TWI838091B - Hinge assembly and casing assembly for electronic device - Google Patents

Abstract

A hinge assembly includes a fixed frame, a shaft, a rotatable frame and a cover. The shaft is rotatably disposed on the fixed frame. The rotatable frame is fixed to the shaft. The rotatable frame has a first positioning structure. The cover is at least partially located between the rotatable frame and the fixed frame, and the cover is sleeved on the shaft. The fixed frame or the cover has at least one second positioning structure. The first positioning structure and the at least one second positioning structure are cooperated with each other so as to limit a rotatable range of the rotatable frame.

Description

Hinge assemblies and housing assemblies for electronic devices

The present invention relates to a hinge assembly and a housing assembly of an electronic device comprising the hinge assembly.

With the advancement and development of technology, the screen of a current laptop can be rotated left or right relative to the host computer after it is flipped up, so that the screen can be used not only facing the user, but also tilted relative to the user.

In order to prevent the screen from rotating too much along the rotation axis relative to the host, so that the screen and the host cannot be properly covered, or even excessive rotation and twisting the cable connecting the screen and the host, notebook manufacturers set a stopper on the rotation axis between the screen and the host. However, the strength of the stopper fixed to the rotation axis is not good, resulting in the stopper gradually rotating relative to the rotation axis after the user rotates the screen many times, and finally causing the stopper effect provided by it to fail. In view of this, notebook manufacturers are currently working to solve the above-mentioned problem.

The present invention provides a hinge assembly and a housing assembly of an electronic device, which can maintain a blocking effect of preventing excessive rotation of a screen, thereby preventing a cable from being damaged due to excessive twisting.

A hinge assembly disclosed in an embodiment of the present invention includes a fixed bracket, a rotating shaft, a rotating bracket and a cover. The rotating shaft is rotatably arranged on the fixed bracket. The rotating bracket is fixed to the rotating shaft. The rotating bracket has a first stop structure. The cover is at least partially located between the rotating bracket and the fixed bracket and sleeved on the rotating shaft. The fixed bracket or the cover has at least one second stop structure, and the first stop structure cooperates with at least one second stop structure to limit the rotation range of the rotating bracket.

Another embodiment of the present invention discloses a housing assembly of an electronic device, comprising a first housing, a second housing and a hinge assembly. The hinge assembly comprises a fixed bracket, a rotating shaft, a swivel bracket and a cover. The fixed bracket is fixed to the first housing. The rotating shaft is rotatably disposed on the fixed bracket. The swivel bracket is fixed to the rotating shaft and the second housing. The swivel bracket has a first stop structure. The cover is fixed to the first housing. The fixed bracket or the cover has at least one second stop structure. The first stop structure cooperates with at least one second stop structure to limit the rotation range of the swivel bracket.

According to the hinge assembly and the housing assembly of the electronic device disclosed in the above embodiment, the cover is fixed to the first housing, and the fixed bracket or the cover is provided with at least one second stop structure that matches the first stop structure of the rotating bracket to limit the rotation range of the rotating bracket. Since the fixed bracket and the cover are fixed to the first housing instead of the rotating shaft, when the second stop structure of the fixed bracket or the cover is hit by the first stop structure, the second stop structure of the fixed bracket or the cover can be more firmly assembled with the first housing to enhance the stop strength of the first stop structure of the fixed bracket or the cover. In this way, the fixed bracket or the cover can continue to provide the effect of stopping the rotating bracket and prevent the rotating bracket from excessive rotation.

The above description of the content of the present invention and the following description of the implementation method are used to demonstrate and explain the principle of the present invention and provide a further explanation of the scope of the patent application of the present invention.

Please refer to Figures 1 to 3. Figure 1 is a three-dimensional schematic diagram of an electronic device including a housing assembly according to an embodiment of the present invention. Figure 2 is a three-dimensional schematic diagram of a housing assembly of an electronic device according to an embodiment of the present invention. Figure 3 is an exploded schematic diagram of the hinge assembly of Figure 2.

In this embodiment, the housing assembly 1 of the electronic device 100 includes a first housing 10, a second housing 20 and a hinge assembly 30. The electronic device 100 is, for example, a laptop computer, the first housing 10 is, for example, a housing of a host computer, and the second housing 20 is, for example, a housing of a screen, but the present invention is not limited thereto, and any electronic device that needs to rotate relative to each other and needs to have a fixed rotation angle falls within the scope of protection of the present invention.

The hinge assembly 30 includes a fixed bracket 31, a rotating shaft 32, a rotating bracket 33 and a cover 34. In addition, the hinge assembly 30 further includes a first gasket 35, a plurality of second gaskets 36 and a stopper 37.

Next, please refer to Figures 2 to 5. Figure 4 is a schematic top view of the hinge assembly of Figure 3. Figure 5 is a schematic bottom view of the hinge assembly of Figure 3.

The fixing bracket 31 is fixed to the first housing 10 by, for example, a fixing member, such as a screw (not shown).

The rotating shaft 32 includes a column portion 321 and a flange portion 322, and the flange portion 322 protrudes from the column portion 321 in the radial direction of the column portion 321. The column portion 321 of the rotating shaft 32 passes through the first gasket 35, the fixing bracket 31 and the second gaskets 36 in sequence, and the column portion 321 of the rotating shaft 32 can rotate relative to the fixing bracket 31. In this embodiment, the through hole 311 through which the column portion 321 of the rotating shaft 32 passes through the fixing bracket 31 is a circular hole, so the fixing bracket 31 is not engaged with the column portion 321 of the rotating shaft 32, so that the column portion 321 of the rotating shaft 32 can rotate relative to the fixing bracket 31.

It should be noted that the number of the first gasket 35 and the second gasket 36 of the hinge assembly 30 is not intended to limit the present invention, but can be increased or decreased according to demand.

The stopper 37 is sleeved on one end of the column 321 of the shaft 32 and fixed to the column 321 of the shaft 32, so that the first gasket 35, the fixing bracket 31 and the second gaskets 36 are positioned between the flange 322 of the shaft 32 and the stopper 37. In this embodiment, the stopper 37 is fixed to the column 321 of the shaft 32 by, for example, matching the non-circular through hole 371 of the stopper 37 with the column 321 of the shaft 32.

In this embodiment, the stopper 37 has an outer ring surface 372 and an arc-shaped notch 373 recessed from the outer ring surface 372 . The fixing bracket 31 has a stopper protrusion 312 , and the stopper protrusion 312 is located in the arc-shaped notch 373 .

The rotating bracket 33 includes a base 331 and two rotating parts 332. The base 331 is sleeved on the other end of the column portion 321 of the rotating shaft 32, and the base 331 is fixed to the rotating shaft 32. In this embodiment, the base 331 is fixed to the column portion 321 of the rotating shaft 32, for example, by matching the non-circular through hole 3311 of the base 331 with the column portion 321 of the rotating shaft 32. The two rotating parts 332 are rotatably arranged on the base 331 and fixed to the second housing 20. The axis A1 of the two rotating parts 332 rotating relative to the base 331 is perpendicular to the axis A2 of the base 331 rotating relative to the fixed bracket 31 through the rotating shaft 32. In this way, the second housing 20 can be flipped along the axis A1 relative to the first housing 10 through the rotating member 332, for example, the second housing 20 as a screen can be opened or closed relative to the first housing 10 as a host, and the second housing 20 can be deflected along the axis A2 relative to the first housing 10 through the rotating shaft 32, for example, the second housing 20 as a screen can be deflected relative to the first housing 10 as the host so that the screen faces the host or the screen faces away from the host.

The cover 34 is made of metal, for example. The cover 34 includes a flat plate 341 and a vertical plate 342. The flat plate 341 is fixed to the first housing 10, for example, by a fixing member, such as a screw (not shown). The flat plate 341 is sleeved on the rotating shaft 32 and is located between the base 331 of the rotating bracket 33 and the fixed bracket 31. The vertical plate 342 stands vertically on the flat plate 341 and is fixed to the first housing 10, for example, by a screw (not shown). The vertical plate 342 can cover the fixed bracket 31 and a portion of the rotating shaft 32. It should be noted that the vertical plate 342 is an optional structure and can be omitted as required.

In this embodiment, the base 331 of the rotating bracket 33 has a first stop structure 3312. The first stop structure 3312 is, for example, a bump, and the first stop structure 3312 is formed on the surface of the base 331 facing the flat plate 341. In addition, the flat plate 341 of the cover body 34 has a second stop structure 3411. The second stop structure 3411 is, for example, a slide groove, and the second stop structure 3411 is formed on the surface of the flat plate 341 facing the base 331 of the rotating bracket 33. The first stop structure 3312 is movably positioned in the second stop structure 3411.

In this embodiment, the two opposite inner wall surfaces 34111, 34112 of the second stop structure 3411 and the first stop structure 3312 can limit the rotation range of the shaft 32, and the two opposite inner wall surfaces 3731, 3732 of the arc-shaped groove 373 and the stop protrusion 312 can also limit the rotation range of the shaft 32.

For details, please refer to FIG. 6 and FIG. 7 together with FIG. 4 and FIG. 5. FIG. 6 is a top view of the hinge assembly of FIG. 3 after the rotating bracket is rotated. FIG. 7 is a bottom view of the hinge assembly of FIG. 3 after the rotating bracket is rotated.

As shown in FIG. 4 and FIG. 5 , the first stopping structure 3312 abuts against the inner wall surface 34111 of the second stopping structure 3411 , and the stopping protrusion 312 abuts against the inner wall surface 3731 of the arc-shaped notch 373 . As shown in FIGS. 6 and 7 , when the rotating bracket 33 rotates relative to the fixed bracket 31 via the rotating shaft 32, the first stop structure 3312 moves toward the inner wall surface 34112 of the second stop structure 3411, and the inner wall surface 3732 of the arc-shaped notch 373 moves toward the stop protrusion 312. Once the first stop structure 3312 abuts against the inner wall surface 34112 of the second stop structure 3411, and the inner wall surface 3732 of the arc-shaped notch 373 abuts against the stop protrusion 312, the rotating bracket 33 can no longer continue to rotate relative to the fixed bracket 31.

Similarly, when the rotating bracket 33 rotates relative to the fixed bracket 31 via the rotating shaft 32, the first stopping structure 3312 moves toward the inner wall surface 34111 of the second stopping structure 3411, and the inner wall surface 3731 of the arc-shaped groove 373 moves toward the stopping protrusion 312, once the first stopping structure 3312 abuts against the inner wall surface 34111 of the second stopping structure 3411, and the inner wall surface 3731 of the arc-shaped groove 373 abuts against the stopping protrusion 312, the rotating bracket 33 can no longer continue to rotate relative to the fixed bracket 31.

Thus, the combination of the second stop structure 3411 and the first stop structure 3312 and the combination of the arc-shaped notch 373 and the stop protrusion 312 can limit the rotation range of the rotating bracket 33 to prevent the cable connecting the host and the screen from being damaged due to excessive twisting.

In this embodiment, the cover 34 is fixed to the first housing 10, and the cover 34 is provided with at least one second stop structure 3411 that matches the first stop structure 3312 of the rotating bracket 33 to limit the rotation range of the rotating bracket 33. Since the cover 34 is fixed to the first housing 10 instead of the rotating shaft, when the second stop structure 3411 of the cover 34 is hit by the first stop structure 3312, the stop strength of the second stop structure 3411 of the cover 34 against the first stop structure 3312 can be improved through a more secure assembly relationship between the cover 34 and the first housing 10. In this way, the cover 34 can continue to provide the effect of stopping the rotating bracket 33, thereby preventing the rotating bracket 33 from twisting the cable due to excessive rotation.

In addition, the arc-shaped notch 373 of the stopper 37 and the stopper protrusion 312 of the fixed bracket 31 can further enhance the effect of limiting the rotation range of the rotating bracket 33. It should be noted that the stopper 37 and the stopper protrusion 312 of the fixed bracket 31 are optional components and structures. If the first stopper structure of the rotating bracket and the second stopper structure of the cover are sufficient to limit the rotation range of the rotating bracket, the stopper and the stopper protrusion of the fixed bracket can be omitted.

On the other hand, the cover 34 made of metal can provide the cover 34 with better structural strength to continuously provide sufficient stopping effect. It should be noted that the material of the cover 34 is not limited to metal, but other materials with sufficient structural strength, such as plastic materials, can be selected according to needs.

In this embodiment, the first stop structure 3312 is a bump, and the second stop structure 3411 is a slide groove for illustration only. In other embodiments, the first stop structure can be a slide groove, and the second stop structure is a bump.

Next, please refer to Figures 8 and 9. Figure 8 is an exploded schematic diagram of a hinge assembly according to another embodiment of the present invention. Figure 9 is a top view schematic diagram of the hinge assembly of Figure 8.

The hinge assembly 30a of this embodiment is similar to the hinge assembly 30 described above with reference to FIGS. 1 to 7, and also includes a fixed bracket 31, a rotating shaft 32, a rotating bracket 33, a cover 34a, a first gasket 35, a second gasket 36 and a stopper 37. The difference between the two mainly lies in the different structures of the cover. Therefore, the following description mainly introduces the cover 34a of the hinge assembly 30a, and the other components of the hinge assembly 30a are described in the above description with reference to FIGS. 1 to 7, which will not be repeated.

In this embodiment, the cover 34a of the hinge assembly 30a includes a main body 341a and two assembly parts 342a. The main body 341a is, for example, made of plastic material. The main body 341a includes a flat plate 3411a and a vertical plate 3412a. The flat plate 3411a is fixed to the first housing (such as the first housing 10 shown in FIG. 2 ), and the flat plate 3411a is located between the base 331 of the rotating bracket 33 and the fixed bracket 31, and the vertical plate 3412a stands upright on the flat plate 3411a. The two assembly parts 342a are, for example, made of metal material. The two assembly parts 342a are installed on the plate 3411a of the main body 341a. The two assembly parts 342a are located between the plate 3411a and the base 331 of the rotating bracket 33. The two assembly parts 342a are located on two opposite sides of the rotating shaft 32.

In this embodiment, the first stop structure 3312 of the base 331 of the rotating bracket 33 is, for example, a convex block, and the first stop structure 3312 is formed on the surface of the base 331 facing the two assembly parts 342a. In addition, the two assembly parts 342a each have a second stop structure 3421a. The second stop structure 3421a is, for example, a limiting groove. The two second stop structures 3421a are respectively formed on the surface of the two assembly parts 342a facing the base 331 of the rotating bracket 33. The first stop structure 3312 can move between the inner wall surfaces 34211a of the two second stop structures 3421a that are far away from each other. In this way, the combination of the first stop structure 3312 and the two second stop structures 3421a can limit the rotation range of the rotating bracket 33.

In this embodiment, the second stop structures 3421a of the two assembly parts 342a are not formed into a continuous slide groove, so during the process of assembling the cover 34a, the rotating bracket 33 can be rotated to a position where the first stop structure 3312 does not interfere with the two assembly parts 342a of the cover 34a, so that the flat plate 3411a of the cover 34a can be directly mounted on the rotating shaft 32. Then, the rotating bracket 33 is rotated to allow the first stop structure 3312 to enter the second stop structure 3421a of one of the assembly parts 342a. In other words, since the second stop structure 3421a of the second assembly part 342a is not formed into a continuous slide groove, during the process of assembling the cover body 34a, it is not necessary to adjust the assembly angle of the cover body 34a in order to allow the first stop structure 3312 to enter the continuous slide groove, thereby improving the convenience of assembling the cover body 34a.

In this embodiment, the first stop structure 3312 (such as a convex block) of the base 331 of the rotating bracket 33 and the second stop structure 3421a (such as a limiting groove) of the two assembly parts 342a of the cover body 34a are used to limit the rotation range of the rotating bracket 33, but the present invention is not limited thereto. In other embodiments, the cover body may not have two assembly parts, and the rotating bracket may further include two assembly parts, the two assembly parts are assembled on the base of the rotating bracket and each has a first stop structure (such as a limiting groove), and the flat plate of the cover body may have a second stop structure (such as a convex block). In this way, the combination of the two first stop structures of the two assembly parts of the base of the rotating bracket and the second stop structure of the flat plate of the cover body can also limit the rotation range of the rotating bracket.

Next, please refer to Figures 10 and 11. Figure 10 is an exploded schematic diagram of a hinge assembly according to another embodiment of the present invention. Figure 11 is a top view of the hinge assembly of Figure 10.

The hinge assembly 30b of the present embodiment is similar to the hinge assembly 30 described above with reference to FIGS. 1 to 7, and also includes a fixed bracket 31, a rotating shaft 32, a rotating bracket 33, a cover 34b, a first gasket 35, a second gasket 36 and a stopper 37. The difference between the two mainly lies in the different structures of the cover. Therefore, the following description mainly introduces the cover 34b of the hinge assembly 30b, and the other components of the hinge assembly 30b are described in the above description with reference to FIGS. 1 to 7, which will not be described in detail.

In this embodiment, the flat plate 341b of the cover 34b has two second stop structures 3411b. The two second stop structures 3411b are, for example, limit blocks. The two second stop structures 3411b protrude from the surface of the flat plate 341b of the cover 34b facing the base 331 of the rotating bracket 33. The first stop structure 3312 of the base 331 of the rotating bracket 33 can move between the two second stop structures 3411b to limit the rotation range of the rotating bracket 33.

In this embodiment, the rotation range of the rotating bracket 33 is limited by the combination of the two second stop structures 3411b (such as limiting blocks) of the flat plate 341b of the cover 34b and the first stop structure 3312 (such as a protrusion) of the base 331 of the rotating bracket 33, but the present invention is not limited thereto. In other embodiments, the base of the rotating bracket may have two first stop structures (such as limiting blocks), and the flat plate of the cover may have a second stop structure (such as a protrusion). In this way, the combination of the second stop structure of the flat plate of the cover and the two first stop structures of the base of the rotating bracket can also limit the rotation range of the rotating bracket.

In addition, the plate 341b of the cover 34b is not limited to having two second stop structures 3411b (such as limit blocks). In other embodiments, the plate of the cover does not have two second stop structures (such as limit blocks), but the fixing bracket may have two second stop structures (such as limit blocks). For example, please refer to Figures 12 and 13. Figure 12 is an exploded schematic diagram of a hinge assembly disclosed according to another embodiment of the present invention. Figure 13 is a top view schematic diagram of the hinge assembly of Figure 12.

The hinge assembly 30c of this embodiment is similar to the hinge assembly 30b described above with reference to FIGS. 10 and 11 . The difference between the two mainly lies in the different structures of the cover and the fixing bracket. Therefore, the following description mainly introduces the cover 34c and the fixing bracket 31c of the hinge assembly 30c, and other components of the hinge assembly 30c are not described in detail.

In this embodiment, the cover 34c has two guide grooves 3411c, and the two guide grooves 3411c are located around the rotating shaft 32. The fixed bracket 31c has two second stop structures 311c (such as limiting blocks), and the two second stop structures 311c are respectively located in the two guide grooves 3411c. The first stop structure 3312 (such as a protrusion) of the rotating bracket 33 can move between the two guide grooves 3411c to cooperate with the two second stop structures 311c of the fixed bracket 31c to limit the rotation range of the rotating bracket 33.

In this embodiment, the rotation range of the rotating bracket 33 is limited by the combination of the two second stop structures 311c (such as limiting blocks) of the fixed bracket 31c and the first stop structure 3312 (such as a protrusion) of the rotating bracket 33, but the present invention is not limited thereto. In other embodiments, the rotating bracket may have two first stop structures (such as limiting blocks), and the fixed bracket may have a second stop structure (such as a protrusion). In this way, the combination of the second stop structure of the fixed bracket and the two first stop structures of the rotating bracket can also limit the rotation range of the rotating bracket.

In addition, the number and type of the second stop structure 311c of the fixed bracket 31c are not intended to limit the present invention. In other embodiments, the fixed bracket may have a single second stop structure, and the second stop structure may be a slide groove, and the two guide grooves of the cover body are in the form of through grooves. In this way, the first stop structure (such as a protrusion) of the rotating bracket can pass through the guide groove of the cover body and move in the second stop structure of the fixed bracket, and the rotation range is limited by the two opposite wall surfaces of the second stop structure of the fixed bracket.

According to the hinge assembly and the housing assembly of the electronic device disclosed in the above embodiment, the cover is fixed to the first housing, and the fixed bracket or the cover is provided with at least one second stop structure that matches the first stop structure of the rotating bracket to limit the rotation range of the rotating bracket. Since the fixed bracket and the cover are fixed to the first housing instead of the rotating shaft, when the second stop structure of the fixed bracket or the cover is hit by the first stop structure, the second stop structure of the fixed bracket or the cover can be more firmly assembled with the first housing to enhance the stop strength of the first stop structure of the fixed bracket or the cover. In this way, the fixed bracket or the cover can continue to provide the effect of stopping the rotating bracket, thereby preventing the rotating bracket from twisting the cable due to excessive rotation.

In addition, the effect of limiting the rotatable range of the rotating bracket can be further enhanced by matching the arc-shaped notch of the stop plate with the stop convex portion of the fixed bracket.

Although the present invention is disclosed as above with the aforementioned preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be subject to the scope of the patent application attached to this specification.

1: housing assembly 10: first housing 100: electronic device 20: second housing 30,30a,30b,30c: hinge assembly 31,31c: fixed bracket 311: through hole 312: stop convex part 32: rotating shaft 321: column part 322: flange part 33: rotating bracket 331: base 3311: through hole 3312: first stop structure 332: rotating member 34,34a,34b,34c: cover 341,341b: plate 311c,3411,3411b,3421a: second stop structure 34111,34112: Inner wall surface 342: Vertical plate 35: First gasket 36: Second gasket 37: Stop plate 371: Perforation 372: Outer ring surface 373: Arc notch 3731,3732: Inner wall surface A1,A2: Axis 341a: Main body 3411a: Flat plate 3411c: Guide groove 3412a: Vertical plate 342a: Assembly part 34211a: Inner wall surface

FIG. 1 is a three-dimensional schematic diagram of an electronic device including a housing assembly according to one embodiment of the present invention. FIG. 2 is a three-dimensional schematic diagram of a housing assembly of an electronic device according to one embodiment of the present invention. FIG. 3 is a schematic diagram of an exploded view of the hinge assembly of FIG. 2. FIG. 4 is a schematic diagram of a top view of the hinge assembly of FIG. 3. FIG. 5 is a schematic diagram of a bottom view of the hinge assembly of FIG. 3. FIG. 6 is a schematic diagram of a top view of the hinge assembly of FIG. 3 after the rotating bracket is rotated. FIG. 7 is a schematic diagram of a bottom view of the hinge assembly of FIG. 3 after the rotating bracket is rotated. FIG. 8 is a schematic diagram of an exploded view of a hinge assembly according to another embodiment of the present invention. FIG. 9 is a schematic diagram of a top view of the hinge assembly of FIG. 8. FIG. 10 is a schematic diagram of an exploded view of a hinge assembly according to another embodiment of the present invention. FIG. 11 is a schematic diagram of a top view of the hinge assembly of FIG. 10 . FIG. 12 is a schematic diagram of an exploded view of a hinge assembly according to another embodiment of the present invention. FIG. 13 is a schematic diagram of a top view of the hinge assembly of FIG. 12 .

30: Hinge assembly

31:Fixed bracket

311:Piercing

312: Stop convex part

32: Rotating axis

321: Column part

322: flange

33: Rotating bracket

331: Base

3311:Piercing

3312: First stop structure

332: Rotating parts

34: Cover

341: Tablet

3411: Second stop structure

34111,34112: Inner wall

342: Vertical board

35: First gasket

36: Second gasket

37: Stop plate

371:Piercing

372: Outer Ring

373: Arc-shaped notch

3731,3732: Inner wall

Claims (18)

A hinge assembly comprises: a fixed bracket; a rotating shaft rotatably disposed on the fixed bracket; a rotating bracket fixed to the rotating shaft, the rotating bracket having a first stop structure; and a cover body, at least partly located between the rotating bracket and the fixed bracket and sleeved on the rotating shaft; wherein the cover body comprises a flat plate, the flat plate is located between the rotating bracket and the fixed bracket; wherein the fixed bracket or the cover body has at least one second stop structure, the first stop structure cooperates with the at least one second stop structure to limit the rotation range of the rotating bracket. The hinge assembly as described in claim 1, wherein the first stop structure is formed on the surface of the rotating bracket facing the plate, and the at least one second stop structure is formed on the surface of the plate facing the rotating bracket. The hinge assembly as described in claim 1, wherein the first stop structure is a protrusion, the at least one second stop structure is a slide groove, and the first stop structure is movably disposed in the at least one second stop structure. The hinge assembly as described in claim 1, wherein the first stop structure is a protrusion, the at least one second stop structure is a limit block, and the number of the at least one second stop structure is two, and the first stop structure can move between the two second stop structures. The hinge assembly as described in claim 4, wherein the cover has two guide grooves, the two guide grooves are located around the rotating shaft, the fixed bracket has two second stop structures, the two second stop structures are respectively located in the two guide grooves, and the first stop structure can move between the two guide grooves to cooperate with the two second stop structures to limit the rotation range of the rotating bracket. The hinge assembly as described in claim 1 further includes a stopper, which is sleeved and fixed on the rotating shaft, and has an outer ring surface and an arc-shaped notch formed by a depression from the outer ring surface. The fixed bracket has a stopper protrusion, and the stopper protrusion is located in the arc-shaped notch. A housing assembly of an electronic device comprises: a first housing; a second housing; and a hinge assembly, comprising: a fixed bracket fixed to the first housing; a rotating shaft rotatably disposed on the fixed bracket; a rotating bracket fixed to the rotating shaft and the second housing, the rotating bracket having a first stop structure; and a cover body, comprising a flat plate fixed to the first housing, the flat plate being located between the rotating bracket and the fixed bracket; Wherein, the fixed bracket or the cover body has at least one second stop structure, the first stop structure cooperates with the at least one second stop structure to limit the rotation range of the rotating bracket. The housing assembly of the electronic device as described in claim 7, wherein the cover includes a vertical plate, the vertical plate is vertically disposed on the flat plate, the first stop structure is formed on the surface of the rotating bracket facing the flat plate, and the at least one second stop structure is formed on the surface of the flat plate facing the rotating bracket. The housing assembly of the electronic device as described in claim 7, wherein the first stop structure is a protrusion, the at least one second stop structure is an arc-shaped slide groove, and the first stop structure is movably disposed in the at least one second stop structure. As described in claim 7, the housing assembly of the electronic device, wherein the hinge assembly further comprises a stopper, the stopper is sleeved and fixed on the rotating shaft, the stopper has an outer ring surface and an arc-shaped notch formed by the depression of the outer ring surface, and the fixing bracket has a stopper protrusion, and the stopper protrusion is located in the arc-shaped notch. The housing assembly of the electronic device as described in claim 7, wherein the cover is made of metal or plastic. The housing assembly of the electronic device as described in claim 7, wherein the cover comprises a main body and two assembly parts, the main body is fixed to the first housing, the two assembly parts are mounted on the main body, the number of the at least one second stop structure is two, the two second stop structures are respectively located on the two assembly parts, and the first stop structure can move between the two second stop structures. The housing assembly of the electronic device as described in claim 12, wherein the main body of the cover includes the flat plate and a vertical plate, the vertical plate stands upright on the flat plate, the two assembly parts are located between the flat plate and the rotating bracket, the first stop structure is formed on the surface of the rotating bracket facing the two assembly parts, and the two second stop structures are respectively formed on the surfaces of the two assembly parts facing the rotating bracket. The housing assembly of the electronic device as described in claim 12, wherein the first stop structure is a protrusion and the second stop structures are limit grooves. The housing assembly of the electronic device as described in claim 12, wherein the main body is made of plastic material and the two assembly parts are made of metal material. The housing assembly of the electronic device as described in claim 7, wherein the rotating bracket comprises a base and two rotating parts, the base is fixed to the rotating shaft, the two rotating parts are rotatably arranged on the base and fixed to the second housing, and the axis of rotation of the two rotating parts relative to the base is perpendicular to the axis of rotation of the base relative to the fixed bracket through the rotating shaft. The housing assembly of the electronic device as described in claim 7, wherein the first stop structure is a protrusion, the at least one second stop structure is a limit block, and the number of the at least one second stop structure is two, and the first stop structure can move between the two second stop structures. As described in claim 17, the housing assembly of the electronic device, wherein the cover has two guide grooves, the two guide grooves are located around the rotating shaft, the fixed bracket has two second stop structures, the two second stop structures are respectively located in the two guide grooves, and the first stop structure can move between the two guide grooves to cooperate with the two second stop structures to limit the rotation range of the rotating bracket.

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