TWI432001B - Hinge structure and portable electronic device using the same - Google Patents

Description

Hinge mechanism and portable electronic device using the same

The invention relates to a hinge mechanism and a portable electronic device using the hinge mechanism, in particular to a hinge mechanism with an automatic opening function and a portable electronic device using the hinge mechanism.

With the rapid development of wireless communication technology and information processing technology, portable electronic devices such as mobile phones and PDAs (Personal Digital Assistants) enable consumers to enjoy the convenience brought by high-tech anytime and anywhere, among them, folding electronic The device is popular among consumers because of its exquisite structure.

The folding electronic device usually connects the body and the cover body by a hinge mechanism. The conventional hinge mechanism generally includes a main shaft, a cam, a follower and a spring. The spring is sleeved on the main shaft, and one of the cam and the follower is in direct contact with the spring, and the cam and the follower are under the elastic force of the spring. Always stay in touch and match. This type of hinge mechanism realizes the opening and closing of the cover body relative to the body by overcoming the cam surface of the cam and the cam surface of the follower against the elastic force of the spring.

However, when the above-mentioned hinge mechanism is used, the user usually needs to cooperate with both hands to open the cover body, so that the user cannot perform one-hand operation when answering or making a call, and the use is inconvenient.

In view of this, it is necessary to provide a hinge mechanism having an automatic opening function.

It is also necessary to provide a portable electronic device to which the hinge mechanism is applied.

A hinge mechanism includes a fastening component, an actuating elastic component, a spindle, an active cam, a follower, a reset elastic component, a control component and a fixing base. The spindle comprises a threaded portion and a clamping end. And a stopping end, the holding end and the stopping end are respectively located at two ends of the main shaft, the fixing component is fastened on the holding end, the active cam comprises a cam wall, a spiral engaging portion and a through hole The engaging portion is rotatably engaged with the threaded portion, and the tooth thickness of the engaging portion is smaller than the pitch of the threaded portion. The follower includes a cam sidewall, a side hole and a rotation stop portion, and the control member includes a The control portion and the continuous perforation, the control portion slidably cooperates with the rotation preventing portion, the fixing seat includes an inner wall and a stop hole, and the inner wall is provided with a stopper, the fixing seat is provided by the stop hole Fixed on the stop end, the main shaft passes through and is received in the through hole of the active cam, the side hole of the follower, the through hole of the control member and the stop hole of the fixing seat, and the actuating The elastic member provides power to push the cam sidewall rotatably Wheel wall with the control member rotatably relative to the holder to unlock the stopper, the return elastic member provides a restoring force, the push control member relative to the holder of the locking stopper.

A portable electronic device includes a body, a cover body and a hinge mechanism. The hinge mechanism rotatably connects the cover body and the body. The hinge mechanism includes a fastening component, an actuating elastic component, a spindle, and an active mechanism. a cam, a follower, a reset elastic member, a control member and a fixing base, the spindle includes a threaded portion, a holding end and a stopping end, wherein the holding end and the stopping end are respectively located at the main shaft At both ends, the clamping component is fastened to the clamping end, and the driving cam comprises a cam wall and a spiral engaging portion And a through hole, the engaging portion is rotatably engaged with the threaded portion, and a tooth thickness of the engaging portion is smaller than a pitch of the threaded portion, the follower includes a cam side wall, a side hole and a rotation stop portion, the control The device includes a control portion and a continuous perforation. The control portion slidably cooperates with the rotation preventing portion. The fixing base includes an inner wall and a stop hole, and the inner wall is provided with a stopper. The stop hole is fixed on the stop end, and the main shaft passes through and is received in the through hole of the active cam, the side hole of the follower, the through hole of the control member and the stop hole of the fixed seat The actuating elastic member provides power for urging the cam side wall to rotatably cooperate with the cam wall, the control member is rotatably unlocked relative to the stop of the fixed seat, and the return elastic member provides a restoring force to push the top The control member is locked relative to the stop of the mount.

Compared with the prior art, the hinge mechanism and the portable electronic device using the hinge mechanism unlock the control member and the fixing seat by pushing the top control member, thereby actuating the active cam relative to the main shaft under the action of the actuating elastic member. When the follower rotates, it further drives the cover body to open relative to the body, and the cover body can be automatically opened by one-hand operation.

100‧‧‧ wafer card holder

10‧‧‧ Ontology

11‧‧‧Accommodation chamber

12‧‧‧ bottom wall

13‧‧‧First side wall

14,16‧‧ openings

15‧‧‧second side wall

17‧‧‧Card wall

18‧‧‧Axis hole

30‧‧‧ cover

31‧‧‧ top wall

311‧‧‧ outer surface

312‧‧‧ inner surface

313‧‧‧ ribs

315‧‧‧Hinged end

317‧‧‧ buckle end

33‧‧‧Clamping wall

332‧‧‧ mounting holes

35‧‧‧Flexible Department

351‧‧‧Free end

37‧‧‧Deduction Department

371‧‧‧Connecting wall

373‧‧‧ buckle wall

375‧‧‧ Pressing Department

50‧‧‧ shaft

80‧‧‧wafer card

1 is a perspective view of a preferred embodiment of the hinge mechanism of the present invention; FIG. 2 is a perspective view of a preferred embodiment of the hinge mechanism of the present invention; FIG. 3 is a perspective view of a preferred embodiment of the hinge mechanism of the present invention. 3 is a perspective view of a follower of a preferred embodiment of the hinge mechanism of the present invention; FIG. 5 is a perspective view of a fixed seat of the preferred embodiment of the hinge mechanism of the present invention; FIG. 6 is a hinge mechanism of the present invention; Assembly diagram of a preferred embodiment; Figure 7 is an assembled view of a preferred embodiment of the hinge mechanism of the present invention; Figure 8 is a partially assembled view of a preferred embodiment of the hinge mechanism of the present invention; and Figure 9 is a cross-sectional view taken along line IX-IX of Figure 7.

The hinge mechanism of the present invention is suitable for a folding or flip type portable electronic device (not shown) having a body and a cover.

Referring to FIG. 1 and FIG. 2, the hinge mechanism includes a fastening component 10, a sleeve 11, an actuating elastic member 12, a main shaft 13, an active cam 14, a follower 15, and a return elasticity. A member 16, a control member 17, a fixing base 18, a fastening ring 19 and a pressing member 20.

The fixing component 10 includes a circular snap ring 101 having a certain thickness, a circular friction reducing body 102 and a circular gasket 103. A substantially square locking hole 1012 is defined in the middle of the snap ring 101. A circular matching hole 1022, 1032 having a shape and a size is respectively formed in the middle of the friction reducing body 102 and the spacer 103.

The sleeve 11 is generally a hollow octagonal body comprising an octagonal outer wall 112 and an octagonal inner wall 114. One end of the sleeve 11 is open, and the other end is semi-closed, and a retaining hole 116 is defined in a middle portion of the semi-closed end.

In this embodiment, the actuating elastic member 12 is a columnar spring, which may also be other elastic bodies such as an elastic sponge or the like.

The main shaft 13 has a substantially elongated cylindrical shape, and includes a small shaft portion 131, a threaded portion 132, and a large shaft portion 133. The outer diameter of the small shaft portion 131 and the sleeve 11 are respectively The inner diameter of the retaining hole 116 and the inner diameter of the friction reducing body 102 and the mating holes 1022, 1032 of the spacer 103 are equivalent. The small shaft portion 131 has a catching end 135 having a shape and a size substantially equivalent to the latching holes 1012 of the snap ring 101. The threaded portion 132 extends axially from one end of the small shaft portion 131 with respect to the holding end 135, and has an outer diameter smaller than the inner diameter of the actuating elastic member 12. One end of the large shaft portion 133 abuts the threaded portion 132, and the other end is symmetrically opened with a stepped stop portion 137. The stop portion 137 defines an annular card slot 138 in the radial direction.

Referring to FIG. 3 together, the driving cam 14 includes an octagonal outer wall 141, a cam wall 143, a spiral engaging portion 144, and a circular through hole 146. The outer wall 141 is sized to correspond to the inner wall 114 of the sleeve 11, respectively. The cam wall 143 includes two axially symmetrically disposed peaks 1431, a horizontal wall 1432, and a valley 1433. The convex peaks 1431 and the valleys 1433 and the horizontal walls 1432 are respectively connected by a smooth inclined wall 1434. The peak 1431 and the adjacent valleys 1433 are respectively connected by a smooth vertical wall 1435. The engaging portion 144 is disposed on an inner wall of the driving cam 14 for rotatably engaging the threaded portion 132 of the main shaft 13. The tooth thickness of the engaging portion 144 is smaller than the pitch of the thread portion 132. The through hole 146 extends axially through the driving cam 14 and has an inner diameter larger than the outer diameter of the threaded portion 132.

Referring to FIG. 4 together, the follower 15 includes a circular outer peripheral wall 151, a cam sidewall 153 and a side hole 154. The cam sidewall 153 is disposed on one side of the follower 15 and includes two axially symmetric peaks 1531 and a valley 1533. The peaks 1531 and the valleys 1533 are connected by a smooth inclined wall 1534. The side hole 154 extends axially through the follower 15 and has an inner diameter larger than the outer diameter of the threaded portion 132 of the main shaft 13. Two arcuate grooves 156 are symmetrically opened on the outer peripheral wall 151 in the axial direction. The two grooves 156 phase A stepped rotation preventing arm 158 is formed on the peripheral wall 151 adjacent to each other in a direction away from the cam side wall 153.

The return elastic member 16 is a columnar spring in this embodiment, and has an inner diameter larger than the outer diameter of the threaded portion 132 of the main shaft 13. The return elastic member 16 can also be other elastic bodies such as elastic sponges and the like.

The control member 17 is substantially a hollow cylindrical body including a circular end portion 172, two curved control portions 174 and a consistent through hole 176. The two control portions 174 are respectively symmetrically extended from the end portion 172 in the axial direction. The two control portions 174 enclose two arc-shaped rotation preventing grooves 178 corresponding to the two rotation preventing arms 158 of the follower 15 respectively. The inner diameter of the through hole 176 is substantially equal to the outer diameter of the large shaft portion 133 of the main shaft 13.

Referring to FIG. 5 together, the fixing base 18 is substantially a hollow cylindrical body, and one end is open and the other end is semi-closed. The fixing base 18 includes a circular inner wall 181, a circular flange 182 and four axially symmetrically fixed fixing portions 183. The inner wall 181 is provided with two arc-shaped stoppers 184 corresponding to the two rotation preventing grooves 178 of the control member 17, respectively. The flange 182 protrudes from one end of the fixing seat 18 at a semi-closed end. A pair of "U" shaped insertion holes 185 are axially symmetrically formed on the flange 182 and the semi-closed end of the fixing seat 18. A deformation block 186 is protruded from the middle of the flange 182. The block 186 is located between the two insertion holes 185. A stopper hole 187 penetrating the fixing seat 18 is defined in the middle of the block 186 in the axial direction. The stop hole 187 has a size corresponding to the stop portion 137 of the main shaft 13.

The fastening ring 19 is substantially a deformed ring body having a certain elasticity. The buckle ring 19 pack Two curved portions 192 are included. A deformation locking hole 194 is formed in the middle of the fastening ring 19 . The aperture of the locking hole 194 corresponds to the outer diameter of the large shaft portion 133 of the main shaft 13 corresponding to the slot 138 of the main shaft 13.

The pressing member 20 includes a circular pressing portion 202 and two pressing arms 204. The two pressing arms 204 are substantially arc-shaped, and each of them is symmetrically extended axially from both sides of the pressing portion 202. The two pressing arms 204 have a certain elasticity. The inner wall of the two pressing arms 204 is respectively provided with an arcuate recess 206 corresponding to the curved portion 192 of the fastening ring 19 .

When the hinge mechanism is assembled, please refer to FIG. 6 to FIG. 9 at the same time, firstly, the driving cam 14 is inserted from one end of the main shaft 13 with the holding end 135, that is, the main shaft 13 passes through the through hole 146 of the driving cam 14. The cam wall 143 of the driving cam 14 is moved away from the catching end 135, and the driving cam 14 is moved until the engaging portion 144 of the driving cam 14 is fully engaged with the threaded portion 132 of the main shaft 13.

Thereafter, the follower 15 is nested by the other end of the main shaft 13 with respect to the holding end 135, that is, the main shaft 13 passes through the side hole 154 of the follower 15, and the cam side wall 153 of the follower 15 faces the cam wall 143 to abut each other. Pick up.

Then, the return elastic member 16 is mounted together with the control member 17 on one side of the follower 15 opposite to the cam side wall 153, that is, the return elastic member 16 is placed between the two rotation preventing arms 158 of the follower 15, and then The two control portions 174 of the control member 17 are respectively inserted along the two recesses 156 of the follower 15 such that the return elastic member 16 is pressed, one end of which abuts against the follower 15 and the other end abuts against the control member. The end portion 172 of the 17 is such that the two anti-rotation arms 158 of the follower 15 are respectively received in the two rotation preventing grooves 178 of the control member 17.

After the stop hole 187 of the fixing seat 18 is aligned with the stop portion 137 of the main shaft 13, the solid portion is fixed. The fixing seat 18 is inserted into the main shaft 13 so that the stopping portion 137 is received in the stopping hole 187, and the two stoppers 184 of the fixing seat 18 are respectively received in the two rotation preventing grooves 178, and then the fixing ring 19 is assembled. The fixing hole 194 passes through the stopping portion 137 of the main shaft 13, and the fixing ring 19 is inserted into the slot 138 by the large shaft portion 133 of the main shaft 13 and rotated by 90 degrees, and the fixing ring 19 is engaged in the slot of the main shaft 13. 138, and one end of the fastening ring 19 abuts against the flange 182, the block 186 of the fixing seat 18 is fastened in the fastening hole 194 of the fastening ring 19, and the two curved portions 192 of the fastening ring 19 They are respectively covered above the two insertion holes 185 of the fixing base 18. Then, the two pressing arms 204 of the pressing member 20 are opened, and then inserted into and received by the insertion holes 185 respectively. After being loosened, the curved portion 192 of the fastening ring 19 is received by the pressing member 20. Inside the recess 206.

Then, the actuating elastic member 12 is nested by the retaining end 135 and located above the small shaft portion 131 of the main shaft 13, and then the main shaft 13 is pushed into the sleeve 11 together with the components mounted thereon, and the active cam 14 is The outer wall 141 is axially slid relative to the inner wall 114 of the sleeve 11 until the retaining end 135 is exposed through the retaining hole 116 of the sleeve 11, so that the actuating elastic member 12 is pressed, and one end is supported by the sleeve 11 One end of the hole 116 and the other end abutting against the active cam 14 is provided with one end of the through hole 146. At this time, the fixing seat 18 and the pressing member 20 are located outside the sleeve 11, and then the spacer 103, the friction reducing body 102 and The snap ring 101 is inserted into the latching end 135 and abuts against each other, that is, the latching end 135 is respectively received in the mating holes 1032 and 1022 of the spacer 103 and the friction reducing body 102, and is clamped to the retaining ring 101. In the hole 1012, at this time, under the action of the actuating elastic member 12, the peak 1431 of the driving cam 14 abuts against the valley 1533 of the follower 15.

Finally, the hinge mechanism is adjusted. In the embodiment of the present invention, the sleeve 11 is fixed, and the fixed seat 18 is relatively rotated. Holding the sleeve 11 to hold the active cam 14 and rotating and fixing The seat 18 is rotated by the stopper 184 and the control member 17 and the rotation preventing arm 158 of the follower 15 and the rotation preventing groove 178 of the control member 17 to drive the control member 17 and the follower 15 to rotate together with the driving cam 14. Until the convex peak 1431 of the cam wall 143 of the driving cam 14 abuts against the inclined wall 1534 of the cam side wall 153 of the follower 15, while compressing the actuating elastic member 12, the side portions of the engaging portion 144 of the driving cam 14 are closely abutted. The end portion 172 of the control member 17 is closely abutted against the bottom end of the fixing seat 18, and the control portion 174 of the control member 17 is partially accommodated by the side of the threaded portion 132 of the main shaft 13. The assembly is completed in the recess 156 of the follower 15. At this time, the state of the hinge mechanism corresponds to a state in which the cover of the portable electronic device is closed relative to the body.

When the hinge mechanism is used, it is installed in the portable electronic device, such as a mobile phone. The body of the portable electronic device is fixed to the fixing portion 183 of the fixing base 18 of the hinge mechanism, and the cover of the portable electronic device is fixed to the outer wall 112 of the sleeve 11 of the hinge mechanism.

When the cover body is closed relative to the body, when the cover body is to be opened, the pressing member 20 is pressed, and since the bottom end of the pressing arm 204 abuts against the end portion 172 of the top control member 17, the push control member 17 is opposite to the fixed seat 18 and the follower 15 The axial sliding state, at the same time, the elastic member 16 is pressed and contracted; the pressing member 20 continues to slide the sliding control member 17 to slide the stopper 184 of the fixing seat 18 out of the rotation preventing groove 178 of the control member 17, and at this time, the control member 17 and The follower 15 is rotatable relative to the main shaft 13; the pressing member 20 is released, and the elastic member 12 is released in a pressurized state while releasing the elastic force, and the engaging portion 144 of the driving cam 14 is relatively slid along the threaded portion 132 of the main shaft 13, at this time, The driving cam 14 moves axially along the side of the main shaft 13 and rotates in the radial direction, and the convex peak 1431 of the driving cam 14 pushes against the inclined wall 1534 of the follower 15, and the ejector follower 15 rotates together with the control member 17; Since the follower 15 is controlled by the control unit 17 174 is resisted, and the end portion 172 of the control member 17 abuts against one end of the stopper 184 of the fixing seat 18, so that the control member 17 can only rotate, so that the follower 15 can only rotate, and the convex peak of the active cam 14 1431 slides along the cam side wall 153 of the follower 15 until the peak 1431 slides to the valley 1533 of the follower 15. At this time, the control member 17 is rotated 180 degrees together with the driving cam 14, and the pressing elastic member 16 is pressed all the time. The pressure is released and the control portion 174 of the control member 17 is re-slid into the fixing seat 18, that is, the stopper 184 of the fixing seat 18 is slid into the rotation preventing groove 178 of the control member 17, and the cover is fully opened.

When the cover body needs to be closed, the cover body is manually flipped, and then the sleeve 11 and the active cam 14 are rotated, because the stop block 184 of the fixed seat 18 and the stop arm 158 of the follower 15 are respectively accommodated in the control member 17 In the groove 178, the follower 15 and the control member 17 are stopped. At this time, since the tooth thickness of the engaging portion 144 of the driving cam 14 is smaller than the pitch of the thread portion 132 of the main shaft 13, the engaging portion 144 is located away from the thread portion 132. Between adjacent threaded portions 132, at this time, the peak 1431 of the driving cam 14 is disengaged from the valley 1533 of the follower 15; the cover is continuously flipped, and the engaging portion 144 re-engages with the threaded portion 132 and slides along the threaded portion 132. The cam wall 143 of the driving cam 14 slides relative to the cam side wall 153 of the follower 15, and the actuating elastic member 12 is compressed and contracted. When the peak 1531 of the follower 15 abuts against the horizontal wall 1432 of the driving cam 14, the cover is released. The cover body can be stably stayed at the position; the cover body is continuously turned over until the convex peak 1431 of the driving cam 14 passes over the convex peak 1531 of the follower 15 and stays on the inclined wall 1534 of the follower 15 at this time, Release the cover body, under the action of the actuating elastic member 12, the engaging portion 144 is tightly engaged with the screw Portion 132, i.e. the lid is in the closed steady state.

It can be understood that the friction reducing body 102 in the embodiment of the present invention can be omitted.

It can be understood that the holding end 135 in the embodiment of the present invention can adopt other structures and be stuck. The component 10 has a corresponding structure and cooperates with it as long as it can be engaged with the holding end 135.

It can be understood that the sleeve 11 in the embodiment of the present invention can be omitted, and the actuating elastic member 12 is originally abutting against one end of the end portion of the sleeve 11 having the holding hole 116 to abut against one side of the fastening component 10, and actively The outer wall 141 of the cam 14 directly engages the cover.

It can be understood that the large shaft portion 133 of the main shaft 13 in the embodiment of the present invention may have the same size as the small shaft portion 131.

It can be understood that the stopping portion 137 and the latching groove 138 of the main shaft 13 in the embodiment of the present invention may have other structures, that is, the main shaft 13 has a stop end of another form, and the fixing seat 18 and the fixing ring 19 have corresponding structures. In cooperation with this, as long as the fixing seat 18 can be stopped by the stopper portion 137, the fixing ring 19 can be engaged with the main shaft 13.

It can be understood that the horizontal wall 1432 and the vertical wall 1435 of the cam wall 143 of the active cam 14 in the embodiment of the present invention may be inclined walls.

It can be understood that the groove 156 and the anti-rotation arm 158 of the follower 15 in the embodiment of the present invention can adopt other structures, that is, the follower 15 has a rotation stop portion, and the control member 17 has a corresponding structure and cooperates with it. It can be realized that the control member 17 can only slide relative to the follower 15 and cannot rotate.

It can be understood that the stopper 184 of the fixing base 18 in the embodiment of the present invention can adopt other structures, and the control member 17 has a corresponding structure and cooperates with each other, as long as the control member 17 and the fixing base 18 can realize the functions of locking and unlocking.

It can be understood that the pressing member 20 in the embodiment of the present invention can be omitted, and can be used when used. Other ways to push the top control, such as a smaller cone.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in accordance with the spirit of the present invention are It should be covered by the following patent application.

10‧‧‧Clock components

101‧‧‧round snap ring

1012‧‧‧ card holder

102‧‧‧Abrasion body

1022, 1032‧‧‧ matching holes

103‧‧‧shims

11‧‧‧Sleeve

112‧‧‧ outer wall

116‧‧‧ card holder

12‧‧‧Activity elastic parts

13‧‧‧ Spindle

131‧‧‧Small shaft

132‧‧‧Threading Department

133‧‧‧ Large shaft

135‧‧‧ card holder

137‧‧‧stop

138‧‧‧ card slot

14‧‧‧Active cam

141‧‧‧ outer wall

143‧‧‧Cam wall

144‧‧‧Meshing Department

146‧‧‧through hole

15‧‧‧ Followers

151‧‧‧ peripheral wall

153‧‧‧Cam side wall

154‧‧‧ side hole

156‧‧‧ Groove

158‧‧‧ rotation arm

16‧‧‧Reset elastic parts

17‧‧‧Controls

172‧‧‧ end

174‧‧‧Control Department

176‧‧‧through holes

178‧‧‧Turning groove

18‧‧‧ Fixed seat

181‧‧‧ inner wall

183‧‧‧ Fixed Department

184‧‧ ‧block

185‧‧‧ insertion hole

19‧‧‧Kelgu ring

192‧‧‧Arc Department

194‧‧‧Cargukong

20‧‧‧Pressing parts

202‧‧‧ Pressing Department

204‧‧‧ Pressing arm

206‧‧‧ recess

Claims (14)

A hinge mechanism includes: a clamping component; an actuating elastic component; a spindle, the spindle includes a threaded portion, a latching end and a stop end, the latching end and the stopping end are respectively located at the main shaft An active cam, the active cam includes a cam wall, a spiral engaging portion and a through hole, the engaging portion is rotatably engaged with the threaded portion, and the tooth thickness of the engaging portion is smaller than the pitch of the thread portion; The follower includes a cam side wall, a side hole and a rotation stop portion; a reset elastic member; a control member, the control member includes a control portion and a consistent through hole; and a fixing seat, the fixing seat An inner wall and a stop hole are provided, and the inner wall is provided with a stopper; the fastening component is fastened to the holding end, and the fixing seat is fixed to the stop end by the stopping hole, The control portion is slidably engaged with the rotation preventing portion, and the main shaft passes through and receives the through hole of the active cam, the side hole of the follower, the through hole of the control member, and the stop hole of the fixing seat The actuating elastic member provides power for pushing the side wall of the cam to be turned Wall engages with the cam, the control member with respect to the fixed base rotatably unlocking the stopper, the return elastic member provides a restoring force, the push control member relative to the holder of the locking stopper. The hinge mechanism of claim 1, wherein the hinge mechanism is further The step includes a sleeve, the sleeve including an inner wall, the active cam including an outer wall slidably mating with the inner wall, the sleeve being open at one end and the other end being semi-closed, and the one end of the semi-closed end corresponds The retaining end of the main shaft has a retaining hole, and the other end of the actuating elastic member abuts one end of the semi-closed end of the sleeve. The hinge mechanism of claim 1, wherein the hinge mechanism further comprises a fastening ring, the fastening ring comprises two curved portions and a through hole, the fastening ring is fastened The stop end of the spindle. The hinge mechanism of claim 3, wherein the spindle further comprises a small shaft portion and a large shaft portion, the thread portion extending from the one end of the clamping end, the large shaft One end of the portion abuts the threaded portion, and the stop end extends from the other end of the large shaft portion. The hinge mechanism of claim 4, wherein the stop portion is stepped, and the stop portion defines an annular card slot, and the retaining ring is locked in the card slot. The hinge mechanism of claim 5, wherein the fixing seat has one end open and one end is semi-closed, and further includes a flange and an insertion hole protruding from one end of the fixing seat. The insertion hole is defined in the flange and the semi-closed end of the fixing seat, and the fixing seat is fastened to the stopping portion of the main shaft by the stopping hole. The hinge mechanism of claim 6, wherein the hinge mechanism further comprises a pressing member, the pressing member comprises a pressing portion and a pressing arm, and the pressing arm extends from the pressing portion, and the pressing arm is inside The arc portion of the wall corresponding to the fastening ring is provided with a recess, and the pressing arm is received in the insertion hole of the fixing seat to abut the control member. The hinge mechanism of claim 1, wherein the actuating elastic member and the return elastic member are cylindrical springs, and one end of the actuating elastic member abuts against the active cam, and one end of the return elastic member Reach on the control. The hinge mechanism of claim 1, wherein the cam wall of the active cam comprises two axially symmetrically arranged peaks, horizontal walls and valleys, the peaks and the valleys and the horizontal walls respectively Connected by a slanted wall, the peak and the adjacent valley are respectively connected by a vertical wall, and the active cam further includes an inner wall, and the engaging portion is disposed on the inner wall. The hinge mechanism of claim 1, wherein the follower further includes an outer peripheral wall, and the rotation preventing portion of the follower is disposed on the outer peripheral wall, and includes a groove and a rotation arm The groove is axially opened by the outer peripheral wall, and the rotation arm extends from the outer peripheral wall away from the follower. The cam side wall is disposed on one side of the follower, and includes two shafts To the symmetrical peaks and valleys, the peaks and valleys are connected by a slanted wall. The hinge mechanism of claim 10, wherein the control member further comprises an end portion, the control portion is axially extended from the end portion, and the control portion is surrounded by a stop arm of the follower member A stop groove, the stopper of the fixing seat is locked in the rotation stop groove. The hinge mechanism of claim 1, wherein the fastening component comprises a snap ring and a gasket, the snap ring has a latching hole corresponding to the latching end of the spindle, and the gasket has a fit a hole through which the main shaft and the fitting hole are fitted to the main shaft. The hinge mechanism of claim 12, wherein the fastening component further comprises an anti-friction body, the anti-friction body is provided with a matching hole, which cooperates with the main shaft to assemble the anti-friction body on the main shaft. A portable electronic device comprising: a body; a cover body; and a hinge mechanism rotatably connecting the cover body and the body, comprising a fastening component, an actuating elastic member, a spindle, an active cam, a follower, and a returning elasticity And a control part and a fixing base, the main shaft includes a threaded portion, a holding end and a stopping end, wherein the holding end and the stopping end are respectively located at two ends of the main shaft, and the fixing component is fastened The driving cam includes a cam wall, a spiral engaging portion and a through hole, the engaging portion is rotatably engaged with the threaded portion, and the tooth thickness of the engaging portion is smaller than the pitch of the thread portion. The movable member includes a cam side wall, a side hole and a rotation stop portion. The control member includes a control portion and a continuous through hole. The control portion slidably cooperates with the rotation preventing portion. The fixing seat includes an inner wall and a stop. a retaining hole is fixed on the inner wall, and the fixing seat is fixed to the stopping end by the stopping hole, and the main shaft passes through and is received in the through hole of the driving cam, the follower a side hole, a through hole of the control member, and a stop hole of the fixing seat, The actuating elastic member provides power for urging the cam side wall to rotatably cooperate with the cam wall, the control member is rotatably unlocked relative to the stop of the fixed seat, the return elastic member provides a restoring force, and the control member is pushed up Locked relative to the stop of the mount.