Foldable and movable carrier

Abstract

To provide a foldable and movable carrier which can prevent pivoting of the carrier after unintentional release, so as to facilitate the re-locking and re-fixing of the movable carrier.SOLUTION: A foldable and movable carrier includes a locking mechanism 400, a first rod 100, and a second rod 300. The locking mechanism has a locked state and an unlocked state. The first rod is provided with a first mating portion. The second rod is pivotally connected to the first rod, and the second rod is provided with a second mating portion 301 detachably mating with the first mating portion. When the locking mechanism is in the locked state, the first rod and the second rod are relatively fixed. When the locking mechanism is in the unlocked state, if the first mating portion mates with the second mating portion, the first rod and the second rod are relatively fixed, and if the first mating portion and the second mating portion are released from mating, the first rod rotates relative to the second rod so as to fold or unfold the movable carrier.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] This application relates to the technical field of carriers, and more particularly to foldable movable carriers.

Background Art

[0002] Rotatable and foldable carriers such as foldable strollers are easy to store and transport, but also prone to potential safety hazards. According to the test requirements of the European standard EN1888-1:2018 (Test specifications for folding systems for ease of storage or transport - 8.3.5.1), at least two separate and independent manual operating devices are required to meet the following conditions: when any one of the operating devices is released, the operating device automatically returns to its original state and the locking device locks again. However, in currently commercially available strollers, for example, when the locking mechanism on the handle of the stroller is accidentally pressed, the handle rotates to a certain extent under the action of the child's weight or its own gravity, so that the locking mechanism cannot return to the locked position, thereby causing a specific safety hazard to the child in the stroller.

Summary of the Invention

[0003] Therefore, a foldable movable carrier is provided that can prevent the rotation of the carrier after accidental release of the locking mechanism and facilitate the re-locking and re-fixing of the movable carrier.

[0004] According to one aspect of the present application, a foldable movable carrier is provided, the carrier comprising: a locking mechanism having a locked state and an unlocked state; a first rod provided with a first fitting portion; a second rod rotatably connected to the first rod and provided with a second fitting portion that detachably fits with the first fitting portion; and When the locking mechanism is in the locked state, the first rod and the second rod are relatively fixed. When the locking mechanism is in the unlocked state, if the first fitting portion fits with the second fitting portion, the first rod and the second rod are relatively fixed. When the first fitting portion and the second fitting portion are disengaged from the fit, the first rod can rotate relative to the second rod so as to fold or deploy the movable carrier.

[0005] In this folding movable carrier, when the locking mechanism is unintentionally unlocked, since the first fitting portion and the second fitting portion are in the fitted state, the first rod rotatably connected to the second rod cannot rotate. Thereby, the user can reset the locking mechanism, and thus, the first rod can be returned to the locked state, as a result, the safety of the entire folding movable carrier can be improved. Further, when it is actually necessary to release the lock, the locking mechanism can be pressed. For example, by applying a specific external force, the first fitting portion and the second fitting portion can be disengaged from the fit, thereby rotating the first rod to fold it with respect to the second rod, ensuring the realization of the foldable function of the movable carrier.

[0006] In one embodiment, the first fitting portion is a male connection portion, and the second fitting portion is a female connection portion that can be detachably fitted with the male connection portion. Alternatively, the first fitting portion is a female connection portion, and the second fitting portion is a male connection portion that can be detachably fitted with the female connection portion.

[0007] In one embodiment, one of the first fitting portion and the second fitting portion is an engaging groove, and the other of the first fitting portion and the second fitting portion is an engaging protrusion that can engage with the engaging groove.

[0008] In one embodiment, the engaging groove is a V-shaped groove. The V-shaped groove includes a first groove wall and a second groove wall arranged in a V shape. The engaging protrusion is an arc-shaped protrusion that can contact the first groove wall and the second groove wall.

[0009] In one embodiment, the included angle between the first groove wall and the plane where the opening of the V-shaped groove is located is in the range of 40° to 50°. The included angle between the second groove wall and the plane where the opening of the V-shaped groove is located is in the range of 40° to 50°. The height of the arc-shaped protrusion is in the range of 1.5 mm to 2.5 mm.

[0010] In one embodiment, the engaging protrusion is a serrated protrusion having at least two engaging teeth. The engaging groove is a serrated groove having at least two engaging grooves. At least two engaging teeth can be respectively engaged with at least two engaging grooves.

[0011] In one embodiment, one of the first fitting portion and the second fitting portion is a plug hole, and the other of the first fitting portion and the second fitting portion is a plug pin that can be inserted into the plug hole.

[0012] In one embodiment, the hole wall of the plug hole is elastically deformable. When the hole wall of the plug hole is elastically deformed, the inner diameter of the plug hole is larger than the diameter of the plug pin. When the hole wall of the plug hole returns to its original shape, the inner diameter of the plug hole is smaller than the diameter of the plug pin. Or, the plug pin is elastically deformable. When the plug pin is elastically deformed, the diameter of the plug pin is smaller than the inner diameter of the plug hole. When the plug pin returns to its original state, the diameter of the plug pin is larger than the inner diameter of the plug hole.

[0013] In one embodiment, the foldable movable carrier further includes a third rod. The first rod has a first position, a second position, and a third position that are sequentially spaced apart in the extending direction of the first rod. The first fitting portion is disposed at the third position. The third rod is rotatably connected to the first rod at the first position via a locking mechanism. When the locking mechanism is in the locked state, the first rod and the third rod are relatively fixed. When the locking mechanism is in the unlocked state, the first rod can rotate relative to the third rod so as to fold or unfold the movable carrier. The second rod is rotatably connected to the first rod at the second position.

[0014] In one of the embodiments, a first rotating sector is provided at an end of the first rod. A second rotating sector is provided at an end of the second rod. The first rotating sector faces the second rotating sector. The second position is disposed at the center of the circle of the first rotating sector. The center of the circle of the second rotating sector is rotatably connected to the first rotating sector at the second position. The first fitting portion is disposed at a periphery of a surface of the first rotating sector facing the second rotating sector. The second fitting portion is disposed at a periphery of a surface of the second rotating sector facing the first rotating sector.

[0015] In one of the embodiments, the stopper is disposed on a side of the second rotating sector close to the third rod. When the first rod and the second rod are disposed at a second preset included angle, the first rotating sector abuts against the stopper.

[0016] In one of the embodiments, the locking mechanism a first locking shell fixed to the first rod and including a first locking groove; a second locking shell fixed to the third rod and having a second locking groove; a locking member having at least two locking teeth disposed at a predetermined angle, wherein the shapes of the first locking groove and the second locking groove are adapted to the shape of the locking member, the locking member has a locked state and an unlocked state, and when the locking member is in the locked state, the locking member is disposed on both the first locking shell and the second locking shell to limit the rotation of the second locking shell relative to the first locking shell, and when the locking member is in the unlocked state, the locking member is withdrawn from the first locking groove or the second locking groove so that the second locking shell can rotate relative to the first locking shell, the locking member; an elastic member operably connected to the locking member to maintain the locking member in the locked state; a release member operably connected to the locking member to drive the locking member to move against the elastic force of the elastic member to switch the locking member from the locked state to the unlocked state; and includes.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Description of Reference Numerals

[0018] 100 First rod 101 First fitting portion 110 First position 120 Second position 130 Third position 140 First rotation sector 141 Arc-shaped guide groove 150 Engagement groove 151 First groove wall 152 Second groove wall 200 Third rod 300 Second rod 301 Second fitting portion 310 Second rotation sector 311 Arc-shaped guide rib 312 Stopper 320 Engagement protrusion 400 Locking mechanism 410 First locking shell 411 First locking groove 420 Elastic member 430 Locking member 431 Locking teeth 440 Second locking shell 441 Through hole 442 Second locking groove 450 Release member 451 Pressing part 20 Handle 30 Front support 40 Rear support

Mode for Carrying Out the Invention

[0019] As shown in FIGS. 1 to 2, one embodiment of the present application provides a foldable movable carrier. The foldable movable carrier includes a first rod 100, a third rod 200, and a second rod 300. In this embodiment, the carrier may be a roller. The roller includes a handle 20, a front support 30, and a rear support 40. In this embodiment, the first rod 100, the third rod 200, and the second rod 300 are all hollow rods, and are respectively sleeved at the end of the handle 20, the end of the rear support 40, and the end of the front support 30. Certainly, in other embodiments, the first rod 100, the third rod 200, and the second rod 300 may be respectively connected to the handle 20, the rear support 40, and the front support 30 by other means. Or, the first rod 100, the third rod 200, and the second rod 300 are respectively formed as a part of the handle 20, a part of the rear support 40, and a part of the front support 30. In short, if the handle 20, the front support 30, and the rear support 40 can be driven to move by the movement of the first rod 100, the third rod 200, and the second rod 300, the present application can be achieved. The foldable movable carrier 10 can prevent the handle 20 of the roller from rotating after the locking mechanism 400 is accidentally released, so that the roller can be re-locked and the safety performance of the roller can be improved.

[0020] Specifically, as shown in FIGS. 2 and 7, the first rod 100 includes a first position 110, a second position 120, and a third position 130 that are sequentially spaced apart in the extending direction of the first rod 100. It should be noted that the structure of the movable carrier of this application is not limited to this specification. In this embodiment, the first rod 100 is sleeved at the lower end of the handle 20. Certainly, the first rod 100 can also be connected to the lower end of the handle 20, or can be formed as a part of the lower end of the handle 20. The first fitting portion 101 is disposed at the third position 130.

[0021] The third rod 200 is rotatably connected to the first rod 100 at the first position 110 via a locking mechanism 400. The locking mechanism 400 has a locked state and an unlocked state. When the locking mechanism 400 is in the locked state, the first rod 100 and the third rod 200 are relatively fixed and arranged at a preset first included angle. When the locking mechanism 400 is in the unlocked state, the first rod 100 is rotatable with respect to the third rod 200. In this embodiment, the third rod 200 is sleeved at the upper end of the rear support 40. Certainly, the third rod 200 can also be connected to the upper end of the rear support 40, or can be formed as a part of the upper end of the rear support 40 by other means. In this embodiment, the preset first included angle is an acute angle.

[0022] In this embodiment, as shown in FIGS. 4 to 6, the locking mechanism 400 includes a first locking shell 410, an elastic member 420, a locking member 430, a second locking shell 440, and a release member 450, which are arranged in this order. The first locking shell 410 is fixed to the first rod 100 or is a part of the first rod 100. The first locking shell 410 includes a first locking groove 411. The second locking shell 440 is fixed to the third rod 200 or is formed as a part of the third rod 200. The second locking shell 440 includes a second locking groove 442. The locking member 430 includes at least two locking teeth 431 arranged at a predetermined angle. The shapes of both the first locking groove 411 and the second locking groove 442 are adapted to the shape of the locking member 430. In this embodiment, the locking member 430 is a gear-shaped locking member 430. Both the first locking groove 411 and the second locking groove 442 are gear-shaped locking grooves that fit into the gear-shaped locking member 430. The locking member 430 has a locked state and an unlocked state. When the locking member 430 is in the locked state, the locking member 430 is disposed between both the first locking shell 410 and the second locking shell 440 to restrict the rotation of the second locking shell 440 relative to the first locking shell 410. When the locking member 430 is in the unlocked state, the locking member 430 is withdrawn from the first locking groove 411 or the second locking groove 442 so that the second locking shell 440 can rotate relative to the first locking shell 410. The elastic member 420 is operably connected to the locking member 430 to maintain the locking member 430 in the locked state. In this embodiment, the elastic member 420 is a spring. Both ends of the spring abut against the first locking shell 410 and the locking member 430, respectively. The release member 450 is operably connected to the locking member 430 to drive the locking member 430 to move against the elastic force of the elastic member 420 and switch the locking member 430 from the locked state to the unlocked state. In this embodiment, the release member 450 is a release button. The release button is provided with a pressing portion 451. The second locking shell 440 is provided with a through hole 441 through which the pressing portion 451 can pass.

[0023] Thus, when the release member 450 is not pressed and the locking member 430 is in the locked state, the locking member 430 is locked to both the first locking shell 410 and the second locking shell 440 by the elastic force of the elastic member 420 which is a return spring. In this case, the first locking shell 410 and the second locking shell 440 are in the locked state, that is, the first rod 100 and the third rod 200 are in the locked state. When the release member 450 is pressed, the pressing portion 451 can pass through the through hole 441 and press the second locking shell 440 and the locking member 430, whereby the locking member 430 is separated from the first locking groove 411 or the second locking groove 442. In this case, the first locking shell 410 and the second locking shell 440 are in the released state, that is, the first rod 100 is rotatable relative to the third rod 200. The locking mechanism 400 has a simple structure and can enable the first rod 100 and the third rod 200 to switch between the locked state and the unlocked state. However, when the release member 450 is unintentionally pressed, the first rod 100 will rotate under the action of an external force or its own gravity. As a result, the locking teeth 431 of the locking member 430 are displaced from the first locking groove 411 or the second locking groove 442, and thus it is difficult for the locking member 430 to re-engage with the first locking groove 411 or the second locking groove 442 so that the first locking shell 410 and the second locking shell 440 return to the locked state again. That is, it is difficult to relatively lock and fix the first rod 100 and the third rod 200 again.

[0024] The second rod 300 is rotatably connected to the first rod 100 at the second position 120. The second rod 300 is provided with a second fitting portion 301 that detachably fits with the first fitting portion 101. When the first fitting portion 101 fits with the second fitting portion 301, the first rod 100 and the second rod 300 are relatively fixed and arranged at a second preset included angle. When the fitting between the first fitting portion 101 and the second fitting portion 301 is released, the first rod 100 can rotate relative to the second rod 300, and the included angle facing the third rod 200 between the first rod 100 and the second rod 300 is equal to or less than the second preset included angle. In this embodiment, the second preset included angle is 180 degrees. Thus, when the first fitting portion 101 fits with the second fitting portion 301, the first rod 100 and the second rod 300 are on the same straight line. Also, since the first preset included angle is an acute angle, when the locking mechanism 400 is in the locked state, the combined structure of the first rod 100, the second rod 300, and the third rod 200 forms a triangular support structure. Further, since the included angle facing the third rod 200 between the first rod 100 and the second rod 300 is always kept equal to or less than the second preset included angle, that is, when the locking mechanism 400 is in the locked state, the first rod 100 cannot rotate from the third rod 200 to the second rod 300 or from the second rod 300 to the third rod 200. Therefore, when the locking mechanism 400 is in the locked state, the first rod 100 and the second rod 300 can be kept at the first preset included angle, thereby providing a stable triangular support structure for the entire stroller.

[0025] In this way, when the locking mechanism 400 is in the locked state, the first rod 100, the second rod 300, and the third rod 200 form a stable triangular support structure, so that the first rod 100 and the second rod 300 are relatively fixed, and the first rod 100 and the third rod 200 are also relatively fixed. When the locking mechanism 400 is unintentionally pressed and unlocked, since the first fitting portion 101 that fits with the second fitting portion 301 of the second rod 300 is disposed at the third position 130 of the first rod 100, the first fitting portion 101 fits with the second fitting portion 301, and the first rod 100 and the second rod 300 remain relatively fixed, and the first rod 100 does not rotate. As a result, the locking mechanism 400 cannot be returned to the locked state, and it is possible to prevent the first rod 100 from rotating in an unintended unlocked state where the first rod 100 and the second rod 300 cannot be locked and fixed. When it is necessary to fold the foldable movable carrier 10, the locking mechanism 400 is unlocked, and at the same time a specific external force is applied to the first rod 100, whereby the fitting between the first fitting portion 101 and the second fitting portion 301 is released. Thereby, the relative fixed state of the first rod 100, the third rod 200, and the second rod 300 is released, and the foldable movable carrier 10 can be folded.

[0026] In one embodiment, as shown in FIGS. 4 to 7, a first rotating sector 140 is provided at the lower end of the first rod 100, and a second rotating sector 310 is provided at the upper end of the second rod 300. The second position 120 is disposed at the center of the circle of the first rotating sector 140. The center of the circle of the second rotating sector 310 is rotatably connected to the first rotating sector 140 (i.e., the center of the circle of the first rotating sector 140) at the second position 120. On the surface of the first rotating sector 140 facing the second rotating sector 310, at least two arc-shaped guide grooves 141 concentric with the first rotating sector 140 are provided. On the surface of the second rotating sector 310 facing the first rotating sector 140, at least two arc-shaped guide ribs 311 concentric with the second rotating sector 310 are provided. The arc-shaped guide ribs 311 are fitted in one-to-one correspondence with the arc-shaped guide grooves 141 to guide the rotation of the first rod 100 and the second rod 300 and facilitate the folding of the movable carrier. It can be understood that the positions of the arc-shaped guide grooves 141 and the arc-shaped guide ribs 311 are interchangeable.

[0027] In one embodiment, as shown in FIGS. 6 and 7, the first fitting portion 101 is disposed at the periphery of the surface of the first rotating sector 140 facing the second rotating sector 310, and the second fitting portion 301 is disposed at the periphery of the surface of the second rotating sector 310 facing the first rotating sector 140. Thus, the distance from the second position 120 to the third position 130 is relatively large. According to the lever principle, when the movable carrier is folded, the external force that needs to be applied to release the fitting between the first fitting portion 101 and the second fitting portion 301 is smaller, which means that less labor is required when the movable carrier is folded. Of course, the positions of the first fitting portion 101 and the second fitting portion 301 can also be arranged according to actual needs. For example, the first fitting portion 101 and the second fitting portion 301 can be arranged closer to the center of the circle of the first rotating sector 140 and the center of the circle of the second rotating sector 310, respectively. As a result, when the locking mechanism 400 is accidentally released, for example, the first rod 100 becomes more difficult to rotate, but this is not limited to this specification.

[0028] Also, a stopper 312 is disposed on the side of the second rotary sector 310 close to the third rod 200. When the first rod 100 and the second rod 300 are arranged at a second preset included angle, the first rotary sector 140 abuts against the stopper 312. The stopper 312 may be a stop projection, a stop slope, or the like. In the present embodiment, the stopper 312 is a stop slope disposed on the periphery of the surface of the second rotary sector 310 facing the first rotary sector 140, and the stop slope gradually rises in a direction approaching the third rod 200. In this way, the included angle facing the third rod 200 between the first rod 100 and the second rod 300 can always be made not more than the second preset included angle.

[0029] Optionally, the first fitting portion 101 is a male connection portion, and the second fitting portion 301 is a female connection portion detachably engageable with the male connection portion. Alternatively, the first fitting portion 101 is a female connection portion, and the second fitting portion 301 is a male connection portion detachably engageable with the female connection portion.

[0030] In one embodiment, as shown in FIGS. 6 and 7, the first fitting portion 101 is an engaging groove 150, and the second fitting portion 301 is an engaging projection 320 engageable with the engaging groove 150. In this way, when the locking mechanism 400 is unintentionally unlocked, the engaging projection 320 of the second rod 300 engages with the engaging groove 150 of the first rod 100, so that it is difficult for the first rod 100 to rotate under the action of an external force or its own weight. Thereby, the locking mechanism 400 can be returned to the locked state again, and the movable carrier can be re-locked and re-fixed. When it is necessary to fold the movable carrier, it is only necessary to apply a certain external force to the first rod 100 to rotate the engaging projection 320 out of the engaging groove 150, and the folding function of the movable carrier is ensured. It can be understood that the first fitting portion 101 may be the engaging projection 320, and the second fitting portion 301 may be the engaging groove 150 engageable with the engaging projection 320.

[0031] In this embodiment, the engagement groove 150 is disposed at the periphery of the surface of the first rotating sector 140 facing the second rotating sector 310, and the engagement protrusion 320 is disposed at the periphery of the surface of the second rotating sector 310 facing the first rotating sector 140. Certainly, in other embodiments, the engagement groove 150 may also be disposed at other positions of the first rotating sector 140, and the engagement protrusion 320 may also be disposed at other positions of the second rotating sector 310.

[0032] Also, as shown in FIG. 3, the engagement groove 150 is a V-shaped groove. The V-shaped groove includes a first groove wall 151 and a second groove wall 152 arranged in a V shape. The engagement protrusion 320 is an arc-shaped protrusion capable of contacting the groove walls of the V-shaped groove. That is, the cross-sectional shape of the engagement groove 150 perpendicular to the first rod 100 is V-shaped, and the cross-sectional shape of the engagement protrusion 320 perpendicular to the third rod 200 is arc-shaped. Thereby, when the first rod 100 rotates and engages with the third rod 200 and is fixed, the engagement protrusion 320 can be smoothly engaged with the engagement groove 150. When the fixation between the first rod 100 and the third rod 200 is released, the engagement protrusion 320 can also easily rotate and come out of the engagement groove 150. Optionally, the first included angle between the first groove wall 151 and the plane where the opening of the V-shaped groove is located is within the range of 40° to 50°. In this embodiment, the first included angle is 45°. The second included angle between the second groove wall 152 and the plane where the opening of the V-shaped groove is located is in the range of 40° to 50°. In this embodiment, the second included angle is 45°. The height of the arc-shaped protrusion is in the range of 1.5 mm to 2.5 mm. In this embodiment, the height is 2 mm. With the above configuration, even when the locking mechanism 400 is unintentionally released during the rotation of the first rod 100, it is possible to prevent the realization of the foldable function of the movable carrier from being affected.

[0033] Further, the engaging protrusion 320 is a serrated protrusion having at least two engaging teeth, and the engaging groove 150 is a serrated groove including at least two engaging grooves. The at least two engaging teeth can be respectively fitted into the at least two engaging grooves. Compared with the fitting between a single protrusion and a groove, the fitting structure between the serrated protrusion and the serrated groove can provide a greater frictional force. As a result, the first rod 100 has a stronger anti-rotation ability during unintentional unlocking. Certainly, under the condition of the same required anti-rotation ability, the height of the serrated protrusion can be smaller than the height of a single protrusion, and the depth of the corresponding engaging groove 150 can also be smaller than the depth of a single groove.

[0034] In another embodiment, the first fitting portion 101 may be a plug hole, and the second fitting portion 301 may be a plug pin that can be inserted into the plug hole. In this way, when the locking mechanism 400 is unlocked unintentionally, the plug pin of the first rod 100 is inserted into the plug hole of the second rod 300. Therefore, it is difficult for the first rod 100 to rotate under the action of an external force or its own gravity. Thereby, it becomes convenient to return the locking mechanism 400 to the locked state again, and the folding movable carrier 10 can be re-locked and re-fixed. When it is necessary to fold the movable carrier, it is only necessary to apply a certain external force to the first rod 100 to rotate the plug pin outward from the plug hole, thereby ensuring the folding function of the folding movable carrier. It can be understood that the first fitting portion 101 can also be a plug pin, and the second fitting portion 301 can also be a plug hole into which the plug pin can be inserted.

[0035] Also, the hole wall of the plug hole can be elastically deformed. When the hole wall of the plug hole is elastically deformed, the inner diameter of the plug hole is larger than the diameter of the plug pin. When the hole wall of the plug hole returns to its original shape, the inner diameter of the plug hole is smaller than the diameter of the plug pin. Alternatively, the plug pin can be elastically deformed. When the plug pin is elastically deformed, the diameter of the plug pin is smaller than the inner diameter of the plug hole, and when the plug pin returns to its original state, the diameter of the plug pin is larger than the inner diameter of the plug hole. On the one hand, this configuration makes it easier for the plug pin to be inserted into the plug hole and stably holds the plug pin in the plug hole without being easily removed from the plug hole. On the other hand, this configuration is also convenient for the plug pin to come out of the plug hole when an external force is applied.

[0036] Optionally, both the first rod 100 and the second rod 300 are made of a deformable plastic material so as to facilitate the fitting and separation of the first fitting portion 101 and the second fitting portion 301.

[0037] The foldable movable carrier 10 described above has at least the following technical effects.

[0038] When the locking mechanism 400 is unlocked unintentionally, since the first fitting portion 101 and the second fitting portion 301 are in a fitted state, the first rod 100 rotatably connected to the second rod 300 is difficult to rotate. Thereby, the user can reset the locking mechanism 400, and thus the movable carrier can be returned to the locked and fixed state. As a result, the safety of the entire movable carrier can be improved. Further, when it is actually necessary to release the lock, the locking mechanism 400 can be pushed, for example, by applying a specific external force, the first fitting portion 101 and the second fitting portion 301 can be released from the fitting, whereby the first rod 100 can be rotated and folded with respect to the second rod 300, ensuring the realization of the foldable function of the movable carrier.

[0039] The technical features of the foregoing embodiments can be arbitrarily combined. For the sake of simplicity of description, not all possible combinations of the technical features in the above embodiments have been described. However, as long as these combinations of technical features do not conflict with each other, they shall all be included within the scope of this application.

[0040] The foregoing embodiments are merely illustrative of some embodiments of this application, and the description thereof is relatively specific and detailed. However, it should not be understood as a limitation to the patent scope of this application. Those skilled in the art should note that several modifications and improvements can be further made without departing from the concept of this application, and the modifications and improvements are included in the protection scope of this application. Therefore, the protection scope of this application shall be subject to the scope of the appended patent claims.

Claims

1. A foldable movable carrier (10), comprising: a locking mechanism (400) having a locked state and an unlocked state; a first rod (100) provided with a first fitting portion (101); a second rod (300) rotatably connected to the first rod (100) and provided with a second fitting portion (301) that detachably fits with the first fitting portion (101); wherein when the locking mechanism (400) is in the locked state, the first rod (100) and the second rod (300) are relatively fixed; when the locking mechanism (400) is in the unlocked state, when the first fitting portion (101) fits with the second fitting portion (301), the first rod (100) and the second rod (300) are relatively fixed; when the fitting between the first fitting portion (101) and the second fitting portion (301) is released, the first rod (100) is rotatable relative to the second rod (300) so as to fold or unfold the movable carrier (10). A foldable movable carrier (10).

2. The foldable movable carrier (10) according to claim 1, wherein the first fitting portion (101) is a male connection portion, and the second fitting portion (301) is a female connection portion detachably fitted with the male connection portion; or the first fitting portion (101) is a female connection portion, and the second fitting portion (301) is a male connection portion detachably fitted with the female connection portion.

3. The foldable movable carrier (10) according to any one of claims 1 or 2, wherein one of the first fitting portion (101) and the second fitting portion (301) is an engaging groove (150), and the other of the first fitting portion (101) and the second fitting portion (301) is an engaging protrusion (320) engageable with the engaging groove (150).

4. The foldable movable carrier (10) according to claim 3, wherein the engaging groove (150) is a V-shaped groove, the V-shaped groove includes a first groove wall (151) and a second groove wall (152) arranged in a V shape, and the engaging protrusion (320) is an arc-shaped protrusion capable of contacting the first groove wall (151) and the second groove wall (152).

5. The included angle between the first groove wall (151) and the plane where the opening of the V-shaped groove is located is in the range of 40° to 50°, the included angle between the second groove wall (152) and the plane where the opening of the V-shaped groove is located is in the range of 40° to 50°, and the height of the arc-shaped protrusion is in the range of 1.5 mm to 2.5 mm. The foldable movable carrier (10) according to claim 4.

6. The engaging protrusion (320) is a serrated protrusion having at least two engaging teeth, the engaging groove (150) is a serrated groove having at least two engaging grooves, and the at least two engaging teeth can be respectively fitted into the at least two engaging grooves. The foldable movable carrier (10) according to any one of claims 3 to 5.

7. One of the first fitting portion (101) and the second fitting portion (301) is a plug hole, and the other of the first fitting portion (101) and the second fitting portion (301) is a plug pin that can be inserted into the plug hole. The foldable movable carrier (10) according to claim 2.

8. The hole wall of the plug hole is elastically deformable. When the hole wall of the plug hole is elastically deformed, the inner diameter of the plug hole is larger than the diameter of the plug pin. When the hole wall of the plug hole returns to its original shape, the inner diameter of the plug hole is smaller than the diameter of the plug pin, or The plug pin is elastically deformable. When the plug pin is elastically deformed, the diameter of the plug pin is smaller than the inner diameter of the plug hole. When the plug pin returns to its original state, the diameter of the plug pin is larger than the inner diameter of the plug hole. The foldable movable carrier (10) according to claim 7.

9. Further comprising a third rod (200), the first rod (100) has a first position (110), a second position (120), and a third position (130) that are sequentially spaced apart in the extending direction of the first rod (100), the first fitting portion (101) is disposed at the third position (130), the third rod (200) is rotatably connected to the first rod (100) at the first position (110) via the locking mechanism (400), when the locking mechanism (400) is in the locked state, the first rod (100) and the third rod (200) are relatively fixed, when the locking mechanism (400) is in the unlocked state, the first rod (100) is rotatable relative to the third rod (200) so as to fold or deploy the movable carrier (10), the second rod (300) is rotatably connected to the first rod (100) at the second position (120), the foldable movable carrier (10) according to any one of claims 1 to 8.

10. A first rotation sector (140) is provided at an end of the first rod (100), a second rotation sector (310) is provided at an end of the second rod (300), the first rotation sector (140) faces the second rotation sector (310), the second position (120) is disposed at the center of the circle of the first rotation sector (140), the center of the circle of the second rotation sector (310) is rotatably connected to the first rotation sector (140) at the second position (120), the first fitting portion (101) is disposed at the periphery of the surface of the first rotation sector (140) facing the second rotation sector (310), the second fitting portion (301) is disposed at the periphery of the surface of the second rotation sector (310) facing the first rotation sector (140), the foldable movable carrier (10) according to claim 9.

11. A stopper (312) is disposed on the side of the second rotation sector (310) close to the third rod (200), when the first rod (100) and the second rod (300) are disposed at a second preset included angle, the first rotation sector (140) abuts against the stopper (312), the foldable movable carrier (10) according to claim 10.

12. The locking mechanism (400) is A first locking shell (410) fixed on the first rod (100) and having a first locking groove (411); A second locking shell (440) fixed to the third rod (200) and having a second locking groove (442); A locking member (430) having at least two locking teeth (431) arranged at a predetermined angle, wherein the shapes of the first locking groove (411) and the second locking groove (442) are adapted to the shape of the locking member (430), the locking member (430) has a locked state and an unlocked state, and when the locking member (430) is in the locked state, the locking member (430) is disposed on both the first locking shell (410) and the second locking shell (440) to limit the rotation of the second locking shell (440) relative to the first locking shell (410), and when the locking member (430) is in the unlocked state, the locking member (430) is withdrawn from the first locking groove (411) or the second locking groove (442) so that the second locking shell (440) can rotate relative to the first locking shell (410), a locking member (430); An elastic member (420) operably connected to the locking member (430) to maintain the locking member (430) in the locked state; A release member (450) operably connected to the locking member (430) to drive the locking member (430) to move against the elastic force of the elastic member (420) to switch the locking member (430) from the locked state to the unlocked state; The foldable movable carrier (10) according to any one of claims 9 to 11, comprising.

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