Knob-type button structure, circuit control structure, device and control method

Abstract

The present invention provides a knob-type key structure, circuit control structure, device, and control method. The knob-type key structure includes an encoder, a rotary dial, and a key. The rotary ring on the upper portion of the encoder is fixed to the rotary dial and rotates therewith. The key is installed in a mounting hole in the middle of the encoder and the rotary dial. One end of the key is a pressing portion, and the other end is a contact portion that can move to a trigger position along the centerline of the mounting hole under external force acting on the pressing portion. The contact portion extends through the mounting hole. The key is provided with an elastic return member for returning the contact portion from the trigger position to an initial position. The elastic return member is elastically deformed along the centerline of the mounting hole. The present invention, through the structure of the key and the rotary dial, facilitates the simultaneous realization of key control functions and knob control functions through a single key structure, thereby simplifying the circuit structure design and reducing the size of the device.

Description

Technical Field

[0001] The present invention relates to mechanical technology, in particular to a knob-type key structure, a circuit control structure, a device and a control method. Background Art

[0002] With the continuous development and popularization of digital control technology, more and more devices are controlled by devices such as microcontrollers and DSPs. Parameter adjustment is a key component of digital control technology. Encoders are increasingly replacing potentiometers as a key parameter adjustment component due to their numerous advantages, including small size, light weight, wide variety, comprehensive functionality, high frequency response, high resolution, low torque, low energy consumption, stable performance, reliability, and long service life. To simplify parameter adjustment and simplify the human-machine interface, many encoders feature pushbutton switches, allowing both parameter switching and left / right rotation to adjust parameter values. However, currently, encoder knobs do not feature pushbuttons. If the encoder's pushbutton switch function is required, sufficient space must be left between the knob and the panel during installation to operate the encoder's pushbutton switch. This, however, exposes the encoder's rotating shaft to potential damage from impact. Summary of the Invention

[0003] The purpose of the present invention is to solve at least one of the above-mentioned technical defects, and in particular to provide a knob-type key structure that integrates button control function and knob control function, so that the knob-type key structure can perform press selection operation while rotating selection.

[0004] The knob-type button structure of the present invention includes an encoder, a rotary dial and a button. The rotating ring on the upper part of the encoder is fixed to the rotary dial and rotates therewith. The button is installed in the mounting hole in the middle of the encoder and the rotary dial. One end of the button is a pressing portion, and the other end is a touch-pressing portion that can move to a trigger position along the direction of the center line of the mounting hole under the external force acting on the pressing portion, and the touch-pressing portion passes through the mounting hole. The button is provided with an elastic return member for returning the touch-pressing portion from the trigger position to the initial position, and the elastic deformation direction of the elastic return member is along the direction of the center line of the mounting hole.

[0005] Preferably, the button is provided with a connecting piece that passes through the encoder on a side facing the encoder, and a buckle is extended from the end of the connecting piece to fix the knob-type button structure on the circuit board.

[0006] Preferably, the button is provided with a return member positioning portion on the side facing the encoder, the connecting member and the return member positioning portion are integrally formed, and a curved elastic arm serving as the elastic return member extends from the edge of the return member positioning portion.

[0007] Preferably, the touch-pressing portion is fixed to the center of the pressing portion, the curved elastic arms are multiple curved elastic arms arranged outside the touch-pressing portion, and the ends of the multiple curved elastic arms are symmetrical about the center of the touch-pressing portion.

[0008] The present invention also proposes a circuit control structure, including a circuit board and at least one of the above-mentioned knob-type button structures; the knob-type button structure is fixed on the circuit board, and the end of the elastic return member is abutted against the circuit board; a touch switch is provided on the circuit board, and when the touch-pressing part moves between the initial position and the trigger position, the switch signal of the touch switch is triggered.

[0009] Preferably, a snap groove that cooperates with the snap is provided on the circuit board; the radius of the pressing portion is larger than the radius of the mounting hole, the pressing portion is located on the side of the mounting hole away from the circuit board, and the knob-type button structure is fixed to the circuit board through the snap and the snap groove.

[0010] Preferably, an LED lamp is provided on the circuit board; the pressing portion is a light-transmitting pressing portion, a hollow light-transmitting space is provided in the middle of the pressing portion, and the light of the LED lamp is emitted through the hollow light-transmitting space and the light-transmitting pressing portion.

[0011] Preferably, the LED lamp is electrically signal-connected to the touch switch, and the switching signal of the touch switch is associated with the switching signal of the LED lamp.

[0012] The present invention also provides a device comprising at least one circuit control structure.

[0013] The present invention also provides a method for selecting audio and video data, which receives a selection signal through the circuit control structure, and includes the following steps:

[0014] Acquiring audio and video data, wherein the audio and video data includes a time axis;

[0015] Obtaining a first confirmation signal input through the key, and taking a time point on the time axis corresponding to the first confirmation signal as a starting point;

[0016] Acquire a rotation signal inputted through the knob, and select a time interval according to the rotation signal and the starting point;

[0017] A second confirmation signal input through the key is obtained, a time point on the time axis corresponding to the second confirmation signal is used as the end point of the time interval, and the selected audio and video data is determined according to the rotation signal, the start point and the end point.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The knob-type button structure of the present invention is conducive to realizing the button control function and the knob control function through the structure of the button and the rotary dial, thereby simplifying the circuit structure design, reducing the volume of the button structure to save the area of the device control panel, and further reducing the volume of the device.

[0020] 2. The circuit control structure of the present invention can receive pressing information through the touch switch and receive rotation signals through the encoder, and the structure is simple and practical; through the cooperation of the snap groove and the snap, the purpose of tool-free assembly of the circuit control structure can be achieved; through the LED light and the translucent pressing part, the purpose of determining the working state of the key structure by whether the key is translucent can be achieved, the structure is simple and the cost is low.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the following description, will become apparent from the following description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 This is a schematic diagram of the external three-dimensional structure of an embodiment of the knob-type button structure of the present invention;

[0024] Figure 2 This is a schematic perspective view of an exploded structure of an embodiment of a knob-type button structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the exploded structure projection of an embodiment of the knob-type button structure of the present invention;

[0026] Figure 4 A schematic cross-sectional view of an embodiment of a circuit control structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of a key embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the projection structure of a key embodiment of the present invention;

[0029] Figure 7 Schematic diagram of a flow chart of an embodiment of a method for selecting audio and video data of the present invention.

[0030] Description of labels:

[0031] Encoder 1, rotating ring 11, rotating dial 2, button 3, contact and pressure part 31, elastic return member 32, buckle 33, limiting step 34, clamping foot 35, return member positioning part 36, circuit board 4, touch switch 41, LED light 42. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0033] It will be understood by those skilled in the art that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the present specification refers to the presence of the features, elements and / or components, but does not exclude the presence or addition of one or more other features, elements, components and / or groups thereof. It should be understood that when we say that an element is "connected" to another element, it can be directly connected to the other element, or there may be intermediate elements. The term "and / or" used herein includes all or any units and all combinations of one or more associated listed items.

[0034] The terms "upper, lower," "inside, outside," and "left, right" in the present invention are relative concepts. For example, "upper" and "lower" are two relative directions, and do not represent the directions in actual application. The direction of the knob-type key structure of the present invention in actual application can be changed according to specific circumstances; for example, Figure 4 The knob-type button structure in the embodiment can also be rotated 90° clockwise or counterclockwise without affecting the function of the knob-type button structure of the present invention.

[0035] The present invention proposes a knob-type button structure, combined with Figure 1-Figure 3 The illustrated embodiment includes an encoder 1, a rotary dial 2, and a button 3. A rotating ring 11 on top of the encoder 1 is fixed to the rotary dial 2 and rotates with it, allowing the user to adjust the electrical signal output by the encoder 1 by rotating the rotary dial 2, thereby achieving a knob-like adjustment function. A mounting hole for the button 3 is provided in the middle of the encoder 1 and the rotary dial 2, allowing the button 3 to move between the encoder 1 and the rotary dial 2, achieving a push-to-adjust function. The button 3, located in the mounting hole, has a pressing portion at one end and a contact portion 31 at the other end. The contact portion 31 extends through the mounting hole and, under the influence of an external force acting on the pressing portion, can move along the centerline of the mounting hole to a trigger position, thereby changing the on / off signal of the trigger switch 41 in a contact or non-contact manner.

[0036] The button 3 is further provided with an elastic restoring member 32 , the elastic deformation direction of the elastic restoring member 32 is along the center line of the mounting hole, so that the contact and pressure portion 31 is restored from the trigger position to the initial position without external force.

[0037] like Figure 4 As shown, when the knob-type key structure is installed on a circuit board 4 with a touch switch 41, the user rotates the rotary dial 2, which can drive the rotating ring 11 of the encoder 1 to rotate, thereby inputting a rotation control signal and outputting the corresponding rotation control signal through the output pin of the encoder 1; when the user presses the pressing portion of the key 3, the touch-pressing portion 31 can be moved from the initial position to the trigger position, so that the touch switch 41 sends a touch signal and outputs the corresponding press control signal through the touch switch 41. Therefore, the present invention, through the structure of the key 3 and the rotary dial 2, is conducive to enabling a knob-type key structure on the circuit board 4 to simultaneously realize the key control function and the knob control function, thereby simplifying the circuit structure design, reducing the volume of the knob-type key structure to save the area of the device control panel, and further reducing the volume of the device.

[0038] In the present invention, the touch-pressing portion 31 triggers the touch switch 41 to send a touch signal in the following manner: Figure 4 The contact-type triggering mechanism shown in FIG. For example, when the pressure portion 31 contacts the touch switch 41, the touch switch 41 generates a corresponding high or low level to output a touch signal. The pressure portion 31 can also trigger the touch switch 41 to generate a touch signal in a non-contact manner, for example, through electromagnetic induction between the pressure portion 31 and the touch switch 41, or by the pressure portion 31 blocking the signal from the touch switch 41. Both contact-type and non-contact signal triggering mechanisms can be implemented using existing technologies and will not be further described here.

[0039] In another embodiment of the present invention, the button 3 is provided with a connector that passes through the encoder 1 on the side facing the encoder 1. The end of the connector is provided with a clip 33 for fixing the knob-type button structure to the circuit board 4. The clip 33 allows the button structure to be fixed to the circuit board 4 without tools, simplifying the assembly process and facilitating disassembly.

[0040] The cross-section of the connector can be circular or polygonal, and the buckle 33 is folded from the inside or outside of the connector so that after the connector is inserted into the encoder 1 or circuit board 4, it buckles onto the encoder 1 or circuit board 4 to achieve a fixed function. The inside is the side close to the centerline of the key 3, and the outside is the side away from the centerline of the key 3. The end of the connector can also have several gaps in a direction parallel to the centerline of the connector to form several buckle sections separated by these gaps, with a buckle 33 provided at the end of each buckle section. The gaps can deform when the key 3 is installed, facilitating the insertion of the key 3 into the encoder 1 or circuit board 4 and securing the connection.

[0041] like Figure 2-Figure 6In the illustrated embodiment, the button 3 can be integrally formed and has a plurality of legs 35 extending away from the pressing portion as the connecting member. Each leg 35 is provided with a buckle 33 at its distal end. When securing the button 3 to the circuit board 4, the distal end of each leg 35 can be slightly deformed to facilitate insertion of the button 3 into the circuit board 4 and securement via the buckle 33. The buckle 33 can protrude either away from or toward the centerline of the button 3.

[0042] In another embodiment of the present invention, a return element positioning portion 36 is provided on the side of the key 3 facing the encoder 1. The connecting member and return element positioning portion 36 are integrally formed, and a curved elastic arm, serving as the elastic return element 32, extends from the edge of the return element positioning portion 36. The integral formation of the connecting member and return element positioning portion 36 in this embodiment simplifies the manufacturing process of the key 3 and makes the key 3 less susceptible to damage. Furthermore, the curved elastic arm, extending from the edge of the return element positioning portion 36 and also being an integrally formed structure, is unlikely to fall off or shift, simplifying the assembly process and difficulty of the key 3, improving the stability of the key 3, and reducing the probability of failure.

[0043] Of course, in some embodiments, the elastic return member 32 can be a structure that is removable from the button 3. For example, a return spring can be provided between the button 3 and the rotary dial 2 as the elastic return member 32 to achieve the purpose of returning the contact portion 31 from the trigger position to the initial position. The number of elastic return members 32 can be one or more. For example, in some embodiments, the elastic return member 32 is a single elastic return member disposed on the outside of the contact portion 31, or a single elastic return member disposed on the inside of the contact portion 31. In other embodiments, the elastic return member 32 can also be a plurality of elastic return members evenly distributed around the outside of the contact portion 31. The outer side is the side away from the centerline of the contact portion 31, and the inner side is the side close to the centerline of the contact portion 31.

[0044] like Figure 5 and Figure 6 As shown, in one embodiment of the present invention, the touch-pressing portion 31 is fixed to the center of the pressing portion, and the curved elastic arm is disposed outside the touch-pressing portion 31. The touch-pressing portion 31 in the knob-type key structure of this embodiment is relatively small, which helps reduce the size of the key 3. However, the force-bearing area on the circuit board 4 corresponding to the curved elastic arm is relatively large. When the user presses the pressing portion, the corresponding force-bearing area on the circuit board 4 is relatively large, thereby preventing local deformation caused by excessive pressure on a local area of the circuit board 4, or damage caused by repeated presses. The key 3 in this embodiment has a stable force structure and a long service life.

[0045] The curved elastic arm can be a single curved elastic arm that surrounds the contact portion 31, with an inner diameter greater than the cross-sectional diameter of the contact portion 31, so as to be sleeved outside the contact portion 31. The curved elastic arm can also be a plurality of curved elastic arms that are rotationally symmetrically arranged about the center line of the contact portion 31. Therefore, the present invention further proposes the following embodiments:

[0046] There are multiple curved elastic arms, and the ends of the multiple curved elastic arms are symmetrical about the center of the contact portion 31. In this embodiment, multiple curved elastic arms are included. Compared to a single curved elastic arm, each curved elastic arm can be smaller in size. Therefore, the curved elastic arm is more easily deformed under force, which helps reduce the controlled pressing force of the key 3. This not only improves the pressing sensitivity of the key 3, but also reduces the probability of damage to the key 3 due to excessive pressing force. Furthermore, the ends of the multiple curved elastic arms in this embodiment are symmetrical about the center of the contact portion 31. When the ends abut against the circuit board 4, they not only provide sufficient elastic restoring force but also ensure a balanced elastic restoring force, ensuring balanced and stable movement of the key 3 relative to the circuit board 4.

[0047] When the key 3 is integrally formed with the clamping foot 35 and the elastic return member 32, the clamping foot 35 and the elastic return member 32 can be spaced around the outer side of the contact and pressure portion 31 and evenly distributed; that is, each clamping foot 35 is clamped between two elastic return members 32, and each elastic return member 32 is clamped between two clamping feet 35, and the spacing between each clamping foot 35 is even, and the spacing between each elastic return member 32 is even, so that the force on the entire key 3 is even.

[0048] Based on the above knob-type key structure, the present invention also proposes a circuit control structure, which includes a circuit board 4 and the knob-type key structure; the knob-type key structure is fixed on the circuit board 4, and the end of the elastic return member 32 is against the circuit board 4; combined with Figures 1-4 In the illustrated embodiment, a touch switch 41 is further provided on the circuit board 4. When the pressure portion 31 moves between the initial position and the trigger position, a switch signal of the touch switch 41 is triggered. When the pressure portion 31 is pressed at the initial position, it moves to the trigger position. The trigger position can be a position where the pressure portion 31 contacts the touch switch 41 to generate a switch signal, or a position where the pressure portion 31 can generate a switch signal without contact.

[0049] In the circuit control structure of the present invention, the button 3 can be positioned by the encoder 1 or the rotary dial 2 to prevent the elastic return member 32 from falling out of the mounting hole when it returns to the initial position under the action of the elastic return force. For example, a positioning step or positioning groove can be provided on the rotary dial 2, the diameter of which is smaller than the size of the pressing portion of the button 3, and the pressing portion of the button 3 is mounted on the side of the slot or positioning groove close to the circuit board 4. When the button 3 is subjected to the elastic return force and rebounds away from the circuit board 4, it will be blocked by the positioning step or positioning groove and prevented from falling out. The encoder 1 or the rotary dial 2 can be fixed to the circuit board 4 using fixing components such as screws and a snap-fit structure, or can be positioned in conjunction with a positioning step or other structure.

[0050] In one embodiment of the present invention, the circuit board 4 is provided with a snap groove that mates with the snap 33. The radius of the pressing portion is greater than the radius of the mounting hole, and the pressing portion is located on the side of the mounting hole away from the circuit board 4. The knob-type button structure is secured to the circuit board 4 via the snap 33 and the snap groove. When the snap 33 is inserted into the snap groove, the encoder 1 or the rotary dial 2 is clamped between the pressing portion and the snap 33, thereby securing the knob-type button structure to the circuit board 4. In this embodiment, the snap 33 and the snap groove mate, allowing the knob-type button structure to be installed on the circuit board 4 without tools, making installation and removal simple and quick.

[0051] The buckle 33 can be located at the end of the illustrated foot 35 or at the end of the connector. When the knob-type button structure is fixed to the circuit board 4 in other ways, a buckle slot can also be retained on the circuit board 4 for backup.

[0052] In another embodiment of the present invention, an LED light 42 is further provided on the circuit board 4; Figure 2-Figure 4 As shown, the pressing portion is a light-transmitting pressing portion, and a hollow light-transmitting space is provided in the middle of the touch-pressing portion 31. The light of the LED lamp 42 is emitted through the hollow light-transmitting space and the light-transmitting pressing portion, so that the key 3 has a lighting effect. For example, the key 3 can be integrally formed with transparent acrylic to form the light-transmitting pressing portion. There can be one or more LED lamps 42. When there are multiple LED lamps 42, their light colors or lighting modes can be the same or different to form different lighting effects; their arrangement can also be determined according to the specific usage scenario. The LED lamp 42 can be directly fixed on the circuit board 4, or it can be fixed on the circuit board 4 through a circuit assembly together with components such as the touch switch 41.

[0053] In another embodiment of the present invention, the LED light 42 is electrically connected to the touch switch 41, and the on / off signal of the touch switch 41 is associated with the on / off signal of the LED light 42, so as to achieve the purpose of indicating the status of the touch switch 41 through the LED light 42. For example, when the touch switch is in the on state, the LED light 42 is in the on state; when the touch switch is in the off state, the LED light 42 is also in the off state. When the LED light 42 and the touch switch 41 are electrically connected through a single-chip microcomputer, it can realize a richer LED display mode, for example, it can be displayed in combination with the rotation angle of the rotary dial 2. Of course, in some embodiments, the LED light 42 can also be used to indicate the power-on status of the knob-type button structure of the present invention.

[0054] Combine Figures 1-6 As shown, in a preferred embodiment of the present invention, the knob-type button structure includes an encoder 1, a rotary dial 2, a button 3, a circuit board 4, a touch switch 41, and an LED light 42. The encoder 1 is fixed to the circuit board 4, and a rotating ring 11 is located above the encoder 1, which can rotate around the central axis of the encoder 1. The rotary dial 2 is fixedly engaged with the rotating ring 11 and can rotate circumferentially with the rotating ring 11. The center of the rotary dial 2 and the center of the encoder 1 form a hollow receiving space, and the button 3 is installed in this receiving space.

[0055] Combine Figure 4 In the illustrated position, the upper end of the button 3 serves as the pressing portion. A pair of symmetrically positioned feet 35 extending to the circuit board 4 are located at the lower end. A latch 33 is attached to one end of the feet 35, securing the button 3 to the circuit board 4. A stopper 34 is also provided at the lower end of the button 3 to limit the pressing stroke, allowing the button 3 to move up and down relative to the circuit board 4. A raised contact portion 31 is located at the bottom of the button 3. A touch switch 41 is located on the circuit board 4 opposite the contact portion 31. When the pressing portion of the button 3 is pressed, the button 3 moves downward, and the contact portion 31 lightly contacts the touch switch 41, turning it on or off. LED lights 42 are located on either side of the touch switch 41 to illuminate the on / off status of the button 3. Two curved elastic arms are symmetrically positioned between the pair of feet 35, connected to the edge of the button. The elastic abutment portions of the two curved elastic arms abut against the circuit board 4, providing a spring force for the button 3 to rebound. At the same time, the two curved elastic arms are symmetrically arranged, and the end of each elastic supporting portion is located on the central symmetry axis of the key 3, so that the curved elastic arm can provide sufficient elastic restoring force while ensuring the balance of the elastic restoring force, so that the movement of the key 3 relative to the circuit board 4 is balanced and stable.

[0056] The knob-type key structure provided by the present invention integrates the functions of a key and a knob, allowing the key structure to be rotated for selection and pressed for selection. Combined with the provision of an LED light 42, this facilitates user identification of successful selections, providing clear functional indication. Furthermore, the present invention utilizes multiple curved elastic arms to provide sufficient elastic restoring force for the key 3 while ensuring a balanced elastic restoring force. This ensures balanced and stable movement of the key 3 relative to the circuit board 4, reducing key failure rates and lowering maintenance costs.

[0057] In one use case of the present invention, rotating the rotary dial 2 locates and selects the option corresponding to the rotary button. To confirm a selection, the user presses button 3. When button 3 is pressed, the pressure portion 31 lightly touches the touch switch 41, illuminating the LED 42 and providing feedback indicating successful confirmation. A further example would be when the user needs to select a video for editing. Rotating the rotary dial 2 selects the timeline, and continuously pressing button 3 selects a time interval, thereby selecting the videos within that time interval. The user can then perform editing operations by combining other operation buttons.

[0058] Based on this application scenario, the present invention also proposes an embodiment of a method for selecting audio and video data. The selection method receives a selection signal through any of the aforementioned circuit control structures, such as Figure 7 As shown, it specifically includes the following steps:

[0059] Step S10: Acquire audio and video data, wherein the audio and video data includes a time axis;

[0060] Step S20: Acquire a first confirmation signal inputted through the key, and take the time point on the time axis corresponding to the first confirmation signal as the starting point;

[0061] Step S30: obtaining a rotation signal inputted through the knob, and selecting a time interval according to the rotation signal and the starting point;

[0062] Step S40: Obtain a second confirmation signal input through the key, use the time point on the time axis corresponding to the second confirmation signal as the end point of the time interval, and determine the selected audio and video data according to the rotation signal, the start point and the end point.

[0063] The audio and video data selection method of the present invention can quickly select audio and video data within a certain time interval only through a circuit control structure with a knob-type button structure, thereby improving the efficiency of users in selecting audio and video data. It is particularly suitable for terminal devices without a mouse and keyboard, such as self-service jukebox terminals.

[0064] Therefore, the present invention also proposes a device, which includes at least one of the above-mentioned circuit control structures to realize the human-computer interaction function of the device.

[0065] The above descriptions are only partial embodiments of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A knob-type button structure, characterized in that: The invention comprises an encoder (1), a rotary dial (2) and a button (3), wherein a rotating ring (11) on the upper part of the encoder (1) is fixed to the rotary dial (2) and rotates therewith, and the button (3) is installed in the mounting holes in the middle of the encoder (1) and the rotary dial (2); one end of the button (3) is a pressing portion, and the other end is a touch-pressing portion (31) which can move to a trigger position along the direction of the center line of the mounting hole under the external force acting on the pressing portion, and the touch-pressing portion (31) passes through the mounting hole; an elastic return member (32) is provided on the button (3) for returning the touch-pressing portion (31) from the trigger position to the initial position, and the elastic deformation direction of the elastic return member (32) is along the direction of the center line of the mounting hole; the button (3) is limited by the encoder (1) or the rotary dial (2), so that when the elastic return member 32 returns to the initial position under the action of the elastic return force, it is restricted from coming out of the mounting hole; The button (3) is provided with a return member positioning portion (36) on a side facing the encoder (1), and a curved elastic arm serving as the elastic return member (32) extends from an edge of the return member positioning portion (36); The touch-pressing portion (31) is fixed to the center of the pressing portion, and the curved elastic arms are a plurality of curved elastic arms arranged outside the touch-pressing portion (31), with the ends of the plurality of curved elastic arms being symmetrical about the center of the touch-pressing portion (31).

2. The knob-type button structure according to claim 1, characterized in that: The button (3) is provided with a connecting piece that passes through the encoder (1) on a side facing the encoder (1), and a buckle (33) for fixing the knob-type button structure to the circuit board (4) extends from the end of the connecting piece.

3. The knob-type button structure according to claim 2, characterized in that: The connecting piece and the return piece positioning portion (36) are integrally formed.

4. A circuit control structure, characterized in that: The invention comprises a circuit board (4) and at least one knob-type key structure according to any one of claims 1 to 3; the knob-type key structure is fixed on the circuit board (4), and the end of the elastic return member (32) is abutted against the circuit board (4); a touch switch (41) is provided on the circuit board (4), and when the touch-pressing portion (31) moves between the initial position and the trigger position, a switch signal of the touch switch (41) is triggered.

5. The circuit control structure according to claim 4, characterized in that: A snap groove cooperating with the snap (33) is provided on the circuit board (4); the radius of the pressing portion is larger than the radius of the mounting hole, the pressing portion is located on a side of the mounting hole away from the circuit board (4), and the knob-type button structure is fixed to the circuit board (4) via the snap (33) and the snap groove.

6. The circuit control structure according to claim 4, characterized in that: An LED lamp (42) is provided on the circuit board (4); the pressing portion is a light-transmitting pressing portion, a hollow light-transmitting space is provided in the middle of the touch-pressing portion (31), and light from the LED lamp (42) is emitted through the hollow light-transmitting space and the light-transmitting pressing portion.

7. The circuit control structure according to claim 6, characterized in that: The LED lamp (42) is electrically signal-connected to the touch switch (41), and the switch signal of the touch switch (41) is associated with the switch signal of the LED lamp (42).

8. A device, characterized in that The method comprises at least one circuit control structure according to any one of claims 4 to 7.

9. A method for selecting audio and video data, characterized in that: The method receives a selection signal through the circuit control structure according to any one of claims 4 to 7, comprising the following steps: Acquiring audio and video data, wherein the audio and video data includes a time axis; Obtaining a first confirmation signal input through the key, and taking a time point on the time axis corresponding to the first confirmation signal as a starting point; Obtaining a rotation signal inputted through a rotary dial, and selecting a time interval according to the rotation signal and the starting point; A second confirmation signal input through the key is obtained, a time point on the time axis corresponding to the second confirmation signal is used as the end point of the time interval, and the selected audio and video data is determined according to the rotation signal, the start point and the end point.

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