Payment terminal

Abstract

The utility model is suitable for financial equipment technical field, provide a kind of payment terminal, above-mentioned payment terminal includes main casing and tax control module, tax control module is set to the inside of main casing, main casing includes the bottom shell and face shell of buckling arrangement.In the bottom portion of bottom shell there is first plug-in part, second plug-in part is on face shell, first plug-in part and second plug-in part are mutually inserted and fixed in along first direction, so that the bottom portion between bottom shell and face shell can keep relative fixation in the direction except first direction.Can be connected by limiting structure the head of bottom shell and face shell each other, also can prevent first plug-in part and second plug-in part mutually open along first direction, so that the bottom portion between bottom shell and face shell is also fixed each other, can make bottom shell and face shell in bottom portion and head etc. multiple positions are fixed, avoid the risk that main casing has been pried open, and then the risk that the financial transaction data of tax control module in main casing is stolen can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of financial equipment technology, and in particular relates to a payment terminal. Background Technology

[0002] A payment terminal is a specialized device used to complete fund transactions, its core function being to connect consumers, merchants, and payment institutions. It not only solves the inconvenience of cash transactions but also supports various digital payment methods through technological iterations, becoming an indispensable financial tool in business operations. As a carrier of financial interaction, the information security of payment terminals is particularly important. However, existing payment terminals suffer from the vulnerability of their tax control module's financial transaction data to theft, seriously impacting their security. Utility Model Content

[0003] The purpose of this utility model is to provide a payment terminal that solves the technical problem that the financial transaction data of the tax control module of the existing payment terminal is easily stolen during use.

[0004] This utility model is implemented as follows: a payment terminal is provided, which includes a main housing and a tax control module. The tax control module is disposed inside the main housing. The main housing includes a bottom shell and a front shell that are snapped together. The bottom of the bottom shell has a first insertion part, and the front shell has a second insertion part. The first insertion part and the second insertion part are inserted and fixed to each other along a first direction. A limiting structure is also provided between the head of the bottom shell and the front shell. The limiting structure is used to prevent the first insertion part and the second insertion part from separating from each other. The limiting structure is also used to connect the head of the bottom shell and the front shell.

[0005] In one optional embodiment, the limiting structure includes a stamp holder, a fastener, and a sealing material. The stamp holder is disposed along a second direction, simultaneously penetrating the bottom shell and the top shell. The second direction forms an angle with the first direction. The stamp holder has an anti-tampering groove. The fastener is disposed through the bottom surface of the anti-tampering groove. The limiting cap of the fastener is located inside the anti-tampering groove and is pressed against the bottom surface of the anti-tampering groove. The other end of the fastener is located outside the anti-tampering groove for fixing the component connection. The sealing material is filled inside the anti-tampering groove to cover the limiting cap, and an anti-tampering mark is provided on the surface of the sealing material.

[0006] In one optional embodiment, the face shell has a first mounting hole, the bottom shell has a second mounting hole, and the first mounting hole and the second mounting hole are coaxially arranged, and the stamp holder is simultaneously inserted into the first mounting hole and the second mounting hole.

[0007] In an optional embodiment, the stamp holder is further provided with a limiting protrusion, which is disposed on the outer periphery of the stamp holder. When the stamp holder is inserted into the first mounting hole, the limiting protrusion abuts against the side of the face shell that is away from the bottom shell.

[0008] In an optional embodiment, a limiting blocking part is also provided on the wall of the second mounting hole, and a stepped structure is also provided on the outer periphery of the stamp holder. When the stamp holder is inserted into the second mounting hole, the stepped structure and the limiting blocking part abut against each other.

[0009] In an optional embodiment, the limiting structure further includes a fixing plate, which is fixed inside the main housing, and the fastener is threadedly connected to the fixing plate.

[0010] In an optional embodiment, the first insertion portion includes a buckle disposed on the bottom shell, and the second insertion portion includes an insertion hole disposed on the front shell.

[0011] In an optional embodiment, a protective mounting cylinder is further provided on the inner wall of the bottom shell, and the tax control module is accommodated and installed inside the protective mounting cylinder.

[0012] In an optional embodiment, the protective mounting cylinder is provided with a sealing material, which fills the area of ​​the protective mounting cylinder excluding the tax control module.

[0013] In an optional embodiment, the payment terminal further includes a first circuit board disposed inside the main housing, the first circuit board being fixedly connected to the bottom housing, and at least a portion of the first circuit board covering the opening of the protective mounting cylinder.

[0014] The technical advantages of this invention compared to existing technologies are as follows: a main housing is formed by interlocking a bottom shell and a top shell, and the tax control module is housed within the main housing, which protects the tax control module. Simultaneously, a first insertion portion is located at the bottom of the bottom shell, and a second insertion portion is located on the top shell. The first and second insertion portions are interlocked and fixed along a first direction, ensuring that the bottom of the bottom shell and the top shell remain relatively fixed in directions other than the first direction. Furthermore, a limiting structure is provided between the head of the bottom shell and the front shell. This limiting structure connects the head of the bottom shell and the front shell, while also preventing the first and second plug-in parts from separating along the first direction. This also fixes the bottom of the bottom shell and the front shell together. Compared with existing payment terminals, the combination of the first plug-in part, the second plug-in part, and the limiting structure allows the bottom shell and the front shell to be fixed at multiple locations, such as the bottom and head. This makes the connection between the bottom shell and the front shell more robust and reliable, avoiding the risk of the main shell being pried open. It also reduces the risk of transaction data from the tax control module inside the main shell being stolen, thus improving the security of the payment terminal. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the payment terminal provided in this embodiment of the utility model; Figure 2 This is a front view structural diagram of the payment terminal provided in this embodiment of the utility model; Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure along line AA; Figure 4 yes Figure 3 Enlarged structural diagram at point C; Figure 5 yes Figure 2 Schematic diagram of the cross-sectional structure along line BB; Figure 6 yes Figure 5 Enlarged structural diagram at point D; Figure 7 This is a schematic diagram of the bottom shell provided in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Main housing; 2. Tax control module; 3. Bottom housing; 31. Second mounting hole; 32. Limiting and blocking part; 4. Front housing; 41. First mounting hole; 5. First insertion part; 51. Snap-fit; 6. Second insertion part; 61. Insertion hole; 7. Limiting structure; 71. Stamp holder; 711. Limiting protrusion; 712. Step structure; 72. Fastener; 73. Anti-tamper groove; 74. Fixing plate; 8. Protective mounting cylinder; 9. First circuit board. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In this embodiment, according to Figure 1 The XYZ Cartesian coordinate system established in this paper is defined as follows: the X-axis can be the first direction, the Y-axis can be the second direction, and the Z-axis can be the third direction. The side located in the positive direction of the X-axis is defined as front, and the side located in the negative direction of the X-axis is defined as back; the side located in the positive direction of the Y-axis is defined as left, and the side located in the negative direction of the Y-axis is defined as right; the side located in the positive direction of the Z-axis is defined as up, and the side located in the negative direction of the Z-axis is defined as down.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] Please refer to Figures 1 to 4 As shown in this embodiment of the utility model, a payment terminal is provided. The payment terminal includes a main housing 1 and a tax control module 2. The tax control module 2 is disposed inside the main housing 1. The main housing 1 includes a bottom shell 3 and a front shell 4 that are fastened together. The bottom of the bottom shell 3 has a first insertion part 5, and the front shell 4 has a second insertion part 6. The first insertion part 5 and the second insertion part 6 are inserted and fixed to each other along a first direction. A limiting structure 7 is also provided between the head of the bottom shell 3 and the front shell 4. The limiting structure 7 is used to prevent the first insertion part 5 and the second insertion part 6 from separating from each other. The limiting structure 7 is also used to connect the head of the bottom shell 3 and the front shell 4.

[0022] Specifically, the main shell 1 refers to a shell-shaped component with a certain accommodating space. The bottom shell 3 and the top shell 4 are the two parts that make up the main shell 1, and the bottom shell 3 and the top shell 4 can be interlocked to form the main shell 1. The tax control module 2 is a core component specifically used to realize tax supervision functions. The tax control module 2 can be electrically connected to the circuit board during operation. The first plug-in part 5 and the second plug-in part 6 are components that can fix two objects to each other through plugging and mating. The first plug-in part 5 can be plate-shaped, column-shaped, or a hole structure with a certain depth. For example, when the first plug-in part 5 is a plate-shaped or column-shaped structure, the second plug-in part 6 can be a hole structure with a certain depth. When the first plug-in part 5 is a hole structure with a certain depth, the second plug-in part 6 can be a plate-shaped or column-shaped structure. The limiting structure 7 is a structure or component that can connect two objects. The limiting structure 7 can achieve the connection between the two components through plugging, snapping, or bonding.

[0023] It should be noted that the payment terminal may also include magnetic head assembly, circuit board, display screen and printing device, etc., and their specific structures are all conventional technical means well known to those skilled in the art.

[0024] The payment terminal provided in this embodiment of the utility model consists of a main housing 1 formed by the interlocking of a bottom shell 3 and a front shell 4, and a tax control module 2 is disposed inside the main housing 1, which protects the tax control module 2. The bottom shell 3 has a first insertion part 5 at its bottom, and the front shell 4 has a second insertion part 6. The first insertion part 5 and the second insertion part 6 are interlocked and fixed along a first direction, so that the bottom of the bottom shell 3 and the front shell 4 can remain relatively fixed in directions other than the first direction. Furthermore, a limiting structure 7 is provided between the head of the bottom shell 3 and the front shell 4. The limiting structure 7 can connect the head of the bottom shell 3 and the front shell 4 to each other, and at the same time prevent the first plug-in part 5 and the second plug-in part 6 from separating from each other along the first direction. This also fixes the bottom of the bottom shell 3 and the front shell 4 to each other. Compared with the payment terminals in the prior art, the cooperation of the first plug-in part 5, the second plug-in part 6 and the limiting structure 7 can fix the bottom shell 3 and the front shell 4 at multiple positions such as the bottom and the head, making the connection between the bottom shell 3 and the front shell 4 more solid and reliable. This avoids the risk of the main shell 1 being pried open, thereby reducing the risk of the financial transaction data of the tax control module 2 inside the main shell 1 being stolen and improving the security of the payment terminal.

[0025] In one embodiment, see Figure 5 and Figure 6 The limiting structure 7 includes a stamp holder 71, a fastener 72, and a sealing material (not shown in the figure). The stamp holder 71 is disposed along the second direction, simultaneously penetrating the bottom shell 3 and the top shell 4. The second direction is set at an angle to the first direction. The stamp holder 71 has an anti-tampering groove 73. The fastener 72 is disposed through the bottom surface of the anti-tampering groove 73. The limiting cap of the fastener 72 is located inside the anti-tampering groove 73 and is pressed against the bottom surface of the anti-tampering groove 73. The other end of the fastener 72 is located outside the anti-tampering groove 73 for fixing the component connection. The sealing material is filled inside the anti-tampering groove 73 to seal the limiting cap, and an anti-tampering mark is provided on the surface of the sealing material.

[0026] Specifically, the stamp holder 71 refers to a component with a certain volume, which can be columnar, block-shaped, or plate-shaped. The tamper-proof groove 73 refers to a groove structure with a certain depth; when the stamp holder 71 is columnar, the tamper-proof groove 73 can be recessed into one end face of the stamp holder 71. The fastener 72 refers to a component that can connect two parts; the fastener 72 can be a screw, etc. The sealing material refers to a material that can be filled into the tamper-proof groove 73 in a fluid state and fixed in the tamper-proof groove 73 after curing; the sealing material can be tin, etc. The tamper-proof mark refers to a groove structure with a certain shape; the shape of the tamper-proof mark can be freely set according to the situation.

[0027] In this embodiment, at least a portion of the bottom shell 3 and the top shell 4 can overlap each other along the second direction, allowing the stamp holder 71 to simultaneously penetrate both the bottom shell 3 and the top shell 4 along the second direction. By simultaneously penetrating both the bottom shell 3 and the top shell 4 along the second direction, and then fixing the stamp holder 71 with fasteners 72, the bottom shell 3 and the top shell 4 can be kept fixed in directions other than the second direction. Furthermore, the insertion and engagement of the first insertion part 5 and the second insertion part 6 ensures that the bottom shell 3 and the top shell 4 remain fixed in all directions, making the fixation more secure.

[0028] Furthermore, the stamp holder 71 has an anti-tampering groove 73. When the fastener 72 secures the stamp holder 71, the fastener 72 can penetrate the bottom surface of the anti-tampering groove 73. The limiting cap of the fastener 72 is located inside the anti-tampering groove 73 and pressed against the bottom surface of the anti-tampering groove 73, while the other end of the fastener 72 is located outside the anti-tampering groove 73. Simultaneously, after the fastener 72 is installed, a sealing material is filled into the anti-tampering groove 73 to seal the fastener 72. The fastener 72 cannot be removed without damaging the sealing material, the stamp holder 71 cannot be removed without removing the fastener 72, and the first insertion part 5 cannot be separated from the second insertion part 6 without removing the stamp holder 71. This makes the connection between the bottom shell 3 and the front shell 4 more secure, improving the security of the information in the tax control module 2.

[0029] Finally, tamper-evident markings are provided on the surface of the sealing material. These markings can be printed on the surface of the sealing material before it cures. By checking whether the tamper-evident markings are intact, it can be determined whether the sealing material has been opened and then resealed, further improving the security of the seal.

[0030] In an optional embodiment, please refer to Figure 6 Lead can be used as the sealing material. Lead itself has low hardness; it can undergo irreversible deformation or breakage under even small external forces, and cannot be easily restored to its original state. Anyone can visually identify that it has been tampered with, preventing counterfeiting. At the same time, lead has a low melting point, making the sealing material easier to process and manufacture. Finally, lead is inexpensive; using lead as the sealing material can significantly reduce the processing costs of payment terminals.

[0031] In one embodiment, see Figure 6The front shell 4 has a first mounting hole 41, and the bottom shell 3 has a second mounting hole 31. The first mounting hole 41 and the second mounting hole 31 are coaxially arranged, and the stamp holder 71 is simultaneously inserted into both the first mounting hole 41 and the second mounting hole 31. Specifically, both the first mounting hole 41 and the second mounting hole 31 refer to hole structures with a certain depth. The first mounting hole 41 can penetrate the side wall of the front shell 4, and the second mounting hole 31 can also penetrate the side wall of the bottom shell 3. In this embodiment, the front shell 4 has a first mounting hole 41, and the bottom shell 3 has a second mounting hole 31, and the first mounting hole 41 and the second mounting hole 31 are coaxially arranged. The stamp holder 71 can be simultaneously inserted into both the first mounting hole 41 and the second mounting hole 31, and the stamp holder 71 limits the front shell 4 and the bottom shell 3, making it easier for the stamp holder 71 to penetrate both the front shell 4 and the bottom shell 3, and also making the installation of the stamp holder 71 more convenient.

[0032] In one embodiment, see Figure 6 The stamp holder 71 is also provided with a limiting protrusion 711, which is disposed on the outer periphery of the stamp holder 71. When the stamp holder 71 is inserted into the first mounting hole 41, the limiting protrusion 711 abuts against the side of the face shell 4 away from the bottom shell 3. Specifically, the limiting protrusion 711 refers to a component with a certain volume, which can be annular or block-shaped. For example, when the limiting protrusion 711 is annular, it can be arranged around the outer periphery of the stamp holder 71. When the limiting protrusion 711 is block-shaped, there can be multiple limiting protrusions 711, all of which can be disposed on the outside of the stamp holder 71, and the multiple limiting protrusions 711 are spaced apart around the axis of the stamp holder 71. In this embodiment, a limiting protrusion 711 is provided on the stamp holder 71. The limiting protrusion 711 is disposed on the outer periphery of the stamp holder 71. When the stamp holder 71 is inserted into the first mounting hole 41, the limiting protrusion 711 abuts against the side of the face shell 4 away from the bottom shell 3. The limiting protrusion 711 can limit the stamp holder 71, making the stamp holder 71 installed more stably in the first mounting hole 41 and the second mounting hole 31, and also making the installation position of the stamp holder 71 more accurate.

[0033] In an optional embodiment, please refer to Figure 6 The limiting protrusion 711 can be integrally formed with the seal base 71, for example by casting or stamping, to make the structure of the seal base 71 more robust.

[0034] In one embodiment, see Figure 6The second mounting hole 31 has a limiting stop 32 on its wall, and the stamp holder 71 has a stepped structure 712 on its outer periphery. When the stamp holder 71 is inserted into the second mounting hole 31, the stepped structure 712 and the limiting stop 32 abut against each other. Specifically, the limiting stop 32 refers to a component with a certain volume, which can be block-shaped or plate-shaped. The limiting stop 32 can be integrally formed with the bottom shell 3. The stepped structure 712 refers to a structure composed of multiple planes. In this embodiment, by providing a limiting stop 32 on the wall of the second mounting hole 31 and a stepped structure 712 on the outer periphery of the stamp holder 71, the stepped structure 712 abuts against the limiting stop 32 when the stamp holder 71 is inserted into the second mounting hole 31, thereby limiting the stamp holder 71 in the axial direction of the second mounting hole 31, making the stamp holder 71 more firmly installed and its position more accurate.

[0035] In one embodiment, see Figure 5 and Figure 6 The limiting structure 7 also includes a fixing plate 74, which is fixed inside the main housing 1. Fasteners 72 are threadedly connected to the fixing plate 74. Specifically, the fixing plate 74 refers to a plate-like structure with a certain area. The fixing plate 74 can be fixed to the inner wall of the main housing 1, or it can be fixed to other components of the main housing 1, such as the side of the printing device. In this embodiment, by also fixing the fixing plate 74 inside the main housing 1, the fasteners 72 can be threadedly connected to the fixing plate 74 during installation, thereby making the installation and fixing of the stamp holder 71 more secure, and further making the connection between the bottom shell 3 and the top shell 4 more secure.

[0036] In one embodiment, see Figure 4 The first insertion part 5 includes a buckle 51 disposed on the bottom shell 3, and the second insertion part 6 includes an insertion hole 61 disposed on the front shell 4. Specifically, the buckle 51 refers to a component with a certain length, one end of which is connected to the bottom shell 3, and the other end of which extends away from the bottom shell 3. The buckle 51 can be integrally formed with the bottom shell 3, for example, by integral injection molding. The insertion hole 61 refers to a hole structure with a certain depth, and the position of the insertion hole 61 matches the position of the buckle 51. In this embodiment, the buckle 51 can be arranged along the first direction. When the bottom shell 3 and the front shell 4 are fastened together, the buckle 51 is inserted into the insertion hole 61 along the first direction, and the buckle 51 is limited by the side wall of the insertion hole 61, thereby achieving the purpose of fixing the bottom of the bottom shell 3 and the front shell 4 together, making the mutual fixation between the bottom shell 3 and the front shell 4 more convenient and more secure.

[0037] In one embodiment, see Figure 2 and Figure 7The inner wall of the bottom shell 3 is also provided with a protective mounting cylinder 8, in which the tax control module 2 is housed and installed. Specifically, the protective mounting cylinder 8 is a cylindrical structure of a certain length, with one end connected to the inner wall of the bottom shell 3 and the other end having an opening. In this embodiment, the tax control module 2 can be installed into the protective mounting cylinder 8 through the opening at the end of the protective mounting cylinder 8. By protecting the tax control module 2 with the side wall of the protective mounting cylinder 8, it is possible to prevent criminals from using probes or other tools to contact the tax control module 2 and steal transaction and tax data from it, thereby increasing the protection of the tax control module 2 and improving the security of the payment terminal.

[0038] In an optional embodiment, please refer to Figure 7 The protective mounting cylinder 8 can be integrally formed with the bottom shell 3, for example, by injection molding, so that the connection between the bottom shell 3 and the protective mounting cylinder 8 is more secure.

[0039] In one embodiment, see Figure 7 The protective mounting cylinder 8 contains sealing material, which fills the area of ​​the protective mounting cylinder 8 excluding the tax control module 2. Specifically, the sealing material refers to a material that can fill a designated space, such as epoxy resin. During filling, the sealing material is in a fluid state, and after filling, it gradually solidifies over a period of time, thereby sealing the tax control module 2 inside the protective mounting cylinder 8. This further improves the physical isolation performance of the tax control module 2, preventing criminals from stealing transaction and tax data from the tax control module 2 and enhancing the security of the payment terminal.

[0040] In one embodiment, see Figure 7 The payment terminal also includes a first circuit board 9, which is disposed inside the main housing 1 and fixedly connected to the bottom housing 3. At least a portion of the first circuit board 9 covers the opening of the protective mounting cylinder 8. Specifically, the first circuit board 9 refers to a plate-shaped component that can carry and electrically connect electrical components. The first circuit board 9 can be connected to the bottom housing 3 by means of snap-fit, fastener 72, or adhesive. In this embodiment, by fixing the first circuit board 9 to the bottom housing 3 and covering at least a portion of the first circuit board 9 with the opening of the protective mounting cylinder 8, the opening of the protective mounting cylinder 8 can be protected, improving the protection of the tax control module 2 and thus enhancing the security of the payment terminal.

[0041] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. A payment terminal, characterized in that, The device includes a main housing and a tax control module, with the tax control module disposed inside the main housing. The main housing includes a bottom shell and a top shell that are snapped together. The bottom of the bottom shell has a first insertion part, and the top shell has a second insertion part. The first insertion part and the second insertion part are inserted and fixed to each other along a first direction. A limiting structure is also provided between the head of the bottom shell and the top shell. The limiting structure is used to prevent the first insertion part and the second insertion part from separating from each other, and the limiting structure is also used to connect the head of the bottom shell and the top shell.

2. The payment terminal as described in claim 1, characterized in that, The limiting structure includes a stamp holder, a fastener, and a sealing material. The stamp holder is disposed along a second direction, penetrating both the bottom shell and the top shell. The second direction forms an angle with the first direction. The stamp holder has an anti-tampering groove. The fastener penetrates the bottom surface of the anti-tampering groove. The limiting cap of the fastener is located inside the anti-tampering groove and is pressed against the bottom surface of the anti-tampering groove. The other end of the fastener is located outside the anti-tampering groove for fixing the component connection. The sealing material is filled inside the anti-tampering groove to cover the limiting cap, and an anti-tampering mark is provided on the surface of the sealing material.

3. The payment terminal as described in claim 2, characterized in that, The faceplate has a first mounting hole, the bottom shell has a second mounting hole, and the first mounting hole and the second mounting hole are coaxially arranged, and the stamp holder is simultaneously inserted into the first mounting hole and the second mounting hole.

4. The payment terminal as described in claim 3, characterized in that, The stamp holder is also provided with a limiting protrusion. The limiting protrusion is provided on the outer periphery of the stamp holder. When the stamp holder is inserted into the first mounting hole, the limiting protrusion abuts against the side of the face shell that is away from the bottom shell.

5. The payment terminal as described in claim 4, characterized in that, The second mounting hole is also provided with a limiting blocking part on the hole wall, and the outer periphery of the stamp holder is also provided with a stepped structure. When the stamp holder is inserted into the second mounting hole, the stepped structure and the limiting blocking part abut against each other.

6. The payment terminal as described in claim 2, characterized in that, The limiting structure also includes a fixing plate, which is fixed inside the main housing, and the fastener is threadedly connected to the fixing plate.

7. The payment terminal as described in claim 1, characterized in that, The first insertion part includes a buckle disposed on the bottom shell, and the second insertion part includes an insertion hole disposed on the front shell.

8. The payment terminal as described in any one of claims 1 to 7, characterized in that, A protective mounting cylinder is also provided on the inner wall of the bottom shell, and the tax control module is housed and installed inside the protective mounting cylinder.

9. The payment terminal as described in claim 8, characterized in that, The protective mounting cylinder is provided with sealing material, which fills the area of ​​the protective mounting cylinder excluding the tax control module.

10. The payment terminal as described in claim 8, characterized in that, The payment terminal also includes a first circuit board, which is disposed inside the main housing and is fixedly connected to the bottom housing. At least a portion of the first circuit board covers the opening of the protective mounting cylinder.

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