Patent Description:
This application relates to the field of communication device technologies, and in particular, to a terminal device.

As people have diversified requirements for application scenarios of terminals such as a mobile phone, a tablet, and a notebook computer, waterproof and sealing performance indicators of the terminals are also continuously improving. A waterproof and sealing level of a terminal that is positioned as a high-end product even needs to reach at least an IPX7 level.

However, a waterproof and sealing design that can reach at least the IPX7 level is usually implemented by improving waterproof and sealing performance of components such as an interface component exposed to a housing of a terminal. This also leads to high waterproof and sealing costs of the terminal, and is not conducive to controlling manufacturing costs of the terminal.

<CIT> provides a waterproof metal shell (<CIT> provides a mobile phone case with the same features). The waterproof metal shell includes a body portion, a fence portion, a partition portion and a cable assembly; the fence portion integrally extends upward from the outer periphery of the body portion; the partition portion divides the body portion into a first region and a second region; the cable assembly is electrically connected with the first region and the second region; by means of the fence portion and the partition portion, the first region forms an enclosed space at a plane where the length and width of the body portion are located; a connector assembly is installed in the second region; the second region is communicated with the outside; and the cable assembly passes through the partition portion so as to electrically connect the connector assembly in the second region to the first region. The waterproof metal shell is used for a mobile phone, a tablet computer, and the like, and has waterproof performance.

<CIT> discloses a waterproof structure for a portable electronic device, which includes a housing, an interface member, a waterproof circuit board, a chamber, and a main circuit board. The housing has a bottom wall and a peripheral wall around the bottom wall, the bottom wall has an enclosure formed thereon, the peripheral wall defines a connecting hole through to the enclosure. The interface member has an interconnect inlet, the interface member is placed into a chamber, the interconnect inlet aligns with the connecting hole, the waterproof circuit board engages in the enclosure to prevent vapors or dust enter into the main circuit board, the waterproof circuit board also electronically connect the main circuit board.

An objective of embodiments of this application is to provide a terminal device, to implement a high waterproof and sealing level at low costs.

To achieve the above objective, a technical solution used in this application is that: A terminal device includes a housing, a circuit board, and an interface component. The circuit board is disposed in the housing. An isolation groove is formed in an inner wall of the housing. The isolation groove has a first opening, and the first opening is exposed to the housing. The interface component is sealed in the isolation groove through a sealing kit. The interface component is electrically connected to the circuit board, and an interface end of the interface component is exposed to the first opening. The sealing kit further includes a sealing glue, and the sealing glue is filled in the isolation groove. The interface component is sealed in the sealing glue.

Since the isolation groove is formed in the inner wall of the housing of the terminal device provided in this embodiment of this application, and the interface component is sealed in the isolation groove, a separate assembly space independent of the circuit board is formed in the isolation groove in the housing. Moreover, since the interface component is sealed in the isolation groove, a good waterproof effect is implemented between the interface component and the circuit board. In this case, even if liquid infiltrates the interface component from an interface end exposed to the housing, due to isolation of the sealing kit in the isolation groove, it is difficult for the liquid to overflow from the isolation groove to the circuit board, so that a good waterproof effect of the terminal device is implemented, and a waterproof and sealing level of the terminal device can reach at least an IPX7 level. However, a waterproof solution of the terminal device is implemented by forming the isolation groove in the inner wall of the housing, and sealing the interface component in the isolation groove. Because waterproof performance of the interface component is not required, the interface component may be a non-waterproof component, so that waterproof and sealing costs of the terminal device are well reduced, and the terminal device implements a good waterproof and sealing effect at low costs.

Optionally, a frame may be disposed in the housing, and the circuit board is fixed in the frame. The isolation groove is enclosed with an outer wall of the frame and the inner wall of the housing.

Optionally, the isolation groove has a second opening, and the second opening is located inside the housing. The sealing kit includes a sealing plate, and the sealing plate covers the second opening and is configured to seal the second opening.

Optionally, the sealing plate includes a main body and engaging lugs. The main body is disposed at the second opening. A gap is formed between a peripheral edge of the main body and a groove wall of the isolation groove, and the gap is filled with a waterproof glue. The engaging lugs are connected to an edge of the main body and are connected to the circuit board through screws.

Optionally, a support stand is disposed at a position that is on the groove wall of the isolation groove and that is close to the second opening, and the peripheral edge of the main body is disposed on the support stand. The engaging lugs may be flake-like objects and are connected to the edge of the main body, and the engaging lugs may be integrally formed with the main body.

For example, the waterproof glue may be filled in the gap between the main body and the groove wall of the isolation groove.

For example, the support stand may be suspended on the groove wall of the isolation groove, so that the support stand may not occupy assembly space inside the isolation groove, thereby leaving enough space for mounting the interface component in the isolation groove.

Optionally, the support stand may alternatively be formed by forming a step at a position that is on the groove wall of the isolation groove and that is close to the second opening. In this case, when the support stand presses against the main body, stability of supporting the main body can be well improved.

Optionally, the sealing plate includes a main body and engaging lugs. The main body is disposed at the second opening. A support stand is disposed at a position that is on the groove wall of the isolation groove and that is close to the second opening, and a peripheral edge of the main body is disposed on the support stand. A first caulking groove is disposed on a surface of the support stand, and a first sealing strip is disposed in the first caulking groove. The first sealing strip presses against a surface that is of the main body and that faces the isolation groove. The engaging lugs are connected to the edge of the main body and are connected to the circuit board through screws. The engaging lugs are connected to the circuit board through the screws. In this way, when the first sealing strip applies an elastic force to press against the main body, the engaging lugs can provide a reactive force for the main body, so that the main body steadily presses against the first sealing strip.

Optionally, a projection is formed on the inner wall of the housing, and the isolation groove is disposed in the projection. The projection is formed on the inner wall of the housing, and the isolation groove is disposed in the projection. In this way, the projection only occupies local space of the housing, and assembly space of an electrical component inside the housing is not affected. In addition, there is no need to increase thickness of a side wall of the housing, to well reduce manufacturing costs of the housing.

Optionally, the sealing plate includes the main body and the engaging lugs. The main body covers the second opening. The peripheral edge of the main body and a position that is on the projection and that is located at a peripheral edge of the second opening are hermetically connected. The engaging lugs are connected to the edge of the main body and are connected to the circuit board through the screws.

Optionally, the main body and the position that is of the projection and that is located at the peripheral edge of the second opening are hermetically connected through the waterproof glue.

Optionally, a second caulking groove is disposed at a position that is on the projection and that is at the peripheral edge of the second opening. A second sealing strip is disposed in the second caulking groove, and the second sealing strip presses against the surface that is of the main body and that faces the isolation groove.

Optionally, the interface component has a flexible printed circuit, where the flexible printed circuit extends out of the isolation groove through a gap between the main body and the circuit board and is connected to a board to board connector of the circuit board.

Optionally, a quantity of the engaging lugs is two, and two engaging lugs are respectively connected to edges of two opposite sides of the main body.

Optionally, the two engaging lugs are respectively located at two opposite ends of a diagonal line of the main body.

Optionally, the interface component is a universal serial bus interface.

To describe technical solutions in embodiments of this application more clearly, the following briefly describes accompanying drawings required in descriptions of the embodiments or conventional technology. Obviously, the accompanying drawings described in the following are merely some embodiments of this application. A person of ordinary skill in the art may also obtain other accompanying drawings based on these accompanying drawings without creative efforts.

The following describes in detail the embodiments of this application, and examples of the embodiments are shown in the accompanying drawings. Identical or similar reference numerals always represent identical or similar components or components containing identical or similar functions. For example, the following embodiments described with reference to <FIG> are intended to explain this application and are not construed as a limitation on this application.

In the description of this application, it should be understood that an orientation or a positional relationship indicated by terms such as "length", "width", "above", "under", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" is an orientation or a positional relationship shown based on the accompanying drawings. The orientation or the positional relationship is only intended to facilitate and simplify the description of this application, but is not intended to indicate or imply that an apparatus or a component needs to have a specific orientation and be constructed and operated in a specific orientation. Therefore, the terms cannot be construed as a limitation on this application.

In addition, the terms "first" and "second" are only used for description and should not be understood as an indication or implication of relative importance or as an implicit indication of a quantity of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise specified.

In this application, unless otherwise specified and defined, terms such as "mount", "connected", "connect", and "fix" should be broadly understood, for example, may be understood as a fixed connection, a detachable connection, or an integer, may be understood as a mechanical connection, or an electrical connection, or may be understood as a direct connection, an indirect connection implemented by using an intermediate medium, an internal connection between two components, or an interaction relationship between two components. A person of ordinary skill in the art may understand specific meanings of the foregoing terms in this application based on specific cases.

To facilitate understanding for a reader, the following explains proper nouns used in this application:
A dustproof and waterproof standard (IPXX, International Protection XX) indicates a capability of an interface of preventing liquid and fixed particulate matters. X indicates a number. A first number following the letters "IP" indicates the capability of preventing fixed particulate matters, and a second number following the letters "IP" indicates a capability of preventing liquid.

A small board refers to a circuit board that is configured to mount functional components such as a speaker, a microphone, a light module, an antenna, an interface, and an adapter in a terminal device, for example, a mobile phone, and is usually located at the bottom of the terminal device, for example, a mobile phone.

A flexible printed circuit (FPC, Flexible Printed Circuit) refers to a printed circuit board with high reliability and flexibility, and has features of high wiring density, light weight, thin thickness, and good bendability.

A universal serial bus (USB, Universal Serial Bus) interface is a bus standard-based interface used for connection and communication between a terminal device and an external device.

A Type-C interface is a type of USB interface, has a small volume, and is usually used in a terminal device, for example, a mobile phone.

A board to board connector (BTB, Board to Board Connector) is mainly configured to connect a flexible printed circuit to a main board or a small board.

With development of technologies and diversity of people's entertainment lives and working scenarios, people hope that a terminal, for example, a mobile phone can achieve a good waterproof effect, so that the terminal is not easily damaged when washed by or immersed in liquid. Therefore, terminals that appear in recent years usually have high waterproof and sealing levels (for example, an IPX7 level). However, a waterproof and sealing design that can reach at least the IPX7 level is usually implemented by improving waterproof and sealing performance of a component exposed to a housing of a housing. For example, waterproof and sealing processing is performed on an existing interface <NUM> (as shown in <FIG>), so that a terminal has good waterproof performance. Although this can improve the waterproof performance of the terminal, this also leads to high waterproof and sealing costs of the terminal, and is not conducive to controlling manufacturing costs of the terminal.

In addition, in the conventional technology, the existing interface <NUM> and each component in a terminal share an existing FPC board <NUM> (as shown in <FIG>). This makes it difficult to assemble the existing interface <NUM> in the terminal.

Therefore, an embodiment of this application provides a terminal device <NUM>, to implement a high waterproof and sealing level at low costs. In this embodiment, the high waterproof and sealing level specifically refers to at least an IPX7 level.

Specifically, as shown in <FIG>, the terminal device <NUM> provided in this embodiment of this application includes a housing <NUM>, a circuit board <NUM>, and an interface component <NUM>. In this embodiment, the terminal device <NUM> may be a mobile terminal device <NUM>, for example, a mobile phone, a tablet, or a notebook computer, or may be a fixed terminal device <NUM>, for example, a microcomputer, a workstation, a communication room data center, or a communication base station.

The housing <NUM> refers to an outer shell of the terminal device <NUM>, or may refer to an internal housing of the terminal device <NUM>. The circuit board <NUM> is disposed in the housing <NUM>. In this embodiment, the circuit board <NUM> may be a small board in the terminal device <NUM>. As shown in <FIG> and <FIG>, an isolation groove <NUM> is formed in an inner wall of the housing <NUM>, the isolation groove <NUM> has a first opening <NUM>, and the first opening <NUM> is exposed to the housing <NUM>. For example, the inner wall of the housing <NUM> may refer to a surface that is of a bezel <NUM> of the housing <NUM> and that faces inner space of the housing <NUM>, or may refer to a surface that is of a bottom surface or the like of the housing <NUM> and that faces the inner space of the housing <NUM> when the housing <NUM> is placed horizontally.

Specifically, the first opening <NUM> of the isolation groove <NUM> may be disposed to face the bezel <NUM> of the housing <NUM>. The interface component <NUM> is sealed in the isolation groove <NUM> through a sealing kit <NUM>. The interface component <NUM> is electrically connected to the circuit board <NUM>, and an interface end <NUM> of the interface component <NUM> is exposed to the first opening <NUM>. In this embodiment, the interface component <NUM> may be a USB interface, a Micro-USB interface, a Type-C interface, or the like.

With reference to <FIG> and <FIG>, the following further describes the terminal device <NUM> provided in this embodiment of this application. Since the isolation groove <NUM> is formed in the inner wall of the housing <NUM> of the terminal device <NUM> provided in this embodiment of this application, and the interface component <NUM> is sealed in the isolation groove <NUM>, in the housing, a separate assembly space independent of the circuit board <NUM> is formed in the isolation groove <NUM>. Moreover, since the interface component <NUM> is sealed in the isolation groove <NUM>, a good waterproof effect is implemented between the interface component <NUM> and the circuit board <NUM>. In this case, even if liquid infiltrates the interface component <NUM> from the interface end <NUM> exposed to the housing <NUM>, due to isolation of the sealing kit <NUM> in the isolation groove <NUM>, it is difficult for the liquid to overflow from the isolation groove <NUM> to the circuit board <NUM>, so that a good waterproof effect of the terminal device <NUM> is implemented, and a waterproof and sealing level of the terminal device <NUM> can reach at least an IPX7 level. However, a waterproof solution of the terminal device <NUM> is implemented by forming the isolation groove <NUM> in the inner wall of the housing <NUM>, and sealing the interface component <NUM> in the isolation groove <NUM>. Because waterproof performance of the interface component <NUM> is not required, the interface component <NUM> may be a non-waterproof component, so that waterproof and sealing costs of the terminal device <NUM> are well reduced, and the terminal device <NUM> implements a good waterproof and sealing effect at low costs.

For example, as shown in <FIG> and <FIG>, a frame <NUM> may be disposed on the inner wall of the housing <NUM>, an outer wall of the frame <NUM> is attached to the inner wall of the housing <NUM>, or the frame <NUM> is integrally formed with the housing <NUM>. The isolation groove <NUM> may be formed in the inner wall of the housing <NUM>, or may be formed in a wall surface of the frame <NUM>. The circuit board <NUM> is fixed in the frame <NUM>. A notch <NUM> (as shown in <FIG>) is correspondingly disposed at a position that is of the frame <NUM> and the housing <NUM> and that corresponds to the first opening <NUM> of the isolation groove <NUM>, and the interface end <NUM> of the interface component <NUM> is exposed to the notch <NUM>, to be connected to an external device. Certainly, the housing <NUM> may be the only one disposed on the terminal device <NUM>, and the isolation groove <NUM> is directly formed in the inner wall of the housing <NUM>.

For example, as shown in <FIG>, <FIG>, and <FIG>, the interface component <NUM> can be used together with an electrically connected plug <NUM> of the external device, and the electrically connected plug <NUM> may be plugged into the notch <NUM> and electrically contacted with the interface end <NUM> of the interface component <NUM>, to implement signal transmission between the interface component <NUM> and the external device.

In some other embodiments of this application, as shown in <FIG> and <FIG> to <FIG>, the isolation groove <NUM> has a second opening <NUM>, and the second opening <NUM> is located in the housing <NUM>. The sealing kit <NUM> includes a sealing plate <NUM>, and the sealing plate <NUM> is disposed at the second opening <NUM> and is configured to seal the second opening <NUM>. The sealing plate <NUM> may be sealed in the second opening <NUM>, or may cover a peripheral edge of the second opening <NUM>.

Specifically, in this embodiment, the sealing plate <NUM> is sealed in the second opening <NUM>, so that sealing of the interface component <NUM> in the isolation groove <NUM> is simply and reliably implemented, and reliable isolation between the interface component <NUM> and the circuit board <NUM> in the housing <NUM> of the terminal is also implemented.

In addition, the second opening <NUM> also facilitates an electrical connection between a flexible printed circuit <NUM> of the interface component <NUM> and the circuit board <NUM> in the housing <NUM> of the terminal. Electrically connected components such as the flexible printed circuit P60035/EP <NUM> of the interface component <NUM> may pass through the second opening <NUM> and the sealing plate <NUM>, to be electrically connected to the circuit board <NUM> in the housing <NUM> of the terminal.

In some other embodiments of this application, as shown in <FIG>, the sealing plate <NUM> includes a main body <NUM> and engaging lugs <NUM>. The main body <NUM> is disposed at the second opening <NUM>, and a gap <NUM> (as shown in <FIG>) is formed between a peripheral edge of the main body <NUM> and a groove wall of the isolation groove <NUM>. The gap <NUM> is filled with a waterproof glue <NUM> (as shown in <FIG>), and the engaging lugs <NUM> are connected to an edge of the main body <NUM> and are connected to the circuit board <NUM> through screws <NUM>.

Specifically, in this embodiment, as shown in <FIG>, the sealing plate <NUM> specifically includes the main body <NUM> and the engaging lugs <NUM>. In this embodiment, as shown in <FIG>, the main body <NUM> may be completely disposed in the isolation groove <NUM>, or may be semi-submerged in the isolation groove <NUM>. In this case, an end surface on which the second opening <NUM> is disposed on a small board has good flatness, so that the sealing plate <NUM> does not occupy assembly space inside the housing <NUM>, and this is conducive to a lightweight design of the terminal device <NUM>.

The gap <NUM> between the main body <NUM> and the groove wall of the isolation groove <NUM> is filled with the waterproof glue <NUM>, so that reliable sealing of the isolation groove <NUM> is implemented. The engaging lugs <NUM> are connected to the circuit board <NUM> through the screws <NUM>, so that a reliable connection between the sealing plate <NUM> and the circuit board <NUM> is implemented, and the sealing plate <NUM> has better assembly stability in the housing <NUM> of the terminal.

For example, the waterproof glue <NUM> may be filled in the gap <NUM> between the main body <NUM> and the groove wall of the isolation groove <NUM>.

For example, the engaging lugs <NUM> may be flake-like objects connected to the edge of the main body <NUM>, and the engaging lugs <NUM> may be integrally formed with the main body <NUM>, so that connection strength between the engaging lugs <NUM> and the main body <NUM> may be improved, and overall manufacturing costs of the sealing plate <NUM> can be reduced.

In some other embodiments of this application, as shown in <FIG>, a support stand <NUM> is disposed at a position that is on a groove wall of the isolation groove <NUM> and that is close to the second opening <NUM>, and the peripheral edge of the main body <NUM> is disposed on the support stand <NUM>. Specifically, the support stand <NUM> is disposed on the groove wall of the isolation groove <NUM>. In this case, when the main body <NUM> is disposed in the isolation groove <NUM>, the main body <NUM> can be stably limited in the isolation groove <NUM> through pressing of the support stand <NUM>. In this case, the main body <NUM> can be limited in the isolation groove <NUM> without pressing the main body <NUM> against the interface component <NUM>, thereby improving assembly stability of the main body <NUM> in the isolation groove <NUM>.

For example, as shown in <FIG>, the waterproof glue <NUM> may also be filled between the main body <NUM> and the support stand <NUM>, so that the main body <NUM> and the support stand <NUM> have better connection strength, and sealing performance of the sealing plate <NUM> to the isolation groove <NUM> is also improved.

For example, as shown in <FIG>, the support stand <NUM> may be suspended on the groove wall of the isolation groove <NUM>, so that the support stand <NUM> may not occupy assembly space inside the isolation groove <NUM>, thereby leaving enough space for mounting the interface component <NUM> in the isolation groove <NUM>.

Optionally, the support stand <NUM> may alternatively be formed by forming a step at a position that is on the groove wall of the isolation groove <NUM> and that is close to the second opening <NUM>. In this case, when the support stand <NUM> presses against the main body <NUM>, stability of supporting the main body <NUM> can be well improved.

In some other embodiments of this application, as shown in <FIG>, the sealing plate <NUM> includes the main body <NUM> and the engaging lugs <NUM>. The main body <NUM> is disposed at the second opening <NUM>. The support stand <NUM> is disposed at the position that is on the groove wall of the isolation groove <NUM> and that is close to the second opening <NUM>, and the peripheral edge of the main body <NUM> is disposed on the support stand <NUM>. A first caulking groove <NUM> (as shown in <FIG>) is disposed on a surface of the support stand <NUM>, and a first sealing strip <NUM> (as shown in <FIG>) is disposed in the first caulking groove <NUM>. The first sealing strip <NUM> presses against a surface that is of the main body <NUM> and that faces the isolation groove <NUM>. The engaging lugs <NUM> are connected to the edge of the main body <NUM> and are connected to the circuit board <NUM> through the screws <NUM>.

Specifically, in this embodiment, the main body <NUM> and the isolation groove <NUM> may be sealed without the waterproof glue <NUM>, but the first sealing strip <NUM> may be disposed in the first caulking groove <NUM> disposed on the surface of the support stand <NUM>, so that the first sealing strip <NUM> presses against the main body <NUM>. In this case, because the engaging lugs <NUM> are connected to the circuit board <NUM> through the screws <NUM>, when the first sealing strip <NUM> applies an elastic force to press against the main body <NUM>, the engaging lugs <NUM> can provide a reactive force for the main body <NUM>, so that the main body <NUM> steadily presses against the first sealing strip <NUM>, thereby implementing sealing of the isolation groove <NUM> by the main body <NUM>. Therefore, the sealing plate <NUM> can be detachably connected to the circuit board <NUM>, to facilitate removal and replacement of the sealing plate <NUM>, and avoid use of the waterproof glue <NUM>. Therefore, the terminal device <NUM> has lower waterproof implementation costs.

In some other embodiments of this application, as shown in <FIG> and <FIG>, a projection <NUM> is formed on the inner wall of the housing <NUM>, and the isolation groove <NUM> is disposed on the projection <NUM>. Specifically, in other embodiments of this application, the isolation groove <NUM> may be directly disposed on the inner wall of the housing <NUM>. In this case, the housing <NUM> needs to be sufficiently thick. However, if the thickness of the housing <NUM> is too thick, it is not conducive to control manufacturing costs of the housing, and the housing <NUM> occupies assembly space of an electronic component in the housing <NUM>.

However, in this embodiment, the projection <NUM> is formed on the inner wall of the housing <NUM>, and then the isolation groove <NUM> is disposed in the projection <NUM>. In this way, the projection <NUM> only occupies local space of the housing <NUM>, and assembly space of the electrical component inside the housing <NUM> is not affected. In addition, there is no need to increase thickness of a side wall of the housing <NUM>, to well reduce manufacturing costs of the housing <NUM>. For example, the projection <NUM> and the housing <NUM> may be die-cast integrally, forged integrally, or injection molded integrally, so that strength of a junction between the projection <NUM> and the housing <NUM> can be improved, and manufacturing costs of the projection <NUM> and the housing <NUM> are reduced. For example, as shown in <FIG>, a clearance configured to pass through the projection <NUM> is disposed on a circuit board <NUM>.

In some other embodiments of this application, as shown in <FIG> and <FIG>, the sealing plate <NUM> includes the main body <NUM> and the engaging lugs <NUM>. The main body <NUM> covers the second opening <NUM>. The peripheral edge of the main body <NUM> and a position that is on the projection <NUM> and that is located at the peripheral edge of the second opening <NUM> are hermetically connected. The engaging lugs <NUM> are connected to the edge of the main body <NUM> and are connected to the circuit board <NUM> through the screws <NUM>.

Specifically, in this embodiment, the main body <NUM> covers the second opening <NUM>. To be specific, the main body <NUM> completely covers the second opening <NUM>, instead of being disposed in the second opening <NUM>. In addition, the peripheral edge of the main body <NUM> and the position that is on the projection <NUM> and that is located at the peripheral edge of the second opening <NUM> are hermetically connected, thereby implementing sealing of the isolation groove <NUM> by the main body <NUM>. The main body <NUM> does not need to be disposed in the isolation groove <NUM>, so that a strict requirement for dimensional tolerance of the main body <NUM> may be avoided, processing difficulty of the main body <NUM> is reduced, and processing and manufacturing costs of the main body <NUM> are reduced.

In some other embodiments of this application, as shown in <FIG>, the main body <NUM> and the position that is of the projection <NUM> and that is located at the peripheral edge of the second opening <NUM> are hermetically connected through the waterproof glue <NUM>. Specifically, a peripheral edge of the main body <NUM> and a circuit board <NUM> and the peripheral edge of the second opening <NUM> are sealed through a glue dispensing operation of the waterproof glue <NUM>. The waterproof glue <NUM> may be simply distributed in a position that is of the projection <NUM> and that is located at the peripheral edge of the second opening <NUM>.

In some other embodiments of this application, as shown in <FIG> and <FIG>, a second caulking groove <NUM> is disposed at a position that is on the projection <NUM> and that is at the peripheral edge of the second opening <NUM>. A second sealing strip <NUM> is disposed in the second caulking groove <NUM>, and the second sealing strip <NUM> presses against the surface that is of the main body <NUM> and that faces the isolation groove <NUM>.

Specifically, in this embodiment, the main body <NUM> of the sealing plate <NUM> may be hermetically connected to the projection 12through pressing of the second sealing strip <NUM>. Therefore, the sealing plate <NUM> can be detachably connected to the projection <NUM>, to facilitate removal and replacement of the sealing plate <NUM>, and avoid use of the waterproof glue <NUM>, so that the terminal device <NUM> has lower waterproof implementation costs.

In some other embodiments of this application, as shown in <FIG>, a quantity of engaging lugs <NUM> is two, and two engaging lugs <NUM> are respectively connected to edges of two opposite sides of the main body <NUM>. Specifically, in this embodiment, the quantity of the engaging lugs <NUM> is limited to two, and the two engaging lugs <NUM> are respectively connected to the edges of the two opposite sides of the main body <NUM>, so that the two engaging lugs <NUM> can exert forces on the two opposite sides of the main body <NUM>, and the main body <NUM> can be stably disposed in the housing <NUM> of the terminal.

In some other embodiments of this application, as shown in <FIG>, the two engaging lugs <NUM> are respectively located at two opposite ends of a diagonal line of the main body <NUM>. Specifically, on the basis of the foregoing embodiment, the two engaging lugs <NUM> are respectively located at the two opposite ends of the diagonal line of the main body <NUM>. Therefore, the two engaging lugs <NUM> are respectively located on two opposite sides in a width direction of the main body <NUM>, and the two engaging lugs <NUM> are also respectively located on two opposite sides in a length direction of the main body <NUM>, so that the two engaging lugs <NUM> can exert forces on the two opposite sides in the length direction and the two opposite sides in the width direction of the main body <NUM>, and the main body <NUM> can be more stably disposed in the housing <NUM> of the terminal.

In the primary embodiment of this application, as shown in <FIG> and <FIG>, the sealing kit <NUM> includes a sealing glue <NUM>, and the sealing glue <NUM> is filled in the isolation groove <NUM>. The interface component <NUM> is sealed in the sealing glue <NUM>. Specifically, in this embodiment, the sealing kit <NUM> is the sealing glue <NUM>, and the sealing glue <NUM> is directly filled in the isolation groove <NUM>, so that the interface component <NUM> is sealed in the isolation groove <NUM>. In this way, sealing costs of the interface component <NUM> are better reduced, and overall waterproof implementation costs of the terminal device <NUM> are better reduced.

The flexible printed circuit <NUM> of the interface component <NUM> in this embodiment of this application is directly connected to a BTB interface on the circuit board <NUM>, so the flexible printed circuit <NUM> is separately configured for the interface component <NUM>, thus facilitating rapid assembly of the interface component <NUM> in the housing <NUM>.

Claim 1:
A terminal device, comprising:
a housing (<NUM>), wherein an isolation groove (<NUM>) is formed in an inner wall of the housing (<NUM>), the isolation groove (<NUM>) has a first opening (<NUM>), and the first opening (<NUM>) is exposed to the housing (<NUM>);
a circuit board (<NUM>), wherein the circuit board (<NUM>) is disposed in the housing (<NUM>); and
an interface component (<NUM>), wherein the interface component (<NUM>) is sealed in the isolation groove (<NUM>) through a sealing kit (<NUM>), the interface component (<NUM>) is electrically connected to the circuit board (<NUM>), and an interface end (<NUM>) of the interface component (<NUM>) is exposed to the first opening (<NUM>);
wherein the isolation groove (<NUM>) has a second opening (<NUM>), the second opening (<NUM>) is located inside the housing (<NUM>), the sealing kit (<NUM>) comprises a sealing plate (<NUM>), and the sealing plate (<NUM>) is disposed at the second opening (<NUM>) and is configured to seal the second opening (<NUM>), and
wherein the sealing kit (<NUM>) further comprises a sealing glue (<NUM>), the sealing glue (<NUM>) is filled in the isolation groove (<NUM>), and the interface component (<NUM>) is sealed in the sealing glue (<NUM>).