CN111907580A

CN111907580A - Rotatable and lockable movable joint

Info

Publication number: CN111907580A
Application number: CN202010962357.3A
Authority: CN
Inventors: 韩涛
Original assignee: Beijing Baby Travel Technology Co ltd
Current assignee: Beijing Baby Travel Technology Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2020-11-10

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 radially displaced when rotating so as to realize rotation and locking of the second connecting piece. The invention realizes unlocking through rotation, does not need to press a button during unlocking, is beneficial to exerting force on a user, and can reduce the operation difficulty; and when the device is applied to the baby carriage, the torsion 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

Rotatable and lockable movable joint

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 the movable limiting device radially displaces when rotating 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 shell and an inner core; the shell is fixedly connected with the first connecting piece and rotatably connected with the second connecting piece; the inner core is positioned in the outer shell and protrudes out of the outer shell, and the inner core is used for generating radial displacement when rotating so as to rotate or lock the second connecting piece.

The movable joint which can be rotated and locked as described above is further preferably: the housing includes a side chamber and a communication hole; the side chamber is positioned on the side wall of the shell, and the communication hole is communicated with the side chamber; the inner core comprises a mandrel and a sliding block; the sliding block is in sliding fit with the side cavity, and an accommodating cavity is formed in the sliding block; the periphery of the mandrel is provided with a convex part and a matching part, the mandrel is inserted into the communicating hole and the containing cavity in a penetrating mode, the matching part is rotatably connected with the communicating hole, the convex part is in contact with the inner wall of the containing cavity, and the outline of the containing cavity is larger than that of the convex part.

The movable joint which can be rotated and locked as described above is further preferably: the slider is provided with a guide groove, the shell is provided with a guide strip, and the guide groove is in sliding fit with the guide strip.

The movable joint which can be rotated and locked as described above is further preferably: in the sliding direction of the sliding block, an elastic strip which can be elastically deformed and is always in a pressed state is arranged between the sliding block and the shell.

The movable joint which can be rotated and locked as described above is further preferably: the elastic strip is any one of a rubber strip, a compression spring and a plate spring.

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 shell, a connecting hole is formed in the connecting arm, and the connecting hole is connected with the two ends of the shell in a clamping mode.

The movable joint which can be rotated and locked as described above is further preferably: the anti-rotation clamping block is arranged on the connecting hole, clamping jaws are arranged at two ends of the shell, and the anti-rotation clamping block is connected with the clamping jaws in a clamping mode.

The movable joint which can be rotated and locked as described above is further preferably: the connecting holes comprise a first hole and a second hole, and the number of the anti-rotation clamping blocks on the first hole is less than that of the anti-rotation clamping blocks on the second hole; and a sealing element is arranged on the second hole.

The movable joint which can be rotated and locked as described above is further preferably: the sealing piece is connected with the second hole in a clamping mode.

The movable joint which can be rotated and locked as described above is further preferably: the second connecting piece is provided with a sleeve hole, and the side wall of the sleeve hole is provided with a clamping groove; the shell is located in the sleeve hole, and is rotatably connected with the sleeve hole, and the clamping groove is used for being connected with the inner core in a clamping mode.

The movable joint which can be rotated and locked as described above is further preferably: the reset device is arranged on the inner core, connected with the shell and 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 reset device is any one or combination of a torsion spring, an extension spring, a compression spring and a rubber strip.

The movable joint which can be rotated and locked as described above is further preferably: the knob is connected with one end of the inner core and used for providing a position for rotating the inner core.

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 the one end fixed connection of inner core, 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 inner core, 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 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.

The movable joint which can be rotated and locked as described above is further preferably: the first connecting piece is provided with a limiting bulge, the knob is provided with a limiting notch, and the limiting bulge is matched with the limiting notch and used for limiting the rotation range of the movable limiting device.

Analysis shows that compared with the prior art, the invention has the advantages and beneficial effects that:

the first connecting piece and the second connecting piece of the rotary and locking movable joint can rotate relatively so as to be accommodated. When the first connecting piece and the second connecting piece are in a supporting state, the first connecting piece and the second connecting piece are locked by the movable limiting device; when the folding type portable electronic device is folded from the supporting state, the unlocking can be realized by rotating the movable limiting device. The invention realizes unlocking through rotation, does not need to press a button during unlocking, is beneficial to exerting force on a user, and can reduce the operation difficulty; and when the device is applied to the baby carriage, the torsion 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.

Drawings

FIG. 1 is a schematic view of the connection of a rotatable and lockable living joint of the present invention.

Fig. 2 is an exploded view of the rotatable and lockable mobile joint of the present invention.

Fig. 3 is an exploded view of the movable limiting device of the present invention.

Fig. 4 is a schematic structural diagram of the housing of the present invention.

Fig. 5 is a schematic structural view of the mandrel of the present invention.

Fig. 6 is a schematic view of the engagement of the inner core and the outer shell of the present invention.

Fig. 7 is a schematic structural view of the rack and pinion mechanism of the present invention.

Fig. 8 is a schematic structural view of the worm gear and ball screw mechanism of the present invention.

In the figure: 1-a first connector; 2-a second connector; 3-a movable limiting device; 4, sealing a buckle; 5-coating the outer sleeve; 6-linker; 7-a resetting device; 8-mandrel; 9-a slide block; 10-a housing; 11-a clamp spring; 12-a communication hole; 13-a guide bar; 14-a jaw; 15-a boss; 16-a mating portion; 17-an accommodating cavity; 18-a rack; 19-a gear; 20-a worm; 21-a worm gear; 22-screw rod.

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 8, fig. 1 is a schematic connection diagram of a movable joint of the present invention, which can be rotated and locked; FIG. 2 is an exploded view of the rotatable and lockable mobile joint of the present invention; FIG. 3 is an exploded view of the movable stop device of the present invention; FIG. 4 is a schematic structural view of the housing of the present invention; FIG. 5 is a schematic structural view of a mandrel of the present invention; FIG. 6 is a schematic view of the engagement of the inner core and outer shell of the present invention; FIG. 7 is a schematic structural view of a rack and pinion mechanism of the present invention; fig. 8 is a schematic structural view of the worm gear and ball screw mechanism of the present invention.

As shown in fig. 1 to 3, 7 and 8, the present invention provides a rotatable and lockable movable joint, which comprises a first connecting member 1 and a second connecting member 2, and further comprises 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 radially displaced when rotating, so as to realize the rotation and locking of the second connecting member 2.

When the space occupation needs to be reduced, the first connecting piece 1 and the second connecting piece 2 can rotate relatively so as to be convenient to store. When in a supporting state, the first connecting piece 1 and the second connecting piece 2 are locked by the movable limiting device 3; when the folding-up device is folded up from the supporting state, the unlocking can be realized by rotating the movable limiting device 3. The invention realizes unlocking through rotation, does not need to press a button during unlocking, is beneficial to exerting force on a user, and can reduce the operation difficulty; and when the device is applied to the baby carriage, the torsion 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.

In the invention, the movable limiting device 3 comprises an outer shell 10 and an inner core; the housing 10 is fixedly connected to the first connecting part 1 and rotatably connected to the second connecting part 2. The inner core is located in the outer shell 10 and protrudes out of the outer shell 10, and can be displaced radially when rotated, so that the second connecting piece 2 is unlocked to rotate the second connecting piece 2, or the second connecting piece 2 is locked.

In the present invention, the movement of the inner core can be achieved in various forms. As shown in fig. 7, in one embodiment of the present invention, it can be implemented based on a rack and pinion mechanism. Specifically, the movable limiting device 3 further comprises a gear 19, a gear shaft and a rack 18; the second connector 2 is provided with a groove. A rack 18 is mounted on the core and engages with a gear 19. The gear shaft is mounted in the housing 10, the axis of the gear shaft coincides with the axis of the housing 10, the gear shaft is rotatably connected to the housing 10, and the gear 19 is mounted on the gear shaft and meshed with the rack 18. When the second connecting piece 2 needs to be locked, the gear shaft is rotated, the gear 19 is further driven to rotate, the rack 18 meshed with the gear 19 translates, and the inner core is further inserted into the groove of the second connecting piece 2, so that the relative positions of the first connecting piece 1 and the second connecting piece 2 are locked. When unlocking is needed, the gear shaft is reversely rotated, and the inner core is retracted into the outer shell 10, so that unlocking is realized.

In another embodiment of the invention, the method can also be realized based on a chain wheel and chain mechanism. Specifically, the rack 18 in the above embodiment is replaced with a chain; the gear 19 in the above embodiment is replaced with a sprocket. The chain wheel can drive the chain to move linearly by rotating, and then the inner core is driven to lock the second connecting piece 2 or unlock the second connecting piece 2.

In yet another embodiment of the present invention, as shown in fig. 8, it may also be implemented based on a worm gear and ball screw mechanism. Specifically, the movable limiting device 3 further comprises a worm 20, a worm wheel 21 and a screw rod 22. The worm 20 is mounted in the housing 10 and is rotatably connected to the housing 10 (for example, by mounting a bearing between the worm 20 and the housing 10, so that the worm 20 is rotatably connected to the housing 10), and the axis of the worm 20 coincides with the axis of the housing 10. The worm wheel 21 is positioned in the shell 10 and matched with the worm 20, the axis of the worm wheel 21 and the axis of the worm 20 form a space vertical, the worm wheel 21 is hollow, threads matched with the screw rod 22 are processed on the hollow side wall, the screw rod 22 is inserted into the worm wheel 21 and matched with the worm wheel 21 in a threaded mode, and one end of the screw rod 22 is connected with the inner core. When the second connecting piece 2 needs to be locked, the worm 20 is rotated, the worm wheel 21 matched with the worm 20 synchronously rotates, the screw rod 22 is further driven to linearly move, the inner core is fixedly connected with the second connecting piece 2, and the second connecting piece 2 is locked. When the second connecting piece 2 needs to be unlocked, the worm 20 is rotated reversely, the inner core retreats into the shell 10, and the second connecting piece 2 is unlocked.

In the above three embodiments of the present invention, the movable limiting device 3 may be configured to unlock the second connecting member 2 by rotating and unlocking, and lock the second connecting member 2. In any of the above embodiments, there are disadvantages that the structure is more or less complicated, or it is liable to fail in use. As an improvement of the present invention, as shown in fig. 2 to 6, the present invention further provides the following modifications:

in the present invention, the housing 10 includes a side chamber and a communication hole 12; the side chamber is located on the side wall of the housing 10, and the communication hole 12 communicates with the side chamber. The inner core comprises a mandrel 8 and a sliding block 9; the sliding block 9 is in sliding fit with the side cavity, and the sliding block 9 is provided with an accommodating cavity 17; the circumferential surface of the mandrel 8 is provided with a convex part 15 and a matching part 16, the mandrel 8 is inserted into the communicating hole 12 and the accommodating cavity 17, the matching part 16 is rotatably connected with the communicating hole 12, the mandrel 8 and the sliding block 9 can be arranged in a relatively rotating manner, and the mandrel 8 can be arranged in an axially fixed manner through the clamp spring 11; the convex part 15 is contacted with the inner wall of the accommodating cavity 17, and the outline of the accommodating cavity 17 is larger than that of the convex part 15, so that the sliding block 9 can be stirred to slide. When the second connecting piece 2 is in a locking state, the sliding block 9 is pressed on the second connecting piece 2 (the second connecting piece 2 can be grooved or provided with concave-convex lines) so as to lock the relative position of the second connecting piece 2 and the first connecting piece 1. When the second connecting piece 2 needs to be unlocked, the mandrel 8 is rotated, the boss 15 of the mandrel 8 presses the surface of the accommodating cavity 17, and the sliding block 9 is driven to be withdrawn into the side cavity and the communicating hole 12 from the surface of the second connecting piece 2, so that the second connecting piece 2 is unlocked. When the second connecting piece 2 is unlocked or locked, the sliding block 9 can slide relatively in a mode of matching the convex part 15 with the inner wall of the accommodating cavity 17, precise matching is not needed, the locking device can adapt to various severe use environments, and the service life is long.

Further, in order to accurately adjust the sliding posture of the slider 9, in the present invention, the slider 9 is provided with a guide groove, the housing 10 is provided with a guide bar 13, the guide groove is in sliding fit with the guide bar 13, so as to provide guidance for the sliding of the slider 9, and the sliding posture of the slider 9 is accurately adjusted, thereby preventing the slider 9 from failing.

Furthermore, in order to facilitate the resetting of the sliding block 9 (here, after the second connecting piece 2 rotates to a preset locking angle matched with the sliding block 9, the sliding block 9 automatically locks the second connecting piece 2), in the invention, an elastic strip which can be elastically deformed and is always in a pressed state is arranged between the sliding block 9 and the shell 10 in the sliding direction of the sliding block 9, so that the resetting power can be provided for the sliding block 9. The elastic strip can be any one of a rubber strip, a compression spring and a plate spring, preferably the compression spring, and has larger stroke, larger elastic force and longer service life.

Further, in order to facilitate the relative rotation of the first connecting piece 1 and the second connecting piece 2, 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 two connecting arms and the avoiding groove form a U shape, and the two connecting arms are connected to the outer side of the shell 10 and fixedly connected with the shell 10; the second connecting piece 2 is articulated with shell 10 in dodging the inslot, dodges the groove and can provide the space for the rotation of second connecting piece 2 to, the linking arm keeps off at the both ends of shell 10, can avoid second connecting piece 2 and shell 10 to break away from, and then can improve joint strength.

Preferably, the connecting arm is fixedly connected to the housing 10 by means of a snap connection, so that the housing 10 and the connecting arm can be prevented from rotating relative to each other. Specifically, the connecting arm is provided with a connecting hole, and the connecting hole is sleeved at two ends of the outer side of the housing 10 and is connected with two ends of the housing 10 in a clamping manner (in interference fit). Be equipped with on the connecting hole and prevent changeing the fixture block, the both ends of shell 10 are equipped with jack catch 14, prevent changeing the fixture block and connect with 14 joint of jack catch, and jack catch 14 is installed and is prevented changeing between the fixture block by two adjacent, can avoid shell 10 and linking arm to take place relative rotation.

Further, in order to construct a good working environment of the movable limiting device 3, in the invention, the connecting holes comprise a first hole and a second hole, and the number of the anti-rotation clamping blocks on the first hole is less than that on the second hole. The quantity of the anti-rotation fixture blocks on the first hole is the same as that of the fixture claws 14 on one end of the shell 10 matched with the first hole, the fixture claws 14 are in one-to-one correspondence, the fixture claws 14 are clamped between two adjacent anti-rotation fixture blocks, and the anti-rotation fixture blocks and the fixture claws 14 form approximately meshed distribution. Be equipped with the sealing member on the second hole, the second hole prevents that the fixture block that changes that exceeds first hole can be connected with the sealing member joint, prevents that the sealing member from droing.

Further, in order to improve the locking strength of the second connecting piece 2 in the locking state, in the invention, the second connecting piece 2 is provided with a sleeve hole, and the side wall of the sleeve hole is provided with a clamping groove; the shell 10 is located the bell and spigot joint downthehole, with the rotatable connection in bell and spigot joint hole, the draw-in groove can be connected with the slider 9 joint of inner core to strengthen the joint intensity of second connecting piece 2 and slider 9.

Further, in order to improve the convenience of the invention in use, the invention further comprises a reset device 7, wherein the reset device 7 is arranged on the mandrel 8 of the inner core and is connected with the shell 10, and can drive the inner core to reset when the inner core is displaced (here, after the second connecting piece 2 rotates to a preset locking angle matched with the sliding block 9, the sliding block 9 automatically locks the second connecting piece 2), so that the use by a user is facilitated. Specifically, the restoring device 7 may be any one of or a combination of a torsion spring, an extension spring, a compression spring, and a rubber strip, and is preferably a torsion spring, which occupies a small space and can provide a torsion moment.

Furthermore, in order to facilitate the operation, the invention further comprises a knob, wherein the knob is connected with one end of the inner core (the end of the inner core provided with the reset device 7), so that the position for rotating the inner core can be provided for a user, and the manual operation is facilitated.

Further, in the present invention, the knob includes a connecting body 6 and an outer case 5; the connecting body 6 is fixedly connected with one end of the inner core, the connecting body 6 can be in a cylindrical shape, a rectangular shape, a polygonal shape and the like, and the outer sleeve 5 is coated on the side wall of the connecting body 6. The outer cover 5 may be made of any one of plastic, rubber, and thermoplastic elastomer, and has certain elasticity to prevent hand hurting during use. In order to prevent the user from slipping when twisting the knob, the side wall of the casing 5 is provided with anti-slip protrusions and/or anti-slip depressions.

Furthermore, in the invention, the knob further comprises a sealing buckle 4, the sealing buckle 4 is positioned at one end of the connecting body 6 far away from the inner core and is connected with the connecting body 6 in a clamping manner, and the sealing part can be matched to protect two ends of the movable limiting device 3.

Furthermore, as a protection measure, in the invention, the first connecting piece 1 is provided with a limiting protrusion, the knob is provided with a limiting notch, and the limiting protrusion is matched with the limiting notch, so that the rotation range of the movable limiting device 3 can be limited, and the movable limiting device 3 is prevented from being damaged due to an overlarge torsion angle.

As shown in fig. 1 to 6, the working process of the present invention is explained in detail as follows:

when the rotatable and locked movable joint is applied to a baby carriage, the joint is arranged at the movable connection part of the frame, so that the frame can be rotated and folded, and the locking effect can be realized when the frame is unfolded. When the baby carriage needs to be stored, the knob is rotated, the core shaft 8 stirs the clamping groove of the sliding block 9 sliding out of the second connecting piece 2, at the moment, the second connecting piece 2 rotates a certain angle (for example, 5 degrees) slightly due to the action of gravity or manual stirring, the knob can be loosened, and the second connecting piece 2 can be freely rotated to store the baby carriage.

At the instant when the user releases the knob, the knob returns to the initial position (the state when it is not rotated) by the action of the return means 7 (torsion spring).

When the second connecting piece 2 is not in the spreading state, the elastic strip connected with the sliding block 9 is always in a pressed state. When the second connecting piece 2 moves to the opening position (the sliding block 9 is right opposite to the corresponding clamping groove), the sliding block 9 automatically enters the clamping groove under stress, and the second connecting piece 2 is locked.

When the knob is rotated, the knob is provided with the limiting notch, the first connecting piece 1 is provided with the limiting protrusion, and the limiting protrusion can only swing within the range of the limiting notch, so that the maximum angle when the knob is rotated can be limited, and the movable limiting device 3 is protected.

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

1. A rotatable and lockable mobile joint comprising a first connection and a second connection, characterized in that:

the locking device comprises a first connecting piece and a second connecting piece, and 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 radial 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 shell and an inner core; the shell is fixedly connected with the first connecting piece and rotatably connected with the second connecting piece; the inner core is positioned in the outer shell and protrudes out of the outer shell, and the inner core is used for generating radial displacement when rotating so as to rotate or lock the second connecting piece.

3. The rotatable and lockable mobile joint according to claim 2, characterized in that:

the housing includes a side chamber and a communication hole; the side chamber is positioned on the side wall of the shell, and the communication hole is communicated with the side chamber;

the inner core comprises a mandrel and a sliding block; the sliding block is in sliding fit with the side cavity, and an accommodating cavity is formed in the sliding block; the periphery of the mandrel is provided with a convex part and a matching part, the mandrel is inserted into the communicating hole and the containing cavity in a penetrating mode, the matching part is rotatably connected with the communicating hole, the convex part is in contact with the inner wall of the containing cavity, and the outline of the containing cavity is larger than that of the convex part.

4. The rotatable and lockable mobile joint according to claim 3, characterized in that:

the sliding block is provided with a guide groove, the shell is provided with a guide strip, and the guide groove is in sliding fit with the guide strip;

in the sliding direction of the sliding block, an elastic strip which can be elastically deformed and is always in a pressed state is arranged between the sliding block and the shell;

preferably, the elastic strip is any one of a rubber strip, a compression spring and a plate spring.

5. 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 shell, a connecting hole is formed in the connecting arm, and the connecting hole is connected with two ends of the shell in a clamping mode;

preferably, the connecting hole is provided with an anti-rotation clamping block, the two ends of the shell are provided with clamping jaws, and the anti-rotation clamping block is connected with the clamping jaws in a clamping mode.

6. The rotatable and lockable mobile joint according to claim 5, characterized in that:

the connecting holes comprise a first hole and a second hole, and the number of the anti-rotation clamping blocks on the first hole is less than that of the anti-rotation clamping blocks on the second hole;

a sealing element is arranged on the second hole;

preferably, the seal is snap-fit with the second aperture.

7. The rotatable and lockable mobile joint according to claim 2, characterized in that:

the second connecting piece is provided with a sleeve hole, and the side wall of the sleeve hole is provided with a clamping groove;

the shell is located in the sleeve hole, and is rotatably connected with the sleeve hole, and the clamping groove is used for being connected with the inner core in a clamping mode.

8. The rotatable and lockable mobile joint according to claim 2, characterized in that:

the resetting device is arranged on the inner core, is connected with the shell and is used for driving the inner core to reset when the inner core displaces;

preferably, the return means is any one of a torsion spring, an extension spring, a compression spring, a rubber strip or a combination thereof.

9. The rotatable and lockable mobile joint according to claim 8, characterized in that:

the knob is connected with one end of the inner core and is used for providing a position for rotating the inner core;

preferably, the knob comprises a connecting body and an outer sleeve; the connecting body is fixedly connected with one end of the inner core, 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 inner core, and 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.

10. The rotatable and lockable mobile joint according to claim 9, characterized in that:

the first connecting piece is provided with a limiting bulge, the knob is provided with a limiting notch, and the limiting bulge is matched with the limiting notch and used for limiting the rotation range of the movable limiting device.