High-wear-resistance linear straight sliding type resistance sheet

Abstract

The utility model provides a kind of high wear-resisting linear straight sliding type resistance sheet, including insulating substrate, first conductive metal circuit layer, second conductive metal circuit layer, third conductive metal circuit layer, fourth conductive metal circuit layer, fifth conductive metal circuit layer, sixth conductive metal circuit layer, first carbon film resistance layer, second carbon film resistance layer, third carbon film resistance layer, fourth carbon film resistance layer, first conductive metal circuit layer is connected with second conductive metal circuit layer by first carbon film resistance layer, fifth conductive metal circuit layer is connected with sixth conductive metal circuit layer by second carbon film resistance layer, third carbon film resistance layer is covered and arranged on the upper surface of first carbon film resistance layer, fourth carbon film resistance layer is covered and arranged on the upper surface of second carbon film resistance layer;The upper surface of third carbon film resistance layer, fourth carbon film resistance layer, third conductive metal circuit layer, fourth conductive metal circuit layer is covered and arranged with perpendicularity heteroconductive adhesive layer.On the basis of reducing cost, improve sliding life.

Description

Technical Field

[0001] This utility model relates to the field of carbon film technology, specifically to a high wear-resistant linear sliding resistor. Background Technology

[0002] Chinese patent application CN 211858300 U, published on November 3, 2020, discloses a long-life sliding potentiometer, comprising a base plate, a slide block connected to the base plate, a top cover connected to the slide block, a resistive layer at the upper end of the slide block, and a rolling brush module connected to the resistive layer; the rolling brush module includes a sliding block, a toggle lever, a first conductive sheet, a second conductive sheet, and ball bearings, with a gap between the first and second conductive sheets, and four ball bearings respectively rollingly connected to the upper surfaces of the first, second, third, and fourth carbon films. The existing technology has the following drawbacks: its standard lifespan is only between 100,000 and 1 million cycles. To increase it to 1 million to 10 million cycles, the resistive element cannot meet the requirements due to wear. Another solution to extend lifespan is to improve the brush material, replacing common brush materials like aluminum alloy, phosphor bronze, and beryllium copper with hexa-element alloys (Pd, Ag, Cu, Au, Pt, Zn). This utilizes the strength, hardness, good elasticity, and low wear resistance of hexa-element alloys. However, using this method makes the cost of the brush itself higher than that of the entire potentiometer, resulting in low market acceptance and poor cost-effectiveness. Therefore, improvements are urgently needed. Utility Model Content

[0003] To address the above problems, this utility model provides a high wear-resistant linear sliding resistor sheet with a vertically oriented anisotropic conductive adhesive layer, which greatly improves the sliding life while reducing costs.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-wear-resistant linear sliding resistor sheet, comprising an insulating substrate, and further comprising a first conductive metal circuit layer, a second conductive metal circuit layer, a third conductive metal circuit layer, a fourth conductive metal circuit layer, a fifth conductive metal circuit layer, a sixth conductive metal circuit layer, a first carbon film resistor layer, a second carbon film resistor layer, a third carbon film resistor layer, and a fourth carbon film resistor layer printed on the insulating substrate. The first conductive metal circuit layer is connected to the second conductive metal circuit layer through the first carbon film resistor layer, and the fifth conductive metal circuit layer is connected to the sixth conductive metal circuit layer through the second carbon film resistor layer. The third carbon film resistive layer is disposed on the upper surface of the first carbon film resistive layer, and the fourth carbon film resistive layer is disposed on the upper surface of the second carbon film resistive layer; the first carbon film resistive layer, the second carbon film resistive layer, the third carbon film resistive layer, the fourth carbon film resistive layer, the third conductive metal circuit layer, and the fourth conductive metal circuit layer are all configured as line segments; the third conductive metal circuit layer and the fourth conductive metal circuit layer are parallel to the first carbon film resistive layer and the second carbon film resistive layer; the upper surfaces of the third carbon film resistive layer, the fourth carbon film resistive layer, the third conductive metal circuit layer, and the fourth conductive metal circuit layer are covered with a vertically oriented anisotropic conductive adhesive layer in the area through which the brush slides.

[0005] Preferably, the first conductive metal circuit layer, the second conductive metal circuit layer, the third conductive metal circuit layer, the fourth conductive metal circuit layer, the fifth conductive metal circuit layer, and the sixth conductive metal circuit layer are all respectively set as silver layers.

[0006] Preferably, the thickness of the first conductive metal circuit layer, the second conductive metal circuit layer, the third conductive metal circuit layer, the fourth conductive metal circuit layer, the fifth conductive metal circuit layer, and the sixth conductive metal circuit layer is set to 8-12 μm.

[0007] Preferably, the film thickness of the first carbon film resistive layer and the second carbon film resistive layer is set to 10-15 μm.

[0008] Preferably, the thickness of the third carbon film resistive layer and the fourth carbon film resistive layer is set to 16-24 μm.

[0009] Preferably, the thickness of the vertical anisotropic conductive adhesive layer is set to 5–8 μm.

[0010] The beneficial effects of this utility model are as follows: The upper surfaces of the third carbon film resistive layer, the fourth carbon film resistive layer, the third conductive metal circuit layer, and the fourth conductive metal circuit layer are covered with a vertically oriented anisotropic conductive adhesive layer in the area through which the brush slides. Utilizing the principle of vertical conductivity, when the brush slides on it, the contact point is connected to the underlying carbon film or silver film through the vertically oriented anisotropic conductive adhesive, forming a circuit output. The vertically oriented anisotropic conductive adhesive has good wear resistance, thus greatly improving the sliding life while reducing costs, achieving a sliding life of 1 million to 1000 cycles. Attached Figure Description

[0011] Figure 1 This is a top view of the present invention (showing the relative structural relationship of the first conductive metal circuit layer, the second conductive metal circuit layer, the third conductive metal circuit layer, the fourth conductive metal circuit layer, the fifth conductive metal circuit layer, and the sixth conductive metal circuit layer).

[0012] Figure 2 This is a top view of the present invention (showing the structural relationship between the first carbon film resistive layer and the second carbon film resistive layer).

[0013] Figure 3 This is a top view of the present invention (showing the structural relationship between the third carbon film resistive layer and the fourth carbon film resistive layer).

[0014] Figure 4 This is a top view of the present invention (showing the structural relationship of the vertical anisotropic conductive adhesive layer).

[0015] Figure 5 This is a schematic diagram illustrating the functional implementation of this utility model (showing a partial connection between the conductive metal circuit layer and the carbon film resistor layer; the arrow indicates the direction of conduction).

[0016] The reference numerals in the figures are: insulating substrate 10, first conductive metal circuit layer 11, second conductive metal circuit layer 12, third conductive metal circuit layer 13, fourth conductive metal circuit layer 16, fifth conductive metal circuit layer 14, sixth conductive metal circuit layer 15, first carbon film resistor layer 17, second carbon film resistor layer 18, third carbon film resistor layer 19, fourth carbon film resistor layer 20, vertical anisotropic conductive adhesive layer 21, and brush 22. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0018] Reference Figures 1-5As shown, this embodiment provides a high wear-resistant linear sliding resistor, including an insulating substrate 10, and further including a first conductive metal circuit layer 11, a second conductive metal circuit layer 12, a third conductive metal circuit layer 13, a fourth conductive metal circuit layer 16, a fifth conductive metal circuit layer 14, a sixth conductive metal circuit layer 15, a first carbon film resistor layer 17, a second carbon film resistor layer 18, a third carbon film resistor layer 19, and a fourth carbon film resistor layer 20 printed on the insulating substrate. The first conductive metal circuit layer 11, the second conductive metal circuit layer 12, the third conductive metal circuit layer 13, the fourth conductive metal circuit layer 16, the fifth conductive metal circuit layer 14, and the sixth conductive metal circuit layer 15 are all respectively set as silver layers. The first conductive metal circuit layer 11 is connected to the second conductive metal circuit layer 12 through the first carbon film resistor layer 17, the fifth conductive metal circuit layer 14 is connected to the sixth conductive metal circuit layer 15 through the second carbon film resistor layer 18, the third carbon film resistor layer 19 is disposed on the upper surface of the first carbon film resistor layer 17, and the fourth carbon film resistor layer 20 is disposed on the upper surface of the second carbon film resistor layer 18; the first carbon film resistor layer 17, the second carbon film resistor layer 18, the third carbon film resistor layer 19, the fourth carbon film resistor layer 20, the third conductive metal circuit layer 13, and the fourth conductive metal circuit layer 16 are all configured as line segments; the third conductive metal circuit layer 13 and the fourth conductive metal circuit layer 16 are parallel to the first carbon film resistor layer 17 and the second carbon film resistor layer 18; the upper surfaces of the third carbon film resistor layer 19, the fourth carbon film resistor layer 20, the third conductive metal circuit layer 13, and the fourth conductive metal circuit layer 16 are covered with a vertically oriented anisotropic conductive adhesive layer 21 in the area traversed by the brush 22 through printing or hot pressing.

[0019] In a preferred embodiment, the thicknesses of the first conductive metal circuit layer 11, the second conductive metal circuit layer 12, the third conductive metal circuit layer 13, the fourth conductive metal circuit layer 16, the fifth conductive metal circuit layer 14, and the sixth conductive metal circuit layer 15 are set to 8–12 μm. The film thicknesses of the first carbon film resistive layer 17 and the second carbon film resistive layer 18 are set to 10–15 μm. The film thicknesses of the third carbon film resistive layer 19 and the fourth carbon film resistive layer 20 are set to 16–24 μm. The thickness of the vertical anisotropic conductive adhesive layer 21 is set to 5–8 μm.

[0020] In this embodiment, the upper surfaces of the third carbon film resistive layer, the fourth carbon film resistive layer, the third conductive metal circuit layer, and the fourth conductive metal circuit layer are covered with a vertically oriented anisotropic conductive adhesive layer in the area through which the brush slides. Utilizing the principle of vertical conductivity, when the brush slides on it, the contact points are connected vertically to the underlying carbon film or silver film through the vertically oriented anisotropic conductive adhesive, forming a circuit output. The main materials of the vertically oriented anisotropic conductive adhesive are resin and conductive particles, thus exhibiting excellent wear resistance. Therefore, while reducing costs, the sliding life is greatly improved, achieving a sliding life of 1 million to 1000 cycles.

[0021] The above embodiments illustrate only one implementation of the present utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present utility model, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent should be determined by the appended claims.

Claims

1. A high wear-resistant linear sliding resistor, comprising an insulating substrate (10), characterized in that, It also includes a first conductive metal circuit layer (11), a second conductive metal circuit layer (12), a third conductive metal circuit layer (13), a fourth conductive metal circuit layer (16), a fifth conductive metal circuit layer (14), a sixth conductive metal circuit layer (15), a first carbon film resistor layer (17), a second carbon film resistor layer (18), a third carbon film resistor layer (19), and a fourth carbon film resistor layer (20) disposed on the insulating substrate (10). The first conductive metal circuit layer (11) is connected to the second conductive metal circuit layer (12) through the first carbon film resistor layer (17), the fifth conductive metal circuit layer (14) is connected to the sixth conductive metal circuit layer (15) through the second carbon film resistor layer (18), and the third carbon film resistor layer (19) covers the first carbon film resistor layer (17). On the upper surface of the second carbon film resistive layer (18), the fourth carbon film resistive layer (20) is covered and disposed on the upper surface of the second carbon film resistive layer (18); the first carbon film resistive layer (17), the second carbon film resistive layer (18), the third carbon film resistive layer (19), the fourth carbon film resistive layer (20), the third conductive metal circuit layer (13), and the fourth conductive metal circuit layer (16) are all configured as line segments; the third conductive metal circuit layer (13) and the fourth conductive metal circuit layer (16) are parallel to the first carbon film resistive layer (17) and the second carbon film resistive layer (18); the upper surfaces of the third carbon film resistive layer (19), the fourth carbon film resistive layer (20), the third conductive metal circuit layer (13), and the fourth conductive metal circuit layer (16) are covered with a vertical anisotropic conductive adhesive layer (21) in the area through which the brush (22) slides.

2. The high wear-resistant linear sliding resistor sheet according to claim 1, characterized in that, The first conductive metal circuit layer (11), the second conductive metal circuit layer (12), the third conductive metal circuit layer (13), the fourth conductive metal circuit layer (16), the fifth conductive metal circuit layer (14), and the sixth conductive metal circuit layer (15) are all set as silver layers.

3. The high wear-resistant linear sliding resistor sheet according to claim 1, characterized in that, The thickness of the first conductive metal circuit layer (11), the second conductive metal circuit layer (12), the third conductive metal circuit layer (13), the fourth conductive metal circuit layer (16), the fifth conductive metal circuit layer (14), and the sixth conductive metal circuit layer (15) is set to 8-12 μm.

4. The high wear-resistant linear sliding resistor sheet according to claim 1, characterized in that, The thickness of the first carbon film resistive layer (17) and the second carbon film resistive layer (18) is set to 10-15 μm.

5. The high wear-resistant linear sliding resistor sheet according to claim 1, characterized in that, The thickness of the third carbon film resistive layer (19) and the fourth carbon film resistive layer (20) is set to 16-24 μm.

6. The high wear-resistant linear sliding resistor sheet according to claim 1, characterized in that, The thickness of the vertical anisotropic conductive adhesive layer (21) is set to 5-8 μm.

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