210 is slidingly arranged in the shock-absorbing seat 110, and the quick-release member 210 is provided with a first through hole 211 and a second through hole 212 in communication with the first through hole 211. One end of the connecting shaft 312 inserted into the connecting hole 116 has an inner recessed clamping portion 3121, the first through hole 211 is used for clamping with the clamping portion 3121 of the connecting shaft 312, and the second through hole 212 is used for the connecting shaft 312 to pass through. The two ends of the quick-release return spring 220 are connected to the quick-release member 210 and the shock-absorbing seat 110, respectively, and the quick-release return spring 220 keeps the first through hole 211 clamped with the clamping portion 3121 of the connecting shaft 312. When it is needed to separate the frame 310 from the shock-absorbing seat 110, the quick-release member 210 is pressed and the quick-release return spring 220 is compressed, so that the second through hole 212 of the pressed quick-release member 210 is moved to cooperate with the connecting shaft 312, and the connecting shaft 312 can be pulled out of the second through hole 212 and the connecting hole 112.

[0060] With continued reference to Figure 9 In some embodiments, the child stroller front wheel shock-absorbing mechanism 100 further comprises an auxiliary limiting block 230, which is arranged in the shock-absorbing seat 110 and surrounds the outer peripheral wall of the quick-release return spring 220. The auxiliary limiting block 230 is used to ensure that the quick-release return spring 220 deforms along the axial direction during compression, so as to avoid the quick-release return spring 220 bending in the radial direction.

[0061] With continued reference to Figure 9In some embodiments, the quick release member 210 protrudes horizontally to form a third limiting portion 213, and the quick release return spring 220 is sleeved on the third limiting portion 213. The reliability of the connection between the elastic buffer 120 and the first limiting portion 132 and the second limiting portion can be increased.

[0062] In some embodiments, the child stroller front wheel shock absorption mechanism 100 further comprises a limiting return spring (not shown in the figure), the limiting protrusion 191 is embedded in the treading member 190, the limiting return spring is arranged between the limiting protrusion 191 and the treading member, and the limiting protrusion 191 changes the protrusion degree by compressing the limiting return spring. When the limiting protrusion 191 is located in the locking groove 112 or the unlocking groove 113, the protrusion degree is high, and the limiting protrusion 191 is clamped with the locking groove 112 or the unlocking groove 113. When the limiting protrusion 191 is located on the surface of the shock absorption seat 110, the limiting protrusion 191 compresses the limiting return spring, so that the protrusion degree of the limiting protrusion 191 is low, and the abrasion of the surface of the shock absorption seat 110 is reduced.

[0063] In some embodiments, the side wall surface of the locking groove 113 near the side of the unlocking groove 114 is inclined to the surface of the shock absorption seat 110, and the slot opening of the locking groove 113 is larger than the slot bottom. The side wall surface of the unlocking groove 114 near the side of the locking groove 113 is inclined to the surface of the shock absorption seat 110, and the slot opening of the unlocking groove 114 is larger than the slot bottom. The limiting protrusion 191 can slide along the inclined side wall surface to the surface of the shock absorption seat 110, reduce the required force for the limiting protrusion 191 to slide out of the locking groove 113 or the unlocking groove 114, and also reduce the abrasion of the slot wall of the locking groove 113 or the unlocking groove 114.

[0064] In some embodiments, the outer surface of the limiting protrusion 191 is arc-shaped to reduce the sliding resistance, so that the limiting protrusion 191 is easy to slide from the locking groove 113 to the unlocking groove 114.

[0065] In some embodiments, the first magnetic member 140 and the second magnetic member 150 can be permanent magnets, electromagnets, or one permanent magnet and the other electromagnet. When the first magnetic member 140 and the second magnetic member 150 are both permanent magnets, the first magnetic member 140 can be rotatably arranged on the shock-absorbing seat 110 via a rotating shaft. In order to fix the first magnetic member 140 at any position, a locking member such as a tiger mouth clamp can be arranged on the shock-absorbing seat 110, which is used to clamp the rotating shaft so that the first magnetic member 140 can be locked at any position by the locking member. It can be understood that the second magnetic member 150 can also be rotatable or non-rotatable, and the specific manner of rotation of the second magnetic member 150 can be referred to the first magnetic member 140. When the first magnetic member 140 and the second magnetic member 150 are both electromagnets, the first magnetic member 140 and the second magnetic member 150 can change the magnetic pole by changing the direction of the current. Of course, the first magnetic member 140 and the second magnetic member 150 can also change the magnetic pole by rotating. When one of the first magnetic member 140 and the second magnetic member 150 is a permanent magnet and the other is an electromagnet, the direction of the magnetic pole can be changed by referring to the above-mentioned relative rotation or changing the direction of the current.

[0066] In some embodiments, the front wheel shock-absorbing mechanism 100 further comprises a controller (not shown in the figure) and a battery (not shown in the figure), and the controller is electrically connected with the battery and the electromagnet. The battery is used to supply power to the controller and the electromagnet, and the controller is used to control the current size and direction of the electromagnet. It should be pointed out that the controller can change the magnetic force of the electromagnet by changing the current size, so that the force acting on the elastic buffer 120 changes. By periodically changing the current size, the controller can make the elastic buffer 120 periodically vibrate up and down slowly, thereby driving the baby to slowly sway up and down (simulating a cradle), which has the effect of soothing the baby and assisting the baby to fall asleep.

[0067] In some embodiments, the elastic buffer 120 is a variable stiffness spring, and common variable stiffness springs include pagoda springs, variable cross-section springs, etc. The elastic coefficients of the initial section and the final section of the variable stiffness spring are different. For example, the initial section of the variable stiffness spring can be relatively soft (the elastic coefficient is relatively small) to better filter bumps, and the final section (the elastic coefficient is relatively large) is relatively hard to provide better support and avoid the elastic buffer 120 being compressed to the limit as much as possible.

[0068] In some embodiments, the side wall surface of the locking groove 113 near the side of the unlocking groove 114 is inclined to the surface of the shock-absorbing seat 110, and the slot opening of the locking groove 113 is larger than the slot bottom. The side wall surface of the unlocking groove 114 near the side of the locking groove 113 is inclined to the surface of the shock-absorbing seat 110, and the slot opening of the unlocking groove 114 is larger than the slot bottom. The limiting protrusion 191 can slide along the inclined side wall surface to the surface of the shock-absorbing seat 110, reducing the force required for the limiting protrusion 191 to slide out of the locking groove 113 or the unlocking groove 114, and also reducing the wear of the slot wall of the locking groove 113 or the unlocking groove 114.

[0069] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation of the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0070] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A shock absorbing mechanism for a front wheel of a child's stroller for connecting between a frame of the child's stroller and a front wheel of the child's stroller for cushioning the child's stroller, characterized in that, The frame comprises a front leg and a connecting shaft arranged at the lower end of the front leg, and the shock-absorbing mechanism for the front wheel of the stroller comprises: a shock-absorbing seat vertically provided with a connecting hole for connecting the connecting shaft, and vertically provided with a vertical long hole penetrating through the left and right side walls of the shock-absorbing seat; a wheel shaft inserted into the vertical long hole and having left and right ends extending out of the shock-absorbing seat to connect the front wheel; a connecting block sleeved on the part of the wheel shaft located in the shock-absorbing seat, the wheel shaft being rotatable relative to the connecting block; a resilient buffer member clamped between the connecting block and the inner top wall of the shock-absorbing seat to provide shock-absorbing and buffering for the vertical impact between the shock-absorbing seat and the connecting shaft; a first magnetic member arranged in the shock-absorbing seat; a second magnetic member arranged in the connecting block, at least one of the first magnetic member and the second magnetic member being capable of changing the magnetic pole direction to change the acting force between the first magnetic member and the second magnetic member, and the first magnetic member and the second magnetic member being switched to repel, attract or have no acting force according to the load of the stroller; a controller electrically connected with the first magnetic member and the second magnetic member, the controller being capable of periodically changing the current size to make the resilient buffer member periodically vibrate up and down.

2. A child's pushchair front wheel suspension mechanism according to claim 1, characterised in that, The connecting block is upwardly protruded to form a first limiting part for limiting the resilient buffer member, and the inner top wall of the shock-absorbing seat is downwardly protruded to form a second limiting part, and the resilient buffer member is sleeved on the first limiting part and the second limiting part.

3. The stroller front wheel shock absorbing mechanism of claim 1, wherein, The vertical distance between the top end of the vertical long hole and the inner top wall of the shock-absorbing seat is greater than or equal to the length of the resilient buffer member when the resilient buffer member is in the limit compression state.

4. The child's vehicle front wheel shock absorbing mechanism according to claim 1, characterized in that, The shock-absorbing mechanism for the front wheel of the stroller further comprises a shaft sleeve sleeved on the wheel shaft, and the shaft sleeve is located between the front wheel and the shock-absorbing seat.

5. The stroller front wheel shock absorption mechanism of claim 1, wherein, The shock-absorbing mechanism for the front wheel of the stroller further comprises: a limiting member slidably arranged in the shock-absorbing seat, and the limiting member is capable of sliding upwardly out of the shock-absorbing seat and being inserted into a limiting groove arranged at the lower end of the front leg to limit the rotation of the shock-absorbing mechanism for the front wheel of the stroller and the front wheel relative to the front leg; a treading member rotatably connected to the shock-absorbing seat, the treading member being in transmission connection with the limiting member to drive the limiting member to slide upwardly out of the shock-absorbing seat or slide downwardly back into the shock-absorbing seat, and the treading member is upwardly provided with a limiting protrusion, and the surface of the limiting protrusion is an arc surface; when the limiting member slides to the position where the limiting protrusion is matched with the locking groove, the limiting member is out of the shock-absorbing seat and is inserted into the limiting groove, and when the limiting member slides to the position where the limiting protrusion is matched with the releasing groove, the limiting member is back into the shock-absorbing seat.

6. A child's pushchair front wheel suspension mechanism according to claim 5, wherein, The shock-absorbing mechanism for the front wheel of the stroller further comprises a limiting return spring arranged between the limiting member and the shock-absorbing seat, and the limiting return spring applies force to the treading member to make the limiting protrusion of the treading member always have a tendency to slide into the releasing groove.

7. A child's pushchair front wheel suspension mechanism according to claim 5, wherein, The upper surface of the treading member is provided with anti-skid protrusions.

8. The child's vehicle front wheel shock absorbing mechanism according to claim 1, wherein, One end of the connecting shaft inserted into the connecting hole has an inner recessed clamping part; the child stroller front wheel shock absorption mechanism further comprises: A quick release member is transversely and slidingly arranged in the shock absorption seat, the quick release member is provided with a first through hole and a second through hole in communication with the first through hole, the first through hole is used for clamping with the clamping part of the connecting shaft, and the second through hole is used for the connecting shaft to pass through; A quick release return spring has two ends connected with the quick release member and the inner side wall of the shock absorption seat respectively, and the quick release return spring exerts force on the quick release member so that the first through hole and the clamping part of the connecting shaft are kept clamped.

9. A child's pushchair front wheel suspension mechanism according to claim 8, characterised in that, The child stroller front wheel shock absorption mechanism further comprises an auxiliary limiting block, which is arranged in the shock absorption seat and surrounds the quick release return spring.

10. A child's pushchair front wheel suspension mechanism according to claim 9, characterised in that, The quick release member protrudes in the horizontal direction to form a third limiting part, and the quick release return spring is sleeved on the third limiting part.

Images