CN111994163A - Rotatable and lockable movable joint - Google Patents
Rotatable and lockable movable joint Download PDFInfo
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- CN111994163A CN111994163A CN202010982909.7A CN202010982909A CN111994163A CN 111994163 A CN111994163 A CN 111994163A CN 202010982909 A CN202010982909 A CN 202010982909A CN 111994163 A CN111994163 A CN 111994163A
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- connecting piece
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- plugging
- inner core
- rotatable
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- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000005060 rubber Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 238000013016 damping Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- 238000003756 stirring Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
- B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
- B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
- B62B7/08—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis
- B62B7/086—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis becoming smaller in all three dimensions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
- B62B2205/20—Catches; Locking or releasing an articulation
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention belongs to the technical field of accessories of a baby carriage, and particularly relates to a rotatable and lockable movable joint which comprises a first connecting piece, a second connecting piece and a movable limiting device, wherein the movable limiting device is connected between the first connecting piece and the second connecting piece, and the movable limiting device is axially displaced during rotation so as to realize rotation and locking of the second connecting piece. The rotatable and lockable mobile joint of the present invention has two states. The support state is used, and the storage state is used. When the unlocking mechanism is applied to a baby carriage, unlocking can be realized by rotating the movable limiting device, the baby carriage is convenient to store, a button does not need to be pressed during unlocking, force is generated by a user, and the operation difficulty can be reduced; in addition, the torque force applied to the knob by an operator cannot cause the side surface or front and back stress of the frame, so that the side turning or front and back movement of the baby carriage in the unlocking process can be avoided.
Description
Technical Field
The invention belongs to the technical field of accessories of a baby carriage, and particularly relates to a movable joint capable of rotating and locking.
Background
A stroller is a tool vehicle designed to facilitate outdoor activities of a baby. In order to save space when the stroller is stored, the frame of a typical stroller is designed to be rotatable and foldable, and the rotation and folding are controlled by means of a movable joint. The existing movable joint is unlocked by pressing a button when in use, the button is pressed on one side, the buttons are pressed on two sides simultaneously, after the buttons are pressed or pushed, the frame is unfolded or folded, the operation mode needs an operator to apply great pressure or thrust to the buttons, the operation difficulty is high, and the operation mode is particularly not friendly to female users with small hand strength. In addition, the buttons pressed on the two sides need to be pressed on the two sides at the same time, so that the operation difficulty is high; the button that unilateral was pressed, pressure can transmit to the frame indirectly when pressing, makes frame both sides or front and back atress unbalanced, and press the button in addition and need very big power, leads to the perambulator to turn on one's side easily or the back-and-forth movement, has the potential safety hazard.
Disclosure of Invention
In order to solve the problems, the invention provides a movable joint capable of rotating and locking, which adopts the following technical scheme:
a movable joint capable of rotating and locking comprises a first connecting piece, a second connecting piece and a movable limiting device, wherein the movable limiting device is connected between the first connecting piece and the second connecting piece, and axial displacement is generated when the movable limiting device rotates so as to realize rotation and locking of the second connecting piece.
The movable joint which can be rotated and locked as described above is further preferably: the movable limiting device comprises a limiting block and an inner core; the second connecting piece is sleeved on the limiting block and is in sliding fit with the limiting block; the limiting block is sleeved on the inner core and movably connected with the inner core, and the inner core is used for driving the limiting block to generate axial displacement during rotation so as to be connected with the first connecting piece in a pluggable manner, so that the second connecting piece is rotated or locked.
The movable joint which can be rotated and locked as described above is further preferably: the inner core is provided with a propelling part, and one end face of the propelling part is a curved surface; the limiting block is provided with a matching cavity, and the end surface of the matching cavity is matched with the end surface of the propelling part which is a curved surface; an elastic reset piece is arranged between the limiting block and the second connecting piece.
The movable joint which can be rotated and locked as described above is further preferably: the elastic reset piece is any one of a rubber block and a compression spring.
The movable joint which can be rotated and locked as described above is further preferably: the propulsion portion the stopper is two, and the one-to-one, two the stopper is located respectively the both ends of inner core, and for the symmetry setting.
The movable joint which can be rotated and locked as described above is further preferably: the limiting blocks are connected with the two ends of the first connecting piece in a pluggable mode respectively.
The movable joint which can be rotated and locked as described above is further preferably: the lateral wall of stopper with the second connecting piece is connected at the ascending joint of circumference.
The movable joint which can be rotated and locked as described above is further preferably: the limiting block is any one of a cylinder, a cube and a polygonal prism.
The movable joint which can be rotated and locked as described above is further preferably: one end of the limiting block is provided with a plugging convex block, the first connecting piece is provided with a limiting clamping groove matched with the plugging convex block, and the plugging convex block is connected with the limiting clamping groove in a pluggable manner; the plug lug and/or spacing draw-in groove be a plurality of, and be the circumference array distribution, the axis with the axis of rotation coincidence of second connecting piece.
The movable joint which can be rotated and locked as described above is further preferably: the plugging lug and the limiting clamping groove are multiple and same in quantity, and any plugging lug is connected with any limiting clamping groove in a pluggable mode.
The movable joint which can be rotated and locked as described above is further preferably: the plugging and unplugging lugs and the limiting clamping grooves are multiple and are in one-to-one correspondence, the contour of at least one plugging and unplugging lug is different from the contours of the rest plugging and unplugging lugs, and the contour of at least one limiting clamping groove is different from the contours of the rest limiting clamping grooves.
The movable joint which can be rotated and locked as described above is further preferably: the plugging and unplugging lugs and the limiting clamping grooves are multiple and are in one-to-one correspondence, at least one plugging and unplugging lug has different included angle angles with adjacent plugging and unplugging lugs, and at least one limiting clamping groove has different outlines with the rest limiting clamping grooves.
The movable joint which can be rotated and locked as described above is further preferably: the plugging and unplugging lugs and the limiting clamping grooves are multiple and are in one-to-one correspondence, at least one limiting clamping groove has different included angle angles with the adjacent limiting clamping grooves, and at least one plugging and unplugging lug has different outlines with the rest plugging and unplugging lugs.
The movable joint which can be rotated and locked as described above is further preferably: the first connecting piece is provided with an avoiding groove and connecting arms positioned on two sides of the avoiding groove; the avoidance groove is used for providing space for the rotation of the second connecting piece; the connecting arm is used for connecting the second connecting piece.
The movable joint which can be rotated and locked as described above is further preferably: and a damping ring is arranged between the connecting arm and the second connecting piece, and the damping ring is sleeved on the second connecting piece and is rotatably connected with the first connecting piece.
The movable joint which can be rotated and locked as described above is further preferably: and the outer end of the connecting arm is provided with a dustproof pad.
The movable joint which can be rotated and locked as described above is further preferably: the rotary knob is connected with one end of the movable limiting device and used for providing a position for rotating the movable limiting device.
The movable joint which can be rotated and locked as described above is further preferably: the knob comprises a connecting body and an outer sleeve; the connector with activity stop device's one end fixed connection, the overcoat is located on the lateral wall of connector.
The movable joint which can be rotated and locked as described above is further preferably: the knob further comprises a sealing buckle, and the sealing buckle is located at one end, far away from the movable limiting device, of the connector and connected with the connector in a clamping mode.
The movable joint which can be rotated and locked as described above is further preferably: the outer sleeve is connected with the connecting body in a clamping mode.
The movable joint which can be rotated and locked as described above is further preferably: and the side wall of the outer sleeve is provided with anti-skid protrusions and/or anti-skid depressions.
The movable joint which can be rotated and locked as described above is further preferably: the outer sleeve is made of any one of plastic, rubber and thermoplastic elastomer materials.
The movable joint which can be rotated and locked as described above is further preferably: the first connecting piece is provided with a limiting protrusion, the knob is provided with a limiting clamping plate, and the limiting protrusion is matched with the limiting clamping plate and used for limiting the rotating range of the knob.
The movable joint which can be rotated and locked as described above is further preferably: the auxiliary reset device is arranged on the first connecting piece, is connected with the inner core and is used for driving the inner core to reset when the inner core displaces.
The movable joint which can be rotated and locked as described above is further preferably: the auxiliary reset device is any one or combination of a torsion spring, an extension spring, a compression spring and a rubber strip.
Analysis shows that compared with the prior art, the invention has the advantages and beneficial effects that:
the rotatable and lockable mobile joint of the present invention has two states. The support state is used, and the storage state is used. When the support device is in a support state, the relative positions of the first connecting piece and the second connecting piece are kept unchanged and are locked by the movable limiting device; when the folding type folding chair is stored, the movable limiting device is unlocked, and the first connecting piece and the second connecting piece can rotate relatively to finish the folding action. When the unlocking mechanism is applied to a baby carriage, unlocking can be realized by rotating the movable limiting device, the baby carriage is convenient to store, a button does not need to be pressed during unlocking, force is generated by a user, and the operation difficulty can be reduced; in addition, the torsion applied by the operator cannot cause the side surface or front and back stress of the frame, so that the side turning or front and back movement of the baby carriage in the unlocking process can be avoided.
Drawings
Fig. 1 is a schematic view of the construction of a rotatable and lockable mobile joint of the invention.
Fig. 2 is a schematic structural view of the movable limiting device of the present invention.
Fig. 3 is an exploded view of the rotatable and lockable living joint of the present invention.
Fig. 4 is an exploded view of the movable limiting device of the present invention.
Fig. 5 is a schematic structural diagram of the limiting block of the present invention.
Fig. 6 is a first schematic structural diagram of the propulsion unit of the present invention.
Fig. 7 is a schematic structural view of the movable limiting device realized based on a ball screw pair.
Fig. 8 is a schematic structural view of the movable limiting device realized based on a guide rod and slide block mechanism.
Fig. 9 is a schematic structural view of the movable limiting device based on a groove and a guide post.
Fig. 10 is a second schematic structural view of the propulsion unit of the present invention.
Fig. 11 is a first schematic view illustrating the engagement between the plugging protrusion and the limiting slot according to the present invention.
Fig. 12 is a second schematic view illustrating the engagement between the plugging protrusion and the limiting slot according to the present invention.
In the figure: 1-a first connector; 2-a second connector; 3-a movable limiting device; 4-a limiting block; 5-an elastic restoring member; 6-auxiliary reset device; 7-a knob; 8-inner core; 9-a propelling part; 10-dust-proof pad; 11-a damping ring; 12-a linker; 13-a jacket; 14-sealing buckle; 15-a clamp spring; 16-plugging the lug; 17-sunken ear; 18-toggle ear; 19-a lead screw; 20-a nut; 21-a bearing; 22-a guide bar; 23-a first slider; 24-a strut; 25-a second slide; 26-guide pillar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
Referring to fig. 1 to 12, fig. 1 is a schematic structural view of a rotatable and lockable movable joint according to the present invention; FIG. 2 is a schematic structural view of the movable limiting device of the present invention; FIG. 3 is an exploded view of the rotatable and lockable mobile joint of the present invention; FIG. 4 is an exploded view of the movable stop device of the present invention; FIG. 5 is a schematic structural diagram of a limiting block of the present invention; FIG. 6 is a first schematic structural view of the propulsion unit of the present invention; FIG. 7 is a schematic structural view of the movable limiting device realized based on a ball screw pair; FIG. 8 is a schematic structural view of the movable limiting device based on a guide rod and slider mechanism; FIG. 9 is a schematic structural view of the movable limiting device based on a groove and a guide post; FIG. 10 is a second schematic structural view of the propulsion unit of the present invention; FIG. 11 is a first schematic view of the insertion/extraction protrusion and the limiting slot of the present invention; fig. 12 is a second schematic view illustrating the engagement between the plugging protrusion and the limiting slot according to the present invention.
As shown in fig. 1, 2, 7 to 9, the present invention provides a rotatable and lockable movable joint, which includes a first connecting member 1 and a second connecting member 2, and further includes a movable limiting device 3, wherein the movable limiting device 3 is connected between the first connecting member 1 and the second connecting member 2, and can be axially displaced during rotation to realize rotation and locking of the second connecting member 2.
The rotatable and lockable mobile joint of the present invention has two states. The support state is used, and the storage state (folded state) is used. When the device is used, the rotatable and locked movable joint is in a supporting state, and the relative positions of the first connecting piece 1 and the second connecting piece 2 are kept unchanged and are locked by the movable limiting device 3; when accomodating, activity stop device 3 unblock, but first connecting piece 1 and second connecting piece 2 relative rotation accomplish folding action, fold so that accomodate. When the rotatable and locked movable joint is applied to a baby carriage, unlocking can be realized by rotating the movable limiting device 3, the baby carriage is convenient to store, a button does not need to be pressed during unlocking, force is applied to a user, and the operation difficulty can be reduced; in addition, the torsion applied by the operator cannot cause the side surface or front and back stress of the frame, so that the side turning or front and back movement of the baby carriage in the unlocking process can be avoided.
The movable limiting means 3 of the present invention can be implemented in various forms. As shown in fig. 1 and 7, in one embodiment of the present invention, the movable limiting device 3 may be implemented based on a ball screw pair. Specifically, the first connecting piece 1 is sleeved on the outer side of the second connecting piece 2 and is rotatably connected with the second connecting piece 2, holes are formed in the side walls of the first connecting piece 1 and the second connecting piece 2, and when the first connecting piece 1 and the second connecting piece 2 are in a supporting state, the axes of the two holes coincide and do not coincide with the axes of the first connecting piece 1 and the second connecting piece 2 which rotate relatively. The movable limiting device 3 comprises a screw rod 19 and a nut 20, the nut 20 is rotatably connected with the first connecting piece 1 (the nut 20 is connected with the first connecting piece 1 through a bearing 21) and is matched with the screw rod 19, the axis of the screw rod 19 is overlapped with the axis of the hole in the first connecting piece 1, one end of the screw rod 19 is in sliding fit with the first connecting piece 1, and the screw rod 19 is located in the second connecting piece 2 (the interference part of the second connecting piece 2 and the screw rod 19 is cut off when the second connecting piece 2 rotates). When locking is needed, the hole of the first connecting piece 1 is overlapped with the hole of the second connecting piece 2, the nut 20 is rotated, the screw rod 19 matched with the nut 20 axially moves and penetrates into the two holes, and then the relative positions of the first connecting piece 1 and the second connecting piece 2 are locked; when the unlocking is needed, the nut 20 is rotated, the screw rod 19 matched with the nut 20 moves axially and retreats from the two holes, and then the unlocking of the first connecting piece 1 and the second connecting piece 2 is realized.
In another embodiment of the present invention, as shown in fig. 1 and 8, the movable limiting means 3 can also be realized based on a guide rod 22 slider mechanism. Specifically, the first connecting member 1 is sleeved on the outer side of the second connecting member 2 and rotatably connected with the second connecting member 2. The movable limiting device 3 comprises a guide rod 22, a support rod 24, a first sliding block 23 and a second sliding block 25. A first spiral guide groove and a second spiral guide groove are formed in the guide rod 22, the first sliding block 23 is matched with the first guide groove, and the second sliding block 25 is matched with the second guide groove; the axis of the supporting rod 24 coincides with the axis of the relative rotation of the first connecting piece 1 and the second connecting piece 2, the axis of the supporting rod 24 is parallel to the axis of the guide rod 22, the supporting rod 24 is slidably matched with the first sliding block 23 and the second sliding block 25, the first sliding block 23 is used for locking the first connecting piece 1, and the second sliding block 25 is used for locking the second connecting piece 2. When locking is needed, the guide rod 22 is rotated, the first sliding block 23 slides along the first guide groove, the second sliding block 25 slides along the second guide groove, the first sliding block 23 and the second sliding block 25 slide oppositely, when the first sliding block 23 locks the first connecting piece 1, the second sliding block 25 just locks the second connecting piece 2, and therefore locking of the relative positions of the first connecting piece 1 and the second connecting piece 2 is achieved; when unlocking is needed, the guide rod 22 is rotated, and the first sliding block 23 and the second sliding block 25 move in opposite directions, so that the first connecting piece 1 and the second connecting piece 2 are unlocked.
When the movable limiting device 3 is implemented based on the ball screw pair, although the purpose of locking/unlocking rotation can be achieved, certain disadvantages exist, namely, the linear motion stroke caused during rotation is small, the number of turns of rotation required for locking or unlocking is large, and in addition, the precision requirement is higher. When the movable limiting device 3 is realized based on the guide rod and slide block mechanism, although the purpose of rotation, namely locking/unlocking, can be realized, the adopted scheme is to lock the first connecting piece 1 and the second connecting piece 2 at the same time, so that the structure of one side is complex, the fault tolerance is low, and the movable limiting device is easy to damage during use.
As an improvement of the present invention, as shown in fig. 1 to 9, the present invention further provides the following modifications:
as shown in fig. 1, 2 and 9, in the present invention, the movable stopper 3 includes a stopper 4 and an inner core 8; the second connecting piece 2 is sleeved on the limiting block 4 and is in sliding fit with the limiting block 4 (a sliding groove and a sliding strip matched structure can be arranged to prevent the second connecting piece 2 and the limiting block 4 from rotating relatively). The limiting block 4 is sleeved on the inner core 8 and movably connected with the inner core 8, and the inner core 8 is used for driving the limiting block 4 to generate axial displacement during rotation so as to be connected with the first connecting piece 1 in a pluggable mode, so that the second connecting piece 2 can be rotated or locked.
Specifically, the second connecting member 2 is in sliding fit with the limiting block 4, and cannot rotate relatively, so that the limiting block 4 rotates along with the rotation of the second connecting member 2 all the time. The inner core 8 is in the stopper 4, and when the inner core 8 was rotated, stopper 4 can be stirred, and then made stopper 4 take place axial motion and lock first connecting piece 1, realize the locking of first connecting piece 1 and the relative position of second connecting piece 2. When the unlocking is needed, the inner core 8 rotates, and the limiting block 4 is stirred to axially move in the opposite direction (opposite direction) to unlock the first connecting piece 1. Adopt stopper 4 and inner core 8 matched with mode to realize the locking and the unblock of first connecting piece 1 and second connecting piece 2, simple structure, low to precision requirement, difficult emergence is inefficacy, convenient to use.
When the movable limiting device 3 is implemented based on the limiting block 4 and the inner core 8, there may be a plurality of implementation manners, as shown in fig. 1 and 9, in an embodiment of the present invention, a groove for guiding is formed on a circumferential surface of the limiting block 4, the groove is spiral, the inner core 8 is provided with a guide pillar 26 matched with the groove, and the guide pillar 26 is in sliding fit with the groove. The inner core 8 is rotated, the inner core 8 can stir the limiting block 4 to move axially, and then the relative positions of the first connecting piece 1 and the second connecting piece 2 are locked or unlocked.
In the above embodiment, although the structure of the movable limiting device 3 is simplified, so that the operation of the movable limiting device 3 is more convenient, there still exists a certain potential failure, namely: the cooperation of the groove and the guide post 26 has certain requirements on lubricity, large force is needed when the inner core 8 is rotated, and even the guide post 26 of the inner core 8 is easy to be clamped when sliding in the groove, so that the movable limiting device 3 fails.
As a further improvement, as shown in fig. 1 to 6, in the present invention, a pushing part 9 is provided on the inner core 8, and an end face of one end of the pushing part 9 is a curved surface; be equipped with the cooperation chamber on stopper 4, the terminal surface in cooperation chamber and propulsion portion 9 are the terminal surface phase-match of curved surface, and the inner peripheral surface in cooperation chamber and the global outline phase-match (for example clearance fit, transition fit) of propulsion portion are equipped with elasticity between stopper 4 and the second connecting piece 2 and reset piece 5, and elasticity resets and is in the elastic deformation state of pressurized all the time. Inner core 8 is when rotating, and the terminal surface that is the curved surface changes with stopper 4's cooperation chamber contact position, and then can make stopper 4 take place axial translation, unblock first connecting piece 1, when inner core 8 loses the moment of torsion, elasticity resets 5 and transmits thrust to stopper 4, promotes stopper 4 and moves to the direction of locking first connecting piece 1, and then locks the relative position of first connecting piece 1 and second connecting piece 2 when first connecting piece 1 and second connecting piece 2 are in the supported position. The limiting block 4 and the pushing part 9 of the invention realize unlocking and locking in a surface-to-surface matching mode, and can be realized by a small force when the inner core 8 is rotated compared with the embodiment, and the invention has no clamping condition, is not easy to lose efficacy and is more convenient to use.
For the matching structure formed by the end face of the pushing part 9 with the curved surface and the matching cavity of the limiting block 4, the end face of the pushing part 9 with the curved surface is provided with a toggle lug 18, and the end face of the matching cavity is provided with a concave lug 17. When the toggle lug 18 is matched with the sunken lug 17, the limiting block 4 locks the first connecting piece 1; when the toggle lug 18 leaves the concave lug 17, the limiting block 4 unlocks the first connecting piece 1. In practice, as shown in fig. 6 and 10, the number of the recessed lugs 17 and/or the toggle lugs 18 is not limited to one, and may be one, two or more. The elastic reset piece 5 is any one of a rubber block and a compression spring, preferably the compression spring, is convenient for structural arrangement, the compression spring is sleeved on the inner core 8, one end of the compression spring is abutted against the pushing part 9, and the other end of the compression spring is abutted against the limiting block 4.
Further, for the selection of the number of the pushing parts 9 and the limiting blocks 4, the pushing parts 9 and the limiting blocks 4 may be one or two. Preferably, the pushing portions 9 and the limiting blocks 4 are two and are in one-to-one correspondence, the two limiting blocks 4 are respectively located at two ends of the inner core 8, and are preferably symmetrically arranged (the specific shapes of the two limiting blocks 4 can be different), and the stress of the two end faces of the first connecting piece 1 and the stress of the two end faces of the second connecting piece 2 at the joint can be balanced.
Further, in order to improve the locking strength, in the present invention, the limit blocks 4 are respectively connected with the two ends of the first connecting member 1 in a pluggable manner. Specifically, in a locking state, the two limit blocks 4 are respectively connected with two ends of the first connecting piece 1 in an inserting manner, so that the relative rotation between the limit blocks 4 and the first connecting piece 1 can be avoided; when the unlocking is needed, the limiting block 4 is pulled out of the first connecting piece 1, and the first connecting piece 1 and the second connecting piece 2 can rotate relatively. Preferably, the side wall of the limiting block 4 is connected with the second connecting piece 2 in a clamping manner in the circumferential direction, and the limiting block 4 can be any one of a cylinder, a cube and a polygonal prism.
Furthermore, the limiting block 4 is preferably a cylinder (the circumferential surface of the cylinder and the second connecting piece 2 are provided with a structure matched with a sliding groove and a sliding strip), one end of the limiting block 4 is provided with a plug lug 16, the first connecting piece 1 is provided with a limiting clamping groove matched with the plug lug 16, and the plug lug 16 is connected with the limiting clamping groove in a pluggable manner. Alternatively, at least one of the insertion and extraction projection 16 and/or the limiting slot is distributed in a circumferential array, and the axis coincides with the rotation axis of the second connecting piece 2. The number of the plugging convex blocks 16 and the number of the limiting clamping grooves are selected to have four conditions, the first condition is that the number of the plugging convex blocks 16 is less than that of the limiting clamping grooves (at least one plugging convex block 16), the number of the limiting clamping grooves is multiple, the plugging convex blocks 16 can be matched with the limiting clamping grooves respectively, the locking purpose can be realized at different matching positions, but included angles between the first connecting piece 1 and the second connecting piece 2 at different matching positions are different, and the height of the baby carriage can be adjusted when the baby carriage is applied to the baby carriage; secondly, the number of the plugging convex blocks 16 is larger than that of the limiting clamping grooves (at least one limiting clamping groove), the limiting clamping grooves can be respectively matched with the plurality of plugging convex blocks 16, and the included angle between the first connecting piece 1 and the second connecting piece 2 can be adjusted when the locking is carried out; thirdly, the number of the plugging convex blocks 16 and the number of the limiting clamping grooves are both one, and the first connecting piece 1 and the second connecting piece 2 are locked during plugging; fourthly, the number of the plugging convex blocks 16 and the number of the limiting clamping grooves are multiple and the same.
In the above fourth case, the embodiments of the present invention can be divided into four types: firstly, a plurality of plugging convex blocks 16 and a plurality of limiting clamping grooves are arranged, the number of the plugging convex blocks 16 is the same, and any plugging convex block 16 is connected with any limiting clamping groove in a plugging manner, so that the connection strength of the limiting block 4 and the first connecting piece 1 in a locking state can be improved, and the connection structure of the limiting block 4 and the first connecting piece 1 is firm and reliable; secondly, as shown in fig. 11, the plurality of plugging and unplugging bumps 16 and the plurality of limiting card slots are in one-to-one correspondence, the contour of at least one plugging and unplugging bump 16 is different from the contours of the rest of the plugging and unplugging bumps 16, and meanwhile, the contour of at least one limiting card slot is different from the contours of the rest of the limiting card slots (the plurality of plugging and unplugging bumps 16 and the plurality of limiting card slots are in one-to-one correspondence, one plugging and unplugging bump 16 and one limiting card slot form a pair, and in the formed pairs, the contour of one pair of plugging and unplugging bump 16 and limiting card slot is different from the other pairs, for example, the contour of the pair is obviously larger than the contours of the other pairs, so that only one locking position can be limited, and certainly; thirdly, as shown in fig. 12, the plugging protrusion 16 and the position-limiting slot are both plural, and are in one-to-one correspondence, the included angle β between at least one plugging protrusion 16 and the adjacent plugging protrusion 16 is different from the included angle α between other adjacent plugging protrusions 16, and the profile between at least one position-limiting slot and the rest position-limiting slots is different (for example, the plugging protrusions 16 are distributed in a circumferential array, the included angle between the plugging protrusion 16 at the head and the tail of the circumferential array is larger than the included angle between the plugging protrusion 16 at the middle, and the profile of one position-limiting slot is larger than the profiles of the rest position-limiting slots), at this time, two locking states can be provided, namely, locking during folding and locking during use (the position-limiting slot with a large profile is used to cooperate with the plugging protrusion 16 at the head and the tail, when the plugging protrusion 16 at the head is inserted into the position-limiting slot, locking in use state is performed, a locked folded state); fourthly, the plugging convex blocks 16 and the limiting clamping grooves are multiple and are in one-to-one correspondence, the included angle between at least one limiting clamping groove and the adjacent limiting clamping groove is different, and the profile of at least one plugging convex block 16 and the profile of the rest plugging convex blocks 16 are different (for example, the limiting clamping grooves are distributed in a circumferential array, the included angle between the limiting clamping grooves at the head and the tail of the circumferential array is different from the included angle between the plugging convex blocks 16 at the middle, and the profile of one plugging convex block 16 is smaller than the profiles of the rest limiting clamping grooves).
Further, in the invention, the first connecting piece 1 is provided with an avoiding groove and connecting arms positioned at two sides of the avoiding groove; the avoidance groove can provide a space for the rotation of the second connector 2; the connecting arm can be connected with second connecting piece 2 to at first connecting piece 1 and the 2 junctions of second connecting piece, embrace second connecting piece 2 by 2 both sides of second connecting piece, prevent that second connecting piece 2 from taking place the axial float. Preferably, a damping ring 11 is arranged between the connecting arm and the second connecting piece 2, and the damping ring 11 is sleeved on the second connecting piece 2 and is rotatably connected with the first connecting piece 1, so that the first connecting piece 1 and the second connecting piece 2 can rotate relatively; the outer end (the one end that deviates from second connecting piece 2) of linking arm is equipped with dustproof pad 10, can play dustproof effect.
Further, in order to facilitate the user to rotate the inner core 8, in the present invention, the movable limiting device 3 further includes a knob 7, and the knob 7 is connected to one end of the movable limiting device 3, and can provide a position for rotating the movable limiting device 3, which is convenient for the user to operate. Preferably, the knob 7 comprises a connecting body 12 and an outer sleeve 13; the connecting body 12 is fixedly connected with one end (one end of the inner core 8) of the movable limiting device 3, the outer sleeve 13 is positioned on the side wall of the connecting body 12, can be integrally formed with the connecting body 12 and is also connected with the connecting body 12 in a clamping and bonding mode, and as a measure for preventing slipping, a clamping structure of a groove and a strip is arranged between the connecting body 12 and the outer sleeve 13. The outer cover 13 may be made of any one of plastic, rubber, and thermoplastic elastomer, and can prevent hand damage. The side wall of the outer sleeve 13 is provided with anti-slip protrusions and/or anti-slip recesses, which can prevent the hands of a user from slipping with the outer sleeve 13 when the user uses the glove.
Furthermore, in the present invention, the knob 7 further includes a sealing buckle 14, the sealing buckle 14 is located at one end of the connecting body 12 far away from the movable limiting device 3, and is connected with the connecting body 12 in a clamping manner, and a clamping pin is arranged on the sealing buckle 14, and can be clamped on a hole on the end surface of the connecting body 12, and cannot fall off when in use.
Further, in the invention, the limiting block rotates synchronously with the second connecting piece 2, and the inner core 8 and the first connecting piece 1 keep relatively static when not being affected by manpower. Be equipped with spacing arch on the first connecting piece 1, be equipped with spacing cardboard on the knob 7, spacing arch and spacing cardboard cooperate, can inject the rotation range of knob 7. Specifically, the limiting protrusion is annular and is provided with a notch, and the limiting clamping plate is located in the notch and swings within the range of the notch, so that the rotating range of the knob 7 can be limited.
Further, in order to facilitate the automatic reset of the knob 7, in the present invention, an auxiliary reset device 6 is further included, and the auxiliary reset device 6 is mounted on the first connecting member 1 and connected to the inner core 8 (connected to the knob 7 rotating synchronously with the inner core 8), and is capable of driving the inner core 8 to reset when the inner core 8 is displaced (rotated). As an alternative, the auxiliary return means 6 may be any one or a combination of a torsion spring, an extension spring, a compression spring, a rubber strip, preferably a torsion spring, one end of which is connected to the inner core 8 and the other end of which is connected to the second connecting member 2, and which is capable of providing a return torque to the inner core 8 and the knob 7.
As shown in fig. 1 to 6, the working process of the present invention is explained in detail as follows:
taking the movable limiting device 3 realized based on the limiting block 4 and the inner core 8 as an example, when the rotatable and locked movable joint is used for a baby carriage, the movable joint can be applied to the frame of the baby carriage, realizes the folding and containing functions of the frame, and can lock the frame when the frame is unfolded.
The first connecting piece 1 is sleeved outside the second connecting piece 2 and is rotatably connected with the second connecting piece 2, and for manufacturing convenience, the first connecting piece 1 can be made into an upper part and a lower part which are connected through bolts. The first connecting piece 1 is connected with one folding part of the frame, and the second connecting piece 2 is connected with the other folding part of the frame. Stopper 4 of activity stop device 3 is two, and the symmetry is installed on the second link, is equipped with elasticity piece 5 (compression spring) that resets between stopper 4 and the second connecting piece 2, and inner core 8 is one, alternates in the axis department of stopper 4, is equipped with two propulsion portions 9 on the inner core 8, two propulsion portions 9 and two stopper 4 one-to-one. The inner core 8 is fixed in the axial direction by a snap spring 15. As an equivalent embodiment, the inner core 8 may be provided as one mandrel, and the two propelling parts 9 may be provided as two separate parts and fixedly connected with the mandrel. The limiting block 4 is provided with a matching cavity, and the inner core 8 is provided with a propelling part 9. The limiting block 4 is provided with a plurality of plugging convex blocks 16, and the first connecting piece 1 is provided with a plurality of limiting clamping grooves which are in one-to-one correspondence with the plugging convex blocks 16. An auxiliary reset device 6 is arranged between the second connecting piece 2 and the inner core 8, so that the inner core 8 can be reset conveniently.
When the baby carriage needs to be stored, the knob 7 is rotated, the pushing part 9 pulls the limiting block 4 when the baby carriage rotates, and the plugging convex block 16 of the limiting block 4 is withdrawn from the limiting clamping groove, so that the folding baby carriage can be rotated; when taking out the use by accomodating the state, prop open first connecting piece 1 and second connecting piece 2, plug lug 16 can get into spacing draw-in groove under the thrust of elasticity piece 5 that resets.
The movable limiting devices 3 can also be used in combination. For example, both ends of a first link 1 are each rotatably connected to a second link 2. The joint is provided with two movable limiting devices 3, and the two movable limiting devices 3 can form a two-fold folding structure. By analogy, a multi-fold folding structure can be realized.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (10)
1. A rotatable and lockable mobile joint comprising a first connection and a second connection, characterized in that:
the locking device is characterized by further comprising a movable limiting device, wherein the movable limiting device is connected between the first connecting piece and the second connecting piece, and the movable limiting device generates axial displacement when rotating so as to realize rotation and locking of the second connecting piece.
2. The rotatable and lockable mobile joint according to claim 1, characterized in that:
the movable limiting device comprises a limiting block and an inner core;
the second connecting piece is sleeved on the limiting block and is in sliding fit with the limiting block;
the limiting block is sleeved on the inner core and movably connected with the inner core, and the inner core is used for driving the limiting block to generate axial displacement during rotation so as to be connected with the first connecting piece in a pluggable manner, so that the second connecting piece is rotated or locked.
3. The rotatable and lockable mobile joint according to claim 2, characterized in that:
the inner core is provided with a propelling part, and one end face of the propelling part is a curved surface;
the limiting block is provided with a matching cavity, and the end surface of the matching cavity is matched with the end surface of the propelling part which is a curved surface;
an elastic reset piece is arranged between the limiting block and the second connecting piece;
preferably, the elastic reset piece is any one of a rubber block and a compression spring.
4. The rotatable and lockable mobile joint according to claim 3, characterized in that:
the two limiting blocks are respectively positioned at two ends of the inner core and are symmetrically arranged;
preferably, the limiting blocks are respectively connected with two ends of the first connecting piece in a pluggable manner;
the side wall of the limiting block is connected with the second connecting piece in a clamping mode in the circumferential direction;
the limiting block is any one of a cylinder, a cube and a polygonal prism.
5. The rotatable and lockable mobile joint according to claim 2, characterized in that:
one end of the limiting block is provided with a plugging convex block, the first connecting piece is provided with a limiting clamping groove matched with the plugging convex block, and the plugging convex block is connected with the limiting clamping groove in a pluggable manner;
the plug lug and/or spacing draw-in groove be a plurality of, and be the circumference array distribution, the axis with the axis of rotation coincidence of second connecting piece.
6. The rotatable and lockable mobile joint according to claim 5, characterized in that:
the plugging lug is connected with the limiting clamping groove in a pluggable manner; or
The plugging and unplugging lugs and the limiting clamping grooves are multiple and correspond to each other one by one, the contour of at least one plugging and unplugging lug is different from the contours of the rest plugging and unplugging lugs, and the contour of at least one limiting clamping groove is different from the contours of the rest limiting clamping grooves; or
The plugging convex blocks and the limiting clamping grooves are multiple and are in one-to-one correspondence, the included angle between at least one plugging convex block and the adjacent plugging convex block is different, and the outlines of at least one limiting clamping groove and the rest limiting clamping grooves are different; or
The plugging and unplugging lugs and the limiting clamping grooves are multiple and are in one-to-one correspondence, at least one limiting clamping groove has different included angle angles with the adjacent limiting clamping grooves, and at least one plugging and unplugging lug has different outlines with the rest plugging and unplugging lugs.
7. The rotatable and lockable mobile joint according to claim 2, characterized in that:
the first connecting piece is provided with an avoiding groove and connecting arms positioned on two sides of the avoiding groove;
the avoidance groove is used for providing space for the rotation of the second connecting piece; the connecting arm is used for connecting the second connecting piece;
preferably, a damping ring is arranged between the connecting arm and the second connecting piece, and the damping ring is sleeved on the second connecting piece and is rotatably connected with the first connecting piece;
and the outer end of the connecting arm is provided with a dustproof pad.
8. The rotatable and lockable mobile joint according to claim 1, characterized in that:
the knob is connected with one end of the movable limiting device and used for providing a position for rotating the movable limiting device;
preferably, the knob comprises a connecting body and an outer sleeve; the connecting body is fixedly connected with one end of the movable limiting device, and the outer sleeve is positioned on the side wall of the connecting body;
the knob further comprises a sealing buckle, and the sealing buckle is positioned at one end of the connecting body, which is far away from the movable limiting device, and is connected with the connecting body in a clamping manner;
the outer sleeve is connected with the connecting body in a clamping manner;
the anti-skid sleeve is characterized in that anti-skid protrusions and/or anti-skid depressions are arranged on the side wall of the outer sleeve, and the outer sleeve is made of any one of plastics, rubber and thermoplastic elastomer materials.
9. The rotatable and lockable mobile joint according to claim 8, characterized in that:
the first connecting piece is provided with a limiting protrusion, the knob is provided with a limiting clamping plate, and the limiting protrusion is matched with the limiting clamping plate and used for limiting the rotating range of the knob.
10. The rotatable and lockable mobile joint according to claim 2, characterized in that:
the auxiliary reset device is arranged on the first connecting piece, is connected with the inner core and is used for driving the inner core to reset when the inner core displaces;
preferably, the auxiliary return device is any one of a torsion spring, an extension spring, a compression spring, a rubber strip or a combination thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010982909.7A CN111994163A (en) | 2020-09-17 | 2020-09-17 | Rotatable and lockable movable joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010982909.7A CN111994163A (en) | 2020-09-17 | 2020-09-17 | Rotatable and lockable movable joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111994163A true CN111994163A (en) | 2020-11-27 |
Family
ID=73474711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010982909.7A Pending CN111994163A (en) | 2020-09-17 | 2020-09-17 | Rotatable and lockable movable joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111994163A (en) |
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