Patent Description:
This disclosure generally relates to the field of electronic product technologies, and the invention in particular relates to an electronic device.

In electronic devices such as mobile phones, a sidewall of a middle frame is provided with a mounting cavity for mounting an antenna board. The mounting cavity is located outside a battery compartment. As the electronic devices are provided with increasing functions and larger screens, the electronic devices consume power faster. To ensure a battery life for the electronic devices, a larger battery is preferred. Correspondingly, a larger space is also preferred for the battery compartment. Therefore, when the electronic devices have a same volume, the middle frame is located in a limited space outside the battery compartment, and a space of the mounting cavity is limited. As a result, when the antenna board is mounted in the mounting cavity, an operation space is limited.

In a conventional technology, the antenna board is fastened in the mounting cavity by using screws, the space of the mounting cavity is small, fastening by screws is inconvenient, and the middle frame and even the battery compartment are easily damaged during a mounting process.

<CIT> relates to the technical field of communication and particularly relates to an antenna bracket. The antenna bracket comprises a bracket body and a clamping part arranged on the bracket body and extending along the lower part of the bracket body, wherein the clamping part is clamped with a middle frame structure. The disclosure also discloses a middle frame structure. The middle frame structure comprises a middle frame body, wherein a cavity for containing the antenna bracket is formed in the middle frame body; a clamping groove clamped with the clamping part is formed in the bottom of the cavity; through cooperation of the clamping part and the clamping groove, the antenna bracket is fixed or separated from the middle frame structure. Through the antenna bracket and the middle frame structure, the efficiency of assembling and disassembling the antenna bracket and the middle frame structure is improved.

The object of the present application is to provide an electronic device, to resolve a problem of operation inconvenience in antenna board mounting when a mounting space for mounting an antenna board is small, and a problem that a peripheral component is easily damaged in a mounting process. This object is solved by the attached independent claims and further embodiments and improvements of the invention are listed in the attached dependent claims. Hereinafter, up to the "brief description of the drawings", expressions like ". aspect according to the invention", "according to the invention", or "the present invention", relate to technical teaching of the broadest embodiment as claimed with the independent claims. Expressions like "implementation", "design", "optionally", "preferably", "scenario", "aspect" or similar relate to further embodiments as claimed, and expressions like "example", ". aspect according to an example", "the disclosure describes", or "the disclosure" describe technical teaching which relates to the understanding of the invention or its embodiments, which, however, is not claimed as such.

In one aspect according to the invention, the invention provides an electronic device, including a middle frame, an antenna board, and a fastener. The middle frame is provided with a mounting cavity, and an inner wall of the mounting cavity is provided with a limiting portion. The antenna board is placed in the mounting cavity, and the fastener is capable of being clamped between the limiting portion and an upper end face of the antenna board, to restrict the antenna board from moving upward along a depth direction of the mounting cavity.

The antenna board mounted in the mounting cavity can be fastened by using the fastener and the limiting portion. The limiting portion is integrally formed on the inner wall of the mounting cavity. During specific mounting, after the antenna board is mounted in the mounting cavity, it is only required to insert the fastener between the limiting portion and the antenna board, without using a large complex operation tool (such as a screwdriver). The mounting operation can be simplified, and no damage is caused to the inner wall of the mounting cavity and even an adjacent battery compartment.

According to the aspect, an embodiment of this invention further provides a first implementation of the aspect:
the mounting cavity is inwardly provided with a limiting protrusion on each of two sidewalls along a width direction, a spacing between the limiting protrusions disposed on the two sidewalls is less than a width of the fastener, and the limiting protrusions form the limiting portion. The two limiting protrusions are used to limit the antenna board from two sides along the width direction. This can ensure stability, so that a more balanced acting force is applied to the fastener and the limiting is more stable.

According to the aspect, an embodiment of this invention further provides a second implementation of the aspect:
the limiting portion is a limiting groove disposed on the inner wall of the mounting cavity, and the fastener is capable of being inserted into the limiting groove and abutting against the upper end face of the antenna board. The limiting groove is used to limit the fastener, and the limiting groove does not occupy a space in the mounting cavity, to facilitate the mounting operation of the antenna board.

According to the aspect or the first or second implementation of the aspect, an embodiment of this invention further provides a third implementation of the aspect:
a slot is further disposed on an inner wall at one end of the mounting cavity along a length direction of the mounting cavity, a first end of the antenna board along a length direction of the antenna board is capable of being inserted into the slot, and an upper sidewall of the slot is capable of restricting the antenna board from moving upward. When the fastener and the slot are used to limit the antenna board, only one fastener needs to be disposed to ensure mounting stability of the antenna board and to further simplify an overall structure while simplifying the mounting operation.

According to the third implementation of the aspect, a further embodiment of this invention further provides a fourth implementation of the aspect:
the mounting cavity includes an upper cavity body and a middle cavity body from top to bottom; and the middle cavity body is provided with the slot, and the upper cavity body outwardly extends away from one end of the slot and forms an avoidance space. Disposing the avoidance space facilitates the mounting operation of the antenna board.

According to the fourth implementation of the aspect, another embodiment of this invention further provides a fifth implementation of the aspect:
a bottom of the middle cavity body is further provided with an accommodating groove, a lower end face of the antenna board is further provided with a metal elastomer for connecting to the middle frame, and when the antenna board is mounted in the middle cavity body, the metal elastomer is located in the accommodating groove. In a mounting state, the fastener and the metal elastomer can respectively act on the antenna board from the end faces on upper and lower sides, so that a location of the antenna board is stable. In addition, as the metal elastomer can provide an elastic acting force to the antenna board, a case of crushing the antenna board is avoided while stability is ensured, and further precision requirements on the limiting portion and the fastener can be reduced.

According to any one of the aspect and the first to the fifth implementations of the aspect, a still further embodiment of this invention further provides a sixth implementation of the aspect:
the fastener is provided with a first limiting structure, the antenna board is provided with a second limiting structure, and when the fastener abuts against the upper end face of the antenna board, the first limiting structure and the second limiting structure are capable of cooperating with each other to restrict the fastener from moving and being detached from the limiting portion. With this arrangement, after the mounting is completed, a case that is caused by shaking of the electronic device and the like and in which the fastener slides relative to the limiting portion along the length direction of the mounting cavity and is detached from the limiting portion can be avoided in a use process. This can ensure that the fastener can be stably clamped between the limiting portion and the upper end face of the antenna board, and further ensure that the fastener has a stable effect on the antenna board.

According to the sixth implementation of the aspect, another still further embodiment of this invention further provides a seventh implementation of the aspect:
the first limiting structure is a first convex portion upwardly protruding from the fastener, the second limiting structure is a second convex portion upwardly protruding from the upper end face of the antenna board, and the first convex portion is located between the second convex portion and the limiting portion. With this arrangement, the first convex portion can be restricted from moving to both sides along the length direction, thereby ensuring limiting stability.

According to the seventh implementation of the aspect, a still other embodiment of this invention further provides an eighth implementation of the aspect:
the fastener includes a fastening plate, and the fastening plate partially arches upward and forms the first convex portion. When the first convex portion is formed by the partial arching, the overall structure can be simplified and an overall weight can be reduced.

According to the eighth implementation of the aspect, another embodiment of this invention further provides a ninth implementation of the aspect:
an end of the first convex portion is further provided with a stopper for abutting against the second convex portion, a bottom of the stopper is capable of abutting against the upper end face of the antenna board, and a limiting block is further disposed on a side that is of an upper portion of the stopper and that faces the second convex portion. This avoids a limiting failure caused by entry of the second convex portion into a gap in a case that the second convex portion abuts against the stopper. In addition, when the second convex portion abuts against the stopper, the limiting block can limit an abutment location of the second convex portion from above, so as to limit the second convex portion to between the upper end face of the antenna board and the limiting block, thereby ensuring a stable limiting effect.

According to any one of the seventh to ninth implementations of the aspect, another embodiment of this invention further provides a tenth implementation of the aspect:
the upper end face of the antenna board is fixedly provided with a baffle plate, and the baffle plate is upwardly bent towards one end of the first convex portion and forms the second convex portion. With this arrangement, a case in which the second convex portion enters a gap between a lower end of the stopper and the upper end face of the antenna board can be avoided. In addition, when the second convex portion is formed by bending the baffle plate, the overall structure and a molding process can be further simplified.

According to the sixth implementation of the aspect, an embodiment of this invention further provides an eleventh implementation of the aspect:
one of the first limiting structure and the second limiting structure is a positioning hole and the other is a positioning protrusion, and when the fastener is clamped between the limiting portion and the upper end face of the antenna board, the positioning protrusion is capable of being inserted into the positioning hole. When the positioning hole cooperates with the positioning protrusion to implement positioning, the overall structure can be simplified while a stable limiting effect can be ensured.

According to any one of the aspect and the first to the eleventh implementations of the aspect, another embodiment of this invention further provides a twelfth implementation of the aspect:
the fastener is further provided with an operation portion to facilitate the mounting operation.

According to the twelfth implementation of the aspect, a still further embodiment of this invention further provides a thirteenth implementation of the aspect:
the operation portion is capable of being detached from the fastener. No external auxiliary tool is required during mounting, the mounting is convenient, and impact of the operation portion on subsequent mounting or a peripheral structure can be avoided.

According to the twelfth implementation of the aspect, another embodiment of this invention further provides a fourteenth implementation of the aspect:
the operation portion is formed by bending an end of the fastener, and the operation portion is located in the mounting cavity. This can facilitate the mounting operation, and can avoid impact of the operation portion on subsequent mounting or a peripheral structure.

To describe technical solutions in embodiments of the present invention or in a conventional technology more clearly, the following briefly describes accompanying drawings required for describing the embodiments or the conventional technology. Apparently, the accompanying drawings in the following description show some embodiments of the present invention, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.

Description of reference numerals in <FIG>:.

Embodiments of the present invention provide an electronic device. The electronic device may be a terminal product, such as a mobile phone, a tablet computer, a wearable device, an in-vehicle device, an augmented reality (augmented reality, AR)/virtual reality (virtual reality, VR) device, a notebook computer, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook, or a personal digital assistant (personal digital assistant, PDA). A specific type of the electronic device is not limited in the embodiments of this application.

The electronic device includes a screen, a rear cover, and a middle frame. The middle frame is located between the screen and the rear cover. As shown in <FIG>, a middle frame <NUM> of the electronic device includes a middle plate <NUM> and a bezel <NUM>. The bezel <NUM> circumferentially surrounds an outer edge of the middle plate <NUM>. A battery compartment <NUM> is provided between the middle plate <NUM> and the rear cover. The battery compartment <NUM> is configured to house a battery for supplying power to the electronic device. The bezel <NUM> is provided with a mounting cavity <NUM>. A depth direction of the mounting cavity <NUM> is arranged along a thickness direction of the electronic device. The mounting cavity <NUM> is provided on an end face on a rear side of the middle frame <NUM> ("rear side" specifically refers to a side facing the rear cover). The mounting cavity <NUM> is located outside the battery compartment <NUM> and is configured to mount an antenna board <NUM> of the electronic device.

As electronic devices are provided with increasing functions and larger screens, the electronic devices consume power faster. To ensure a battery life for the electronic devices, a larger battery is preferred. Correspondingly, a larger space is also preferred for the battery compartment <NUM>. Therefore, when the electronic devices have a same volume, the middle frame <NUM> is located in a limited space outside the battery compartment <NUM>, that is, the bezel <NUM> has a limited width, and an arrangement space of the mounting cavity <NUM> is limited. As a result, when the antenna board <NUM> is mounted in the mounting cavity <NUM>, an operation space is limited, and a mounting operation is inconvenient. Therefore, in the embodiments of this application, the antenna board <NUM> is fastened in the mounting cavity <NUM> by using a fastener <NUM>. This can ensure mounting stability of the antenna board <NUM> while simplifying the mounting operation, and can further avoid damage to the middle frame <NUM> and the battery compartment <NUM> in a mounting process.

In the embodiments of this application, as shown in <FIG>, "upper" refers to a side facing an opening along the depth direction of the mounting cavity <NUM>, and correspondingly "lower" refers to a side facing the inside of the mounting cavity <NUM> along the depth direction of the mounting cavity <NUM>.

As shown in <FIG> and <FIG>, inner walls of the mounting cavity <NUM> each are provided with a limiting protrusion <NUM>. Two opposite sidewalls of the mounting cavity <NUM> along a width direction inwardly protrude to form the limiting protrusions <NUM>, respectively. A spacing between the limiting protrusions <NUM> provided on the two sidewalls is less than a width of the fastener <NUM> and greater than a width of the antenna board <NUM> that corresponds to a location here. The fastener <NUM> can be clamped between an upper end face of the antenna board <NUM> and the limiting protrusions <NUM>. In this case, the limiting protrusions <NUM> are located above the fastener <NUM> and restrict the fastener <NUM> from moving upward, and the limiting protrusions <NUM> form a limiting portion for restricting the fastener <NUM> from moving upward.

During mounting, the antenna board <NUM> can directly pass through a gap between the two limiting protrusions <NUM> and enter a mounting groove. Then, the fastener <NUM> is inserted against the upper end face of the antenna board <NUM> between the upper end face of the antenna board <NUM> and the limiting protrusions <NUM>. The operations are convenient. The limiting protrusions <NUM> are used to limit the antenna board <NUM> from two sides along the width direction. This can ensure stability, so that a more balanced acting force is applied to the fastener <NUM> and the limiting is more stable.

Specific locations for disposing the limiting protrusions <NUM> are not limited. As shown in <FIG>, the limiting protrusions <NUM> are located at one end of the mounting cavity <NUM>, or the limiting protrusions <NUM> may be disposed at middle locations in a length direction of the mounting cavity <NUM>. This is not specifically limited.

Surfaces of the limiting protrusions <NUM> present smooth structures, to avoid damage to the antenna board <NUM> caused by scraping the antenna board <NUM> during mounting. Further, an end of the fastener <NUM> is further provided with a guiding surface <NUM>. When the fastener <NUM> is mounted, the fastener <NUM> is inserted between the upper end face of the antenna board <NUM> and the limiting protrusions <NUM>. The guiding surface <NUM> can avoid abrasion during insertion. The guiding surface <NUM> may be either an arc surface or an inclined surface.

Certainly, in some embodiments, a limiting groove (not shown in the figure) may be further provided on an inner wall of the mounting cavity, to form the limiting portion for restricting the fastener <NUM> from moving upward. After the antenna board <NUM> is mounted in the mounting cavity <NUM>, the fastener <NUM> is inserted into the limiting groove. In this case, the fastener <NUM> can abut against the upper end face of the antenna board <NUM>, and an upper groove wall of the limiting groove can restrict the fastener <NUM> from moving upward, thereby ensuring location stability of the antenna board <NUM>. Specifically, the limiting groove may be disposed on each of the two sidewalls of the mounting cavity <NUM> along the width direction, or may be disposed on an inner wall at one end of the mounting cavity <NUM>. The limiting groove is used to limit the fastener <NUM>, and the limiting groove does not occupy a space in the mounting cavity <NUM>, to facilitate the mounting operation of the antenna board <NUM>.

As shown in <FIG> and <FIG>, a slot <NUM> is further disposed on an inner wall of the mounting cavity <NUM>. The slot <NUM> is disposed at one end of the mounting cavity <NUM>. The antenna board <NUM> is a strip-shaped structure. Two ends of the antenna board <NUM> along its length direction are respectively a first end <NUM> and a second end <NUM>. During mounting, the first end <NUM> can be inserted into the slot <NUM>, and an upper sidewall of the slot <NUM> can limit the first end <NUM>, to prevent the first end <NUM> from moving upward along the depth direction of the mounting cavity <NUM>. The fastener <NUM> can be clamped between the upper end face of the antenna board <NUM> and the limiting protrusions <NUM>. In this case, the limiting protrusions <NUM> are located above the fastener <NUM> and restrict the fastener <NUM> from moving upward, and the fastener <NUM> restricts the antenna board <NUM> from moving upward. The antenna board <NUM> is limited by using both the slot <NUM> and the fastener <NUM>, to prevent the antenna board <NUM> from moving upward, and further ensure that the antenna board <NUM> is stably located in the mounting cavity <NUM>.

As shown in <FIG>, a lower end face of the antenna board <NUM> is further provided with a metal elastomer <NUM>. The metal elastomer <NUM> can be clamped between the antenna board <NUM> and the middle frame <NUM> and is configured to implement electrical connection. A bottom of the mounting cavity <NUM> is further provided with an accommodating groove <NUM>. After the antenna board <NUM> is mounted in the mounting cavity <NUM>, the metal elastomer <NUM> can be located in the accommodating groove <NUM>, the limiting protrusions <NUM> can be pressed against the antenna board <NUM> from above, the antenna board <NUM> downwardly compresses the metal elastomer <NUM>, and the metal elastomer <NUM> in a compressed state can provide the antenna board <NUM> with an upward elastic support force. In other words, in a mounting state, the fastener <NUM> and the metal elastomer <NUM> can respectively act on the antenna board <NUM> from the end faces on upper and lower sides, so that a location of the antenna board <NUM> is stable. In addition, as the metal elastomer <NUM> can provide an elastic acting force to the antenna board <NUM>, a case of crushing the antenna board <NUM> is avoided while stability is ensured, and further precision requirements on the limiting protrusions <NUM> and the fastener <NUM> can be reduced.

The antenna board <NUM> mounted in the mounting cavity <NUM> can be fastened by using the fastener <NUM> and the limiting protrusions <NUM>. The limiting protrusions <NUM> are fixedly provided on the inner walls of the mounting cavity <NUM>. The limiting protrusions <NUM> and the mounting cavity <NUM> are integrally formed, or may be fastened by soldering or in another manner before factory delivery. During specific mounting, after the antenna board <NUM> is mounted in the mounting cavity <NUM>, it is only required to insert the fastener <NUM> between the antenna board <NUM> and the mounting cavity <NUM>, without using a large complex operation tool (such as a screwdriver). The mounting operation can be simplified, and no damage is caused to the inner walls of the mounting cavity <NUM> and even the adjacent battery compartment <NUM>. A quantity of the fasteners <NUM> is not limited. Specifically, the antenna board <NUM> may be limited by using two fasteners <NUM>, or the antenna board <NUM> may be limited by using one fastener <NUM>. Specifically, the quantity of the fasteners <NUM> may be set based on a length of the antenna board, a length of each fastener, and the like.

In the embodiments of this application, alternatively, no slot <NUM> may be disposed in the mounting cavity <NUM>, and the antenna board <NUM> may be fastened only by using the fastener <NUM> and the limiting portion (the limiting protrusions <NUM> or the limiting groove). When the fastener <NUM> and the slot <NUM> are used to limit the antenna board <NUM>, only one fastener <NUM> needs to be disposed to ensure mounting stability of the antenna board <NUM> and to further simplify an overall structure while simplifying the mounting operation.

The mounting cavity <NUM> is inwardly provided with the limiting protrusions <NUM> respectively on the two opposite sidewalls along the width direction, the spacing between the two limiting protrusions <NUM> is less than the width of the fastener <NUM> and greater than the width of the antenna board <NUM> that corresponds to a location here, thereby forming the limiting portion above. During mounting, the antenna board <NUM> can directly pass through the gap between the two limiting protrusions <NUM> and enter the mounting groove. Then, the fastener <NUM> is inserted against the upper end face of the antenna board <NUM> between the upper end face of the antenna board <NUM> and the limiting protrusions <NUM>. The operations are convenient. The limiting protrusions <NUM> are used to limit the antenna board <NUM> from the two sides along the width direction. This can ensure stability, so that a more balanced acting force is applied to the fastener <NUM> and the limiting is more stable.

As shown in <FIG>, the space in the mounting cavity <NUM> sequentially includes an upper cavity body <NUM> and a middle cavity body <NUM> from outside in. A length of the middle cavity body <NUM> adapts to the length of the antenna board <NUM>. The middle cavity body <NUM> is provided with the foregoing slot <NUM> at one end along its own length direction. The upper cavity body <NUM> is provided with the limiting protrusions <NUM>. The middle cavity body <NUM> is configured to accommodate the antenna board <NUM>. The upper cavity body <NUM> is located above the middle cavity body <NUM>. In addition, the upper cavity body <NUM> outwardly extends relative to the middle cavity body <NUM> by one segment at one end away from the slot <NUM>. This extending portion forms an avoidance space. A bottom of the middle cavity body <NUM> is provided with the accommodating groove <NUM>.

To ensure location stability for the antenna board <NUM> after the antenna board <NUM> is mounted in the middle cavity body <NUM>, the length of the middle cavity body <NUM> is not much greater than the length of the antenna board <NUM>. Therefore, to ensure that the antenna board <NUM> can be smoothly mounted in the middle cavity body <NUM> and fit into the slot <NUM>, the antenna board <NUM> inclinedly enters the mounting cavity <NUM> during mounting. Specifically, the first end <NUM> downwardly enters the middle cavity body <NUM> of the mounting cavity <NUM> and reaches an opening location of the slot <NUM>. In this case, the second end <NUM> is inclined upward and located in the avoidance space of the upper cavity body <NUM>, and then the antenna board <NUM> is pushed, so that the first end <NUM> is inserted into the slot <NUM>. At this time, the antenna board <NUM> is still inclined and the second end <NUM> is located in the upper cavity body <NUM>. Afterwards, the second end <NUM> is pushed downward, so that the second end <NUM> fully enters the middle cavity body <NUM>. The metal elastomer <NUM> on the lower end face of the antenna board <NUM> can just fall into the accommodating groove <NUM>. Subsequently, the fastener <NUM> is mounted. Disposing the avoidance space <NUM> facilitates the mounting operation of the antenna board <NUM>.

As shown in <FIG>, a first convex portion <NUM> upwardly protrudes from the fastener <NUM>, the first convex portion <NUM> forms a first limiting structure, a second convex portion <NUM> upwardly protrudes from the upper end face of the antenna board <NUM>, and the second convex portion <NUM> forms a second limiting structure. In the mounting state, the first convex portion <NUM> is located between the second convex portion <NUM> and the limiting protrusions <NUM>. In other words, the second convex portion <NUM> and the limiting protrusions <NUM> can tightly clamp the first convex portion <NUM> respectively from both sides along the length direction. Such arrangement can restrict the first convex portion <NUM> from moving towards both sides along the length direction. A case that is caused by shaking of the electronic device and the like and in which the fastener <NUM> slides relative to the limiting protrusions <NUM> along the length direction of the mounting cavity <NUM> and is detached from the limiting portion can be avoided in a use process. This can ensure that the fastener <NUM> can be stably clamped between the limiting portion and the upper end face of the antenna board <NUM>, and further ensure that the fastener <NUM> has a stable effect on the antenna board <NUM>.

In other words, the first limiting structure is provided on the fastener <NUM>, and the second limiting structure is provided on the antenna board <NUM>. In the mounting state, the two limiting structures cooperate with each other for limiting, to restrict the fastener <NUM> from moving along the length direction of the mounting cavity <NUM>, thereby ensuring stability of the fastener <NUM>.

Further, as shown in <FIG>, the fastener <NUM> includes a fastening plate <NUM>. The fastening plate <NUM> partially arches upward, and an arched portion forms the first convex portion <NUM> protruding upward. Certainly, the first convex portion <NUM> may be formed by partially bending the fastening plate <NUM> or formed by machining. Alternatively, the fastening plate <NUM> may be provided as a flat plate structure, and a convex structure may be fastened on an upper end face at one end of the fastening plate <NUM> that faces the first convex portion <NUM>, to form the first convex portion <NUM>. When the first convex portion <NUM> is formed by the partial arching, the overall structure can be simplified and an overall weight can be reduced.

In the embodiments of this application, the fastener <NUM> is a plastic member. The fastener <NUM> may be integrally injection-molded, may be provided as a metal member, or the like. The integrally injection-molded plastic member can simplify the overall structure and a processing process.

As shown in <FIG> and <FIG>, an end of the first convex portion <NUM> is further provided with a stopper <NUM>. The stopper <NUM> is configured to abut against the second convex portion <NUM>. In the mounting state, a lower end of the stopper <NUM> can abut against the upper end face of the antenna board <NUM>, to avoid a case that a gap exists between the lower end of the stopper <NUM> and the upper end face of the antenna board <NUM> and limiting cannot be implemented due to entry of the second convex portion <NUM> into the gap when the second convex portion <NUM> abuts against the stopper <NUM>. In addition, an upper end of the stopper <NUM> is further provided with a limiting block <NUM>. The limiting block <NUM> is disposed on a side that faces the second convex portion <NUM>. When the second convex portion <NUM> abuts against the stopper <NUM>, the limiting block <NUM> can limit an abutment location of the second convex portion <NUM> from above, so as to limit the second convex portion <NUM> to between the upper end face of the antenna board <NUM> and the limiting block <NUM>, thereby ensuring a stable limiting effect.

As shown in <FIG> and <FIG>, the fastener <NUM> is further provided with an operation portion <NUM>. The operation portion <NUM> is fastened to the fastener <NUM>, and the operation portion <NUM> has a long length. During mounting, the operation portion <NUM> is operated to place the fastener <NUM> into the mounting cavity <NUM>, and the operation portion <NUM> is pushed, so that the fastener <NUM> is inserted between the upper end face of the antenna board <NUM> and the limiting protrusions <NUM>. The operations are convenient. The operation portion <NUM> extends out of the mounting cavity <NUM> due to its long length. In this way, a sufficient space for manual operations is provided. Specifically, the operation portion <NUM> is detachable from the fastener <NUM>. Therefore, after the mounting is completed, the operation portion <NUM> may be detached from the fastener <NUM> and then removed, to avoid impact of the operation portion <NUM> on subsequent mounting.

Specifically, a manner of connection between the fastener <NUM> and the operation portion <NUM> is not limited in the embodiments of this application. For example, the fastener <NUM> may be detachably connected to the operation portion <NUM> by using threads or the like, or the fastener <NUM> and the operation portion <NUM> may be provided as an integral structure, while connection strength at a connection joint between the fastener <NUM> and the operation portion <NUM> is reduced (for example, a cross-sectional area of the connection joint is reduced). After mounting of the fastener <NUM> is completed, the connection between the operation portion <NUM> and the fastener <NUM> may be broken directly in a manner such as rotating or bending the operation portion <NUM> relative to the fastener <NUM>, and then the operation portion <NUM> can be removed. The operations are convenient.

As a mounting space is small and a volume of the fastener <NUM> is also small, operations are inconvenient if a mounting person holds the fastener <NUM> and inserts the fastener <NUM> between the upper end face of the antenna board <NUM> and the limiting protrusions <NUM> only by hands. In contrast, when the mounting is performed by using the operation portion <NUM>, operations for picking, placing, and mounting the fastener <NUM> are convenient.

A structure of the second convex portion <NUM> is not limited. To further prevent the second convex portion <NUM> from entering the gap between the lower end of the stopper <NUM> and the upper end face of the antenna board <NUM>, the second convex portion <NUM> may be a bump fixedly provided on the upper end face of the antenna board <NUM>. The bump may have a specific height, for example, a top end of the bump is substantially corresponding to a location at or above the middle of the stopper <NUM> and is below the limiting block <NUM>. Alternatively, as shown in <FIG> and <FIG>, the upper end face of the antenna board <NUM> is further fixedly provided with a baffle plate <NUM>, and the baffle plate <NUM> is upwardly bent towards one end of the first convex portion <NUM> to form the second convex portion <NUM>. The second convex portion <NUM> is a structure tilted on the upper end face of the antenna board <NUM>. The second convex portion <NUM> has a specific height to ensure that the second convex portion <NUM> can abut against a middle location of the stopper <NUM>. This further ensures that the second convex portion <NUM> does not enter the gap between the lower end of the stopper <NUM> and the upper end face of the antenna board <NUM>, thereby ensuring a stable limiting effect. When the second convex portion <NUM> is formed by bending the baffle plate <NUM>, the overall structure and a molding process can be further simplified.

The connection and fastening between the bump and the upper end face of the antenna board <NUM> and between the baffle plate <NUM> and the upper end face of the antenna board <NUM> are completed outside the mounting cavity <NUM>. Therefore, the connection and fastening between the bump and the upper end face of the antenna board <NUM> and between the baffle plate <NUM> and the upper end face of the antenna board <NUM> are not limited, for example, the fastening may be implemented by soldering or a fastener.

A specific mounting process of the antenna board <NUM> is shown in <FIG>. In <FIG>, neither the antenna board <NUM> nor the fastener <NUM> is mounted. As shown in <FIG>, the antenna board <NUM> is first mounted in the middle cavity body <NUM> of the mounting cavity <NUM>. Then, as shown in <FIG>, the fastening plate <NUM> of the fastener <NUM> is inserted between the upper end face of the antenna board <NUM> and the limiting protrusions <NUM> by using the operation portion <NUM>, the first convex portion <NUM> is located between the second convex portion <NUM> and the limiting protrusions <NUM>, and a location of the antenna board <NUM> is stable. Finally, the operation portion <NUM> is removed. A final product structure is shown in <FIG>.

In the embodiments of this application, a specific structure of the fastener is not limited. <FIG> show a fastener <NUM> in another embodiment. The fastener <NUM> is provided with a positioning protrusion <NUM>. The positioning protrusion <NUM> forms the first limiting structure. The antenna board <NUM> is provided with a positioning hole <NUM>. The positioning hole <NUM> forms the second limiting structure. After mounting, when the fastener <NUM> is clamped between the limiting portion and the upper end face of the antenna board <NUM>, the positioning protrusion <NUM> can be inserted into the positioning hole <NUM>, thereby limiting the fastener <NUM> and the antenna board <NUM> along the length direction. Cooperation between the positioning protrusion <NUM> and the positioning hole <NUM> is similar to the cooperation between the first convex portion <NUM> and the second convex portion <NUM>, and detachment between the fastener <NUM> and the limiting protrusions <NUM> that is caused by location movement of the fastener <NUM> can be prevented. When the positioning hole <NUM> cooperates with the positioning protrusion <NUM> to implement positioning, the overall structure can be simplified while a stable limiting effect can be ensured.

Specifically, a specific structure of the positioning protrusion <NUM> is not limited. For example, a protrusion structure may be formed by downwardly stamping the fastener <NUM>, or a protrusion structure may be integrally formed or additionally fastened on a lower end face of the fastener <NUM>. Certainly, in the embodiments of this application, alternatively, the fastener <NUM> may be provided with a positioning hole <NUM>, and the upper end face of the antenna board <NUM> may be provided with a positioning protrusion <NUM>. After the fastener <NUM> is mounted, the positioning protrusion <NUM> can be inserted into the positioning hole <NUM> to implement positioning cooperation.

After the positioning protrusion <NUM> is inserted into the positioning hole <NUM>, a location of the fastener <NUM> and that of the antenna board <NUM> are relatively fixed along the length direction. Since the antenna board <NUM> is mounted in the middle cavity body <NUM>, the antenna board <NUM> has a stable location along its length direction. Therefore, when the relative locations of the fastener <NUM> and the antenna board <NUM> are fixed, it can be ensured that the fastening plate <NUM> is not detached from the limiting protrusions <NUM> due to location movement.

Claim 1:
An electronic device, comprising a middle frame (<NUM>), an antenna board (<NUM>), and a fastener (<NUM>);
the middle frame (<NUM>) is provided with a mounting cavity (<NUM>), and an inner wall of the mounting cavity (<NUM>) is provided with a limiting portion; and
the antenna board (<NUM>) is placed in the mounting cavity (<NUM>), and the fastener (<NUM>) is clamped between the limiting portion and an upper end face of the antenna board (<NUM>), to restrict the antenna board (<NUM>) from moving upward along a depth direction of the mounting cavity (<NUM>).