Touch panel
By designing the protrusions on the metal shrapnel of the touch panel to increase the contact area and fixing them with the adhesive backing layer, the problem of unstable contact between the metal shrapnel and the ground surface in the prior art is solved, and good grounding effect is achieved and saving cost.
Patent Information
- Application Number
- CN202410628986.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-08-14
- Filing Date
- 2024-05-21
- Publication Date
- 2025-02-21
AI Technical Summary
In the existing touch panels, the contact between the metal shrapnel and the grounding surface is unstable, which easily affects the grounding effect due to the offset of the position of the manually attached conductive cloth, and the cost of manually attached conductive cloth is relatively high.
Design the protrusions of the metal shrapnel to increase the contact area with the ground surface and fix them with the circuit board through the adhesive backing layer to avoid the use of conductive cloth.
By increasing the contact area of the convex part of the metal shrapnel, the contact effect between the metal shrapnel and the ground surface is improved, the position deviation problem of manually attaching the conductive cloth is avoided, and the cost is greatly saved.
Smart Images
Figure CN119493481A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a touch panel, and in particular to a touch panel with a circuit board. Background Art
[0002] Recently, people's demand for the use of touch panels has gradually increased. Touch panels usually include metal parts and circuit boards. In order to make the metal spring of the metal part contact the grounding area of the circuit board, a conductive patch is usually manually attached to the metal spring for fixing. However, the manual attachment of the conductive patch may cause positional deviation, which will affect the grounding effect, and the manual attachment of the conductive patch is costly. Summary of the invention
[0003] The present invention relates to a touch panel. The convex part design of the metal spring in the touch panel can increase the contact area between the convex part and the grounding surface, further improve the contact between the metal spring and the grounding surface, and do not use conductive cloth to fix the metal spring, which can greatly save costs.
[0004] According to one embodiment of the present invention, a touch panel is provided. The touch panel includes a circuit board and a metal member. The metal member is disposed on the circuit board, and the circuit board includes a ground plane. The metal member includes a metal spring, and the position of the metal spring corresponds to the ground plane. The metal spring includes a convex portion, and the convex portion contacts the ground plane.
[0005] In some embodiments, the metal member has a first opening, the position of the first opening corresponds to the ground plane, and the metal spring is connected to the metal member and protrudes from the first opening.
[0006] In some embodiments, the touch panel further includes an adhesive layer, and the metal piece is adhered to the circuit board through the adhesive layer.
[0007] In some embodiments, the adhesive layer is disposed between the circuit board and the metal component.
[0008] In some embodiments, the adhesive layer has a second opening, and the second opening corresponds to the first opening.
[0009] In some embodiments, the metal spring further includes a flat portion, the flat portion is connected to the convex portion, and a thickness of the convex portion is greater than a thickness of the flat portion.
[0010] In some embodiments, the metal member is stacked on the circuit board along a first direction, and the metal spring at least partially overlaps the ground plane in the first direction.
[0011] In some embodiments, the protrusion overlaps the ground plane in the first direction.
[0012] In some embodiments, the metal member further includes a frame body.
[0013] In order to better understand the above and other aspects of the present invention, embodiments are given below and described in detail with reference to the accompanying drawings: BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1A is an exploded view of a touch panel according to an embodiment of the present invention;
[0015] Figure 1B for Figure 1A A top view of the center touchpad;
[0016] Figure 1C for Figure 1B The cross-section of the D-D' connection;
[0017] Figure 2 is a top view of a touch panel according to another embodiment of the present invention;
[0018] Figure 3 is a top view of a touch panel according to yet another embodiment of the present invention;
[0019] Figure 4 FIG. 4 is a top view of a touch panel according to another embodiment of the present invention. DETAILED DESCRIPTION
[0020] The following will describe in detail various embodiments of the present invention, and will be illustrated with the accompanying drawings. In addition to these detailed descriptions, the present invention can also be widely implemented in other embodiments, and any easy replacement, modification, and equivalent changes of the embodiments are included in the scope of the present invention and are subject to the claims. In the description of the specification, in order to enable the reader to have a more complete understanding of the present invention, many specific details and implementation examples are provided; however, these specific details and implementation examples should not be regarded as limitations of the present invention. In addition, well-known steps or components are not described in detail to avoid unnecessary limitations of the present invention.
[0021] Figure 1A FIG. 1 is an exploded view of a touch panel 10 according to an embodiment of the present invention. Figure 1B for Figure 1A A top view of the middle touch panel 10. Figure 1C for Figure 1B Cross-sectional view of the D-D' connection.
[0022] Please refer to Figure 1A, the touch panel 10 includes a circuit board 110, an adhesive layer 120 and a metal member 130. The metal member 130 is disposed on the circuit board 110, and the adhesive layer 120 is disposed between the circuit board 110 and the metal member 130. The adhesive layer 120 and the metal member 130 are, for example, stacked on the circuit board 110 along the first direction D1. That is, the circuit board 110, the adhesive layer 120 and the metal member 130 may overlap with each other in the first direction D1. In the present embodiment, the metal member 130 is adhered to the circuit board 110 through the adhesive layer 120, but the present invention is not limited to this. In other embodiments, the circuit board 110 and the metal member 130 may be fixed to each other through a snap-fit structure (not shown) or other suitable structures. The metal member 130 can be used to support the circuit board 110. The material of the metal member 130 is, for example, stainless steel, but the present invention is not limited to this. In some embodiments, the number of metal members 130 may be multiple (not shown).
[0023] like Figure 1A-1B As shown, the circuit board 110 includes integrated circuits 112 and 114 and a ground plane 110G. The ground plane 110G can be used to solve the problem of electrostatic discharge (ESD). In this embodiment, the ground plane 110G is adjacent to the integrated circuit 114, and the number of integrated circuits is 2. However, the present invention is not limited to this. In other embodiments, the ground plane 110G can be adjacent to the integrated circuit 112, the number of ground planes 110G can be 2 or more than 2, and the number of integrated circuits can be less than or greater than 2. Please refer to Figures 1B to 1CThe metal component 130 includes a metal spring 132, and the position of the metal spring 132 corresponds to the ground plane 110G, for example, at least partially overlaps the ground plane 110G in the first direction D1. The metal component 130 has a first opening 134H, and the adhesive layer 120 has a second opening 120H, and the second opening 120H corresponds to the first opening 134H, for example, overlaps in the first direction D1. Moreover, the positions of the first opening 134H and the second opening 120H correspond to the ground plane 110G. The metal spring 132 is connected to the metal component 130 and protrudes from the first opening 134H. According to one embodiment, the metal component 130 further includes a frame body 134, and the metal spring 132 is connected to the frame body 134. The metal spring 132 extends between the ground plane 110G and the frame body 134, that is, the extension direction of the metal spring 132 is, for example, parallel to the third direction D3. The portion of the metal spring 132 corresponding to the ground plane 110G is the end portion, and the portion between the frame body 134 and the end portion is the middle portion. The width W1 of the end portion of the metal spring 132 in the second direction D2 is greater than the width W2 of the middle portion of the metal spring 132 in the second direction D2. The first direction D1, the second direction D2, and the third direction D3 may be perpendicular to each other, but the present invention is not limited thereto. In the present embodiment, the number of the metal springs 132 is 1, but the present invention is not limited thereto, and in other embodiments, the number of the metal springs 132 may be greater than 1. In some embodiments, the touch panel 10 has 2 ground planes and 2 metal springs, and the metal springs correspond to different ground planes (not shown).
[0024] like Figures 1B to 1C As shown, the metal spring 132 includes a flat portion 132F and a convex portion 132T, the flat portion 132F is connected to the convex portion 132T, and the thickness T1 of the convex portion 132T (for example, the thickness in the first direction D1) is greater than the thickness T2 of the flat portion 132F (for example, the thickness in the first direction D1). The convex portion 132T overlaps with the ground plane 110G in the first direction D1 and contacts the ground plane 110G. In other words, the metal spring 132 is physically and electrically in contact with the ground plane 110G through the convex portion 132T. Since the backing layer 120 has a second opening 120H, the second opening 120H corresponds to the first opening 134H and the metal spring 132 protrudes from the first opening 134H, there are no other components between the metal spring 132 and the convex portion 132T and the ground plane 110G, and the metal spring 132 and the convex portion 132T are physically and electrically in contact with the ground plane 110G. In this embodiment, by Figure 1BFrom the top view shown, the protrusion 132T includes 9 circular protrusions, but the shape of the protrusion 132T of the present invention is not limited thereto. Compared with the comparative example in which the metal spring has only a flat portion but no protrusion, since the metal spring 132 in one embodiment of the present invention includes the protrusion 132T, the contact area between the metal spring 132 and the grounding surface 110G can be strengthened. Even if the metal spring 132 is scratched or uneven over time, the protrusion 132T of the metal spring 132 can maintain good and consistent electrical contact with the grounding surface 110G, so a good grounding effect can be achieved.
[0025] Figure 2 FIG. 2 is a top view of a touch panel 20 according to another embodiment of the present invention. The touch panel 20 is similar to the touch panel 10. One of the differences between the touch panel 20 and the touch panel 10 is that the shape of the protrusion 232T of the metal spring 232 is different. Other similarities or differences will not be described in detail.
[0026] Please refer to Figure 2 The metal part 230 includes a metal spring 232. The position of the metal spring 232 corresponds to the ground plane 110G. The metal spring 232 includes a flat portion 232F and a convex portion 232T. The flat portion 232F is connected to the convex portion 232T. The thickness of the convex portion 232T (for example, the thickness in the first direction D1) is greater than the thickness of the flat portion 232F (for example, the thickness in the first direction D1). The convex portion 232T overlaps the ground plane 110G in the first direction D1 and contacts the ground plane 110G. In other words, the metal spring 232 is physically and electrically in contact with the ground plane 110G through the convex portion 232T. In this embodiment, Figure 2 From the top view shown, the protrusion 232T includes three long strip-shaped protrusions, but the shape of the protrusion 232T of the present invention is not limited thereto.
[0027] Figure 3 FIG. 3 is a top view of a touch panel 30 according to another embodiment of the present invention. The touch panel 30 is similar to the touch panel 10. One of the differences between the touch panel 30 and the touch panel 10 is that the shape of the protrusion 332T of the metal spring 332 is different. Other similarities or differences will not be described in detail.
[0028] Please refer to Figure 3The metal part 330 includes a metal spring 332. The position of the metal spring 332 corresponds to the ground plane 110G. The metal spring 332 includes a flat portion 332F and a convex portion 332T. The flat portion 332F is connected to the convex portion 332T. The thickness of the convex portion 332T (for example, the thickness in the first direction D1) is greater than the thickness of the flat portion 332F (for example, the thickness in the first direction D1). The convex portion 332T overlaps the ground plane 110G in the first direction D1 and contacts the ground plane 110G. In other words, the metal spring 332 is physically and electrically in contact with the ground plane 110G through the convex portion 332T. In this embodiment, Figure 3 From the top view shown, the protrusion 332T includes a block-shaped protrusion, but the shape of the protrusion 332T of the present invention is not limited thereto.
[0029] Figure 4 FIG. 4 is a top view of a touch panel 40 according to another embodiment of the present invention. The touch panel 40 is similar to the touch panel 10. One of the differences between the touch panel 40 and the touch panel 10 is that the shape of the protrusion 432T of the metal spring 432 is different. Other similarities or differences will not be described in detail.
[0030] Please refer to Figure 4 The metal part 430 includes a metal spring 432. The position of the metal spring 432 corresponds to the ground plane 110G. The metal spring 432 includes a flat portion 432F and a convex portion 432T. The flat portion 432F is connected to the convex portion 432T. The thickness of the convex portion 432T (for example, the thickness in the first direction D1) is greater than the thickness of the flat portion 432F (for example, the thickness in the first direction D1). The convex portion 432T overlaps the ground plane 110G in the first direction D1 and contacts the ground plane 110G. In other words, the metal spring 432 is physically and electrically in contact with the ground plane 110G through the convex portion 432T. In this embodiment, Figure 4 From the top view shown, the protrusion 432T includes two sheet-shaped protrusions, but the shape of the protrusion 432T of the present invention is not limited thereto.
[0031] It should be understood that the convex portion of the metal spring of the present invention is not limited to Figures 1A to 4 The shape shown can be any shape, such as U-shape, X-shape, triangle, ellipse, any geometric shape or other suitable shape.
[0032] According to the above content, one embodiment of the present invention provides a touch panel. The touch panel includes a circuit board and a metal member. The metal member is disposed on the circuit board, and the circuit board includes a grounding surface. The metal member includes a metal spring, and the position of the metal spring corresponds to the grounding surface. The metal spring includes a convex portion, and the convex portion contacts the grounding surface. Compared with the method of manually attaching a conductive cloth to fix the metal spring, since the metal spring in one embodiment of the present invention includes a convex portion, the contact area between the metal spring and the grounding surface can be strengthened without attaching a conductive cloth, so that manpower and material costs can be saved, and the problem of position displacement caused by manually attaching the conductive cloth can be avoided. In addition, compared with the comparative example in which the metal spring has only a flat portion but no convex portion, since the metal spring in one embodiment of the present invention includes a convex portion, the contact area between the metal spring and the grounding surface can be strengthened. Even if the metal spring is scratched or uneven as the use time increases, the convex portion of the metal spring can maintain good and consistent electrical contact with the grounding surface, so a good grounding effect can be achieved.
[0033] In summary, although the present invention has been disclosed by way of embodiments, it is not intended to limit the present invention. A person skilled in the art of the present invention may make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the attached claims.
Claims
1. A touch panel, characterized in that: The touch panel includes a circuit board and a metal part; The metal piece is disposed on the circuit board, and the circuit board includes a ground plane; The metal piece includes a metal spring sheet, and the position of the metal spring sheet corresponds to the ground plane; The metal spring sheet includes a convex portion, and the convex portion contacts the ground plane.
2. The touch panel according to claim 1, wherein: The metal component has a first opening. The position of the first opening corresponds to the ground plane. The metal spring is connected to the metal component and protrudes from the first opening.
3. The touch panel according to claim 2, wherein: The touch panel further comprises a back adhesive layer, and the metal piece is adhered to the circuit board through the back adhesive layer.
4. The touch panel according to claim 3, wherein: The adhesive layer is arranged between the circuit board and the metal component.
5. The touch panel according to claim 4, wherein: The adhesive layer has a second opening, and the second opening corresponds to the first opening.
6. The touch panel according to claim 1, wherein: The metal spring further includes a flat portion connected to the convex portion, and a thickness of the convex portion is greater than a thickness of the flat portion.
7. The touch panel according to claim 1, wherein: The metal member is stacked on the circuit board along a first direction, and the metal spring at least partially overlaps the ground plane in the first direction.
8. The touch panel according to claim 7, wherein: The convex portion overlaps the ground plane in the first direction.
9. The touch panel according to claim 1, wherein: The metal component further includes a frame body.