Rotating shaft device with rotating shaft power assisting structure

Abstract

The utility model belongs to the technical field of rotating structures, and particularly relates to a rotating shaft device with a rotating shaft power assisting structure, which comprises two rotating shafts (1) parallel to each other, a transmission mechanism (2), a self-locking mechanism (3) respectively connected with the two rotating shafts, and two groups of elastic components (4) respectively arranged on the two rotating shafts (1) and used for pressing the self-locking mechanism, one end of each rotating shaft is provided with an adapter plate (5), and the two adapter plates are respectively connected with two mutually rotating parts on a product; the two groups of power assisting structures (6) are respectively arranged at the other end parts of the two rotating shafts (1) and are connected with the rotating shafts; therefore, compared with the prior art, the falling angle of a product part connected with the rotating shaft in the self-locking process is smaller, and the user experience effect is better; in a non-self-locking state, the power assisting structure can balance the gravity of a part connected with the rotating shaft, so that the part is kept stable in any structure; meanwhile, the technical effects that the transmission mechanism runs smoothly and is convenient to use are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotating structures, and specifically refers to an extension product for a tablet computer, such as a rotating shaft device provided with a rotating shaft assist structure for realizing relative rotation of two connected components on an external keyboard of a tablet computer. Background Art

[0002] The device currently used for realizing relative rotation of two components on the extension products of electronic products includes two mutually parallel rotating shafts, such as an external keyboard for a tablet computer; two sets of elastic components respectively arranged on the two rotating shafts, a self-locking component connected to the two rotating shafts, and a transmission component; the self-locking component currently used includes a concave wheel piece and two cam pieces, and a self-locking groove is provided in one of the surfaces of the two ends of the concave wheel piece for realizing self-locking with the protrusions of the two cam pieces respectively; during the relative rotation of the two rotating shafts, the cam piece contacts the corresponding self-locking position on the concave wheel piece, that is, when entering the critical state of self-locking, under the extrusion of the elastic component, the cam piece combines with the self-locking groove of the concave wheel piece to realize self-locking; obviously, in the critical state, The surface area of ​​the cam plate in contact with the concave wheel plate is the smallest, that is, the friction surface of the cam plate in contact with the concave wheel plate becomes smaller, so the torque is also minimized. Under the action of gravity of the two components connected to the two rotating shafts or one of the components, the components will drop (that is, one of the components rotates relative to the other component). In order to reduce the descending angle of the components during the self-locking process, it is necessary to reduce the opening angle of the cam plate, that is, the length of the contact surface of the cam plate and the concave wheel plate. However, when the opening angle is reduced, the friction area between the cam plate and the concave wheel plate in the open state (that is, the non-self-locking state) is reduced, thereby reducing the torque. One of the components drops under the action of gravity, so that the component cannot be in a stable state. Therefore, the current self-locking assembly is inconvenient to use. The elastic component here includes a columnar elastic member mounted on the rotating shaft. When assembled, one end of the two columnar elastic members respectively presses against the two end portions of the locking component. The degree of compression of the columnar elastic member on the self-locking component directly affects the self-locking force of the self-locking component. The self-locking component is in direct contact with the transmission component. With this structure, when the elastic component presses the self-locking component, the transmission component is also pressed at the same time, that is, there is no gap between the self-locking component and the transmission component here. The elastic component pushes the self-locking component to achieve self-locking while also pressing the transmission component. Therefore, it affects both the operation of the transmission component and the self-locking effect. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the present invention aims to provide a rotating shaft device provided with a rotating shaft assist structure.

[0004] The technical scheme is as follows: a rotating shaft device provided with rotating shaft assisting structure, comprising: two mutually parallel rotating shafts, a transmission mechanism for keeping the two rotating shafts synchronous rotation, respectively connected with the two rotating shafts, a self-locking mechanism, respectively connected with the two rotating shafts, two groups of elastic components respectively arranged on the two rotating shafts for pressing the self-locking mechanism, one end of each rotating shaft is provided with a rotating plate, the two rotating plates are respectively connected with two mutually rotating parts on a product; further comprising two groups of assisting structure respectively arranged on the other end of the two rotating shafts and connected with the rotating shafts.

[0005] Preferably, the assisting structure comprises a torsion spring arranged along the rotating shaft and one end of which is connected with the rotating shaft.

[0006] Preferably, the assisting structure further comprises a rotating cylinder connected with the other end of the rotating shaft and arranged along the rotating shaft, a rotating rod connected with the other end of the rotating cylinder and arranged along the rotating cylinder, a first rotating sheet sleeved on the other end of the rotating shaft and synchronous rotation with the rotating shaft, a second rotating sheet sleeved on the other end of the rotating rod and synchronous rotation with the rotating rod; the torsion spring is sleeved on the rotating cylinder and the claws at both ends of the torsion spring are respectively connected with the first rotating sheet and the second rotating sheet; when the angle between the two rotating plates is 180 degrees, the torsion spring is in the original state.

[0007] Preferably, further comprising two first connecting plates, one end of one of the first connecting plates is sleeved on the other end of the two rotating rods, and the other end of the other first connecting plate is sleeved on the other end of the two rotating shafts; the first rotating sheet and the second rotating sheet of the same group of assisting structure are respectively attached to the inner surface of one end of the two first connecting plates.

[0008] Preferably, the self-locking mechanism comprises two cam sheets sleeved on the two rotating shafts, and a concave sheet connected with the two rotating shafts at both ends; one surface of each end of the concave sheet is provided with two groups of self-locking grooves, and one surface of each cam sheet is provided with a protrusion corresponding to the two groups of self-locking grooves on one end of the concave sheet; one of the cam sheets is self-locked with one end of the concave sheet in the initial state; during the process from the initial state to 360 degrees rotation, the one cam sheet is self-locked with one end of the concave sheet twice.

[0009] Preferably, each end of the concave sheet is provided with a first shaft hole for the two rotating shafts to pass through; the two groups of self-locking grooves arranged on the surface of the two ends of the concave sheet are respectively located on the two sides of the corresponding first shaft hole.

[0010] Preferably, each group of self-locking grooves comprises an outer groove and an inner groove which are in communication with each other; the protrusion comprises an outer protrusion and an inner protrusion which correspond to the outer groove and the inner groove when self-locked; the two side surfaces of the outer protrusion and the inner protrusion are both inclined surfaces.

[0011] Preferably, the cam piece is provided with a second shaft hole through which the rotating shaft passes, and the outer protrusion and the inner protrusion are respectively located on two sides of the second shaft hole; the outer surface of the outer protrusion is flush with the outer circumferential surface of the cam piece, and the inner surface of the inner protrusion is flush with the inner wall of the second shaft hole.

[0012] Preferably, the two rotating shafts are rotatable relative to the two end portions of the concave cam piece; the two cam pieces are respectively connected to the two rotating shafts; the interval angle between the outer protrusion and the inner protrusion on the same cam piece is 180 degrees; and the two groups of self-locking grooves in any one surface of the end portion of the concave cam piece correspond to the outer protrusion and the inner protrusion on the same cam piece.

[0013] Preferably, the outer groove comprises an outer bottom surface provided in the surface of one end portion of the concave cam piece and two outer inclined surfaces respectively provided on two sides of the outer bottom surface; the inner groove comprises an inner bottom surface provided in the surface of one end portion of the concave cam piece and two inner inclined surfaces respectively provided on two sides of the inner bottom surface; and the two outer inclined surfaces are staggered with the two inner inclined surfaces.

[0014] Preferably, the transmission mechanism further comprises six first friction pieces uniformly sleeved on the two rotating shafts, two first connecting pieces respectively connected to the two rotating shafts, three first friction pieces on each rotating shaft abutting against the other surface of one end portion of the concave cam piece and the back surface of one end portion of the two first connecting pieces; and two second friction pieces sleeved on the two rotating shafts, one surface of each second friction piece abutting against the other surface of the two cam pieces; the other surface of the two cam pieces is provided with two limiting protrusions, and the edge of the second friction piece is provided with two limiting notches for embedding the two limiting protrusions.

[0015] Preferably, each group of elastic components comprises a columnar elastic piece sleeved on one of the rotating shafts, a first gasket and a locking nut; one end of the columnar elastic piece abuts against the other surface of the second friction piece, and the other end of the columnar elastic piece abuts against the first gasket; and the first gasket is located between the other end of the columnar elastic piece and the locking nut.

[0016] Preferably, the self-locking mechanism is located between the transmission mechanism and the two groups of elastic components, and the two rotating shafts are respectively provided with a step portion for limiting the self-locking mechanism between the transmission mechanism and the self-locking mechanism; and the transmission mechanism and the self-locking mechanism are separated.

[0017] Preferably, the transmission mechanism comprises two mounting plates vertically connected to the two rotating shafts and parallel to each other, two transmission shafts parallel to the two rotating shafts and located between the two mounting plates, two outer gears sleeved on the two rotating shafts and located between the two mounting plates, and two inner gears sleeved on the two transmission shafts and meshing with each other; the two inner gears are respectively meshed with the outer gears adjacent thereto; and the two ends of the two transmission shafts are respectively connected to the two mounting plates.

[0018] Preferably, two second gaskets respectively abutting against the stepped surfaces on the two rotating shafts are further sleeved on the two rotating shafts, and the two second gaskets respectively abut against the back surfaces of the two ends of one of the mounting plates.

[0019] Technical effects: the two rotating shafts of the rotating shaft device are provided with two groups of power assisting structures connected with the rotating shafts at the other ends; if the angle between the two adapter plates is 180 degrees, it is the original state of the torsion spring, and the two ends of the torsion spring are not stretched and deformed at this time; the two adapter plates are connected with two components on the product which rotate relative to each other; on this basis, the two rotating shafts rotate relative to each other, that is, the angle between the two adapter plates changes from 180-0 degrees or 180-360 degrees, when the cam plate and the corresponding self-locking position on the concave wheel plate are in contact, that is, the self-locking critical state is entered, the surface of the cam plate in contact with the concave wheel plate is the smallest, that is, the friction surface of the cam plate in contact with the concave wheel plate is smaller, so the torsion is also the smallest, under the action of the gravity of the two components or one of the components, the component will descend (that is, one of the components rotates relative to the other component), and the opening angle of the cam plate can be reduced to reduce the descending angle of the component, and the friction area of the cam plate and the concave wheel plate in the open state (that is, the non-self-locking state) is reduced, thereby reducing the torsion, and further causing the instability of the relative rotating components, and the reverse torsion (opposite to the direction of the gravity of the component) generated by the deformation of the torsion spring balances, that is, the power assisting structure mainly provides reverse power assistance for the rotating shaft; the self-locking mechanism is located between the transmission mechanism and the two groups of elastic components, the two rotating shafts are provided with stepped portions between the transmission mechanism and the self-locking mechanism for limiting the self-locking mechanism, the transmission mechanism and the self-locking mechanism are separated, so when the rotating lock nut adjusts the tightness of the elastic component to the self-locking mechanism, the pressure of the elastic component will not compress the transmission mechanism through the self-locking mechanism, thereby affecting the smoothness of the operation of the transmission mechanism; therefore, compared with the prior art, the component connected with the rotating shaft during the self-locking process has a smaller descending angle, and the user experience effect is better; in the non-self-locking state, the power assisting structure can balance the gravity of the component connected with the rotating shaft to keep the component stable in any structure; meanwhile, the transmission mechanism operates smoothly and is convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a front view of the initial state of the rotating shaft device of the embodiment of the utility model;

[0021] Figure 2 It is a perspective view of the initial state of the rotating shaft device of the embodiment of the utility model;

[0022] Figure 3 It is another perspective view of the initial state of the rotating shaft device of the embodiment of the utility model;

[0023] Figure 4 is a front view of the two rotating shafts relative rotation 360 degrees of the utility model embodiment;

[0024] Figure 5 is a perspective view of the two rotating shafts relative rotation 360 degrees of the utility model embodiment;

[0025] Figure 6 is another perspective view of the two rotating shafts relative rotation 360 degrees of the utility model embodiment;

[0026] Figure 7 is the explosion drawing of the rotating shaft device initial state of the utility model embodiment;

[0027] Figure 8 is another perspective view of the rotating shaft device initial state of the utility model embodiment;

[0028] Figure 9 is the perspective view of the cam piece of the utility model embodiment;

[0029] Figure 10 is the front view of the cam piece of the utility model embodiment;

[0030] Figure 11 is the left view of the cam piece of the utility model embodiment;

[0031] Figure 12 is the perspective view of the concave wheel piece of the utility model embodiment;

[0032] Figure 13 is the front view of the concave wheel piece of the utility model embodiment;

[0033] Figure 14 is the left view of the concave wheel piece of the utility model embodiment;

[0034] Figure 15 is the perspective view of the two rotating shafts relative rotation 180 degrees of the utility model embodiment;

[0035] Figure 16 is the schematic view of the external protrusion and the external groove combination of the utility model embodiment;

[0036] Figure 17 is the critical state schematic view before the external protrusion and the external groove combination of the utility model embodiment.

[0037] The figure mark: the pivot-1, the step part 101, the step surface 102, the transmission mechanism-2, the mounting plate-201, the transmission shaft-202, the external gear-203, the internal gear-204, the self-locking mechanism-3, the friction surface-3A, the cam piece-301, the external protrusion-301a, the internal protrusion-301b, the second shaft through hole-301c, the limiting protrusion 301d, the concave cam-302, the first shaft through hole-302a, the external groove-302b, the external bottom surface-3021b, the external inclined surface-3022b, the internal groove-302c, the internal bottom surface-3021c, the internal inclined surface-3022c, the elastic assembly-4, the cylindrical elastic piece-401, the first gasket-402, the locking nut-403, the adapter plate-5, the power assisting structure-6, the torsion spring 601, the claw part 601a, the adapter cylinder 602, the adapter rod 603, the first rotating piece 604, the second rotating piece 605, the first connecting plate 7, the first friction piece-8, the second friction piece-9, the limiting notch 901, the snap spring 10, the second gasket 11, the first connecting piece-12. DETAILED DESCRIPTION

[0038] In order to make the personnel in the technical field better understand the utility model scheme, the utility model is further explained in detail below in combination with the drawings and embodiments.

[0039] As Figures 1-8 The utility model embodiment provides a pivot device with pivot power assisting structure, it includes: two mutually parallel pivot 1, respectively with two pivot connection for keeping synchronous rotation of both transmission mechanism 2, respectively with two pivot connection self-locking mechanism 3, two groups are respectively arranged on two pivot 1 for the elastic assembly 4 of compressing self-locking mechanism, one end of each pivot is equipped with an adapter plate 5, two adapter plates are connected with two mutually rotating parts (not shown) on the product respectively, the product here refers to the product using pivot device, still includes two groups of power assisting structure 6 that are respectively arranged on the other end of two pivot 1 and are connected with pivot.

[0040] Specifically, the power assisting structure 6 includes a torsion spring 601 along the pivot axial arrangement and one end is connected with the pivot 1. The power assisting structure 6 further includes an adapter cylinder 602, one end is connected with the other end of the pivot 1 and along the pivot axial arrangement, an adapter rod 603, one end is connected with the other end of the adapter cylinder and along the adapter cylinder axial arrangement, a first rotating piece 604, which is sleeved on the other end of the pivot 1 and synchronously rotates, a second rotating piece 605, which is sleeved on the other end of the adapter rod and synchronously rotates, the claw part 601a of the both ends of the torsion spring 601 is connected with the first rotating piece and the second rotating piece respectively, as Figure 15As shown, the angle between the two adapter plates 5 is 180 degrees, the torsion spring is in the original state, that is, the two ends of the torsion spring are not stretched and deformed; on this basis, the two shafts 1 are further rotated, that is, the angle between the two adapter plates is from 180 to 0 degrees or 180 to 360 degrees, the first rotating plate 604 rotates, and one end of the torsion spring 601 connected with the first rotating plate 604 is stretched and deformed to generate a torsion force.

[0041] In order to install the assisting structure 6, two first connecting plates 7 are further included, one end of one of the first connecting plates is sleeved on the other end of the two adapter rods 603, and the other end of the other first connecting plate is sleeved on the other end of the two shafts 1; the first rotating plate 604 and the second rotating plate 605 of the same assisting structure are respectively attached to the inner surface of one end of the two first connecting plates 7; here, a clamping spring 10 for fixing the first rotating plate 604 on the shaft and fixing the second rotating plate 605 on the adapter rod 603 is further arranged on the other end of each shaft 1 and the adapter rod 603.

[0042] In this embodiment, as shown in the figure, Figures 6-8 The self-locking mechanism 3 is located between the transmission mechanism 2 and the two groups of elastic components 4, and a step portion 101 for limiting the self-locking mechanism 3 is arranged on each of the two shafts 1 between the transmission mechanism and the self-locking mechanism; the transmission mechanism and the self-locking mechanism are separated. With this structure, when the tightness of the elastic component 4 is adjusted, the pressure of the elastic component will not be transmitted to the transmission mechanism 2 through the self-locking mechanism 3, thereby affecting the smoothness of the transmission mechanism, especially when the designed torsion force is large enough, the transmission mechanism is prevented from being stuck.

[0043] As shown in the figure, Figures 1-8 The transmission mechanism 2 includes two mounting plates 201 which are vertically connected to the two shafts 1 and parallel to each other, two transmission shafts 202 which are arranged between the two mounting plates and parallel to the two shafts, two outer gears 203 which are sleeved on the two shafts and located between the two mounting plates, and two inner gears 204 which are sleeved on the two transmission shafts and meshed with each other; the two inner gears are meshed with the outer gears adjacent thereto; the two ends of the two transmission shafts 202 are connected to the two mounting plates 201.

[0044] Two second spacers 11 are further sleeved on the two shafts 1, and the two second spacers are respectively in contact with the step faces 102 arranged on the two shafts.

[0045] As shown in the figure, Figures 1-8As shown, the self-locking mechanism 3 includes two cam pieces 301 respectively mounted on the two rotating shafts 1, and concave wheel pieces 302 connected to the two rotating shafts at both ends; two sets of self-locking grooves are provided on one surface of each end of the concave wheel piece, and a protrusion corresponding to the two sets of self-locking grooves on one end of the concave wheel piece is provided on one surface of each cam piece 301; one of the cam pieces 301 is self-locked with one end of the concave wheel piece in the initial state, and during the process of rotating 360 degrees, one of the cam pieces 301 and one end of the concave wheel piece are self-locked twice. Figures 1-3 As shown, it means that the two shafts are in the initial state, the two adapter plates 5 are parallel to each other, and the angle between them is 0 degrees; Figure 14 As shown, the two shafts rotate 90 degrees in opposite directions, that is, one shaft 1 rotates 90 degrees clockwise / counterclockwise, and the other shaft 1 rotates 90 degrees counterclockwise / clockwise under the drive of the transmission mechanism 2. At this time, the two adapter plates 5 are located in the same plane, and the angle between them is 180 degrees. One of the cam plates 301 is not engaged with one end of the concave wheel plate, so it cannot be self-locking; Figures 4-6 As shown, the two rotating shafts 1 continue to rotate 90 degrees in opposite directions, that is, one of the rotating shafts 1 rotates 180 degrees in total clockwise / counterclockwise, and driven by the transmission mechanism 2, the other rotating shaft 1 rotates 180 degrees in counterclockwise / clockwise. At this time, the angle between the two adapter plates 5 is 360 degrees, and the two cam pieces 301 are respectively combined with the two ends of the concave wheel piece, realizing self-locking again; that is, in the process from the angle between the two adapter plates 5 being 0 degrees (initial state) to the angle between the two adapter plates 5 being 360 degrees, the two cam pieces 301 are respectively combined with the two ends of the concave wheel piece 302 twice, realizing self-locking twice.

[0046] like Figures 12-14 As shown, each end of the concave wheel plate 302 is provided with a first shaft through-hole 302a, for each of the two rotating shafts 1 to pass through. Two sets of self-locking grooves are provided on the surfaces of the concave wheel plate at each end, located on either side of the corresponding first shaft through-hole. In this embodiment, the two sets of self-locking grooves are symmetrically arranged about the axis of the first shaft through-hole 302a; the first shaft through-hole 302a is circular.

[0047] Obviously, in this embodiment, the two ends of the concave wheel plate 302 are respectively connected to the two rotating shafts 1. Therefore, the two rotating shafts 1 can rotate relative to the two ends of the concave wheel plate 302, but the concave wheel plate as a whole will not rotate, and only the two cam plates 301 can rotate synchronously with the two rotating shafts 1 respectively, that is, the cam plates rotate relative to the concave wheel plate; for those skilled in the art, the two cam plates can also be replaced by concave wheel plates, that is, their structure is changed, and self-locking grooves are set therein, and correspondingly, protrusions are set on the surfaces of the two ends of the original concave wheel plate to cooperate with the self-locking grooves, which can also achieve a self-locking effect.

[0048] likeFigures 12-14 As shown, in this embodiment, each group of self-locking grooves includes an outer groove 302b and an inner groove 302c that are connected to each other; the protrusions include an outer protrusion 301a and an inner protrusion 301b that correspond to the outer groove 302b and the inner groove 302c respectively when self-locking; both side surfaces of the outer protrusion 301a and the inner protrusion 301b are inclined surfaces.

[0049] like Figures 9-11 As shown, the cam plate 301 is provided with a second shaft through-hole 301c for the shaft 1 to pass through. The outer protrusion 301a and the inner protrusion 301b are located on either side of the second shaft through-hole. The outer surface of the outer protrusion is flush with the outer circumference of the cam plate 301, and the inner surface of the inner protrusion is flush with the inner wall of the second shaft through-hole 301c. The cross-section of the second shaft through-hole 301c is runway-shaped, and the portion of the shaft 1 inserted into the second shaft through-hole is flat, so as to achieve synchronous rotation of the shaft 1 and the cam plate 301. Figure 15 , which is a schematic diagram showing the combination of the outer protrusion 301a and the outer groove 302b.

[0050] With this structure, the two rotating shafts 1 can rotate relative to the ends of the concave wheel plate 302; the two cam plates 301 maintain a linkage with the two rotating shafts. In this embodiment, the outer protrusion 301a and inner protrusion 301b on the same cam plate 301 are spaced 180 degrees apart. The two sets of self-locking grooves on one surface of either end of the concave wheel plate 302 correspond to the outer protrusion and inner protrusion on the corresponding cam plate, respectively. Here, "the corresponding cam plate" refers to the cam plate that self-locks with the two sets of self-locking grooves on one surface of either end of the concave wheel plate 302.

[0051] like Figures 12-14 As shown, the outer groove 302b includes an outer bottom surface 3021b provided in one end surface of the concave wheel plate 302 and two outer inclined surfaces 3022b provided on both sides of the outer bottom surface; the inner groove 302c includes an inner bottom surface 3021c provided in one end surface of the concave wheel plate 302 and two inner inclined surfaces 3022c provided on both sides of the outer bottom surface; the two outer inclined surfaces are staggered with the two inner inclined surfaces respectively. The so-called staggered means that the two outer inclined surfaces are not directly connected to the two inner inclined surfaces 3022c, and the outer bottom surface 3021b is not completely aligned with the inner bottom surface 3021c. Here, both the outer groove 302b and the inner groove 302c are provided with inclined surfaces, and both sides of the outer protrusion 301a and the inner protrusion 301b are inclined surfaces, so that when in the self-locking state, the outer protrusion 301a is easily disengaged from the outer groove 302b and the inner protrusion 301b is easily disengaged from the inner groove 302c to avoid being stuck, and when in the non-self-locking state, the outer protrusion 301a enters the outer groove 302b and the inner protrusion 301b enters the inner groove 302c to achieve self-locking. Figure 16As shown, in the non-self-locking state, the outer protrusion 301a is in a critical state relative to the outer groove 302b. At this time, the outer protrusion 301a and the outer groove 302b are not combined together, but in this state, under the extrusion of the elastic component 4, the outer protrusion 301a automatically enters the outer groove 302b and forms a self-locking stable state.

[0052] like Figures 9-11 As shown, in this embodiment, the protrusion includes an outer protrusion 301a and an inner protrusion 301b. Therefore, in the self-locking state, the outer protrusion 301a and the inner protrusion 301b on one cam piece 301 are respectively combined with two groups of self-locking grooves in one end surface of the cam wheel piece 302. Specifically, the outer protrusion 301a is combined with the outer groove 302b of one group of self-locking grooves, and the inner protrusion 301b is combined with the inner groove 302c of the other group of self-locking grooves. Obviously, only one outer protrusion 301a or one inner protrusion 301b is provided, and correspondingly, only one outer groove 302b or inner groove 302c is provided in each group of self-locking grooves, so that the outer protrusion 301a or the inner protrusion 301b is respectively combined with the outer groove 302b or the inner groove 302c in the initial position, and after rotating a certain angle, the outer protrusion 301a or the inner protrusion 301b is correspondingly combined with the outer groove 302b or the inner groove 302c to achieve self-locking, which can also achieve the purpose of self-locking. However, it is obvious that the stability of self-locking when only one outer protrusion 301a or one inner protrusion 301b is provided is not as good as when both the outer protrusion 301a and the inner protrusion 301b are provided.

[0053] like Figures 1-8 As shown, it also includes six first friction plates 8 evenly sleeved on the two rotating shafts 1 and two first connecting plates 12 connected to the two rotating shafts 1 at both ends; the three first friction plates 8 on each rotating shaft 1 are respectively in contact with the other surface of one end of the concave wheel plate 302 and the back surface of one end of the two first connecting plates 12, that is, each rotating shaft 1 is sleeved with three first friction plates 8 linked (rotating synchronously) therewith, and the other surface of one end of the concave wheel plate 302 and the back surface of one end of each first connecting plate 12 are in contact with one first friction plate 8. It is clear that the so-called "other surface" of one end of the concave wheel plate 302 here corresponds to the surface of one end of the concave wheel plate 302 provided with the self-locking groove. It also includes two second friction plates 9, which are respectively mounted on the two rotating shafts 1, and one surface of each of the second friction plates abuts the other surface of the two cam plates 301. The other surfaces of the two cam plates 301 are provided with two limiting protrusions 301d, and the edges of the second friction plates 9 are provided with two limiting notches 901 for respectively receiving the two limiting protrusions 301d. The first friction plates 8 and the second friction plates 9 are used to distribute the friction between the cam plate 301 and the concave wheel plate 302.

[0054] Each elastic assembly 4 comprises a cylindrical elastic piece 401, a first gasket 402 and a locking nut 403 sleeved on one of the rotating shafts 1. One end of the cylindrical elastic piece abuts against the other surface of the second friction plate 9, and the other end abuts against the first gasket. The first gasket 402 is located between the other end of the cylindrical elastic piece 401 and the locking nut 403.

[0055] The rotating locking nut 403 can adjust the tightness of the cylindrical elastic piece 401. The two ends of the two transmission shafts 202 are respectively connected with the two mounting plates 201. That is, when the rotating locking nut 403 is rotated, the pressure of the cam plate 301 relative to the two end portions of the concave plate can be adjusted by compressing or loosening the cylindrical elastic piece 401, so as to adjust the self-locking force. After assembly, the two first friction plates 8 located at the outermost sides are respectively sleeved on the two rotating shafts 1 and are respectively limited by the two stepped portions 101, that is, the whole self-locking mechanism 3 is limited, so that the self-locking mechanism and the transmission mechanism are separated. Therefore, when the tightness of the elastic assembly is adjusted by rotating the self-locking nut to further adjust the pressure of the cam plate 301 relative to the two end portions of the concave plate, the transmission mechanism 2 will not be squeezed, so as to ensure smooth rotation of each gear of the transmission mechanism.

[0056] As shown in FIG. 1, the self-locking mechanism 3 comprises two first friction plates 8, two second friction plates 9, two elastic assemblies 4 and a self-locking nut 5. Figures 1-8As shown, in the initial state, the protrusions on each cam plate 301 are combined with one set of self-locking grooves on one end of the concave plate to achieve self-locking. In this embodiment, specifically, the outer protrusion 301a and the inner protrusion 301b on one of the cam plates 301 are combined with two sets of self-locking grooves on the surface of one end of the concave plate 302, i.e., the outer protrusion 301a is combined with the outer groove 302b of one set of self-locking grooves, and the inner protrusion 301b is combined with the inner groove 302c of the other set of self-locking grooves. In use, rotating one of the components connected to any one of the shafts, the other shaft 1 is driven to rotate synchronously by the transmission mechanism 2. At this time, the two cam plates 301 rotate synchronously with the two shafts 1 relative to the two ends of the concave plate 302. After rotating by a certain angle, for example, 180 degrees, the protrusions on each cam plate 301 reach the other set of self-locking grooves on one end of the concave plate 302 and are combined to achieve self-locking. Specifically, the outer protrusion 301a is combined with the outer groove 302b of the other set of self-locking grooves in the initial state, and the inner protrusion 301b is combined with the inner groove 302c of one set of self-locking grooves in the initial state. That is, the self-locking positions of the outer protrusion 301a and the inner protrusion 301b of each cam plate 301 have been exchanged. For example, the two sets of self-locking grooves on each end of the concave plate 302 are defined as self-locking groove A and self-locking groove B. Assuming that in the initial state, the outer protrusion 301a and the inner protrusion 301b of each cam plate 301 are combined with the outer groove 302b of the self-locking groove A and the inner groove 302c of the self-locking groove B and are self-locked, and then self-locked again, the outer protrusion 301a and the inner protrusion 301b of the cam plate are combined with the outer groove 302b of the self-locking groove B and the inner groove 302c of the self-locking groove A and are self-locked, i.e., the outer protrusion 301a and the inner protrusion 301b of each cam plate 301 are combined with the self-locking positions of the two sets of self-locking grooves on each end of the concave plate 302. During the relative rotation of 360 degrees, self-locking is achieved again, so that twice self-locking is achieved in the process. During the self-locking process, the two shafts 1 will not rotate relative to each other without sufficient external force, so the components connected to the two shafts 1 remain stationary to meet the use requirements, such as the need to keep the angle of one component relative to the other component unchanged, so that twice self-locking is more convenient to use than once self-locking.

[0057] In conclusion, if the angle between the two adapter plates 5 is 180 degrees, which is the original state of the torsion spring 601, the two ends of the torsion spring are not stretched and deformed at this time, the two adapter plates 5 are connected with the two components on the product that rotate relative to each other, and on this basis, the two shafts 1 rotate relative to each other, that is, the angle between the two adapter plates changes from 180-0 degrees or 180-360 degrees, when the cam plate 301 contacts the corresponding self-locking position on the concave cam plate 302, that is, enters the self-locking critical state, the surface of the cam plate 301 in contact with the concave cam plate 302 is the smallest, that is, the friction surface 3A of the cam plate in contact with the concave cam plate is smaller, as shown in Figure 17 , so that the torsion is also the smallest, under the action of gravity of the two components or one of the components, the components will drop (that is, one of the components rotates relative to the other component), as shown in Figure 10 , by reducing the opening angle a of the cam plate 301 (that is, the length of the friction surface 3A), the component drop angle can be reduced, at this time, the sizes of the outer protrusion 301a, the inner protrusion 301b, the outer groove 302b and the inner groove 302c are all smaller, as shown in Figure 15 , and the friction area of the cam plate 301 and the concave cam plate 302 in the open state (that is, the non-self-locking state) is reduced, thereby reducing the torsion, and further causing the relative rotating components to be unstable, and the reverse torsion (opposite to the direction of the component gravity) generated by the torsion spring deformation balances, that is, the power assisting structure 6 mainly provides reverse power assistance to the shaft 1; the self-locking mechanism 3 is located between the transmission mechanism 2 and the two groups of elastic components 4, the two shafts 1 are both provided with a step portion 101 located between the transmission mechanism 2 and the self-locking mechanism 3 and used for limiting the self-locking mechanism 3, the transmission mechanism 2 and the self-locking mechanism 3 are separated, so when the rotating locking nut 403 adjusts the tightness of the elastic component on the self-locking mechanism 3, the pressure of the elastic component 4 will not compress the transmission mechanism 2 through the self-locking mechanism 3, thereby affecting the smoothness of the transmission mechanism operation; therefore, compared with the prior art, the component connected with the shaft in the self-locking process drops at a smaller angle, and the user experience effect is better, and in the non-self-locking state, the power assisting structure can balance the gravity of the component connected with the shaft to keep the component stable in any structure; at the same time, the transmission mechanism operates smoothly and is convenient to use.

[0058] In the above description, it should be noted that the terms "mounting", "connecting", "connecting" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between the two components; "provided" should be understood as "mounted, provided", including fixed mounting, movable mounting and other mounting methods.

[0059] Obviously, the above-described embodiments are only a part of the embodiments of the present application, and are not all the embodiments. The preferred embodiments of the present application are shown in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly applied in other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A hinge device provided with a hinge assisting structure, comprising: Two mutually parallel rotating shafts (1), a transmission mechanism (2) for keeping the two rotating shafts synchronous rotation, a self-locking mechanism (3) connected with the two rotating shafts, two sets of elastic components (4) for pressing the self-locking mechanism, one end of each rotating shaft is provided with a rotating plate (5), the two rotating plates are connected with two mutually rotating parts on the product; characterized in that, further comprising two sets of power assisting structures (6) provided on the other end of the two rotating shafts (1) and connected with the rotating shafts.

2. A hinge device provided with a hinge shaft assisting structure according to claim 1, characterized in that, The power assisting structure (6) comprises a torsion spring (601) provided along the rotating shaft and connected with one end of the rotating shaft.

3. A hinge device provided with a hinge shaft assisting structure according to claim 2, characterized in that, The power assisting structure (6) further comprises a rotating cylinder (602) provided along the rotating shaft and connected with the other end of the rotating shaft (1), a rotating rod (603) provided along the rotating cylinder and connected with one end of the rotating cylinder, a first rotating sheet (604) sleeved on the other end of the rotating shaft and synchronous rotation, a second rotating sheet (605) sleeved on the other end of the rotating rod and synchronous rotation; the torsion spring (601) is sleeved on the rotating cylinder, and the claws at both ends of the torsion spring are connected with the first rotating sheet and the second rotating sheet respectively; when the angle between the two rotating plates (5) is 180 degrees, the torsion spring is in the original state.

4. The rotating shaft device provided with a rotating shaft assisting structure according to claim 3, characterized in that, Further comprising two first connecting plates (7), one end of one of the first connecting plates is sleeved on the other end of the two rotating rods (603), and the other end of the other first connecting plate is sleeved on the other end of the two rotating shafts (1); the first rotating sheet (604) and the second rotating sheet (605) of the same set of power assisting structures are respectively attached to the inner surface of one end of the two first connecting plates (7).

5. The hinge device with a hinge axis assisting structure according to claim 1, wherein The self-locking mechanism (3) comprises two cam sheets (301) sleeved on the two rotating shafts (1) and a concave cam sheet (302) connected with the two rotating shafts; one surface of each of the two cam sheets (301) is provided with two sets of self-locking grooves corresponding to the two sets of self-locking grooves on one end of the concave cam sheet; one of the cam sheets (301) is self-locked with one end of the concave cam sheet in the initial state; during the process from the initial state to 360 degrees of rotation, the cam sheet (301) is self-locked with one end of the concave cam sheet twice.

6. A hinge device provided with a hinge axis assisting structure according to claim 5, characterized in that, The two ends of the concave cam sheet (302) are respectively provided with a first shaft hole (302a) for the two rotating shafts (1) to pass through; the two sets of self-locking grooves provided on the surface of the two ends of the concave cam sheet are respectively located on the two sides of the corresponding first shaft hole.

7. A hinge device provided with a hinge axis assisting structure according to claim 6, characterized in that, Each set of self-locking grooves comprises an outer groove (302b) and an inner groove (302c) in communication with each other; the protrusion comprises an outer protrusion (301a) and an inner protrusion (301b) corresponding to the outer groove (302b) and the inner groove (302c) when self-locked; the two side surfaces of the outer protrusion (301a) and the inner protrusion (301b) are both inclined surfaces.

8. A hinge device provided with a hinge axis assisting structure according to claim 7, characterized in that, The cam piece (301) is provided with a second shaft hole (301c) for the rotating shaft (1) to pass through, and the outer protrusion (301a) and the inner protrusion (301b) are respectively located on the two sides of the second shaft hole; the outer surface of the outer protrusion is flush with the outer circumferential surface of the cam piece (301), and the inner surface of the inner protrusion is flush with the inner wall of the second shaft hole (301c).

9. The rotating shaft device with rotating shaft assistance structure according to claim 7, characterized in that, The two rotating shafts (1) can rotate relative to the two end portions of the concave cam piece (302); the two cam pieces (301) are respectively connected to the two rotating shafts; the interval angle between the outer protrusion and the inner protrusion on the same cam piece (301) is 180 degrees, and the two groups of self-locking grooves in one surface of any end portion of the concave cam piece (302) correspond to the outer protrusion and the inner protrusion on the same cam piece.

10. The rotating shaft device with rotating shaft assistance structure according to claim 7, characterized in that, The outer groove (302b) comprises an outer bottom surface (3021b) provided in one surface of one end portion of the concave cam piece (302) and two outer inclined surfaces (3022b) provided on the two sides of the outer bottom surface; the inner groove (302c) comprises an inner bottom surface (3021c) provided in one surface of one end portion of the concave cam piece (302) and two inner inclined surfaces (3022c) provided on the two sides of the outer bottom surface; the two outer inclined surfaces are staggered with the two inner inclined surfaces.

11. A hinge device provided with a hinge axis assisting structure according to claim 5, characterized in that, It also comprises six first friction pieces (8) which are uniformly sleeved on the two rotating shafts (1) and two first connecting pieces (12) which are respectively connected to the two rotating shafts (1); the three first friction pieces (8) on each rotating shaft (1) are respectively in abutment with the other surface of one end portion of the concave cam piece (302) and the back surface of one end portion of the two first connecting pieces (12); it also comprises two second friction pieces (9) which are respectively sleeved on the two rotating shafts (1) and one surface of each second friction piece is in abutment with the other surface of the two cam pieces (301); the other surface of the two cam pieces (301) is provided with two limiting protrusions (301d), and the edge of the second friction piece (9) is provided with two limiting notches (901) for embedding the two limiting protrusions (301d).

12. A hinge device provided with a hinge axis assisting structure according to claim 11, characterized in that, Each group of elastic components (4) comprises a columnar elastic member (401) sleeved on one of the rotating shafts (1), a first gasket (402) and a locking nut (403); one end of the columnar elastic member is in abutment with the other surface of the second friction piece (9), and the other end is in abutment with the first gasket; the first gasket (402) is located between the other end of the columnar elastic member (401) and the locking nut (403).

13. The rotating shaft device with rotating shaft assistance structure according to claim 1, characterized in that, The self-locking mechanism (3) is located between the transmission mechanism (2) and the two groups of elastic components (4), and the two rotating shafts (1) are each provided with a step portion (101) for limiting the self-locking mechanism (3) between the transmission mechanism and the self-locking mechanism; the transmission mechanism and the self-locking mechanism are separated.

14. A hinge device provided with a hinge axis assisting structure according to claim 13, characterized in that, The transmission mechanism (2) comprises two installation plates (201) which are respectively connected with two rotating shafts (1) perpendicularly and parallel to each other, two transmission shafts (202) which are arranged between the two installation plates and parallel to the two rotating shafts, two outer gears (203) which are respectively sleeved on the two rotating shafts and located between the two installation plates, and two inner gears (204) which are respectively sleeved on the two transmission shafts and engaged with each other; the two inner gears are respectively engaged with the outer gears adjacent to the two inner gears; the two ends of the two transmission shafts (202) are respectively connected with the two installation plates (201).

15. A hinge device provided with a hinge axis assisting structure according to claim 14, characterized in that, Two second gaskets (11) which are respectively abutted with the stepped surfaces (102) arranged on the two rotating shafts are respectively sleeved on the two rotating shafts (1); the two second gaskets are respectively abutted with the back surfaces of the two ends of one of the installation plates (201).

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