Light guide plate assembly and ultrasonic tool

Abstract

The utility model relates to the technical field of light guide plate provides a light guide plate subassembly and ultrasonic tool, light guide plate subassembly includes apron and light guide plate, apron is located the top of light guide plate, apron is close to the side of light guide plate and is equipped with the bone position, the side of light guide plate close to apron is equipped with the slot position, and the bone position is located in the slot position and is fixed through ultrasonic welding.A kind of ultrasonic tool, including above-mentioned light guide plate subassembly, still include the ultrasonic lower mould, support base and ultrasonic upper mould that are sequentially arranged, support base is set in the top of ultrasonic lower mould, light guide plate subassembly is placed in the placement slot of support base, and ultrasonic upper mould is located the top of light guide plate subassembly.It is connected after the apron and light guide plate of light guide plate subassembly include by the limiting cooperation of bone position and slot position, and then ultrasonic welding is carried out, so that light guide plate meets the requirement of normal light guide under, apron and light guide plate welding are more firm, uniform, and connection structure is simplified, and connection mode is simple, and assembly disassembly is more convenient and flexible when using.

Description

Technical Field

[0001] This utility model relates to the technical field of light guide plates, and more specifically, to a light guide plate assembly and an ultrasonic jig. Background Technology

[0002] Light guide plate assemblies are widely used in commercial video equipment. Their main function is to amplify the light source signal indication around the equipment, while also allowing the signal to be seen from the front through a cover plate, enabling the signal to be visible from different directions. Current technology typically uses heat-fused light guide pillars for fixing light guide plate assemblies. However, the structure of these pillars affects light transmission; the heat-fused mushroom-shaped structure impacts space constraints and assembly with other components. Furthermore, heat fusion limits the length of the light guide pillars, and given the thinness of the light guide plate, heat fusion structures are difficult to implement. Utility Model Content

[0003] The purpose of this utility model is to provide a light guide plate assembly and an ultrasonic fixture to solve the technical problems in the prior art where the light guide plate assembly is fixed by a hot-melt light guide column. The structure of the light guide column affects the light transmission effect, the hot-melt mushroom head structure affects the space and assembly of the parts, and the hot-melt method limits the length of the light guide column. The light guide plate is relatively thin, and the hot-melt structure is difficult to meet the technical requirements.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a light guide plate assembly, including a cover plate and a light guide plate. The cover plate is located above the light guide plate. The side of the cover plate near the light guide plate is provided with a rib, and the side of the light guide plate near the cover plate is provided with a groove. The rib is located in the groove and is fixed by ultrasonic welding.

[0006] According to the light guide plate assembly described above, the height of the rib is greater than the depth of the slot, and the width of the slot is greater than the width of the rib.

[0007] According to the light guide plate assembly described above, the cross-sectional shape of the bone position is trapezoidal, and the cross-sectional shape of the groove position is trapezoidal.

[0008] According to the light guide plate assembly described above, the bone position is surrounded by the cover plate near its edge, and the bone position includes a first bone position segment and a second bone position segment, the first bone position segment and the second bone position segment being spaced apart;

[0009] The slot is located near the edge of the light guide plate, and the slot includes a first slot segment and a second slot segment, which are spaced apart.

[0010] According to the light guide plate assembly described above, the cover plate is provided with at least one positioning post, the light guide plate is provided with a corresponding positioning hole, and the positioning post is disposed in the positioning hole and is limited and engaged with the positioning hole.

[0011] According to the light guide plate assembly described above, the cover plate is provided with two positioning posts, and the two positioning posts are arranged diagonally; the light guide plate is provided with two positioning holes, and the two positioning holes are arranged diagonally.

[0012] According to the light guide plate assembly described above, the cover plate is provided with multiple grooves, and the multiple grooves are spaced apart.

[0013] On the other hand, this utility model also provides an ultrasonic fixture, including the light guide plate assembly described above, and further including an ultrasonic lower mold, a support base and an ultrasonic upper mold arranged in sequence. The support base is disposed above the ultrasonic lower mold, the light guide plate assembly is placed in the placement groove of the support base, and the ultrasonic upper mold is located above the light guide plate assembly.

[0014] According to the ultrasonic fixture described above, the placement groove of the support base is provided with a clearance position, and the side of the light guide plate away from the cover plate is provided with a fastening position. The light guide plate is placed in the placement groove of the support base, and the fastening position is located in the clearance position.

[0015] According to the ultrasonic fixture described above, the cross-sectional dimension of the upper half of the ultrasonic upper mold is larger than the cross-sectional dimension of the lower half of the ultrasonic upper mold, and the cross-sectional dimension of the lower half of the ultrasonic upper mold is larger than the outer dimension of the light guide plate assembly and smaller than the outer dimension of the support base.

[0016] The beneficial effects of the light guide plate assembly and ultrasonic fixture provided by this utility model are at least as follows:

[0017] The light guide plate assembly and ultrasonic fixture provided by this utility model include a cover plate and a light guide plate, which are matched and positioned by ribs and slots, and then ultrasonically welded together. This makes the weld between the cover plate and the light guide plate more robust and uniform while meeting the requirements of normal light guiding, and simplifies the connection structure. The connection method is simple, and assembly and disassembly are more convenient and flexible during use. Ultrasonic welding provides more design space for appearance parts without affecting the assembly of other parts; it allows for different shapes of the light guide plate to be designed according to the application scenario, without size limitations; it allows for thinner light guide plates to cope with different application scenarios; and it allows for the procurement of ultrasonic welding to meet the product requirements of appearance parts, resulting in more high-end products. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 An exploded view of the light guide plate assembly provided for the utility model;

[0020] Figure 2 A schematic diagram of the cover plate provided for the utility model;

[0021] Figure 3 Schematic diagram of the light guide plate provided for the utility model Figure 1 ;

[0022] Figure 4 Schematic diagram of the light guide plate provided for the utility model Figure 2 ;

[0023] Figure 5 A schematic diagram of the structure of the ultrasonic fixture provided for the utility model;

[0024] Figure 6 An exploded structural diagram of the ultrasonic fixture provided for the utility model.

[0025] The following are the labeling elements in the figure:

[0026] 1000, Ultrasonic jig; 100, Light guide plate assembly; 10, Cover plate; 11, Bone position; 111, First bone position segment; 112, Second bone position segment; 12, Positioning post; 20, Light guide plate; 21, Slot; 211, First slot segment; 212, Second slot segment; 22, Positioning hole; 23, Clip; 200, Ultrasonic lower mold; 300, Support base; 310, Placement slot; 320, Clearance; 400, Ultrasonic upper mold; 410, Through hole. Detailed Implementation

[0027] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0028] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0029] Please see Figures 1 to 3 This embodiment provides a light guide plate assembly 100, including a cover plate 10 and a light guide plate 20. The cover plate 10 is located above the light guide plate 20. A rib 11 is provided on the side of the cover plate 10 near the light guide plate 20, and a groove 21 is provided on the side of the light guide plate 20 near the cover plate 10. The rib 11 is disposed within the groove 21 and is fixed by ultrasonic welding to connect the cover plate 10 and the light guide plate 20. Optionally, the cover plate 10 is made of PC / ASA material. Optionally, the light guide plate 20 is made of transparent PC material with a light transmittance of not less than 88%.

[0030] The beneficial effects of the light guide plate assembly 100 provided in this embodiment are as follows:

[0031] (1) The light guide plate assembly 100 provided in this embodiment includes a cover plate 10 and a light guide plate 20 which are limited by the rib position 11 and the slot position 21 and then ultrasonically welded together. This makes the cover plate 10 and the light guide plate 20 more firmly and evenly welded while meeting the requirements of normal light guiding. It also simplifies the connection structure and the connection method is simple. It is more convenient and flexible to assemble and disassemble during use.

[0032] (2) Ultrasonic welding provides more design space for exterior parts without affecting the assembly of other parts; ultrasonic welding allows for different shapes of the light guide plate according to the usage scenario, and is not limited by size; ultrasonic welding allows for thinner light guide plate designs to meet different application scenarios; purchasing ultrasonic welding can meet the product usage requirements of exterior parts, making the products more high-end.

[0033] In one embodiment, the height of the rib 11 is greater than the depth of the groove 21, and the width of the groove 21 is greater than the width of the rib 11. By setting the height of the rib 11 to be greater than the depth of the groove 21, a portion of the rib 11 will melt during ultrasonic welding, eventually making the height of the rib 11 equal to the depth of the groove 21, thus stably welding the cover plate 10 onto the light guide plate 20, resulting in a more robust weld.

[0034] In one embodiment, the width of the groove 21 is 0.5mm to 1mm, the depth is 0.2mm to 0.4mm, and the width of the bone position 11 is 0.2mm to 0.7mm, and the height is 0.4mm to 0.8mm. In another embodiment, the width of the groove 21 is 0.8mm, the depth is 0.25mm, and the width of the bone position 11 is 0.5mm, and the height is 0.6mm. It should be understood that the width, depth, and height of the groove 21, bone position 11 are not limited to the above-described cases and may be other cases, which are not limited here.

[0035] In one embodiment, the cross-sectional shape of the bone position 11 is trapezoidal, and the cross-sectional shape of the slot 21 is trapezoidal. Setting both the cross-sectional shapes of the bone position 11 and the slot 21 to trapezoidal facilitates the quick and accurate insertion of the bone position 11 into the slot 21.

[0036] In one embodiment, see Figure 2 The bone segment 11 is disposed around the cover plate 10 near its edge, and the bone segment 11 includes a first bone segment 111 and a second bone segment 112, which are spaced apart. (See also...) Figure 3 The slot 21 is arranged around the light guide plate 20 near its edge, and the slot 21 includes a first slot segment 211 and a second slot segment 212, which are spaced apart. The spaced arrangement of the first slot segment 211 and the second slot segment 212 and the first slot segment 211 and the second slot segment 212 ensures that the cover plate 10 and the light guide plate 20 are in an unsealed state after being pressed together, which is beneficial for venting during ultrasonic welding.

[0037] In one embodiment, see Figure 2 and Figure 3 The cover plate 10 is provided with at least one positioning post 12, and the light guide plate 20 is provided with a corresponding positioning hole 22. The positioning post 12 is disposed in the positioning hole 22 and is limitedly engaged with the positioning hole 22. The positioning post 12 and the positioning hole 22 facilitate the positioning and connection of the cover plate 10 to the light guide plate 20.

[0038] In one embodiment, please continue reading Figure 2 and Figure 3 The cover plate 10 is provided with two positioning posts 12, which are arranged diagonally. The light guide plate 20 is provided with two positioning holes 22, which are also arranged diagonally. The diagonal arrangement of the two positioning holes 22 facilitates the assembly of the cover plate 10 and the light guide plate 20, and prevents displacement after assembly, resulting in greater stability during ultrasonic welding.

[0039] Optionally, the positioning post 12 is a frustum. Setting the positioning post 12 as a frustum facilitates quick and accurate positioning of the positioning post 12 into the positioning hole 22.

[0040] In one embodiment, the diameter of the positioning hole 22 is 2mm to 3mm, and the diameter of the positioning pin 12 is 1.95mm to 2.95mm. In another embodiment, the diameter of the positioning hole 22 is 2.5mm, and the diameter of the positioning pin 12 is 2.45mm. It should be understood that the diameters of the positioning hole 22 and the positioning pin 12 are not limited to the above-described cases, and may be other cases, which are not limited here.

[0041] In one embodiment, the cover plate 10 has multiple grooves (not shown in the figure, the same below), and the multiple grooves are spaced apart. The spaced grooves help to reduce shrinkage marks by removing excess adhesive.

[0042] Please see Figures 5 to 6 This embodiment also provides an ultrasonic fixture 1000, including the aforementioned light guide plate assembly 100, and further including an ultrasonic lower mold 200, a support base 300, and an ultrasonic upper mold 400 arranged sequentially. The support base 300 is disposed above the ultrasonic lower mold 200, the light guide plate assembly 100 is placed in the placement groove 310 of the support base 300, and the ultrasonic upper mold 400 is located above the light guide plate assembly 100. Since the light guide plate assembly 100 has been described in detail above, it will not be repeated here. After assembling the light guide plate assembly 100, it is placed in the placement groove 310 of the support base 300, and then the cover plate 10 and the light guide plate 20 are ultrasonically welded together by the ultrasonic lower mold 200 and the ultrasonic upper mold 400. The support base 300 has a shock-absorbing function, and the material of the support base 300 is a mixed adhesive.

[0043] The ultrasonic welding process is as follows: Set the welding time to 0.4 seconds and the hardening time to 0.4 seconds; set the delay time to 0.8 seconds, the equipment air pressure to 0.6 MPa, and the welding amplitude to 50 μm; assemble the light guide plate 20 and the cover plate 10 using the positioning pins 12 and positioning holes 22, ensuring they are assembled in the correct positions; place the light guide plate assembly 100 into the ultrasonic fixture 1000, and place a protective film on the cover plate 10 to protect its appearance; close the ultrasonic fixture 1000, perform ultrasonic welding for 0.8 seconds, and set the air pressure to 0.6 MPa; open the ultrasonic fixture 1000, remove the product, and remove the protective film from the product; check if the product's perimeter is ultrasonically aligned, and use a feeler gauge to check if the gap exceeds 0.1 mm; check if the light transmittance of the product's light guide plate 20 is ≥88%; place the light guide plate assembly 100 into the designated suction cup.

[0044] In one embodiment, see Figure 6 The support base 300 has a clearance space 320 in the placement groove 310, and the light guide plate 20 has a fastener 23 on the side away from the cover plate 10 (e.g. Figure 4 As shown, when the light guide plate 20 is placed in the placement groove 310 of the support base 300, the fastener 23 is positioned in the clearance space 320. By providing the clearance space 320 on the support base 300, when the light guide plate assembly 100 is placed on the support base 300, the fastener 23 on the light guide plate 20 is positioned within the clearance space 320, preventing the fastener 23 of the light guide plate 20 from breaking due to vibration during superconductivity, effectively protecting the product's appearance and dimensional accuracy.

[0045] In one embodiment, see Figure 6 The cross-sectional dimension of the upper half of the ultrasonic upper mold 400 is larger than that of the lower half of the ultrasonic upper mold 400. The cross-sectional dimension of the lower half of the ultrasonic upper mold 400 is larger than the overall dimensions of the light guide plate assembly 100 but smaller than the overall dimensions of the support base 300. Setting the ultrasonic upper mold 400 to be larger at the top and smaller at the bottom allows the ultrasonic upper mold 400 to concentrate the force more evenly on the light guide plate assembly 100, facilitating more powerful ultrasonic pressing and resulting in more stable welding.

[0046] Optional, please refer to Figure 6 The ultrasonic upper mold 400 is also provided with through holes 410. The through holes 410 can reduce the weight of the ultrasonic upper mold 400 and also help to distribute the force evenly. Optionally, the ultrasonic upper mold 400 is also provided with two through holes 410. It should be understood that the number of through holes 410 is not limited to the above situation, and there can be other situations, which are not limited here.

[0047] In summary, this embodiment provides a light guide plate assembly 100, including a cover plate 10 and a light guide plate 20. The cover plate 10 is located above the light guide plate 20. A rib 11 is provided on the side of the cover plate 10 near the light guide plate 20, and a groove 21 is provided on the side of the light guide plate 20 near the cover plate 10. The rib 11 is located within the groove 21 and is fixed by ultrasonic welding to connect the cover plate 10 and the light guide plate 20. This embodiment also provides an ultrasonic jig 1000, including the aforementioned light guide plate assembly, and further including a lower ultrasonic mold 200, a support base 300, and an upper ultrasonic mold 400 arranged sequentially. The support base 300 is located above the lower ultrasonic mold 200, the light guide plate assembly 100 is placed in a placement groove 310 of the support base 300, and the upper ultrasonic mold 400 is located above the light guide plate assembly 100. The light guide plate assembly 100 and ultrasonic fixture 100 provided in this embodiment include a cover plate 10 and a light guide plate 20, which are matched by a rib 11 and a groove 21 and then ultrasonically welded together. This makes the weld between the cover plate 10 and the light guide plate 20 more robust and uniform while meeting the requirements of normal light guiding, and simplifies the connection structure. The connection method is simple, and assembly and disassembly are more convenient and flexible during use. Ultrasonic welding provides more space for the design of appearance parts without affecting the assembly of the parts; it allows for the design of different shapes of the light guide plate according to the usage scenario, without size limitations; it allows for the design of thinner light guide plates to cope with different application scenarios; and it allows for the procurement of ultrasonic welding to meet the usage requirements of appearance parts, resulting in more high-end products.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A light guide plate assembly, characterized in that, It includes a cover plate and a light guide plate. The cover plate is located above the light guide plate. The side of the cover plate near the light guide plate has a rib. The side of the light guide plate near the cover plate has a groove. The rib is located in the groove and is fixed by ultrasonic welding.

2. The light guide plate assembly according to claim 1, characterized in that, The height of the bone position is greater than the depth of the groove, and the width of the groove is greater than the width of the bone position.

3. The light guide plate assembly according to claim 1, characterized in that, The cross-sectional shape of the bone position is trapezoidal, and the cross-sectional shape of the groove position is trapezoidal.

4. The light guide plate assembly according to claim 1, characterized in that, The bone position is surrounded by the cover plate near its edge, and the bone position includes a first bone position segment and a second bone position segment, which are spaced apart. The slot is located near the edge of the light guide plate, and the slot includes a first slot segment and a second slot segment, which are spaced apart.

5. The light guide plate assembly according to claim 1, characterized in that, The cover plate is provided with at least one positioning post, and the light guide plate is provided with a corresponding positioning hole. The positioning post is located in the positioning hole and is limited and matched with the positioning hole.

6. The light guide plate assembly according to claim 5, characterized in that, The cover plate is provided with two positioning posts, which are arranged diagonally; the light guide plate is provided with two positioning holes, which are arranged diagonally.

7. The light guide plate assembly according to claim 1, characterized in that, The cover plate has multiple grooves, and the multiple grooves are spaced apart.

8. An ultrasonic fixture, characterized in that, The light guide plate assembly according to any one of claims 1 to 7 further includes an ultrasonic lower mold, a support base, and an ultrasonic upper mold arranged sequentially, wherein the support base is disposed above the ultrasonic lower mold, the light guide plate assembly is placed in the placement groove of the support base, and the ultrasonic upper mold is located above the light guide plate assembly.

9. The ultrasonic fixture according to claim 8, characterized in that, The support base has a clearance space in its placement groove, and the light guide plate has a fastener on the side away from the cover plate. The light guide plate is placed in the placement groove of the support base, and the fastener is located in the clearance space.

10. The ultrasonic fixture according to claim 8, characterized in that, The cross-sectional dimension of the upper half of the ultrasonic upper mold is larger than that of the lower half of the ultrasonic upper mold, and the cross-sectional dimension of the lower half of the ultrasonic upper mold is larger than the outer dimensions of the light guide plate assembly but smaller than the outer dimensions of the support base.

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