A soft rubber sleeve metal structure

Abstract

The present application relates to the technical field of soft glue injection molding, and provides a soft glue-coated metal structure, which includes a metal body and a soft glue structure directly connected to the metal body, the metal body is provided with a glue pulling through hole, and the soft glue structure penetrates the glue pulling through hole to form a glue pulling structure. The soft glue-coated metal structure increases the adhesion between the soft glue and the metal by having the soft glue structure penetrate the glue pulling through hole to form a glue pulling structure, and can make the soft glue directly coated on the metal, reducing secondary assembly, which not only makes the product a whole and more beautiful, but also reduces intermediate processing links and reduces product costs.

Description

Technical Field

[0001] The present application relates to the technical field of soft rubber injection molding, and more specifically, to a soft rubber-coated metal structure. Background Art

[0002] In the current electronic products of the prior art, it is usually difficult to directly use TPU (soft glue) to cover metal, because there is no adhesion when the soft glue covers the metal, and the soft glue and metal are easy to delaminate. If the metal needs to be covered with soft glue, it is usually necessary to disassemble the parts separately. For example, a soft glue protective cover is put on the product or a soft glue is covered on a hard glue (plastic), and then assembled on the metal part. Summary of the invention

[0003] The main purpose of the present invention is to provide a soft rubber-coated metal structure, aiming to solve the technical problem in the prior art that it is difficult to directly coat the metal with soft rubber.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a soft rubber-covered metal structure, which includes a metal body and a soft rubber structure directly connected to the metal body, the metal body is provided with a rubber pulling hole, and the soft rubber structure is arranged in the rubber pulling hole to form a rubber pulling structure.

[0005] Furthermore, the glue pulling hole is a glue pulling through hole, and the soft glue structure penetrates the glue pulling through hole to form the glue pulling structure.

[0006] Further, the soft glue structure includes a closed-loop structure that passes through the glue-drawing through hole and surrounds and covers a part of the metal body, and / or the soft glue structure includes a non-closed-loop structure that passes through the glue-drawing through hole.

[0007] Furthermore, the glue pulling through hole includes a first through hole and a second through hole, and a connecting groove is provided on one side surface of the metal body, and the first through hole and the second through hole are connected through the connecting groove, or the first through hole and the second through hole are not connected to each other.

[0008] Furthermore, both ends of the glue drawing through hole gradually expand outwards.

[0009] Furthermore, a blind hole is provided on the metal body, and the soft glue structure is embedded in the blind hole, and / or a glue pulling groove is provided on the metal body, and the soft glue structure is embedded in the glue pulling groove.

[0010] Furthermore, when a glue drawing groove is provided on the metal body, the glue drawing groove is a groove that is larger inside and smaller outside.

[0011] Furthermore, the metal body is a metal shell of an electronic product, and a port is provided on the metal shell, and the port includes at least one of a USB Type-C port, a speaker port and a button port.

[0012] Furthermore, the port includes a USB Type-C port, and the metal body processes a blind hole at the USB Type-C port by using a tool to open the blind hole into the glue pulling through hole.

[0013] Further, the port includes a button port, the glue through hole has a transverse through hole penetrating the metal body along the width direction or the length direction of the metal body at the button port, the glue through hole has a longitudinal through hole penetrating the metal body along the thickness direction of the metal body at the button port, and the soft glue structure penetrates the transverse through hole and the longitudinal through hole to form a glue structure.

[0014] Furthermore, a side end of the metal body has a glue pulling opening, and the soft glue structure penetrates the glue pulling opening to form a glue pulling structure.

[0015] Furthermore, the glue drawing opening is an opening that is larger inside and smaller outside.

[0016] Furthermore, the hardness of the metal soft glue is greater than 80A.

[0017] Furthermore, glue is coated at a position where at least a portion of the metal body is connected to the glue-drawing structure.

[0018] In addition, the present invention also provides a shell of an electronic device, comprising a shell body, wherein the shell body is provided with the above-mentioned soft rubber sleeve metal structure.

[0019] The beneficial effects of the soft rubber sleeve metal structure provided by the present application are:

[0020] In the soft-rubber-on-metal structure provided by the present application, the soft rubber can be directly on the metal to reduce secondary assembly, which not only makes the product an integral whole and more beautiful, but also reduces intermediate processing links and reduces product costs.

[0021] In a further solution, the adhesion between the soft glue and the metal is increased by forming a glue structure through the glue drawing hole by the soft glue structure. The soft glue structure includes a closed-loop structure that penetrates the glue drawing hole and surrounds and covers a part of the metal body. That is, the purpose of tightly holding the soft glue to the metal part is achieved through the structural glue drawing closed loop. It can also be understood as being similar to threading a thread to mend clothes, and the soft glue is tightly attached to the metal part through the structural glue drawing closed loop. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A front view of a soft rubber sleeve metal structure provided by an embodiment of the present application before being sleeved;

[0024] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0025] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0026] Figure 4 for Figure 1 A partial enlarged view of point C in the middle;

[0027] Figure 5 A partial cross-sectional schematic diagram of a soft rubber sleeve metal structure provided by an embodiment of the present application;

[0028] Figure 6 A three-dimensional diagram of a soft rubber sleeve metal structure before being sleeved provided by an embodiment of the present application;

[0029] Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0030] Figure 8 for Figure 6 A partial enlarged view of point B in the middle;

[0031] Fig. 9 for Figure 6 A partial enlarged view of point C in the middle;

[0032] Fig.10 A partial stereoscopic view of a metal structure of a soft rubber sleeve provided by an embodiment of the present application from one viewing angle;

[0033] Fig.11 A partial stereoscopic view from another perspective of the soft rubber sleeve metal structure provided in one embodiment of the present application.

[0034] The reference numerals in the above drawings are as follows:

[0035] 100-metal body; 101-glue through hole; 102-first through hole; 103-second through hole; 104-connecting groove; 105-dovetail groove; 106-dovetail opening; 107-USB Type-C port; 108-speaker port; 109-button port; 110-longitudinal through hole; 200-soft glue structure; 201-closed loop structure; 202-non-closed loop structure. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In addition, for the relevant explanation of the term "overmolding", please refer to "Secondary injection molding: a special plastic molding process, also known as overmolding or encapsulation".

[0041] In order to illustrate the technical solution described in this application, a detailed description is given below in conjunction with specific drawings and embodiments.

[0042] See also Figure 1 , Fig.10 and Fig.11The embodiment of the present invention provides a soft rubber sleeve metal structure, which includes a metal body 100 and a soft rubber structure 200 directly connected to the metal body 100. The metal body 100 is provided with a rubber hole, which can be a U-shaped groove or a rubber through hole 101 (also called a rubber through hole). The soft rubber structure 200 is arranged in the rubber through hole 101 to form a rubber structure. The soft rubber structure 200 may not penetrate the rubber through hole 101, for example, it is arranged in the U-shaped groove, or the soft rubber structure 200 may also penetrate the rubber through hole 101 to form a rubber structure. The rubber structure is the soft rubber sleeve of the present application. One of the core technical concepts of the metal structure is that the soft glue structure 200 penetrates the glue drawing through hole 101 to form a glue drawing structure, which increases the adhesion between the soft glue and the metal and allows the soft glue to be directly applied to the metal to reduce secondary assembly. It not only makes the product a whole and more beautiful, but also reduces the intermediate processing links, making the cost lower. The "soft glue" in the soft glue structure 200 usually refers to TPU (Thermoplasticpolyurethanes), that is, thermoplastic polyurethane elastomer rubber, but it can also refer to other suitable types of soft glue.

[0043] See also Figure 5 According to one embodiment of the present invention, the soft glue structure 200 includes a closed-loop structure 201 that penetrates the glue through hole 101 and surrounds and covers a part of the metal body 100. The purpose of tightly holding the soft glue to the metal part is achieved through the structural glue closed loop, that is, a full circle of continuous glue structure. It can also be understood as similar to threading and mending clothes, and the soft glue is tightly attached to the metal part through the structural glue closed loop.

[0044] Of course, not all of the soft rubber structures 200 in the soft rubber-covered metal structure of the present invention need to form a rubber-drawn closed loop. Figure 5 According to another embodiment of the present invention, the soft glue structure 200 includes a non-closed loop structure 202 that passes through the glue pulling hole 101. The non-closed loop structure 202 will not form a complete circle of continuous glue pulling structure. Since the interlocking force is formed by passing through the glue pulling hole 101, it can also play a role in increasing the connection force (glue pulling force) between the soft glue and the metal part.

[0045] See also Figure 2According to one embodiment of the present invention, the glue through hole 101 includes a first through hole 102 and a second through hole 103 spaced apart from each other, and a connecting groove 104 is provided on one side surface of the metal body 100, and the first through hole 102 and the second through hole 103 are connected through the connecting groove 104, which is equivalent to the first through hole 102 and the second through hole 103 forming a group of glue through holes 101, and multiple groups of glue through holes 101 can be formed at intervals on the metal body 100, and the soft glue structure 200 forms a through structure with each group of glue through holes 101, which greatly enhances the connection force between the soft glue structure 200 and the metal body 100; according to another embodiment of the present invention, the connecting groove 104 may not be provided, and the first through hole 102 and the second through hole 103 are not connected. In addition, the shapes of the first through hole 102 and the second through hole 103 are not particularly limited, for example, round holes, triangular holes, square holes or dovetail holes are all possible.

[0046] See also Figure 5 According to one embodiment of the present invention, both ends of the adhesive through hole 101 gradually expand outward, that is, the through hole forms a structure that is narrow in the middle and thick at both ends. This can increase the fitting force between the soft adhesive structure 200 and the adhesive through hole 101. Of course, as other embodiments, it is also acceptable even if the aperture of the adhesive through hole 101 remains the same.

[0047] According to one embodiment of the present invention, a blind hole is provided on the metal body 100, and the soft glue structure 200 is embedded in the blind hole. The soft glue structure 200 embedded in the blind hole can also increase the connection force (glue pulling force) between the soft glue structure 200 and the metal body 100. The blind hole can be provided near the glue pulling through hole 101 to cooperate with it, or it can act independently at a position far away from the glue pulling through hole 101.

[0048] See also Figure 3 According to one embodiment of the present invention, a glue pulling groove is provided on the metal body 100, and the soft glue structure 200 is embedded in the glue pulling groove to increase the connection force (glue pulling force) between the soft glue structure 200 and the metal body 100. Preferably, the glue pulling groove is a groove that is larger inside and smaller outside, that is, the outer side of the groove close to the metal body 100 is the large head side, and the inner side of the metal body 100 is the small head side. The glue pulling groove can specifically form a dovetail groove 105, a T-shaped groove, a trapezoidal groove, a triangular groove, etc. Similarly, the glue pulling groove can be arranged near the glue pulling through hole 101 to form a match therewith, or it can act independently at a position far away from the glue pulling through hole 101. In fact, the working principle of the glue pulling groove is similar to the blind hole mentioned above.

[0049] The position layout and quantity layout of the above-mentioned glue pulling through holes 101 (including but not limited to the first through hole 102 and the second through hole 103), blind holes, and glue pulling grooves on the metal body 100 are not subject to special restrictions. Theoretically, they can be set at any suitable position on the metal body 100, but are usually as close to the edge of the metal body 100 as possible to facilitate glue pulling. More specifically, the blind holes and glue pulling grooves can be set on the front side of the metal body 100, or on the back side or even the end side of the metal body 100. The connecting groove 104 is usually set on the front side of the metal body 100. If the metal body 100 is a mobile phone case, the front side of the metal body 100 is usually understood as the outer side, and the back side of the metal body 100 is usually understood as the inner side.

[0050] See also Figures 6 to 9 According to one embodiment of the present invention, the metal body 100 is a metal shell of an electronic product (such as a metal shell of a mobile phone, a tablet computer, etc.), and a port is provided on the metal shell, and the port includes at least one of a USB Type-C port 107, a speaker port 108 and a button port 109, and of course other types of ports may also be included.

[0051] See also Figure 7 According to one embodiment of the present invention, the port includes a USB Type-C port 107, and the metal body 100 uses a tool to process a blind hole at the USB Type-C port 107 to open the blind hole into a glue pulling through hole 101. Since the adhesive surface of the soft glue must be glued to the metal, the soft glue and the double-sided adhesive have insufficient adhesion and cannot be used as an effective adhesive area. Therefore, a certain width must be reserved at the port position to bond the double-sided adhesive (or dispense glue). Due to the limited structural area of ​​the port position, it is impossible to make a through-hole glue pulling design, so the metal middle frame needs to be processed by a T knife for secondary processing to open the blind hole so that the soft glue can pass through the metal part to ensure that the glue pulling will not open.

[0052] See also Figure 8 According to an embodiment of the present invention, the port includes a speaker port 108. Since the speaker port 108 has a large span, a via hole is added in the middle to ensure the glue pulling force. At the same time, local via hole glue pulling is also required on both sides of the glue pulling via hole. The glue pulling structure is added to the back of the metal body 100 to ensure the glue pulling strength on the back.

[0053] See also Fig. 9According to one embodiment of the present invention, the port includes a button port 109, and the glue through hole 101 has a transverse through hole penetrating the metal body 100 along the width direction or the length direction of the metal body 100 at the button port 109 (the transverse through hole can directly use the through hole formed by the button port 109), and the glue through hole 101 has a longitudinal through hole 110 penetrating the metal body 100 along the thickness direction of the metal body 100 at the button port 109. The soft glue structure 200 penetrates the transverse through hole and the longitudinal through hole 110 to form a glue structure, which can be understood as the glue port position of the button position, and the glue penetrates inside and outside (that is, the above-mentioned penetration along the thickness direction of the metal body 100). At the same time, there is a front and back penetration (that is, the above-mentioned penetration in the width direction or the length direction of the metal body 100) in the middle of the key interval. The glue greatly improves the glue pulling force. Of course, if appropriate, other ports can also adopt detailed designs similar to the button port 109, which will not be repeated here.

[0054] See also Figure 4 In addition, the side end of the metal body 100 has a glue pulling opening, and the soft glue structure 200 passes through the glue pulling opening to form a glue pulling structure. According to one embodiment of the present invention, the glue pulling opening is an opening that is larger inside and smaller outside, that is, the opening is closer to the outside of the metal body 100 as the large head side, and closer to the inside of the metal body 100 as the small head side. The glue pulling opening can be specifically formed into a dovetail groove 105, a T-shaped groove, a trapezoidal groove, a triangular groove, etc. The dovetail groove 105 structure or a similar structure can increase the glue pulling force.

[0055] The second core technical concept of the present invention is that the hardness of the metal soft glue is greater than 80A (where A refers to Shore hardness A, which is a well-known technology). In order to improve the encapsulation force of the soft glue, the present invention has long explored and demonstrated that the hardness of the soft glue cannot be too soft, and a hardness greater than 80A is most appropriate.

[0056] The third core technical concept of the present invention is that at least a portion of the metal body 100 is coated with glue at the position where it is connected to the glue-drawing structure, but the coating of glue is not necessary, mainly depending on the structural space and the corresponding product quality requirements, such as coating glue. Specifically, the position where it is difficult to draw glue locally can be coated on the metal, for example, each port position can be selected, and the selected glue needs to be baked in an oven at 70°-90° for 7-9 minutes after coating, and then completed and soft glue injection molding within 11-13 hours. The comparison of the tensile force (adhesion force) test experimental data with and without glue is shown in Table 1 below.

[0057]

[0058] Table 1

[0059] In addition, the experimental results of the tensile force (adhesion force) test data in Table 1 are shown in Table 2 below:

[0060]

[0061] Table 2

[0062] It can be seen from Table 1 and Table 2 that the adhesion tests between the metal soft glue and the metal body 100 in this application are all qualified.

[0063] In addition, the present invention also provides a shell of an electronic device, including a shell body, on which the above-mentioned soft rubber-covered metal structure is arranged. Therefore, the shell of the electronic device has all the advantages of the above-mentioned soft rubber-covered metal structure, which will not be repeated here. The electronic device mentioned here can be a mobile phone, a tablet computer, etc.

[0064] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A soft rubber sleeve metal structure, characterized in that: It comprises a metal body and a soft glue structure directly connected to the metal body, the metal body is provided with a glue hole, and the soft glue structure is arranged in the glue hole to form a glue structure; The glue drawing hole is a glue drawing through hole; The adhesive drawing through hole comprises a first through hole and a second through hole spaced apart from each other, a connecting groove is provided on one side surface of the metal body, and the first through hole and the second through hole are connected through the connecting groove; a plurality of groups of adhesive drawing through holes are spaced apart from each other on the metal body; Both ends of the glue drawing through hole gradually expand outwards.

2. The soft rubber sleeve metal structure according to claim 1 is characterized in that: The soft glue structure penetrates the glue pulling through hole to form the glue pulling structure.

3. The soft rubber sleeve metal structure according to claim 2 is characterized in that: The soft glue structure includes a closed-loop structure that passes through the glue-drawing through hole and surrounds and covers a part of the metal body, and / or the soft glue structure includes a non-closed-loop structure that passes through the glue-drawing through hole.

4. The soft rubber sleeve metal structure according to claim 1 is characterized in that: The metal body is provided with a blind hole, and the soft glue structure is embedded in the blind hole, and / or the metal body is provided with a glue pulling groove, and the soft glue structure is embedded in the glue pulling groove.

5. The soft rubber sleeve metal structure according to claim 4 is characterized in that: When a glue drawing groove is provided on the metal body, the glue drawing groove is a groove that is larger inside and smaller outside.

6. The soft rubber sleeve metal structure according to any one of claims 1 to 5, characterized in that: The metal body is a metal shell of an electronic product, and a port is arranged on the metal shell, and the port includes at least one of a USB Type-C port, a speaker port and a button port.

7. The soft rubber sleeve metal structure according to claim 6 is characterized in that: The port comprises a USB Type-C port, and the metal body processes a blind hole at the USB Type-C port by a tool to open the blind hole into the glue-pulling through hole.

8. The soft rubber sleeve metal structure according to claim 6 is characterized in that: The port includes a button port, the glue through hole has a transverse through hole penetrating the metal body along the width direction or the length direction of the metal body at the button port, the glue through hole has a longitudinal through hole penetrating the metal body along the thickness direction of the metal body at the button port, and the soft glue structure penetrates the transverse through hole and the longitudinal through hole to form a glue structure.

9. The soft rubber-coated metal structure according to any one of claims 1 to 5, characterized in that: The side end of the metal body is provided with a glue pulling opening, and the soft glue structure penetrates through the glue pulling opening to form a glue pulling structure.

10. The soft rubber sleeve metal structure according to claim 9, characterized in that: The glue drawing opening is an opening that is larger inside and smaller outside.

11. The soft rubber-coated metal structure according to any one of claims 1 to 5, characterized in that: The hardness of the metal soft glue is greater than 80A.

12. The soft rubber-coated metal structure according to any one of claims 1 to 5, characterized in that: Glue is coated at a position where at least a portion of the metal body is connected to the glue-drawing structure.

13. A housing of an electronic device, comprising a housing body, characterized in that: The shell body is provided with a soft rubber sleeve metal structure according to any one of claims 1 to 12.

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