Dual display screen support frame and folding electronic device thereof

Abstract

The utility model provides a kind of double display screen support frame and its folding electronic equipment, wherein, double display screen support frame includes stand, base, first supporting member and second supporting member;The lower end of the stand is connected with the base;The first supporting member is slidably arranged on the stand along the height direction of stand;The upper end of the second supporting member is relatively rotatably connected with the lower end of the first supporting member;The lower end of the second supporting member is relatively swingable and slidably connected along the front-back direction of the base;When the first supporting member slides up and down along the height direction of stand, it drives the second supporting member to slide along the base, and in turn changes the included angle between the first supporting member and the second supporting member.The utility model is simple in structure, can realize the quick switching of double-screen multi-working angle, and improves user experience.

Description

Technical Field

[0001] This utility model relates to the field of display screen support technology, and in particular to a dual display screen support frame and its folding electronic device. Background Technology

[0002] Currently, with the development of technology, more and more dual-display or foldable screens are being used. In practice, dual-display and foldable screens exhibit various working states. For example, two displays may be arranged at an angle of 90°-135°, with one screen acting as an input device and the other as a monitor, or both screens may be unfolded onto the same plane to form a unified large screen. However, current support devices cannot meet the demands of the complex structure of dual-display systems or the need for rapid switching between multiple working angles. Utility Model Content

[0003] The purpose of this utility model is to provide a dual-display support frame and its folding electronic device to solve at least one of the above-mentioned technical problems existing in the prior art.

[0004] To solve the above-mentioned technical problems, this utility model provides a dual-display screen support frame, comprising: a column, a base, a first support member, and a second support member; The lower end of the column is connected to the base; The first support member is slidably mounted on the column along the height direction of the column; The upper end of the second support member and the lower end of the first support member are rotatably connected relative to each other; The lower end of the second support member can rotate relative to the base and can slide along the front-back direction of the base; When the first support slides up and down along the height of the column, it causes the second support to slide along the base, thereby changing the angle between the first support and the second support.

[0005] The first and second supports are used to mount the first and second display units respectively; the first and second display units are independent display screens; or, the first and second display units are the upper and lower parts of the same folding screen. The first and second supports are rotatably connected relative to each other by a pivot or hinge.

[0006] Furthermore, it also includes a slide block, which is slidably disposed on the base in the front-rear direction, and the lower end of the second support member is pivotally or hinged to the slide block.

[0007] The slide block can be in the form of a slider, and preferably includes two slide blocks that are symmetrical about left and right.

[0008] Furthermore, the slide is also a plate-shaped base, which is slidably mounted on the base via a linear guide structure such as a slide groove or slide rail. The second support is pivotally or hinged to the base.

[0009] Furthermore, a positioning mechanism is provided between the slide and the base for locking the slide; the positioning mechanism also includes a retractable positioning pin on the slide; one or more limiting holes are provided on the base on the moving path of the top of the positioning pin; after the positioning pin is inserted into the limiting hole, the slide is locked, thereby maintaining the set angle state between the first support and the second support.

[0010] Furthermore, the base is provided with a rack structure along the front-rear direction, and the grooves between adjacent teeth on the rack structure are the limiting holes adapted to the positioning pin.

[0011] Compared to the multiple limit holes spaced apart, the toothed grooves in the rack structure are more densely arranged, which can almost achieve locking of the slide at any position in its stroke, as well as locking of any angle in the swing range of the first support and the second support.

[0012] Furthermore, the base is provided with a guide groove along the front-to-back direction, and the slide is provided with a slider or rolling element adapted to the guide groove. The slider or rolling element is slidably inserted into the guide groove for linear guidance of the slide.

[0013] Furthermore, the two guide grooves are symmetrically arranged on the left and right sides of the base; at least one of the guide grooves has the rack structure at its bottom (i.e., on the bottom surface facing the opening).

[0014] Furthermore, the slide block is provided with a mounting hole for the positioning pin to pass through, and a cam structure is provided at the edge of the mounting hole. The cam structure includes an arcuate inclined surface arranged along the circumference of the positioning pin. A knob is fixedly provided at the outer end of the positioning pin. The knob is a sleeve, and an annular working surface adapted to the arcuate inclined surface is provided inside the sleeve. By rotating the knob, the annular working surface slides along the arcuate inclined surface, thereby forcing the positioning pin to move axially.

[0015] Preferably, a compression spring is provided in the mounting hole, with both ends of the compression spring connected to the side wall of the mounting hole and the positioning pin, respectively, tending to force the positioning pin to move towards the slide, thereby maintaining the contact state between the annular working surface and the arc-shaped inclined surface.

[0016] Preferably, the compression spring is fitted onto the locating pin, with its two ends abutting against the boss on the side wall of the mounting hole and the ring of the locating pin, respectively.

[0017] Preferably, an angle limiting structure is provided between the mounting hole and the knob to limit the swing angle of the positioning pin and the knob; the angle limiting structure is preferably a limiting protrusion on the arc inclined surface of the cam structure, and an axial boss adapted to the limiting protrusion is provided on the annular working surface of the knob. After the axial boss abuts against the limiting protrusion, it restricts the knob from continuing to rotate.

[0018] Furthermore, a handle is provided on the top of the first support member for lifting the first support member; and / or, a handle is provided on one or both sides of the second support member for pushing and pulling the second support member.

[0019] Furthermore, when the slide block slides forward (towards the user when the display screen is facing the user) to the front end of its travel, the second support is horizontally positioned; When the slide block slides backward (towards the user when the display screen is facing the user) to the rear end of its travel, the second support member and the first support member are in the same plane.

[0020] Furthermore, it also includes a connecting seat, which is slidably mounted on the column, and the first support member is mounted on the connecting seat.

[0021] Furthermore, it also includes a lifting component, wherein a movable cavity is provided in the column along the height direction, and a strip-shaped opening is provided in the movable cavity on one side of the connecting seat along the height. The inner end of the lifting component is slidably disposed in the movable cavity, and the outer end of the lifting component extends out from the strip-shaped opening and connects to the connecting seat.

[0022] Furthermore, the inner end of the lifting component is slidably disposed within the movable cavity via a slide rail structure or a rolling component.

[0023] Furthermore, the column includes: a main body and a front cover; the main body is a U-shaped frame formed by stamping and bending a metal plate; the front cover covers the front opening of the U-shaped frame, thereby enclosing the movable cavity; the front cover is provided with the strip-shaped opening.

[0024] Furthermore, it also includes guide bars, two guide bars are symmetrically fixed on both sides of the U-shaped frame, and the guide bars are provided with grooves along the length direction; The inner ends of the lifting component are provided with rolling elements that are adapted to slide along the groove.

[0025] The guide bar can be an independent component that is machined by casting, stamping, turning, grinding, or other mechanical processes.

[0026] Preferably, the rolling element is a bearing. The rolling element can also be a roller, etc.

[0027] Preferably, it also includes a shell that encloses the main body on the outside. The lifting component includes a slider and a connecting arm. One end of the connecting arm is connected to the slider, and the other end extends out of the strip-shaped opening and connects to the connecting seat.

[0028] Furthermore, it also includes a constant force spring, which is disposed in the movable cavity and connected at both ends to the lifting member and the column, respectively, and tends to force the lifting member to move upward, thereby providing a supporting force for the first support member and the second support member.

[0029] The constant force spring includes a winding end and a telescopic end, and the winding end is preferably connected to the lifting component through a spring seat.

[0030] Preferably, a damping structure such as a friction plate is provided between the lifting component and the side wall of the slide.

[0031] The first and second support components can be frame or plate structures. The uprights can be fixedly erected on the base.

[0032] Preferably, a pivot seat is fixedly provided on the base, and the lower end of the column is pivotally connected to the pivot seat; The pivot seat is arc-shaped and has a groove on one side of the second support member to provide space for the second support member to move during the rotation of the column.

[0033] Furthermore, when the slide block slides forward to the front end of its travel and the second support member is horizontally positioned, the first and second support members can be folded up by rotating the column. The pivot seat protrudes upward from the top surface of the base, providing storage space for both screens during the folding process.

[0034] Furthermore, the lower end of the column is pivotally connected to the shaft hole of the pivot seat via a pivot shaft; an angle limiting structure is provided between the column and the pivot seat to limit the swing amplitude of the column and / or temporarily limit the column to a set swing angle.

[0035] The angle limiting structure takes various forms. For example, the pivot seat has limiting platforms at both ends of the column's swing stroke to limit the swing amplitude of the column; or, the column or pivot seat has pin holes with a return spring and a positioning pin inside. The pivot seat or column has positioning holes in the circumferential direction of the pivot shaft and shaft hole. The return spring tends to force the positioning pin to extend out of the pin hole and then insert into the positioning hole to temporarily lock the column at a certain swing angle. After the positioning pin is forced to overcome the return spring force and exit the positioning hole, the column can continue to swing.

[0036] More preferably, a damping structure, such as a friction plate, is provided between the column and the pivot seat to increase the damping force between the two, improve the user's feel, and help the column to hover at a certain swing angle.

[0037] Preferably, it also includes a torsion spring, which is mounted on the pivot shaft and connected at both ends to the column and the pivot seat, respectively, to force the column to be raised and kept upright.

[0038] The second aspect of this application discloses a foldable electronic device employing the aforementioned dual-display support frame.

[0039] By adopting the above technical solution, this utility model has the following beneficial effects: This utility model provides a dual-display support frame and its foldable electronic device, which has a simple structure and can realize rapid switching between dual screens and multiple working angles, thus improving the user experience. Attached Figure Description

[0040] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 A perspective view of the dual-display screen support frame provided in an embodiment of this utility model; Figure 2 for Figure 1 The side view of the dual-display support frame shown from a first-person perspective; Figure 3 for Figure 1 An exploded view of the dual-display support frame shown; Figure 4 for Figure 2 Enlarged view of point A in the middle; Figure 5 An exploded view of the column and base provided for an embodiment of this utility model; Figure 6 An exploded view of the column provided in an embodiment of this utility model; Figure 7 An exploded view of the main body and guide strip in the column provided for an embodiment; Figure 8 A perspective view of the main body of the column provided for an embodiment of this utility model; Figure 9 A perspective view of the guide strip in the column provided for an embodiment of this utility model; Figure 10 An exploded view of the lifting component provided in an embodiment of this utility model; Figure 11 This is an exploded view of the base and pivot seat in the embodiment; Figure 12 An exploded view of one embodiment of the slide; Figure 13 An exploded view of another embodiment of the slide; Figure 14 This is a 3D view of the knob.

[0042] Figure label: 10-Base; 11-Guide groove; 12-Rack and pinion structure; 13-Pivot seat; 14-Torsion spring; 20-Column; 21-Main body; 22-Front cover; 22a-Strip opening; 23-Guide strip; 23a-Slide groove; 25-Housing shell; 31-First support; 32-Hinge; 33-First handle; 35-Second support; 36-Second handle; 40-Slide seat; 41-Positioning pin; 42-First rolling element; 43-Knob; 43a-Annular working surface; 44-Circular arc slope; 45-Shaft; 46-Seat body; 50-Connecting seat; 51-Lifting element; 51a-Slider; 51b-Connecting arm; 52-Second rolling element; 53-Constant force spring; 54-Spring seat. Detailed Implementation

[0043] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] The present invention will be further explained below with reference to specific embodiments.

[0047] like Figure 1-14 As shown, this embodiment provides a dual-display screen support frame, including: a column 20, a base 10, a first support member 31, and a second support member 35; the column 20 is erected on the base 10; the first support member 31 is slidably disposed on the column 20 along the height direction of the column 20; the upper end of the second support member 35 is rotatably connected to the lower end of the first support member 31; the lower end of the second support member 35 is swayable relative to the base 10 and is slidably connected along the front-back direction of the base 10; when the first support member 31 slides up and down along the height direction of the column 20, it drives the second support member 35 to slide along the base 10, thereby changing the included angle between the first support member 31 and the second support member 35.

[0048] The first support member 31 and the second support member 35 are used to respectively mount the first display unit (not shown) and the second display unit (not shown); the first display unit and the second display unit are independent display screens; or, the first display unit and the second display unit are the upper and lower parts of the same folding screen. The first support member 31 and the second support member 35 are rotatably connected relative to each other by a hinge member 32.

[0049] This embodiment also includes a slide 40, which is slidably disposed on the base 10 in the front-back direction, and the lower end of the second support member 35 is pivotally or hinged to the slide 40.

[0050] The slide block 40 can be in the form of a slider, preferably comprising two symmetrically arranged slide blocks 40. Furthermore, the slide block 40 can also be a plate-shaped base, which is slidably mounted on the base 10 via a linear guide structure such as a groove or rail. The second support member 35 is pivotally or hinged to the base.

[0051] See Figure 11-14 As shown, in this embodiment, the slide 40 is a triangular seat structure, which is pivotally connected to the upper seat 46 via the shaft 45, and the second support 35 is fixedly connected to the seat 46.

[0052] Furthermore, a positioning mechanism is provided between the slide 40 and the base 10 for locking the slide 40; the positioning mechanism also includes a retractable positioning pin 41 on the slide 40; one or more limiting holes are provided on the base 10 on the moving path of the top of the positioning pin 41; after the positioning pin 41 is inserted into the limiting hole, the slide 40 is locked, thereby maintaining the set angle state between the first support member 31 and the second support member 35.

[0053] See Figure 2-4As shown, a rack structure 12 is provided on the base 10 along the front-back direction, and the tooth groove between adjacent teeth on the rack structure 12 is the limiting hole adapted to the positioning pin 41.

[0054] Compared to the multiple limiting holes spaced apart, the tooth grooves in the rack structure 12 are arranged more densely, which can almost achieve locking of the slide 40 at any position in its stroke, as well as locking of the first support 31 and the second support 35 at any angle in their swing amplitude.

[0055] The base 10 is provided with a guide groove 11 along the front-to-back direction. The slide 40 is provided with a first rolling element 42 that is adapted to the guide groove 11. The first rolling element 42 is slidably inserted into the guide groove 11 for linear guidance of the slide 40.

[0056] Furthermore, the two guide grooves 11 are symmetrically arranged on the left and right sides of the base 10; at least one of the guide grooves 11 has a rack structure 12 on its bottom (i.e., the bottom surface facing the opening). Preferably, the rack structure 12 is a separately manufactured rack body, which is fixed to the bottom of the guide groove 11 by bonding or welding.

[0057] See Figure 13 As shown, the slide block 40 is provided with a mounting hole for the positioning pin 41 to pass through. A cam structure is provided at the edge of the mounting hole, and the cam structure includes an arcuate inclined surface 44 arranged circumferentially along the positioning pin 41; a knob 43 is fixedly provided at the outer end of the positioning pin 41; see also Figure 14 As shown, the knob 43 is a sleeve, and the sleeve has an annular working surface 43a that is adapted to the arc inclined surface 44. By rotating the knob 43, the annular working surface 43a slides along the arc inclined surface 44, thereby forcing the positioning pin 41 to move axially.

[0058] Preferably, a compression spring (not shown) is provided in the mounting hole, with both ends of the compression spring connected to the side wall of the mounting hole and the positioning pin 41 respectively, tending to force the positioning pin 41 to move towards the slide block 40, thereby maintaining the contact state between the annular working surface 43a and the arc inclined surface 44.

[0059] Preferably, the compression spring is fitted onto the locating pin 41, with its two ends abutting against the boss on the side wall of the mounting hole and the ring platform of the locating pin 41, respectively.

[0060] Preferably, an angle limiting structure is provided between the mounting hole and the knob 43 to limit the swing angle of the positioning pin 41 and the knob 43; see also Figure 14As shown, the angle limiting structure is preferably a limiting protrusion on the arc inclined surface 44 of the cam structure. The annular working surface 43a of the knob 43 is provided with an axial boss 43b that matches the limiting protrusion. After the axial boss 43b abuts against the limiting protrusion, it restricts the knob 43 from continuing to rotate.

[0061] See Figure 1-3 As shown, the top of the first support member 31 is provided with a first handle 33 for lifting the first support member 31; the second support member 35 is provided with a second handle 36 on one or both sides for pushing and pulling the second support member 35.

[0062] Preferably, when the slide 40 slides forward (towards the user when the display screen is facing the user) to the front end of its travel, the second support 35 is horizontally positioned; when the slide 40 slides backward (towards the user when the display screen is facing the user) to the rear end of its travel, the second support 35 and the first support 31 are in the same plane.

[0063] See Figure 5 As shown, this embodiment preferably also includes a connecting seat 50, which is slidably and vertically mounted on the column 20, and the first support member 31 is mounted on the connecting seat 50. This embodiment also includes a lifting member 51, in which a movable cavity is provided along the height direction inside the column 20, and a strip-shaped opening 22a is provided along the height on one side of the connecting seat 50. The inner end of the lifting member 51 is slidably mounted in the movable cavity, and the outer end of the lifting member 51 extends out from the strip-shaped opening 22a and connects to the connecting seat 50.

[0064] Furthermore, the inner end of the lifting member 51 is slidably disposed in the movable cavity via a slide rail structure or a rolling member.

[0065] See Figure 6-8 As shown, the column 20 includes: a main body 21 and a front cover 22; the main body 21 is a U-shaped frame formed by stamping and bending a metal plate; the front cover 22 covers the front opening of the U-shaped frame, thereby enclosing the movable cavity; the front cover 22 is provided with the strip opening 22a.

[0066] Furthermore, it also includes guide bars 23, two guide bars 23 are symmetrically fixed on both sides of the U-shaped frame, and the guide bars 23 are provided with grooves 23a along their length; the inner ends of the lifting member 51 are provided with second rolling members 52 that are slidably adapted to the grooves 23a. Among them, the guide bars 23 can be independent components that are machined by casting, stamping or turning and grinding.

[0067] Preferably, the aforementioned rolling element is a bearing. The rolling element can also be a roller, etc. In this embodiment, the bearing is rotatably mounted on the slider, which is mounted on the slide block 40 or the lifting member 51. The slider has grooves for accommodating the bearing, and the outer ring of the bearing extends out of the grooves from both sides. Thus, this guide structure combines the advantages of both a slider and a rolling element.

[0068] Preferably, it also includes a shell 25 that encloses the main body 21 on the outside. Among them, see Figure 10 As shown, the lifting component 51 includes a slider 51a and a connecting arm 51b. One end of the connecting arm 51b is connected to the slider 51a, and the other end extends out of the strip opening 22a and is connected to the connecting seat 50.

[0069] Furthermore, it also includes a constant force spring 53, which is disposed in the movable cavity, with its two ends connected to the lifting member 51 and the column 20 respectively, and tends to force the lifting member 51 to move upward, thereby providing a supporting force for the first support member 31 and the second support member 35.

[0070] The constant force spring 53 includes a winding end and a telescopic end, and the winding end is preferably connected to the lifting member 51 via a spring seat 54. Preferably, a damping structure such as a friction plate is provided between the lifting member 51 and the side wall of the slide groove.

[0071] The first support member 31 and the second support member 35 can be a frame structure or a plate structure.

[0072] The column 20 can be fixedly erected on the base 10. Preferably, a pivot seat 13 is fixedly provided on the base 10, and the lower end of the column 20 is pivotally connected to the pivot seat 13; the pivot seat 13 is arc-shaped and has a groove on one side of the second support member 35 to provide movement space for the second support member 35 during the rotation of the column 20.

[0073] Furthermore, when the slide block 40 slides forward to the front end of its travel and the second support member 35 is horizontally positioned, the first support member 31 and the second support member 35 can be folded up by rotating the column 20. The pivot seat 13 protrudes upward from the top surface of the base 10, providing storage space for both screens during the folding process.

[0074] Furthermore, the lower end of the column 20 is pivotally connected to the shaft hole of the pivot seat 13 via a pivot shaft; an angle limiting structure (not shown) is provided between the column 20 and the pivot seat 13 to limit the swing amplitude of the column 20 and / or temporarily limit the column 20 to a set swing angle.

[0075] The angle limiting structure takes various forms. For example, the pivot seat 13 is provided with limiting platforms at both ends of the swing stroke of the column 20 to limit the swing amplitude of the column 20; or, the column 20 or the pivot seat 13 is provided with pin holes, and a return spring and a positioning pin 41 are provided in the pin holes. The pivot seat 13 or the column 20 is provided with positioning holes in the circumferential direction of the pivot shaft and the shaft hole. The return spring tends to force the positioning pin 41 to extend out of the pin hole and then insert into the positioning hole to temporarily lock the column 20 at a certain swing angle. After the positioning pin 41 is forced to overcome the force of the return spring and exit the positioning hole, the column 20 can continue to swing.

[0076] More preferably, a damping structure, such as a friction plate, is provided between the column 20 and the pivot seat 13 to increase the damping force between the two, improve the user's feel, and help the column 20 to hover at a certain swing angle.

[0077] Preferably, see Figure 11 As shown, this embodiment also includes a torsion spring 14, which is mounted on the pivot shaft and connected at both ends to the column 20 and the pivot seat 13, respectively, tending to force the column 20 to lift and remain upright.

[0078] The second aspect of this application discloses a foldable electronic device employing the aforementioned dual-display support frame.

[0079] This utility model provides a dual-display support frame and its foldable electronic device, which has a simple structure and can realize rapid switching between dual screens and multiple working angles, thus improving the user experience.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dual-display screen support frame, characterized in that, include: Column, base, first support and second support; The lower end of the column is connected to the base; The first support member is slidably mounted on the column along the height direction of the column; The upper end of the second support member and the lower end of the first support member are rotatably connected relative to each other; The lower end of the second support member can rotate relative to the base and can slide along the front-back direction of the base; When the first support slides up and down along the height of the column, it causes the second support to slide along the base, thereby changing the angle between the first support and the second support.

2. The dual-display screen support frame according to claim 1, characterized in that, It also includes a slide block, which is slidably disposed on the base in the front-rear direction, and the lower end of the second support member is pivotally or hinged to the slide block.

3. The dual-display screen support frame according to claim 2, characterized in that, A positioning mechanism is provided between the slide and the base for locking the slide; the positioning mechanism also includes a retractable positioning pin on the slide; one or more limiting holes are provided on the base on the moving path of the top of the positioning pin; after the positioning pin is inserted into the limiting hole, the slide is locked, thereby maintaining the set angle state between the first support and the second support.

4. The dual-display screen support frame according to claim 3, characterized in that, The base is provided with a rack structure along the front-to-back direction, and the grooves between adjacent teeth on the rack structure are the limiting holes adapted to the positioning pins.

5. The dual-display screen support frame according to claim 4, characterized in that, The base is provided with a guide groove along the front-to-back direction, and the slide is provided with a slider or rolling element adapted to the guide groove. The slider or rolling element is slidably inserted into the guide groove for linear guidance of the slide.

6. The dual-display screen support frame according to claim 5, characterized in that, The two guide grooves are symmetrically arranged on the left and right sides of the base; at least one of the guide grooves has a rack structure at its bottom.

7. The dual-display screen support frame according to claim 3, characterized in that, The slide block is provided with a mounting hole for the positioning pin to pass through. A cam structure is provided at the edge of the mounting hole. The cam structure includes an arc-shaped inclined surface arranged along the circumference of the positioning pin. A knob is fixedly provided at the outer end of the positioning pin. The knob is a sleeve. An annular working surface adapted to the arc-shaped inclined surface is provided inside the sleeve. By rotating the knob, the annular working surface slides along the arc-shaped inclined surface, thereby forcing the positioning pin to move axially.

8. The dual-display screen support frame according to claim 7, characterized in that, A compression spring is installed inside the mounting hole. The two ends of the compression spring are connected to the side wall of the mounting hole and the positioning pin, respectively, which tends to force the positioning pin to move towards the slide, thereby maintaining the contact state between the annular working surface and the arc-shaped inclined surface.

9. The dual-display screen support frame according to claim 8, characterized in that, The compression spring is fitted onto the locating pin, with its two ends abutting against the boss on the side wall of the mounting hole and the ring of the locating pin, respectively.

10. The dual-display screen support frame according to claim 7, characterized in that, An angle limiting structure is provided between the mounting hole and the knob to limit the swing angle of the positioning pin and the knob. The angle limiting structure is preferably a limiting protrusion on the arc inclined surface of the cam structure. An axial boss that matches the limiting protrusion is provided on the annular working surface of the knob. After the axial boss abuts against the limiting protrusion, it restricts the knob from continuing to rotate.

11. The dual-display screen support frame according to claim 1, characterized in that, The first support member is provided with a handle at the top for lifting the first support member; and / or, the second support member is provided with handles on one or both sides for pushing and pulling the second support member.

12. The dual-display screen support frame according to claim 1, characterized in that, It also includes a connecting seat, which is slidably mounted on the column, and the first support member is mounted on the connecting seat.

13. The dual-display screen support frame according to claim 12, characterized in that, It also includes a lifting component. The column has a movable cavity along the height direction. The movable cavity has a strip-shaped opening along the height on one side of the connecting seat. The inner end of the lifting component is slidably disposed in the movable cavity. The outer end of the lifting component extends out from the strip-shaped opening and connects to the connecting seat.

14. The dual-display screen support frame according to claim 13, characterized in that, The inner end of the lifting component is slidably disposed within the movable cavity via a slide rail structure or a rolling component.

15. The dual-display screen support frame according to claim 13, characterized in that, The column includes: a main body and a front cover; the main body is a U-shaped frame formed by stamping and bending a metal plate; the front cover covers the front opening of the U-shaped frame, thereby enclosing the movable cavity; the front cover is provided with the strip-shaped opening.

16. The dual-display screen support frame according to claim 15, characterized in that, It also includes guide bars, two guide bars are symmetrically fixed on both sides of the U-shaped frame, and the guide bars are provided with grooves along the length direction; The inner ends of the lifting component are provided with rolling elements that are adapted to slide along the groove.

17. The dual-display screen support frame according to claim 5 or 16, characterized in that, The rolling element is a bearing.

18. The dual-display screen support frame according to claim 15, characterized in that, It also includes a shell that surrounds the main body.

19. The dual-display screen support frame according to claim 13, characterized in that, It also includes a constant force spring, which is disposed in the movable cavity and connected at both ends to the lifting member and the column, respectively, and tends to force the lifting member to move upward, thereby providing a supporting force for the first support member and the second support member.

20. The dual-display screen support frame according to claim 13, characterized in that, A damping structure is provided between the lifting component and the side wall of the slide.

21. The dual-display screen support frame according to claim 1, characterized in that, A pivot seat is fixedly installed on the base, and the lower end of the column is pivotally connected to the pivot seat; The pivot seat is arc-shaped and has a groove on one side of the second support member to provide space for the second support member to move during the rotation of the column.

22. The dual-display screen support frame according to claim 21, characterized in that, The lower end of the column is pivotally connected to the shaft hole of the pivot seat via a pivot shaft; an angle limiting structure is provided between the column and the pivot seat to limit the swing amplitude of the column and / or temporarily limit the column to a set swing angle.

23. The dual-display screen support frame according to claim 22, characterized in that, A damping structure is provided between the column and the pivot seat.

24. The dual-display screen support frame according to claim 22, characterized in that, It also includes a torsion spring, which is mounted on the pivot shaft and connected at both ends to the column and the pivot seat, respectively, tending to force the column to lift and remain upright.

25. A foldable electronic device employing the dual-display support frame as described in any one of claims 1-24.

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