Surface shell assembly reinforcing structure

By assembling steps and installing reinforcement plate structures on the back of the surface shell of the gas water heater, the problem of the surface shell being easily twisted and damaged during use is solved, and the bending, torsion resistance and strength of the surface shell are significantly improved.

CN222651653UActive Publication Date: 2025-03-21HANGZHOU ROBAM APPLIANCES CO LTD
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Patent Information

Application Number
CN202420935743.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-30
Publication Date
2025-03-21
Estimated Expiration
2034-04-30

AI Technical Summary

Technical Problem

The surface shell of the gas water heater is easily distorted and damaged during handling and use, and it is difficult for the prior art to effectively enhance the mechanical properties of the surface shell.

Method used

The steps are equipped on both sides of the back of the face shell, and a reinforcement plate structure is installed between the steps. The reinforcement plate provides additional support to significantly increase the bending and torsion resistance of the face shell.

Benefits of technology

By strengthening the plate structure, the bending and torsion resistance of the surface shell is significantly improved, thereby enhancing the strength of the overall structure and preventing the surface shell from being twisted and damaged during use.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of water heaters, and particularly relates to a face shell assembly reinforcing structure. The surface shell assembly comprises a surface shell, mounting steps arranged on the two sides of the back of the surface shell, and step fixing holes formed in the mounting steps. The reinforcing plate unit comprises a reinforcing plate, sinking turnups arranged at the two ends of the reinforcing plate, turnup fixing holes formed in the sinking turnups, and reinforcing plate fixing nails used for being in threaded connection with the step fixing holes and the turnup fixing holes. The sinking turned-over edge is of an L-shaped structure so that the reinforcing plate can be attached to the back of the face shell. The steps are assembled on the two sides of the back of the face shell, the reinforcing plate structure is installed between the steps, the reinforcing plates provide additional support, the bending resistance and torsion resistance of the face shell are remarkably improved, and therefore the strength of the whole structure is improved.
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Description

Technical Field

[0001] The utility model belongs to the technical field of water heaters, and in particular relates to a surface shell component reinforcement structure. Background Art

[0002] A gas water heater is a household appliance that uses gas as an energy source to heat water through combustion. It is one of the common hot water solutions in the home, especially suitable for scenarios where hot water needs to be heated instantly and used in large quantities. Most gas water heaters are rectangular or square in shape and vary in size to accommodate different installation spaces and heating needs. Generally speaking, the width and height of domestic gas water heaters can range from smaller sizes (such as 30cm x 50cm) to larger sizes (such as 60cmx 80cm or larger) to meet the needs of different families. On the front or side of the gas water heater, there is usually a control panel with operating interfaces such as temperature adjustment buttons and switches. These control elements allow users to easily adjust the water temperature, view system status, etc.

[0003] With the diversity of gas water heater appearance and new material applications, more and more gas water heater operating panels are made of acrylic material. Acrylic material has good transparency and glossiness, and can be produced in various colors and textures, making the gas water heater operating panel more beautiful and stylish, and easy to integrate into the design style of modern homes.

[0004] refer to Figure 1 , demonstrated a gas water heater with an acrylic operating panel. However, the area of ​​the shell is large, and the cavity inside is large in order to install the heat exchange system. Once it is subjected to external force during transportation and use, it will be twisted, causing the shell to be damaged.

[0005] In summary, there is a need for a structure that can enhance the mechanical properties of the face shell. Utility Model Content

[0006] The utility model aims to provide a face shell assembly reinforcement structure. The utility model has steps installed on both sides of the back of the face shell, and a reinforcement plate structure is installed between the steps. The reinforcement plate significantly increases the bending and torsion resistance of the face shell by providing additional support, thereby improving the strength of the overall structure.

[0007] The technical solution adopted by the utility model to solve the above problems is: a surface shell component reinforcement structure, including:

[0008] A face shell assembly, the face shell assembly comprising a face shell, mounting steps arranged on both sides of the back of the face shell, and step fixing holes arranged on the mounting steps;

[0009] The reinforcement plate unit comprises a reinforcement plate, and sunken flanges arranged at both ends of the reinforcement plate, flange fixing holes arranged on the sunken flanges, and reinforcement plate fixing nails used for screwing the step fixing holes and the flange fixing holes; the sunken flanges are used to fit the reinforcement plate to the back of the face shell. Preferably, the sunken flanges have an L-shaped structure.

[0010] A further preferred technical solution is that: the face shell assembly also includes a step reinforcement rib arranged on the installation step; the reinforcement plate unit also includes an avoidance notch arranged on the sunken flange and used for installing the step reinforcement rib.

[0011] A further preferred technical solution is that the reinforcement plate unit also includes a rubber strip arranged between the reinforcement plate and the back of the surface shell.

[0012] A further preferred technical solution is that: the reinforcement plate unit also includes reinforcement ribs arranged on the reinforcement plate.

[0013] A further preferred technical solution is that: the reinforcement plate unit also includes reinforcement flanges arranged on both sides of the reinforcement plate.

[0014] A further preferred technical solution is that: the reinforced plate unit also includes a flange fixing hole arranged on the sunken flange, and a reinforcement plate fixing nail screwed on the flange fixing hole; the face shell assembly also includes a step fixing hole arranged on the mounting step and used to install the reinforcement plate fixing nail.

[0015] A further preferred technical solution is that it also includes a bottom shell assembly for cooperating with the surface shell assembly to install the burner heat exchange system.

[0016] A further preferred technical solution is that the face shell assembly also includes a face shell hole arranged in the face shell; and also includes a keypad unit for realizing human-computer interaction through touch, and the keypad unit is installed in the face shell hole.

[0017] A further preferred technical solution is that the keypad unit comprises a keypad, a keypad box for mounting the keypad, and keypad fixing pins for connecting the fixing holes of the keypad and the keypad box.

[0018] A further preferred technical solution is that it also includes an operation panel for covering the front side of the keypad unit.

[0019] In summary, the utility model has the following benefits:

[0020] 1. The utility model has steps installed on both sides of the back of the face shell, and a reinforcing plate structure is installed between the steps. The reinforcing plate significantly increases the bending and torsion resistance of the face shell by providing additional support, thereby improving the strength of the overall structure.

[0021] 2. The reinforcing plate of the utility model is also provided with reinforcing ribs, reinforcing flanges and other structures to further improve its strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] Figure 1 It is a three-dimensional schematic diagram of the appearance of a gas water heater with a round acrylic operating panel;

[0024] Figure 2 It is a front view schematic diagram of a gas water heater with a round acrylic operating panel;

[0025] Figure 3 This is a schematic diagram of the appearance of the face shell assembly and the operation panel;

[0026] Figure 4 for Figure 3 Schematic diagram of the section along line AA;

[0027] Figure 5 It is a schematic diagram of installing the adapter plate on the face shell assembly;

[0028] Figure 6 It is a structural schematic diagram of the face shell assembly;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the back of the face shell assembly;

[0030] Figure 8 This is an exploded view of the reinforced unit on the back of the face shell assembly;

[0031] Fig. 9 for Figure 8 A magnified schematic diagram of the middle area A;

[0032] Fig.10 An exploded schematic diagram of the components installed at the operation panel on the front of the housing assembly;

[0033] Fig.11 An exploded schematic diagram of the components installed at the operation panel on the back of the housing assembly;

[0034] Fig.12 for Fig.11 An enlarged schematic diagram of the middle operation panel;

[0035] Fig.13 It is a schematic diagram of the structure of the back of the face shell;

[0036] Fig.14 It is a structural diagram of the operation panel;

[0037] Fig.15 for Fig.14 Schematic diagram of the section along line CC;

[0038] Fig.16 It is a structural schematic diagram of the adapter board;

[0039] Fig.17 This is a schematic diagram of the structure of the enhanced version unit.

[0040] In the accompanying drawings, the components represented by each reference numeral are as follows: gas water heater 1, face shell assembly 2, bottom shell assembly 3, operation panel 5, adapter plate assembly 6, key board unit 7, reinforced plate unit 8, face shell 201, face shell hole 202, fixing claw 203, extension edge 204, anti-foolproof slot 205, installation step 206, step reinforcement rib 207, step fixing hole 208, pin slot 209, panel part 501, pin 502, chamfer 503, adapter plate 601, display area 602, notch 603, anti-foolproof buckle 604, key board 701, key board box 702, key board fixing nail 703, reinforcement plate 801, reinforcement rib 802, reinforcement flange 803, sinking flange 804, avoidance notch 805, reinforcement plate fixing nail 806, positioning flange 807, rubber strip 808. DETAILED DESCRIPTION

[0041] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0042] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0043] Example:

[0044] As attached Figure 1-17As shown, the structure of the gas water heater 1 mainly includes a bottom shell assembly 3, a burner heat exchange system and a front shell assembly 2. The front shell assembly 2 is arranged on the front of the gas water heater. The front shell is usually made of high temperature resistant and corrosion resistant materials, such as plastic or metal, to ensure that the shell remains stable and safe during long-term use, and at the same time provide a fixed structure for the operation display components. The bottom shell assembly 3 is arranged on the back of the gas water heater to provide support for the entire water heater. It not only has to carry all the components in the water heater, including the burner, heat exchange system, etc., but also needs to ensure the stability and safety of the structure. The bottom shell assembly is usually designed with sufficient ventilation holes to ensure air circulation during combustion, and also helps to dissipate heat; the bottom shell assembly is also designed with a structure for fixing and installation, so that the burner heat exchange system can be firmly installed in the predetermined position. The burner heat exchange system is the core of the gas water heater, responsible for generating heat energy and transferring this heat to the water flowing through. The burner is usually composed of one or more combustion nozzles, which mix the fuel gas with air and ignite it to generate high-temperature combustion gas; the heat exchange system is arranged around the combustion chamber, usually a series of metal pipes or plates, and the water flowing through these pipes or plates can absorb the heat generated by the combustion and thus be heated; the function of the combustion heat exchanger system 4 is to provide space for the burner and heat exchange, ensuring that the heat generated by the combustion is used to heat domestic water in the form of a heat exchanger.

[0045] The face shell assembly 2 includes a face shell 201, a face shell hole 202, and a fixing claw 203. The face shell 201 is the main part of the face shell assembly 2. The face shell hole 202 is arranged in the middle and lower part of the face shell 201 to facilitate the installation of the human-machine interaction structure of the gas water heater 1. The fixing claw 203 is provided with a fixing hole. The inner side surface of the fixing hole can be internally threaded or smooth, so as to provide an installation point for the human-machine interaction structure to be installed on the face shell hole 202. Specifically, the face shell 201 serves as the appearance and the first protective barrier of the gas water heater. Its design takes into account beauty, durability and safety. It is usually made of high-strength materials, such as high-temperature resistant plastic or metal, to ensure stability and durability in various environments; the design of the face shell may also include heat dissipation holes or grilles to promote the cooling of internal components. In addition, the shape and size of the face shell 201 will be determined according to the specific design of the water heater to adapt to different installation environments and user needs. The face shell hole 202 is located in the lower middle part of the face shell 201, and is mainly used to install the human-machine interaction structure of the gas water heater, such as a control panel or an operation interface; the purpose of the hole design is to facilitate the user to interact with the water heater, such as adjusting the temperature, turning the machine on and off, etc.; the position and size of the face shell hole 201 will be precisely designed to ensure that the human-machine interaction structure can fit tightly and provide enough space to accommodate necessary buttons, display screens and other components. The fixing claw 203 is designed on the face shell 201, and the specific position is usually on the inside of the face shell hole 202 and extends inward. Its main function is to provide one or more fixing points for installing the human-machine interaction structure on the face shell hole 202; the fixing hole on the fixing claw can be internally threaded or smooth, depending on the fixing method used when installing the human-machine interaction structure; the internally threaded design can be directly used with screws to achieve a stable connection, while the smooth design may need to be used with other types of fasteners, such as nuts or fasteners on the back, etc. Regardless of the design, the fixing claw 203 is a key component to ensure that the human-machine interaction structure is firmly installed and reduce the looseness that may be caused by vibration.

[0046] An annular extension edge 204 is provided along the inner wall of the face shell hole 202, and six fixing claws 203 are provided in an annular array on the extension edge 204, and the fixing claws 203 extend to the inner side of the face shell 201, and the adapter plate assembly 6 is bonded to the outer side of the extension edge 204 by bonding. The adapter plate assembly 6 includes an adapter plate 601, a display area 602, a notch 603 and an anti-fool buckle 604. The adapter plate 601 is the main body of the adapter plate assembly 6, and has basically the same shape as the face shell hole 202. When the face shell hole 202 is circular, the adapter plate 601 also has a circular shape. The display area 602 is a hollow area in the middle of the adapter plate 601, and its size is at least enough to expose the components operated and displayed on the key board unit 7 to the outside, so as to facilitate operation and observation. The notch 603 is arranged at the edge of the adapter plate 601, and the length of the opening along the diameter direction of the adapter plate 601 is slightly smaller than the length of the latch 502, so that the latch 502 can be inserted and engaged therein. The foolproof buckle 604 is arranged at the edge of the adapter plate 601 and is arranged toward the inside, and the upper end of the extended edge 204 is provided with a foolproof slot that matches the foolproof buckle 604. When the adapter plate 601 is installed, it is rotated in the face shell hole 202. After the foolproof buckle 604 is stuck in the foolproof slot, the display area 602 can also just match the position of the buttons and display devices on the key board 701, so as to prevent the adapter plate 601 from being installed misplaced, and also facilitate the subsequent installation process of the operation panel 5.

[0047] The operation panel 5 is a circular structure, and includes a panel member 501, a latch 502, and a chamfer 503. The front of the panel member 501 is circular and has a side. The latch 502 is arranged on the side of the panel member 501 and extends along a certain diameter of the front circle of the panel member 501. The side of the panel member 501 is provided with a chamfer 503. The existence of the chamfer 503 allows the panel member 501 to have a certain gap when installed in the face shell hole 202, ensuring that it can still be installed reliably after thermal expansion and contraction, without bulging and deformation. Specifically, the chamfer 503 is formed by beveling or rounding the side edge of the panel member 501. The chamfer design can provide a certain gap for the panel member 501, so that when the temperature changes and the size changes slightly, the panel member can adapt to the space change and avoid bulging or deformation caused by expansion. The chamfer can guide the panel member 501 to be smoothly embedded in the face shell hole, reduce friction and resistance during installation, and also avoid sharp edges from scratching other components or operators during installation.

[0048] The keypad unit 7 is an important component of the human-machine interaction system of the gas water heater. The keypad unit 7 includes a keypad 701, a keypad box 702, and a keypad fixing nail 703. The keypad 701 is an interface for the user to directly interact with the water heater. Various keys are arranged on it. These keys are used to control the switch, temperature adjustment, timing setting and other functions of the water heater. The user inputs the command for the water heater operation by pressing different buttons. The keypad is usually made of durable materials, and there may be a mark on the surface to indicate the function of each key. The keypad box 702 provides a structural carrier or shell for fixing and protecting the keypad 701. It not only plays the role of installing the keypad on the water heater, but also provides dustproof, waterproof and other protection for the keypad to extend the service life of the keypad. The keypad fixing nails 703 are used to firmly fix the keypad 701 in the keypad box 702, and directly fix the keypad 701 and the keypad box 702 to the fixing claws 203 on the shell hole 202 of the water heater. These fixing nails ensure the stability and durability of the keypad unit, ensuring that it will not become loose or damaged due to frequent operation of the keys during long-term use; the selection and design of the fixing nails are equally important to ensure that corrosion, breakage, etc. will not occur under different environmental conditions, such as temperature changes and humidity. The number of fixing claws 203 should not be less than the number of keypad fixing nails 703. For example, in this embodiment, 6 fixing claws 203 arranged in a circular array are provided on the shell hole 202, and 3 keypad fixing nails 703 are provided to fix the keypad 701 and the keypad box 702. After the key panel unit 7 is successfully installed, the panel component 501 is directly covered on the key panel 701. The keys of the key panel 701 usually use capacitive touch technology, using the human body as part of the capacitor. When the finger touches the panel component 501, it will cause slight changes in the capacitance. These changes are detected by the circuit and converted into electrical signals, thereby identifying the touch position and operation intention.

[0049] The reinforcement plate unit 8 includes a reinforcement plate 801, reinforcement ribs 802, reinforcement flanges 803, sinking flanges 804, avoidance notches 805, reinforcement plate fixing nails 806, positioning flanges 807 and rubber strips 808. The reinforcement plate 801 is fixed on the mounting step 206 on the back of the face shell 201, and its main function is to support the strength of the face shell 201 body, that is, in daily use of the device or in unexpected situations, the reinforcement plate 801 can effectively disperse the impact force or pressure, reduce the chance of these forces acting directly on the face shell 201, and prevent the face shell from deforming during an accidental fall. The reinforcing rib 802 is arranged in the middle of the reinforcing plate 801 and along the extension direction of the reinforcing plate 801. The reinforcing rib 802 has a thicker thickness. The reinforcing rib 802 is arranged to further improve the structural strength and rigidity of the reinforcing plate 801. The reinforcing rib 802 forms a "skeleton" in the middle of the reinforcing plate 801 through its thicker thickness. This design greatly improves the bearing capacity and bending resistance of the entire reinforcing plate; when facing external forces (such as impact, pressure, etc.), the reinforcing rib can effectively disperse and transmit these forces, reduce material deformation or damage caused by local stress concentration, and the reinforcing rib 802 is arranged along the extension direction of the reinforcing plate 801, which can promote a more even distribution of force on the reinforcing plate. This even distribution helps to reduce the damage that may occur due to excessive local force and improve the stability and durability of the entire structure. The reinforcing flange 803 is arranged on both sides of the reinforcing plate 801 and along the extension direction of the reinforcing plate 801. The reinforcing rib 802 has a thicker thickness. Similar to the reinforcing rib 802, the strong flange 803 increases the edge rigidity of both sides of the reinforcing plate 801, which helps to resist edge deformation caused by external forces (such as impact, pressure). This edge reinforcement design is very important for maintaining the straight shape of the overall structure and preventing distortion, especially when the reinforcing plate 801 is long. The reinforcing flange 803 not only enhances the rigidity of the edge, but also expands the stress distribution to a wider area of ​​the reinforcing plate 801, thereby improving the structural strength of the entire reinforcing plate in conjunction with the reinforcing rib 802. The sunken flange 804 is arranged at both ends of the reinforcing plate 801. The sunken flange 804 has an L-shaped structure. The lower end of the sunken flange 804 is connected to the end of the reinforcing plate 801, so that it can better fit on the back of the face shell 201. Through the connection with the end of the reinforcing plate 801 and its L-shaped structure, the design of the sunken flange 804 can ensure that the connection between the reinforcing plate 801 and the face shell 201 is tighter and more stable. This tight connection improves the stability of the overall structure and reduces the loose connection caused by long-term use or external forces.

[0050] The installation step 206 is also provided with a step reinforcement rib 207 and a step fixing hole 208. The step reinforcement rib 207 prevents the installation step 206 from being easily deformed. The same number of avoidance notches 805 are provided at the sinking flange 804 corresponding to the step reinforcement rib 207 to prevent the step reinforcement rib 207 from affecting the installation between the sinking flange 804 and the installation step 206. After installation, the step reinforcement rib 207 and the avoidance notch 805 are stuck together, further strengthening the stability of the reinforcement plate 801 after installation. The sinking flange 804 is also provided with a flange fixing hole. The reinforcement plate fixing nail 806 is installed in the flange fixing hole and is used to be screwed to the step fixing hole 208 on the installation step 206, so that the reinforcement plate 801 is firmly installed on the back of the face shell 201. The positioning flaps 807 are respectively arranged on the upper and lower sides of the sunken flanges 804 at both ends, so that the positioning flaps 807 can be respectively stuck on the upper and lower sides of the installation steps 206 during installation, so that the reinforcing plate 801 is positioned on the line connecting the centers of the installation steps 206 on both sides. The rubber strip 808 is mainly used to fill the gap between the back of the face shell 201 and the reinforcing plate 801 to ensure strong support between the reinforcing plate 801 and the back of the face shell.

[0051] In summary, the installation process of the operation panel 5, the adapter board assembly 6 and the key board unit 7 on the face shell assembly 2 includes the following steps:

[0052] S11. The back of the adapter plate 601 is pressed against the front of the extended edge 204, and the adapter plate 601 is rotated so that the anti-fool buckle 604 is buckled in the anti-fool slot 205;

[0053] S12. Insert the latch 502 on the panel member 501 into the notch 603 and the latch slot 209, and bond the back of the panel member 501 to the bonding area of ​​the adapter plate 601;

[0054] S13. The keypad 701 is mounted in the keypad box 702 with the back facing inward and fixed by the keypad fixing pins 703;

[0055] S14. Screw the key plate fixing nail 703 onto the fixing claw 203 .

[0056] The installation process of the reinforced plate unit 8 on the face shell assembly 2 includes the following steps:

[0057] S21. By aligning the positioning flanges 807 on both sides, the sinking flanges 804 at both ends of the reinforcing plate 801 are buckled on the mounting steps 206 on both sides of the back of the surface shell 201;

[0058] S22. The rubber strip 808 is inserted under the reinforcing plate 801, and the avoidance notch 805 is aligned with the step reinforcing rib 207 and buckled;

[0059] S23. Screw the reinforcing plate fixing nails 806 onto the step fixing holes 208 and the flange fixing holes to complete the installation.

[0060] In addition, the same or similar element symbols are used to refer to the same or similar parts or steps in the drawings and descriptions as much as possible. The drawings are presented in simplified form and are not drawn to exact scale. For convenience and clarity only, directional terms such as top, bottom, left, right, upward, above, above, below, below, front and back may be used with respect to the drawings. These and similar directional terms should not be construed as limiting the scope of the present disclosure in any way.

Claims

1. A face shell component reinforcement structure, characterized in that: include: A face shell assembly (2), the face shell assembly (2) comprising a face shell (201), mounting steps (206) arranged on both sides of the back of the face shell (201), and step fixing holes (208) arranged on the mounting steps (206); The reinforcement plate unit (8) comprises a reinforcement plate (801), sunken flanges (804) arranged at both ends of the reinforcement plate (801), flange fixing holes arranged on the sunken flanges (804), and reinforcement plate fixing nails (806) used for screwing the step fixing holes (208) and the flange fixing holes; the sunken flanges (804) are used to fit the reinforcement plate (801) to the back of the face shell (201).

2. A face shell assembly reinforcement structure according to claim 1, characterized in that: The face shell assembly (2) further includes a step reinforcement rib (207) disposed on the mounting step (206); the reinforcement plate unit (8) further includes an avoidance notch (805) disposed on the sunken flange (804) and used for mounting the step reinforcement rib (207).

3. A face shell assembly reinforcement structure according to claim 1, characterized in that: The reinforcing plate unit (8) further comprises a rubber strip (808) arranged between the reinforcing plate (801) and the back of the surface shell (201).

4. A face shell assembly reinforcement structure according to claim 1, characterized in that: The reinforcing plate unit (8) further comprises reinforcing ribs (802) arranged on the reinforcing plate (801).

5. A face shell assembly reinforcement structure according to claim 1, characterized in that: The reinforcing plate unit (8) further comprises reinforcing flanges (803) arranged on both sides of the reinforcing plate (801).

6. A face shell assembly reinforcement structure according to claim 1, characterized in that: The reinforcing plate unit (8) also includes a flange fixing hole arranged on the sunken flange (804), and a reinforcing plate fixing nail (806) screwed on the flange fixing hole; the face shell assembly (2) also includes a step fixing hole (208) arranged on the mounting step (206) and used for mounting the reinforcing plate fixing nail (806).

7. A face shell assembly reinforcement structure according to claim 1, characterized in that: It also includes a bottom shell assembly (3) for cooperating with the surface shell assembly (2) to install a burner heat exchange system.

8. A face shell assembly reinforcement structure according to claim 1, characterized in that: The face shell assembly (2) further includes a face shell hole (202) arranged on the face shell (201); and further includes a keypad unit (7) for realizing human-computer interaction through touch, wherein the keypad unit (7) is installed in the face shell hole (202).

9. A face shell assembly reinforcement structure according to claim 8, characterized in that: The keypad unit (7) comprises a keypad (701), a keypad box (702) for mounting the keypad (701), and keypad fixing pins (703) for connecting the fixing holes of the keypad (701) and the keypad box (702).

10. A face shell assembly reinforcement structure according to claim 8, characterized in that: It also comprises an operation panel (5) for covering the front side of the key board unit (7).