Ultrasonic welding structure

Abstract

The utility model relates to the technical field of ultrasonic welding, in particular to an ultrasonic welding structure which comprises a base and a cover plate, the base comprises a bottom plate and a peripheral plate, the peripheral plate is located above the bottom plate, a plurality of welding inner teeth are arranged on the inner side of the peripheral plate in a protruding mode, and the bottom plate, the peripheral plate and the welding inner teeth are integrally formed and connected. The multiple welding inner teeth are distributed in the circumferential direction of the peripheral plate at intervals, and outer welding bones are arranged on the outer contour of the cover plate and used for being in ultrasonic welding with the welding inner teeth. The multiple welding inner teeth are arranged and distributed at intervals in the circumferential direction of the outer peripheral plate, so that the large material thickness difference of the outer peripheral plate in the vertical direction is avoided, and the phenomenon of thick and thin marks during injection molding is avoided. Meanwhile, the outer welding bone is arranged on the outer contour of the cover plate and is in ultrasonic welding with the welding inner teeth, in the welding forming process, the outer welding bone and the welding inner teeth are fused, meanwhile, redundant fused materials are discharged between the two welding inner teeth, overflow is avoided, and the appearance quality of a welded finished product is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic welding, in particular to an ultrasonic welding structure. Background Art

[0002] Ultrasonic welding is widely used in the welding and bonding of plastic products due to its advanced technology. In some application scenarios, it is necessary to reserve the overlap surface of the parts during the injection molding process, which will cause the material thickness of one of the parts at the reserved overlap surface to be greater than the material thickness at other nearby positions. After injection molding, due to the different material thicknesses at different positions, the shrinkage rate of the material is different, which will lead to more obvious thickness printing problems. At the same time, during the ultrasonic welding process, the materials at the overlap surfaces of the parts are melted and bonded, and there is a risk of overflow after the material melts, which ultimately leads to poor appearance quality of the finished product after welding. Utility Model Content

[0003] The utility model aims to provide an ultrasonic welding structure to solve the problems of thickness marks and material overflow risks in the processing of the existing ultrasonic welding structure.

[0004] The utility model provides an ultrasonic welding structure, comprising a base and a cover plate, wherein the base comprises a bottom plate and an outer plate, the outer plate is located above the bottom plate, a plurality of welding inner teeth are protrudingly provided on the inner side of the outer plate, the bottom plate, the outer plate and the welding inner teeth are integrally formed and connected, the plurality of welding inner teeth are distributed at intervals along the circumference of the outer plate, an external welding bone is provided at the outer contour of the cover plate, and the external welding bone is used for ultrasonic welding with the welding inner teeth.

[0005] As a preferred technical solution for the ultrasonic welding structure, a plurality of external welding bones are provided, and the plurality of external welding bones are arranged at intervals along the outer contour of the cover plate.

[0006] As a preferred technical solution for the ultrasonic welding structure, a positioning sleeve is provided on the bottom plate, and a positioning column for cooperating with the positioning sleeve is provided on the cover plate.

[0007] As a preferred technical solution for the ultrasonic welding structure, there are two positioning sleeves, which are diagonally arranged on the bottom plate, and there are two positioning posts, which are respectively matched with the two positioning sleeves.

[0008] As a preferred technical solution for the ultrasonic welding structure, the positioning column and the positioning sleeve are clearance-matched.

[0009] As a preferred technical solution of the ultrasonic welding structure, a mating surface is formed at the top of the welded internal teeth, at least part of the external welding ribs is located within the mating surface, the mating surface has a first edge, a second edge and a third edge, the distance between the first edge and the inner side surface of the peripheral plate is greater than the distance between the second edge and the inner side surface of the peripheral plate, and the distance between the second edge and the inner side surface of the peripheral plate is greater than the distance between the third edge and the inner side surface of the peripheral plate. The edge of the cover plate is located between the first edge and the second edge on the mating surface.

[0010] As a preferred technical solution of the ultrasonic welding structure, an inner peripheral plate is integrally formed and connected to the bottom plate. The bottom plate is provided with a first through hole on the side of the inner peripheral plate facing away from the outer peripheral plate. A plurality of external welding teeth are convexly provided on the side of the inner peripheral plate facing the outer peripheral plate. The plurality of external welding teeth are circumferentially spaced apart along the outer peripheral plate. The cover plate is provided with a second through hole for aligning with the first through hole. An internal welding rib is provided at the edge of the second through hole of the cover plate. The internal welding rib is used for ultrasonic welding with the external welding teeth.

[0011] As a preferred technical solution of the ultrasonic welding structure, a plurality of internal welding ribs are provided, and the plurality of internal welding ribs are circumferentially spaced along the second through hole.

[0012] As a preferred technical solution of the ultrasonic welding structure, a first reinforcing rib is further provided on the bottom plate, and both ends of the first reinforcing rib extend towards the outer peripheral plate and the inner peripheral plate respectively.

[0013] As a preferred technical solution of the ultrasonic welding structure, a second reinforcing rib is further provided on the bottom plate. The second reinforcing rib is arranged in an arc structure. The second reinforcing rib is spaced from the inner peripheral plate. One end of the first reinforcing rib is connected to the outer peripheral plate, and the other end of the first reinforcing rib is connected to the second reinforcing rib.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The present utility model provides an ultrasonic welding structure. The structure inside the inner side of the outer peripheral plate is provided with a plurality of convex welded internal teeth, and the plurality of welded internal teeth are circumferentially spaced along the outer peripheral plate, thereby avoiding a large difference in the material thickness of the outer peripheral plate in the up and down directions and avoiding the phenomenon of thick and thin imprints during injection molding. At the same time, an external welding rib is provided at the outer contour of the cover plate for ultrasonic welding with the welded internal teeth. During the welding forming process, the external welding rib and the welded internal teeth are melted, and at the same time, the excess melted material is discharged between the two welded internal teeth, avoiding overflow and ensuring the appearance quality of the welded finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the ultrasonic welding structure after welding and assembly in the embodiment of the present utility model;

[0017] Figure 2 is a schematic diagram of the structure of the base in the embodiment of the present utility model;

[0018] Figure 3 Schematic diagram of the structure at the welded internal teeth of the base in the embodiment of the present utility model;

[0019] Figure 4 Schematic diagram of the structure of the cover plate in the embodiment of the present utility model.

[0020] In the figure:

[0021] 1. Base; 10. First through hole; 11. Bottom plate; 121. Outer peripheral plate; 122. Inner peripheral plate; 13. First reinforcing rib; 14. Second reinforcing rib; 15. Positioning sleeve; 16. Welded internal teeth; 160. Matching surface; 161. First edge; 162. Second edge; 163. Third edge; 17. Welded external teeth;

[0022] 2. Cover plate; 20. Second through hole; 21. Outer welding rib; 22. Inner welding rib; 23. Positioning post. Detailed implementation manners

[0023] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0027] As Figures 1-4 shown, the present utility model provides an ultrasonic welding structure, which is specifically a housing - type component, including a base 1 and a cover plate 2. After the base 1 and the cover plate 2 are assembled, a cavity is formed inside for assembling other functional components. In this embodiment, the ultrasonic welding structure is preferably the back shell of a mobile phone holder, and the inside is used to install a clamping member and a supporting member to clamp and fix a flat - plate object such as a mobile phone. The ultrasonic welding structure in this embodiment includes a base 1 and a cover plate 2. The peripheral plate 121 is located above the bottom plate 11 and is continuously arranged along the outer edge of the bottom plate 11. A plurality of welding internal teeth 16 are convexly arranged on the inner side of the peripheral plate 121, and the lower ends of the welding internal teeth 16 are connected to the bottom plate 11. The bottom plate 11, the peripheral plate 121, and the welding internal teeth 16 are integrally formed and connected, preferably manufactured by injection molding. The plurality of welding internal teeth 16 are circumferentially spaced along the peripheral plate 121. In this embodiment, the plurality of welding internal teeth 16 are preferably evenly distributed along the circumference of the peripheral plate 121. The outer contour shape of the cover plate 2 corresponds to the inner contour shape of the peripheral plate 121. An outer welding rib 21 is provided at the outer contour of the cover plate 2. The outer welding rib 21 is provided on the side of the cover plate 2 facing the welding internal teeth 16 and protrudes outward. The outer welding rib 21 is used for ultrasonic welding with the welding internal teeth 16. In the ultrasonic welding structure of this embodiment, the structure inside the peripheral plate 121 is set to have a plurality of convex welding internal teeth 16, and the plurality of welding internal teeth 16 are circumferentially spaced along the peripheral plate 121, thereby avoiding a large difference in the material thickness of the peripheral plate 121 in the up - and - down direction and avoiding the phenomenon of thick - thin marks during injection molding. At the same time, an outer welding rib 21 is provided at the outer contour of the cover plate 2 for ultrasonic welding with the welding internal teeth 16. During the welding forming process, the outer welding rib 21 and the welding internal teeth 16 are melted, and at the same time, the redundant melted material is discharged between the two welding internal teeth 16, avoiding overflow and ensuring the appearance quality of the welded finished product.

[0028] Further, please refer to Figure 4 As shown, a plurality of outer welding bones 21 are provided. The plurality of outer welding bones 21 are arranged at intervals along the outer contour of the cover plate 2. During the ultrasonic welding process, since the adjacent outer welding bones 21 are arranged at intervals, the melted material fills the gap between the adjacent two outer welding bones 21. While realizing the connection between the cover plate 2 and the base 1, the amount of redundant melted material is reduced, and the risk of overflow is further reduced, thereby further ensuring the appearance quality of the welded finished product.

[0029] Furthermore, please refer to Figures 1-4 As shown, in this embodiment, the outer contour shape of the base 1 is approximately rectangular. In other embodiments, it can also be set to other shapes. To facilitate the assembly of the cover plate 2 and the base 1 and ensure the assembly accuracy of the two, a positioning sleeve 15 is provided on the bottom plate 11, and a positioning post 23 for cooperating with the positioning sleeve 15 is provided on the side of the cover plate 2 facing the base 1. The cooperation between the positioning post 23 and the positioning sleeve 15 ensures the rapid assembly of the base 1 and the cover plate 2 and the assembly accuracy.

[0030] Optionally, to avoid misassembly or incorrect assembly by the operator during the assembly process, the number of positioning sleeves 15 in this embodiment is set to two, and the two positioning sleeves 15 are arranged diagonally on the bottom plate 11. Correspondingly, the number of positioning posts 23 on the cover plate 2 is also set to two, and the two positioning posts 23 are arranged diagonally on the cover plate 2. When assembling the cover plate 2 and the base 1, the two positioning posts 23 are respectively matched with the two positioning sleeves 15. Since the positioning posts 23 and the positioning sleeves 15 are arranged diagonally on both the cover plate 2 and the base 1, through the cooperation of the two sets of positioning posts 23 and positioning sleeves 15, the relative position relationship between the cover plate 2 and the base 1 is uniquely determined. Therefore, misassembly or incorrect assembly caused by operator errors can be effectively avoided during the assembly process.

[0031] It should be noted that since the base 1 and the cover plate 2 are prevented from being misassembled through the cooperation of two positioning posts 23 and two positioning sleeves 15, the processing accuracy requirements for the positioning posts 23 and the positioning sleeves 15 are relatively high during the assembly process, and problems such as incomplete assembly or assembly interference are likely to occur. For this reason, the positioning posts 23 and the positioning sleeves 15 in this embodiment are set to have a clearance fit, thereby reducing the processing accuracy requirements for the positioning posts 23 and / or the positioning sleeves 15 to a certain extent and making it easier for the two to be assembled in place.

[0032] Further, as shown in Figures 2-3As shown, a mating surface 160 is formed at the top of the welded internal gear 16. The mating surface 160 is disposed lower than the upper end surface of the peripheral plate 121, that is, the mating surface 160 and the upper end surface form a stepped shape. At least a part of the outer welding rib 21 is located within the mating surface 160 while there is a certain gap between the outer edge of the cover plate 2 and the inner side wall surface of the peripheral plate 121. Specifically, the mating surface 160 is a toothed surface having a first edge 161, a second edge 162, and a third edge 163. The distance between the first edge 161 and the inner side surface of the peripheral plate 121 is greater than the distance between the second edge 162 and the inner side surface of the peripheral plate 121, and the distance between the second edge 162 and the inner side surface of the peripheral plate 121 is greater than the distance between the third edge 163 and the inner side surface of the peripheral plate 121. In this embodiment, the first edge 161 is located at the connection position between the welded internal gear 16 and the peripheral plate 121, and the distance between it and the inner side surface of the peripheral plate 121 is 0 or equal to the fillet radius at the connection position. The second edge 162 is located at the bottom of the tooth of the welded internal gear 16, and the third edge 163 is located at the top of the tooth of the welded internal gear 16. During assembly, the cover plate 2 is placed on the base 1, and at the same time, the outer welding rib 21 overlaps the top of the welded internal gear 16 and both sides of the outer welding rib 21 are located between the first edge 161 and the third edge 163. During the welding process, the outer welding rib 21 and the welded internal gear 16 are melted. After welding, the edge of the cover plate 2 is located between the first edge 161 and the second edge 162 on the mating surface 160, so that the gap between the edge of the cover plate 2 and the inner side surface of the peripheral plate 121 is small, and the tooth top and tooth bottom of the welded internal gear 16 can be completely covered, improving the aesthetics of the product.

[0033] Furthermore, please refer to Figures 1-4As shown, an inner enclosure plate 122 is integrally formed and connected to the bottom plate 11, and the inner enclosure plate 122 is located above the bottom plate 11. The bottom plate 11 is provided with a first through hole 10 on the side of the inner enclosure plate 122 away from the outer enclosure plate 121, that is, the bottom plate 11 is provided with a first through hole 10 on the inner side of the inner enclosure plate 122, and the inner enclosure plate 122 is continuously provided on the bottom plate 11 along the edge of the first through hole 10. A plurality of welded external teeth 17 are protrudingly provided on the side of the inner enclosure plate 122 facing the outer enclosure plate 121, that is, on the outer side of the inner enclosure plate 122, and the plurality of welded external teeth 17 are distributed at intervals along the circumference of the outer enclosure plate 121. In this embodiment, the inner enclosure plate 122 is also provided with a matching structure for matching with other functional components. Therefore, in order to avoid interference, the welding external teeth 17 on the inner enclosure plate 122 are divided into multiple groups, each group includes a plurality of welding external teeth 17 uniformly distributed along the circumference of the inner enclosure plate 122, two adjacent groups are arranged at intervals, and the matching structure is arranged between the two adjacent groups of welding external teeth 17. Correspondingly, the cover plate 2 is provided with a second through hole 20 for aligning with the first through hole 10, and the cover plate 2 is provided with an inner welding bone 22 at the edge of the second through hole 20. The inner welding bone 22 is arranged on a side of the cover plate 2 facing the welding external teeth 17 and protrudes outward, and the inner welding bone 22 is used for ultrasonic welding with the welding external teeth 17. In this way, while strengthening the structural strength of the ultrasonic welding between the cover plate 2 and the base 1, the problem of material overflow can also be avoided. The relevant principles and implementation methods are the same or similar to the part of the ultrasonic welding of the outer welding bone 21 and the welding internal teeth 16 in this embodiment, so they are not repeated here.

[0034] Optionally, see Figure 4 As shown, multiple inner welding bones 22 are provided, and multiple inner welding bones 22 are arranged at intervals along the circumference of the second through hole 20. During the ultrasonic welding process, since the adjacent inner welding bones 22 are arranged at intervals, the melted material fills the gap between two adjacent inner welding bones 22, and while realizing the connection between the cover plate 2 and the base 1, the amount of excess melted material is reduced, and the risk of overflow is further reduced, thereby further ensuring the appearance quality of the finished product after welding. At the same time, since a large interval is provided between each group of welding external teeth 17 on the inner enclosure plate 122, in order to avoid material waste, the inner welding bones 22 are not provided at the position opposite to it on the cover plate 2, that is, the inner welding bones 22 are only provided at intervals on the cover plate 2 in the area corresponding to the base 1 where the welding external teeth 17 are provided.

[0035] Alternatively, if Figures 2-3 As shown, a first reinforcing rib 13 is further provided on the bottom plate 11, and the two ends of the first reinforcing rib 13 extend toward the outer plate 121 and the inner plate 122 respectively. The number of the first reinforcing ribs 13 is set to be multiple, and the multiple first reinforcing ribs 13 are arranged at intervals along the first through hole 10. By providing the first reinforcing ribs 13, the structural strength of the bottom plate 11 is strengthened.

[0036] Optionally, please continue to refer toFigures 2-3 As shown, a second reinforcing rib 14 is further provided on the bottom plate 11. The second reinforcing rib 14 is arranged in an arc structure. The second reinforcing rib 14 is arranged at an interval from the inner peripheral plate 122. One end of the first reinforcing rib 13 is connected to the outer peripheral plate 121, and the other end of the first reinforcing rib 13 is connected to the second reinforcing rib 14, thereby further enhancing the structural strength of the bottom plate 11. It can be understood that at the position where the first reinforcing rib 13 is connected to the outer peripheral plate 121, the welded internal teeth 16 at this corresponding position are replaced by the first reinforcing rib 13, ensuring that there is enough space on both sides at the connection position of the first reinforcing rib 13 and the outer peripheral plate 121 to discharge the excess molten material, and avoiding the situation of local overflow at the connection position of the first reinforcing rib 13 and the outer peripheral plate 121.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Ultrasonic welding structure, characterized in that: It comprises a base (1) and a cover plate (2); The base (1) comprises a bottom plate (11) and an outer plate (121), wherein the outer plate (121) is located above the bottom plate (11), and a plurality of welded internal teeth (16) are protrudingly provided on the inner side of the outer plate (121), wherein the bottom plate (11), the outer plate (121) and the welded internal teeth (16) are integrally formed and connected, and the plurality of welded internal teeth (16) are distributed at intervals along the circumference of the outer plate (121); An external welding bone (21) is provided at the outer contour of the cover plate (2), and the external welding bone (21) is used for ultrasonic welding with the welding internal teeth (16).

2. The ultrasonic welding structure according to claim 1, characterized in that: The external welding bones (21) are arranged in plurality, and the plurality of external welding bones (21) are arranged at intervals along the outer contour of the cover plate (2).

3. The ultrasonic welding structure according to claim 1, characterized in that: A positioning sleeve (15) is provided on the bottom plate (11), and a positioning column (23) for cooperating with the positioning sleeve (15) is provided on the cover plate (2).

4. The ultrasonic welding structure according to claim 3, characterized in that: There are two positioning sleeves (15) and the two positioning sleeves (15) are arranged diagonally on the bottom plate (11). There are two positioning posts (23) and the two positioning posts (23) are matched with the two positioning sleeves (15) respectively.

5. The ultrasonic welding structure according to claim 4, characterized in that: The positioning column (23) and the positioning sleeve (15) are clearance-matched.

6. The ultrasonic welding structure according to claim 1, characterized in that: A mating surface (160) is formed at the top of the welding inner tooth (16), and at least a portion of the outer welding bone (21) is located within the mating surface (160). The mating surface (160) has a first edge (161), a second edge (162) and a third edge (163). The distance between the first edge (161) and the inner side surface of the outer plate (121) is greater than the distance between the second edge (162) and the inner side surface of the outer plate (121). The distance between the second edge (162) and the inner side surface of the outer plate (121) is greater than the distance between the third edge (163) and the inner side surface of the outer plate (121). The edge of the cover plate (2) is located between the first edge (161) and the second edge (162) on the mating surface (160).

7. The ultrasonic welding structure according to claim 1, characterized in that: The bottom plate (11) is also integrally formed with an inner peripheral plate (122), and the bottom plate (11) is provided with a first through hole (10) on a side of the inner peripheral plate (122) facing away from the outer peripheral plate (121), and a plurality of welding external teeth (17) are protrudingly provided on a side of the inner peripheral plate (122) facing the outer peripheral plate (121), and the plurality of welding external teeth (17) are distributed at intervals along the circumference of the outer peripheral plate (121), and the cover plate (2) is provided with a second through hole (20) for aligning with the first through hole (10), and the cover plate (2) is provided with an inner welding bone (22) at the edge of the second through hole (20), and the inner welding bone (22) is used for ultrasonic welding with the welding external teeth (17).

8. The ultrasonic welding structure according to claim 7, characterized in that: The inner welding bones (22) are provided in plurality, and the plurality of inner welding bones (22) are arranged at intervals along the circumference of the second through hole (20).

9. The ultrasonic welding structure according to claim 7, characterized in that: A first reinforcing rib (13) is also provided on the bottom plate (11), and two ends of the first reinforcing rib (13) extend toward the outer plate (121) and the inner plate (122) respectively.

10. The ultrasonic welding structure according to claim 9, characterized in that: A second reinforcing rib (14) is also provided on the bottom plate (11); the second reinforcing rib (14) is provided as an arc-shaped structure; the second reinforcing rib (14) is spaced apart from the inner enclosure plate (122); one end of the first reinforcing rib (13) is connected to the outer enclosure plate (121); and the other end of the first reinforcing rib (13) is connected to the second reinforcing rib (14).

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