Stroller wheel group braking device

Abstract

To provide a wheel group braking device for a stroller which eliminates the need to lift pedals with the feet and ensures cleanliness of the surfaces of a user's shoes. [Solution] The present invention provides a wheel group braking device for a stroller, which includes a first braking mechanism, a second braking mechanism, and a traction member, wherein the first braking mechanism is provided on a first wheel of the stroller and is used to lock or unlock the first wheel, the second braking mechanism is provided on a second wheel of the stroller and is used to lock or unlock the second wheel, and the traction member is connected between the first braking mechanism and the second braking mechanism and links the first braking mechanism and the second braking mechanism to each other when locked or unlocked, such that the operation direction when locked is the same as the operation direction when unlocked.

Description

Technical Field

[0001] The present invention relates to a baby stroller, and more particularly to a wheel group braking device for a baby stroller.

Background Art

[0002] Conventional wheel group braking devices for baby strollers are generally installed on two rear wheels, and each rear wheel is provided with a pedal for stepping on. When either pedal is stepped on, the other pedal can be moved simultaneously via a traction member, and further, the two rear wheels of the baby stroller can be braked simultaneously. When unlocking, by simply lifting either pedal using the sole of the foot, the two pedals can be moved simultaneously to unlock the two rear wheels simultaneously.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Existing baby strollers can obtain the effect of two brakes with a single step, but when unlocking, when lifting the pedal using the sole of the foot, the surface of the user's shoe is often soiled, and the user needs to clean the surface of the shoe every time they unlock, which makes it annoying to use.

Means for Solving the Problems

[0004] The present invention provides a wheel group braking device for a baby stroller including a first braking mechanism, a second braking mechanism, and a traction member. The first braking mechanism is provided on a first wheel of the baby stroller and is used to lock or unlock the first wheel. The second braking mechanism is provided on a second wheel of the baby stroller and is used to lock or unlock the second wheel. The traction member is connected between the first braking mechanism and the second braking mechanism, so that when locking or unlocking, the first braking mechanism and the second braking mechanism are interlocked with each other, and the operation direction during locking is the same as the operation direction during unlocking.

[0005] The present invention provides a first braking mechanism for a first wheel and a second braking mechanism for a second wheel, and connects the first braking mechanism and the second braking mechanism using a traction member, with the operating direction during locking and the operating direction during unlocking being the same. This enables the operations of locking and unlocking to be easily and conveniently performed, eliminating the need to lift the pedal with the sole of the foot and maintaining the cleanliness of the surface of the user's shoes.

[0006] When the first braking mechanism locks the first wheel, it drives, via the traction member, the second braking mechanism to lock the second wheel. When the second braking mechanism unlocks the second wheel, it drives, via the traction member, the first braking mechanism to unlock the first wheel. As a result, both wheels are simultaneously braked with one step and simultaneously unlocked with the other step, making the operation simple and convenient and eliminating the need to lift the pedal with the sole of the foot.

[0007] In one embodiment, the first braking mechanism includes a first shaft pin that locks or unlocks the first wheel, and the second braking mechanism includes a second shaft pin that locks or unlocks the second wheel.

[0008] Specifically, the first braking mechanism further includes a first driving member that drives the first shaft pin, the second braking mechanism further includes a second driving member that drives the second shaft pin, and the traction member is connected between the first driving member and the second driving member.

[0009] Specifically, the first driving member is rotatably provided, a first driving slope is provided on the side surface of the first driving member, the first braking mechanism further includes a first elastic member, the first shaft pin is slidably provided, and when the first driving member rotates, it is inserted into the first wheel by the pressing of the first driving slope or exits from the first wheel by the elastic force of the first elastic member.

[0010] Specifically, a locking position is provided at one end of the first driving slope, and an unlocking position is provided at the other end.

[0011] Specifically, the first drive member is provided with an arcuate guide hole for guiding its rotation.

[0012] Specifically, the first drive member is provided with a first operating member for driving its rotation.

[0013] Specifically, the second drive member is rotatably provided, a second drive slope is provided on the side surface of the second drive member, the second braking mechanism further includes a second elastic member, the second shaft pin is slidably provided, and when the second drive member rotates, it is inserted into the second wheel by the pressing of the second drive slope, or exits from the second wheel by the elastic force of the second elastic member.

[0014] Specifically, a drive inclined hole is provided in the second drive member, the second braking mechanism further includes a third elastic member and a second operating member, the second operating member has a shaft pin, the shaft pin is slidably inserted into the drive inclined hole, and the third elastic member provides an elastic force for resetting the second drive member.

[0015] Specifically, a locking position is provided at one end of the second drive slope, and an unlocking position is provided at the other end.

[0016] Specifically, when the first braking mechanism locks the first wheel, it drives the second braking mechanism to lock the second wheel, or when the first braking mechanism unlocks the first wheel, it drives the second braking mechanism to unlock the second wheel.

[0017] Specifically, the first braking mechanism further includes an engaging hook. The first driving member is provided with a first guide groove and a second guide groove. An engaging position and an unlocking position are provided between the first guide groove and the second guide groove. One end of the engaging hook is fixed to the frame of the baby carriage, and the other end of the engaging hook is slidably provided in one of the first guide groove and the second guide groove. When the first driving member rotates and the first shaft pin presses to lock the first wheel, the engaging hook slides from the first guide groove to the engaging position. When the first driving member rotates and the first shaft pin presses to unlock the first wheel, the engaging hook slides from the engaging position to the unlocking position.

[0018] The frame of the baby carriage is provided with a fixing hole, and one end of the engaging hook is bent and inserted into the fixing hole. The fixing hole can limit one end of the engaging hook and ensure that the engaging hook can rotate at a certain angle when sliding in each guide groove, and can enhance the flexibility of the engaging hook.

[0019] Specifically, the first driving member is further provided with a third guide groove and a fourth guide groove. Both ends of the third guide groove are connected to the first guide groove and the engaging position, and both ends of the fourth guide groove are connected to the engaging position and the second guide groove.

[0020] Specifically, a guide slope for sliding the engaging hook into the second guide groove is provided between the fourth guide groove and the second guide groove. When the engaging hook slides upward in the fourth guide groove to unlock, it may deform the engaging hook, and there is also a phenomenon of crushing the groove wall of the fourth guide groove. Therefore, by providing the guide slope, the engaging hook can be automatically and quickly slid into the second guide groove, avoiding the problems of deforming the engaging hook and crushing the groove wall of the fourth guide groove, and extending the service life.

Brief Description of the Drawings

[0021]

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Modes for Carrying Out the Invention

[0022] In order to explain in detail the technical content, structural features, and achieved effects of the present invention, the following will be described in detail with reference to the drawings in combination with examples.

[0023] As shown in FIG. 1, the configuration of the wheel group braking device 100 of the baby stroller according to Embodiment 1 of the present invention is shown in the figure.

[0024] The wheel group braking device 100 of the baby stroller of the present invention is attached to the rear side of the baby stroller and includes a first braking mechanism 1, a second braking mechanism 2, and a traction member 3. The first braking mechanism 1 is provided on the first rear wheel seat 103 of the baby stroller frame and is used to lock the first rear wheel 101. The second braking mechanism 2 is provided on the second rear wheel seat 104 of the baby stroller frame and is used to unlock the second rear wheel 102. The traction member 3 is connected between the first braking mechanism 1 and the second braking mechanism 2, and interlocks the first braking mechanism 1 and the second braking mechanism 2 when locking or unlocking. Thus, when the first braking mechanism 1 locks the first rear wheel 101, it drives the second braking mechanism 2 to lock the second rear wheel 102, or when the second braking mechanism 2 unlocks the second rear wheel 102, it drives the first braking mechanism 1 to unlock the first rear wheel 101. The operating direction of the first braking mechanism 1 when locked is the same as the operating direction of the second braking mechanism 2 when unlocked.

[0025] As shown in FIGS. 2 to 4, the first braking mechanism 1 includes a first shaft pin 11, a first driving member 12 for driving the first shaft pin 11, and a first elastic member 13, and the first elastic member 13 is a compression spring. The first shaft pin 11 is used to lock the first rear wheel 101, and the second braking mechanism 2 includes a second shaft pin 21 and a second driving member 22 for driving the second shaft pin 21, and the second shaft pin 21 is used to lock the second rear wheel 102. The traction member 3 is connected between the first driving member 12 and the second driving member 22. Specifically, the first driving member 12 is rotatably provided on the first rear wheel seat 103, and a first driving slope 121 is provided on the side surface of the first driving member 12. The first shaft pin 11 is slidably provided on the first rear wheel seat 103, one end of which is slidably abutted against the first driving slope 121, and the first elastic member 13 is provided in the first rear wheel seat 103 to provide an elastic force for inserting the first shaft pin 11 into the first rear wheel 101. When the first driving member 12 rotates, the first shaft pin 11 is inserted into the first rear wheel 101 by the pressing of the first driving slope 121, or exits from the first rear wheel 101 by the elastic force of the first elastic member 13. A locking position 122 is provided at one end of the first driving slope 121, and a unlocking position 123 is provided at the other end. When the first driving member 12 is placed horizontally, the locking position 122 is located at a higher position of the first driving member 12, and the unlocking position 123 is located at a lower position of the first driving member 12. When one end of the first shaft pin 11 is inserted into the first rear wheel 101, the other end of the first shaft pin 11 is located at the locking position 122, and when one end of the first shaft pin 11 exits from the first rear wheel 101, the other end of the first shaft pin 11 is located at the unlocking position 123. An arc-shaped guide hole 124 for guiding the rotation of the first driving member 12 is provided on the first driving member 12. A guide post is provided on the first rear wheel seat 103, and the guide post is slidably inserted into the arc-shaped guide hole 124. A first operating member 125 is further provided on the first driving member 12 to make it easier for the user to step on with the foot.

[0026] Referring to FIGS. 4 and 5, the second driving member 22 is slidably provided on the second rear wheel seat 104, a driving inclined hole 221 is provided in the second driving member 22, the second braking mechanism 2 further includes a third elastic member 23 and a second operating member 24, the second operating member 24 has a shaft pin 241, and the shaft pin 241 is slidably inserted into the driving inclined hole 221. The third elastic member 23 is provided between the second rear wheel seat 104 and the second driving member 22, and provides an elastic force for rotating and resetting the second driving member 22. The third elastic member 23 is a compression spring. Specifically, a second driving inclined surface 222 is provided on the side surface of the second driving member 22, the second braking mechanism 2 further includes a second elastic member 25, the second shaft pin 21 is slidably provided on the second rear wheel seat 104, the second elastic member 25 is provided on the second rear wheel seat 104 and fitted on the second shaft pin 21, and provides an elastic force for resetting the second shaft pin 21. When the second driving member 22 rotates, the second shaft pin 21 can be inserted into the second rear wheel 102 by the pressing of the second driving inclined surface 222, or can withdraw from the second rear wheel 102 by the elastic force of the second elastic member 25. Specifically, a locking position 223 is provided at one end of the second driving inclined surface 222, and a unlocking position 224 is provided at the other end. When the second driving member 22 is placed horizontally, the locking position 223 is located at the high position of the second driving member 22, the unlocking position 224 is located at the low position of the second driving member 22. When one end of the second shaft pin 21 is inserted into the second rear wheel 102, the other end of the second shaft pin 21 is located at the locking position 223. When one end of the second shaft pin 21 withdraws from the second rear wheel 102, the other end of the second shaft pin 21 is located at the unlocking position 224.

[0027] Referring to FIGS. 6 and 7 described above, the operating principle of the wheel group braking device 100 of the stroller according to this embodiment will be described in detail below.

[0028] When braking is required, step on the pedal of the first drive member 12 with your foot. When the first drive member 12 rotates, the first drive slope 121 slides relative to the first shaft pin 11, and the first shaft pin 11 slides from the unlocking position 123 along the first drive slope 121 to the locking position 122. In this process, the first drive slope 121 inserts the first shaft pin 11 into the first rear wheel 101, and further brakes the first rear wheel 101. When the first drive member 12 rotates, at the same time, the first drive member 12 pulls the traction member 3, and the traction member 3 drives the second drive member 22 to rotate. The second drive slope 222 of the second drive member 22 drives the second shaft pin 21 to be inserted into the second rear wheel 102, and the second shaft pin 21 slides from the unlocking position 224 along the second drive slope 222 to the locking position 223. At this time, the first rear wheel 101 and the second rear wheel 102 are in a state of being locked simultaneously.

[0029] When unlocking is required, step on the second operating member 24 on the other side with your foot and move the second operating member 24 downward. The shaft pin 241 of the second operating member 24 slides in the drive inclined hole 221 and drives the second drive member 22 to rotate. The second drive member 22 drives the second drive slope 222 to rotate, and due to the elastic force of the second elastic member 25, the second shaft pin 21 slides from the locking position 223 to the unlocking position 224. The other end of the second shaft pin 21 exits from the second rear wheel 102. At the same time, the second drive member 22 drives the first drive member 12 to rotate through the traction member 3, and the first drive member 12 drives the first drive slope 121 to rotate. Due to the elastic force of the first elastic member 13, the first shaft pin 11 slides from the locking position 122 to the unlocking position 123. The other end of the first shaft pin 11 exits from the first rear wheel 101. At this time, the first rear wheel 101 and the second rear wheel 102 are in a state of being unlocked simultaneously.

[0030] Briefly speaking, when braking is required, step down with your foot in the operating direction of the first operating member 125. Similarly, when unlocking is required, step down with your foot in the operating direction of the second operating member 24 on the other side. Therefore, there is no need to lift the pedal with the sole of your foot.

[0031] In the present invention, a first braking mechanism 1 is provided on the first rear wheel 101, a second braking mechanism 2 is provided on the second rear wheel 102, and the first braking mechanism 1 and the second braking mechanism 2 are connected by a traction member 3. When the first braking mechanism 1 locks the first rear wheel 101, the second braking mechanism 2 is driven to lock the second rear wheel 102. Or when the second braking mechanism 2 unlocks the second rear wheel 102, the first braking mechanism 1 is driven to unlock the first rear wheel 101. Furthermore, the effect that both rear wheels are braked simultaneously with one step of locking is achieved, and on the other side, both rear wheels are simultaneously unlocked with one step of unlocking. The operation is simple and convenient, and moreover, there is no need to lift the pedal with the sole of the foot, ensuring that the surface of the user's shoes is clean.

[0032] As shown in FIGS. 8 to 12, the figure shows the structure of the wheel group braking device 100' of the baby stroller in Embodiment 2 of the present invention.

[0033] As shown in FIGS. 8 to 10, the wheel group braking device 100' of the stroller in this embodiment includes a first braking mechanism 1', a second braking mechanism 2' and a traction member 3'. The first braking mechanism 1' is provided on the first rear wheel seat 103 of the stroller frame and is used to lock or unlock the first rear wheel 101. The second braking mechanism 2' is provided on the second rear wheel seat 104 of the stroller frame and is used to lock or unlock the second rear wheel 102. The traction member 3' is connected between the first braking mechanism 1' and the second braking mechanism 2' to interlock the first braking mechanism 1' and the second braking mechanism 2' when locking or unlocking. When the first braking mechanism 1' locks the first rear wheel 101, it drives the second braking mechanism 2' to lock the second rear wheel 102. When the first braking mechanism 1' unlocks the first rear wheel 101, it drives the second braking mechanism 2' to unlock the second rear wheel 102. The operation direction when the first braking mechanism 1' locks is the same as the operation direction when the first braking mechanism 1' unlocks.

[0034] As shown in FIGS. 9 to 12, the first braking mechanism 1' includes a first shaft pin 11', a first driving member 12' for driving the first shaft pin 11', and an engaging hook 13'. The first shaft pin 11' is used to lock or unlock the first rear wheel 101. The second braking mechanism 2' includes a second shaft pin and a second driving member for driving the second shaft pin. The second shaft pin and the second driving member for driving the second shaft pin in this embodiment are the same as the configuration of the first shaft pin 11 and the first driving member 12 in Embodiment 1, and the description thereof is omitted here. The second shaft pin is used to lock or unlock the second rear wheel 102. The traction member 3' is connected between the first driving member 12' and the second driving member. The first driving member 12' is provided with a first guide groove 121' and a second guide groove 122'. An engaging position 123' and a release position 124' are provided between the first guide groove 121' and the second guide groove 122'. The first driving member 12' is further provided with a third guide groove 125' and a fourth guide groove 126'. Both ends of the third guide groove 125' are connected to the first guide groove 121' and the engaging position 123'. Both ends of the fourth guide groove 126' are connected to the engaging position 123' and the second guide groove 122'. The first guide groove 121', the third guide groove 125', the engaging position 123', the fourth guide groove 126', the second guide groove 122', and the release position 124' are sequentially connected to form a cycle. A V-shaped structure is formed between the third guide groove 125', the engaging position 123', and the fourth guide groove 126' to prevent the unexpected detachment of the engaging hook 13' from the engaging position 123'. One end of the engaging hook 13' is fixed to the first rear wheel seat 103 of the stroller, and the other end of the engaging hook 13' sequentially passes through the first guide groove 121', the third guide groove 125', the engaging position 123', the fourth guide groove 126', the second guide groove 122', and the release position 124' in a slidable manner.When the first drive member 12' rotates and presses the first shaft pin 11' to lock the first rear wheel 101, the engagement hook 13' slides from the first guide groove 121' to the engagement position 123'. When the first drive member 12' rotates and presses the first shaft pin 11' to unlock the first rear wheel 101, the engagement hook 13' slides from the engagement position 123' to the unlocking position 124'. A fixing hole 1031 is provided in the first rear wheel seat 103 of the stroller frame, and one end of the engagement hook 13' is bent and inserted into the fixing hole 1031. The fixing hole 1031 limits the position of one end of the engagement hook 13' and ensures that the engagement hook 13' can rotate at a certain angle when sliding in each guide groove, enhancing the flexibility of the engagement hook 13' and avoiding deformation of the engagement hook 13'.

[0035] Also, as shown in FIG. 11, a guide slope 129' for sliding the engagement hook 13' into the second guide groove 122' is provided between the fourth guide groove 126' and the second guide groove 122'. When the engagement hook 13' slides upward in the fourth guide groove 126' to unlock, there is a possibility of deforming the engagement hook 13', and there is also a phenomenon of crushing the groove wall of the fourth guide groove 126'. Therefore, by providing the guide slope 129', the engagement hook 13' can be automatically and quickly slid into the second guide groove 122', thereby avoiding the problems of deforming the engagement hook 13' and crushing the groove wall of the fourth guide groove 126', and extending the service life.

[0036] Referring to FIGS. 9 and 12, specifically, the first braking mechanism 1' further includes a first elastic member 14', the first elastic member 14' is a compression spring, and the first elastic member 14' is provided in the first rear wheel seat 103 and fitted to the first shaft pin 11'. A first driving slope 127' is provided on the side surface of the first driving member 12', the first shaft pin 11' is slidably provided on the first rear wheel seat 103, and when the first driving member 12' rotates, it is inserted into the first rear wheel 101 under the pressing of the first driving slope 127', or exits from the first rear wheel 101 due to the elastic force of the first elastic member 14'. The first driving slope 127' in this embodiment further has the same configuration as the locking position 122 provided at one end and the unlocking position 123 provided at the other end of the first driving slope 121 in Embodiment 1, thereby limiting the position of the first shaft pin 11', and the description thereof is omitted here. An operating member (such as a pedal 128') for stepping on is further provided on the first driving member 12'.

[0037] The second braking mechanism 2' further includes a second elastic member and a third elastic member. Although the specific configuration diagram of the second braking mechanism 2' in this Embodiment 2 is not illustrated, it is the same as the configuration and principle of Embodiment 1, and the drawings of Embodiment 1 can be referred to. The third elastic member is provided within the second rear wheel seat 104 and can provide an elastic force for the second driving member to rotate and reset. The second elastic member is a compression spring and is fitted onto the second shaft pin. A second driving slope is provided on the side surface of the second driving member. The second shaft pin is slidably provided on the second rear wheel seat 104. When the second driving member rotates, it is inserted into the second rear wheel 102 under the pressing of the second driving slope, or exits from the second rear wheel 102 due to the elastic force of the second elastic member. Specifically, a locking position is provided at one end of the second driving slope, and an unlocking position 124' is provided at the other end. When the second driving member is placed horizontally, the locking position is located at the higher position of the second driving member, and the unlocking position 124' is located at the lower position of the second driving member. When one end of the second shaft pin is inserted into the second rear wheel 102, the other end of the second shaft pin is located at the locking position. When one end of the second shaft pin exits from the second rear wheel 102, the other end of the second shaft pin is located at the unlocking position 124'.

[0038] Referring to FIGS. 8 to 12 described above, the operating principle of the wheel group braking device 100' of the stroller in this embodiment will be described in detail below.

[0039] If brakes are needed, step on the pedal of the first driving member 12' with your foot. When the first driving member 12' rotates, the engaging hook 13' slides from the first guide groove 121' to the third guide groove 125', and further slides from the third guide groove 125' to the engaging position 123'. During this process, the first driving slope 127' slides relative to the first shaft pin 11', and the first shaft pin 11' slides from the unlocking position 124' along the first driving slope 127' to the locking position. At the same time, the first driving slope 127' drives the first shaft pin 11' to insert into the first rear wheel 101, and further brakes the first rear wheel 101. Also, when the first driving member 12' rotates, at the same time, the first driving member 12' pulls the traction member 3', and the traction member 3' rotates the second driving member, and the second driving slope of the second driving member drives the second shaft pin to insert into the second rear wheel 102, and the second shaft pin slides from the unlocking position 124' along the second driving slope to the locking position. At this time, the first rear wheel 101 and the second rear wheel 102 are in a state of being locked simultaneously.

[0040] When unlocking is required, step on the pedal of the first drive member 12' downward with your foot again. When the first drive member 12' rotates, the engaging hook 13' moves away from the engaging position 123', slides into the fourth guide groove 126', and then the engaging hook 13' enters the guide slope 129' from the fourth guide groove 126'. Under the guidance of the guide slope 129', the engaging hook 13' slides into the second guide groove 122' and further slides from the second guide groove 122' to the unlocking position 124'. During this process, the first drive member 12' rotates the first drive slope 127', and under the elastic force of the first elastic member 14', the first shaft pin 11' slides from the locked position to the unlocking position 124'. The other end of the first shaft pin 11' exits from the first rear wheel 101. At the same time, the first drive member 12' rotates the second drive member through the traction member 3'. The second drive member rotates the second drive slope, and under the elastic force of the second elastic member, the second shaft pin slides from the locked position to the unlocking position 124'. The other end of the second shaft pin exits from the second rear wheel 102. At this time, the first rear wheel 101 and the second rear wheel 102 are both in the unlocked state.

[0041] Briefly speaking, when braking is required, step on the operation direction of the operation member (i.e., the pedal 128') of the first drive member 12' downward with your foot. When unlocking is required, step on the operation direction of the pedal 128' downward with your foot again in the same way as when unlocking is required, and there is no need to lift the pedal with the sole of your foot.

[0042] The present invention provides a first braking mechanism 1' on a first rear wheel 101, a second braking mechanism 2' on a second rear wheel 102, and connects the first braking mechanism 1' and the second braking mechanism 2' with a traction member 3'. When the first braking mechanism 1' locks the first rear wheel 101, it drives the second braking mechanism 2' to lock the second rear wheel 102. Or when the first braking mechanism 1' releases the lock of the first rear wheel 101, the second braking mechanism 2' is driven to release the lock of the second rear wheel 102. Furthermore, with one step of locking or unlocking, both rear wheels are braked simultaneously, achieving the effect of double braking with one step. The operation is simple and convenient, and there is no need to lift the pedal with the sole of the foot, ensuring the cleanliness of the user's shoe surface.

[0043] Figures 13 to 34 exemplarily show the configuration of the wheel group braking device 100” of the baby stroller in Embodiment 3 of the present invention.

[0044] The wheel group braking device 100” of the baby stroller includes a first braking mechanism 1”, a second braking mechanism 2” and a traction member 3”. The first braking mechanism 1' is provided on the first wheel 101” of the baby stroller and is used to lock or unlock the first wheel 101”. The second braking mechanism 2” is provided on the second wheel 102” of the baby stroller and is used to lock or unlock the second wheel 102”. The traction member 3” is connected between the first braking mechanism 1” and the second braking mechanism 2, and interlocks the first braking mechanism 1” and the second braking mechanism 2” when locking or unlocking.

[0045] As shown in FIGS. 13 to 14, the wheel group braking device 100” of the stroller includes a drive mechanism 4 provided on the frame F of the stroller. The drive mechanism 4 is connected to a first braking mechanism 1” and a second braking mechanism 2” via a traction member 3” (not shown). When the drive mechanism 4 is operated along one direction, it can drive the first braking mechanism 1” and the second braking mechanism 2” simultaneously via the traction member 3” to lock the first wheel 101” and the second wheel 102” respectively. Thereafter, when the drive mechanism 4 is operated in the same direction, it can drive the first braking mechanism 1” and the second braking mechanism 2” simultaneously via the traction member 3” to unlock the first wheel 101” and the second wheel 102” respectively.

[0046] Next, with reference to FIGS. 15 to 29, the configuration related to the secondary operation in the same direction of the drive mechanism 4 in Embodiment 3 of the present invention will be described.

[0047] As shown in FIG. 15, the drive mechanism 4 includes a fixed seat 41 fixed to the frame F of the stroller and a third drive member 42. The main body portion 421 of the third drive member 42 is rotatably provided on the fixed seat 41, and the third drive member 42 is rotatable around the central axis of the frame F. From the main body portion 421, a third operation member 422 for the user to operate, such as a pedal or an operation lever, extends. In the embodiment shown in FIGS. 13 and 14, the frame F may be a connecting rod between the first wheel 101” and the second wheel 102” (for example, a horizontal pipe between both rear leg pipes), and the fixed seat 41 is fixed to the connecting rod.

[0048] As shown in FIG. 16A, the main body portion 421 of the third drive member 42 includes a guide side surface 423. As shown in FIG. 17, the guide side surface 423 includes a first guide groove 423a and a second guide groove 423b. An engagement groove 423c and a release groove 423d are provided between the first guide groove 423a and the second guide groove 423b. The first guide groove 423a, the engagement groove 423c, the second guide groove 423b, and the release groove 423d are sequentially connected as a closed annular groove.

[0049] Note that, on the other side of the main body portion 421 of the third drive member 42 facing the guide side surface 423, the same guide side surface may be provided, or as shown in FIG. 26, the guide side surface may not be provided.

[0050] As shown in FIGS. 16A and 16B, the drive mechanism 4 further includes an engagement torsion spring 43 including a fixing portion 431 and a torsion spring head 432 extending from the fixing portion 431. The fixing portion 431 is fixed to the fixing seat 41, and the torsion spring head 432 is slidably provided in the annular groove of the guide side surface 423. When the third drive member 42 pivots about the central axis of the frame F, the torsion spring head 432 starts from the unlocking groove 423d and sequentially slides counterclockwise in the first guide groove 423a, the engagement groove 423c, the second guide groove 423b, and the unlocking groove 423d.

[0051] In order to ensure that the torsion spring head 432 slides counterclockwise in the annular groove of the guide side surface 423, in one embodiment, the angle θ1 between the first guide groove 423a and the unlocking groove 423d is greater than 90 degrees, and the angle θ2 between the second guide groove 423b and the engagement groove 423c is greater than 90 degrees. Thus, when the third drive member 42 rotates along the first direction D1 (FIG. 19), the torsion spring head 432 tends to slide from the unlocking groove 423d to the first guide groove 423a. Also, when the third drive member 42 pivots again along the first direction D, the torsion spring head 432 tends to slide from the engagement groove 423c to the second guide groove 423b. Here, the angle between the two grooves means the angle between the substantially extending directions of the two grooves.

[0052] In another embodiment shown in FIG. 17B, the bottom surface of at least one of the first guide groove 423a, the engagement groove 423c, the second guide groove 423b, and the unlocking groove 423d is provided so as to gradually increase from one end to the other end of the groove along the counterclockwise direction indicated by the arrow in FIG. 17B. Thereby, a stepped structure is formed between the bottom surfaces of at least two adjacent grooves among the first guide groove 423a, the engagement groove 423c, the second guide groove 423b, and the unlocking groove 423d, thereby preventing the torsion spring head 432 from sliding in the reverse direction in the annular groove of the guide side surface 423.

[0053] In one aspect, the bottom surfaces of the four grooves can all be configured to gradually increase from one end to the other end of the groove along the counterclockwise direction indicated by the arrow in FIG. 17B so that a stepped structure is formed between the bottom surfaces of two adjacent grooves. That is, based on the connection point between the first guide groove 423a and the engagement groove 423c, the bottom surface of the first guide groove 423a is higher than the bottom surface of the engagement groove 423c. Based on the connection point between the engagement groove 423c and the second guide groove 423b, the bottom surface of the engagement groove 423c is higher than the bottom surface of the second guide groove 423b. Based on the connection point between the second guide groove 423b and the unlocking groove 423d, the bottom surface of the second guide groove 423b is higher than the bottom surface of the unlocking groove 423d. Based on the connection point between the unlocking groove 423d and the first guide groove 423a, the bottom surface of the unlocking groove 423d is higher than the bottom surface of the first guide groove 423a.

[0054] In another aspect, the bottom surface of one groove, for example, the bottom surface of the engagement groove 423c, may be provided so that the height does not change from one end to the other end of the groove, and the bottom surfaces of the other three grooves may be provided so as to gradually increase from one end to the other end of the groove along the counterclockwise direction indicated by the arrow in FIG. 17B.

[0055] In yet another aspect, the bottoms of all four grooves are provided such that they gradually rise from one end of the groove to the other end in the counterclockwise direction indicated by the arrow in FIG. 17B. However, a step structure is not formed between the bottoms of two adjacent grooves, for example, between the bottom of the unlocking groove 423d and the bottom of the first guide groove 423a, while a step structure is formed between the bottoms of other adjacent grooves.

[0056] Furthermore, as shown in FIGS. 24 and 25, the engaging groove 423c is divided into two segments 423c21 and 423c22 along the extending direction of the annular groove. A step structure is formed between the bottoms of these two segments, and the bottom of the segment 423c21 closer to the first guide groove 423a is higher than the bottom of the segment 423c22 closer to the second guide groove 423b, thereby ensuring that the torsion spring head 432 smoothly engages with the engaging groove 423c.

[0057] Also, the engaging torsion spring 43 can include a fixed torsion spring head 433 (see FIG. 26) extending from the fixing portion 431. As shown in FIG. 26, the fixed torsion spring head 433 is provided on the other side facing the guide side surface 423 of the main body portion 421 of the third driving member 42 and is used to better fix the engaging torsion spring 43.

[0058] As shown in FIGS. 27 to 29, the driving mechanism 4 further includes a reset torsion spring 44. The first end 441 of the reset torsion spring 44 is fixed to the fixed seat 41, and as shown in FIGS. 27 and 28, the second end 442 is fixed to the main body portion 421 of the third driving member 42. For example, as shown in FIG. 29, the second end 442 may be fixed to a through hole at the bottom of the main body portion 421. The reset torsion spring 44 is used to return the third driving member 42 to the initial position.

[0059] Next, the operation of the driving mechanism 4 according to Embodiment 3 of the present invention being secondarily operated in the same operation direction will be described.

[0060] As shown in FIG. 18, when the third drive member 42 is in the initial position, the torsion spring head 432 is located in the unlocking groove 423d.

[0061] When the drive mechanism 4 is operated in one direction by the user, for example, when the user applies a downward pressure to the third operating member 422 of the third drive member 42, the third drive member 42 pivots in the first direction D1 against the elastic force of the reset torsion spring 44, as shown in FIG. 19, and the torsion spring head 432 slides along the unlocking groove 423d into the first guide groove 423a.

[0062] As the third drive member 42 continues to pivot along the first direction D1, the torsion spring head 432 slides along the first guide groove 423a into the engagement groove 423c. At this time, as shown in FIG. 20, the torsion spring head 432 catches on the outer wall of the engagement groove 423c, and the third drive member 42 can no longer continue to pivot along the first direction D1, that is, the third drive member 42 pivots to the end position along the first direction D1. In this process, the drive mechanism 4 simultaneously drives the first braking mechanism 1” and the second braking mechanism 2” via the traction member 3” to lock the first wheel 101” and the second wheel 102” respectively. The outer wall of the engagement groove 423c refers to the side wall far from the center of the annular groove, and the following inner wall of the engagement groove 423c refers to the side wall close to the center of the annular groove.

[0063] When the user stops applying a downward pressure to the third operating member 422 of the third driving member 42, the third driving member 42 pivots in the second direction D2 by the elastic force of the reset torsion spring 44, and the torsion spring head 432 moves away from the outer wall of the engaging groove 423c and abuts against the inner wall of the engaging groove 423c, preventing the third driving member 42 from continuing to pivot in the second direction D2 and holding the third driving member 42 in the locked position. In this process, since the process of the third driving member 42 pivoting along the second direction D2 is very short, the first braking mechanism 1” and the second braking mechanism 2” keep the first wheel 101” and the second wheel 102” locked. To ensure that the torsion spring head 432 abuts against the inner wall of the engaging groove 423c without accidentally coming off, the inner wall of the engaging groove 423c can include a recess 423c1 for positioning the torsion spring head 432. As shown in FIG. 21, the angle of this recess 423c1 is greater than 90 degrees. The angle of the recess is the angle between two segments of the inner wall of the engaging groove 423c that form the recess.

[0064] When the driving mechanism 4 is re-operated by the user in the same direction, for example, when the user applies a downward pressure to the third operating member 422 of the third driving member 42 again, the third driving member 42 re-pivots in the first direction D1 against the elastic force of the reset torsion spring 44, and the torsion spring head 432 moves away from the inner wall of the engaging groove 423c and reaches the outer wall as shown in FIG. 22. As the third driving member 42 continues to pivot along the first direction D1, the torsion spring head 432 slides along the engaging groove 423c into the second guide groove 423b until, as shown in FIG. 23, the torsion spring head 432 slides into the second guide groove 423b and catches on the end wall of the second guide groove 423b, thereby preventing the third driving member 42 from continuing to pivot along the first direction D1. In this process, since the process of the third driving member 42 pivoting along the first direction D1 is also very short, the first braking mechanism 1” and the second braking mechanism 2” keep the first wheel 101” and the second wheel 102” locked.

[0065] Unless the user applies a downward pressure to the third operating member 422 of the third driving member 42, the third driving member 42 pivots in the second direction D2 by the elastic force of the reset torsion spring 44, and the torsion spring head 432 slides along the second guide groove 423b to the unlocking groove 423d, and the third driving member 42 returns to the initial position as shown in FIG. 18. In this process, the driving mechanism 4 drives each of the first braking mechanism 1" and the second braking mechanism 2" via the traction member 3" to unlock the first wheel 101" and the second wheel 102" simultaneously.

[0066] Hereinafter, with reference to FIGS. 30 to 32, a method in which the driving mechanism 4 in Embodiment 3 of the present invention drives the first braking mechanism 1 and the second braking mechanism 2 simultaneously via the traction member 3 will be described.

[0067] As shown in FIG. 32, a pair of driving inclined grooves 421a are symmetrically provided on the inner surface of the main body portion 421 of the third driving member 42, and the distance between the same ends of the driving inclined grooves 421a is shorter than the distance between the other ends.

[0068] In Embodiment 3 of the present invention, since the traction member 3" corresponding to the first braking mechanism 1" and the traction member 3" corresponding to the second braking mechanism 2" of the driving mechanism 4 can take the same form, here, the driving mechanism 4 will be described by taking the traction member 3" corresponding to the first braking mechanism 1" as an example.

[0069] As shown in FIG. 30, a drive pin 31” is connected to one end of the drive mechanism 4 of the traction member 3”. The drive pin 31” is provided axially slidably along the central axis of the frame F inside a segment that supports the drive mechanism 4 of the frame F. The drive pin 31” includes a slide shaft 31a” perpendicular to its own central axis. A long hole extending in the central axis direction of the frame F is opened in the support segment of the frame F. The slide shaft 31a” is slidably inserted into the long hole and also inserted into the drive inclined groove 421a, and slides the drive pin 31” through the drive inclined groove 41a when the third drive member 42 pivots. By providing the drive inclined groove 421a, the drive inclined groove 421a can convert the torsional force when the third drive member 42 pivots into an axial tensile force on the drive pin 31”. Thereby, the drive pin 31” pulls the traction member 3”, and further pulls the first braking mechanism 1” through the traction member 3” to achieve the purpose of locking the first wheel 101”. The third drive member 42 can drive and slide two drive pins 31” simultaneously, thereby driving the first braking mechanism 1” and the second braking mechanism 2” simultaneously.

[0070] Of course, the present invention is not limited to this. The drive mechanism 4 driving the first braking mechanism 1” and the second braking mechanism 2” simultaneously through the traction member 3” can adopt other embodiments.

[0071] As shown in FIG. 31, an elastic member 32” is connected between the two drive pins 31”. The elastic member 32” can provide an elastic force to reset the drive pin elastic member 32” so that the drive pin elastic member 32” can operate repeatedly. For example, the elastic member 32” may be a compression spring. When the two drive pins 31” are driven by the third drive member 42 and approach each other, the elastic member 32” is compressed.

[0072] Next, with reference to FIGS. 30, 33, and 34, an example of how the first braking mechanism 1” and the second braking mechanism 2” in Embodiment 3 of the present invention lock or unlock the first wheel 101” and the second wheel 102” by driving the traction member 3” will be described.

[0073] In this embodiment, since the first braking mechanism 1” and the second braking mechanism 2” can have the same configuration, only the first braking mechanism 1” will be described as an example here.

[0074] As shown in FIGS. 30 and 33, the first braking mechanism 1” includes a lock member 11”, a bushing 13”, an elastic reset member 14”, and a lock groove structure 15” in which a plurality of circumferential lock grooves 151” are arranged on the axle of the first wheel 101”.

[0075] As shown in FIG. 34, the bushing 13” has a hollow structure with an opening on the side, has a traction portion 131” on its upper wall, is used to connect to the traction member 3”, and has a through inclined groove 132” on its side wall, which is used to drive the lock member 11”.

[0076] The lock member 11” includes a first shaft and a second shaft that form a T-shaped structure. The first shaft is provided in the bushing 13” and can enter or protrude from the bushing 13”. The end of the first shaft located inside the bushing 13” includes a slide pin 111” that penetrates the through inclined groove 132” on the side wall of the bushing 13”. Thus, when the bushing 13” is pulled upward by the traction member 3”, the through inclined groove 132” moves the slide pin 111” laterally, and at least a part of the first shaft of the lock member 11” protrudes from the bushing 13”. As the first shaft protrudes from the bushing 13”, the second shaft engages with one of the lock grooves 151” in the lock groove structure 15” to lock the first wheel 101”.

[0077] The elastic reset member 14” is located between the lock member 11” and the slide bushing 13”, and provides an elastic force for the first shaft of the lock member 11” to enter the slide bushing 13”. The elastic reset member 14” may be, for example, a tension spring or an elastic belt. After the first shaft of the lock member 11” protrudes from the bushing 13”, the elastic reset member 14” is pressed. When the slide bushing 13” is no longer pulled by the traction member 3”, the first shaft of the lock member 11” returns into the slide bushing 13” under the action of the elastic reset member 14”, and the second shaft disengages from the lock groove 151” in the lock groove structure 15” as the first shaft returns to the slide bushing 13”, unlocking the first wheel 101”. At the same time, the slide pin 111” on the first shaft is driven in the reverse direction of the through inclined groove 132”, and the slide bushing 13” moves downward.

[0078] It should be noted that the first braking mechanism 1” and the second braking mechanism 2” in Embodiment 3 of the present invention are not limited to the above embodiments, and the configuration of the second braking mechanism according to Embodiment 2 of the present invention may also be adopted.

[0079] What is disclosed above is only a preferred example of the present invention, and of course, the scope of the present invention cannot be limited thereby. Therefore, equivalent changes according to the disclosure scope of this application still belong to the scope covered by the present invention.

Explanation of Reference Numerals

[0080] 1, 1' First braking mechanism 2, 2' Second braking mechanism 3, 3' Traction member 11, 11' First shaft pin 12, 12' First driving member 13, 14' First elastic member 13' Engagement hook 21 Second shaft pin 22 Second driving member 23 Second elastic member 24 Second operating member 25 Third elastic member Wheel group braking device for strollers 100, 100' 101 First rear wheel 102 Second rear wheel 103 First rear wheel seat 104 Second rear wheel seat 121 First drive slope 121' First guide groove 122, 223 Lock position 122' Second guide groove 123, 124', 224 Unlock position 123' Engagement position 124 Arc-shaped guide hole 125 First operating member 125' Third guide groove 126' Fourth guide groove 127' First drive slope 128' Pedal 129' Guide slope 221 Drive inclined hole 222 Second drive slope 241 Shaft pin 1031 Fixed hole Wheel group braking device for stroller 100” F Frame 101” First wheel 102” Second wheel 1” First braking mechanism 11” Locking member 13” Bushing 131” Traction part 132” Through inclined groove 14” Elastic reset member 15” Lock groove structure 151” Lock groove 2” Second braking mechanism 3” Traction member 31” Drive pin 31a” Slide shaft 32” Elastic member 4 Driving mechanism 41 Fixed seat 42 Third driving member 421 Body part 421a Driving inclined groove 422 Third operating member 423 Guide side surface 423a First guide groove 423b Second guide groove 423c Engagement groove 423c1 Recess 423c21, 423c22 Two segments of the engagement groove 423d Lock release groove 43 Engagement torsion spring 431 Fixed part 432 Torsion spring head 433 Fixed torsion spring head 44 Reset torsion spring 441 First end of the reset torsion spring 442 Second end of the reset torsion spring

Claims

1. A wheel group braking device for a stroller including a first braking mechanism, a second braking mechanism, and a traction member, the first braking mechanism is provided on a first wheel of the stroller and is used to lock or unlock the first wheel, the second braking mechanism is provided on a second wheel of the stroller and is used to lock or unlock the second wheel, and the traction member is connected between the first braking mechanism and the second braking mechanism to interlock the first braking mechanism and the second braking mechanism with each other when locking or unlocking; The wheel group braking device further includes an operating member for locking or unlocking, the operating member being a single member that functions as a member for locking or unlocking, or, when a plurality of operating members are provided, the operating members are arranged at different positions, the first braking mechanism includes a first axle pin and a first drive member driving the first axle pin, the first axle pin locking or unlocking the first wheel; the second braking mechanism includes a second axle pin and a second drive member driving the second axle pin, the second axle pin locking or unlocking the second wheel; the traction member is connected between the first drive member and the second drive member; The first driving member is rotatably provided, and a first driving slope is provided on a side surface of the first driving member. The first braking mechanism further includes a first elastic member. The first axle pin is slidably provided, and when the first driving member rotates, the first axle pin is inserted into the first wheel by the pressure of the first driving slope, or is retracted from the first wheel by the elastic force of the first elastic member. The direction of operation when locked is the same as the direction of operation when unlocked, the first braking mechanism further includes an engagement hook, the first driving member is provided with a first guide groove and a second guide groove, an engagement position and an unlocking position are provided between the first guide groove and the second guide groove, a first end of the engagement hook is fixed to a frame of the stroller, and a second end of the engagement hook is slidably provided in one of the first guide groove and the second guide groove, when the first driving member rotates and the first axle pin presses the first wheel to lock, the engagement hook slides from the first guide groove to the engagement position, and when the first driving member rotates and the first axle pin presses the first wheel to unlock, the engagement hook slides from the engagement position to the unlocking position. A wheel group braking device for a stroller.

2. When the first brake mechanism locks the first wheel, the second brake mechanism drives the second brake mechanism via the traction member to lock the second wheel, and when the second brake mechanism unlocks the second wheel, the first brake mechanism drives the first brake mechanism via the traction member to unlock the first wheel.

2. The wheel group braking device for a stroller according to claim 1.

3. A lock position is provided at one end of the first drive slope, and an unlock position is provided at the other end.

2. The wheel group braking device for a stroller according to claim 1.

4. The first driving member is provided with an arc-shaped guide hole for guiding the rotation of the first driving member.

4. The stroller wheel group braking device according to claim 1, wherein the wheel group braking device is a brake for a stroller.

5. The first drive member is provided with a first operating member for driving the rotation of the first drive member.

5. The stroller wheel group braking device according to claim 1,

6. the second driving member is rotatably provided, and a second driving slope is provided on a side surface of the second driving member; the second braking mechanism further includes a second elastic member; the second axle pin is slidably provided, and when the second driving member rotates, the second axle pin is inserted into the second wheel by the pressure of the second driving slope, or is retracted from the second wheel by the elastic force of the second elastic member; 6. The stroller wheel group braking device according to claim 1,

7. a drive inclined hole is provided in the second drive member, and the second brake mechanism further includes a third elastic member and a second operating member, the second operating member having an axle pin, the axle pin being slidably inserted into the drive inclined hole, and the third elastic member providing an elastic force for resetting the second drive member.

7. The wheel group braking device for a stroller according to claim 6.

8. A lock position is provided at one end of the second drive ramp, and an unlock position is provided at the other end.

8. The wheel group braking device for a stroller according to claim 6 or 7.

9. When the first brake mechanism locks the first wheel, the second brake mechanism drives the second brake mechanism to lock the second wheel, and when the first brake mechanism unlocks the first wheel, the second brake mechanism drives the second brake mechanism to unlock the second wheel.

9. The stroller wheel group braking device according to claim 1,

10. A fixing hole is provided in the frame of the stroller, and the first end of the engagement hook is connected to the fixing hole.

2. The wheel group braking device for a stroller according to claim 1.

11. The first driving member is further provided with a third guide groove and a fourth guide groove, both ends of the third guide groove are connected to the first guide groove and the engagement position, and both ends of the fourth guide groove are connected to the engagement position and the second guide groove.

11. The wheel group braking device for a stroller according to claim 1 or 10.

12. A guide slope that allows the engagement hook to slide into the second guide groove is provided between the fourth guide groove and the second guide groove. The wheel group braking device for a stroller according to claim 11.

13. The wheel group braking device of the stroller further includes a drive mechanism provided on a frame of the stroller, the drive mechanism being connected to the first brake mechanism and the second brake mechanism via the traction member, and when the drive mechanism is operated, the first brake mechanism and the second brake mechanism are driven via the traction member to lock the first wheel and the second wheel, or the first brake mechanism and the second brake mechanism are driven via the traction member to unlock the first wheel and the second wheel.

13. The stroller wheel group braking device according to claim 1.

14. the drive mechanism includes a fixed seat, a third drive member, an engagement torsion spring, and a reset torsion spring; The fixed seat is provided on a frame of the stroller, a main body portion of the third driving member is rotatably provided on the fixed seat, a third operating member extends from the main body portion, the main body portion of the third driving member includes a guide side surface and has an annular groove on the guide side surface, the annular groove has an engagement groove, the engaging torsion spring includes a fixed portion and a torsion spring head extending from the fixed portion, the fixed portion is fixed to the fixed seat, the torsion spring head is slidably provided in the annular groove, when the third driving member pivots along a first direction to drive the first braking mechanism and the second braking mechanism via the traction member to lock the first wheel and the second wheel, the torsion spring head slides along the annular groove and abuts against the engaging groove, when the third driving member pivots along a second direction opposite to the first direction to drive the first braking mechanism and the second braking mechanism via the traction member to unlock the first wheel and the second wheel, the torsion spring head moves away from the engaging groove along the annular groove, a first end of the reset torsion spring is fixed to the fixed seat, and a second end of the reset torsion spring is fixed to a body portion of the third driving member; 14. The wheel group braking device for a stroller according to claim 13.

15. the annular groove includes a first guide groove and a second guide groove, the engagement groove and the lock release groove are provided between the first guide groove and the second guide groove, and when the third driving member is located at an initial position, the torsion spring head is located in the lock release groove; 15. The wheel group braking device for a stroller according to claim 14.

16. an angle between the first guide groove and the unlocking groove is greater than 90°, and an angle between the second guide groove and the engagement groove is greater than 90°; 16. The wheel group braking device for a stroller according to claim 15.

17. a bottom surface of at least one of the first guide groove, the engagement groove, the second guide groove, and the lock release groove is gradually raised from one end to the other end of the groove in a counterclockwise direction, thereby forming a step structure between the bottom surfaces of at least two adjacent grooves of the first guide groove, the engagement groove, the second guide groove, and the lock release groove; 17. The wheel group braking device for a stroller according to claim 15 or 16.

18. The engagement groove is divided into two segments along the extending direction of the groove, and a step structure is formed between bottom surfaces of the two segments, and the bottom surface of the segment closer to the first guide groove is higher than the bottom surface of the segment closer to the second guide groove. The stroller wheel group braking device according to any one of claims 15 to 17.

19. The inner wall of the engagement groove includes a recess for positioning the torsion spring head. The stroller wheel group braking device according to any one of claims 14 to 18.

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