Conductive cloth injection molding tool and steering wheel conductive cloth
By forming glue blocks outside the welding area of the conductive fabric, the design of the conductive fabric injection molding tooling is solved, and the problems of easy falling off and material brittleness of the conductive fabric welding joints are achieved, and the stability and durability of the conductive fabric are achieved.
Patent Information
- Application Number
- CN202421603390.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-09
AI Technical Summary
In the prior art, the welded joints of the conductive fabric are prone to fall off and the material becomes brittle at high temperatures, resulting in wire desoldering or damage to the conductive fabric.
The conductive fabric injection molding tooling is used to inject glue into the welding area of the conductive fabric, forming glue blocks on the outside of the welding area, and using the design of the upper and lower tooling to ensure the stable fixation of the conductive fabric and the guidance of the glue liquid flow channel, forming a complete rubber block protection welding joint and welding area.
It effectively avoids wire desoldering and damage to conductive fabrics, ensuring the stability and durability of conductive fabrics during use.
Smart Images
Figure CN223058237U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of steering wheels, in particular to an injection tooling for a conductive cloth of a steering wheel and the conductive cloth of the steering wheel. Background Art
[0002] With the development of automotive technology, more and more automobiles have the function of detecting whether the driver's hands are off the steering wheel. The technical principle of off-hand detection is to place two layers of conductive cloth in the steering wheel. A capacitor is formed between the two layers of conductive cloth. When the steering wheel with the conductive cloth structure contacts the human hand, the capacitance value changes, so as to detect whether the human hand leaves the steering wheel. Commonly used is a conductive cloth made of nickel-plated ultra-thin Oxford cloth (with a thickness of only 0.1 mm). In order to output the capacitance value of the conductive cloth, a wire needs to be connected to the conductive cloth to output a capacitance signal. Since the conductive cloth is too thin, there will be two problems after welding the joint. One is that the solder joint is prone to fall off when stressed after welding the wire, and the other is that the welded part of the conductive cloth becomes brittle due to high temperature after welding. Content of the Utility Model
[0003] The purpose of the utility model is to provide an injection tooling for a conductive cloth to solve the problems existing in the above-mentioned prior art. The injection tooling for the conductive cloth is used to inject glue into the welding area of the conductive cloth, and a glue block is formed outside the welding area of the conductive cloth to protect the solder joint and the conductive cloth in the welding area, and avoid wire de-welding or damage to the conductive cloth.
[0004] The utility model also provides a conductive cloth for a steering wheel. The welding position of the conductive cloth for the steering wheel is wrapped by a glue block, which avoids de-welding or damage to the conductive cloth caused by external force during use.
[0005] To achieve the above purpose, the utility model provides the following solutions:
[0006] The utility model provides an injection tooling for a conductive cloth, which includes an upper tooling and a lower tooling. An upper injection area is arranged on the inner surface of the upper tooling, and a lower injection area is arranged on the inner surface of the lower tooling. The upper tooling and the lower tooling can be assembled together. In the assembled state, the inner surface of the upper tooling and the inner surface of the lower tooling are attached, and the upper injection area and the lower injection area are aligned. The upper injection area and the lower injection area form an injection cavity for accommodating the welding area of the conductive cloth. The upper tooling further includes an upper positioning area, and the lower tooling further includes a lower positioning area. In the assembled state, the upper positioning area and the lower positioning area are aligned and combined to form a positioning cavity, and the positioning cavity is used to accommodate the positioning area of the conductive cloth.
[0007] Preferably, an upper glue liquid flow groove is further formed on the inner surface of the upper tooling, and the upper glue liquid flow groove communicates with the upper injection area. A lower glue liquid flow groove is further formed on the inner surface of the lower tooling, and the lower glue liquid flow groove communicates with the lower injection area. In the combined state, the upper glue liquid flow groove and the lower glue liquid flow groove are aligned and combined to form a glue liquid flow channel, and a glue injection port communicating with the glue liquid flow channel is formed on the upper tooling.
[0008] Preferably, an upper clamping member is arranged in the upper injection area, and a lower clamping member is arranged in the lower injection area. In the combined state, the upper clamping member and the lower clamping member can fix the welding end of the conductive cloth.
[0009] Preferably, the upper clamping member is a first columnar structure, one end of the first columnar structure is fixed on the upper injection area, and the other end of the first columnar structure contacts the welding area of the conductive cloth;
[0010] The lower clamping member is a second columnar structure, one end of the second columnar structure is fixed on the lower injection area, and the other end of the second columnar structure contacts the welding area of the conductive cloth.
[0011] Preferably, a positioning member for determining the placement position of the conductive cloth is arranged in the lower positioning area, and the positioning member can limit the movement of the conductive cloth in the horizontal direction.
[0012] Preferably, the positioning member is at least two third columnar structures, and the third columnar structures are arranged on both sides of the conductive cloth and contact the positioning area on the conductive cloth.
[0013] Preferably, the upper glue liquid flow groove includes an upper diversion groove for guiding the flow of the glue liquid and an upper overflow groove for preventing the glue liquid from entering the gap of the injection tooling. The upper diversion groove communicates with the upper injection area. The lower glue liquid flow groove includes a lower diversion groove for guiding the flow of the glue liquid and a lower overflow groove for preventing the glue liquid from entering the gap of the injection tooling. The lower diversion groove communicates with the lower injection area. In the combined state, the upper glue liquid flow groove and the lower diversion groove are aligned and combined to form a glue liquid flow channel.
[0014] Preferably, there are two upper injection areas, the upper glue liquid flow groove is a tee structure, the upper glue liquid flow groove includes two upper diversion grooves and one upper overflow groove, there are two lower injection areas, the lower glue liquid flow groove is a tee structure, and the lower glue liquid flow groove includes two lower diversion grooves and one lower overflow groove;
[0015] The glue liquid flow channel communicates with the two injection cavities simultaneously.
[0016] Preferably, the upper tooling and the lower tooling are combined together through guide rails.
[0017] The present utility model also provides a steering wheel conductive cloth, which is characterized in that it is manufactured by the conductive cloth injection molding tooling described in any one of the claims, and includes a conductive cloth main body. A wire is welded to the welding joint of the conductive cloth main body, and a rubber block surrounds the welding joint. The rubber block is arranged on both sides of the conductive cloth main body.
[0018] The present utility model has achieved the following technical effects compared with the prior art:
[0019] The purpose of the present utility model is to provide a conductive cloth injection molding tooling. By using this conductive cloth injection molding tooling to inject glue into the welding area of the conductive cloth, a rubber block is formed outside the welding area of the conductive cloth to protect the solder joints and the conductive cloth in the welding area, and avoid wire de-welding or conductive cloth breakage.
[0020] The present utility model also provides a steering wheel conductive cloth. The welding position of the steering wheel conductive cloth is wrapped by a rubber block, which avoids de-welding or conductive cloth breakage caused by external forces during use.
[0021] The present utility model has also achieved the following technical effects compared with the prior art:
[0022] 1. In the present utility model, an upper positioning area and a lower positioning area are provided, so that the conductive cloth can be stably and accurately fixed at a specified position for glue injection, ensuring the glue injection effect;
[0023] 2. In the present utility model, an overflow groove structure is designed on the upper tooling and the lower tooling, avoiding the problem of glue overflowing from the injection area. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0025] Figure 1 It is a schematic diagram of the overall structure of the conductive cloth injection molding tooling in the present utility model;
[0026] Figure 2 It is a schematic diagram of the inner surface structure of the upper tooling in the present utility model;
[0027] Figure 3 It is a schematic diagram of the inner surface structure of the lower tooling in the present utility model;
[0028] Figure 4 It is an installation schematic diagram of the conductive cloth placed on the lower tooling in the present utility model.
[0029] Figure 5Schematic diagram of the conductive cloth of the steering wheel for welding in the present utility model;
[0030] Figure 6 Schematic diagram of the conductive cloth of the steering wheel with glue blocks in the present utility model.
[0031] Among them, 1. Upper tooling; 2. Lower tooling; 11. Upper injection area; 111. Upper clamping piece; 112. Upper wire fixing position; 12. Upper glue liquid flow groove; 121. Upper diversion groove; 122. Upper overflow groove; 13. Glue injection port; 14. Upper positioning area; 141. Positioning hole; 21. Lower injection area; 211. Lower clamping piece; 212. Lower wire fixing position; 22. Lower glue liquid flow channel; 221. Lower diversion groove; 222. Lower overflow groove; 24. Lower positioning area; 241. Positioning piece; 3. Guide rail; 4. Conductive cloth body; 5. Wire; 6. Welding joint; 7. Glue block. Specific embodiments
[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.
[0033] The purpose of the present utility model is to provide a conductive cloth injection tooling to solve the problems existing in the above-mentioned prior art. By using this conductive cloth injection tooling to inject glue into the welding area of the conductive cloth, glue blocks are formed outside the welding area of the conductive cloth to protect the solder joints and the conductive cloth in the welding area, and avoid wire de-welding or conductive cloth damage.
[0034] The present utility model also provides a conductive cloth for a steering wheel. The welding position of the conductive cloth for the steering wheel is wrapped by glue blocks to avoid de-welding or conductive cloth damage caused by external forces during use.
[0035] To make the above-mentioned objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0036] As Figure 1-4As shown in the figure, a conductive cloth injection molding tooling provided by the utility model includes an upper tooling 1 and a lower tooling 2. An upper injection area 11 is provided on the inner surface of the upper tooling 1, and a lower injection area 21 is provided on the inner surface of the lower tooling 2. The upper tooling 1 and the lower tooling 2 can be assembled together. In the assembled state, the inner surfaces of the upper tooling 1 and the lower tooling 2 are in contact with each other, and the upper injection area 11 and the lower injection area 21 are aligned. The upper injection area 11 and the lower injection area 21 form an injection cavity for accommodating the welding area of the conductive cloth. The upper tooling 1 further includes an upper positioning area 14, and the lower tooling further includes a lower positioning area 24. In the assembled state, the upper positioning area 14 and the lower positioning area 24 are aligned and combined to form a positioning cavity, and the positioning cavity is used to accommodate the positioning area of the conductive cloth.
[0037] As Figure 4 shown, the edge of the conductive cloth processed by the conductive cloth injection molding tooling is provided with a convex structure for positioning. The positioning area can limit the overall displacement of the conductive cloth by restricting the horizontal movement of the convex structure, thereby achieving positioning.
[0038] As Figure 2 and 3 shown, an upper glue liquid flow groove 12 is further provided on the inner surface of the upper tooling 1. The upper glue liquid flow groove 12 is communicated with the upper injection area 11. A lower glue liquid flow groove 22 is further provided on the inner surface of the lower tooling 2. The lower glue liquid flow groove 22 is communicated with the lower injection area 21. In the assembled state, the upper glue liquid flow groove 12 and the lower glue liquid flow groove 22 are aligned and combined to form a glue liquid flow channel. An injection port 13 communicating with the glue liquid flow channel is provided on the upper tooling 1. During operation, the glue liquid flows in from the injection port 13.
[0039] As Figure 2 and 3 shown, an upper clamping member 111 is arranged in the upper injection area 11, and a lower clamping member 211 is arranged in the lower injection area 21. In the assembled state, the upper clamping member 111 and the lower clamping member 211 can fix the welding end of the conductive cloth. The upper clamping member 111 and the lower clamping member 211 can ensure that both the upper and lower surfaces of the welding area of the conductive cloth can be in full contact with the glue liquid, so as to form a glue block that completely wraps the welding area of the conductive cloth, making the protection effect of the glue block the best.
[0040] As Figure 2 and 3As shown, the upper clamping member 111 is a first columnar structure. One end of the first columnar structure is fixed on the upper injection area 11, and the other end of the first columnar structure is in contact with the conductive cloth welding area. The lower clamping member 211 is a second columnar structure. One end of the second columnar structure is fixed on the lower injection area 21, and the other end of the second columnar structure is in contact with the conductive cloth welding area. In a preferred embodiment, the number of the upper clamping members 111 and the lower clamping members 211 is 6. In the assembled state, the upper clamping members 111 and the lower clamping members 211 are aligned.
[0041] As Figure 2 and 3 shown, the upper injection area 11 is connected with an upper wire fixing position 112 for accommodating a wire, and the lower injection area 21 is connected with a lower wire fixing position 212 for accommodating a wire.
[0042] As Figure 3 shown, a positioning member 241 for determining the placement position of the conductive cloth is arranged in the lower positioning area 24. The positioning member 241 can limit the movement of the conductive cloth in the horizontal direction. The positioning member 241 is at least two third columnar structures. The third columnar structures are arranged on both sides of the conductive cloth and are in contact with the positioning area on the conductive cloth. As Figure 4 shown, the positioning member 241 is stuck in the positioning area of the conductive cloth to achieve positioning. In a preferred embodiment, a positioning hole 141 matching the position of the positioning member 241 is arranged in the upper positioning area 14. In the assembled state, the positioning member 241 extends into the positioning hole 141.
[0043] As Figure 2 and 3 shown, the upper glue liquid flow groove 12 includes an upper diversion groove 121 for guiding the glue liquid flow and an upper overflow groove 122 for preventing the glue liquid from entering the gap of the injection mold. The upper diversion groove 121 communicates with the upper injection area 11. The lower glue liquid flow groove 22 includes a lower diversion groove 221 for guiding the glue liquid flow and a lower overflow groove 222 for preventing the glue liquid from entering the gap of the injection mold. The lower glue liquid flow groove 22 communicates with the lower injection area 21. In the assembled state, the upper glue liquid flow groove 12 and the lower glue liquid flow groove 22 are aligned and combined to form a glue liquid flow channel. In a preferred embodiment, there are two upper injection areas 11, the upper glue liquid flow groove 12 is a tee structure, the upper glue liquid flow groove 12 includes two upper diversion grooves 121 and one upper overflow groove 122. There are two lower injection areas 21, the lower glue liquid flow groove 22 is a tee structure, the lower glue liquid flow groove 22 includes two lower diversion grooves 221 and one lower overflow groove 222. The glue liquid flow channel communicates with the two injection cavities at the same time.
[0044] As Figure 1As shown, the upper tooling 1 and the lower tooling 2 are combined together through the guide rail 3. During use, the lower tooling 2 first slides along the guide rail 3 to the bottom and keeps the inner surface of the lower tooling 2 facing upward. Then, the conductive cloth is placed in the lower tooling 2. Next, the upper tooling 1 is lowered along the guide rail 3 to ensure that the inner surface of the upper tooling 1 is closely attached to the inner surface of the lower tooling 2. After the splicing is completed, glue injection starts. After the glue solidifies, the upper tooling 1 and the lower tooling 2 are separated, and finally demolding and trimming are carried out.
[0045] As Figure 1-4 shown, inclined edge grooves are provided on both the upper tooling 1 and the lower tooling 2 to facilitate the use of the upper tooling 1 and the lower tooling 2.
[0046] As Figure 5 and 6 shown, the present utility model also provides a steering wheel conductive cloth, which is manufactured by the above-mentioned conductive cloth injection mold tooling, and includes a conductive cloth main body 4. A wire 5 is welded to a welding joint 6 of the conductive cloth main body 4. The rubber block 7 surrounds the welding joint 6, and the rubber block 7 is arranged on both sides of the conductive cloth main body 4.
[0047] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.
Claims
1. A conductive cloth injection molding tooling, characterized in that: It includes an upper tooling (1) and a lower tooling (2). An upper injection area (11) is provided on the inner surface of the upper tooling (1), and a lower injection area (21) is provided on the inner surface of the lower tooling (2). The upper tooling (1) and the lower tooling (2) can be joined together. In the joined state, the inner surface of the upper tooling (1) is in contact with the inner surface of the lower tooling (2), and the upper injection area (11) is aligned with the lower injection area (21). The upper injection area (11) and the lower injection area (21) form an injection cavity for accommodating the conductive cloth welding area; The upper tooling (1) further includes an upper positioning area (14), and the lower tooling further includes a lower positioning area (24). In the joined state, the upper positioning area (14) and the lower positioning area (24) are aligned and combined to form a positioning cavity, and the positioning cavity is used for accommodating the positioning area of the conductive cloth.
2. The conductive cloth injection molding tooling according to claim 1, wherein: An upper glue liquid flow groove (12) is further provided on the inner surface of the upper tooling (1), and the upper glue liquid flow groove (12) communicates with the upper injection area (11). A lower glue liquid flow groove (22) is further provided on the inner surface of the lower tooling (2), and the lower glue liquid flow groove (22) communicates with the lower injection area (21). In the joined state, the upper glue liquid flow groove (12) and the lower glue liquid flow groove (22) are aligned and combined to form a glue liquid flow channel, and a glue injection port (13) communicating with the glue liquid flow channel is provided on the upper tooling (1).
3. The conductive fabric injection molding tooling according to claim 1, wherein: An upper clamping member (111) is provided in the upper injection area (11), and a lower clamping member (211) is provided in the lower injection area (21). In the joined state, the upper clamping member (111) and the lower clamping member (211) can fix the welding end of the conductive cloth.
4. The conductive cloth injection molding tooling according to claim 3, characterized in that: The upper clamping member (111) is a first columnar structure. One end of the first columnar structure is fixed on the upper injection area (11), and the other end of the first columnar structure is in contact with the conductive cloth welding area; The lower clamping member (211) is a second columnar structure. One end of the second columnar structure is fixed on the lower injection area (21), and the other end of the second columnar structure is in contact with the conductive cloth welding area.
5. The injection molding tooling for conductive cloth according to claim 2, characterized in that: A positioning member (241) for determining the placement position of the conductive cloth is provided in the lower positioning area (24), and the positioning member (241) can limit the movement of the conductive cloth in the horizontal direction.
6. The conductive cloth injection molding tooling according to claim 5, characterized in that: The positioning member (241) is at least two third columnar structures, and the third columnar structures are arranged on both sides of the conductive cloth and are in contact with the positioning area on the conductive cloth.
7. The conductive cloth injection molding tooling according to claim 2, wherein: The upper glue liquid flow groove (12) includes an upper diversion groove (121) for guiding the flow of the glue liquid and an upper overflow groove (122) for preventing the glue liquid from entering the gap of the injection tooling. The upper diversion groove (121) communicates with the upper injection area (11). The lower glue liquid flow groove (22) includes a lower diversion groove (221) for guiding the flow of the glue liquid and a lower overflow groove (222) for preventing the glue liquid from entering the gap of the injection tooling. The lower diversion groove (221) communicates with the lower injection area (21). In the joined state, the upper glue liquid flow groove (12) and the lower diversion groove (221) are aligned and combined to form a glue liquid flow channel.
8. The conductive fabric injection molding tooling according to claim 7, characterized in that: There are two upper injection areas (11), the upper glue liquid flow groove (12) is of a tee structure, the upper glue liquid flow groove (12) includes two upper diversion grooves (121) and one upper overflow groove (122), there are two lower injection areas (21), the lower glue liquid flow groove (22) is of a tee structure, and the lower glue liquid flow groove (22) includes two lower diversion grooves (221) and one lower overflow groove (222); The glue liquid flow path communicates with the two injection cavities at the same time.
9. The conductive cloth injection molding tooling according to any one of claims 1-8, characterized in that: The upper tooling (1) and the lower tooling (2) are combined together through a guide rail (3).
10. A conductive cloth for a steering wheel, characterized in that: Manufactured by the conductive cloth injection tooling according to any one of claims 1-9, including a conductive cloth main body (4), a wire (5) is welded to a welding joint (6) of the conductive cloth main body (4), a glue block (7) surrounds the welding joint (6), and the glue block (7) is arranged on both sides of the conductive cloth main body (4).