Stretching apparatus, display apparatus, and stretching control method

Abstract

This invention discloses a stretching device, a display device, and a stretching control method, relating to the field of display technology. The stretching device includes a fixed base, a vibration drive component, a stretching body, a reset drive structure, and a control valve. A cavity is formed within the fixed base. A vibrating diaphragm is disposed within the cavity, dividing the cavity into a first air chamber and a second air chamber, which are isolated from each other. The vibration drive component is disposed on the fixed base and can emit vibration waves into the first air chamber. One end of the stretching body is slidably disposed in the second air chamber. The other end of the stretching body is located outside the second air chamber and can move closer to or away from the fixed base along a first direction. The reset drive structure can drive the end of the stretching body located outside the second air chamber to move closer to the fixed base. The control valve is connected to the second air chamber and can control the intake of external gas into the second air chamber or control the discharge of gas from the second air chamber. This invention improves the reliability of the display screen during the stretching and contraction process of the display device.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a stretching device, a display device, and a stretching control method. Background Technology

[0002] As the demand for displays in display devices increases, stretchable displays are gaining popularity. However, the stretchability of traditional displays relies mainly on flexible materials. When the display is large, the reliability of displays using flexible materials is low during the stretching process, and large-size displays tend to generate more heat during use, which can have a significant impact on the display device. Summary of the Invention

[0003] The main objective of this invention is to provide a stretching device, a display device, and a stretching control method, which aims to improve the low reliability of traditional display screens during the stretching process.

[0004] To achieve the above objectives, the present invention proposes a stretching device comprising a fixed base, a vibrating diaphragm, a vibration driving element, a stretching body, a reset driving structure, and a control valve. A cavity is formed within the fixed base. The vibrating diaphragm is disposed within the cavity, dividing the cavity into a first air chamber and a second air chamber, which are isolated from each other. The vibration driving element is disposed on the fixed base and can emit vibration waves into the first air chamber. One end of the stretching body is slidably disposed in the second air chamber. The other end of the stretching body is located outside the second air chamber and can move closer to or away from the fixed base along a first direction. The reset driving structure can drive the end of the stretching body located outside the second air chamber to move closer to the fixed base. The control valve is connected to the second air chamber and can control the intake of external gas into the second air chamber or control the discharge of gas from the second air chamber.

[0005] In one embodiment, the cavity wall of the second air chamber has an air inlet and a pressure relief port; the control valve includes:

[0006] A first one-way valve, installed at the air inlet, is used to unidirectionally introduce outside gas into the second air chamber; and A pressure relief valve is installed at the pressure relief port to discharge gas from the second air chamber.

[0007] In one embodiment, the second air chamber includes: The first sub-chamber is located close to the vibrating diaphragm, and the air inlet is located on the cavity wall of the first sub-chamber. The second sub-chamber is located on the side of the first sub-chamber away from the vibrating diaphragm and is connected to the first sub-chamber. The pressure relief port is located on the cavity wall of the second sub-chamber. The control valve also includes a second one-way valve, which is located between the first sub-chamber and the second sub-chamber to unidirectionally introduce gas from the first sub-chamber into the second sub-chamber.

[0008] In one embodiment, the volume of the second sub-chamber is smaller than the volume of the first sub-chamber.

[0009] In one embodiment, the reset drive structure includes a reset elastic member extending along the first direction, with one end of the reset elastic member connected to the fixed base and the other end connected to the tension body; And / or, the reset drive structure includes a first magnetic suction member and a second magnetic suction member, the first magnetic suction member and the second magnetic suction member are respectively disposed on the fixed base and the stretching body, and the first magnetic suction member and the second magnetic suction member are arranged opposite to each other along the first direction.

[0010] In one embodiment, the stretching body includes: A support plate, wherein the support plate is disposed outside the fixed base; and At least two pull rods, one end of which extends into the second air chamber and can slide within the second air chamber, and the other end of which is connected to the support plate.

[0011] In one embodiment, the vibration driving element is a sound device, the sound device comprising: A sound-emitting unit, the sound-emitting side of which faces the first air chamber; the sound-emitting unit is equipped with a wireless charging receiving coil. A wireless charging transmitting coil, wherein the wireless charging transmitting coil is magnetically connected to the wireless charging receiving coil; and A power switch, which is electrically connected to the wireless charging transmitting coil.

[0012] The present invention also proposes a display device based on the above-mentioned stretching device, comprising: The display main layer has a light-emitting side and a backlight side that are disposed opposite to each other; A stretching device, wherein the stretching device is as described above, and the stretching device is disposed on the backlight side of the display body layer; and The outer casing, the display body layer and the stretching device are both installed inside the outer casing, and the side of the outer casing near the stretching body can move in the first direction.

[0013] The present invention also proposes a tension control method based on the above-mentioned tensioning device, the tension control method comprising: Obtain the action command of the stretching device, wherein the action command includes a stretching state command and a reset state command; The obtained action command is a stretching state command; The vibration drive is activated to cause the diaphragm to reciprocate. The control valve is opened, and the control valve controls the outside gas to be drawn into the second gas chamber, while controlling the gas in the second gas chamber not to be discharged.

[0014] In one embodiment, the cavity wall of the second air chamber is provided with an air inlet and a pressure relief port; the control valve includes a first check valve and a pressure relief valve, the first check valve is installed at the air inlet to unidirectionally introduce external gas into the second air chamber; the pressure relief valve is installed at the pressure relief port to discharge the gas in the second air chamber; After the step of obtaining the action command of the tensioning device, the method further includes: The obtained action command is a reset state command; Control the opening of the pressure relief valve; Detect whether the stretching body has reached the preset position; When the tensioning body is detected to have reached a preset position, the opening of the pressure relief valve is reduced, and the opening of the pressure relief valve is the same as the opening of the first one-way valve, or the vibration drive, the pressure relief valve and the first one-way valve are all closed.

[0015] In the technical solution of this invention, the vibrating diaphragm of the stretching device is disposed within the cavity of the fixed base, and the cavity is divided into a first air chamber and a second air chamber that are isolated from each other. The vibration driving member is disposed on the fixed base and emits vibration waves into the first air chamber. One side of the vibrating diaphragm can receive the vibration waves emitted by the vibration driving member and transmit the vibration waves into the second air chamber through the other side of the vibrating diaphragm. By connecting the control valve to the second air chamber and controlling the intake of external gas into the second air chamber, one end of the stretching body is slidably disposed in the second air chamber, and the other end is located outside the second air chamber. During the reciprocating vibration of the vibrating diaphragm, external gas can be drawn into the second air chamber, thereby increasing the air pressure in the second air chamber. This, in turn, pushes the other end of the stretching body to move away from the fixed base, thereby driving the outer shell of the display device to be pushed outward through the stretching body, achieving the effect of increasing the size of the display screen. When the control valve connects to the second air chamber and controls the gas discharge from the second air chamber, the air pressure in the second air chamber decreases. At this time, the reset drive structure can drive the other end of the stretching body to move towards the fixed seat. Then, the other end of the stretching body can pull the outer shell of the display device inward, thereby achieving the effect of shrinking the display screen. When the display screen in the display device is driven by the stretching device to extend and retract, it is not limited by the material, and its driving process is more stable, improving the reliability of the display screen during the extension and retraction process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A cross-sectional view of the tensioning body of the tensioning device according to Embodiment 1 of the present invention when it is in a tensioned state. Figure 2 This is a cross-sectional view of the tensioning body of the tensioning device according to Embodiment 1 of the present invention in the reset state. Figure 3 A cross-sectional view of the display device of Embodiment 2 of the present invention when the display screen is in a large-size state; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 A cross-sectional view of the display device of Embodiment 2 of the present invention when the display screen is in a small size state; Figure 6 for Figure 5 A magnified view of a section at point B in the middle; Figure 7A schematic flowchart illustrating an example of the stretching control method of Embodiment 3 provided by the present invention; Figure 8 This is a schematic flowchart illustrating another example of the stretching control method provided in Embodiment 3 of the present invention.

[0018] Explanation of icon numbers: 100. Tensioning device; 110. Fixing base; 111. First air chamber; 112. Second air chamber; 1121. First sub-chamber; 1122. Second sub-chamber; 1121a. Air inlet; 1122a. Pressure relief port; 120. Vibrating diaphragm; 130. Vibration drive component; 131. Sound generating unit; 132. Wireless charging transmitting coil; 133. Power switch; 140. Reset drive structure; 141. Reset elastic component; 142. First magnetic suction component; 143. Second magnetic suction component; 150. Control valve; 151. First one-way valve; 152. Pressure relief valve; 153. Second one-way valve; 160. Tensioning body; 161. Support plate; 162. Pull rod; 200. Display body layer; 210. Light-emitting layer; 220. Heat dissipation planarization layer; 300. Outer shell.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] As people's demand for displays increases, stretchable displays are gaining popularity. However, the stretchability of traditional displays relies mainly on flexible materials. When the display is large, the reliability of displays using flexible materials is low during the stretching process, and large-size display devices tend to generate more heat during use, which can have a significant impact on the display device.

[0024] Example 1: To improve the low reliability of traditional display screen stretching processes, this invention proposes a stretching device.

[0025] Please refer to the reference. Figures 1 to 6 In one example of the present invention, the stretching device 100 includes a fixed base 110, a vibrating diaphragm 120, a vibration drive 130, a stretching body 160, a reset drive structure 140, and a control valve 150. A cavity is formed within the fixed base 110. The vibrating diaphragm 120 is disposed within the cavity and divides the cavity into a first air chamber 111 and a second air chamber 112, which are isolated from each other. The vibration drive 130 is disposed on the fixed base 110 and can drive the vibration drive 130 into the first air chamber 111. 1. Emit vibration waves; one end of the stretching body 160 is slidably disposed in the second air chamber 112; the other end of the stretching body 160 is located outside the second air chamber 112 and can move closer to or away from the fixed seat 110 in the first direction; the reset drive structure 140 can drive the end of the stretching body 160 located outside the second air chamber 112 to move closer to the fixed seat 110; the control valve 150 is connected to the second air chamber 112 and can control the external gas to be drawn into the second air chamber 112 or control the gas in the second air chamber 112 to be discharged.

[0026] The mounting bracket 110 refers to a fixed component that can be attached to the backlight side of the display screen by means of screw connection, snap-fit ​​connection, or adhesive bonding. The cavity formed inside the mounting bracket 110 can be cylindrical, cuboid, or other irregular shapes.

[0027] The diaphragm 120 can be installed within the mounting base 110 by means of snap-fit, screw connection, welding, or bonding. When the diaphragm 120 is installed within the cavity, it can divide the cavity into at least two air chambers, defined as the first air chamber 111 and the second air chamber 112. In this invention, the diaphragm 120 isolates the first air chamber 111 and the second air chamber 112; that is, one side of the diaphragm 120 faces the first air chamber 111, and the other side faces the second air chamber 112. The volumes of the first air chamber 111 and the second air chamber 112 can be equal, or their volumes can be different.

[0028] The vibration drive 130 is mounted on the fixed base 110 and emits vibration waves into the first air chamber 111. Upon receiving these vibration waves, the diaphragm 120 reciprocates. The vibration drive 130 can be a mechanical device, an electromagnetic device, or an acoustic instrument, as long as it can drive the diaphragm 120 to vibrate. The vibration drive 130 can be located inside or outside the first air chamber 111, as long as the vibration waves emitted by the vibration drive 130 can be transmitted to the diaphragm 120. The frequency of the vibration waves emitted by the vibration drive 130 can be arbitrary. For example, to reduce noise, the frequency of the vibration waves can be selected to be below 20Hz or above 20000Hz. In this case, the diaphragm 120 can be selected with a membrane layer that can produce a resonance effect within the corresponding frequency range. Alternatively, the vibration drive 130 can be a speaker for a display device, in which case the resonant frequency of the diaphragm 120 can be a frequency audible to the human ear.

[0029] The stretching body 160 refers to a component that can slide relative to the fixed base 110. The stretching body 160 can be a plate, a rod, or other structure, as long as it can slide relative to the fixed base 110, thereby driving the display device housing 300 using the stretching device 100 to slide, thus achieving the effect of enlarging or shrinking the display screen. By sliding one end of the stretching body 160 to the second air chamber 112 and the other end outside the second air chamber 112, one end of the stretching body 160 can be moved by the air pressure of the second air chamber 112, causing the other end of the stretching body 160 to push away from the fixed base 110, thereby pushing the display device housing 300 and achieving the effect of enlarging the display screen.

[0030] The reset drive structure 140 is a structure used to drive the tension body 160 to move from a position away from the fixed base 110 to a position closer to the fixed base 110. The reset drive structure 140 can be at least one of the following: an elastic element, a cylinder, a linear motor, a magnetic suction device, etc.

[0031] Control valve 150 is connected to the second air chamber 112 and can control the intake of external gas into the second air chamber 112 or the discharge of gas from the second air chamber 112. In this invention, only one control valve 150 may be provided. This control valve 150 is a direction-switching valve. For example, the direction-switching valve can either allow external gas to be drawn into the second air chamber 112 or allow gas from the second air chamber 112 to be discharged from the second air chamber 112. Specifically, when the stretching body 160 needs to be pushed outward, the direction-switching valve can be controlled to introduce external gas into the second air chamber 112 to increase the display screen size. When the stretching body 160 needs to be moved towards the fixed base 110, the direction-switching valve can be controlled to reverse the direction to discharge the gas from the second air chamber 112 to the outside, thereby achieving a pressure relief effect. Combined with the reset drive structure 140 driving the stretching body 160 to reset, this achieves the effect of reducing the display screen size.

[0032] The control valve 150 in this invention is also provided in multiple ways, including an intake valve and a pressure relief valve 152. The second air chamber 112 is provided with multiple openings, and the intake valve and the pressure relief valve 152 are respectively located at different openings. The intake valve can be a one-way valve, which allows gas outside the second air chamber 112 to be introduced into the second air chamber 112. The pressure relief valve 152 can also be a one-way valve or a flow valve, which allows gas inside the second air chamber 112 to be discharged outside the second air chamber 112. Specifically, when the stretching body 160 needs to be pushed outward, the air inlet valve can be opened and the pressure relief valve 152 can be closed to introduce external gas into the second air chamber 112, thereby increasing the display screen size. When the stretching body 160 needs to be moved closer to the fixed base 110, only the pressure relief valve 152 can be opened while the vibration drive 130 and the air inlet valve are closed to exhaust the gas in the second air chamber 112 to the outside of the second air chamber 112, thereby achieving a pressure relief effect. Combined with the reset drive structure 140 driving the stretching body 160 to reset, this achieves the effect of reducing the display screen size. Alternatively, when it is necessary to move the stretching body 160 toward the fixed base 110, the pressure relief valve 152 can be opened, and the air inlet valve and the drive body can also be opened. The opening degree of the pressure relief valve 152 is greater than the opening degree of the air inlet valve, so that the air pressure in the second air chamber 112 decreases overall, so that the stretching body 160 can be moved toward the fixed base 110 by the reset drive structure 140, thereby achieving the effect of shrinking the display screen.

[0033] In the technical solution of the present invention, the vibrating diaphragm 120 of the stretching device 100 is disposed in the cavity of the fixed base 110, and the cavity is divided to form a first air chamber 111 and a second air chamber 112 that are isolated from each other. The vibration driving member 130 is disposed on the fixed base 110 and emits vibration waves to the first air chamber 111. Then, one side of the vibrating diaphragm 120 can receive the vibration waves emitted by the vibration driving member 130, and transmit the vibration waves to the second air chamber 112 through the other side of the vibrating diaphragm 120. By connecting the control valve 150 to the second air chamber 112 and controlling the intake of external gas into the second air chamber 112, and with one end of the stretching body 160 slidably disposed in the second air chamber 112 and the other end located outside the second air chamber 112, external gas can be drawn into the second air chamber 112 during the reciprocating vibration of the diaphragm 120, thereby increasing the air pressure in the second air chamber 112. This, in turn, pushes the other end of the stretching body 160 to move away from the fixed base 110, thereby driving the outer casing 300 of the display device to be pushed outward through the stretching body 160, thus achieving the effect of increasing the size of the display screen. When the control valve 150 connects to the second air chamber 112 and controls the gas discharge from the second air chamber 112, the air pressure in the second air chamber 112 decreases. At this time, the reset drive structure 140 can drive the other end of the stretching body 160 to move towards the fixed base 110. Then, the other end of the stretching body 160 can pull the outer shell 300 of the display device inward, thereby achieving the effect of shrinking the display screen. The display screen in the display device is not limited by the material when it is stretched and retracted by the stretching device 100, and its driving process is more stable, improving the reliability of the display screen during the stretching and retraction process.

[0034] Please refer to the reference. Figure 1 and Figure 2 In one example of the present invention, the cavity wall of the second air chamber 112 is provided with an air inlet 1121a and a pressure relief port 1122a; the control valve 150 includes a first check valve 151 and a pressure relief valve 152. The first check valve 151 is installed at the air inlet 1121a to introduce external gas into the second air chamber 112 in one direction; the pressure relief valve 152 is installed at the pressure relief port 1122a to discharge the gas in the second air chamber 112.

[0035] When it is necessary to increase the size of the display screen, the first one-way valve 151 of the air inlet 1121a can be opened and the pressure relief valve 152 at the pressure relief port 1122a can be closed. Thus, during the reciprocating vibration of the diaphragm 120, the first one-way valve 151 can only allow external gas to enter the second air chamber 112, while the gas in the second air chamber 112 cannot be discharged. Therefore, the air pressure in the second air chamber 112 increases, which in turn pushes the end of the stretching body 160 located outside the second air chamber 112 to move away from the fixed base 110. This achieves the effect of the stretching body 160 driving the outer casing 300 of the display device to move outward, thereby increasing the size of the display screen.

[0036] Based on the already enlarged display screen, when it is necessary to shrink the display area, the pressure relief valve 152 can be opened. This allows the gas in the second chamber 112 to escape, reducing the pressure within the chamber. The reset drive structure 140 then drives the end of the stretching body 160 located outside the second chamber 112 towards the fixed base 110, thus resetting the stretching body 160. This achieves the effect of moving the display device's outer casing 300 inward, thereby shrinking the display screen. It should be noted that when the pressure relief valve 152 is open, both the first one-way valve 151 and the vibration drive component 130 can be closed, meaning the gas in the second chamber 112 only escapes outward in one direction. Of course, when the pressure relief valve 152 is open, the first one-way valve 151 and the vibration drive 130 can also be in the open state, but the opening degree of the pressure relief valve 152 needs to be greater than the opening degree of the first one-way valve 151. At this time, the overall air pressure in the second air chamber 112 also decreases. The reset drive structure 140 can drive the end of the stretching body 160 located outside the second air chamber 112 to move towards the fixed seat 110, thereby resetting the stretching body 160, thus achieving the effect of driving the outer shell 300 of the display device to move inward and shrinking the display screen. In addition, when the pressure relief valve 152, the first one-way valve 151, and the vibration drive component 130 are all open, if the opening degree of the pressure relief valve 152 is the same as the opening degree of the first one-way valve 151, that is, the air intake in the second air chamber 112 is the same as the air exhaust in the second air chamber 112, the air pressure remains in a balanced state, and the stretching body 160 stops at the current position. Then, by adjusting the opening degree of the pressure relief valve 152 and the first one-way valve 151, the stretching body 160 can stop as needed, thereby achieving the effect of steplessly adjusting the size of the display screen.

[0037] Please refer to the reference. Figure 1 and Figure 2 In one example of the present invention, the second air chamber 112 includes a first sub-chamber 1121 and a second sub-chamber 1122. The sub-chamber is close to the vibrating diaphragm 120, and the air inlet 1121a is opened in the cavity wall of the first sub-chamber 1121. The second sub-chamber 1122 is located on the side of the first sub-chamber 1121 away from the vibrating diaphragm 120 and communicates with the first sub-chamber 1121. The pressure relief port 1122a is located in the cavity wall of the second sub-chamber 1122. The control valve 150 also includes a second one-way valve 153, which is located between the first sub-chamber 1121 and the second sub-chamber 1122, for unidirectionally introducing the gas in the first sub-chamber 1121 into the second sub-chamber 1122.

[0038] This configuration allows gas in the first sub-chamber 1121 to enter the second sub-chamber 1122 without allowing gas in the second sub-chamber 1122 to flow into the first sub-chamber 1121. This reduces the risk of gas flowing back into the first sub-chamber 1121 from the second sub-chamber 1122, thereby reducing the pressure fluctuations in the second sub-chamber 1122. This results in a stable push for the stretching body 160 to move, thus improving the reliability of the drive display screen extension process.

[0039] In addition, this configuration also allows the second check valve 153 to be closed when the pressure relief valve 152 is open during the resetting process of the tension body 160, thereby reducing the flow of gas from the second sub-chamber 1122 to the first sub-chamber 1121, improving the efficiency of gas discharge from the second sub-chamber 1122 through the pressure relief port 1122a, and thus improving the resetting efficiency of the tension body 160.

[0040] Please refer to the reference. Figure 1 and Figure 2 In one example of the present invention, the volume of the second sub-chamber 1122 is smaller than the volume of the first sub-chamber 1121.

[0041] By setting the volume of the second sub-chamber 1122 to be smaller than that of the first sub-chamber 1121, the efficiency of increasing the air pressure in the second sub-chamber 1122 to a preset value is improved when external gas is introduced into the second sub-chamber 1122, thereby improving the efficiency of the stretching body 160 pushing the outer shell 300 outward, and thus improving the efficiency of stretching the display screen.

[0042] Please refer to the reference. Figure 1 and Figure 2 In one example of the present invention, the reset drive structure 140 includes a reset elastic member 141 extending along a first direction, and one end of the reset elastic member 141 is connected to the fixing seat 110, and the other end is connected to the tension body 160.

[0043] The elastic element can be a spring or a sheet, etc.

[0044] By connecting one end of the reset elastic element 141 to the fixed base 110 and the other end to the tension body 160, the reset elastic element 141 can restore its deformation when the gas in the second air chamber 112 is discharged, thereby driving the tension body 160 to automatically reset. This reduces the need for manual reset of the tension body 160 or the need for other electric drive components to reset the tension body 160.

[0045] Please refer to the reference. Figure 1 and Figure 2In one example of the present invention, the reset drive structure 140 includes a first magnetic member 142 and a second magnetic member 143. The first magnetic member 142 and the second magnetic member 143 are respectively disposed on the fixed base 110 and the tension body 160, and the first magnetic member 142 and the second magnetic member 143 are disposed opposite to each other along a first direction.

[0046] With this configuration, the mutual attraction between the first magnetic 142 and the second magnetic 143 can drive the end of the stretching body 160 located outside the second air chamber 112 to move closer to the fixed seat 110, thereby achieving the effect of automatic reset of the stretching body 160. This reduces the need for manual reset of the stretching body 160 or the need for reset by other electric drive components.

[0047] It should be noted that the reset drive structure 140 may include only the reset elastic member 141, or only the first magnetic member 142 and the second magnetic member 143, or may include the reset elastic member 141, the first magnetic member 142 and the second magnetic member 143 simultaneously.

[0048] Please refer to the reference. Figure 1 and Figure 2 In one example of the present invention, the tension body 160 includes a support plate 161 and at least two pull rods 162. The support plate 161 is disposed outside the fixed base 110. One end of the pull rod 162 extends into the second air chamber 112 and can slide within the second air chamber 112. The other end of the pull rod 162 is connected to the support plate 161.

[0049] Specifically, there may be two, three, or more pull rods 162. When one end of the pull rod 162 extends into the second air chamber 112 and can slide within it, the second air chamber 112 may have a slide rail or groove adapted to the pull rod 162, and the pull rod 162 is disposed within the slide rail or groove. The second air chamber 112 has a through hole for the pull rod 162 to pass through. The end of the pull rod 162 located within the second air chamber 112 may have a limiting part, the outer dimension of which is larger than the size of the through hole, thereby reducing the risk of the pull rod 162 completely detaching from the second air chamber 112.

[0050] The support plate 161 is located outside the fixed base 110. At least two pull rods 162 are connected to the support plate 161 at one end outside the second air chamber 112. When the pull rods 162 are pushed by the air pressure in the second air chamber 112, they push the support plate 161 to move away from the fixed base 110. Thus, the display device housing 300 can be pushed outward by the support plate 161. The support plate 161 has a large contact area with the housing 300, thereby improving the stability of the display screen's extension and retraction.

[0051] Please refer to the reference. Figure 1and Figure 2 In one example of the present invention, the vibration drive 130 is a sound device.

[0052] By setting the vibration drive 130 as a sound device, its volume can be reduced, thereby decreasing the volume and weight of the stretching device 100. Furthermore, when the vibration drive 130 is a sound device, the speaker originally provided in the display device can be used, allowing the stretching device 100 to share components with other parts of the display device, thus reducing component costs and device size.

[0053] Please refer to the reference. Figure 1 and Figure 2 In one example of the present invention, the sound device includes a sound-emitting unit 131, a wireless charging transmitting coil 132, and a power switch 133. The sound-emitting side of the sound-emitting unit 131 faces into the first air chamber 111. A wireless charging receiving coil is provided inside the sound-emitting unit 131. The wireless charging transmitting coil 132 is magnetically connected to the wireless charging receiving coil. The power switch 133 is electrically connected to the wireless charging transmitting coil 132.

[0054] The sound-emitting unit 131 is a component that emits sound waves of a certain frequency. The sound-emitting unit 131 contains a wireless charging receiving coil, which receives nearby electromagnetic wave signals and converts them into current. This current is then further converted into a sound signal within the sound-emitting unit 131. The wireless charging transmitting coil 132 generates a magnetic field after being energized, thereby emitting electromagnetic wave signals. It is understood that, in order for the wireless charging receiving coil to receive the electromagnetic wave signals emitted by the wireless charging transmitting coil 132, the sound-emitting unit 131 can be placed near the wireless charging transmitting coil 132. The specific distance can be adjusted experimentally and will not be detailed here.

[0055] By configuring a power switch 133 and a wireless charging transmitting coil 132, with the power switch 133 electrically connected to the wireless charging transmitting coil 132, the wireless charging transmitting coil 132 generates a magnetic field when energized. By incorporating a wireless charging receiving coil within the generating unit, the magnetic field generated by the wireless charging transmitting coil 132 can be received, thereby inducing a current in the receiving coil. This induced current is then converted into sound waves by the sound-emitting unit 131 and emitted. This configuration reduces the complexity of the circuit design and minimizes the number of wiring steps.

[0056] Example 2: Please refer to the reference. Figures 3 to 6The present invention also proposes a display device, including a display main body layer 200, a stretching device 100, and a housing 300. The specific structure of the stretching device 100 is as described in the above embodiments. Since this display device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here. The display main body layer 200 has a light-emitting side and a backlight side arranged opposite to each other; the stretching device 100 is disposed on the backlight side of the display main body layer 200; both the display main body layer 200 and the stretching device 100 are installed inside the housing 300, and the side of the housing 300 closest to the stretching body 160 can move in a first direction.

[0057] The display body layer 200 includes a light-emitting layer 210 and a heat dissipation planarization layer 220, with the heat dissipation planarization layer 220 disposed on the side of the light-emitting layer 210 facing away from the light-emitting surface. Of course, in other examples, the display body layer 200 may also include a pixel layer, etc. When the stretching device 100 is disposed on the backlight side of the display body layer 200, it can be connected to the backlight side of the display body layer 200 by bonding, snapping, or screwing the fixing seat 110 of the stretching device 100 with the stretching device 100. It is understood that the housing 300 of the display device typically has a mounting cavity, and both the display body layer 200 and the stretching device 100 are installed within the housing 300, that is, both the display body layer 200 and the stretching device 100 are installed within the mounting cavity. The outer shell 300 is slidably connected to the display body layer 200 on the side near the stretching body 160 and can slide in the first direction. That is, the outer shell 300 can be divided into a first shell and a second shell arranged opposite each other along the first direction. The first shell and the second shell together form a mounting cavity for mounting the display body and the stretching device 100. The first shell and the second shell are slidably connected. The first shell is located on the side of the fixing base 110 away from the stretching body 160; the second shell is located on the side of the fixing base 110 near the stretching body 160 and slides along the first direction. Alternatively, the outer shell 300 is made of a stretchable and deformable elastic material that can be stretched or contracted, thereby enabling one end of the outer shell 300 to move along the first direction.

[0058] By placing the stretching device 100 on the backlight side of the display body layer 200, the risk of the stretching device 100 obstructing the display screen can be reduced. Furthermore, by placing the display body layer 200 and the stretching device 100 within the housing 300, and allowing the side of the housing 300 closest to the stretching body 160 to move in the first direction, the end of the housing 300 closest to the stretching body 160 can expand outward under the drive of the stretching body 160, thereby increasing the size of the display screen. Alternatively, after the stretching body 160 is reset, the side of the housing 300 closest to the stretching body 160 can be driven to move inward, thereby reducing the size of the display screen.

[0059] Please refer to the reference. Figure 4 and Figure 6 In one example of the present invention, a plurality of tensioning devices 100 are provided, and the tensioning body 160 of one of every two adjacent tensioning devices 100 is fixedly connected to the fixing seat 110 of the other.

[0060] With this configuration, any number of stretching devices 100 can be driven to move outward, thereby flexibly changing the outward extension size of the outer shell 300 and thus flexibly changing the size of the display screen.

[0061] Example 3: like Figure 7 As shown, the present invention also proposes a tension control method for a tensioning device 100. The specific structure of the tensioning device 100 in this tension control method is as described in the above embodiments. Since this tension control method adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. The tension control method of the present invention includes: S10: Obtain the action command of the tensioning device 100, wherein the action command includes a tensioning state command and a reset state command; S20: The received action command is a stretching state command; S30: Control the vibration drive 130 to open, so that the diaphragm 120 reciprocates; S40: Control valve 150 is opened, and control valve 150 controls the external gas to be drawn into the second gas chamber 112, and controls the gas in the second gas chamber 112 to not be discharged.

[0062] The operating commands for the tensioning device 100 include a tensioning state command and a reset state command. The tensioning state command refers to the state in which the end of the tensioning body 160 located outside the second air chamber 112 moves away from the fixed base 110. The reset state command refers to the state in which the end of the tensioning body 160 located outside the second air chamber 112 moves closer to the fixed base 110.

[0063] The vibration drive 130 can be a mechanical vibration device, an electromagnetic vibration device, or a sound vibration device, and the resonant frequency of the diaphragm 120 is similar to the frequency of the vibration wave emitted by the vibration drive 130.

[0064] There may be only one control valve 150. This control valve 150 is a directional control valve. For example, this directional control valve can either allow external gas to be drawn into the second air chamber 112, or it can be switched to allow gas in the second air chamber 112 to be discharged out of the second air chamber 112. Specifically, when it is necessary to push the stretching body 160 outward, the directional control valve can be controlled to introduce external gas into the second air chamber 112 to increase the size of the display screen. When it is necessary to move the stretching body 160 towards the fixed base 110, the directional control valve can be controlled to switch directions to discharge the gas in the second air chamber 112 out of the second air chamber 112, thereby achieving a pressure relief effect. Combined with the reset drive structure 140 driving the stretching body 160 to reset, this achieves the effect of reducing the size of the display screen. Of course, in other examples, there may be multiple control valves 150, including an inlet valve and a pressure relief valve 152. The second air chamber 112 has multiple openings, and the inlet valve and pressure relief valve 152 are located at different openings. The air intake valve can be a one-way valve, allowing gas from outside the second air chamber 112 to enter the second air chamber 112. The pressure relief valve 152 can also be a one-way valve or a flow valve, allowing gas from inside the second air chamber 112 to exit outside the second air chamber 112. Specifically, when the stretching body 160 needs to be pushed outward, the air intake valve can be opened and the pressure relief valve 152 can be closed to allow external gas to enter the second air chamber 112, thereby increasing the size of the display screen. When the stretching body 160 needs to be moved towards the fixed base 110, only the pressure relief valve 152 can be opened while the vibration drive 130 and the air intake valve are closed, allowing gas from inside the second air chamber 112 to exit outside the second air chamber 112, thereby achieving a pressure relief effect. Combined with the reset drive structure 140 driving the stretching body 160 to reset, this achieves the effect of reducing the size of the display screen. Alternatively, when it is necessary to move the stretching body 160 toward the fixed base 110, the pressure relief valve 152 can be opened, and the air inlet valve and the drive body can also be opened. The opening degree of the pressure relief valve 152 is greater than the opening degree of the air inlet valve, so that the air pressure in the second air chamber 112 decreases overall, so that the stretching body 160 can be moved toward the fixed base 110 by the reset drive structure 140, thereby achieving the effect of shrinking the display screen.

[0065] When the present invention receives a stretching command, it controls the vibration drive 130 to open and the control valve 150 to open. The control valve 150 controls the external gas to be drawn into the second air chamber 112, and the gas in the second air chamber 112 is not discharged. This causes the air pressure in the second air chamber 112 to gradually increase. When the air pressure in the second air chamber 112 increases to the point that it can overcome the resistance of the stretching body 160 moving in the first direction, one end of the stretching body 160 located in the second air chamber 112 moves outward under the push of the air pressure in the second air chamber 112, while the other end of the stretching body 160 located outside the second air chamber 112 moves away from the fixed base 110. This makes the distance between the end of the stretching body 160 located outside the fixed base 110 and the fixed base 110 increasingly farther. As a result, when the stretching body 160 is connected to one end of the housing 300 of the display device, one end of the housing 300 can expand outward under the drive of the stretching body 160, thereby increasing the size of the display screen.

[0066] like Figure 8 As shown, in one example of the present invention, the cavity wall of the second air chamber 112 is provided with an air inlet 1121a and a pressure relief port 1122a; the control valve 150 includes a first one-way valve 151 and a pressure relief valve 152. The first one-way valve 151 is installed at the air inlet 1121a to unidirectionally introduce external gas into the second air chamber 112; the pressure relief valve 152 is installed at the pressure relief port 1122a to discharge the gas in the second air chamber 112. Step S10: After obtaining the action command of the tensioning device 100, the following steps are also included: S50: The action command obtained is a reset state command; S60: Controls the pressure relief valve 152 to open; S70: Check whether the stretched body 160 has reached the preset position; S80: When the tension body 160 is detected to have reached the preset position, the opening of the pressure relief valve 152 is reduced, and the opening of the pressure relief valve 152 is the same as the opening of the first check valve 151, or the vibration drive 130, the pressure relief valve 152 and the first check valve 151 are all closed.

[0067] When the action command is a reset command, the pressure relief valve 152 is opened, which reduces the air pressure in the second air chamber 112. Under the drive of the reset drive, the end of the stretching body 160 located outside the fixed base 110 is pulled towards the fixed base 110, thereby driving the outer shell 300 connected to it to move inward, thus achieving the effect of reducing the size of the display screen.

[0068] After detecting that the tension body 160 has reached the preset position, the opening of the pressure relief valve 152 is reduced, and the opening of the pressure relief valve 152 is the same as the opening of the first one-way valve 151. Alternatively, the vibration drive 130, the pressure relief valve 152 and the first one-way valve 151 are all closed. This allows the tension body 160 to stay at any position within its stroke range, achieving the effect of stepless adjustment of the display screen size.

[0069] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A tensioning device, characterized in that, include: A fixing seat, wherein a cavity is formed inside the fixing seat; A vibrating diaphragm is disposed within the cavity and divides the cavity into a first air chamber and a second air chamber, wherein the first air chamber and the second air chamber are isolated from each other. A vibration drive component is disposed on the fixed base and is capable of emitting vibration waves into the first air chamber; A stretching body, one end of which is slidably disposed in the second air chamber; the other end of which is located outside the second air chamber and can move closer to or further away from the fixed base along a first direction; A reset drive structure is provided, which can drive one end of the stretching body located outside the second air chamber to approach the fixed seat. as well as A control valve is connected to the second air chamber and can control the intake of external gas into the second air chamber or control the exhaust of gas from the second air chamber.

2. The tensioning device as described in claim 1, characterized in that, The second air chamber has an air inlet and a pressure relief port on its cavity wall; the control valve includes: A first one-way valve, installed at the air inlet, is used to unidirectionally introduce outside gas into the second air chamber; and A pressure relief valve is installed at the pressure relief port to discharge gas from the second air chamber.

3. The tensioning device as described in claim 2, characterized in that, The second air chamber includes: The first sub-chamber is located close to the vibrating diaphragm, and the air inlet is located on the cavity wall of the first sub-chamber. The second sub-chamber is located on the side of the first sub-chamber away from the vibrating diaphragm and is connected to the first sub-chamber. The pressure relief port is located on the cavity wall of the second sub-chamber. The control valve also includes a second one-way valve, which is located between the first sub-chamber and the second sub-chamber to unidirectionally introduce gas from the first sub-chamber into the second sub-chamber.

4. The tensioning device as described in claim 3, characterized in that, The volume of the second sub-chamber is smaller than the volume of the first sub-chamber.

5. The tensioning device according to any one of claims 1 to 4, characterized in that, The reset drive structure includes a reset elastic member extending along the first direction, and one end of the reset elastic member is connected to the fixed base, and the other end is connected to the tension body. And / or, the reset drive structure includes a first magnetic suction member and a second magnetic suction member, the first magnetic suction member and the second magnetic suction member are respectively disposed on the fixed base and the stretching body, and the first magnetic suction member and the second magnetic suction member are arranged opposite to each other along the first direction.

6. The tensioning device according to any one of claims 1 to 4, characterized in that, The stretching body includes: A support plate, wherein the support plate is disposed outside the fixed base; and At least two pull rods, one end of which extends into the second air chamber and can slide within the second air chamber, and the other end of which is connected to the support plate.

7. The tensioning device according to any one of claims 1 to 4, characterized in that, The vibration driving component is a sound device, and the sound device includes: A sound-emitting unit, the sound-emitting side of which faces the first air chamber; the sound-emitting unit is equipped with a wireless charging receiving coil. A wireless charging transmitting coil, wherein the wireless charging transmitting coil is magnetically connected to the wireless charging receiving coil; and A power switch, which is electrically connected to the wireless charging transmitting coil.

8. A display device, characterized in that, include: The display main layer has a light-emitting side and a backlight side that are disposed opposite to each other; A stretching device, wherein the stretching device is as described in any one of claims 1 to 7, and the stretching device is disposed on the backlight side of the display body layer; as well as The outer casing, the display body layer and the stretching device are both installed inside the outer casing, and the side of the outer casing near the stretching body can move in the first direction.

9. A tension control method based on the tensioning device according to any one of claims 1 to 7, characterized in that, include: Obtain the action command of the stretching device, wherein the action command includes a stretching state command and a reset state command; The obtained action command is a stretching state command; The vibration drive is activated to cause the diaphragm to reciprocate. The control valve is opened, and the control valve controls the outside gas to be drawn into the second gas chamber, while controlling the gas in the second gas chamber not to be discharged.

10. The stretching control method as described in claim 9, characterized in that, The second air chamber has an air inlet and a pressure relief port on its cavity wall; the control valve includes a first check valve and a pressure relief valve. The first check valve is installed at the air inlet to allow external gas to be introduced into the second air chamber in one direction; the pressure relief valve is installed at the pressure relief port to discharge the gas from the second air chamber. After the step of obtaining the action command of the tensioning device, the method further includes: The obtained action command is a reset state command; Control the opening of the pressure relief valve; Detect whether the stretching body has reached the preset position; When the tensioning body is detected to have reached a preset position, the opening of the pressure relief valve is reduced, and the opening of the pressure relief valve is the same as the opening of the first one-way valve, or the vibration drive, the pressure relief valve and the first one-way valve are all closed.

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