Composite magnesium plate, structural member and terminal equipment

Abstract

The utility model provides a composite magnesium plate, a structural member and a terminal device, the composite magnesium plate comprises a first layer of magnesium alloy plate, a middle viscoelastic damping layer and a second layer of magnesium alloy plate, and the middle viscoelastic damping layer is located between the first layer of magnesium alloy plate and the second layer of magnesium alloy plate. The strength, the damping characteristic and the wide temperature range performance of the composite magnesium plate can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of magnesium alloy plate, concretely relates to a composite magnesium plate, structural member and terminal equipment. BACKGROUND

[0002] Mechanical components will produce vibration and noise after being excited by external excitation, such as in the driving process of a whole vehicle, since the electric control box of the power assembly system of a new energy vehicle is assembled at the upper position, the upper cover plate is prone to resonance to produce noise.

[0003] Damping technology is the main means to solve the problem of vibration and noise reduction, which relies on the high damping characteristics of the damping material itself to achieve the purpose of vibration and noise reduction. Common damping material matrixes include viscoelastic materials and high-damping alloys. The viscoelastic material realizes energy dissipation from three aspects of molecular chain movement, internal friction and continuous destruction and regeneration of physical bonds between macromolecular chains, thereby effectively reducing vibration and noise and showing good high-damping characteristics. However, the viscoelastic material (viscoelastic damping material) has poor rigidity and strength, and thus cannot be used as a structural material. Moreover, the viscoelastic damping material has the disadvantages of easy aging and poor creep resistance at a high temperature such as the working temperature range (-40℃-150℃) of the electric control box, and the working application scenario is relatively limited.

[0004] Therefore, a damping material with good strength, damping characteristics and wide temperature range performance is relatively lacking. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a composite magnesium plate, structural member and terminal equipment, provides a kind of high-strength, high-damping performance and wide temperature range composite magnesium plate, effectively solve the problems existing in prior art.

[0006] The utility model provides a composite magnesium plate, including first layer magnesium alloy plate, intermediate viscoelastic damping layer and second layer magnesium alloy plate, intermediate viscoelastic damping layer is located between first layer magnesium alloy plate and second layer magnesium alloy plate.

[0007] The composite magnesium plate described above has a thickness of 1.5-2.1 mm.

[0008] The first layer magnesium alloy plate has a thickness of 0.7-1 mm, and / or the second layer magnesium alloy plate has a thickness of 0.7-1 mm.

[0009] The intermediate viscoelastic damping layer has a thickness of 40-80 μm.

[0010] The first layer magnesium alloy plate includes a magnesium-nickel alloy plate and / or a magnesium-zirconium-rare earth alloy plate.

[0011] The composite magnesium plate as described above, the second layer of magnesium alloy plate comprises a magnesium-nickel alloy plate and / or a magnesium-zirconium-rare earth alloy plate.

[0012] The composite magnesium plate as described above, a surface of the first layer of magnesium alloy plate away from the intermediate viscoelastic damping layer is covered with an oxide film; and / or, a surface of the first layer of magnesium alloy plate away from the intermediate viscoelastic damping layer is coated with a resin.

[0013] The composite magnesium plate as described above, a surface of the second layer of magnesium alloy plate away from the intermediate viscoelastic damping layer is covered with an oxide film; and / or, a surface of the second layer of magnesium alloy plate away from the intermediate viscoelastic damping layer is coated with a resin.

[0014] The utility model provides a kind of structural member, the structural member includes the composite magnesium plate as described above.

[0015] The utility model provides a kind of terminal device, the terminal device includes the structural member as described above.

[0016] The utility model provides a kind of composite magnesium plate, structural member and terminal device, magnesium alloy is more than other metal material consumption deformation work under the same load, is the structural material of better damping performance, can be used to control noise and enhance structural stability, also have better vibration damping performance and mechanical property, intermediate viscoelastic damping layer can play the role of bonding first layer magnesium alloy plate and second layer magnesium alloy plate, also can play the effect of reinforcing damping noise reduction, magnesium alloy along with the moderate rise in temperature its damping performance also improves, can make up the defect that viscoelastic damping material is obviously reduced in temperature higher, such as greater than 80 DEG C, its damping noise reduction effect, to improve the damping performance of composite magnesium plate, it is obvious that the composite magnesium plate of the utility model uses two layers of magnesium alloy plate and viscoelastic damping layer combination, can exert the vibration damping of magnesium alloy, better mechanical property (such as rigidity and strength), wide temperature range performance, can also realize energy dissipation through the internal friction of viscoelastic damping layer, further weaken vibration and noise, so as to show good high damping characteristic. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will be to the drawings needed to be used in the embodiment or prior art description simple introduction, obviously, the following description in the drawings is some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, according to these drawings, other drawings can also be obtained.

[0018] Figure 1 The structure schematic view of the composite magnesium plate provided by the embodiments of the utility model is shown in the following figure.

[0019] Figure 2 A schematic diagram of the sample preparation process for testing the peel strength of composite magnesium plates.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1-First layer magnesium alloy plate; 2-Intermediate viscoelastic damping layer; 3-Second layer magnesium alloy plate; 001-Composite magnesium plate; 002-Sample material; 003-Sample blank. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, a further detailed description of the present invention is provided below. The specific embodiments listed below are merely descriptions of the principles and features of the present invention, and the examples are only used to explain the present invention and are not intended to limit its scope. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the protection scope of the present invention.

[0023] Magnesium is one of the most abundant and widely distributed elements in nature, possessing advantages such as high specific strength, high specific modulus of elasticity, good heat dissipation, good damping properties, and greater impact load capacity than aluminum alloys. Pure magnesium exhibits good damping properties; its damping attenuation coefficient is 5 times that of cast iron and 12 times that of aluminum alloys. Although pure magnesium has relatively poor mechanical properties, magnesium alloys obtained through alloying can possess higher mechanical properties, and the damping performance of magnesium alloys improves with moderate increases in temperature. Furthermore, magnesium alloys also possess excellent casting, extrusion, rolling, machining, and bending properties.

[0024] Based on this, the present invention provides a composite magnesium plate, such as Figure 1 As shown, the composite magnesium plate includes a first magnesium alloy plate (1), an intermediate viscoelastic damping layer (2), and a second magnesium alloy plate (3), with the intermediate viscoelastic damping layer (2) located between the first magnesium alloy plate (1) and the second magnesium alloy plate (3).

[0025] According to research analysis, the magnesium alloy consumes more deformation work than other metal materials under the same load, is a better damping performance structural material, can be used for controlling noise and enhancing structural stability, also has better damping performance and mechanical properties, the intermediate viscoelastic damping layer can play the role of bonding the first layer magnesium alloy plate and the second layer magnesium alloy plate, and can also play the effect of strengthening damping and noise reduction, the damping performance of the magnesium alloy will also be improved with the moderate increase of temperature, which can make up for the defect that the damping and noise reduction effect of the viscoelastic damping material is obviously reduced when the temperature is higher, such as greater than 80 DEG C, thereby improving the damping performance of the composite magnesium plate, so the composite magnesium plate of the utility model is combined with two layers of magnesium alloy plates and a viscoelastic damping layer, which can play the damping performance, better mechanical properties (such as rigidity and strength) and wide temperature range performance of the magnesium alloy, and can realize energy dissipation through the internal friction of the viscoelastic damping layer, further weaken vibration and noise, thereby showing good high-damping characteristics.

[0026] Therefore, the composite magnesium plate has good mechanical properties, damping performance and a wide temperature range, is a high-strength, high-damping and wide-temperature-range composite magnesium plate, and can be used for manufacturing electric control box cover plates and power box cover plates in new energy vehicles.

[0027] The thickness of the composite magnesium plate can be 1.5-2.1mm, such as 1.5mm, 1.8mm, 2.0mm, 2.1mm or a range formed by any two of them, which helps to improve the weight reduction effect of the composite magnesium plate, reduce the cost, and at the same time, take into account the better strength, damping characteristics and wide temperature range performance.

[0028] The thickness of the first layer magnesium alloy plate can be 0.7-1mm, such as 0.7mm, 0.8mm, 0.9mm, 1mm or a range formed by any two of them, and the thickness of the second layer magnesium alloy plate can be 0.7-1mm, such as 0.7mm, 0.8mm, 0.9mm, 1mm or a range formed by any two of them. This helps to improve the weight reduction effect of the composite magnesium plate, reduce the cost, and at the same time, take into account the better strength, damping characteristics and wide temperature range performance.

[0029] The first layer magnesium alloy plate in the above composite magnesium plate can include a magnesium-nickel alloy plate and / or a magnesium-zirconium-rare earth alloy plate, and similarly, the second layer magnesium alloy plate can also include a magnesium-nickel alloy plate and / or a magnesium-zirconium-rare earth alloy plate, which helps to improve the strength and damping performance of the composite magnesium plate.

[0030] For example, according to the analysis of the G-L dislocation theory, the dislocation tangles caused by alloying elements can greatly limit the movement of dislocations, resulting in the decrease of damping performance. Although the Zr atoms in the Mg-Zr-RE alloy have elastic interaction with dislocations under the action of external stress, the damping performance of the Mg-Zr-RE alloy slightly decreases. However, due to the grain refinement effect of Zr and RE on the alloy and the solid solution strengthening effect of a part of Zr and RE in the magnesium matrix, as well as the precipitation hardening effect of RE, the mechanical properties of the magnesium alloy at room temperature and high temperature are effectively improved. This unique mechanism makes the Mg-Zr-RE alloy have high damping and high mechanical properties. Specifically, the tensile strength of the Mg-Zr-RE alloy at room temperature can be greater than 260 MPa. In addition, as the temperature increases, the density of point defects and linear defects increases, the dislocation density also increases, and the elastic interaction with Zr atoms increases, which improves the damping performance of the Mg-Zr-RE alloy, thereby helping to improve the strength and damping performance of the composite magnesium plate. The composite magnesium plate also has good high-damping characteristics in the main working temperature range (such as 20-120℃) of the electric control box.

[0031] Further, in the Mg-Zr-RE alloy plate described above, the mass percentage of Zr can be 0.5-1%, and the mass percentage of RE can be 0.2-0.4%, which helps to improve the strength and damping performance of the Mg-Zr-RE alloy plate.

[0032] The intermediate viscoelastic damping layer (high-molecular viscoelastic damping layer) described above can be a viscoelastic damping layer including one or more of nitrile rubber, butyl rubber, and epoxy resin, which can achieve strong adhesion with the magnesium alloy plate and also make the composite magnesium plate have high damping performance.

[0033] In addition, the thickness of the intermediate viscoelastic damping layer can be 40-80μm, such as 40μm, 50μmm, 60μm, 70μm, 80μm or a range formed by any two of them, which helps to improve the adhesion (peeling strength) of the intermediate viscoelastic damping layer (damping glue) and the magnesium alloy plate, as well as the damping noise reduction effect, thereby helping to improve the strength, damping characteristics and wide temperature range performance of the composite magnesium plate.

[0034] In some embodiments, the tensile strength of the magnesium alloy plate (the first layer magnesium alloy plate and the second layer magnesium alloy plate) is greater than 260 MPa, and the damping loss factor of the composite magnesium plate at room temperature and high temperature is greater than 0.3, and the peeling strength is greater than 30N / cm.

[0035] In addition, the upper surface of the first magnesium alloy plate away from the intermediate viscoelastic damping layer and the lower surface of the second magnesium alloy plate away from the intermediate viscoelastic damping layer can be covered with an oxide film, which helps to improve the corrosion resistance and hardness of the composite magnesium plate. The oxide film can be formed by anodic oxidation surface treatment. The conditions for the anodic oxidation surface treatment are not particularly limited and can be performed according to conventional processes in the art.

[0036] The upper surface of the first magnesium alloy plate away from the intermediate viscoelastic damping layer and the lower surface of the second magnesium alloy plate away from the intermediate viscoelastic damping layer can be coated with a resin, which helps to improve the corrosion resistance and hardness of the composite magnesium plate. The resin can be coated using conventional resin sealing surface treatment processes in the art.

[0037] It can be understood that the upper surface of the first magnesium alloy plate away from the intermediate viscoelastic damping layer and the lower surface of the second magnesium alloy plate away from the intermediate viscoelastic damping layer can be covered with at least one of the oxide film or the resin, that is, the surfaces can be covered with the oxide film alone, coated with the resin alone, or covered with the oxide film and then coated with the resin, which helps to improve the corrosion resistance and hardness of the composite magnesium plate.

[0038] The composite magnesium plate of the present application can be prepared according to a process comprising at least the steps of gluing, baking, lamination, hot pressing, and curing.

[0039] In a specific implementation, the surfaces of the upper and lower magnesium alloy plates can be first cleaned with alcohol, one of the magnesium alloy plates (the first magnesium alloy plate) can be placed on a coating machine, the thickness of the glue layer can be set, the intermediate viscoelastic damping layer material (damping glue) can be poured, and the uniform gluing step can be started. The first magnesium alloy plate coated with the intermediate viscoelastic damping layer can be placed in an oven, baked at a temperature of 90-110 DEG C for 10-12 min, and then taken out. After cooling, the other magnesium alloy plate (the second magnesium alloy plate) can be laminated on the intermediate viscoelastic damping layer, and then the hot pressing step can be performed on a hot press, wherein the hot pressing temperature is 130-170 DEG C, the hot pressing pressure is 4-8 MPa, and the hot pressing time is 10-15 min. Subsequently, the composite magnesium plate can be placed in an oven for curing treatment, the curing temperature is 140-180 DEG C, and the curing time is 1-3 h.

[0040] Next, the surface of the composite magnesium plate can be anodized, or sealed with a resin, or anodized and then sealed with a resin.

[0041] The present application also provides a structural member comprising the composite magnesium plate.

[0042] Specifically, the structural member can include an electric control box or a power box. The composite magnesium plate can be used as a cover plate of the electric control box or the power box.

[0043] The utility model also provides a terminal equipment, the terminal equipment includes above -mentioned structural member.

[0044] The terminal equipment can include a new energy vehicle.

[0045] The utility model is further illustrated by specific examples and comparative examples. Unless otherwise specified, the reagents, materials and instruments used in the following are conventional reagents, conventional materials and conventional instruments, which are commercially available. The reagents and materials involved can also be synthesized by conventional synthesis methods.

[0046] The intermediate viscoelastic damping layer (damping glue) includes nitrile rubber and epoxy resin.

[0047] The comparative example 1 common glue includes styrene butadiene rubber and epoxy resin.

[0048] Example 1

[0049] A composite magnesium plate includes a first layer Mg-Zr-RE alloy plate with a thickness of 0.8 mm, an intermediate viscoelastic damping layer (damping glue) with a thickness of 60 µm, and a second layer Mg-Zr-RE magnesium alloy plate with a thickness of 0.8 mm, wherein the intermediate viscoelastic damping layer is located between the first layer Mg-Zr-RE alloy plate and the second layer Mg-Zr-RE magnesium alloy plate.

[0050] Example 2

[0051] A composite magnesium plate includes a first layer Mg-Zr-RE alloy plate with a thickness of 0.7 mm, an intermediate viscoelastic damping layer (damping glue) with a thickness of 40 µm, and a second layer Mg-Zr-RE magnesium alloy plate with a thickness of 0.8 mm, wherein the intermediate viscoelastic damping layer is located between the first layer Mg-Zr-RE alloy plate and the second layer Mg-Zr-RE magnesium alloy plate.

[0052] Example 3

[0053] A composite magnesium plate includes a first layer Mg-Zr-RE alloy plate with a thickness of 1 mm, an intermediate viscoelastic damping layer (damping glue) with a thickness of 80 µm, and a second layer Mg-Zr-RE magnesium alloy plate with a thickness of 1 mm, wherein the intermediate viscoelastic damping layer is located between the first layer Mg-Zr-RE alloy plate and the second layer Mg-Zr-RE magnesium alloy plate.

[0054] Example 4

[0055] A composite magnesium plate includes a first Mg-Ni alloy plate with a thickness of 0.8 mm, an intermediate viscoelastic damping layer (damping adhesive) with a thickness of 60 µm, and a second Mg-Ni magnesium alloy plate with a thickness of 0.8 mm, wherein the intermediate viscoelastic damping layer is located between the first Mg-Zr-RE alloy plate and the second Mg-Zr-RE magnesium alloy plate.

[0056] Comparative Example 1

[0057] A composite magnesium plate includes a first Mg-Zr-RE alloy plate with a thickness of 0.8 mm, a common adhesive layer with a thickness of 60 µm, and a second Mg-Zr-RE magnesium alloy plate with a thickness of 0.8 mm, wherein the intermediate viscoelastic damping layer is located between the first Mg-Zr-RE alloy plate and the second Mg-Zr-RE magnesium alloy plate.

[0058] Comparative Example 2

[0059] A composite magnesium plate includes a first Mg-Zr-RE alloy plate with a thickness of 1.6 mm and an intermediate viscoelastic damping layer (damping adhesive) with a thickness of 60 µm, which are stacked sequentially.

[0060] Test case

[0061] The following parameters of each embodiment and comparative example were tested:

[0062] Damping loss factor: The damping loss factor of magnesium alloy plate, intermediate viscoelastic damping layer and composite magnesium plate at different temperatures was tested using GB / T 18258-2000 Damping Material Damping Performance Test Method (Cantilever Beam Resonance Method). Among them, the damping loss factor of the material reaching 0.3 or above means that the material is a high damping factor material. When applied to the electric control cover plate, it can reduce the noise by at least 10 decibels, and the noise reduction effect is obvious.

[0063] Peel strength: at room temperature, such as Figure 2As shown, along the length direction of the composite magnesium plate (001), the head and tail parts of the composite magnesium plate are cut off, the length of the cut-off parts should be not less than 150 mm respectively, then the test samples (002) with a width of 150 mm are cut at both ends, then the two sides of the test samples are cut off along the width direction of the composite magnesium plate, the cut-off parts should be not less than 50 mm respectively, the remaining part 4 is equally divided to prepare the sample embryo (003) with a length x width = 150 mm x 25 mm, then the sample embryo is clamped on the bench vice, clamped, locked and kept vertical, 50 mm above the vice face is reserved, the middle part of the adhesive surface is split and knocked flat, the split part is perpendicular to the reserved part, the test sample is T-shaped, which can be used for testing, then the material tensile testing machine is used to test the relationship curve between the peeling force and the peeling length, the test tensile speed is 100 mm / min; the average peeling force is tested from the relationship curve between the peeling force and the peeling length, the average peeling force is calculated to obtain the peeling strength, wherein the peeling strength is the ratio of the average peeling force to the sample width;

[0064] Tensile strength: the tensile strength of the magnesium alloy plate is tested according to GB / T 228.1-2010 Metal Materials Tensile Test Part 1: Room Temperature Test Method.

[0065] Test results

[0066] Table 1 Damping loss factor of magnesium alloy at different temperatures and tensile strength at room temperature

[0067]

[0068] Table 2 Damping loss factor of intermediate viscoelastic damping layer (damping adhesive) at different temperatures

[0069]

[0070] Table 3 Damping loss factor of the composite magnesium plate of Example 1 at different temperatures and peeling strength at room temperature

[0071]

[0072] Table 4 Damping loss factor of the composite magnesium plate of Example 2 at different temperatures, tensile strength and peeling strength at room temperature

[0073]

[0074] Table 5 Damping loss factor of the composite magnesium plate of Example 3 at different temperatures, tensile strength and peeling strength at room temperature

[0075]

[0076] Table 6 Damping loss factor of the composite magnesium plate of Example 4 at different temperatures, tensile strength and peeling strength at room temperature

[0077]

[0078] Table 7 damping loss factor of the composite magnesium plate of Comparative Example 1 at different temperatures, tensile strength and peel strength at room temperature

[0079]

[0080] After the damping adhesive layer of Comparative Example 1 is replaced by a common adhesive, the peel strength and the damping factor of the composite magnesium plate are obviously reduced, and the obvious noise reduction effect cannot be achieved and the stamping cracking risk exists.

[0081] Table 8 damping loss factor and peel strength of the composite magnesium plate of Comparative Example 2 at room temperature

[0082]

[0083] After the composite magnesium plate structure of Comparative Example 2 is replaced by a 1.6mm magnesium alloy+60um damping adhesive single-layer structure, the damping factor is basically unchanged, but the peel strength is 0, and it does not have the function of a structural part and a stamping part.

[0084] The damping loss factor and the peel strength of the composite magnesium plate (see Scheme 1 for details) defined in the following table are tested in the embodiments of the utility model, and see Table 9 for details:

[0085] Table 9

[0086]

[0087] Data analysis:

[0088] In the research, it is found that the damping loss factor of the single-layer Mg-Zr-RE alloy plate and the damping adhesive layer gradually increases with the increase of the thickness. After the Mg-Zr-RE alloy plate and the damping adhesive layer are prepared into a composite magnesium plate, when the damping adhesive layer is thin, the damping loss factor and the peel strength are both low, because the damping adhesive layer does not fully play the effect of adhesion and damping noise reduction; with the increase of the thickness of the damping adhesive layer, the damping loss factor and the peel strength first increase and then decrease, when the thickness of the damping adhesive layer is 50-60um, the damping loss factor and the peel strength reach the best effect, because the bubbles in the damping adhesive layer are not all discharged during the preparation of the composite magnesium plate when the damping adhesive layer is too thick, causing holes in the damping adhesive layer, and the damping adhesive layer is too thick, which is difficult to fully cure in the curing step, so that the damping loss factor and the peel strength are both low;

[0089] The Mg-Zr-RE alloy plate has different damping loss factors at different temperatures, and the damping loss factor is obviously improved as the temperature rises; and the damping loss factor of the intermediate viscoelastic damping layer (damping glue) is obviously reduced as the temperature rises; after the Mg-Zr-RE alloy plate and the intermediate viscoelastic damping layer are combined to form a composite magnesium plate, under the joint action of the magnesium alloy and the damping glue, the damping loss factor of the composite magnesium plate is greater than 0.3 at room temperature and in a wide temperature range of 40-120 DEG C, and the composite magnesium plate has good noise reduction effect.

[0090] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A composite magnesium plate, characterized in that, It includes a first layer of magnesium alloy plate, an intermediate viscoelastic damping layer, and a second layer of magnesium alloy plate, wherein the intermediate viscoelastic damping layer is located between the first layer of magnesium alloy plate and the second layer of magnesium alloy plate.

2. The composite magnesium plate according to claim 1, characterized in that, The thickness of the composite magnesium plate is 1.5~2.1mm.

3. The composite magnesium plate according to claim 1, characterized in that, The thickness of the first magnesium alloy plate is 0.7~1mm; And / or, the thickness of the second magnesium alloy plate is 0.7~1mm.

4. The composite magnesium plate according to any one of claims 1-3, characterized in that, The thickness of the intermediate viscoelastic damping layer is 40~80μm.

5. The composite magnesium plate according to any one of claims 1-3, characterized in that, The first layer of magnesium alloy plate includes a magnesium-nickel alloy plate and / or a magnesium-zirconium-rare earth alloy plate.

6. The composite magnesium plate according to any one of claims 1-3, characterized in that, The second layer of magnesium alloy plate includes a magnesium-nickel alloy plate and / or a magnesium-zirconium-rare earth alloy plate.

7. The composite magnesium plate according to any one of claims 1-3, characterized in that, The surface of the first magnesium alloy plate away from the intermediate viscoelastic damping layer is covered with an oxide film. And / or, the surface of the first magnesium alloy plate away from the intermediate viscoelastic damping layer is coated with resin.

8. The composite magnesium plate according to any one of claims 1-3, characterized in that, The surface of the second magnesium alloy plate away from the intermediate viscoelastic damping layer is covered with an oxide film; And / or, the surface of the second magnesium alloy plate away from the intermediate viscoelastic damping layer is coated with resin.

9. A structural component, characterized in that, The structural component includes the composite magnesium plate as described in any one of claims 1-8.

10. A terminal device, characterized in that, The terminal device includes the structural component as described in claim 9.

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