Rotating shaft decorating part of folding screen mobile phone and manufacturing method of rotating shaft decorating part

Abstract

The invention relates to the technical field of manufacturing of micro parts of electronic equipment, in particular to a rotating shaft decorating part of a folding screen mobile phone and a preparation method of the rotating shaft decorating part. The rotating shaft decorating part comprises a metal connecting part, an injection molding part and a metal plate, and the metal connecting part comprises a first end extending in the vertical direction and a second end extending from the bottom of the first end in the transverse direction; the second end comprises a first side face and a second side face which are oppositely arranged in the vertical direction. The injection molding part comprises a wrapping part wrapping the first end, an extension part attached to the first side face and a reinforced connecting part extending in the vertical direction. The extension part is connected with the wrapping part, and the reinforced connecting part is connected with the extension part; the metal plate adheres to the second side face and the reinforcing connecting part and is welded to the second end. On one hand, the connecting strength of the injection-molded part and the metal connecting part is enhanced, the probability that the injection-molded part is separated from the metal connecting part is reduced, on the other hand, the connecting strength of the injection-molded part and the metal part is also enhanced, and the probability that the injection-molded part is separated is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of manufacturing micro-parts for electronic devices, and specifically to a hinge decoration for a folding screen mobile phone and a manufacturing method thereof. Background Art

[0002] The decorative parts of the hinge of a foldable phone are important components of the phone. Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 and Figure 3 This is a schematic diagram of a foldable screen mobile phone. Figure 2 The figure is a schematic diagram of the folding state of the folding screen mobile phone. The decorative part includes a metal seat 101 and a soft non-metallic metal connector 102. When the rotating shaft is installed, the metal seat 101 is connected to the two flip bodies 100 through the non-metallic metal connector 102, so that the metal seat 101 is aligned with the end of the rotating shaft 200, and the metal seat 101 closes the end of the rotating shaft 200, which plays the role of decorating and hiding the end of the rotating shaft 200, making the whole machine look more beautiful.

[0003] Due to the characteristics of the decorative part, it is a thin-walled part with high dimensional accuracy and appearance requirements. When manufacturing the decorative part, a common technique is to put the metal seat 101 into a mold and attach the non-metallic connector 102 to the inner surface of the metal seat 101 by in-mold injection molding.

[0004] The following defects will occur when the decorative parts are manufactured using the above method: 1. During the in-mold injection molding process, due to the high pressure when the mold is closed, it is easy to crush the outer surface of the metal seat 101, forming defects, affecting the appearance of the decorative parts, and then affecting the overall appearance of the mobile phone. 2. The high pressure of the mold closing can also easily squeeze the metal seat 101, causing it to deform and become unsuitable for subsequent high-precision assembly processes, ultimately resulting in the scrapping of the parts. 3. The size of the metal seat 101 is small, resulting in a small bonding area with the non-metallic connector 102. The metal seat 101 and the non-metallic connector 102 are connected only by the adhesion formed during the injection molding process. The connection strength between the two is low, which can easily cause the metal seat 101 to fall off during daily use of the mobile phone.

[0005] In addition, when the existing metal seat 101 and the non-metallic connector 102 are fixed, there is also a method of fixing them by connecting the two with an intermediate metal connector, such as one end of the intermediate metal connector is connected to the metal seat 101 by welding, and the other end is injection molded with the non-metallic connector 102. In this prior art, the non-metallic connector 102 is not directly connected to the metal seat 101, and it uses the intermediate metal connector as a connecting medium to connect the metal seat 101. Although this solution improves the connection strength between the non-metallic connector 102 and the metal seat 101 to a certain extent, during the long-term use of the mobile phone, as the number of folding increases, the non-metallic connector 102 is pulled for a long time, and there is still a high probability that it will be detached from the intermediate metal connector, thereby causing the non-metallic connector 102 to be detached from the metal seat 101.

[0006] Therefore, how to further improve the connection strength between the non-metallic connector 102 and the metal base 101 while ensuring the appearance quality of the metal base 101 is a technical problem that the industry needs to solve. Summary of the invention

[0007] The purpose of the present invention is to propose a hinge decoration for a folding screen mobile phone and a manufacturing method thereof, and to study how to further improve the connection strength between the injection molded part and the metal plate, reduce the probability of connection failure, and not damage the appearance of the metal plate.

[0008] To achieve the above object, the present invention provides a hinge decoration for a folding screen mobile phone, which includes:

[0009] A metal connector, the metal connector comprising a first end extending vertically and a second end extending laterally from a bottom of the first end; the second end comprising a first side surface and a second side surface arranged opposite to each other in the vertical direction;

[0010] An injection molded part, the injection molded part comprising a wrapping portion wrapped around the first end, an elongated portion attached to the first side surface, and a reinforced connecting portion extending vertically; the elongated portion is connected to the wrapping portion, and the reinforced connecting portion is connected to the elongated portion; and

[0011] A metal plate is bonded to the second side surface and the reinforced connection portion and is welded to the second end.

[0012] Preferably, the second end is provided with an avoidance hole which vertically penetrates the first side surface and the second side surface; and the reinforced connection portion comprises a first reinforced connection portion which penetrates the avoidance hole and is bonded to the metal plate.

[0013] Preferably, the cross-sectional area of ​​the end portion of the avoidance hole close to the first side surface is smaller than the cross-sectional area of ​​the end portion of the avoidance hole close to the second side surface; the first reinforced connection portion includes an interpenetrating section adapted to the shape of the avoidance hole and a skirt plate expanding radially outward from the end of the interpenetrating section along the interpenetrating section, and the skirt plate is clamped in the corresponding port of the avoidance hole; the skirt plate is bonded to the metal plate.

[0014] Preferably, a sink is provided at the edge of the port of the avoidance hole close to the second side surface, and the shape of the sink matches the shape of the skirt plate.

[0015] Preferably, the reinforced connection portion comprises a second reinforced connection portion opposite to the second end edge; the second reinforced connection portion is bonded to the metal plate.

[0016] A method for manufacturing a rotating shaft decoration of a folding screen mobile phone comprises the following steps:

[0017] S1. Prepare a metal plate and a metal connector respectively, wherein the metal connector includes a first end extending vertically and a second end extending laterally from the bottom of the first end, and the second end includes a first side surface and a second side surface arranged opposite to each other in the vertical direction;

[0018] S2. The injection molded part is disposed on the metal connector by injection molding, so that the injection molded part forms a wrapping portion wrapped around the first end, an elongated portion attached to the first side, and a reinforced connecting portion extending vertically, the elongated portion is connected to the wrapping portion, and the reinforced connecting portion is connected to the elongated portion;

[0019] S3. The side of the enhanced connecting portion facing away from the elongated portion is bonded to the metal plate; the second side is pre-fixed to the metal plate by bonding;

[0020] S4. Weld the second end to the metal connecting piece to obtain a rotating shaft decorative piece.

[0021] Preferably, step S3 comprises:

[0022] S31. Apply glue to the connection surface of the metal plate to form multiple glue spots on the connection surface;

[0023] S32. Press the second end and the extension portion toward the connection surface of the metal plate simultaneously, so that the side of the reinforced connection portion facing away from the extension portion and the second side surface of the metal connector are synchronously extruded and bonded to the corresponding glue spot.

[0024] Preferably, in step S1, the process of preparing the metal connector includes: providing a metal substrate plate, punching out a plurality of metal connectors and a connecting plate from the metal substrate plate by punching, wherein the end surface of the second end of each metal connector is fixedly connected to the connecting plate;

[0025] In step S2, the process of setting the injection molded parts on the metal connector by injection molding includes: placing each metal connector into a mold cavity respectively, performing injection molding, and completing the process of setting the injection molded parts on the metal connector; then using punching to cut the multiple metal connectors from the connecting plate.

[0026] Preferably, the second end of the metal connector is provided with an avoidance hole penetrating the first side surface and the second side surface; the reinforced connection portion comprises a first reinforced connection portion and a second reinforced connection portion, the first reinforced connection portion is convexly arranged on a side of the elongated portion facing the first side surface, and is inserted into the avoidance hole; the second reinforced connection portion is opposite to the edge of the second end;

[0027] In step S1, the process of bonding the side of the reinforcing connection part facing away from the elongated part to the metal part includes: bonding and fixing the end of the first reinforcing connection part away from the elongated part to the metal part;

[0028] In step S3, the process of bonding the side of the reinforcing connection part facing away from the elongated part to the metal plate includes: bonding and fixing the side of the second reinforcing connection part facing away from the elongated part to the metal plate.

[0029] Preferably, in step S3, before welding, a clamp is first used to continuously press the metal connector and the injection molded part onto the metal plate, so that glue is continuously squeezed on the second side surface, the end of the first reinforced connection part away from the extension part, and the side of the second reinforced connection part facing away from the extension part.

[0030] The present invention has the following beneficial effects:

[0031] The injection molded part is fixedly connected to the metal connector by wrapping the first end of the metal connector segment with the wrapping portion, and then the second end of the metal connector is welded to the metal part, and the extension portion is attached to the second end of the metal connector, thereby increasing the connection strength between the injection molded part and the metal connector and reducing the probability of the injection molded part and the metal connector being separated. In addition, the injection molded part is also bonded to the metal plate by the reinforcing connection portion, thereby further strengthening the connection strength between the injection molded part and the metal part. Through the aforementioned method, on the one hand, the connection strength between the injection molded part and the metal connector is enhanced, reducing the probability of the injection molded part being separated from the metal connector, and on the other hand, the connection strength between the injection molded part and the metal part is also enhanced, reducing the probability of the injection molded part being separated.

[0032] In addition, the present invention also provides a method for manufacturing a hinge decoration of a folding screen mobile phone, which first fixes the injection molded part to the metal connector by injection molding, and then adheres the reinforcing connection part of the injection molded part to the metal plate, so that on the one hand, the injection molded part can be pre-positioned on the metal part, which is conducive to the subsequent accurate welding of the metal connector on the metal part, and on the other hand, the connection strength between the injection molded part and the metal plate can be improved. In addition, the second side of the metal connector is also pre-positioned on the metal plate by bonding, which is convenient for the subsequent accurate welding of the metal connector on the metal plate, improving the welding quality of the metal connector and the metal plate, thereby facilitating the improvement of the connection strength between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0034] Figure 1 It is a structural schematic diagram of a rotating shaft decoration in the prior art in an unfolded state when connected to a folding screen mobile phone;

[0035] Figure 2 It is a structural schematic diagram of a rotating shaft decoration in the prior art in a folded state when connected to a folding screen mobile phone;

[0036] Figure 3 It is a structural schematic diagram of another angle when the rotating shaft decoration in the prior art is connected to the folding screen mobile phone and is in an unfolded state;

[0037] Figure 4 An exploded view of the rotating shaft decoration of the present invention;

[0038] Figure 5 It is a schematic diagram of the structure of the injection molded part and the metal connecting part in the rotating shaft decorative part of the present invention;

[0039] Figure 6 It is a structural schematic diagram of the injection molded part and the metal connecting part in the rotating shaft decorative part of the present invention from another angle;

[0040] Figure 7 It is a structural schematic diagram of an injection molded part in a rotating shaft decorative part of the present invention;

[0041] Figure 8 It is a structural schematic diagram of the injection molded part in the rotating shaft decorative part of the present invention from another angle;

[0042] Fig. 9 It is a schematic diagram of the inner structure of the metal plate in the rotating shaft decoration of the present invention;

[0043] Fig.10 It is a schematic diagram of the outer structure of the metal plate in the rotating shaft decoration of the present invention;

[0044] Fig.11 It is a schematic diagram of welding of the metal connecting piece and the metal plate of the present invention.

[0045] In the accompanying drawings: 10-metal plate, 11-groove, 12-glue dispensing part, 20-metal connecting part, 21-first end, 211-casting hole, 22-second end, 221-avoidance hole, 222-wing plate, 223-notch, 224-sunk platform, 225-first side, 226-second side, 30-injection molded part, 31-wrapping part, 32-extension part, 321-first reinforced connecting part, 321a-interspersed section, 321b-skirt plate, 322-second reinforced connecting part, 33-connecting arm, 4-rotating shaft decorative part.

[0046] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0050] like Figures 4 to 11As shown, in this embodiment, the hinge decoration 4 of the folding screen mobile phone includes a metal connector 20, an injection molded part 30 and a metal plate 10. The injection molded part 30 of this embodiment is a part made of TPU material. Of course, in other embodiments, the injection molded part 30 can also be a part of other non-metallic materials that can be injection molded. The injection molded part 30 of this embodiment is connected to the two flip bodies of the folding screen mobile phone. The metal plate 10 is connected to the injection molded part 30 and is connected to the end of the hinge of the folding screen mobile phone. The connection method commonly used in the industry or selected based on experience can be adopted, such as snap-on, bonding or other connection methods, and the connection method is not limited here. As a decorative part, the metal plate 10 can play the role of hiding and closing the end of the hinge, making the folding screen mobile phone look neater and more beautiful.

[0051] Among them, the metal connector 20 includes a first end 21 extending vertically and a second end 22 extending laterally from the bottom of the first end 21; the second end 22 includes a first side surface 225 and a second side surface 226 arranged opposite to each other in the vertical direction. The injection molded part 30 includes a wrapping portion 31 wrapped around the first end 21, an elongated portion 32 attached to the first side surface 225, a reinforced connecting portion extending vertically, and two connecting arms 33. The two connecting arms 33 are respectively connected to the opposite sides of the wrapping portion 31, and the wrapping portion 31 is respectively connected to the two flip bodies of the folding screen mobile phone through the two connecting arms 33. The elongated portion 32 is connected to the wrapping portion 31, and the reinforced connecting portion is connected to the elongated portion 32. The metal plate 10 is bonded to the second side surface 226 and the reinforced connecting portion, and is welded to the second end 22.

[0052] Compared with the prior art, the injection molded part 30 of the present embodiment is fixedly connected to the metal connector 20 by wrapping the first end 21 of the metal connector section with the wrapping portion 31, and then the second end 22 of the metal connector 20 is welded to the metal part, and attached to the second end 22 of the metal connector 20 by the extension portion 32, thereby increasing the connection strength between the injection molded part 30 and the metal connector 20 and reducing the probability of the injection molded part 30 and the metal connector 20 being separated. In addition, the injection molded part 30 is also bonded to the metal plate 10 by the reinforced connection portion, thereby further strengthening the connection strength between the injection molded part 30 and the metal part. Through the aforementioned method, on the one hand, the connection strength between the injection molded part 30 and the metal connector 20 is enhanced, reducing the probability of the injection molded part 30 being separated from the metal connector 20, and on the other hand, the connection strength between the injection molded part 30 and the metal part is also enhanced, reducing the probability of the injection molded part 30 being separated.

[0053] In this embodiment, the second end 22 is provided with an avoidance hole 221 that vertically penetrates the first side surface 225 and the second side surface 226; the reinforced connection portion includes a first reinforced connection portion 321 that penetrates the avoidance hole 221 and is bonded to the metal plate 10. The first reinforced connection portion 321 is stuck in the avoidance hole 221, so that the attachment area of ​​the injection molded part 30 and the metal connector 20 can be increased, thereby facilitating the improvement of the connection strength between the injection molded part 30 and the metal connector 20.

[0054] In this embodiment, the cross-sectional area of ​​the end of the avoidance hole 221 close to the first side 225 is smaller than the cross-sectional area of ​​the end of the avoidance hole 221 close to the second side 226; the first reinforced connection portion 321 includes an interlaced section 321a that matches the shape of the avoidance hole 221. When the interlaced section 321a is inserted into the avoidance hole 221, it can play a self-locking role, so that the interlaced section 321a can be automatically stuck in the avoidance hole 221, so that the first reinforced connection portion 321 is more firmly defined on the metal connector 20, thereby improving the connection strength between the injection molded part 30 and the metal connector 20. Specifically, the interlaced section 321a of this embodiment is in the shape of a truncated cone, and the shape of the avoidance hole 221 is adapted thereto. Of course, in other embodiments, the interlaced section 321a can also be in the shape of a truncated cone or other suitable shapes.

[0055] In this embodiment, the first reinforced connection part 321 further includes a skirt plate 321b radially expanding outward from the end of the insertion section 321a along the insertion section 321a, the skirt plate 321b is clamped at the corresponding port of the avoidance hole 221, and the skirt plate 321b is bonded to the metal plate 10. On the one hand, the skirt plate 321b can limit the insertion section 321a from being separated from the avoidance hole 221, thereby limiting the first reinforced connection part 321 from being separated from the metal connector 20, thereby reducing the probability of the injection molded part 30 being separated from the metal connector 20; on the other hand, the skirt plate 321b can also increase the contact area between the first reinforced connection part 321 and the metal plate 10, increase the bonding strength between the two, and thus increase the connection strength between the injection molded part 30 and the metal plate 10.

[0056] In this embodiment, a sink 224 is provided at the edge of the port of the avoidance hole 221 close to the second side surface 226, and the shape of the sink 224 matches the shape of the skirt 321b. The sink 224 can store the skirt 321b, reduce the volume of the part of the skirt 321b protruding from the second side surface 226, and in a preferred embodiment, the bottom surface of the skirt 321b is flush with the edge of the sink 224, so that the skirt 321b can contact the metal plate 10, but will not be stuck between the metal plate 10 and the second side surface 226 of the second end 22, so as to avoid the metal plate 10 and the second side surface 226 of the second end 22 being unable to fully contact and fit, thereby reducing the quality of subsequent welding between the second end 22 and the metal plate 10.

[0057] In this embodiment, the reinforced connection portion includes a second reinforced connection portion 322 opposite to the edge of the second end 22; the second reinforced connection portion 322 is bonded to the metal plate 10. By bonding the first reinforced connection portion 321 and the second reinforced connection portion 322 to the metal plate 10, the contact area between the injection molded part 30 and the metal plate 10 can be increased, thereby increasing the connection strength between the two. Preferably, the number of second reinforced connection portions 322 is two, and the second reinforced connection portions 322 are respectively located on opposite sides of the extension portion 32, and the first reinforced connection portion 321 is located between the two second reinforced connection portions 322. A notch 223 is respectively provided on the opposite sides of the second end 22 of the metal connector 20, and the two second reinforced connecting parts 322 respectively correspond to the two notches 223 of the second end 22. The second reinforced connecting parts 322 can limit the lateral swing of the second end 22 of the metal connector 20, and the extension part 32 can limit the metal connector 20 from separating upward from the metal plate 10. Through the aforementioned method, the second end 22 of the metal connector 20 can be confined on the metal plate 10, which is conducive to the subsequent precise welding of the second end 22 and the metal plate 10.

[0058] In this embodiment, a casting hole 211 is formed at the first end 21 of the metal connector 20, and a portion of the wrapping portion 31 of the injection molded part 30 passes through the casting hole 211. For example, the wrapping portion 31 of the injection molded part 30 includes a clamping column inside, and the clamping column is formed during the injection molding process of the injection molded part 30. The clamping column passes through the casting hole 211, and is thus clamped in the casting hole 211, so that the injection molded part 30 can be prevented from being separated from the first end 21 of the metal connector 20, thereby increasing the connection strength between the injection molded part 30 and the metal connector 20.

[0059] This embodiment discloses a method for manufacturing a hinge decoration of a folding screen mobile phone, comprising the following steps:

[0060] S1. Prepare a metal plate 10 and a metal connector 20 respectively, wherein the metal connector 202 includes a first end 21 extending vertically and a second end 22 extending laterally from the bottom of the first end 21, and the second end 22 includes a first side surface 225 and a second side surface 226 arranged opposite to each other in the vertical direction;

[0061] S2. The injection molded part 30 is disposed on the metal connector 20 by injection molding, so that the injection molded part 30 forms a wrapping portion 31 wrapped around the first end 21, an elongated portion 32 attached to the first side surface 225, and an extended reinforcing connection portion extending vertically. The elongated portion 32 is connected to the wrapping portion 31. The reinforcing connection portion is connected to the elongated portion 32. Specifically, the reinforcing connection portion extends downward from the bottom surface of the elongated portion 32.

[0062] S3. The side of the reinforced connection part facing away from the extension part 32 is bonded to the metal plate 10, so that the injection molded part 30 can be pre-positioned on the metal part, which is conducive to the subsequent accurate welding of the metal connector 20 on the metal part, and the connection strength between the injection molded part 30 and the metal plate 10 can be improved. In this step, the second side surface 226 of the metal connector 20 is also pre-fixed to the metal plate 10 by bonding, which is convenient for the subsequent accurate welding of the metal connector 20 on the metal plate 10, improves the welding quality of the metal connector 20 and the metal plate 10, and is conducive to improving the connection strength between the two.

[0063] S4. Weld the second end 22 to the metal connecting member 20 to obtain a rotating shaft decorative member.

[0064] In this embodiment, step S3 includes: S31. applying glue on the connection surface of the metal plate 10 to form a plurality of glue application locations 12 on the connection surface;

[0065] S32. Press the second end 22 and the extension portion 32 toward the connecting surface of the metal plate 10 so that the side of the reinforced connecting portion facing away from the extension portion 32 and the second side surface 226 of the metal connecting member 20 are synchronously squeezed and bonded to the corresponding glue dispensing position 12.

[0066] After the connection surface of the metal plate 10 is glued, the applied glue can bond and fix the second side surface 226 of the metal connector 20 and the reinforced connection portion of the injection molded part 30 , thereby increasing the connection strength between the metal plate 10 and the injection molded part 30 .

[0067] In actual production, the subsequent welding process is generally carried out after the glue is cured. If quick-drying glue is used, the waiting process can be ignored, because the glue can be completely cured during the transfer process of different workstations. Of course, in other embodiments, in order to speed up the curing cycle of the glue, a drying process can also be added, specifically, wind heat drying or oven drying can be used to ensure that the glue is completely cured.

[0068] In this embodiment, in step S1, the second end 22 of the metal connector 20 is provided with an avoidance hole 221 that passes through the first side surface 225 and the second side surface 226; the reinforced connection portion includes a first reinforced connection portion 321, and the first reinforced connection portion 321 is protruded on the side of the extension portion 32 facing the first side surface 225, and is inserted into the avoidance hole 221; the process of bonding the side of the reinforced connection portion facing away from the extension portion 32 to the metal plate 10 includes: bonding and fixing the end of the first reinforced connection portion 321 away from the extension portion 32 to the metal plate 10.

[0069] In this embodiment, the process of preparing the metal connector 20 in step S1 includes: providing a metal substrate plate, punching out a plurality of metal connectors 20 and a connecting plate (not shown in the figure) on the metal substrate plate by punching, and the end face of the second end 22 of each metal connector 20 is fixed to the connecting plate; in step S2, the process of setting the injection molded part 30 on the metal connector 20 by injection molding includes: placing each of the metal connectors 20 into a mold cavity respectively, thereby implanting each of the metal connectors 20 into a mold cavity respectively, so as to perform subsequent injection molding, and completing the process of setting the injection molded part 30 on the metal connector 20; and then cutting off the plurality of metal connectors 20 from the connecting plate by punching. Processing metal connectors by punching can reduce manufacturing costs and improve manufacturing efficiency. In addition, the above scheme can be used to set the injection molded part 30 on multiple metal connectors 20 at one time, which is more efficient. The injection molded part 30 of this embodiment is preferably a component made of TPU material.

[0070] Furthermore, in order to improve the bonding strength between the injection molded part 30 and the metal connector 20, the present embodiment adds a surface coating, such as a PVD coating, a nano coating, etc., to the surface of the metal connector 20. Specifically, a plurality of metal connectors 20 are punched out on the metal substrate, a surface coating is applied to the surface of each metal connector 20, and then a subsequent injection molding process is performed.

[0071] Furthermore, in order to improve the positioning accuracy of the metal connector 20 implanted into the mold cavity, the present embodiment provides a plurality of positioning holes on the connecting plate (not shown in the figure). During the process of implanting the metal connector 20 into the mold cavity, each positioning hole is engaged with the positioning pin on the mold, so that each metal connector 20 can be accurately positioned in the corresponding mold cavity.

[0072] like Figure 6 and Figure 8As shown, in order to further improve the connection strength between the metal plate 10 and the injection molded part 30, a first reinforced connection portion 321 is provided on the metal connector 20, and the first reinforced connection portion 321 is provided on the bottom surface of the extension portion 32, and the bottom surface is directly opposite to the first side surface 225. Since the second end 22 of the metal connector 20 is provided with an avoidance hole 221 corresponding to the shape and position of the first reinforced connection portion 321, the first reinforced connection portion 321 can be stably inserted in the avoidance hole 221. On the one hand, the injection molded part 30 and the metal connector can be further improved. On the other hand, since the avoidance hole 221 passes through the first side surface 225 and the second side surface 226, the bottom end of the first reinforced connection part 321 inserted in the avoidance hole 221 can be in contact with the connection surface of the metal plate 10. After glue is applied to the connection surface, the first reinforced connection part 321 can be bonded and fixed to the glue point 12 of the connection surface of the metal plate 10. In addition to the bonding and fixing relationship between the metal connecting part 20 and the metal plate 10, the injection molded part 30 is also synchronously fixed to the metal plate 10 through the first reinforced connection part 321.

[0073] The first reinforced connection part 321 may preferably be in the shape of a truncated cone, and the shape of the avoidance hole 221 corresponds thereto. The bottom diameter of the truncated cone-shaped first reinforced connection part 321331 is ≥ the top diameter. At this time, it is difficult to pull the first reinforced connection part 321 out of the avoidance hole 221; of course, in other embodiments, the first reinforced connection part 321 may also be adjusted to other shapes, and the shape of the avoidance hole 221 changes accordingly.

[0074] Further, the enhanced connection portion includes a second enhanced connection portion 322 opposite to the edge of the second end 22;

[0075] In step S3 , the process of bonding the side of the reinforcing connection portion facing away from the extension portion 32 to the metal plate 10 includes: bonding and fixing the side of the second reinforcing connection portion 322 facing away from the extension portion 32 to the metal plate 10 .

[0076] like Figures 5 and 6 As shown, the reinforced connection part also includes a second reinforced connection part 322, which is located on the outer side of the edge of the metal connector 20 and is arranged to fit the edge of the metal connector 20. The bottom end of the second reinforced connection part 322 is bonded to the glue point 12 on the connecting surface of the metal plate 10, that is, the injection molded part 30 is not only provided with a first reinforced connection part 321 to be bonded and fixed to the metal plate 10, but is also bonded and fixed to the metal plate 10 through the second reinforced connection part 322. The contact area between the injection molded part 30 and the metal plate 10 is increased, and the bonding and fixing area is increased, thereby further improving the connection strength between the injection molded part 30 and the metal plate 10.

[0077] As a preferred solution, the metal connector 20, in addition to being a connecting medium, can also act as a retainer to maintain a specific positional relationship between the flexible injection molded part 30 and the metal plate 10. Specifically, the metal connector 20 is L-shaped, the injection molded part 30 is connected to the first end 21 (vertical extension direction) of the metal connector 20, the reinforced connection portion of the injection molded part 30 is fitted with the second end 22 of the metal connector 20, and the second end 22 (lateral extension direction) of the metal connector 20 is welded and fixed to the metal plate 10.

[0078] Furthermore, in step S1, the connection surface of the metal plate 10 is recessed downward to form a groove 11;

[0079] In step S3, glue is applied to the bottom surface inside the groove 11, and the second end 22 of the metal connector 20 is placed in the groove 11, so that the second side surface 226, the end of the first reinforced connection part 321 away from the extension part 32, and the side of the second reinforced connection part 322 facing away from the extension part 32 are all bonded and fixed to the groove 11.

[0080] In some embodiments, the metal connector 20 and the injection molded part 30 can be directly fixed to the top of the metal plate 10 .

[0081] In order to improve the fixing strength of the metal connector 20, the injection molded part 30 and the metal plate 10, a groove 11 is set on the top surface of the metal plate 10, and glue is dispensed at multiple points in the groove 11 of the metal plate 10, so that the second side surface 226, the bottom surface of the first reinforced connection part 321 and the bottom surface of the second reinforced connection part 322 are all bonded and fixed in the groove 11, and the second end 22 of the metal connector 20 and the injection molded part 30 are limited by the groove 11, so that the glue-dispensed part adheres to the second end 22 of the metal connector 20, forming a pre-positioning effect on the metal connector 20, thereby ensuring the position accuracy of the second end 22 and the metal plate 10, making it difficult for the metal connector 20 and the injection molded part 30 to shift after being bonded and fixed, which is also beneficial to improving the subsequent welding accuracy and welding quality.

[0082] Furthermore, in step S1, at least one side of the second end 22 of the metal connector 20 extends outward to form a wing plate 222;

[0083] In step S3, when the second end 22 of the metal connector 20 is placed in the groove 11, the wing plate 222 is fitted in the groove 11, and the wing plate 222 contacts the side wall of the groove 11, and the wing plate 222 is welded and fixed to the metal plate 10 along the contact portion.

[0084] By setting the wing plate 222, the welding fixing area between the second end 22 of the metal connector 20 and the metal plate 10 can be further increased. Among them, the second side surface 226 of the second end 22 is bonded to the metal plate 10 by glue dispensing. Since the wing plate 222 and the side wall of the groove 11 can be ensured to contact each other during bonding and fixing, the wing plate 222 can be welded to the metal plate 10 by side seam welding (specifically, the wing plate 222 is welded and fixed at the contact point with the inner wall of the groove 11 of the metal plate 10). Through the dual connection method of bonding and welding, the connection strength between the metal connector 20 and the metal plate 10 is further improved.

[0085] In different embodiments, the number of wing plates 222 on the second end 22 can be adjusted adaptively, such as the wing plates 222 can be set to 1, 2 or more. When the number is multiple, the wing plates 222 are preferably symmetrically arranged along both sides of the second end 22 of the metal connector 20, and the top surface of the metal plate 10 has a groove 11 that matches the shape of the metal connector 20.

[0086] Furthermore, in step S3, before welding, a clamp is first used to continuously press the metal connector 20 and the injection molded part 30 onto the metal plate 10, so that the second side surface 226, the end of the first reinforced connection part 321 away from the extension part 32, and the side of the second reinforced connection part 322 facing away from the extension part 32 are continuously squeezed with glue, and the edge of the wing plate 222 is continuously in contact with the side wall of the groove 11.

[0087] In the above process, after the metal connector 20 and the injection molded part 30 are bonded and fixed to the metal plate 10, the first end 21 of the metal connector 20 and the injection molded part 30 are pressed onto the metal plate 10 using a fixture cover, and the fixture cover is locked to the fixture seat using fasteners. At this time, the fixture cover will continue to squeeze the second end 22 of the metal connector 20 and the injection molded part 30, ensuring that the second side surface 226 of the metal connector 20, the bottom surface of the first reinforced connection part 321, and the bottom surface of the second reinforced connection part 322 all continue to squeeze the corresponding glue spot positions, so that the glue is tightly bonded to the metal connector 20 and the injection molded part 30; at the same time, it can also ensure that the wing plate 222 is tightly attached to the top surface of the metal plate 10, so that the edge of the wing plate 222 is in continuous contact with the side wall of the groove 11, which is beneficial to improving the subsequent welding accuracy and quality. The aforementioned clamp cover is provided with a window. When the clamp cover presses the metal connector 20 and the injection molded part 30 onto the metal plate 10, the position of the window corresponds to the edge position of the wing plate 222. For example, the window is located directly above the edge of the wing plate 222. Of course, it can also be located obliquely above.

[0088] Furthermore, in step S3, the wing plate 222 is welded to the top surface of the metal plate 10 by laser welding, and the incident laser is incident at an angle during welding.

[0089] After waiting for the glue at the gluing position to solidify, laser welding is used to spot weld the edge of the wing plate 222 of the metal connector 20 from the window position of the fixture cover, so that the wing plate 222 is welded to the top surface of the metal plate 101. The visual inspection system is used to locate the welding position during the welding process.

[0090] The metal plate 101 is a thin-walled precision part. During the welding process, if the vertical light-input welding method is adopted, the laser focal length accuracy is extremely high. When the laser focal length is too deep, it is possible to melt through the metal plate 101; when the laser focal length is too shallow, the welding is not in place and the welding quality is poor. Fig.11 As shown, as a preferred solution, the laser welding process of this embodiment adopts an oblique light input method, so that the incident laser just hits the abutment boundary between the wing plate 222 and the side wall of the groove 11 (this is the ideal position) or a slightly deeper position (the allowable error range) to melt the edge of the wing plate 222 and the side wall of the groove 11, so that the two are combined. The use of the oblique light input method has a loose requirement on the focal length accuracy, allowing it to slightly float between the deeper position and the ideal position, reducing the difficulty of welding, and at the same time, it can greatly reduce the probability of the metal plate 10 being melted through.

[0091] Furthermore, in step S3, a visual inspection system is used to determine the application position of the glue, and then glue is dispensed in the groove 11, and the glue applied in the groove 11 is arranged in a "Y" shape. By using the glue dispensing method, the bonding strength can be ensured while avoiding the use of too much glue. Glue is applied at the required fixed position in the groove 11. In this solution, the glue can be arranged in a "Y" shape to ensure that the second side 226 of the metal connector 20, the first reinforced connection part 321 and the second reinforced connection part 322 are all bonded and fixed with the glue in the groove 11.

[0092] In other embodiments, the glue may be arranged in a "U" shape, or a combination of a "U" shape and a "Y" shape; of course, the glue may also be applied entirely within the groove 1111.

[0093] Furthermore, in step S1 , a plurality of casting holes 211 are opened on the first end 21 of the metal connector 20 , so that during the injection molding in step S2 , the wrapping portion 31 of the injection molded part 30 partially passes through the casting holes 211 .

[0094] like Figure 5As shown, as a preferred embodiment, a casting hole 211 is opened on the first end 21 of the metal connector 20. During the injection molding process, liquid soft non-metallic material (such as TPU material) can be poured into the casting hole 211, so that the molded soft non-metal wraps the first end 21 of the metal connector 20. Part of the TPU material passes through the casting hole 211 and forms a clamping column (not shown in the figure) after cooling. The clamping column is clamped in the casting hole 211, thereby improving the connection strength between the injection molded part 30 and the metal connector 20, and the two are not easily separated even if they are pulled by external force.

[0095] In different embodiments, the number of the casting holes 211 on the first end 21 can be adjusted adaptively, such as being set to 1, 2 or more.

[0096] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A hinge decoration for a folding screen mobile phone, characterized in that: include: A metal connector (20), the metal connector (20) comprising a first end (21) extending in a vertical direction and a second end (22) extending in a transverse direction from a bottom of the first end (21); the second end (22) comprising a first side surface (225) and a second side surface (226) arranged opposite to each other in a vertical direction; An injection molded part (30), the injection molded part (30) comprising a wrapping portion (31) wrapped around the first end (21), an extension portion (32) attached to the first side surface (225), and a reinforcing connection portion extending vertically; the extension portion (32) is connected to the wrapping portion (31), and the reinforcing connection portion is connected to the extension portion (32); and A metal plate (10), the metal plate (10) is bonded to the second side surface (226) and the reinforced connection portion, and is welded to the second end (22).

2. The hinge decoration of the folding screen mobile phone according to claim 1, characterized in that: The second end (22) is provided with an avoidance hole (221) vertically penetrating the first side surface (225) and the second side surface (226); the reinforced connection portion comprises a first reinforced connection portion (321) penetrating the avoidance hole (221) and bonded to the metal plate (10).

3. The hinge decoration of the folding screen mobile phone according to claim 2, characterized in that: The cross-sectional area of ​​the end of the avoidance hole (221) close to the first side surface (225) is smaller than the cross-sectional area of ​​the end of the avoidance hole (221) close to the second side surface (226); the first reinforced connection portion (321) comprises an insertion section (321a) adapted to the shape of the avoidance hole (221) and a skirt plate (321b) radially expanding outward from the end of the insertion section (321a) along the insertion section (321a), and the skirt plate (321b) is clamped in a corresponding port of the avoidance hole (221); and the skirt plate (321b) is bonded to the metal plate (10).

4. The hinge decoration of the folding screen mobile phone according to claim 3, characterized in that: A sink (224) is provided at the edge of the port of the avoidance hole (221) close to the second side surface (226); the shape of the sink (224) is adapted to the shape of the skirt plate (321b).

5. The hinge decoration of the folding screen mobile phone according to any one of claims 1 to 4, characterized in that: The reinforced connection portion comprises a second reinforced connection portion (322) opposite to an edge of the second end (22); the second reinforced connection portion (322) is bonded to the metal plate (10).

6. A method for manufacturing a rotating shaft decoration of a folding screen mobile phone, characterized in that: The steps include: S1. preparing a metal plate (10) and a metal connector (20) respectively, wherein the metal connector (20) comprises a first end (21) extending in a vertical direction and a second end (22) extending in a transverse direction from a bottom of the first end (21), and the second end (22) comprises a first side surface (225) and a second side surface (226) arranged opposite to each other in a vertical direction; S2. an injection molded part (30) is arranged on the metal connector (20) by injection molding, so that the injection molded part (30) forms a wrapping portion (31) wrapped around the first end (21), an elongated portion (32) attached to the first side surface (225), and a reinforced connection portion extending vertically, wherein the elongated portion (32) is connected to the wrapping portion (31), and the reinforced connection portion is connected to the elongated portion (32); S3. bonding the side of the reinforced connection portion facing away from the extension portion (32) to the metal plate (10); pre-fixing the second side surface (226) to the metal plate (10) by bonding; S4. Welding the second end (22) to the metal connecting piece (20) to obtain the rotating shaft decorative piece.

7. The method for manufacturing a rotating shaft decoration of a folding screen mobile phone according to claim 6, characterized in that: Step S3 includes: S31. Applying glue to the connection surface of the metal plate (10) to form a plurality of glue application locations (12) on the connection surface; S32. Press the second end (22) and the extension portion (32) toward the connecting surface of the metal plate (10) at the same time, so that the side of the reinforced connecting portion facing away from the extension portion (32) and the second side surface (226) of the metal connecting part (20) are synchronously extruded and bonded to the corresponding glue dispensing position (12).

8. The method for manufacturing a rotating shaft decoration of a folding screen mobile phone according to claim 6, characterized in that: In step S1, the process of preparing the metal connector (20) includes: providing a metal substrate plate, punching out a plurality of the metal connectors (20) and a connecting plate from the metal substrate plate by punching, and the end surface of the second end (22) of each metal connector (20) is fixedly connected to the connecting plate; In step S2, the process of arranging the injection molded part (30) on the metal connector (20) by injection molding includes: placing each of the metal connectors (20) in a mold cavity, performing injection molding, and completing the process of arranging the injection molded part (30) on the metal connector (20); and then cutting the plurality of metal connectors (20) from the connecting plate by punching.

9. The method for manufacturing a rotating shaft decoration of a folding screen mobile phone according to claim 6, characterized in that: The second end (22) of the metal connector (20) is provided with an avoidance hole (221) penetrating the first side surface (225) and the second side surface (226); the reinforced connection portion comprises a first reinforced connection portion (321) and a second reinforced connection portion (322); the first reinforced connection portion (321) is protrudingly arranged on a side of the extension portion (32) facing the first side surface (225), and is inserted into the avoidance hole (221); the second reinforced connection portion (322) is opposite to an edge of the second end (22); In step S1, the process of bonding the side of the reinforced connection portion facing away from the extension portion (32) to the metal member comprises: bonding and fixing the end of the first reinforced connection portion (321) away from the extension portion (32) to the metal member; In step S3, the process of bonding the side of the reinforced connection part facing away from the extension part (32) to the metal plate (10) includes: bonding and fixing the side of the second reinforced connection part (322) facing away from the extension part (32) to the metal plate (10).

10. The method for manufacturing a rotating shaft decoration of a folding screen mobile phone according to claim 9, characterized in that: In step S3, before welding, a clamp is first used to continuously press the metal connector (20) and the injection molded part (30) onto the metal plate (10), so that glue is continuously squeezed on the second side surface (226), the end of the first reinforced connecting part (321) away from the extension part (32), and the side of the second reinforced connecting part (322) facing away from the extension part (32).

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