TWM577966U - Pivot device - Google Patents

Abstract

A pivot device includes a base, a rotating shaft, a rotating member, and an elastic member. The base includes a bottom plate portion and two side joint portions which are spaced apart from the top surface of the bottom plate portion, and the top cover has an engaging groove. The shaft is pivotally disposed to the side joint along a first axis of the through side joint. The rotating member includes a set of shaft portions disposed on the rotating shaft and a first pivoting portion and a second pivoting portion radially protruding from the shaft column portion. The elastic member includes a bottom rod portion rotatably disposed along the second axis and a first elastic portion and a second elastic portion extending from opposite ends of the bottom rod portion. Wherein, when the first axis, the second axis, the first pivoting portion and the second pivoting portion are non-coplanar, the first elastic portion and the second elastic portion can push the rotating member to rotate about the first axis.

Description

Pivot device

The present invention relates to a pivot device, and more particularly to a clamshell pivot device.

The hinge device is widely used in various products in daily life, such as the pivotal connection between the screen body of the tablet computer and the support stand, the pivotal connection between the box body and the cover body of the container, and the like. Among the many types of shaft devices, the shaft device with automatic opening and closing function can also be seen in some products. Such a shaft device is usually rotated by a specially designed torsion structure when the shaft device is rotated beyond a certain angle. Will produce the effect of automatic opening or automatic closing. The aforementioned torsion structure usually needs to adopt a cam mechanism to achieve automatic opening and closing. However, the cam mechanism causes the overall size of the shaft device to be large, and it is difficult to fit the thin body or the small product.

Accordingly, it is an object of the present invention to provide a pivot device that does not require the configuration of a cam mechanism.

Therefore, in some embodiments, the novel pivot device is suitable for use with a first housing and a second housing. The pivot device includes a base, a rotating shaft, a rotating member, and an elastic member. The base is adapted to be disposed on the first housing, and includes a bottom plate portion and two side joint portions protruding from a top surface of the bottom plate portion at intervals, the top cover having a joint on the side The snap groove between the parts. The shaft is pivotally mounted to the side joints along a first axis passing through the side joints. The rotating member is adapted to be coupled to the second housing, and includes a set of shaft portions disposed on the rotating shaft, and a first pivoting portion radially protruding from the same side of the shaft portion toward the base And a second pivoting portion. The elastic member includes a bottom rod portion rotatably disposed on the engaging groove along a second axis parallel to the first axis through the engaging groove, and respectively from opposite ends of the bottom rod portion a first elastic portion extending in a direction of the rotating member and a second elastic portion, the first elastic portion is elastically deformably pivotally connected to the second pivoting portion of the rotating member, and the second elastic portion is elastically deformable The ground is pivotally connected to the first pivoting portion of the rotating portion. The first elastic portion and the second elastic portion can push the rotating member when the first axis, the second axis, the first pivoting portion and the second pivoting portion are non-coplanar The first axis of the shaft is pivoted to rotate the second housing relative to the first housing.

In some embodiments, the first elastic portion has a first curved portion connected to the bottom portion and adjacent to the first pivot portion, and a first curved portion extends from the first curved portion and pivoted to the first portion a first connecting arm section of the two pivoting portions, the second elastic pressing portion has a second curved section connected to the bottom rod portion adjacent to the second pivoting portion, and a hinge extending from the second curved section And connecting to the second connecting arm segment of the first pivoting portion, the first connecting arm segment and the second connecting arm segment overlapping each other.

In some embodiments, the bottom plate portion further has a bottom surface, and the engaging groove is inclined and concave toward the bottom surface. The bottom rod portion of the elastic member is rotatably abutted by the rotating member. The bottom end of the snap groove.

In some embodiments, the base further includes two positioning portions respectively connected to the outer sides of the side joints, each positioning portion being adapted to be coupled to a fastener for being fixed to the first housing.

In some embodiments, the top surface of the bottom plate portion further has a first side, and the rotating member is pivotable relative to the base between a first position and a second position, when the rotating member is In the first position, the first pivoting portion and the second pivoting portion are adjacent to the first side of the bottom plate portion, and when the rotating member is in the second position, the first pivoting portion and the second portion are The pivoting portion is away from the first side of the bottom plate portion, and when the rotating member is pivoted from the first position toward the second position by less than a predetermined angle, the elastic member is pressed to provide a first elastic force to the first a pivoting portion and the second pivoting portion, the first elastic force pivoting the rotating member to the first position, and when the rotating member pivots beyond the predetermined angle, the elastic member is pressed to provide a first The second elastic force is applied to the first pivoting portion and the second pivoting portion, and the second elastic force causes the rotating member to pivot to the second position.

In some embodiments, each side engaging portion has a mounting hole facing the other side engaging portion, the mounting hole has a pivoting hole portion and a sliding hole portion, and both ends of the rotating shaft are respectively pivoted on the sides The pivoting holes of the mounting holes of the engaging portion, each of the side engaging portions further has a first blocking surface and a second stopping surface, and the rotating member further has two two shaft portions respectively formed on the shaft portion a blocking portion at an opposite end, wherein the blocking portions are rotatably disposed in the sliding hole portions of the mounting holes, and when the rotating member is in the first position, each of the blocking portions abuts on each side engaging portion The first stopping surface, and when the rotating member is in the second position, each of the blocking portions abuts against the second blocking surface of each side engaging portion.

In some implementations, the top surface of the bottom plate portion further has a second side opposite to the first side edge, the top surface extending upward from the first side edge to the second side edge in an arc The first pivoting portion and the second pivoting portion pivot along the pivoting path along the top surface, and when the rotating member is in the first position, the first pivoting portion and the second pivoting portion The portion is adjacent to the first side of the top surface, and when the rotating member is in the second position, the first pivoting portion and the second pivoting portion are adjacent to the second side of the top surface.

In some embodiments, the rotating member is pivoted from the first position to the second position along a first rotational direction, and the elastic member is axially opposite to the first rotation. The second direction of rotation of the direction is rotated.

In some implementations, when the rotating member is pivoted to the predetermined angle, the first axis, the second axis, the first pivoting portion, and the second pivoting portion are coplanar, and the elastic member is applied The elastic direction of the first pivoting portion and the second pivoting portion passes through the rotating shaft.

In some embodiments, the second housing has a pivoting side and an opening and closing side at opposite positions, the bottom plate portion of the base is disposed on the first housing, and the rotating member further includes a The shaft portion extends radially opposite to a side of the first pivot portion and the second pivot portion and is adapted to connect the connecting portion of the pivoting side of the second housing, and when the rotating member is In the first position, the opening and closing side of the second housing is adjacent to the first housing, and when the rotating member is in the second position, the opening and closing side of the second housing is away from the first housing.

In some implementations, the predetermined angle is 30 degrees.

The present invention has at least the following effects: compared with the existing shaft device, the design of the cam mechanism needs to be matched with the cam mechanism. The pivot device directly interlocks the elastic member by the rotating member, and when the rotating member is rotated to different angles, the elastic member synchronizes with the rotation. The pivoting of the piece causes the elastic force to be applied to the rotating member to change the direction of the elastic force, resulting in two different directions of torque, thereby achieving the effect of automatically opening and closing without the need of a cam mechanism, so that the pivot device can be fitted to Lightweight body or small size product.

Referring to FIGS. 1 through 3, an embodiment of the present pivot device 100 is adapted for use with a first housing 8 and a second housing 9. The first housing 8 has an accommodating space 81. The second housing 9 has a pivoting side 91 and an opening and closing side 92 at opposite positions. In this embodiment, the first housing 8 and the second housing 9 are illustrated by a case of a headphone case and a cover body. The receiving space 81 is suitable for accommodating items such as earphones. However, in other implementations, the first housing 8 and the second housing 9 may also be a box body and a cover body of a container of other types of articles, or a screen casing and a support plate of the tablet computer, and This embodiment is limited.

Referring to FIG. 4 to FIG. 6 , the pivot device 100 includes a base 1 , a rotating shaft 2 , a rotating member 3 , and an elastic member 4 .

The base 1 is disposed on the first housing 8 and includes a bottom plate portion 11 , two side joint portions 12 that are spaced apart from the bottom plate portion 11 , and two are respectively connected to the side joint portions 12 . Positioning portion 13 on the side.

The bottom plate portion 11 has a rectangular shape and has a top surface 111 having a concave arc shape and a bottom surface 112 opposite to the top surface 111. The top surface 111 has a first side 111a and a second side 111b parallel to the two long side edges of the bottom plate portion 11, and an engaging groove 111c between the side joint portions 12. The top surface 111 extends upwardly from the first side edge 111a to the second side edge 111b. The engaging groove 111c is formed at a position centered on the top surface 111 in a direction parallel to the first side 111a, and is recessed from the top surface 111 toward the bottom surface 112.

The side joint portions 12 project from the top surface 111 of the bottom plate portion 11 at intervals, and each side joint portion 12 has a mounting hole 121 facing the other side joint portion 12. Each of the mounting holes 121 has a pivot hole portion 121a and a sliding hole portion 121b. The pivot hole portion 121a penetrates through the corresponding side joint portion 12. The sliding hole portion 121b is formed by an inner side surface 122 facing the other mounting hole 121, a curved surface 123 connected to a circular arc side of the inner side surface 122, and a vertical side connected to the inner side surface 122. A first stop surface 124 and a second stop surface 125 spaced apart by the pivot hole portion 121a are defined together. Each of the positioning portions 13 has a through hole 131 adapted to be coupled to the first housing 8 through a through hole 131 and a fastener (not shown) for fixing the base 1 to the first housing 8 . .

The pivot shafts 2 are pivotally disposed on the pivot holes 121a of the mounting holes 121 of the side joint portions 12 along a first axis L1 of the side joint portions 12 and spaced apart from the engaging grooves 111c. The rotating shaft 2 is rotatable relative to the equilateral joint portion 12 with the first axis L1 as an axis.

The rotating member 3 is disposed on the rotating shaft 2 and connected to the second housing 9 to rotate the rotating shaft 2 relative to the base 1 to drive the second housing 9 to rotate relative to the first housing 8 or closure. In detail, the rotating member 3 includes a shaft post portion 31, a first pivoting portion 32, a second pivot portion 33, a connecting plate portion 34, and two stopping portions 35. The shaft portion 31 is sleeved on the rotating shaft 2 and interposed between the side joint portions 12 . The first pivoting portion 32 and the second pivoting portion 33 are radially protruded from the same side of the shaft post portion 31 toward the base 1 . The connecting plate portion 34 extends from the side of the shaft portion 31 opposite to the first pivoting portion 32 and the second pivot portion 33 and is connected to the pivoting side 91 of the second housing 9 . The stoppers 35 are axially protruded from opposite ends of the shaft portion 31 and adjacent to the first pivot portion 32 and the second pivot portion 33, respectively. The stopper portions 35 are respectively provided in the sliding hole portions 121b of the attachment holes 121, and are movable in the sliding hole portions 121b with respect to the side joint portions 12. When the connecting plate portion 34 is rotated to a position perpendicular to the bottom plate portion 11 (as shown in FIG. 7B), the blocking portions 35 abut against the first blocking surfaces 124 of the side engaging portions 12, and when The connecting plate portion 34 is rotated to a position parallel to the bottom plate portion 11 (as shown in FIG. 9B ), and the blocking portions 35 abut against the second blocking surfaces 125 of the side engaging portions 12 , thereby restricting the rotation The rotation path limit of piece 3. The detailed action will be detailed in the following paragraphs.

The elastic member 4 is a cross-shaped spring disposed on the base 1 and configured to provide the elastic force of the rotating member 3 so that the rotating member 3 is pivoted in two opposite directions by the elastic force of the elastic member 4. Specifically, the elastic member 4 includes a bottom portion 41 and a first elastic portion 42 and a second portion which are respectively bent from the opposite ends of the bottom portion 41 toward the rotating member 3 and overlap each other. The pressing portion 43. The bottom rod portion 41 is disposed at a bottom end of the engaging groove 111c along a second axis L2 that passes through the engaging groove 111c and is parallel to the first axis L1, and can be in the engaging groove 111c. The two axes L2 are pivoted. The first elastic portion 42 has a first curved portion 421 connected to the bottom portion 41 adjacent to the first pivot portion 32, and a first curved portion 421 extending from the first curved portion 421 and pivoted to the second pivot The first connecting arm segment 422 of the joint 33. The second elastic portion 43 has a second curved portion 431 connected to the bottom portion 41 and adjacent to the second pivot portion 33, and a second curved portion 431 extending from the second curved portion 431 and pivoted to the first pivot The second connecting arm segment 432 of the joint 32. The first connecting arm segment 422 and the second connecting arm segment 432 overlap each other in this embodiment, so that the elastic member 4 can generate a large amount of deformation in a limited space to provide a large elastic force. In a modified embodiment, the first connecting arm segment 422 and the second connecting arm segment 432 are also designed not to overlap, and the first connecting arm segment 422 is pivotally connected to the first pivoting portion. 32. The second connecting arm segment 432 is pivotally connected to the second pivoting portion 33, so that the elastic force required to drive the rotating member 3 can be provided by the elastic deformation of the elastic member 4.

Referring to FIG. 7A, FIG. 8A and FIG. 9A, the rotating member 3 can be opposite to the base 1 with a first axis L1 between a first position as shown in FIG. 7A and a second position as shown in FIG. 9A. Rotating for the axis, and the rotating member 3 pivoting from the first position toward the second position, pivots through a predetermined angle θ to a critical position as shown in FIG. 8A. The predetermined angle θ is 30 degrees in this embodiment, but is not limited thereto.

Referring to FIG. 7B to FIG. 7D , in particular, when the rotating member 3 is in the first position, the first pivoting portion 32 and the second pivoting portion 33 are adjacent to the first side 111 a of the bottom plate portion 11 . The web portion 34 faces the direction perpendicular to and away from the bottom plate portion 11. The bottom portion 41 of the elastic member 4 abuts against the bottom end of the engaging groove 111c, and the first elastic portion 42 and the second elastic portion 43 are pivotally connected to the second pivot portion 32. The portion 33 is slightly pressed to provide a first elastic force F1 to be applied to the first pivoting portion 32 and the second pivoting portion 33. The first pivoting portion 32 and the second pivoting portion 33 are forcefully coupled to the shaft. The column portion 31, the connecting plate portion 34, and the blocking portions 35 abut the blocking portions 35 against the first blocking surfaces 124 of the side engaging portions 12 to restrict the rotation of the rotating member 3. The path limit and the connecting plate portion 34 interlocking the opening and closing side 92 of the second housing 9 (see FIG. 3) abut against the first housing 8. The rotating member 3 is biased between the first position and the critical position according to the biasing direction of the first elastic force F1 of the first pivoting portion 32 and the second pivoting portion 33. Being urged by the elastic member 4 to rotate in the counterclockwise direction in FIG. 8 along the first axis L1, and the stoppers 35 tend to abut against the first stop faces 124, thereby The first housing 8 and the second housing 9 do not need to be separately provided with a locking member or a magnetic member, and even if the second housing 9 is accidentally touched, the rotating member 3 rotates clockwise, and the criticality is not reached. Before the position, the second housing 9 can be driven by the elastic member 4 and the rotating member 3 to return to the closed state, thereby preventing the second housing 9 from being opposite to the first housing due to the accidental contact with the second housing 9. 8 is turned on.

Referring to FIG. 8A to FIG. 8D, when the rotating member 3 is forced to pivot in a first rotation direction R1 (clockwise direction in the figure) toward the critical position, the first pivoting portion 32 and the second pivoting portion 33 pivoting along a pivoting path S1 along the top surface 111 in a direction away from the first side edge 111a, and mechanically interlocking the shaft post portion 31, the connecting plate portion 34, and the stopping portions 35, so that The blocking portions 35 are separated from the first blocking surfaces 124, and the connecting plate portion 34 is linked to the opening and closing side 92 of the second housing 9 (see FIG. 3) to be opened relative to the first housing 8. . The first pivoting portion 32 and the second pivoting portion 33 simultaneously pull the elastic member 4 with the bottom rod portion 41 and the second axis L2 as an axis and rotate along a second rotation opposite to the first rotation direction R1. The direction R2 (counterclockwise in the drawing) is rotated to bring the first biasing portion 42 and the second biasing portion 43 toward the bottom rod portion 41, and the first biasing portion 42 and the second biasing portion 43 are added to The elastic force of the first elastic portion F1 (see FIG. 7C) of the first pivoting portion 32 and the second pivoting portion 33, and the direction of the first elastic force F1 also follows the first pivoting portion 32 and the first The position of the two pivoting portions 33 changes continuously, but is substantially in the direction of the upper right in the drawing. It should be particularly noted that when the rotating member 3 is pivoted from the first position toward the second position by less than the predetermined angle θ and does not reach the critical position, corresponding to the first axis L1 (see FIG. 4), the first The two axes L2 (see FIG. 4), the first pivoting portion 32 and the second pivoting portion 33 are non-coplanar, and the extending direction of the first elastic force F1 passes under the rotating shaft 2, and the rotating member 3 is further A moment is generated which causes the rotating member 3 to pivot back to the first position in the second rotational direction R2. That is, when the second housing 9 is pivoted less than the predetermined angle θ, the second housing 9 produces an effect of automatically closing the first housing 8 as described in the preceding paragraph.

When the rotating member 3 is pivoted by a predetermined angle θ to the critical position, the first pivoting portion 32 and the second pivoting portion 33 face the bottom end of the engaging groove 111c, that is, the bottom of the elastic member 4 The position of the rod portion 41 is such that the first biasing portion 42 and the second biasing portion 43 are closest to the bottom rod portion 41. In the critical position, the first axis L1, the second axis L2, the first pivoting portion 32 and the second pivoting portion 33 are coplanar, the first elastic portion 42 and the second elastic portion The elastic force applied to the first pivoting portion 32 and the second pivoting portion 33 passes through the rotating shaft 2, and the elastic force provided by the elastic member 4 substantially passes through the rotating shaft of the rotating member 3 (ie, the The first axis L1), so the elastic force of the elastic member 4 in this state does not in principle constitute a thrust for driving the rotation of the rotary member 3.

Referring to FIG. 9A to FIG. 9D, and FIG. 10, when the rotating member 3 continues to pivot beyond the predetermined angle θ, the first pivoting portion 32 and the second pivoting portion 33 gradually approach the first surface along the top surface 111. The first elastic portion 42 and the second elastic portion 43 are gradually separated from the bottom portion 41, and the first elastic portion 42 and the second elastic portion 43 generate a second elastic force F2 applied to the first side portion 111b. a pivoting portion 32 and the second pivoting portion 33. The direction of the second elastic force F2 also changes continuously as the position of the first pivoting portion 32 and the second pivoting portion 33 changes, and the extending direction of the second elastic force F2 passes over the rotating shaft 2, and The rotary member 3 generates a moment that constantly pivots the rotary member 3 to the second position in the first rotational direction R1. That is, when the second housing 9 pivots beyond the predetermined angle θ, the second housing 9 produces an effect of automatically opening relative to the first housing 8.

When the rotating member 3 is in the second position, the first pivoting portion 32 and the second pivoting portion 33 are adjacent to the second side edge 111b of the bottom plate portion 11, the connecting plate portion 34 is oriented parallel to the bottom plate portion. 11 directions. The bottom portion 41 of the elastic member 4 abuts against the bottom end of the engaging groove 111c, and the first elastic portion 42 and the second elastic portion 43 are pivotally connected to the second pivot portion 32. The portion 33 is slightly pressed to provide the second elastic force F2 to be applied to the first pivoting portion 32 and the second pivoting portion 33. The first pivoting portion 32 and the second pivoting portion 33 are forcefully coupled to the shaft. The column portion 31, the connecting plate portion 34, and the blocking portions 35 abut the blocking portions 35 against the second blocking surfaces 125 of the side engaging portions 12 to restrict the rotation of the rotating member 3. a path limit, and the connecting plate portion 34 interlocking the opening and closing side 92 of the second housing 9 (see FIG. 3) away from the first housing 8 such that the second housing 9 is opposite to the first housing 8 is turned on.

When the rotating member 3 pivots from the second position toward the first position and does not reach the critical position, corresponding to the first axis L1 (see FIG. 4), the second axis L2 (see FIG. 4), The first pivoting portion 32 and the second pivoting portion 33 are non-coplanar, and the extending direction of the second elastic force F2 passes over the rotating shaft 2, thereby further generating the rotating member 3 so that the rotating member 3 is along The first direction of rotation R1 pivots back to the moment of the second position. In other words, in the present embodiment, when the second housing 9 is forced to pivot less than 60 degrees (90 degrees - predetermined angle θ) in a direction closed to the first housing 8, the second housing 9 The second housing 9 is continuously pushed by the second elastic force F2 to produce an effect of automatically opening relative to the first housing when the second housing 9 is released.

In summary, the pivot device 100 of the present invention directly interlocks the elastic member 4 by the rotating member 3. When the rotating member 3 is rotated to different angles, the elastic member 4 is synchronously pivoted with the rotating member 3. The elastic force applied to the rotating member 3 causes the elastic force to change direction, causing two different directions of moments, and the rotation of the rotating member 3 can be provided by the arrangement of the elastic member 4 without complicated configuration. The larger cam mechanism can also achieve the effect of automatically opening and closing the second housing 9, so that the purpose of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

100‧‧‧ pivot device  1‧‧‧Base  11‧‧‧Bottom plate  111‧‧‧ top surface  111a‧‧‧ first side  111b‧‧‧Second side  111c‧‧‧ snap groove  112‧‧‧ bottom  12‧‧‧ Side joints  121‧‧‧Mounting holes  121a‧‧‧ pivot hole  121b‧‧‧Sliding hole  122‧‧‧ inside side  123‧‧‧ curved surface  124‧‧‧First stop surface  125‧‧‧second stop surface  13‧‧‧ Positioning Department  131‧‧‧Perforation  2‧‧‧ shaft  3‧‧‧Rotating parts  31‧‧‧ shaft column  32‧‧‧First pivotal  33‧‧‧Second pivotal  34‧‧‧Connecting Department  35‧‧‧stops  4‧‧‧Flexible parts  41‧‧‧Bottom part  42‧‧‧First compression department  421‧‧‧First curved section  422‧‧‧First connecting arm section  43‧‧‧Second elastic section  431‧‧‧second curved section  432‧‧‧second connecting arm section  8‧‧‧ first housing  81‧‧‧ accommodating space  9‧‧‧ second housing  91‧‧‧ pivot side  92‧‧‧ Opening and closing side  L1‧‧‧first axis  L2‧‧‧second axis  F1‧‧‧First stretch  F2‧‧‧Second stretch  R1‧‧‧first direction of rotation  R2‧‧‧second direction of rotation  S1‧‧‧ pivot path  Θ‧‧‧predetermined angle

Other features and effects of the present invention will be apparent from the following description of the drawings, in which:  Figure 1 is a perspective view of an embodiment of the novel pivot device;  Figure 2 is a schematic view showing the embodiment connected to a first housing and a second housing;  3 is a side view showing the second housing having a pivoting side and an opening and closing side;  Figure 4 is an exploded perspective view of the embodiment;  Figure 5 is another perspective view of Figure 4;  Figure 6 is a front elevational view of the embodiment;  Figure 7A is a side view of the embodiment, illustrating a rotating member of the embodiment in a first position;  Figure 7B is a cross-sectional view taken along line 7B-7B of Figure 5;  Figure 7C is a cross-sectional view taken along line 7C-7C of Figure 5;  Figure 7D is a cross-sectional view taken along line 7D-7D of Figure 5;  Figure 8A is a side view of the embodiment, illustrating the rotating member pivoted a predetermined angle to a critical position;  Figure 8B is a cross-sectional view showing the rotating member of Figure 7B pivoted to the critical position;  Figure 8C is a cross-sectional view of the rotating member of Figure 7C pivoted to the critical position;  Figure 8D is a cross-sectional view of the rotating member of Figure 7D pivoted to the critical position;  Figure 9A is a side view of the embodiment, illustrating the rotating member in a second position;  Figure 9B is a cross-sectional view of the rotating member of Figure 8B pivoted to the second position;  Figure 9C is a cross-sectional view of the rotating member of Figure 8C pivoted to the second position;  Figure 9D is a cross-sectional view of the rotating member of Figure 8D pivoted to the second position; and  Figure 10 is a schematic view showing the first housing being opened opposite the second housing when the rotating member is in the second position.  

Claims (11)

A pivot device is adapted for use with a first housing and a second housing, the pivot device comprising:  a base adapted to be disposed in the first housing and including a bottom plate portion and two side joint portions projecting from a top surface of the bottom plate portion at intervals, the top mask having a side surface Engagement slots between the joints;  a shaft pivoted along the first axis of the side joints to the side joints;  a rotating member adapted to be coupled to the second housing, and comprising a set of shaft portions disposed on the rotating shaft, and a first pivot radially protruding from the same side of the shaft portion toward the base a joint and a second pivot joint; and  An elastic member includes a bottom rod portion rotatably disposed on the engaging groove along a second axis parallel to the first axis through the engaging groove, and opposite ends of the bottom rod portion respectively a first elastic portion extending in a direction of the rotating member and a second elastic portion, the first elastic portion is elastically deformably pivotally connected to the second pivoting portion of the rotating member, and the second elastic portion is elastic Deformably pivotally connected to the first pivoting portion of the rotating portion;  The first elastic portion and the second elastic portion can push the rotating member when the first axis, the second axis, the first pivoting portion and the second pivoting portion are non-coplanar The first axis of the shaft is pivoted to rotate the second housing relative to the first housing.   The pivoting device of claim 1, wherein the first elastic portion has a first curved portion connected to the bottom portion adjacent to the first pivot portion, and one extending from the first curved portion And a second connecting arm segment pivotally connected to the second pivoting portion, the second elastic portion has a second curved portion connected to the bottom rod portion adjacent to the second pivot portion, and a second bending portion The two bending segments extend and are pivotally connected to the second connecting arm segment of the first pivoting portion, and the first connecting arm segment and the second connecting arm segment overlap each other. The pivot device of claim 1, wherein the bottom plate portion further has a bottom surface, the engaging groove is inclined and concave toward the bottom surface, and the bottom rod portion of the elastic member is driven by the rotating member. Rotatingly abuts the bottom end of the engaging groove. The pivoting device of claim 1, wherein the base further comprises two positioning portions respectively connected to the outer sides of the side engaging portions, each positioning portion being adapted to be coupled to a fastener for fixing to the first case. The pivot device of claim 1, wherein the top surface of the bottom plate portion further has a first side, and the rotating member is pivotable relative to the base between a first position and a second position When the rotating member is in the first position, the first pivoting portion and the second pivoting portion are adjacent to the first side of the bottom plate portion, and when the rotating member is in the second position, the first pivot The connecting portion and the second pivoting portion are away from the first side of the bottom plate portion, and when the rotating member is pivoted from the first position toward the second position by less than a predetermined angle, the elastic member is pressed to provide a a first elastic force is applied to the first pivoting portion and the second pivoting portion, the first elastic force pivoting the rotating member to the first position, and when the rotating member pivots beyond the predetermined angle, the elastic member Pressing to provide a second elastic force to the first pivoting portion and the second pivoting portion, the second elastic force pivoting the rotating member to the second position. The pivoting device of claim 5, wherein each side engaging portion has a mounting hole facing the other side engaging portion, the mounting hole having a pivot hole portion and a sliding hole portion, the two ends of the rotating shaft respectively The pivoting holes are pivotally disposed on the mounting holes of the side engaging portions, and each of the side engaging portions further has a first stopping surface and a second stopping surface, and the rotating member further has two separate forming portions a blocking portion at opposite ends of the shaft portion, wherein the blocking portions are rotatably disposed at the sliding hole portions of the mounting holes, and when the rotating member is in the first position, each blocking portion is abutted The first blocking surface is connected to each side joint portion, and when the rotating member is in the second position, each of the stopping portions abuts against the second stopping surface of each side joint portion. The pivot device of claim 5, wherein the top surface of the bottom plate portion further has a second side opposite to the first side, the top surface extending upward from the first side edge in an arc. Up to the second side, the first pivoting portion and the second pivoting portion pivot along the pivoting path along the top surface, and when the rotating member is in the first position, the first pivoting portion The first pivoting portion is adjacent to the first side of the top surface, and when the rotating member is in the second position, the first pivoting portion and the second pivoting portion are adjacent to the second portion of the top surface Side. The pivot device of claim 5, wherein the rotating member is pivoted from the first position to the second position in a first rotational direction, and the elastic member is pivoted along the bottom portion Conversely, the second direction of rotation of the first direction of rotation is rotated. The pivot device of claim 5, wherein the first axis, the second axis, the first pivoting portion, and the second pivoting portion are common when the rotating member is pivoted to the predetermined angle The elastic member is applied to the rotating shaft of the first pivoting portion and the second pivoting portion through the rotating shaft. The pivoting device of claim 5, the second housing has a pivoting side and an opening and closing side at opposite positions, the bottom plate portion of the base is disposed on the first housing, and the rotating member is further a connecting plate portion extending from a side of the shaft post opposite to the first pivot portion and the second pivot portion and adapted to connect to the pivoting side of the second housing, and The rotating member is in the first position, the opening and closing side of the second housing is adjacent to the first housing, and when the rotating member is in the second position, the opening and closing side of the second housing is away from the first a housing. The pivot device of claim 5, wherein the predetermined angle is 30 degrees.