Parking structures and strollers for children

Abstract

This application discloses a parking structure including a locking structure and a driving structure. The locking structure can be switched between a locking position that prevents the rotation of the wheel and a release position that allows the rotation of the wheel. The driving structure is connected to the locking structure. The driving structure is driven from an initial position to a movable position, automatically returns from the movable position to the initial position, and can perform a reciprocating motion. By the reciprocating motion of the driving structure, the locking structure is switched from the release position to the locking position, or from the locking position to the release position. Also disclosed is a baby stroller for children.

Description

Technical Field

[0001] This application relates to a parking structure and a baby stroller having the parking structure.

Background Art

[0002] In the prior art, the wheel locking mechanism of a baby stroller is composed of a wheel, a wheel axle rotatably connected to the wheel, and a plurality of lock slots arranged in a ring shape on the wheel. A parking pedal connected to the frame is arranged on the side surface of the wheel. When the pedal is depressed, the parking block connected to the pedal is inserted into one of the lock slots, and the wheel cannot rotate. When unlocking is required, the parking pedal needs to be pulled up so that the parking block is disengaged from the lock slot. Such a locking mechanism requires two reverse operations, an upward movement and a downward movement, during operation, which is inconvenient to operate with the foot. Especially when wearing shoes with exposed toes, it is easy to hurt or stain the toes.

[0003] Therefore, there is a need to propose a parking structure that can reliably lock and unlock the wheels by stepping on the pedal in one direction.

Summary of the Invention

[0004] The parking structure of this application includes a locking structure and a driving structure. The locking structure can be switched between a locking position that prevents the rotation of the wheel and a release position that allows the rotation of the wheel. The driving structure is connected to the locking structure, driven from an initial position to a movable position, automatically returning from the movable position to the initial position, and capable of performing a reciprocating motion. Due to the reciprocating motion of the driving structure, the locking structure is switched from the release position to the locking position, or from the locking position to the release position.

[0005] In one embodiment, the locking structure includes a brake portion and a clamp portion, the brake portion being connected to a drive structure and driven by the drive structure to move between a locked position and a released position to lock or release the wheel, the clamp portion being movable between a blocked position and an unblocked position, and the clamp portion in the blocked position holding the brake portion in the locked position.

[0006] In one embodiment, the operating unit is connected to the brake unit and the clamp unit, and in the process of the brake unit moving from the release position to the locked position, the operating unit moves the clamp unit to the blocked position, and in the process of the brake unit moving from the locked position to the release position, the operating unit moves the clamp unit to the unblocked position.

[0007] In one embodiment, the clamp portion is located in a housing chamber of the housing and is capable of reciprocating motion along a first axis between a first axial position close to the brake portion and a second axial position away from the brake portion, is capable of rotating along the rotational direction about the first axis, and is switchable between the first rotational position and the second rotational position, the housing chamber of the housing is configured to allow the clamp portion in the first rotational position to move between the first axial position and the second axial position, and to prevent the clamp portion in the second rotational position from moving to the first axial position, the actuation portion is located between the brake portion and the clamp portion and contacts the clamp portion to rotate the clamp portion along the rotational direction and move it to the second axial position.

[0008] In one embodiment, the clamp portion includes a plurality of ratchet portions and a clamp portion slot, the plurality of ratchet portions protruding from the operating portion at the end of the clamp portion facing the operating portion, spaced apart along the circumferential direction of the clamp portion, each ratchet portion including a first ratchet tooth and a second ratchet tooth arranged sequentially along the rotational direction, the clamp portion slot being located between adjacent ratchet portions and extending along the first axis, a rib corresponding to the position of the clamp portion slot being located on the inner wall of the housing chamber, the rib extending along the first axis, the clamp portion slot engaging with the rib when the clamp portion is in the first rotational position, and the clamp portion slot disengaging from the rib when the clamp portion is in the second rotational position, with one of the second ratchet teeth contacting the end face of the rib.

[0009] In one embodiment, the clamp portion has a cylindrical shape surrounding the first shaft, each of the first ratchet teeth and each of the second ratchet teeth has a ratchet tooth surface extending radially, the ratchet tooth surfaces of the first ratchet teeth and the second ratchet teeth are both inclined in the same direction with respect to the first shaft, the circumferential stroke of the ratchet tooth surface of the first ratchet tooth is smaller than the circumferential stroke of the ratchet tooth surface of the second ratchet tooth, the leading edge of each ratchet tooth surface in the rotational direction is close to the operating part, and the rear end in the rotational direction is away from the operating part.

[0010] In one embodiment, the ratchet portion further includes a first peak and a second peak, the first peak being formed at the tip of the first ratchet tooth and the second peak being formed at the tip of the second ratchet tooth, and the first and second peaks being substantially located in the same cross-section with respect to the first axis.

[0011] In one embodiment, the actuation part includes a first end of the actuation part, a second end of the actuation part, and a plurality of actuation teeth, wherein the first end of the actuation part abuts against the pressing portion of the brake part, the second end of the actuation part faces the first end of the actuation part along the first axis, and the plurality of actuation teeth are arranged at intervals in the circumferential direction at the second end of the actuation part, protrude from the clamp portion, and can abut against the first ratchet teeth and the second ratchet teeth of the clamp portion.

[0012] In one embodiment, the actuation part is provided with actuation teeth corresponding to portions of the first ratchet teeth and the second ratchet teeth, and the tooth surface of each actuation tooth includes a first inclined surface and a second inclined surface connected to each other, the first inclined surface being located rearward along the rotational direction and having a relatively large inclination and a relatively small circumferential stroke, and the second inclined surface being located forward along the rotational direction and having a relatively small inclination and a relatively large circumferential stroke.

[0013] In one embodiment, the tooth surface of the operating tooth and the ratchet tooth surfaces of the first ratchet tooth and the second ratchet tooth are in contact with each other.

[0014] In one embodiment, the radial dimension of the outer circumference of each of the operating teeth is smaller than the radial dimension of the inner circumference of the rib.

[0015] In one embodiment, the actuation part is substantially cylindrical in shape and further includes an actuation part flange and an actuation part slot, wherein the actuation part flange is positioned near the enlarged diameter portion of the second end of the actuation part, and the actuation part slot is provided on the actuation part flange corresponding to the clamping part slot and engages with the rib to restrict the movement of the actuation part along the first axis.

[0016] In one embodiment, the brake portion is positioned in a receiving cavity of the housing, rotatable about a second axis between the locked position and the released position, and is at least partially fan-shaped, the brake portion includes a rising portion, a recess, a pressing portion, and a second end connecting portion for the traction member, the rising portion having a fan-shaped disc surface rising to one side along the second axis, the recess adjacent to the rising portion in the circumferential direction and recessed toward the opposite side from the rising portion, the pressing portion located outside one end of the fan shape and in contact with the operating portion, the second end connecting portion for the traction member positioned near the pressing portion and connected to the second end of the traction member of the traction member, the first end of the traction member of the traction member connected to the drive structure, the brake portion is movable between the locked position and the released position when pulled by the traction member, the lock structure further includes a lock pin, the lock pin is movable within the housing along the second axis, and when the brake portion is in the locked position, the lock pin The locking pin contacts the rising portion and protrudes from the housing, and is inserted into the corresponding slot of the wheel, thereby locking the wheel. When the brake portion is in the release position, the locking pin contacts the recess and retracts into the housing, releasing the wheel.

[0017] In one embodiment, the brake unit further includes a first indicator and a second indicator located on the fan-shaped outer surface of the brake unit, the housing having a transparent or hollow indicator window opening on the outer surface corresponding to the first and second indicators of the brake unit to display either the first or the second indicator, the first indicator being located in the indicator window when the brake unit is in the released position, and the second indicator being located in the indicator window when the brake unit is in the locked position.

[0018] In one embodiment, the second axis is substantially perpendicular to the first axis and coincides with the axis of rotation of the wheel.

[0019] In one embodiment, the drive structure includes a traction member, the traction member includes a first end of the traction member, a second end of the traction member, and a traction member engagement portion, the first end of the traction member being connected to the drive structure, the second end of the traction member being connected to the brake portion, the traction member engagement portion being engageable with the clamp portion, and when the clamp portion is in the block position, the clamp portion pulls the traction member via the traction member engagement portion to prevent the brake portion from retracting from the locked position corresponding to the block position to the released position.

[0020] In one embodiment, the parking structure further includes a clamp elastic member and a lock pin elastic member, wherein the clamp elastic member is positioned between the clamp and the housing or the wheel seat connected to the housing and biases the clamp to the first axial position, and the lock pin elastic member is positioned between the lock pin and the housing and biases the lock pin to retract into the housing.

[0021] In one embodiment, the drive structure includes a sleeve, a pedal, and a slider, wherein the sleeve is positioned laterally on a crossbeam of the frame connected to the wheel, the pedal is sleeved on the outside of the sleeve and pressed so as to rotate around the sleeve, a pedal passage is provided on the inner wall of the pedal and the pedal passage includes an inclined portion extending perpendicular to the laterally direction, the slider is positioned laterally slidably on the sleeve and a slide pin is inserted into the slider and one end of the slide pin is inserted into the pedal passage and is provided to be movable relative to the pedal passage, and when the pedal is pressed, the interaction between the slide pin and the pedal passage causes the slider to pull the traction member of the drive structure toward the center of the sleeve.

[0022] In one embodiment, the drive structure further includes an abutting member and an abutting member passage. The abutting member and the pedal are each formed as a semi-cylindrical shape and are sleeved outside the sleeve and abut against each other to form a tubular structure. The abutting member passage is disposed inside the abutting member, extends obliquely in a direction opposite to that of the pedal passage, and the other end of the slide pin is inserted into the abutting member passage and is movable relative to the abutting member passage.

[0023] The baby stroller of the present application includes a frame, at least one wheel connected below the frame, and the parking structure of the present application.

Brief Description of the Drawings

[0024] [Figure 1] It is a perspective view of a wheel set of a baby stroller according to the present application, and the pedal is in an initial position. [Figure 2] It is a perspective view of the wheel set, and the pedal is stepped down so as to be in a movable position. [Figure 3] It is a perspective view of the wheel set from another angle, and one wheel on one side is removed from each wheel set to show the parking structure. [Figure 4] It is a perspective view of the wheel. [Figure 5] It is a perspective view of the wheel set, and a part of the housing of the lock structure of the wheel and the parking structure is removed. [Figure 6] It is a partially enlarged view of the box in FIG. 5. [Figure 7] It is a perspective view of the wheel set, a part of the wheel, the wheel seat, and the housing is removed, and the brake part and the operating part are in a released position. [Figure 8] It is a partially enlarged view of the box in FIG. 7. [Figure 9] It is a perspective view of the wheel set, a part of the wheel, the wheel seat, and the housing is removed, and the brake part and the operating part are in a locked position. [Figure 10] It is a partially enlarged view of the box in FIG. 9. [Figure 11]This is a perspective view of the housing. [Figure 12] This is a top view of the housing. [Figure 13] This is a perspective view of the housing from a different angle. [Figure 14] This is a partial cross-sectional perspective view of the housing, showing the lock pin, brake mechanism, operating mechanism, and clamp mechanism located inside the housing. [Figure 15] This is a perspective view of the operating part and the clamping part. [Figure 16] This is a perspective view of the clamp section. [Figure 17] This is a bottom view of the clamp section. [Figure 18A] This is a schematic bottom view showing the rotation process of the clamp. [Figure 18B] This is a schematic bottom view showing the rotation process of the clamp. [Figure 18C] This is a schematic bottom view showing the rotation process of the clamp. [Figure 18D] This is a schematic bottom view showing the rotation process of the clamp. [Figure 18E] This is a schematic bottom view showing the rotation process of the clamp. [Figure 19] This is a perspective side view of a parking structure with part of the housing removed, and the brake and operating parts in the open position. [Figure 20] This is a partially cutaway side view of a parking structure, showing the brake and operating parts in the locked position. [Figure 21] Figure 20 is a partially enlarged cross-sectional view of the block, with different cross-sectional lines added to several parts for clarity. [Figure 22] This is a perspective side view of a parking structure with part of the housing removed, showing the brake and operating parts in the locked position. [Figure 23] This is a perspective view of the wheel set, with the pedals and contact members shown in a disassembled state. [Figure 24] This is a perspective view of the wheel set, showing each part of the drive structure in a disassembled state. [Figure 25] This is a perspective view of the pedal. [Figure 26] This is a partial cross-sectional view of the drive structure, showing the internal structure of the drive mechanism with the pedal removed, and the slider in the non-tensioned position. [Figure 27] This is a front view of the drive structure, showing the internal structure with the pedal removed, and the slider in the pulled position. [Figure 28] This is a perspective view of the drive structure with the pedals in their initial position. [Figure 29] This is a perspective view of the drive structure with the pedal in the operating position. [Modes for carrying out the invention]

[0025] Although the present invention has been described above with reference to specific embodiments, the present invention is not limited to these. Various modifications are possible without departing from the spirit of the invention.

[0026] For the sake of ease of understanding, this application uses only descriptions of directions such as "front," "back," "up," and "down." The present invention is not limited to these directions and can be adjusted according to the actual situation. Furthermore, although the present invention has been described using representative embodiments, these are illustrative and not restrictive.

[0027] The stroller for children according to this application will be described with reference to Figures 1 to 5. The stroller for children is equipped with a frame 400, and a running mechanism such as wheels 300 is arranged below the frame 400. In this application, only a part of the frame 400 connected to the set of wheels 300 is shown in the drawings, and the other parts of the frame 400 and other parts are publicly known, so their description will be omitted. In this application, the rear wheels are used as an example to explain the parking structure of the stroller for children, but it is also applicable to the front wheels.

[0028] The parking structure includes a locking structure 100 provided on each wheel 300 and a drive structure 200 provided on the frame 400. The drive structure 200 is connected to the locking structure 100 via a traction member 250 such as a cable and controls the locking structure 100. The drive structure 200 includes a pedal 210. The pedal 210 is normally in the initial position shown in Figure 1, and the user can press the pedal to reach the movable position shown in Figure 2, at which point the locking structure 100 will lock the wheels 300. When the user releases the pedal 210, the pedal 210 automatically returns to the initial position. When the user presses the pedal 210 again, the pedal 210 releases the wheels 300 via the locking structure 100. The initial and movable positions of the pedal 210 are also referred to as the initial and movable positions of the drive structure 200. The process of driving the drive structure 200 from the initial position to the movable position and then automatically returning it to the initial position is called a reciprocating motion of the drive structure. A single reciprocating motion of the drive structure 200 causes the lock structure 100 to switch from the unlocked position to the locked position, or from the locked position to the unlocked position. In other words, by pressing down on the pedal 210 (releasing the pedal 210 to allow it to return automatically) to lock and unlock the wheel 300, it is possible to avoid soiling or damaging the top of the user's foot.

[0029] Referring to Figures 3 and 4, the principle by which the locking structure 100 locks and unlocks the wheel 300 will be described. The locking structure 100 includes a housing 110 mounted below the frame 400, and the wheel 300 is rotatably connected to the frame 400 via an axle 310. A locking pin 130 is provided inside the housing 110 and can be moved in a direction parallel to the axle 310 in response to the operation of the drive structure 200, thereby inserting into a slot 320 of the wheel 300 and preventing the wheel 300 from rotating.

[0030] In this embodiment, since the two wheels 300 are arranged in sets on both sides of the housing 110, the housing 110 has two locking pins 130 (see Figure 8 for the other locking pin 130), and each of the two locking pins 30 can lock the two wheels 300. It should be understood that if only the wheels 300 are arranged on one side of the housing 110, there is only one locking pin 130. It should also be understood that the locking pins 130 may be replaced with other locking devices such as friction sheets or clamps, or some other parking devices known in the art.

[0031] The lock structure 100 according to the present invention will be described in detail with reference to Figures 5 to 10. The lock structure 100 includes a housing 110, a brake section 120, a lock pin 130, an actuator housing 110, a brake section 120, a lock pin 30, an operating section 140, and a clamp section 150, and may also include a wheel seat 160, a clamp section elastic member 191, and a lock pin elastic member 192.

[0032] The housing 110 houses the other parts of the locking structure 100 and is used to mount the wheel 300. The housing 110 is fixed to the underside of the frame 400 via the wheel seat 160, which can allow the housing 110 to rotate relative to the frame 400. The housing 110 may also be fixed directly to the underside of the frame 400, and the wheel seat 160 can be omitted.

[0033] The specific configuration of the housing 110 will be described with reference to Figures 11 to 14. The housing 110 comprises an axle hole 111, a pin hole 112, an indicator window 113, a receiving cavity 114, a housing chamber 115, and a wheel seat coupling 116. The axle hole 111 is a hole for housing the axle 310. The receiving cavity 114 is positioned around the axle hole 111 to receive the brake unit 120. The receiving cavity 114 is a substantially cylindrical cavity positioned to allow the brake unit 120 to rotate within a certain range. The pin hole 112 is provided on one side of the axle hole 111 to house the lock pin 130 and to allow the lock pin 130 to move axially. The housing chamber 115 is a substantially cylindrical cavity extending toward the frame 400.

[0034] Rib 115a is provided on the inner wall of the housing chamber 115. Rib 115a protrudes inward along the inner wall of the housing chamber 115 and extends along the first axis 193 of the locking structure 100. Rib 115a does not extend over the entire axial length of the housing chamber 115, but is partially missing at the end near the frame 400. Thus, rib 115a always engages with the actuation slot 141 of the actuation part 140, allowing the actuation part 40 to move axially and preventing rotation. The clamping part 150 can be moved between the first and second axial positions, while rib 115a prevents rotation of the clamping part 150 and prevents the clamping part 150 in the second rotation position from moving to the first axial position, only when the clamping part 150 is in a specific axial position, and will be described in detail below. Top slope 115b is provided on the upper side of rib 115a. As the clamp portion 150 rotates and moves axially, the top inclined surface 115b contacts the first ratchet teeth 152 or the second ratchet teeth 153 on the clamp portion 150, pushing and rotating the clamp portion 150. The clamp portion 150 moves axially and rotates through the actuating portion 140 and the rib 115a, circulating between a blocked position and an unblocked position, and the clamp portion 150 in the blocked position holds the brake portion 120 in the locked position. This will be explained in detail with reference to Figures 15 to 18.

[0035] The wheel seat connector 116 is positioned close to the frame 400 within the housing 110 in order to connect to the wheel seat 160.

[0036] The indicator window 113 is provided penetrating the outside of the receiving cavity 114 so that the user can easily observe the first indicator 121 or the second indicator 122 of the brake unit 120.

[0037] Returning to Figures 5 to 10, the brake section 120, the actuating section 140, and the clamping section 150 are all housed in the housing 110. The actuating section 140 is defined to reciprocate along the first shaft 193, the clamping section 150 is defined to reciprocate along the first shaft 193 and be rotatable about the first shaft 193 in the rotational direction 158 (see Figure 15), and the brake section 120 is defined to rotate about the second shaft 194. In this embodiment, the second shaft 194 is substantially perpendicular to the first shaft 193 and coincides with the rotation axis of the wheel 300. In other embodiments, the first shaft 193 and the second shaft 194 may be at other angles, and the second shaft 194 may not coincide with the rotation axis of the wheel 300.

[0038] More specifically, the brake section 120 is provided in the receiving cavity 114 of the housing 110 (see Figures 11 to 14) and can rotate around a second shaft 194 between the locked position shown in Figure 10 and the released position shown in Figure 8. The brake section 120 is approximated by a sector shape, at least partially. The brake section 120 includes a rising portion 123, a recess 124, a pressing portion 125, and a second end connecting portion 126 for the traction member.

[0039] The rising portion 123 rises on one side along the second axis 194 on the surface of the fan-shaped disk. The recess 124 is circumferentially adjacent to the rising portion 123 and recesses toward the other side opposite the rising portion 23. The pressing portion 125 is located outside one end of the fan shape and is positioned to abut against the operating portion 140. The second end connecting portion 126 of the traction member is located near the pressing portion 125 to connect the second end 252 of the traction member 250. The first end 251 of the traction member 250 is connected to the drive structure 200, which will be described in detail below.

[0040] The locking pin 130 can move along the second shaft 194 within the housing 110. When the brake unit 120 is in the locked position, the locking pin 130 abuts against the rising portion 123 and protrudes from the housing 110, inserting into the corresponding slot 320 of the wheel 300, thereby locking the wheel 300. When the brake unit 120 is in the released position, the locking pin 130 abuts against the recess 124 and retracts into the housing 110, releasing the wheel 300. Only the rising portion 123 and recess 124 on the brake unit 120 side are shown. In an embodiment in which wheels 300 are provided on both sides of the housing 110, since locking pins 130 are provided on both sides of the brake unit 120, it can be inferred that the rising portion 123 and recess 124 are provided correspondingly on both sides of the brake unit 120.

[0041] If the lock pin 130 is replaced with a parking device such as a friction piece or clamp, it should be understood that the form of the brake unit 120, including the cam and lever, can be changed accordingly, and that it only needs to be able to operate the parking device when pulled by the towing member 250.

[0042] In one embodiment, the brake unit 120 further includes a first indicator 121 and a second indicator 122, respectively, located on the fan-shaped outer surface of the brake unit 120. The first indicator 121 and the second indicator 122 can each have different visual effects; for example, the first indicator 123 may be green and the second indicator 122 may be red. The housing 110 further includes a transparent or hollow indicator window 113 (see Figures 11 to 14) that opens on the corresponding outer surfaces of the first indicator 121 and the second indicator 122 of the brake unit 120 to display one of the first indicator 121 and the second indicator 122. When the brake unit 120 is in the released position, the first indicator 121 is located in the indicator window 113, and when the brake unit 20 is in the locked position, the second indicator 122 is located in the indicator window 113. Thus, the user can easily see the state of the locking structure 100.

[0043] When the brake unit 120 is pulled by the traction member 250, the pressing portion 125 of the brake unit 120 moves toward the operating portion 140, pushing the operating portion 40 so that it moves along the first shaft 193. The operating portion 140 also moves and rotates the clamp portion 150. Hereinafter, when the brake unit 120 is in the released position, the axial position of the operating portion 140 and the clamp portion 150 is referred to as the first axial position (the position shown in Figure 8), and at this time, the clamp portion 150 is relatively close to the brake unit 120. When the brake unit 120 is in the locked position, the axial position of the operating portion 140 and the axial position of the clamp portion are referred to as the second axial position (the state shown in Figure 10), and at this time, the clamp portion 150 is relatively far from the brake unit 120. With respect to the clamp portion 150, the rotational position in which the clamp portion slot 151 and the rib 115a engage is called the first rotational position, and the rotational position in which the clamp portion slot 151 and the rib 115a disengage and the ratchet portion 156 of the clamp portion 150 (described in detail below) contacts the end face of the rib 115a is called the second rotational position.

[0044] The clamp elastic member 191 is provided between the clamp portion 150 and the housing 110 or the wheel seat 160 connected to the housing 110, and biases the clamp portion 150 to a first axial position. The lock pin elastic member 192 is positioned between the lock pin 130 and the housing 110, and biases the lock pin 130 to pull it back into the housing 110.

[0045] The specific configurations of the operating section 140 and the clamping section 150 will be described with reference to Figures 15 to 17. The clamping section 150 includes a plurality of ratchet sections 156, a clamping section slot 151, and a through slot 157.

[0046] The ratchet portion 156 protrudes toward the operating portion 140 at the end of the clamp portion 150 facing the operating portion 140 and is spaced apart in the circumferential direction of the clamp portion 150. Each ratchet portion 156 includes a first ratchet tooth 152 and a second ratchet tooth 153 arranged sequentially along the rotational direction 158.

[0047] The clamping slot 151 is located between adjacent ratchet sections 156 and extends along a first axis 193 corresponding to a rib 115a of the housing 110. When the clamping section 150 is in a first rotational position, the clamping slot 151 engages with the rib 115a, in which case the rib 115a does not obstruct the axial movement of the clamping section 150, allowing the clamping section 150 to move between a first axial position and a second axial position. When the clamp portion 150 is in the second rotation position (as will be described later, the clamp portion 150 must first reach a second or third axial position that will allow it to disengage from the rotation lock of the rib 115a and rotate to the second rotation state), the rib 115a does not engage with the clamp portion slot 151 but abuts against the ratchet slot 159, and more specifically, the top slope 115b of the rib 115a abuts against the ratchet slot 159, preventing the clamp portion 150 from moving axially to the first axial position. Thus, the housing 110 moves the clamp portion 150 in the first rotation position to the first and second axial positions, and prevents the clamp portion 150 in the second rotation position (i.e., the barrier position) from moving to the first axial position.

[0048] Referring to Figures 16 and 17, the through slot 157 is provided in one of the clamp slots 151 and penetrates the side wall of the clamp 150, facilitating the insertion of the traction member 250 into the clamp 150.

[0049] More specifically, the clamp portion 150 has a cylindrical shape surrounding the first shaft 193, and the multiple ratchet portions 156 are arranged at intervals in the circumferential direction of the clamp portion 150, with each first ratchet tooth 152 and each second ratchet tooth 153 having a ratchet tooth surface that extends radially. The ratchet tooth surfaces of the first ratchet teeth 152 and the second ratchet teeth 153 are both inclined in the same direction with respect to the first shaft 193. The circumferential stroke of the ratchet tooth surface of each first ratchet tooth 152 is smaller than the circumferential stroke of the ratchet tooth surface of each second ratchet tooth 153, the leading end of each ratchet tooth surface in the rotational direction 158 is close to the operating portion 140 (see Figure 15), and the trailing end in the rotational direction 158 is away from the operating portion 40.

[0050] The ratchet section 156 further includes a first peak 154 formed at the tip of the first ratchet tooth 152 and a second peak 155 formed at the tip of the second ratchet tooth 153. The first peak 154 and the second peak 155 are located in substantially the same cross-section with respect to the first axis 193; in other words, the first peak 154 and the second peak 155 are located in the same axial direction along the first axis 193. A ratchet slot 159 is also formed at the rear end of each second ratchet tooth 153. The ratchet slot 159 and the first peak 154 are connected via an axially extending surface, so that, when viewed from the axial direction (Figure 17), the ratchet slot 159 is located in approximately the same position as the first peak 154.

[0051] In this embodiment, three ratchet parts 156 are provided, and it should be understood that in other embodiments, more or fewer ratchet parts 156 may be provided.

[0052] The actuation part 140 includes a first actuation part end 142, a second actuation part end 143, and a plurality of actuation teeth 144, and may also include an actuation part slot 141 and an actuation part flange 145.

[0053] The first end 142 of the operating part abuts against the pressing part 125 of the brake part 120. The second end 143 of the operating part faces the first end 142 of the operating part along the first axis 193. Multiple operating teeth 144 protrude toward the clamp part 150 and are arranged at circumferential intervals on the second end 143 of the operating part so as to abut against the first ratchet teeth 152 and the second ratchet teeth 153 of the clamp part 150.

[0054] More specifically, an operating tooth 144 is positioned in each portion of the operating section 140 corresponding to the first ratchet teeth 152 and the second ratchet teeth 153. The tooth surface of each operating tooth 144 includes a first bevel 144a and a second bevel 144b connected to each other. The first bevel 144a is located at the rear along the rotational direction 158 and has a relatively large inclination and a relatively small circumferential stroke, while the second bevel 144b is located at the front along the rotational direction 156 and has a relatively small inclination and a relatively large circumferential stroke.

[0055] The tooth surface of the working tooth 144 and the ratchet tooth surfaces of the first ratchet tooth 152 and the second ratchet tooth 153 are in contact with each other, and the radial dimension of the outer circumference of each working tooth 44 is smaller than the radial dimension of the inner circumference of the rib 115a, that is, the working tooth 114 is located radially inward of the rib 115a, so that the working tooth 144 and the rib 115a do not interfere with each other when the working part 140 moves axially relative to the housing 110. Therefore, the working tooth 144 can contact the radially inward side of the ratchet part 156, and the rib 115a can contact the radially outward side of the ratchet part 156.

[0056] The actuation part 140 may have a substantially cylindrical shape. The actuation part flange 145 is provided near the enlarged diameter portion of the second end 143 of the actuation part. The actuation part slot 141 is positioned on the actuation part flange 145 corresponding to the clamping part slot 151 so as to engage with the rib 115a and restricts the movement of the actuation part 140 along the first axis.

[0057] The relative motion between the housing 110 (rib 115a), the operating part 140, and the clamping part 150 will be explained by combining Figures 18A-E and 15-17. These illustrations show the approximate positions of the above-mentioned components, but do not represent their specific shapes.

[0058] In Figure 18A, the locking structure 100 is in the released position, and at this time, the clamping portion 150 is in the non-blocking position, i.e., the first axial position and the first rotational position.

[0059] When the user presses down on the pedal 210 from the state shown in Figure 18A, the locking structure 100 reaches the position shown in Figure 18B. During this process, the traction member 250 pulls on the brake section 120, and the operating section 140 and clamp section 150 are pushed by the brake section 120 and begin to move toward the frame 400. When the pedal 210 is pressed down to the movable position, the clamp section 150 reaches a transition position between the blocked position and the unblocked position, i.e., the clamp section 150 reaches a third axial position that is closer to the frame 400 than the second axial position. On the other hand, when the pedal 210 is pressed down continuously, the clamp slot 151 is separated from the rotation restriction of the rib 115a on the clamp 150, and the clamp slot 151 is separated from the range of the rib 115a. As a result of the interaction between the ratchet part 156 (first ratchet teeth 152 and second ratchet teeth 153) and the operating teeth 144, the clamp 150 rotates in the rotation direction 158 shown in the figure, along the direction indicated by arrow 158a in Figure 15, until the first peak 154 and the second peak 155 are clamped into the groove 144c of the operating teeth 44.

[0060] Subsequently, when the user releases the pedal 210, the locking structure 100 enters the state shown in Figure 18C. During the process of the locking structure 100 shown in Figures 18B to 18C, the actuating part 140 no longer contacts the clamping part 150, and the clamping part 150 is biased toward the wheel 300 by the clamping part elastic member 191. Since the clamping part 150 is out of the first rotational position, the top slope 115b of the rib 115a contacts the ratchet tooth surface of one of the second ratchet teeth 153, applying thrust to the clamping part 150 along the rotational direction 158, so that the clamping part 150 continues to rotate along the rotational direction 156 until the rib 115a is clamped into one of the ratchet slots 159. At this time, the clamping part 150 stops in the block position, i.e., the second rotational position and the second axial position, and the brake part 120 stops in the locked position (explained in detail below).

[0061] Subsequently, the user presses the pedal 210 again, and the locking structure 100 finally reaches the state shown in Figure 18D. During the process of the locking structure 100 moving from Figure 18C to Figure 18D, the actuating part 140 again contacts the clamping part 150. Since the clamping part 150 in Figure 18C is rotated by an angle compared to the state in Figure 18B, the actuating part 140 can push the clamping part 150 and rotate it in the rotational direction 158 until the first peak 154 and the second peak 155 are clamped in the groove 144c of the actuating tooth 144.

[0062] Subsequently, the user releases the pedal 210 again, and the locking structure 100 finally returns to the state shown in Figure 18E. During the process of the locking structure 100 shown in Figures 18D to 18E, the actuation part 140 no longer contacts the clamping part 150, and the clamping part 150 is biased toward the wheel 300 by the clamping part elastic member 191. The top slope 115b of the rib 115a contacts one ratchet tooth surface of the first ratchet tooth 152, applying thrust to the clamping part 150 along the rotational direction 158 until the rib 115a is clamped into the clamping part slot 151, so the clamping part 150 continues to rotate in the rotational direction 158 until the rib 115a is clamped into the clamping part slot 151. At this point, the clamping part 150 can return to the first axial position, since the clamping part slot 151 is again in the position corresponding to the rib 115a. In other words, the clamp portion 150 in Figure 18E is in the unlocked position, the state in Figure 18E corresponds to the state in Figure 18A (where the angle at which the clamp portion 150 rotates the ratchet portion 156), and the locking structure 100 completes its operating cycle.

[0063] Referring to Figures 19 to 22, the operation procedure of the locking structure 100 can be better understood. Specifically, as shown in Figures 20 and 21, the traction member 250 is provided with a traction member engagement portion 253 that engages with the clamp portion 150. Therefore, when the clamp portion 150 is in the second axial position (i.e., the closed position), the clamp portion 150 pulls the traction member 250 via the traction member joint portion 253, and the traction member 250 pulls the second end joint portion 126 of the traction member of the brake portion 120 via the second end portion 252 of the traction member, preventing the brake portion 120 from returning to the released position and realizing the parking function.

[0064] The drive structure 200 will be described in detail with reference to Figures 23 to 29. The drive structure 200 includes a sleeve 240, a pedal 210, a slider 230, and may also include a contact member 220 and a pedal elastic member 291.

[0065] The sleeve 240 is positioned laterally on the crossbeam 410 of the frame 400, which is connected to the wheel 300, to house the other parts of the drive structure 200.

[0066] The pedal 210 is sleeved on the outside of the sleeve 240 and can be stepped on to rotate around the sleeve 240. The pedal passage 211 is located on the inner wall of the pedal 210, including an inclined portion 211a that extends laterally. In one embodiment, a vertical portion 211b that extends laterally perpendicularly may also extend from one end of the inclined portion 211a away from the wheel in order to maintain traction of the traction member 250.

[0067] The contact member 220 and the pedal 210 are formed as semi-cylindrical shapes, and they abut each other to form a tubular structure so that they can be sleeved together on the outside of the sleeve 240. As shown in Figures 24 and 26, the contact member passage 221 is provided on the inside of the contact member 220, and the contact member passage 221 extends inclined in the opposite direction to the pedal passage 211.

[0068] A slider 230 is mounted in the sleeve 240 so as to be slidable laterally, and a slider pin 231 is inserted into the slider 230. The extension direction of the slide pin 231 is almost perpendicular to the lateral direction, and both ends of the slide pin 231 are inserted into the pedal passage 211 and the contact member passage 221, respectively, and are relatively movable between the pedal passage 211 and the contact member groove 221. A traction member 250 is connected to the slider 230 via the inside of the sleeve 240, and the first end 251 of the traction member is connected to the first end connection portion 232 of the slider 230, so that the traction member 250 can be pulled by the slider 230.

[0069] When the pedal 210 is pressed, the interaction between the slide pin 231 and the pedal passage 211, and the interaction between the slide pin 231 and the contact member passage 221, move both ends of the slide pin 231 toward the center of the sleeve 240, as shown in Figure 29. This ensures that the extension direction of the slide pin 231 is perpendicular to the sliding direction (lateral direction) and that it does not rotate, and also ensures the smooth movement of the slide pin 231. Consequently, the slider 230 pulls the traction member 250 toward the center of the sleeve 240.

[0070] The pedal elastic member 291 is positioned between the pedal 210 and the sleeve 240 to bias the pedal 210 to the rebound position (initial position).

[0071] It should be understood that, depending on the requirements of use, the drive structure 200 may be replaced with a handle or other device, as long as the traction member 250 can be pulled in response to user operation.

[0072] Since this application can be embodied in various forms without departing from its spirit and substance, the embodiments described above are not limited to any of the details described above and should be interpreted as broadly as possible within the scope of the claims. Therefore, it should be understood that all changes that fall within the scope of the claims or their equivalents should be covered by the claims. [Explanation of symbols]

[0073] 100 locking mechanism 110 Housing 111 Shaft hole 112 pin holes 113 Indicator Window 114 Receiving Cavity 115 Confinement Room 115a Rib 115b Top Slope 116 Wheel seat connection 120 Brake section 121 First instruction section 122 Second instruction section 123 Rising section 124 recess 125 Pressing part 126 Second end connection part of the traction member 130 lock pins 140 Operating part 141 Operating part slot 142 First end of the operating part 143 Second end of the operating part 144 Working teeth 144a First slope 144b Second slope 144c Groove 144d Upper 145 Operating part flange 150 Clamp section 151 Clamp section slot 152 First ratchet teeth 153 Second ratchet teeth 154 First Peak 155 Second peak 156 Ratchet part 157 Through Slots 158 Direction of rotation 158a Engagement direction 159 ratchet slots 160 Wheel Seat 191 Clamp part elastic member 192 Lock pin elastic member 193 The first axis 194 The second axis 200 Drive structure 210 pedals 211 Pedal aisle 211a Slope 211b Vertical section 220 Contact Member 221 Contact member passage 230 Slider 231 Slide pins 232 First end connection part of traction member 240 sleeves 250 Towing Members 251 End of first traction member 252 Second end of traction member 253 Traction member engagement part 291 Pedal elastic member 300 wheels 310 axle 320 slots 400 frames 410 Crossbeam

Claims

1. A parking structure including a locking structure (100) and a drive structure (200), The locking structure (100) can be switched between a locked position that prevents the rotation of the wheel (300) and a released position that allows the rotation of the wheel (300). The drive structure (200) is connected to the lock structure (100), The drive structure (200) is driven from an initial position to a movable position, and automatically returns from the movable position to the initial position, and can perform a reciprocating motion, and the reciprocating motion of the drive structure (200) switches the lock structure (100) from the released position to the locked position, or from the locked position to the released position, The locking structure (100) includes a brake portion (120), a clamp portion (150), and an operating portion (140). The brake unit (120) is connected to the drive structure (200) and is driven by the drive structure (200) to move between a locked position and an unlocked position in order to lock or unlock the wheel (300). The clamp portion (150) can move between a blocked position and a non-blocked position, and the clamp portion (150) in the blocked position holds the brake portion (120) in the locked position. The actuation unit (140) is connected to the brake unit (120) and the clamp unit (150), and in the process of the brake unit (120) moving from the released position to the locked position, the actuation unit (140) moves the clamp unit (150) to the blocked position, and in the process of the brake unit (120) moving from the locked position to the released position, the actuation unit (140) moves the clamp unit (150) to the unblocked position. A parking structure characterized by the following features.

2. The clamp portion (150) is positioned in the housing chamber (115) of the housing (110), and is capable of reciprocating motion along the first axis (193) between a first axial position close to the brake portion (120) and a second axial position away from the brake portion (120), and is capable of rotating along the rotational direction (158) about the first axis (193), and is switchable between the first rotational position and the second rotational position. The housing (110) is configured such that the accommodating chamber (115) allows the clamp portion (150) in the first rotational position to move to the first axial position and the second axial position, and prevents the clamp portion (150) in the second rotational position from moving to the first axial position. The operating part (140) is positioned between the brake part (120) and the clamp part (150), and contacts the clamp part (150) to rotate the clamp part (150) along the rotation direction (158) to move it to the second axial position. The parking structure according to feature 1.

3. The clamp portion (150) includes a plurality of ratchet portions (156) and clamp portion slots (151), The plurality of ratchet parts (156) protrude toward the operating part (140) at the end of the clamp part (150) facing the operating part (140), are spaced apart along the circumferential direction of the clamp part (150), and each ratchet part (156) includes a first ratchet tooth (152) and a second ratchet tooth (153) arranged in order along the rotational direction (158). The clamp portion slot (151) is positioned between adjacent ratchet portions (156) and extends along the first axis. The rib (115a) corresponding to the position of the clamp slot (151) is positioned on the inner wall of the housing chamber (115), and the rib (115a) extends along the first axis, When the clamp portion (150) is in the first rotational position, the clamp portion slot (151) engages with the rib (115a), and when the clamp portion (150) is in the second rotational position, the clamp portion slot (151) separates from the rib (115a), and one of the second ratchet teeth (153) contacts the end face of the rib (115a). The parking structure according to feature 2.

4. The clamp portion (150) has a cylindrical shape surrounding the first shaft (193), and each of the first ratchet teeth (152) and each of the second ratchet teeth (153) has a ratchet tooth surface that extends in the radial direction. The ratchet tooth surfaces of the first ratchet tooth (152) and the second ratchet tooth (153) are both inclined in the same direction with respect to the first axis (193), the circumferential stroke of the ratchet tooth surface of the first ratchet tooth (152) is smaller than the circumferential stroke of the ratchet tooth surface of the second ratchet tooth (153), the leading edge of each ratchet tooth surface in the rotational direction (158) is close to the operating part (140), and the rear end in the rotational direction (158) is away from the operating part (140). The parking structure according to feature 3.

5. The ratchet portion (156) further includes a first peak (154) and a second peak (155), The first peak (154) is formed at the tip of the first ratchet tooth (152), The second peak (155) is formed at the tip of the second ratchet tooth (153), The first peak (154) and the second peak (155) are substantially located in the same cross-section with respect to the first axis (193). The parking structure according to feature 3.

6. The actuation part (140) includes a first end (142) of the actuation part, a second end (143) of the actuation part, and a plurality of actuation teeth (144). The first end (142) of the operating part abuts against the pressing part (125) of the brake part (120), The second end (143) of the operating part is aligned with the first shaft (193) and faces the first end (142) of the operating part. The plurality of operating teeth (144) are arranged at intervals in the circumferential direction at the second end (143) of the operating part, protrude from the clamping part (150), and can contact the first ratchet teeth (152) and the second ratchet teeth (153) of the clamping part (150). The parking structure according to feature 3.

7. In the operating part (140), the operating teeth (144) are provided corresponding to the portions of the first ratchet teeth (152) and the second ratchet teeth (153). Each of the tooth surfaces of the operating tooth (144) includes a first bevel (144a) and a second bevel (144b) connected to each other, wherein the first bevel (144a) is located rearward along the rotational direction (158) and has a relatively large inclination and a relatively small circumferential stroke, and the second bevel (144b) is located forward along the rotational direction (158) and has a relatively small inclination and a relatively large circumferential stroke. The parking structure according to claim 6.

8. The tooth surfaces of the plurality of operating teeth (144) and the ratchet tooth surfaces of the first ratchet tooth (152) and the second ratchet tooth (153) are in contact with each other. The parking structure according to claim 6.

9. The radial dimension of the outer circumference of each of the plurality of operating teeth (144) is smaller than the radial dimension of the inner circumference of the rib (115a). The parking structure according to claim 6.

10. The aforementioned operating part (140) is substantially cylindrical in shape and further includes an operating part flange (145) and an operating part slot (141), The operating part flange (145) is positioned near the enlarged diameter portion of the second end (143) of the operating part. The actuation part slot (141) is provided on the actuation part flange (145) in correspondence with the clamping part slot (151), and engages with the rib (115a) to restrict the movement of the actuation part (140) along the first axis. The parking structure according to claim 6.

11. The brake portion (120) is positioned in the receiving cavity (114) of the housing, is rotatable about a second axis (194) between the locked position and the released position, and is at least partially fan-shaped. The brake portion (120) includes a rising portion (123), a recess (124), a pressing portion (125), and a second end connecting portion (126) of the traction member. The rising portion (123) rises to one side along the second axis (194) on the fan-shaped disk surface. The recess (124) is adjacent to the rising portion (123) in the circumferential direction and is recessed toward the opposite side from the rising portion (123), The pressing portion (125) is located on the outside of one end of the fan shape and contacts the operating portion (140), The second end connecting portion (126) of the traction member is positioned near the pressing portion (125) and connected to the second end (252) of the traction member (250), the first end (251) of the traction member (250) is connected to the drive structure (200), and the brake portion (120) is moved between the locked position and the released position by being pulled by the traction member (250). The locking structure (100) further includes a locking pin (130), the locking pin (130) being movable within the housing (110) along the second axis (194), When the brake portion (120) is in the locked position, the lock pin (130) abuts against the rising portion (123) and protrudes from the housing (110) and is inserted into the corresponding slot (320) of the wheel (300), thereby locking the wheel (300). When the brake portion (120) is in the released position, the lock pin (130) abuts against the recess (124) and retracts into the housing (110), thereby releasing the wheel (300). The parking structure according to feature 2.

12. The brake portion (120) further includes a first indicator portion (121) and a second indicator portion (122) located on the fan-shaped outer surface of the brake portion (120), The housing (110) has a transparent or hollow indicator window (113) that opens on the outer circumference of the brake section (120) corresponding to the first indicator section (121) and the second indicator section (122), so as to display either the first indicator section (121) or the second indicator section (122). When the brake unit (120) is in the released position, the first indicator unit (121) is located in the indicator window (113), and when the brake unit (120) is in the locked position, the second indicator unit (122) is located in the indicator window (113). The parking structure according to feature 2.

13. The second axis (194) is substantially perpendicular to the first axis (193) and coincides with the axis of rotation of the wheel (300). The parking structure according to feature 11.

14. The aforementioned drive structure includes a traction member (250), The traction member (250) includes a first end (251) of the traction member, a second end (252) of the traction member, and a traction member engagement portion (253). The first end (251) of the traction member is connected to the drive structure (200), The second end (252) of the traction member is connected to the brake section (120), The traction member engagement portion (253) is capable of engaging with the clamp portion (150), When the clamp portion (150) is in the block position, the clamp portion (150) pulls the traction member (250) via the traction member engagement portion (253) to prevent the brake portion (120) from retracting from the locked position corresponding to the block position to the released position. The parking structure according to feature 2.

15. The parking structure further includes a clamp elastic member (191) and a lock pin elastic member (192), The clamp elastic member (191) is positioned between the clamp portion (150) and the housing (110) or the wheel seat (160) connected to the housing (110), and biases the clamp portion (150) to the first axial position. The lock pin elastic member (192) is positioned between the lock pin (130) and the housing (110) and biases the lock pin (130) to retract into the housing (110). The parking structure according to feature 2.

16. The drive structure (200) includes a sleeve (240), a pedal (210), and a slider (230). The sleeve (240) is positioned laterally on the crossbeam (410) of the frame (400) connected to the wheel (300). The pedal (210) is sleeved on the outside of the sleeve (240) and is pressed so as to rotate around the sleeve (240), the pedal passage (211) is provided on the inner wall of the pedal (210) and the pedal passage (211) includes an inclined portion (211a) that extends perpendicular to the lateral direction, The slider (230) is slidably positioned in the sleeve (240) in the lateral direction, a slide pin (231) is inserted into the slider (230), and one end of the slide pin (231) is inserted into the pedal passage (211) so as to be movable relative to the pedal passage (211). When the pedal (210) is pressed, the interaction between the slide pin (231) and the pedal passage (211) causes the slider (230) to pull the traction member (250) of the drive structure toward the center of the sleeve (240). The parking structure according to feature 1.

17. The drive structure (200) further includes a contact member (220) and a contact member passage (221), The contact member (220) and the pedal (210) are each formed as semi-cylindrical columns so as to be sleeved outside the sleeve (240), and they contact each other to form a tubular structure. The contact member passage (221) is located inside the contact member (220), extends at an inclination opposite to the pedal passage (211), and the other end of the slide pin (231) is inserted into the contact member passage (221) and is relatively movable within the contact member passage (221). The parking structure according to claim 16, characterized by the features described above.

18. Frame (400) and At least one wheel (300) connected below the frame (400), Includes the parking structure described in claim 1. A children's stroller characterized by [features].

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