A heating wire connection structure, a window cover and a manufacturing method

Abstract

The present invention belongs to the technical field of automobile heating radar, and provides a heating wire connection structure, a window cover and a manufacturing method, including a diaphragm, a conductive sheet member and a circuit connector. The diaphragm is provided with a heating wire, the conductive sheet member is installed on the diaphragm, the conductive sheet member includes a main body and a clamping claw portion located at both ends of the main body, the heating wire is electrically connected to the inner side of the main body, the diaphragm is provided with a clamping claw hole matched with the clamping claw portion, the clamping claw portion passes through the clamping claw hole and is clamped on the diaphragm after being bent, and the circuit connector is electrically connected to the outer side of the main body. The advantage of the present invention is that the metal sheet member and the heating wire are on different sides of the diaphragm, and the heating wire is always protected from the shearing effect of the edge of the metal sheet member during injection molding and subsequent processes, and the relative position of the metal sheet member and the heating wire is fixed, which improves the conductivity of the heating wire and the reliability of the welding connection, and the connection reliability is strong.

Description

Technical Field

[0001] The invention belongs to the technical field of heating radars and relates to a heating wire connection structure, a window cover and a manufacturing method. Background Art

[0002] Benefiting from the development of autonomous driving, the application of laser radar is becoming more and more extensive. It is estimated that by 2026, the domestic market demand for laser radar is expected to reach 10 billion yuan, and the window cover is an indispensable and important component of laser radar. Its function is to protect the laser radar from the influence of the environment. The current heated window cover directly presses the heating wire with the spring sheet when connected to the heating of the diaphragm. This type of spring sheet has the risk of detaching from the heating wire, and because the spring sheet and the heating wire are located on the same side, that is, connected to the heating wire from the front, it is easy to break the heating wire due to the shearing effect of the edge of the spring sheet, thereby producing defective products and affecting the use of the heating function. Therefore, it is necessary to improve the existing heating wire connection structure. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a heating wire connection structure, a window cover and a manufacturing method which are easy to manufacture and improve the conductivity of the heating wire and the reliability of the welding connection in view of the current status of the prior art.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a heating wire connection structure, characterized in that it includes a diaphragm, a conductive sheet member and a circuit connector, wherein a heating wire is arranged on the diaphragm, and the conductive sheet member is installed on the diaphragm, wherein the heating wire is electrically connected to the inner side surface of the conductive sheet member, and the circuit connector is electrically connected to the outer side surface of the conductive sheet member.

[0005] In the above-mentioned heating wire connection structure, the conductive sheet member includes a main body and claw portions located at both ends of the main body, the heating wire is electrically connected to the inner side surface of the main body, a claw hole matching the claw portion is opened on the diaphragm, the claw portion passes through the claw hole and is bent and clamped on the diaphragm, and the circuit connector is electrically connected to the outer side surface of the main body.

[0006] In the above-mentioned heating wire connection structure, the diaphragm has a conductive punching hole, the electrical connection between the heating wire and the inner side of the main body has a welding point, the welding point is located at the conductive punching hole, and the conductive punching hole is filled with structural glue to fix the welding point.

[0007] As an optimization, in the above-mentioned heating wire connection structure, the structural adhesive is a conductive adhesive.

[0008] In the above-mentioned heating wire connection structure, the conductive sheet member is a metal sheet member.

[0009] The present invention further provides a window cover, comprising a window cover body and a diaphragm, wherein the diaphragm and the window cover body are integrally formed, and the diaphragm has the above-mentioned heating wire connection structure.

[0010] In the above-mentioned window cover, the front surface of the window cover body has one or more front hardening coatings, and the back surface of the window cover body has one or more rear hardening coatings, and the back surface of the rear hardening coating is coated with an AR anti-reflection film layer.

[0011] The present invention also provides a method for manufacturing a window cover, which is characterized by comprising the following steps:

[0012] Step 1: Punch out conductive holes and claw holes on the diaphragm, assemble the conductive sheet, pass the claw part through the claw hole by bending, and clamp it on the diaphragm after bending;

[0013] Step 2: Next, bury the heating wire into the other side of the diaphragm, then use resistance welding to weld the conductive sheet and the heating wire, and use conductive glue or structural glue to cover the welding point;

[0014] Step 3: Select the plastic particle material of the window cover, place the diaphragm with the conductive sheet in the mold through an electrostatic adsorption device, and use insert injection compression molding to form the diaphragm and the window cover into one piece;

[0015] Step 4: spray one or more layers of front hardening coating on the front surface of the one-piece window cover, spray one or more layers of rear hardening coating on the back of the window cover, and plate an AR anti-reflection film layer on the back of the rear hardening coating;

[0016] Step 5: Use laser engraving to remove the hardened coating and AR anti-reflection film layer on the outer side of the conductive sheet of the diaphragm, expose its welding position, and use resistance welding or laser soldering circuit connectors.

[0017] In the above-mentioned method for manufacturing a window cover, the plastic particle material of the window cover uses transparent or opaque PC, PC / PET, PC / ABS, ABS, ASA or PEI as the main plastic particles.

[0018] Compared with the prior art, the advantage of the present invention lies in that a metal sheet piece is used to connect with the internal heating wire, and the metal sheet piece is pre-assembled on the diaphragm, which is convenient for welding with the heating wire and solidified with structural adhesive, thereby ensuring that the metal sheet piece and the heating wire are on different sides of the diaphragm. During injection molding and subsequent processes, the heating wire is always protected from the shearing effect of the edge of the metal sheet piece, and the relative position of the metal sheet piece and the heating wire is fixed, thereby improving the conductivity of the heating wire and the reliability of the welding connection. The metal sheet piece is connected to the external circuit connector, and the position of the metal sheet piece welding point is exposed, which is convenient for laser soldering of the metal sheet piece, and the connection reliability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the diaphragm and the conductive sheet member in the heating wire connection structure before assembly;

[0020] Figure 2 It is a schematic diagram of the structure after the diaphragm and the conductive sheet member in the heating wire connection structure are assembled;

[0021] Figure 3 yes Figure 2 A schematic diagram of a connection structure of a heating wire and a structural adhesive in the present heating wire connection structure;

[0022] Figure 4 It is a schematic diagram of the cross section of the structure of the heating wire connection structure and the window cover after molding;

[0023] Figure 5 yes Figure 4 Schematic diagram of the structure with added hardened coating and AR anti-reflection film layer;

[0024] Figure 6 It is a front structural schematic diagram of the window cover. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it is necessary to understand that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 limiting the scope of protection of the present invention.

[0027] In the figure, the window cover body 100; the diaphragm 200; the conductive punching hole 201; the claw hole 202; the conductive sheet member 300; the main body 301; the claw part 302; the circuit connector 400; the conductive adhesive 500; the front hardening coating 600; the rear hardening coating 700; the AR anti-reflection film layer 800; the heating wire 900; and the welding point 901.

[0028] like Figure 4 , Figure 5 as well as Figure 6 As shown, a window cover comprises a window cover body 100 and a diaphragm 200, wherein the diaphragm 200 is integrally formed with the window cover body 100, and the diaphragm 200 has the above-mentioned heating wire connection structure, and heating can be performed using the heating wire 900, so that the entire window cover has a heating function, and the front surface of the window cover body 100 has one or more layers of front hardening coating 600, and the back surface of the window cover body 100 has one or more layers of rear hardening coating 700, so that the entire window cover has the functions of enhancing the transmission of specific red wavelength lasers, anti-scratch, anti-aging, anti-fingerprint, and high-angle hydrophobicity, and the back of the rear hardening coating 700 is coated with an AR anti-reflection film layer 800, so that the window cover can enhance the laser transmission.

[0029] The biggest improvement in this patent is the improvement of the heating wire connection structure, which mainly includes a diaphragm 200, a conductive sheet member 300 and a circuit connector 400. The circuit connector 400 is an FPC wiring harness, etc. A heating wire 900 is arranged on the diaphragm 200, and heating can be performed using the heating wire 900. The conductive sheet member 300 is installed on the diaphragm 200. In order to achieve a conductive connection, the conductive sheet member 300 is a metal sheet member, wherein the heating wire 900 is electrically connected to the inner side surface of the conductive sheet member 300, and the circuit connector 400 is electrically connected to the outer side surface of the conductive sheet member 300, thereby ensuring that the metal sheet member and the heating wire 900 are on different sides of the diaphragm 200. In this way, the heating wire 900 is not affected by the shearing of the edge of the metal sheet member during injection molding and subsequent processes, thereby protecting the heating wire 900.

[0030] like Figure 1 and Figure 2As shown, the conductive sheet member 300 includes a main body 301 and claw portions 302 located at both ends of the main body 301, the heating wire 900 is electrically connected to the inner side of the main body 301, and a claw hole 202 matching the claw portion 302 is opened on the diaphragm 200. The claw portion 302 passes through the claw hole 202 and is clamped on the diaphragm 200 after being bent. It can be seen here that the entire conductive sheet member 300 is flatly attached to the diaphragm 200 after being bent, and is clamped by the claw portion 302 to ensure that the claw portion 302 clamps the diaphragm 200 without loosening. In order to ensure the reliability of the internal electrical connection between the heating wire 900 and the conductive sheet member 300, as shown in FIG. Figure 3 As shown, the diaphragm 200 has a conductive punching hole 201, and the heating wire 900 and the inner side of the main body 301 are electrically connected with a welding spot 901, and the welding spot 901 is located at the conductive punching hole 201. The conductive punching hole 201 is filled with a structural adhesive for fixing the welding spot 901. The structural adhesive is a conductive adhesive 500. Since the conductive adhesive 500 itself is conductive, the structural adhesive can be used here to protect the welding spot 901, and can prevent the heating wire 900 from being broken under the action of external force. The conductive adhesive 500 can play a role in strengthening the structure and also play a role in conduction. Since the conductive adhesive 500 fills the conductive punching hole 201 and is located on the inner side of the conductive sheet member 300, it is equivalent to the heating wire 900 and the conductive sheet member 300. The inner side of the conductive sheet member 300 is connected, and the circuit connector 400 is electrically connected to the outer side of the main body 301. It can be seen here that the heating wire 900 is electrically connected to the conductive sheet member 300 through the conductive adhesive 500 and is located on the inner side, while the circuit connector 400 is electrically connected to the conductive sheet member 300 and is located on the outer side. This ensures that the conductive sheet member 300 and the heating wire 900 are on different sides of the diaphragm 200, and the heating wire 900 is not affected by the shearing of the edge of the conductive sheet member 300 during injection molding and subsequent processes, so the heating wire 900 is protected, and the relative position of the conductive sheet member 300 and the heating wire 900 is fixed, thereby improving the conductivity of the heating wire 900 and the reliability of the welding connection.

[0031] This patent also provides a method for manufacturing a window cover, which mainly includes the following steps:

[0032] Punch out conductive punching holes 201 and claw holes 202 on the diaphragm 200, then assemble the conductive sheet member 300, pass the claw portion 302 through the claw hole 202 by bending, and clamp it on the diaphragm 200 after bending, then embed the heating wire 900 into the other side of the diaphragm 200, and then weld the conductive sheet member 300 and the heating wire 900 by resistance welding, and cover the welding point 901 with conductive glue 500 or structural glue;

[0033] Then, the plastic particle material of the window cover is selected. The plastic particle material of the window cover is transparent or opaque PC, PC / PET, PC / ABS, ABS, ASA or PEI as the main plastic particles. The diaphragm 200 with the conductive sheet 300 is placed in the mold by an electrostatic adsorption device, and the insert injection molding and compression molding are adopted to form the diaphragm 200 and the window cover in one piece.

[0034] Here, both shielding and non-shielding methods can be used. When using the shielding method, one or more layers of front hardening coating 600 are sprayed on the front surface of the one-piece window cover, and one or more layers of rear hardening coating 700 are sprayed on the back of the window cover. An AR anti-reflection film layer 800 is plated on the back of the rear hardening coating 700. Laser engraving is used to remove the hardening coating and AR anti-reflection film layer 800 on the outer side of the conductive sheet 300 of the diaphragm 200 to expose its welding position, and the circuit connector 400 is welded by resistance welding or laser soldering.

[0035] When the shielding method is used here, one or more layers of front hardening coating 600 are sprayed on the front surface of the one-piece window cover, and the conductive sheet 300 that needs to be connected to the circuit connector 400 is shielded. Then, one or more layers of rear hardening coating 700 are sprayed on the back of the window cover, and an AR anti-reflection film layer 800 is plated on the back of the rear hardening coating 700. After the shielding area is removed, the circuit connector 400 is directly soldered by resistance welding or laser soldering.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the scope defined by the spirit of the present invention.

Claims

1. A heating wire connection structure, It is characterized in that It includes a diaphragm, a conductive sheet member and a circuit connector, wherein a heating wire is arranged on the diaphragm, and the conductive sheet member is installed on the diaphragm, wherein the heating wire is electrically connected to the inner side surface of the conductive sheet member, and the circuit connector is electrically connected to the outer side surface of the conductive sheet member; the conductive sheet member includes a main body and claws located at both ends of the main body, the heating wire is electrically connected to the inner side surface of the main body, a claw hole matching the claw part is opened on the diaphragm, the claw part passes through the claw hole and is bent and clamped on the diaphragm, and the circuit connector is electrically connected to the outer side surface of the main body.

2. A heating wire connection structure according to claim 1, It is characterized in that The diaphragm is provided with a conductive punching hole, and a welding spot is provided at the electrical connection between the heating wire and the inner side surface of the main body, and the welding spot is located at the conductive punching hole. The conductive punching hole is filled with a structural adhesive for fixing the welding spot.

3. A heating wire connection structure according to claim 2, It is characterized in that The structural adhesive is a conductive adhesive.

4. A heating wire connection structure according to claim 3, It is characterized in that The conductive sheet member is a metal sheet member.

5. A window cover, comprising a window cover body and a diaphragm, It is characterized in that The diaphragm is integrally formed with the window cover body, and the diaphragm has the heating wire connection structure described in claim 4.

6. A window cover according to claim 5, It is characterized in that The front surface of the window cover body is provided with one or more layers of front hardening coating, and the back surface of the window cover body is provided with one or more layers of rear hardening coating, and the back surface of the rear hardening coating is plated with an AR anti-reflection film layer.

7. A method for manufacturing a window cover, It is characterized in that The following steps are involved: Step 1: Punch out conductive holes and claw holes on the diaphragm, assemble the conductive sheet, pass the claw part through the claw hole by bending, and clamp it on the diaphragm after bending; Step 2: Next, bury the heating wire into the other side of the diaphragm, then use resistance welding to weld the conductive sheet and the heating wire, and use conductive glue or structural glue to cover the welding point; Step 3: Select the plastic particle material of the window cover, place the diaphragm with the conductive sheet in the mold through an electrostatic adsorption device, and use insert injection compression molding to form the diaphragm and the window cover into one piece; Step 4: spray one or more layers of front hardening coating on the front surface of the one-piece window cover, spray one or more layers of rear hardening coating on the back of the window cover, and plate an AR anti-reflection film layer on the back of the rear hardening coating; Step 5: Use laser engraving to remove the hardened coating and AR anti-reflection film layer on the outer side of the conductive sheet of the diaphragm, expose its welding position, and use resistance welding or laser soldering circuit connectors.

8. A method for manufacturing a window cover according to claim 7, It is characterized in that The plastic particle material of the window cover uses transparent or opaque PC, PC / PET, PC / ABS, ABS, ASA or PEI as the main plastic particles.

Images