WO2022227807A1

WO2022227807A1 - Middle frame assembly of extendable/retractable terminal, and extendable/retractable terminal

Info

Publication number: WO2022227807A1
Application number: PCT/CN2022/076902
Authority: WO
Inventors: 唐菊
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-04-30
Filing date: 2022-02-18
Publication date: 2022-11-03
Also published as: CN115277893A

Abstract

Embodiments of the present application relate to the technical field of antennas, and in particular to a middle frame assembly of an extendable/retractable terminal, and an extendable/retractable terminal. The middle frame assembly of an extendable/retractable terminal comprises an extendable/retractable middle frame and a fixed middle frame, and an antenna radiator is provided at a bezel at the edge of the extendable/retractable middle frame; when the extendable/retractable middle frame is in a retracted state, the extendable/retractable middle frame is hidden in the fixed middle frame; when the extendable/retractable middle frame is in an extended state, the extendable/retractable middle frame extends out of the fixed middle frame; in an extension/retraction process of the extendable/retractable middle frame, the shape of the antenna radiator can dynamically change.

Description

Retractable terminal midframe assembly and retractable terminal

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number "202110482624.1" and the application date is April 30, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference. Application.

technical field

The embodiments of the present application relate to the field of antenna technologies, and in particular, to a middle frame assembly of a retractable terminal and a retractable terminal.

Background technique

At present, as flexible screen technology becomes more and more mature, flexible screens provide infinite possibilities for the form of smart terminals. Various types of folding screen smart terminals have also been launched in the market, and retractable terminals, such as retractable mobile phones, have also appeared. However, the current retractable terminal cannot guarantee good antenna performance under different retractable forms.

SUMMARY OF THE INVENTION

An embodiment of the present application provides a middle frame assembly of a retractable terminal, including: a retractable middle frame and a fixed middle frame, the frame at the edge of the retractable middle frame has an antenna radiator; the retractable middle frame is located in When the retractable middle frame is in the retracted state, the retractable middle frame is hidden in the fixed middle frame; when the retractable middle frame is in the extended state, the retractable middle frame extends out of the fixed middle frame; During the expansion and contraction process, the shape of the antenna radiator is dynamically variable.

An embodiment of the present application further provides a retractable terminal, including: a circuit board and the above-mentioned middle frame assembly of the terminal, the circuit board has an antenna feed point and a ground point; the circuit board is arranged on the middle frame On the fixed middle frame of the assembly, both the antenna feed point and the ground point are electrically connected to the antenna radiator in the middle frame assembly.

Description of drawings

Figure 1(a) is a schematic front view of the middle frame assembly mentioned in the embodiment of the present application when it is in a retracted state;

Figure 1(b) is a schematic front view of the middle frame assembly mentioned in the embodiment of the present application when it is in an extended state;

Fig. 2 (a) is a kind of side schematic diagram when the middle frame assembly mentioned in the embodiment of the present application is in a retracted state;

Figure 2(b) is a schematic side view of the middle frame assembly mentioned in the embodiment of the present application when it is in an extended state;

Fig. 3 (a) is another front schematic view when the middle frame assembly mentioned in the embodiment of the present application is in a retracted state;

Figure 3(b) is another schematic front view of the middle frame assembly mentioned in the embodiment of the present application when it is in an extended state;

Fig. 4 (a) is another side schematic diagram when the middle frame assembly mentioned in the embodiment of the present application is in a retracted state;

Figure 4(b) is another schematic side view of the middle frame assembly mentioned in the embodiment of the present application when it is in an extended state;

FIG. 5(a) is a schematic front view of the retractable terminal according to an embodiment of the present application when it is in a retracted state;

FIG. 5(b) is a schematic front view of the retractable terminal according to an embodiment of the present application when it is in an extended state;

FIG. 6(a) is another schematic front view of the retractable terminal according to an embodiment of the present application when it is in a retracted state;

Fig. 6(b) is another schematic front view of the retractable terminal according to the embodiment of the present application when it is in an extended state.

Detailed ways

The main purpose of the embodiments of the present application is to provide a middle frame assembly of a retractable terminal and a retractable terminal, so as to ensure that the terminal has better antenna performance in different retractable forms to a certain extent.

In the embodiment of the present application, the middle frame assembly of the retractable terminal includes: a retractable middle frame and a fixed middle frame, the frame at the edge of the retractable middle frame has an antenna radiator; when the retractable middle frame is in a retracted state, the retractable middle frame The middle frame is hidden in the fixed middle frame. When the retractable middle frame is in the extended state, the retractable middle frame is stretched to be flush with the fixed middle frame; during the expansion and contraction of the retractable middle frame, the shape of the antenna radiator is dynamically variable and can be retracted. When the antenna radiator is in different forms, it can radiate in the frequency band required by the current form, and different forms can meet the radiation requirements of different frequency bands. For the frequency band required by the current form, the radiation efficiency of the retractable antenna radiator in the current form itself is high, and there is no loss of radiation efficiency, which can effectively improve the radiation efficiency, thereby effectively improving the antenna efficiency. That is, the middle frame assembly of the retractable terminal involved in the embodiments of the present application can be combined with the dynamically variable antenna radiator in the middle frame assembly during the terminal shrinking process, so that the retractable terminal can be guaranteed to a certain extent. Under different telescopic forms, all have better antenna performance.

In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clear, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that, in each embodiment of the present application, many technical details are provided for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be realized. The following divisions of the various embodiments are for the convenience of description, and should not constitute any limitation on the specific implementation of the present application, and the various embodiments may be combined with each other and referred to each other on the premise of not contradicting each other.

In some embodiments, most of the antennas in the retractable terminal have fixed antenna radiators, and the shape of the antenna radiators remains unchanged. In the telescopic form, all have better antenna performance. Therefore, an embodiment of the present application proposes a middle frame assembly of a retractable terminal, including: a retractable middle frame and a fixed middle frame, the frame at the edge of the retractable middle frame has an antenna radiator; when the retractable middle frame is in a retracted state , the retractable middle frame is hidden in the fixed middle frame; when the retractable middle frame is in the extended state, the retractable middle frame extends out of the fixed middle frame; during the retraction process of the retractable middle frame, the shape of the antenna radiator is dynamically To a certain extent, it is ensured that the retractable terminal has better antenna performance in different retractable forms.

In other embodiments, the adjustment range of the tuning amplitude of the tuning mode of the retractable terminal is relatively limited, and the antenna efficiency is low. The inventor found through research that the reason for this problem is that the antenna efficiency is determined by the radiation efficiency and reflectivity of the antenna radiator. Among them, the radiation efficiency of the antenna radiator is determined by the shape of the antenna radiator itself. If the shape of the antenna radiator itself remains unchanged, the radiation efficiency will not change. The antenna radiator with the same shape itself usually only has better radiation efficiency for a certain frequency band. If it is applied in other frequency bands, there will be a loss of radiation efficiency. Although the tuner or antenna tuning switch can be used for impedance tuning to reduce the loss caused by adapting to other frequency bands, the tuner or the antenna tuning switch can only tune in a small range to reduce the loss, and the tuning in a small range causes the tuning range to decrease. The range of adjustment is also limited. It can be seen that in order to adjust the efficiency of the antenna, the reflectivity can only be adjusted, but the adjustment of the reflectivity depends on the tuner or the antenna tuning switch. The tuning range of the tuner or the antenna tuning switch itself is limited, resulting in low antenna efficiency. Therefore, the embodiment of the present application can not only ensure that the terminal has good antenna performance in different telescopic forms to a certain extent, but also can expand the adjustment range of the tuning amplitude and improve the antenna efficiency.

The state of the middle frame assembly in this embodiment includes a retracted state and an extended state. The retracted state and the extended state can be specifically expressed as the state of the retractable middle frame. For example, when the retractable middle frame is in the retracted state, the state of the middle frame assembly is It is in the retracted state; when the retractable middle frame is in the extended state, the state of the middle frame assembly is the extended state. In specific implementation, the middle frame assembly may be any one of the following: a middle frame assembly that can be retracted up and down, a middle frame assembly that can be retracted left and right, and a middle frame assembly that can be retracted up and down as well as left and right. Wherein, the vertically retractable middle frame assembly can be understood as: the retractable middle frame in the middle frame assembly can be retracted up and down relative to the fixed middle frame. The left and right retractable middle frame assembly can be understood as: the retractable middle frame in the middle frame assembly can be left and right retractable relative to the fixed middle frame. The middle frame assembly that can be stretched up and down as well as left and right can be understood as: the retractable middle frame in the middle frame assembly can be stretched left and right or up and down relative to the fixed middle frame. The middle frame component in this embodiment may be applied to a retractable terminal, such as a retractable mobile phone, a retractable tablet computer, and the like. The scalable terminal may be: a terminal that can be extended up and down, a terminal that can be extended left and right, and a terminal that can be extended up and down as well as left and right, which is not specifically limited in this embodiment.

The middle frame component of this embodiment is applied to a retractable terminal, and the retractable terminal can be extended up and down (or left and right), that is, the length (or width) dimension of the retractable terminal will change according to the expansion and contraction situation, and the width (or length) dimension constant. Such a retractable terminal may adopt the middle frame assembly in the embodiment of the present application. The implementation details of the middle frame component of the retractable terminal in this embodiment will be specifically described below. The following content is only provided for the convenience of understanding, and is not necessary for implementing this solution.

In one embodiment, reference may be made to FIG. 1( a ) for a schematic front view of the middle frame assembly of the retractable terminal in a retracted state, and reference to FIG. 1( b ) for a schematic front view of the middle frame assembly in an extended state. The middle frame assembly includes: a retractable middle frame 101 and a fixed middle frame 102, and a frame 103 at the edge of the retractable middle frame 101 has an antenna radiator. When the retractable middle frame 101 is in a retracted state, referring to FIG. 1( a ), the retractable middle frame 101 is hidden in the fixed middle frame 102 . It can be understood that since the retractable middle frame 101 is hidden in the fixed middle frame 102, it is actually invisible in FIG. 1(a). When the retractable middle frame 101 is in an extended state, referring to FIG. 1( b ), the retractable middle frame 101 extends out of the fixed middle frame 102 . During the expansion and contraction process of the retractable middle frame 101, the shape of the antenna radiator is dynamically variable. For example, during the expansion and contraction process of the retractable middle frame 101, the radiation area of the antenna radiator changes dynamically, thereby increasing the radiation efficiency of the antenna radiator. change. The expansion and contraction of the retractable middle frame 101 can be controlled by software or other mechanical means. In the embodiment of the present application, during the expansion and contraction of the retractable middle frame 101 , the shape of the antenna radiator is dynamically variable, which means that the radiation efficiency of the antenna radiator changes during the expansion and contraction of the retractable middle frame 101 .

The antenna radiator is a metal conductor. In one example, the frame 103 at the edge of the retractable middle frame 101 is a metal frame, and the antenna radiator is a metal frame. That is to say, if the frame 103 itself is a metal frame, the metal frame itself can be used as an antenna radiator, and there is no need to specially manufacture an antenna radiator, which is beneficial to simplify the structure of the middle frame assembly. Through the expansion and contraction of the retractable middle frame 101, the length of the antenna radiator can be changed, thereby changing the resonant frequency of the antenna. In another example, the frame 103 at the edge of the retractable middle frame 101 is not a metal frame, such as a plastic frame, and an antenna radiator can be provided on the frame 103 so that the frame 103 can have an antenna radiator.

In a specific implementation, the frame 104 fixing the edge of the middle frame 102 may also have an antenna radiator, so that more positions on the middle frame assembly can be used to realize the function of the antenna. Optionally, the frame of the retractable middle frame 101 and the frame of the fixed middle frame 102 may both be metal frames.

In one example, the retractable length of the antenna radiator is determined based on the operating frequency band required by the antenna radiator, and the larger the upper limit frequency in the operating frequency band, the smaller the retractable length of the antenna radiator. In a specific implementation, if a piece of metal frame itself is used as the antenna radiator, the retractable length of the metal frame itself can determine the retractable length of the antenna radiator. Therefore, it can be understood that the stretchable length of the metal frame itself can be determined based on the working frequency band required by the antenna radiator, and the higher the upper limit frequency in the working frequency band, the smaller the stretchable length of the metal frame. With this arrangement, when the antenna radiator stretches to different lengths and presents different shapes, it can well match the working frequency band required by the current shape, which is beneficial for the terminal to have good antenna performance in different states.

In one example, reference may be made to FIG. 2( a ) for a schematic side view of the middle frame assembly of the retractable terminal in a retracted state, and reference to FIG. 2( b ) for a schematic side view of the middle frame assembly in an extended state. It can be seen from FIG. 2( a ) that the frame 103 of the retractable middle frame 101 is hidden in the frame 104 of the fixed middle frame 102 . It can be seen from FIG. 2( b ) that the frame 103 of the retractable middle frame 101 extends out of the fixed middle frame 102 . Border 104 of box 102 . It should be noted that FIG. 2(a) and FIG. 2(b) are only schematic diagrams showing that the frame 103 can be stretched relative to the frame 104 for the convenience of understanding. In specific implementation, the frame 103 can be stretched relative to the frame 104 in other ways. , which is not specifically limited in this embodiment.

In this embodiment, during the expansion and contraction of the retractable middle frame, the shape of the antenna radiator is dynamically variable. When the retractable antenna radiator is in different shapes, it can radiate in the frequency band required by the current shape, and different shapes can meet different requirements. radiation requirements of the frequency band. For the frequency band required by the current form, the radiation efficiency of the retractable antenna radiator in the current form itself is high, and there is no loss of radiation efficiency, which can effectively improve the radiation efficiency, thereby effectively improving the antenna efficiency. Moreover, during the dynamic change of the shape of the retractable antenna radiator, the radiation area will change, which can be regarded as a tuning method. Since the retractable antenna radiator is dynamically extensible and has a large shrinkage rate, the adjustment range of the tuning range can be expanded. .

In one embodiment, the fixed middle frame in the middle frame assembly includes: a first fixed middle frame and a second fixed middle frame, the first fixed middle frame and the second fixed middle frame are in a state of disconnected electrical connection; the retractable middle frame When the frame is in the retracted state, the retractable middle frame is hidden in the first fixed middle frame; when the retractable middle frame is in the extended state, the retractable middle frame is located between the first fixed middle frame and the second fixed middle frame. For example, referring to FIG. 1( a ) and FIG. 1( b ), the fixed middle frame 102 includes: a first fixed middle frame 1021 and a second fixed middle frame 1022 , and the first fixed middle frame 1021 and the second fixed middle frame 1022 are located in In the state where the electrical connection is disconnected, the place where the electrical connection is disconnected can be regarded as the open end of a section of the antenna. The first fixed middle frame 1021 and the second fixed middle frame 1022 can be filled with fillers when the electrical connection is disconnected. The fixed middle frame 1021 and the second fixed middle frame 1022 can be formed as a whole in appearance through the filler. The filler can be a material such as plastic that can electrically disconnect the first fixed middle frame 1021 and the second fixed middle frame 1022, and the filler can be formed by an in-film injection molding process. When the retractable middle frame 101 is in the retracted state, the retractable middle frame 101 is hidden in the first fixed middle frame 1021; when the retractable middle frame 101 is in the extended state, the retractable middle frame 101 is located between the first fixed middle frame 1021 and the second fixed middle frame 1021. between the fixed middle frame 1022. At this time, since the retractable middle frame 101 protrudes from the first fixed middle frame 1021, the first fixed middle frame 1021 and the second fixed middle frame 1022 in the position where the electrical connection is disconnected become the retractable middle frame 101 and the second fixed middle frame 1022. The fixed midframe 1022 is in a position where the electrical connection is disconnected. This embodiment facilitates that the retractable middle frame can be hidden into the first fixed middle frame or extended from the first fixed middle frame during the expansion and contraction process.

It can be understood that FIG. 1( a ) and FIG. 1( b ) are equivalent to the retractable middle frame 101 extending up and down relative to the fixed middle frame 102 , and the frame 103 includes: a left frame 1031 located at the left edge of the retractable middle frame 101 . The right side frame 1032 located at the right edge of the retractable middle frame 101, the left side frame 1031 and the right side frame 1032 are symmetrically arranged. The left side frame 1031 and the right side frame 1032 are symmetrically arranged, that is, the stretchable degrees of the left side frame 1031 and the right side frame 1032 are the same, so that the left side frame and the right side frame are also stretched during the stretching process of the stretchable middle frame. , the symmetrical left frame and right frame can block the possible structural parts in the retractable middle frame and improve the aesthetics of the middle frame assembly.

In this embodiment, it is equivalent to that one end of the retractable metal middle frame is fixed, and the other end can be elongated or shortened relative to the fixed middle frame. One end of the retractable metal middle frame can be fixed with one end of the fixed middle frame. For example, in FIG. 1(b), one end of the retractable metal middle frame 101 is fixed with one end of the first fixed middle frame 1021, so as to realize the flexible When the retractable metal middle frame is retracted, the up and down retraction of the antenna radiator can be realized, which can effectively improve the radiation efficiency, thereby effectively improving the antenna efficiency. That is, the middle frame assembly of the terminal involved in the embodiments of the present application can be combined with the dynamically variable antenna radiator in the middle frame assembly in the process of up and down expansion of the terminal, so as to ensure that the terminal is in different expansion and contraction forms to a certain extent. All have good antenna performance. Moreover, during the dynamic change of the shape of the retractable antenna radiator, the radiation area will change, which can be regarded as a tuning method. Since the retractable antenna radiator is dynamically extendable and has a large shrinkage rate, it can expand the tuning range. Adjust the range.

Optionally, when the frame of the retractable middle frame 101 and the frame of the fixed middle frame 102 are both metal frames, this embodiment is equivalent to dividing the metal frame on the left and right (upper and lower) sides into two separate sections (the two sections may be The first fixed middle frame 1021 and the second fixed middle frame 1022) or more than two sections, the metal middle frame of two or more sections is disconnected and electrically disconnected. One section (the retractable middle frame 101 ) can be controlled to expand and contract through software or other mechanical methods; the other sections of the metal frame have a fixed length.

In one embodiment, the retractable middle frame in the middle frame assembly includes: a first retractable middle frame and a second retractable middle frame, the antenna radiator includes: a first antenna radiator and a second antenna radiator, the first The frame at the edge of the retractable middle frame has a first antenna radiator, and the frame at the edge of the second retractable middle frame has a second antenna radiator; when the first retractable middle frame and the second retractable middle frame are in a retracted state, The first retractable middle frame is hidden in the first preset position of the fixed middle frame, and the second retractable middle frame is hidden in the second preset position of the fixed middle frame; the first retractable middle frame and the second retractable middle frame are in In the extended state, the first retractable middle frame and the second retractable middle frame respectively extend outward along both ends of the fixed middle frame; during the expansion and contraction of the first retractable middle frame, the shape of the first antenna radiator can be dynamically adjusted. The shape of the second antenna radiator is dynamically variable during the expansion and contraction process of the second retractable middle frame. The first preset position and the second preset position may be set according to actual needs, and the first preset position and the second preset position may be the same or different, and may also partially overlap.

For example, referring to FIG. 3( a ) and FIG. 3( b ), the middle frame assembly includes: a first retractable middle frame 201 and a second retractable middle frame 202 , and the frame 203 at the edge of the first retractable middle frame 201 has a An antenna radiator, and the frame 204 at the edge of the second retractable middle frame 202 has a second antenna radiator. When the first retractable middle frame 201 and the second retractable middle frame 202 are in a retracted state, please refer to FIG. 3(a), the first retractable middle frame 201 is hidden in the first preset position of the fixed middle frame 205, and the second The retractable middle frame 202 is hidden in the second preset position of the fixed middle frame 205, that is, in FIG. 3(a), the first retractable middle frame 201 and the second retractable middle frame 202 are hidden and cannot be seen from the front. arrive. When the first retractable middle frame 201 and the second retractable middle frame 202 are in the extended state, please refer to FIG. Both ends extend outward; during the expansion and contraction of the first retractable middle frame 201, the shape of the first antenna radiator is dynamically variable, and during the expansion and contraction of the second retractable middle frame 202, the shape of the second antenna radiator Dynamically variable. In this embodiment, the frame 203 and the frame 204 may be metal frames, then the frame 203 itself may serve as the first antenna radiator, and the frame 204 itself may serve as the second antenna radiator.

The stretchable length of the first antenna radiator may be determined based on the first working frequency band required by the first antenna radiator. The higher the upper limit frequency in the first working frequency band, the smaller the stretchable length of the first antenna radiator. The smaller the upper limit frequency in the first working frequency band, the greater the stretchable length of the first antenna radiator. The stretchable length of the second antenna radiator can be determined based on the second working frequency band required by the second antenna radiator. The smaller the upper limit frequency in the working frequency band, the larger the stretchable length of the second antenna radiator. In a specific implementation, the stretchable length of the first antenna radiator and the stretchable length of the second antenna radiator may be the same or different, which is beneficial to meet different requirements for working frequency bands in practical applications.

In a specific implementation, the frame 206 fixing the edge of the middle frame 205 may also have an antenna radiator, so that more positions on the middle frame assembly can be used to realize the function of the antenna. Optionally, the frame 203, the frame 204, and the frame 206 may all be metal middle frames.

In one embodiment, the fixed middle frame includes: a third fixed middle frame, a fourth fixed middle frame and a fifth fixed middle frame, the third fixed middle frame and the fifth fixed middle frame are respectively located at two ends of the fourth fixed middle frame , the third fixed middle frame and the fourth fixed middle frame are in a state of disconnected electrical connection, the fourth fixed middle frame and the fifth fixed middle frame are in a state of disconnected electrical connection; the first retractable middle frame and the second retractable middle frame When the middle frame is in a retracted state, the first retractable middle frame is hidden in the first preset position of the fourth fixed middle frame, and the second retractable middle frame is hidden in the second preset position of the fourth fixed middle frame; When the telescopic middle frame and the second telescopic middle frame are in the stretched state, the first telescopic middle frame extends in a direction close to the third fixed middle frame, and the second telescopic middle frame extends in a direction close to the fifth fixed middle frame.

For example, referring to FIG. 3( a ) and FIG. 3( b ), the fixed middle frame 205 includes: a third fixed middle frame 2051 , a fourth fixed middle frame 2052 and a fifth fixed middle frame 2053 , the third fixed middle frame 2051 and the The fifth fixed middle frame 2053 is located at both ends of the fourth fixed middle frame 2052, the third fixed middle frame 2051 and the fourth fixed middle frame 2052 are in a disconnected state, and the fourth fixed middle frame 2052 and the fifth fixed middle frame 2052 are in a disconnected state. Block 2053 is in a state where the electrical connection is disconnected. The third fixed middle frame 2051 and the fourth fixed middle frame 2052 may be filled with filler at the position where the electrical connection is disconnected. The fourth fixed middle frame 2052 and the fifth fixed middle frame 2053 may be filled with filler in the position where the electrical connection is disconnected. The third fixed middle frame 2051, the fourth fixed middle frame 2052 and the fifth fixed middle frame 2053 can be formed as a whole in appearance through the filler. The filler can be a material such as plastic that can realize electrical disconnection, and the filler can be formed by an in-film injection molding process. When the first retractable middle frame 201 and the second retractable middle frame 202 are in a retracted state, please refer to FIG. 3(a), the first retractable middle frame 201 is hidden in the first preset position of the fourth fixed middle frame 2052, The second retractable middle frame 202 is hidden at the second preset position of the fourth fixed middle frame 2052 . When the first retractable middle frame 201 and the second retractable middle frame 202 are in the extended state, please refer to FIG. 3(b), the first retractable middle frame 201 extends in a direction close to the third fixed middle frame 2051, and the second retractable middle frame 201 The telescopic middle frame 202 extends in a direction close to the fifth fixed middle frame 2053 . The frame 206 includes: a frame 2061 of the third fixed middle frame 2051 , a frame 2062 of the fourth fixed middle frame 2052 , and a frame 2063 of the fifth fixed middle frame 2053 . The place where the electrical connection is disconnected can be regarded as the open end of a section of the antenna, and multiple breakpoints can provide multiple open ends, which is beneficial to meet the needs of setting up a multi-section antenna.

It can be understood that Fig. 3(a) and Fig. 3(b) are equivalent to the telescopic middle frame extending left and right relative to the fixed middle frame. The frame includes: an upper frame positioned on the upper edge of the retractable middle frame and a lower frame positioned at the lower edge of the retractable middle frame, and the upper frame and the lower frame are symmetrically arranged. For example, in FIG. 3(b), the frame 203 includes an upper frame 2031 and a lower frame 2032, the upper frame 2031 and the lower frame 2032 are symmetrically arranged, and the frame 204 includes an upper frame 2041 and a lower frame 2042, and the upper frame 2041 and the lower frame 2042. 2041 and the lower side frame 2042 are symmetrically arranged. That is to say, the stretchable degrees of the upper side frame 2031 and the lower side frame 2032 are the same, and the stretchable degrees of the upper side frame 2041 and the lower side frame 2042 are the same, so that the upper side frame and the lower side frame are stretched during the stretching process. The side frame also expands and contracts accordingly, and the symmetrical upper frame and lower frame can block possible structural members in the retractable middle frame, thereby improving the aesthetics of the middle frame assembly.

In one example, reference may be made to FIG. 4( a ) for a schematic side view of the middle frame assembly of the retractable terminal when the middle frame assembly is in a retracted state, and reference to FIG. 4( b ) for a schematic side view of the middle frame assembly when the middle frame assembly is in an extended state. It can be seen from Figure 4(a) that the frame 2031 and the frame 2041 are hidden in the frame 2062, the frame 2031 is hidden at the first preset position of the frame 2062, the frame 2041 is hidden at the second preset position of the frame 2062, and the first preset position The position and the second preset position have been framed by dotted lines, and it can be seen that the first preset position and the second preset position are different positions. It can be seen from FIG. 4( b ) that the frame 2031 and the frame 2041 protrude from the frame 2062 . It should be noted that FIG. 4(a) and FIG. 4(b) are only schematic diagrams showing that the frame 2031 and the frame 2041 are retractable relative to the frame 2062 for the convenience of understanding. In the specific implementation, the frame 2031 and the frame can also be realized in other ways. The frame 2041 is retractable relative to the frame 2062, which is not specifically limited in this embodiment.

In this embodiment, it is equivalent to the middle fixation of the retractable metal middle frame, and both ends can be extended or shortened relative to the fixed middle frame, that is, both ends of the fixed middle frame can be extended and retracted, which improves the flexibility of extension and retraction. One end of the first retractable metal middle frame can be fixed with the first end of the fixed middle frame, and one end of the second retractable metal middle frame can be fixed with the fixed middle frame (such as the fifth fixed middle frame in FIG. 3(a) ). ) of the second end is fixed, so as to realize the left and right expansion and contraction of the antenna radiator, which can effectively improve the radiation efficiency, thereby effectively improving the antenna efficiency. That is, the middle frame assembly of the terminal involved in the embodiments of the present application can be combined with the dynamically variable antenna radiator in the middle frame assembly in the process of the retractable terminal extending left and right, so as to ensure that the terminal can be stretched at different times to a certain extent. Under the condition, all have better antenna performance. Moreover, in the process of dynamic change of the shape of the retractable antenna radiator, the radiation area will change, which can be regarded as a tuning method. Since the retractable antenna radiator is dynamically scalable and has a large shrinkage rate, it can expand the tuning range. Adjust the range.

The embodiment of the present application also relates to a retractable terminal, including a circuit board and the middle frame assembly of the retractable terminal described in any of the above embodiments, the circuit board is provided with an antenna feed point and a ground point; the circuit board is arranged on the On the fixed middle frame of the middle frame assembly, both the antenna feed point and the ground point are electrically connected to the antenna radiator in the middle frame assembly. It can be understood that the states of the retractable terminal in this embodiment include an extended state and a retracted state. When the retractable terminal is in the extended state, the middle frame assembly is in the extended state, and when the retractable terminal is in the retracted state, the middle frame assembly is in the extended state. The frame component is now in a collapsed state. Compared with arranging the circuit board on the fixed middle frame of the middle frame assembly, the cost is lower and the production is simpler.

In one example, the retractable terminal further includes a tuning element, and the tuning element is disposed at the antenna feed point or the ground point, and is used to adjust the working frequency band of the antenna radiator. By setting the tuning element, it is beneficial to better optimize the impedance and improve the antenna performance of the retractable terminal in different retractable forms.

In one example, the tuning element includes: a tuner and/or an antenna tuning switch; where the tuning element includes a tuner, the tuner is set at the antenna feed point; where the tuning element includes an antenna tuning switch, the antenna tuning switch is set at the ground point. Among them, the tuner can be understood as a device that integrates multiple tuning switches and variable capacitors. The tuner can perform impedance matching through changes in capacitance and combinations of different switches. Antenna tuning switch usually refers to a single tuning switch. In specific implementation, the number of tuners and/or antenna tuning switches to be set may be selected according to actual needs to meet different tuning requirements. In this embodiment, while the shape of the antenna radiator is dynamically variable, impedance tuning is performed through the matched tuner and/or antenna tuning switch, which more effectively improves the antenna efficiency, and can make the retractable terminal perform well in different retractable states. antenna performance.

In an example, the schematic diagram of the retractable terminal may refer to FIGS. 5(a) and 5(b), 5(a) is a schematic diagram of the retractable terminal in a retracted state, and FIG. 5(b) is a schematic diagram of the retractable terminal in a retracted state. Schematic diagram of the stretched state. As can be seen from Figures 5(a) and 5(b), the middle frame assembly of the retractable terminal in Figure 5(a) is the middle frame assembly shown in Figure 1(a), and the retractable terminal in Figure 5(b) The middle frame assembly of the type terminal is the middle frame assembly shown in Figure 1(b). The circuit board 500 includes a main board 501 and a sub-board 502 . The main board 501 is disposed on the first fixed middle frame 1021 , the sub-board 502 is disposed on the first fixed middle frame 1022 , and the first fixed middle frame 1022 is further provided with a battery 502 . The antenna feed point and the ground point are set on the main board 501, and both the antenna feed point and the ground point are electrically connected to the antenna radiator of the first fixed middle frame 1021 in the middle frame assembly, thereby realizing the antenna function of the retractable terminal. A tuner 504 is set on the antenna feed point, and the antenna tuning switch 505 set on the ground point includes: a first antenna tuning switch 5051 set on the ground point 1 and a second antenna tuning switch 5052 set on the ground point 2 . The retractable terminal performs impedance matching through the tuner 504, the first antenna tuning switch 5051 and the second antenna tuning switch 5052, so that the antenna resonates in the required frequency band, so as to effectively improve the antenna efficiency. In a specific implementation, after each expansion and contraction, impedance matching can be performed again through the tuner 504, the first antenna tuning switch 5051 and the second antenna tuning switch 5052, so that the antenna can achieve optimal performance in the current expansion and contraction state.

In an example, the schematic diagram of the retractable terminal may refer to FIGS. 6(a) and 6(b), 6(a) is a schematic diagram of the retractable terminal in a retracted state, and FIG. 6(b) is a schematic diagram of the retractable terminal in a retracted state. Schematic diagram of the stretched state. As can be seen from Figures 6(a) and 6(b), the middle frame assembly of the retractable terminal in Figure 6(a) is the middle frame assembly shown in Figure 3(a), and the retractable terminal in Figure 6(b) The middle frame assembly of the type terminal is the middle frame assembly shown in Figure 3(b). The circuit board 600 includes a main board 601 and a sub-board 602, the sub-board 602 includes a first sub-board 6021 and a second sub-board 6022, the main board 601 is arranged in the fifth fixed middle frame 2053, and the first sub-board 6021 is arranged in the third fixed middle frame In 2053, a battery 603 is also provided in the third fixed middle frame 2053. The antenna feed point and the ground point are set on the second sub-board 6022, and both the antenna feed point and the ground point are electrically connected to the antenna radiator of the third fixed middle frame 2052 in the middle frame assembly, so as to realize the antenna function of the retractable terminal . A tuner 604 is set on the antenna feed point, and the antenna tuning switch 605 set on the ground point includes: a first antenna tuning switch 6051 set on the ground point 1 and a second antenna tuning switch 6052 set on the ground point 2 . The retractable terminal performs impedance matching through the tuner 604, the first antenna tuning switch 6051 and the second antenna tuning switch 6052, so that the antenna resonates in the required frequency band, so as to effectively improve the antenna efficiency. In a specific implementation, after each expansion and contraction, impedance matching can be performed again through the tuner 604, the first antenna tuning switch 6051 and the second antenna tuning switch 6052, so that the antenna can achieve optimal performance in the current expansion and contraction state.

It should be noted that the above examples in the embodiments of the present application are all examples for easy understanding, and do not constitute a limitation on the technical solutions of the present application. In addition, in order to highlight the innovative part of the present application, this embodiment does not introduce devices that are not closely related to solving the technical problems raised in the present application, but this does not mean that there are no other devices in the terminal of this embodiment. .

The retractable terminal in this embodiment has a retractable dynamic adaptive antenna, that is, the shape of the antenna radiator is dynamically variable, which can effectively improve the radiation efficiency of the antenna. Impedance tuning can more effectively improve the antenna efficiency, and can make the retractable terminal have good antenna performance in different retractable states. Especially when there are more and more terminal antennas in the fifth generation mobile communication technology (5th generation mobile networks or 5th generation wireless systems, 5th-Generation, 5G for short) and the space is getting tighter and tighter, the telescopic dynamic adaptive antenna can Give full play to the space advantage and improve the antenna performance of the whole machine.

Those of ordinary skill in the art can understand that the above-mentioned embodiments are specific examples for realizing the present application, and in practical applications, various changes can be made in form and details without departing from the spirit and the spirit of the present application. scope.

Claims

A middle frame assembly of a retractable terminal, comprising: a retractable middle frame and a fixed middle frame, the frame of the edge of the retractable middle frame has an antenna radiator;

When the retractable middle frame is in a retracted state, the retractable middle frame is hidden from the fixed middle frame;

When the retractable middle frame is in an extended state, the retractable middle frame extends out of the fixed middle frame;

During the expansion and contraction of the retractable middle frame, the shape of the antenna radiator is dynamically variable.
The middle frame assembly of a retractable terminal according to claim 1, wherein the fixed middle frame comprises: a first fixed middle frame and a second fixed middle frame, the first fixed middle frame and the second fixed middle frame The middle frame is in a state of electrical disconnection;

When the retractable middle frame is in a retracted state, the retractable middle frame is hidden in the first fixed middle frame;

When the retractable middle frame is in an extended state, the retractable middle frame is located between the first fixed middle frame and the second fixed middle frame.
The middle frame assembly of a retractable terminal according to claim 1, wherein the retractable middle frame comprises: a first retractable middle frame and a second retractable middle frame, and the antenna radiator comprises: a first antenna A radiator and a second antenna radiator, the frame of the edge of the first retractable middle frame has the first antenna radiator, and the frame of the edge of the second retractable middle frame has the second antenna radiator ;

When the first retractable middle frame and the second retractable middle frame are in a retracted state, the first retractable middle frame is hidden in the first preset position of the fixed middle frame, and the second retractable middle frame hidden in the second preset position of the fixed middle frame;

When the first retractable middle frame and the second retractable middle frame are in an extended state, the first retractable middle frame and the second retractable middle frame respectively extend outward along both ends of the fixed middle frame;

During the expansion and contraction of the first retractable middle frame, the shape of the first antenna radiator is dynamically variable, and during the expansion and contraction of the second retractable middle frame, the shape of the second antenna radiator changes. Dynamically variable.
The middle frame assembly of a retractable terminal according to claim 3, wherein the fixed middle frame comprises: a third fixed middle frame, a fourth fixed middle frame and a fifth fixed middle frame, the third fixed middle frame and the fifth fixed middle frame are respectively located at both ends of the fourth fixed middle frame, the third fixed middle frame and the fourth fixed middle frame are in a state of disconnected electrical connection, and the fourth fixed middle frame is in a disconnected state. The frame and the fifth fixed middle frame are electrically disconnected;

When the first retractable middle frame and the second retractable middle frame are in a retracted state, the first retractable middle frame is hidden in the first preset position of the fourth fixed middle frame, and the second retractable middle frame is The middle frame is hidden in the second preset position of the fourth fixed middle frame;

When the first retractable middle frame and the second retractable middle frame are in the extended state, the first retractable middle frame extends toward the direction close to the third fixed middle frame, and the second retractable middle frame extends toward the direction of the third fixed middle frame. Extend in the direction close to the fifth fixed middle frame.
The middle frame assembly of the retractable terminal according to any one of claims 1 to 4, wherein the frame of the edge of the retractable middle frame is a metal frame, and the antenna radiator is the metal frame.
The middle frame assembly of a retractable terminal according to any one of claims 1 to 5, wherein the retractable middle frame is retractable up and down relative to the fixed middle frame, and the frame comprises: The left border of the left edge of the frame and the right border of the right edge of the retractable middle frame, the left border and the right border are symmetrically arranged;

or,

The retractable middle frame is left and right telescopic relative to the fixed middle frame, and the frame includes: an upper frame located on the upper edge of the retractable middle frame and a lower frame positioned at the lower edge of the retractable middle frame, The upper side frame and the lower side frame are symmetrically arranged.
The middle frame assembly of the retractable terminal according to any one of claims 1 to 6, wherein the retractable length of the antenna radiator is determined based on a working frequency band required by the antenna radiator, and the working frequency band is in the The higher the upper limit frequency, the smaller the retractable length of the antenna radiator.
A retractable terminal, comprising: a circuit board and a middle frame assembly of the terminal according to any one of claims 1 to 7, wherein the circuit board has an antenna feed point and a ground point;

The circuit board is arranged on the fixed middle frame of the middle frame assembly, and both the antenna feed point and the ground point are electrically connected to the antenna radiator in the middle frame assembly.
The retractable terminal of claim 8, further comprising: a tuning element;

The tuning element is arranged at the antenna feed point or the ground point, and is used to adjust the working frequency band of the antenna radiator.
The retractable terminal according to claim 9, wherein the tuning element comprises: a tuner and/or an antenna tuning switch;

In the case that the tuning element includes the tuner, the tuner is arranged at the antenna feed point;

Where the tuning element includes the antenna tuning switch, the antenna tuning switch is provided at the ground point.