CN212435742U

CN212435742U - Assembly structure and terminal equipment

Info

Publication number: CN212435742U
Application number: CN202021394027.0U
Authority: CN
Inventors: 王金海
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-01-29
Anticipated expiration: 2030-07-15

Abstract

The disclosure relates to the technical field of electronic equipment, and particularly provides an assembly structure and terminal equipment. The frame and the supporting piece are connected in a matched mode through a connecting portion, and the connecting portion comprises an assembling groove and a protruding portion matched with the assembling groove in shape; the bulge with be equipped with protruding structure between the wall of assembly recess butt complex both sides, so that the bulge with when the assembly recess cooperation is connected, form between the wall of both sides and hold gluey space. The assembly structure of this disclosure improves the bonding strength of frame and support piece, improves assembly stability.

Description

Assembly structure and terminal equipment

Technical Field

The disclosure relates to the technical field of electronic equipment, in particular to an assembly structure and terminal equipment.

Background

In intelligent terminal, the apron subassembly of equipment can generally utilize the transition piece to support the assembly, for example along with electronic equipment's development, more and more intelligent equipment passes through the screen and realizes human-computer interaction, and comprehensive screen can provide better impression and interactive experience, therefore the design of the more and more comprehensive screen of adoption of intelligent equipment. Because the dispensing area of the screen assembly of the full-screen equipment is small, in order to realize stable assembly, the screen assembly is arranged on the middle frame of the equipment by taking the screen supporting structure as a transition piece in some equipment. In the related art, the middle frame and the supporting structure of the equipment are assembled by bonding with glue, but the bonding strength is low, so that the problem of glue failure and falling is easily caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that the bonding strength between a screen supporting structure and an equipment middle frame is poor, the disclosed embodiment provides an assembling structure and terminal equipment.

In a first aspect, the disclosed embodiments provide an assembly structure for a terminal device,

the frame and the supporting piece are connected in a matched mode through a connecting portion, and the connecting portion comprises an assembling groove and a protruding portion matched with the assembling groove in shape; the bulge with be equipped with protruding structure between the wall of assembly recess butt complex both sides, so that the bulge with when the assembly recess cooperation is connected, form between the wall of both sides and hold gluey space.

In some embodiments, the assembly groove is disposed around the rim; the protruding part comprises a first area and a second area along the surrounding direction, and the protruding structure is arranged in one of the first area and the second area.

In some embodiments, the supporting element is an annular structure, the annular structure includes a plurality of straight edge portions and a bending portion for connecting two adjacent straight edge portions, the straight edge portions form the first region, the bending portion forms the second region, and the protruding structure is disposed in the first region.

In some embodiments, the protruding structure includes a plurality of support ribs disposed on the side wall of the protruding portion, and the support ribs abut against the side wall of the fitting groove when the protruding portion is fittingly connected with the fitting groove.

In some embodiments, the protruding structure includes a plurality of support ribs provided on the side walls of the fitting groove, and the support ribs abut against the side walls of the protruding portion when the protruding portion is fitted into the fitting groove.

In some embodiments, the plurality of support ribs are sequentially and evenly spaced in a direction around the frame.

In some embodiments, the connecting portion includes the fitting groove opened on one side end surface of the bezel, and the protrusion formed on one side end surface of the support member; or

The connecting part comprises an assembling groove arranged on one side end face of the supporting part and a protruding part formed on one side end face of the frame.

In some embodiments, when the supporting member is connected to the frame in a fitting manner, the protruding portion is bonded to the fitting groove by glue, and the glue containing space is used for containing the glue.

In a second aspect, the present disclosure provides a terminal device, including:

according to the assembling structure of any one of the embodiments of the first aspect, an assembling position is provided on an end surface of the supporting member, which is away from the side frame, and the assembling position is suitable for fixedly assembling a cover plate assembly of the terminal device.

In some embodiments, the cover assembly comprises a screen assembly or a back plate assembly.

The assembly structure of the embodiment of the disclosure is used for a terminal device and comprises a frame and a support piece, wherein the frame and the support piece are connected in a matched mode through a connecting portion, the connecting portion comprises an assembly groove and a protruding portion, and a protruding structure is arranged between the protruding portion and two side walls of the butt fit of the assembly groove, so that when the protruding portion is connected with the assembly groove in an assembled mode, a glue containing space is formed between the side wall of the protruding portion and the side portion of the assembly groove. Guarantee bulge and the original fit-up gap of assembly recess through setting up protruding structure, avoid taking place the skew after the screen assembly, guarantee the assembly straightness accuracy to glue the space through holding, utilize to hold gluey space increase bonding strength between them, avoid opening gluey, improve assembly stability.

According to the assembling structure of the embodiment of the disclosure, the assembling groove is arranged around the frame in a circle, the protruding part comprises a first area and a second area along the surrounding direction, and the protruding structure is arranged in one of the first area and the second area. That is, one of the first area and the second area is provided with the protruding structure, and the other area is not provided with the protruding structure, so that the matching clearance of the area without the protruding structure is increased, when the supporting piece is assembled with the frame, the deformation of the supporting piece caused by matching tolerance can be eliminated in the area, the bonding strength is improved, meanwhile, the matching stress is further reduced, and the assembling stability is further improved.

This assembly structure of embodiment of disclosure, the distance between the lateral wall of bulge and the lateral wall of assembly recess is 0.1mm ~ 0.15mm to glue the space through the appearance more than 0.1mm that forms between the two, improve bonding strength greatly, guarantee assembly stability. The butt joint clearance of the supporting rib and the side wall of the assembling groove is 0-0.05 mm, so that the original assembling clearance of the protruding part and the assembling groove is ensured through the supporting rib, the deviation after the screen is assembled is avoided, and the assembling straightness is ensured.

The terminal device of the embodiment of the disclosure comprises the assembly structure, so that all technical effects are achieved, the support piece is further provided with an assembly position, and the assembly position is used for fixedly assembling a screen assembly or a back plate assembly of the terminal device, namely the assembly structure can be used for assembling a screen, and can also be used for assembling a back plate, and the overall assembly stability of the device is improved.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of an assembly structure of a screen transition piece and a middle frame of a smart phone in the related art.

Fig. 2 is a sectional view showing an assembly structure of a screen transition piece and a middle frame in the related art.

Fig. 3 is a schematic view of an upper end surface structure of a screen support according to some embodiments of the present disclosure.

Fig. 4 is a schematic view of a lower end surface structure of a screen support according to some embodiments of the present disclosure.

Fig. 5 is an enlarged view of the area a in fig. 4.

Fig. 6 is a cross-sectional view of a screen mounting structure according to some embodiments of the present disclosure.

Figure 7 is an enlarged partial view of a bend in some embodiments according to the present disclosure.

Description of reference numerals:

10-middle frame; 11-groove; 20-a transition piece; 21-bulge; 30-screen; 100-frame; 110-fitting grooves; 200-a support; 210-an assembly position; 220-a projection; 221-supporting ribs; 231-straight side portion; 232-bending part; 300-screen assembly.

Detailed Description

The technical solutions of the present disclosure will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure. In addition, technical features involved in different embodiments of the present disclosure described below may be combined with each other as long as they do not conflict with each other.

In intelligent terminal devices, the cover plate assembly of the device is often supported and assembled by using a transition piece. Taking the assembly of screen subassembly as an example, nowadays, more and more smart machine realize man-machine interaction through the touch-sensitive screen, and comprehensive screen can provide better impression and interactive experience, therefore more and more equipment pursues the design of full screen, for example smart mobile phone, intelligent wrist-watch etc.. The front face of the full-screen equipment is almost completely a screen assembly, so that the bonding area is small when the full-screen equipment is glued and bonded with the frame of the equipment, and in order to realize stable assembly of the screen assembly, in some equipment, the screen assembly is assembled by using a screen supporting piece as a transition piece.

For example, fig. 1 shows an assembly structure of a smartphone in the related art. As shown in fig. 1, one side end face of the middle frame 10 of the mobile phone is connected with a back plate of the mobile phone to form a housing of the mobile phone, and electronic devices related to the mobile phone, such as a processor, a sensor, etc., are disposed inside the housing.

The upper end surface of the middle frame 10 is provided with a transition piece 20 for supporting the screen assembly, the transition piece 20 is bonded with the upper end surface of the middle frame 10 by glue dispensing, and the upper end surface of the transition piece 20 provides a mounting position of the screen assembly, so that the screen assembly is bonded on the transition piece 20 by means of glue dispensing, for example. The assembled cross-sectional structure of the middle frame 10, the transition piece 20, and the screen 30 is shown in fig. 2.

Referring to fig. 2, a groove 11 is formed on an end surface of the middle frame 10, and a protrusion 21 is formed on the transition piece 20 to be matched with the groove 11 in shape, so that the protrusion 21 is matched and connected with the groove 11 when the middle frame 10 is assembled with the transition piece 20. The space between the bottom wall of the protrusion 21 and the bottom wall of the groove 11 is used for applying glue, thereby achieving the adhesion of the two. However, the assembly structure shown in fig. 2 is very prone to glue overflow in practical use, which results in low bonding strength between the transition piece 20 and the middle frame 10, and glue failure during testing and practical use.

The inventor discovers, through a large number of experimental comparison studies, that the reason for causing the stripping and falling of the assembling structure in the related technology is mainly as follows:

1) as shown in FIG. 2, the fitting distance between the side wall of the projection 21 and the side wall of the groove 11 is very small, generally h₁About 0.05mm, which is to ensure that the assembled screen is tightly assembled and thus has good straightness. However, the glue accommodating space formed by the assembling clearance is very small, and glue overflow is easily generated through the assembling clearance between the two side walls in the pressure maintaining stage, so that the bonding strength of the glue is reduced.

2) Due to the error problem of the injection tolerance, the assembly gap between the protrusion 21 and the side wall of the groove 11 may be further reduced, so that a large assembly stress is generated after assembly, the bonding strength of glue is greatly reduced, and phenomena such as glue failure and the like are caused.

Based on the defects in the related art, the embodiments of the present disclosure provide an assembly structure, which may be used for a terminal device, for example, to achieve fixed assembly of a screen support and a bezel.

In some embodiments, the assembling structure includes a frame and a supporting member disposed on an end surface of one side of the frame, the frame and the supporting member are cooperatively connected by a connecting portion, and the connecting portion includes an assembling groove disposed on one of the frame and the supporting member and a protrusion disposed on the other of the frame and the supporting member and having a shape matching with the assembling groove. A plurality of convex structures are arranged on the two side walls of the convex part at intervals in sequence; for another example, a plurality of convex structures are sequentially arranged on the inner side wall of the assembly groove at intervals; and the like. The convex structure is used for being abutted between the two side walls when the protruding part is matched with the assembling groove, so that a glue containing space can be formed in a non-convex structure area between the side wall of the protruding part and the side wall of the assembling groove.

According to the screen assembling device, the protruding structures on the protruding portions are in butt fit with the side walls of the assembling grooves, so that the original assembling gaps are guaranteed, and the assembling of the screen is guaranteed to have good straightness. Simultaneously, the glue containing space is formed in the non-protruding structure area between the side wall of the protruding portion and the side wall of the assembling groove, so that the glue containing space between the two side walls is increased, the bonding strength is improved, glue is prevented from being broken, and the stability of the assembling structure is improved.

To further illustrate the mounting structure of the disclosed embodiments, one specific embodiment of the support member and mounting structure is shown in fig. 3-7. In this embodiment, the terminal device will be described by taking a smartphone as an example.

In a smart phone, the front surface of a general mobile phone is a screen assembly which is approximately rectangular (rounded rectangle), and the peripheral side surface is a frame, that is, the frame is a rectangular ring structure surrounding one circle. And the screen supporting piece is arranged on the rectangular annular end face of the frame, and then the screen assembly is assembled on the screen supporting piece.

As shown in fig. 3, in the present embodiment, the supporting member 200 is a closed rounded rectangular ring structure that is matched with the shape of the frame. For convenience of understanding, hereinafter, a side close to the screen assembly is defined as "upper", a side close to the bezel is defined as "lower", four straight sides of the rounded rectangle of the support 200 are defined as "straight sides 231", and four corner corners are defined as "bent portions 232".

The structure of the upper end surface of the supporter 200 is shown in fig. 3, and in this embodiment, since the upper end surface of the supporter 200 is used for assembling with the screen assembly, an assembling site 210 is provided on the upper end surface of the supporter 200, and the assembling site 210 is, for example, an assembling step, so that the edge of the cover plate of the screen assembly can be supported and adhered on the assembling step. Of course, the assembly site 210 may be other suitable structures, such as a plurality of assembly bone sites, and the like, and the present disclosure is not limited thereto.

Fig. 4 and 5 show the structure of the lower end face of the screen support. As shown in fig. 5, a protrusion 220 is disposed on the lower end surface of the supporting member 200, the protrusion 220 is a protrusion structure surrounding the supporting member 200, and the cross-sectional shape of the protrusion 220 is matched with the cross-sectional shape of the assembling groove on the frame.

With continued reference to fig. 5, on both side walls of the protruding portion 220, a plurality of protruding convex structures are provided, in this embodiment, the convex structures are a plurality of support ribs 221, and the plurality of support ribs 221 are sequentially and uniformly spaced in the length direction of the protruding portion 220. When the protruding portion 220 is matched with the assembling groove on the frame, the supporting ribs 221 are abutted on the side walls of the assembling groove, so that a glue accommodating space can be formed between two adjacent supporting ribs 221.

A cross-sectional view of a screen mounting structure in an embodiment of the present disclosure is shown in fig. 6. As shown in fig. 6, in the present embodiment, the assembly structure includes a bezel 100, a support member 200, and a screen assembly 300. The upper end face of the frame 100 is provided with an assembly groove 110, and the assembly groove 110 is a surrounding edgeAn annular groove around the circumference of the frame 100. As shown in fig. 6, when the supporting member 200 is assembled with the frame 100, the supporting ribs 221 on the two side walls of the protruding portion 220 are abutted and matched with the side walls of the assembling groove 110, and the matching gap between the two is the assembling gap h₁. For example, in one example, the fitting gap between the support rib 221 and the sidewall of the fitting groove 110 is preferably 0mm to 0.05mm, and more preferably 0.05mm, so that the original fitting requirement of the screen assembly can be ensured by the fitting of the support rib 221 and the sidewall of the fitting groove 110, and the linearity requirement of the screen assembly can be ensured.

After the support member 200 is assembled with the bezel 100, a gap between the sidewall of the protrusion 200 and the sidewall of the assembly groove 110 is h₂. As can be seen from the above, the support rib 221 is in abutting engagement with the side wall of the mounting groove 110, i.e. the engagement gap between the two is h₁Thus h₂Must be greater than h₁. That is, in the embodiment of the present disclosure, the glue accommodating space formed by the non-support rib 221 region between the side wall of the protrusion 200 and the side wall of the mounting groove 110 is larger than the mounting gap space in the related art of fig. 2.

For example, in some embodiments, the gap h between the side wall of the projection 200 and the side wall of the fitting groove 110₂Preferably 0.1mm to 0.15mm, which is much larger than 0.05mm in the related art of fig. 2. The bigger glue containing space can avoid the overflow glue generated by the assembly structure through the assembly gaps on the two sides, and improve the bonding strength of the equipment.

In addition, it should be noted that, for devices such as smart phones and smart watches, hot melt adhesives made of polyurethane are generally used for bonding. Through a large number of comparative experiments, the inventor finds that when the assembly gap between the two assembly parts is more than 0.1mm, the adhesive property of the glue can be fully exerted, and therefore the adhesive strength is higher.

Therefore, in the embodiment of the present disclosure, the bonding surface is not limited to the bottom wall of the protrusion 220 and the bottom wall of the fitting groove 110, but the side walls may be used as the bonding surface, and since the glue accommodating space between the side walls is increased, the bonding strength may be further increased. Thereby compared with the assembly structure in the related art, the time of the assembly pressure maintaining stage can be greatly shortened.

The pressure maintaining means that the two bonding pieces are pressed and clamped by a special tool clamp before glue solidification, so that the consistency of the relative positions, the fit clearance and the glue layer thickness of the two bonding pieces after the glue solidification is ensured.

Proved by experiments, the assembling structure of the embodiment can shorten the pressure maintaining time from original 4 hours to 1min, greatly improves the generation efficiency of a production line of equipment, saves a large amount of pressure maintaining jigs during project development, saves a large amount of cost, is more favorable for shortening the product development period in the earlier stage, and ensures the shipment volume.

As shown in fig. 6, in the present embodiment, it can be seen that the cross-section of the fitting groove 110 and the projection 220 is in the shape of an isosceles trapezoid. That is, the distance between the two sidewalls of the assembly groove 110 is gradually increased in the direction from the bottom of the groove to the opening, and the protrusion 220 is correspondingly disposed, so that the assembly of the screen supporter and the bezel 100 can be more conveniently performed, and the assembly efficiency can be improved.

As can be seen from the above, at least one inventive concept of the embodiments of the present disclosure is: through set up protruding structure between assembly groove and bulge lateral wall, utilize protruding structure to guarantee the assembly clearance requirement promptly, increase again and hold gluey space and improve bonding strength. Therefore, the embodiments of the present disclosure are not limited to the above-described embodiments under the inventive concept.

For example, in another embodiment, the connecting portion includes the assembling groove 110 opened on the supporting member 200 and the protrusion 220 formed on the bezel 100, i.e., the relative positions of the assembling groove 110 and the protrusion 220 are not necessarily limited.

For example, in another embodiment, the protruding structure may be any other protruding structure suitable for implementation, such as a strip-shaped protruding structure, a ball-shaped protruding structure, or the like, besides the supporting rib 221. The distribution of the protruding structures on the protruding portion 220 may also be any other suitable implementation manner, such as a vertical spacing arrangement, a horizontal lateral spacing arrangement, an inclined distribution arrangement, and the like, which is not limited by the present disclosure. And the protrusion structure may be formed on the protrusion 220, the assembly groove 110, or be disposed between the two sidewalls as a separate structure, which is not limited in this disclosure.

For the above embodiment examples, those skilled in the art may understand and implement them specifically on the basis of the foregoing disclosure without any doubt, and this disclosure will not be enumerated or repeated here.

Furthermore, in consideration of the error of the injection molding tolerance of the screen support, a large assembly stress is generated after the support 200 and the frame 100 are assembled, and the assembly stress affects the bonding structure of the support and the frame, which easily causes the problem of glue failure and falling off. To further address this issue, an embodiment of a screen support is shown in FIG. 7.

As shown in fig. 7, in the present embodiment, the supporting member 200 has a rounded rectangular structure, so that a straight portion 231 is formed at four straight edge regions, and a bending portion 232 is formed at a corner region connecting two adjacent straight edges. In the present embodiment, the support ribs 221 on the protruding portion 220 are only provided on the straight edge portions 231, that is, the support ribs 221 are only provided on the protruding portion 220 in the regions of the four straight edge portions 231, and the support ribs 221 are not provided on the protruding portion 220 in the regions of the four bent portions 232.

This is because the fitting stress is maximized at the four corner regions, i.e., the stress generated at the four bent portions 232, when the annular protrusion 220 is adhesively fitted to the annular fitting groove 110. Therefore, in the present embodiment, the support rib 221 is not provided in the four bent portions 232, that is, the assembling clearance at the position of the bent portion 232 is increased to h₂. Therefore, the assembly deformation generated by the four straight edge parts 231 is eliminated by the four bending parts 232, so that the minimum assembly stress of the support member 200 and the frame 100 can be ensured, the maximum bonding area and bonding strength of the support member and the frame can be ensured, and the risk of adhesive failure is further reduced.

It is to be understood that at least one inventive concept of the disclosed embodiments resides in: and no convex structure is arranged in the partial area where the convex part is matched with the assembling groove, so that the assembling clearance of the area is increased, and the area is utilized to eliminate the assembling stress of the support and the frame. Therefore, in light of the above-described inventive concept, those skilled in the art will appreciate that the disclosed embodiments are not limited to the embodiment shown in fig. 7, but may be implemented in any other suitable manner.

For example, in one example, the support members need not be configured as a closed loop structure, such as a straight strip structure, so that the four sides of the bezel are respectively assembled by using 4 straight strip support members. For each straight strip-shaped support piece, the straight strip-shaped support piece comprises a first area and a second area, and the protruding structures are only arranged on the protruding parts of the first area. And the convex part of the second area is not provided with a convex structure, so that the assembly gap between the convex part of the second area and the assembly groove is increased, and the second area is utilized to eliminate the assembly stress of the first area. For example, the second areas are two ends of a straight strip, and the first area is a middle of the straight strip, so that the second areas at the two ends are used for eliminating the assembly stress of the first area in the middle.

Of course, it should be understood by those skilled in the art that the disclosed embodiments are not limited to the above examples, which are not enumerated by the present disclosure.

The rework of the assembly structure means that the screen assembly can be disassembled during the equipment repair process, but the disassembly process needs to ensure that only the screen assembly 300 is disassembled, and the screen support cannot be brought up. Proved by a large number of experiments, the assembly structure of the embodiment can not cause the situation that the screen supporting piece and the frame 100 are glued during the roller experiment, the drop experiment or the heavy work process, and has ideal bonding effect.

While the assembly structure in the embodiments of the present disclosure has been described in detail above, other alternative embodiments may be made to the present disclosure in addition to the above embodiments.

In an alternative embodiment, the screen support and the screen mounting structure are not limited to a smart phone, but may be any other device with a screen suitable for implementation, such as a smart watch, a smart bracelet, and the like, which is not limited by the present disclosure.

In another alternative embodiment, the shape of the device is not limited to a rounded rectangle, but may be any other shape suitable for implementation, such as a circle, polygon, or other non-closed shape. It should be noted that, for the screen support with the polygonal structure, a bending portion may also be disposed at the connection region of two adjacent straight edges to relieve the assembling stress, and it should be understood by those skilled in the art that the details are not described herein.

In yet another alternative embodiment, the support member is not limited to be used for assembling the screen and the bezel, but is also suitable for assembling any other cover plate assembly, such as the assembly of the back plate assembly and the bezel of the mobile phone, and the disclosure does not limit the assembly.

The embodiment of the present disclosure further provides a terminal device, where the terminal device includes the assembly structure in any one of the above embodiments, and a person skilled in the art can implement the assembly structure with reference to the foregoing embodiment, which is not described herein again.

In some embodiments, the terminal device according to the embodiments of the present disclosure may be any device suitable for the above-described assembly structure, for example, a smart phone, a smart watch, a smart bracelet, a tablet computer, and the like, which is not limited by the present disclosure.

According to the screen assembling device, the protruding structures on the protruding portions are in butt fit with the side walls of the assembling grooves, so that the original assembling gaps are guaranteed, and the assembling of the screen is guaranteed to have good straightness. Meanwhile, a glue containing space is formed in the area of the non-protruding structure between the side wall of the protruding portion and the side wall of the assembling groove, so that the glue containing space between the two side walls is enlarged, the bonding performance of glue is fully exerted, the bonding strength is increased, glue is prevented from being broken, and the stability of the assembling structure is improved.

Proved by experiments, the assembling structure of the embodiment can shorten the pressure maintaining time from original 4 hours to 1min, greatly improves the generation efficiency of a production line of equipment, saves a large amount of pressure maintaining jigs during project development, saves a large amount of cost, is more favorable for shortening the product development period in the earlier stage, and ensures the shipment volume. And no matter be the cylinder experiment, still fall the experiment, perhaps heavily do not appear the condition that screen support piece and frame are glued, have ideal bonding effect.

It should be understood that the above embodiments are only examples for clearly illustrating the present invention, and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the present disclosure may be made without departing from the scope of the present disclosure.

Claims

1. An assembly structure for a terminal device, characterized in that,

2. The fitting structure according to claim 1,

the assembling groove is arranged around the frame in a circle; the protruding part comprises a first area and a second area along the surrounding direction, and the protruding structure is arranged in one of the first area and the second area.

3. The fitting structure according to claim 2,

the supporting piece is of an annular structure, the annular structure comprises a plurality of straight edge parts and a bending part used for connecting two adjacent straight edge parts, the straight edge parts form the first area, the bending part forms the second area, and the protruding structure is arranged in the first area.

4. The fitting structure according to claim 1,

the protruding structure comprises a plurality of supporting ribs arranged on the side wall of the protruding portion, and when the protruding portion is connected with the assembling groove in a matched mode, the supporting ribs are abutted to the side wall of the assembling groove.

5. The fitting structure according to claim 1,

the protruding structure comprises a plurality of support ribs arranged on the side wall of the assembling groove, and when the protruding portion is connected with the assembling groove in a matched mode, the support ribs are abutted to the side wall of the protruding portion.

6. The fitting structure according to claim 4 or 5,

the supporting ribs are arranged along the direction surrounding the frame in a circle at regular intervals.

7. The fitting structure according to claim 1,

the connecting part comprises the assembling groove arranged on one side end face of the frame and the protruding part formed on one side end face of the supporting part; or

8. The fitting structure according to claim 1,

when the supporting piece is connected with the frame in a matched mode, the protruding portion is bonded with the assembling groove through glue, and the glue containing space is used for containing the glue.

9. A terminal device, comprising:

the fitting structure according to any one of claims 1 to 8, wherein an end surface of the support member facing away from the rim is provided with a fitting position adapted to fixedly fit a cover plate assembly of the terminal device.

10. The terminal device of claim 9,

the cover plate assembly comprises a screen assembly or a back plate assembly.