Hinge assembly and electronic device

Abstract

A hinge assembly and an electronic device. The hinge assembly comprises a hinge cover (100) and a hinge support (200); the hinge cover is provided with a mounting groove (170), the mounting groove being provided with a first side wall (110) extending in the width direction of the hinge cover; the hinge support is provided with a fitting part (210), the fitting part being located in the mounting groove; the fitting part comprises a first end surface (211) extending in the width direction of the hinge support, the first side wall being in clearance fit with the first end surface, and the distance between the first side wall and the first end surface being less than a first preset value. The hinge assembly can withstand relatively great resistance to deformation, such that the drop stability of the hinge assembly can be enhanced and the phenomenon of the hinge cover deforming and bulging can be mitigated. In addition, the hinge assembly can provide better support for other parts of an electronic device so as to improve the drop reliability of the entire device.

Description

Hinge assemblies and electronic devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on March 25, 2024, with application number 202410342823.6 and invention name “Hinge Assembly and Electronic Device”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application belongs to the technical field of electronic products, and specifically relates to a hinge assembly and an electronic device. Background Art

[0004] With the rapid development of foldable electronic devices, the size of electronic devices is developing towards being lighter and thinner with lower power consumption. However, the thinness of the entire device will greatly compress the design space of related structural parts. When using certain materials, this will reduce the structural strength of the entire device, and thus bring risks to the drop reliability of the entire device.

[0005] Foldable electronic devices typically include a hinge assembly that rotatably connects a first body and a second body. When the electronic device is dropped, the end surfaces of the first and second bodies are first deformed. When deformed to the point of contact with the hinge assembly, the force is ultimately transmitted to the hinge assembly. Therefore, the strength of the hinge assembly is crucial to the drop reliability of the entire device. However, due to insufficient hinge strength, the hinge cover of the hinge assembly may deform during a drop, shortening the lifespan of the foldable electronic device.

[0006] In summary, the hinge assembly involved in the related art has the problem of poor drop stability. Summary of the Invention

[0007] An embodiment of the present application provides a hinge assembly, including a hinge cover and a hinge bracket, wherein the hinge cover is provided with a mounting groove, and the mounting groove has a first side wall extending along the width direction of the hinge cover; the hinge bracket is provided with a mating portion, the mating portion is located in the mounting groove, the mating portion includes a first end face extending along the width direction of the hinge bracket, the first side wall is gap-fitted with the first end face, and the distance between the first side wall and the first end face is less than a first preset value.

[0008] An embodiment of the present application provides an electronic device, comprising a first body, a second body, and the hinge assembly described above, wherein the first body and the second body are rotatably connected via the hinge assembly, and during the mutual rotation of the first body and the second body, the electronic device switches between an unfolded state and a folded state.

[0009] In an embodiment of the present application, the first side wall of the mounting groove on the hinge cover is gap-matched with the first end face of the matching portion on the hinge bracket, and the distance between the first side wall and the first end face is less than a first preset value, that is, at this time, the matching gap between the first side wall and the first end face is small, and thus the matching gap between the hinge cover and the hinge bracket is small. When the force generated by the electronic device falling is transmitted to the hinge cover, the gap can compensate for the deformation of the hinge cover more quickly, and the matching portion can support the hinge cover, thereby limiting the hinge cover from continuing to deform. That is, this setting method can enhance the overall stiffness and strength of the hinge assembly, so that the hinge assembly can withstand a larger deformation resistance, that is, the hinge assembly is not easy to deform, thereby improving the falling stability of the hinge assembly, and can alleviate the deformation and bulging phenomenon of the hinge cover. At the same time, the hinge assembly can provide better support for other parts of the electronic device, thereby improving the falling reliability of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a schematic diagram of a partial structure of a first hinge bracket disclosed in an embodiment of the present application;

[0011] FIG2 is a schematic diagram of a partial structure of a first hinged cover disclosed in an embodiment of the present application;

[0012] FIG3 is a partial cross-sectional structural diagram of the first hinge assembly disclosed in an embodiment of the present application;

[0013] FIG4 is a schematic diagram of a partial structure of a second hinge bracket disclosed in an embodiment of the present application;

[0014] FIG5 is a schematic diagram of a partial structure of a second hinged cover disclosed in an embodiment of the present application;

[0015] FIG6 is a partial cross-sectional structural diagram of a second hinge assembly disclosed in an embodiment of the present application;

[0016] FIG7 is a schematic diagram of a partial structure of a third hinge bracket disclosed in an embodiment of the present application;

[0017] FIG8 is a partial cross-sectional structural diagram of a third hinge assembly disclosed in an embodiment of the present application;

[0018] FIG9 is a schematic diagram of a partial structure of a fourth hinge bracket disclosed in an embodiment of the present application;

[0019] FIG10 is a schematic diagram of a partial structure of a third hinged cover disclosed in an embodiment of the present application;

[0020] FIG11 is a partial cross-sectional structural diagram of a fourth hinge assembly disclosed in an embodiment of the present application;

[0021] FIG12 is a schematic structural diagram of a hinge assembly disclosed in an embodiment of the present application;

[0022] 13 to 15 are schematic structural diagrams of electronic devices disclosed in embodiments of the present application.

[0023] Explanation of the accompanying drawings: 100-hinge cover, 110-first side wall, 120-outer wall, 130-first connecting hole, 140-second connecting hole, 150-second bonding surface, 160-snapping groove, 170-installing groove, 171-positioning column; 200-hinge bracket, 210-matching part, 211-first end surface, 212-first surrounding surface, 213-second surrounding surface, 214-first surface, 215-buffer recess, 216-positioning hole, 220-first edge, 230-second edge, 240-connecting part, 250-first bonding surface; 300-first body; 400-second body; 500-snapping. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0025] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0026] The hinge assembly disclosed in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0027] Please refer to Figures 1 to 15. The present application discloses a hinge assembly, which includes a hinge cover 100 and a hinge bracket 200.

[0028] The hinge cover 100 is an outer protective shell of the hinge assembly. The hinge bracket 200 is a basic component of the hinge assembly. The hinge cover 100 is provided on the hinge bracket 200 so that the hinge cover 100 can protect the hinge bracket 200 .

[0029] The hinge cover 100 is provided with a mounting groove 170 , and the mounting groove 170 has a first side wall 110 extending along the width direction of the hinge cover 100 . In the thickness direction of the hinge cover 100 , the first side wall 110 has a certain size.

[0030] A mating portion 210 is protruding from the hinge bracket 200, and the mating portion 210 is located in the mounting groove 170 to improve the structural compactness of the hinge assembly. The mating portion 210 includes a first end face 211 extending along the width direction of the hinge bracket 200, and in the thickness direction of the hinge bracket 200, the first end face 211 has a certain size, and the first side wall 110 and the first end face 211 are clearance-fitted, that is, the distance between the first side wall 110 and the first end face 211 is small. At the same time, the distance between the first side wall 110 and the first end face 211 is less than a first preset value, that is, the first side wall 110 and the first end face 211 have a sufficiently small distance so that when the hinge assembly falls and deforms, the sufficiently small distance can compensate for the deformation of the hinge cover 100 more quickly.

[0031] Moreover, when the first side wall 110 contacts the first end face 211, since the first side wall 110 and the first end face 211 both have certain dimensions in the thickness direction of the hinge assembly, this makes the first side wall 110 and the first end face 211 have a certain contact area, and thus the first end face 211 can stably support the first side wall 110, that is, the mating portion 210 can stably support the hinge cover 100.

[0032] In the embodiment of the present application, the first side wall 110 of the mounting groove 170 on the hinge cover 100 is clearance-fitted with the first end face 211 of the matching portion 210 on the hinge bracket 200, and the distance between the first side wall 110 and the first end face 211 is less than a first preset value. That is, at this time, the fitting clearance between the first side wall 110 and the first end face 211 is small, and thus the fitting clearance between the hinge cover 100 and the hinge bracket 200 is small. When the force generated by the electronic device falling is transmitted to the hinge cover 100, the gap can quickly compensate for the deformation of the hinge cover 100, and the matching portion 210 can support the hinge cover 100, thereby limiting the hinge cover 100 from further deformation. That is, this arrangement can enhance the overall rigidity and strength of the hinge assembly, so that the hinge assembly can withstand a larger deformation resistance, that is, the hinge assembly is not easily deformed, thereby improving the falling stability of the hinge assembly and alleviating the deformation and bulging of the hinge cover 100. At the same time, the hinge assembly can provide better support for other parts of the electronic device, thereby improving the falling reliability of the entire device.

[0033] The hinge cover 100 is provided with a connection hole spaced apart from the mounting groove 170, and the hinge bracket 200 is provided with a connecting member 240. The connecting member 240 cooperates with the connection hole, i.e., the connecting member 240 is connected to the connection hole, thereby achieving the purpose of connecting the hinge cover 100 and the hinge bracket 200. The fitting clearance between the connecting member 240 and the connection hole is the aforementioned first preset value, i.e., the fitting clearance between the first side wall 110 and the first end face 211 is less than the fitting clearance between the connecting member 240 and the connection hole. Of course, the first preset value here can also be flexibly selected from other values ​​according to actual conditions, and the embodiments of the present application are not limited to this.

[0034] Alternatively, the clearance between the first sidewall 110 and the first end surface 211 may be determined solely based on a first preset value. In another embodiment, a positioning post 171 protrudes from the mounting groove 170, and a positioning hole 216 is defined in the mating portion 210. The positioning post 171 and the positioning hole 216 are positioned and mated together. Specifically, the positioning post 171 and the positioning hole 216 can assist in positioning the hinge cover 100 and the hinge bracket 200, thereby facilitating connection of the hinge cover 100 and the hinge bracket 200 via the connector 240 and the connecting hole. The fitting clearance between the positioning column 171 and the positioning hole 216 is a second preset value, and the distance between the first side wall 110 and the first end face 211 is greater than the second preset value, that is, the fitting clearance between the first side wall 110 and the first end face 211 can also be determined based on the fitting clearance between the positioning column 171 and the positioning hole 216, so that the fitting clearance between the first side wall 110 and the first end face 211 can be within a more appropriate range, so as to effectively compensate for the deformation of the hinge cover 100 and limit the hinge cover 100 from continuing to deform.

[0035] Optionally, the clearance between the first side wall 110 and the first end face 211 can be 0.02 mm, that is, the distance between the first side wall 110 and the first end face 211 can be set to 0.02 mm. This distance can effectively compensate for deformation of the hinge cover 100, and the first end face 211 can limit further deformation of the hinge cover 100. Of course, the clearance between the first side wall 110 and the first end face 211 can also be other values, as long as it is between the first preset value and the second preset value.

[0036] Optionally, the connecting hole is arranged near the outer side wall 120 of the hinge cover 100, and the outer side wall 120 is a side wall extending along the width direction of the hinge cover 100 at the edge of the hinge cover 100, and the distance between the first end face 211 and the outer side wall 120 is a first distance, and the distance between the center of the connecting hole and the outer side wall 120 is a second distance. The first distance can be greater than the second distance, that is, at this time, for the outer side wall 120, between the first end face 211 and the connecting hole, the connecting hole is arranged closer to the outer side wall 120.

[0037] In another embodiment, the first distance is smaller than the second distance, that is, between the first end surface 211 and the connection hole, the first end surface 211 is positioned closer to the outer side wall 120, and the first side wall 110 is also positioned closer to the outer side wall 120. In this case, when the electronic device is dropped and deformed, the hinge cover 100 is deformed by force, and the resulting force is quickly transmitted to the first end surface 211. The first end surface 211 can resist the deformation of the hinge cover 100, thereby effectively preventing the hinge cover 100 from deforming and bulging. In addition, the longer mating portion 210 in this embodiment increases the length of the entire hinge bracket 200, thereby increasing its structural strength and better limiting further deformation of the hinge cover 100.

[0038] Optionally, the connection holes may include only the first connection hole 130 .

[0039] In another embodiment, please refer to Figures 1 to 3, the connecting hole may also include a second connecting hole 140, the first connecting hole 130 and the second connecting hole 140 are arranged at intervals along the width direction of the hinge cover 100, and correspondingly, the connecting member 240 includes at least two connecting members, and at least two connecting members 240 are arranged at intervals along the width direction of the hinge bracket 200, that is, the embodiment of the present application connects the hinge cover 100 and the hinge bracket 200 by a one-to-one connection between multiple connecting holes and multiple connecting members 240, which can improve the structural stability of the hinge assembly.

[0040] In this embodiment, the first side wall 110 is located between the first connecting hole 130 and the second connecting hole 140, and correspondingly, the first end face 211 is also located between the first connecting hole 130 and the second connecting hole 140, that is, the first side wall 110 and the first end face 211 are relatively centrally arranged in the width direction of the hinge assembly. When the end of the hinge cover 100, that is, any area of ​​the outer wall 120 described above is subjected to force and deformed, the generated force is transmitted to the first end face 211 at a faster speed, and thus the first end face 211 can quickly resist the deformation of the hinge cover 100.

[0041] As mentioned above, the first sidewall 110 may be located between the first connection hole 130 and the second connection hole 140 .

[0042] In another embodiment, please refer to Figures 4 to 6, the mating portion 210 has a first surrounding surface 212 and a second surrounding surface 213, the first surrounding surface 212 is arranged around the first connecting hole 130, that is, the first surrounding surface 212 is arranged around the connecting piece 240 that cooperates with the first connecting hole 130, and the second surrounding surface 213 is arranged around the second connecting hole 140, that is, the second surrounding surface 213 is arranged around the connecting piece 240 that cooperates with the second connecting hole 140, and a portion of the first surrounding surface 212 and a portion of the second surrounding surface 213 are both located between the first connecting hole 130 and the second connecting hole 140.

[0043] In this embodiment, the first end surface 211 is a surface that is arranged opposite to the first surrounding surface 212 and the second surrounding surface 213, and the first side wall 110 is located on the side of the first end surface 211 that is away from the first surrounding surface 212 and the second surrounding surface 213, that is, the first side wall 110 is arranged away from the first connecting hole 130 and the second connecting hole 140, and the first end surface 211 is arranged away from the connecting member 240, and then the first side wall 110 and the first end surface 211 are arranged close to the outer wall 120 described above, and at this time, the size of the first side wall 110 and the first end surface 211 in the width direction of the hinge assembly is not limited by the position of the first connecting hole 130 and the second connecting hole 140, that is, the embodiment of the present application can increase the size of the first side wall 110 and the first end surface 211, thereby increasing the area of ​​the first side wall 110 and the first end surface 211, and then increasing the matching area of ​​the two, that is, increasing the force support area of ​​the matching portion 210, which can further enhance the overall stiffness and strength of the hinge assembly, so that it can withstand greater deformation resistance during a fall.

[0044] Optionally, the hinge bracket 200 has two edges facing away from each other along its width direction, namely a first edge 220 and a second edge 230. One end of the first end surface 211 can extend to the first edge 220, and the other end of the first end surface 211 can extend to the second edge 230. In this case, the area of ​​the first end surface 211 is further increased, and the mating area between the first side wall 110 and the first end surface 211 is further increased, that is, the force-supporting area of ​​the mating portion 210 is further increased. This can further enhance the overall rigidity and strength of the hinge assembly, thereby further improving the hinge assembly's ability to resist deformation under force. Of course, one end of the first end surface 211 may not extend to the first edge 220, and the other end of the first end surface 211 may also not extend to the second edge 230.

[0045] Optionally, please refer to Figures 1 to 8, the connecting member 240 can be a threaded connecting member, and correspondingly, the connecting hole can be a threaded hole, and a through hole can be opened on the hinge bracket 200. During the specific assembly of the hinge assembly, one end of the connecting member 240 passes through the through hole and cooperates with the connecting hole thread, thereby achieving the purpose of connecting the hinge cover 100 and the hinge bracket 200.

[0046] In another embodiment, referring to Figures 9 to 11 , the connecting member 240 is a connecting post protruding from the hinge bracket 200. That is, the connecting post is integrally formed with the hinge bracket 200. During the connection between the hinge cover 100 and the hinge bracket 200, the connecting post engages with the connecting hole and is bonded together. That is, adhesive is filled between the connecting post and the connecting hole. On the one hand, the adhesive further connects the hinge cover 100 and the hinge bracket 200 based on the engagement of the connecting post with the connecting hole, thereby enhancing the connection strength between the two. On the other hand, because the adhesive is made of a relatively soft material, when the hinge assembly is deformed by external force, the adhesive can cushion the deformation. That is, the adhesive can absorb energy to protect the hinge assembly and prevent it from deforming due to excessive force.

[0047] Optionally, the present application may connect the hinge cover 100 and the hinge bracket 200 and buffer the deformation of the hinge assembly by stress only by filling adhesive between the connecting column and the connecting hole.

[0048] In another embodiment, the hinge bracket 200 has a first bonding surface 250, which is arranged around the connecting column, and the hinge cover 100 has a second bonding surface 150, which is arranged around the connecting hole, and the first bonding surface 250 is bonded to the second bonding surface 150, that is, the first bonding surface 250 and the second bonding surface 150 are bonded to each other through an adhesive layer, which can increase the bonding area between the hinge cover 100 and the hinge bracket 200, thereby further improving the connection stability between the hinge cover 100 and the hinge bracket 200, and since the embodiment of the present application uses more adhesive, it has a better effect on buffering deformation of the hinge assembly, and thus a better protection effect on the hinge assembly.

[0049] Alternatively, referring to Figures 7 and 8, the mating portion 210 has a first surface 214 that faces the hinge cover 100 along the thickness direction of the hinge cover 100. That is, the first surface 214 is the upper surface of the mating portion 210, and the first surface 214 is disposed adjacent to the first end surface 211. A buffer recess 215 is defined on the first surface 214 to absorb deformation energy. Specifically, when the first side wall 110 deforms with the hinge cover 100 to contact the first end surface 211, the first end surface 211 begins to support the hinge cover 100. At this point, the buffer recess 215 is deformed by force, thereby absorbing the energy generated by the deformation of the hinge cover 100. That is, the buffer recess 215 can buffer the deformation of the hinge cover 100, thereby reducing the degree of deformation of the hinge assembly. Of course, the first surface 214 may not have a buffer recess 215 defined thereon.

[0050] Optionally, the buffer recess 215 may be disposed away from the first end surface 211 .

[0051] In another embodiment, the buffer recess 215 is provided near the first end surface 211. When the first end surface 211 is subjected to a force from the first side wall 110, the buffer recess 215 can quickly absorb energy, thereby quickly buffering the deformation of the hinge cover 100, thereby bringing a better buffering effect.

[0052] Optionally, the buffer recess 215 may be a buffer groove.

[0053] In another embodiment, the buffer recess 215 is a buffer hole that passes through the hinge bracket 200. On the one hand, the buffer space of the buffer hole is relatively large, making it easier to achieve the buffering effect. On the other hand, the buffer hole can reduce the weight of the hinge bracket 200 to a certain extent, thereby reducing the weight of the hinge assembly.

[0054] Optionally, the number of the first side wall 110 may be one, and correspondingly, the number of the matching portion 210 may also be one.

[0055] In another embodiment, the number of the first side walls 110 is at least two, and the at least two first side walls 110 are spaced apart along the length direction of the hinge cover 100, that is, the at least two first side walls 110 are arranged near the two opposite ends of the hinge cover 100, and the at least two first side walls 110 can be two oppositely arranged side walls of the same mounting groove 170. Of course, they can also be side walls of different mounting grooves 170, and in this case, the at least two first side walls 110 are oppositely arranged. Correspondingly, the number of mating parts 210 is also at least two, and each mating part 210 can be located in the same mounting groove 170 or in different mounting grooves 170, and each mating part 210 is provided with a first end face 211, that is, the number of first end faces 211 is at least two, and each first side wall 110 corresponds to each first end face 211 one by one, and is clearance-fitted, that is, the spacing between each first side wall 110 and the corresponding first end face 211 is small. At the same time, the distance between each first side wall 110 and the corresponding first end face 211 is less than the first preset value, that is, there is a sufficiently small spacing between each first side wall 110 and the corresponding first end face 211, so that when the hinge assembly falls and deforms, the sufficiently small spacing can compensate for the deformation of the hinge cover 100 more quickly.

[0056] In this embodiment, since the at least two first side walls 110 are arranged relative to each other, the at least two first end faces 211 are arranged back to back. At this time, the hinge assembly can resist deformation in different directions, that is, the hinge assembly is less likely to be deformed by falling, and this arrangement can further improve the falling stability of the hinge assembly.

[0057] Optionally, the present application also discloses an electronic device, which includes a first body 300, a second body 400 and the hinge assembly described above. The first body 300 and the second body 400 are rotatably connected through the hinge assembly. During the mutual rotation of the first body 300 and the second body 400, the electronic device switches between an unfolded state and a folded state, that is, the hinge assembly can realize the opening and closing function of the electronic device.

[0058] Optionally, the electronic device may further include a buckle 500, and a buckle slot 160 may be provided on the hinge cover 100. One end of the buckle 500 is connected to the main screen of the electronic device, i.e., the flexible display screen, and the other end of the buckle 500 cooperates with the buckle slot 160, thereby achieving the purpose of stably locking the main screen of the electronic device on the hinge assembly to ensure the stability of the overall structure of the electronic device.

[0059] In addition, since the hinge assembly can provide better support for other parts of the electronic device, that is, it can provide better support for the first body 300 and the second body 400, this can effectively reduce the deformation of the first body 300 and the second body 400, and reduce the probability of the whole machine getting stuck when opening and closing after falling, thereby avoiding affecting the opening and closing experience of the whole machine. In addition, the reduction in the deformation of the whole machine when it falls reduces the degree of squeezing of the main screen, thereby reducing the probability of failure of the main screen. At the same time, since the present application can alleviate the deformation and bulging of the hinge cover 100, this can avoid affecting the appearance and performance of the whole machine.

[0060] The electronic devices disclosed in the embodiments of the present application may be mobile phones, tablet computers, e-book readers, wearable devices (such as smart watches), game consoles, etc. The embodiments of the present application do not limit the specific types of electronic devices.

[0061] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A hinge assembly comprising a hinge cover and a hinge bracket, The hinge cover is provided with a mounting groove, and the mounting groove has a first side wall extending along the width direction of the hinge cover; A mating portion is provided on the hinge bracket, and the mating portion is located in the mounting groove. The mating portion includes a first end face extending along the width direction of the hinge bracket, the first side wall is gap-fitted with the first end face, and the distance between the first side wall and the first end face is less than a first preset value.

2. The hinge assembly according to claim 1, wherein: The hinge cover is provided with a connecting hole spaced apart from the mounting groove, the hinge bracket is provided with a connecting piece, the connecting piece is matched with the connecting hole, and the matching clearance between the connecting piece and the connecting hole is the first preset value; A positioning column is protruding from the mounting groove, and a positioning hole is opened on the matching portion. The positioning column is positioned and matched with the positioning hole. The matching clearance between the positioning column and the positioning hole is a second preset value, and the distance between the first side wall and the first end face is greater than the second preset value.

3. The hinge assembly according to claim 2, wherein: The connecting hole is arranged close to the outer side wall of the hinge cover, and the distance between the first end surface and the outer side wall is a first distance, and the distance between the center of the connecting hole and the outer side wall is a second distance, and the first distance is smaller than the second distance.

4. The hinge assembly according to claim 2, wherein: The connection holes include a first connection hole and a second connection hole, the first connection hole and the second connection hole are arranged at intervals along the width direction of the hinge cover, and the first side wall is located between the first connection hole and the second connection hole.

5. The hinge assembly according to claim 2, wherein: The connecting holes include a first connecting hole and a second connecting hole, the first connecting hole and the second connecting hole are arranged at intervals along the width direction of the hinge cover, the matching portion includes a first surrounding surface and a second surrounding surface, the first surrounding surface surrounds the first connecting hole, the second surrounding surface surrounds the second connecting hole, and a portion of the first surrounding surface and a portion of the second surrounding surface are both located between the first connecting hole and the second connecting hole; The first side wall is located on a side of the first end surface facing away from the first surrounding surface and the second surrounding surface.

6. The hinge assembly according to claim 5, wherein: Two edges of the hinge bracket opposite to each other along its width direction are respectively a first edge and a second edge. One end of the first end surface extends to the first edge, and the other end of the first end surface extends to the second edge.

7. The hinge assembly according to claim 2, wherein: The connecting piece is a connecting column protruding from the hinge bracket, and the connecting column is plug-fitted into the connecting hole and is bonded together.

8. The hinge assembly according to claim 7, wherein: The hinge bracket has a first adhesive surface, which is arranged around the connecting column. The hinge cover has a second adhesive surface, which is arranged around the connecting hole. The first adhesive surface and the second adhesive surface are adhesively connected.

9. The hinge assembly according to claim 1, wherein: The matching portion has a first surface, the first surface faces the hinge cover along the thickness direction of the hinge cover, and a buffer recess is formed on the first surface.

10. The hinge assembly according to claim 9, wherein: The buffer recess is arranged close to the first end surface.

11. The hinge assembly according to claim 1, wherein The number of the first side walls is at least two, and the at least two first side walls are spaced apart along the length direction of the hinge cover. The number of the matching parts is at least two, and each matching part is provided with the first end face. Each first side wall corresponds to each first end face one by one, and is clearance-fitted.

12. An electronic device comprising a first body, a second body and a hinge assembly according to any one of claims 1 to 11, wherein the first body and the second body are rotatably connected via the hinge assembly, and during the mutual rotation of the first body and the second body, the electronic device switches between an unfolded state and a folded state.

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