Transverse and vertical screen switching device for liquid crystal touch all-in-one machine

Abstract

The invention relates to the technical field of liquid crystal screen matching, and particularly discloses a horizontal and vertical screen switching device for a liquid crystal touch all-in-one machine, the horizontal and vertical screen switching device comprises a base, a stand column and a rotary switching mechanism, the rotary switching mechanism comprises a ring sleeve, a first rotary column and a second rotary column are rotationally arranged in the ring sleeve, and a columnar groove is formed in the rear end of the first rotary column; the second rotating column and the columnar groove move in the axial direction and are limited in the circumferential direction, a spring is connected between the second rotating column and the columnar groove, an arc guide groove is formed in the inner wall of the ring sleeve, clamping grooves are formed in the two ends of the arc guide groove, and a guide piece acting with the arc guide groove is arranged on the outer circle face of the second rotating column; a pull rope is arranged in a vertical channel in the stand column, the upper end of the pull rope is connected with the second rotating column, a pedal part is rotationally connected into the base, and the lower end of the pull rope is connected with the pedal part. The transverse and vertical screen switching device is simple and ingenious in structural design, and has a good use effect when being used for transverse and vertical screen switching of the liquid crystal touch all-in-one machine.

Description

Technical Field

[0001] The invention relates to the technical field of liquid crystal screen matching, and specifically discloses a horizontal and vertical screen switching device for a liquid crystal touch-control integrated machine. Background Art

[0002] The LCD touch all-in-one machine is an intelligent device that integrates human-computer interaction, LCD display and other functions. Its main components include a base, a bracket and an LCD touch screen. During the use of the LCD touch all-in-one machine, it is necessary to switch the screen horizontally or vertically according to its different usage methods. Therefore, a corresponding rotating connection mechanism is often required between the LCD touch screen and the bracket to achieve the above functions.

[0003] The invention patent with application number 202211597625.1 discloses a horizontal and vertical screen bracket, including a base, a column fixed on the top of the base, a back plate installed on the front side wall of the column, a center hole opened in the middle of the back plate, and a square hole opened on the outer wall of the column corresponding to the center hole. There are five square holes, and the other four square holes are evenly distributed in a ring shape based on the square hole in the middle. The surface of the back plate is centered on the center hole. There are arc holes on all four sides, and the back plate and the column are connected by a locking mechanism. When the horizontal and vertical screen bracket disclosed in the invention is used for the rotation adjustment of the LCD touch screen, the LCD touch screen needs to be rotated 90° and then fixed by screwing the anti-loosening nut, which makes the horizontal and vertical switching operation steps of the LCD touch screen cumbersome.

[0004] In addition, there are other related patent technologies that use a bearing shaft and a locking mechanism to achieve the horizontal and vertical switching of the LCD touch screen. For example, the invention patent with application number 202311500513.4 discloses a horizontal and vertical screen rotation device for a display device. Although the device is convenient and quick to adjust the rotation switching of the LCD touch screen, and the LCD touch screen can be fixed by a lock after rotation adjustment, the structural design of the lock is complex, and the fixing effect on the panel is not stable. Once the panel is subjected to a certain external force, the locking effect will be released. Therefore, in response to the above-mentioned shortcomings of the existing horizontal and vertical screen brackets and horizontal and vertical screen rotation devices, the present application proposes a newly designed horizontal and vertical screen switching device, which is used in the LCD touch-screen all-in-one machine, which not only makes the rotation switching adjustment of the LCD touch screen simpler and more convenient, but also can maintain a high stability after the horizontal and vertical screen is switched. Summary of the invention

[0005] The present invention aims to provide a horizontal and vertical screen switching device for a liquid crystal touch all-in-one machine, so as to realize fast and convenient rotation switching of the liquid crystal touch screen and effectively ensure the stability of the liquid crystal touch screen after switching.

[0006] The present invention is achieved through the following technical solutions: A horizontal and vertical screen switching device for a liquid crystal touch integrated machine, comprising a base, a column and a rotation switching mechanism, the rotation switching mechanism comprising a ring sleeve connected to the upper end of the column, a first rotating column and a second rotating column being rotatably arranged in the ring sleeve, a front end of the first rotating column extending out of the ring sleeve being connected to a connecting component for installing a liquid crystal touch screen, a rear end of the first rotating column being provided with a columnar groove for extending into the second rotating column, the second rotating column and the columnar groove being axially movable and circumferentially limited, and a spring being connected between the second rotating column and the columnar groove, an arc guide groove with a sector angle of 90° being provided on the inner wall of the ring sleeve, and both ends of the arc guide groove being provided with forwardly arranged card grooves, and a guide member acting with the arc guide groove being provided on the outer circumferential surface of the second rotating column; A pull rope is arranged in the vertical channel inside the column, the upper end of the pull rope extends into the ring sleeve and is connected to the second rotating column, a pedal part is rotatably connected in the base, and the lower end of the pull rope extends into the base and is connected to the pedal part.

[0007] As a further arrangement of the above scheme, the front and rear ends of the ring sleeve are respectively provided with a large-diameter through hole and a small-diameter through hole, the first rotating column is arranged in the large-diameter through hole, a roller ring groove is arranged on the hole wall of the large-diameter through hole, a ball ring that acts on the roller ring groove is arranged on the first rotating column, the second rotating column is arranged in the small-diameter through hole, and the arc guide groove and the card groove are opened on the hole wall of the small-diameter through hole.

[0008] As a further arrangement of the above scheme, the two roller ring grooves are respectively opened at the two ends of the hole wall of the large diameter through hole, two ball rings are provided on the first rotating column, and they respectively interact with the roller ring grooves at the two ends, two arc guide grooves and two clamping grooves are each provided, and they are both centrally symmetrically arranged on the hole wall of the small diameter through hole, and two guide members are provided on the second rotating column, and they respectively interact with the corresponding arc guide grooves.

[0009] As a further configuration of the above solution, the guide member is a guide roller or a guide column with an outer circumference covered with a rubber layer.

[0010] As a further configuration of the above solution, an axial limit groove is provided on the groove wall of the columnar groove, and a limit sliding block that interacts with the axial limit groove is provided on the outer circumferential surface of the second rotating cylinder.

[0011] As a further arrangement of the above scheme, a first guide wheel aligned with the ring sleeve is provided at the upper end of the vertical channel, the upper end of the pull rope is connected to the second rotating column after being guided by the first guide wheel, two second guide wheels are provided inside the base, and the lower end of the pull rope is connected to the pedal part after being guided by the two second guide wheels.

[0012] As a further configuration of the above scheme, a beveled surface is provided on the base, the pedal part is rotatably connected to the beveled surface through a torsion spring and a rotating shaft, and the end of the pull rope passes through a strip opening on the beveled surface and is connected to the pedal part.

[0013] As a further configuration of the above scheme, the ring sleeves at both ends of the arc guide groove are concentrically provided with aligned arc blind holes, the arc blind holes are connected with arc buffer columns via arc springs, and the ends of the arc buffer columns extending out of the arc blind holes are configured to be hemispherical.

[0014] During use of the horizontal and vertical screen switching device for a liquid crystal touch integrated machine disclosed in the present invention, when the liquid crystal touch screen needs to be rotated and switched by 90 degrees (i.e., horizontal and vertical screen switching), the user first steps on the foot pedal to pull the pull rope by rotating the foot pedal, and then pulls the second rotating column outward from the inside of the columnar groove under the action of the pull rope, so that the guide member originally matched with the slot moves axially to the end of the arc guide groove, and then rotates the liquid crystal touch screen 90 degrees again, so that the guide member rotates from one end of the arc guide groove to the other end, and after the rotation switching is completed, the stepping action on the foot pedal is withdrawn, and then reset under the action of the spring and the torsion spring. The reset guide member will move axially to the slot at the other end, thereby locking the rotation action, so that the liquid crystal touch screen can stably maintain the current state.

[0015] In addition, when the LCD touch screen is large in size and heavy in weight, once the guide piece is removed from the slot and the locking effect is released, the LCD touch screen may rotate rapidly due to gravity and collide after rotating 90°. In this state, the user can step on the pedal part and remove the guide piece from the slot, and then quickly lift the foot from the pedal part. At this time, the second rotating column will move axially under the action of the spring, so that the guide piece is pressed on the groove wall of the arc guide groove, increasing the friction resistance during the rotation and movement process, so that the rotation adjustment of the LCD touch screen has a certain damping effect, avoiding collision due to rapid rotation under the action of gravity. At the same time, due to the action of the arc spring and the arc buffer column, the guide piece that rotates rapidly to the end of the arc guide groove will be buffered and damped, reducing the power of its rotation adjustment to the end, and playing a better protective role in the rotation adjustment process of the LCD touch screen.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The horizontal and vertical screen switching device for a liquid crystal touch-controlled all-in-one machine disclosed in the present invention can automatically release the locked state of the liquid crystal touch screen by the user simply by stepping on the footrest when the liquid crystal touch screen is rotated 90 degrees. The liquid crystal touch screen can then be rotated. After the rotation switching is completed, the liquid crystal touch screen can be locked again by lifting the sole of the foot from the footrest. This makes the rotation switching process of the liquid crystal touch screen simple and convenient, and the liquid crystal touch screen can be locked and fixed after switching. The structural design of the entire device is simple and ingenious, and it has a good use effect when used in the horizontal and vertical screen switching of the liquid crystal touch-controlled all-in-one machine.

[0017] The horizontal and vertical screen switching device in the present invention can also immediately withdraw the force on the foot pedal during the rotation process after the foot pedal is stepped on, so that the guide member and the arc guide groove maintain a tight contact during the rotation adjustment process, so as to increase the friction resistance during the rotation process, so that the rotation adjustment of the LCD touch screen has a certain damping effect. At the same time, under the action of the arc spring and the arc buffer column, it can also play a shock-absorbing and buffering role in the downward rotation process of the LCD touch screen, thereby providing better protection for the rotation adjustment process of the LCD touch screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the external first-angle three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the external second angle three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional coordination structure of the rotary switching mechanism in the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the first rotating column, the second rotating column, the ball ring, etc. in the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the ring sleeve in the present invention; Figure 6 It is a schematic diagram of the internal plane structure of the base and the column in the present invention; Figure 7 It is a schematic diagram of the internal three-dimensional structure of the base in the present invention; Figure 8 It is a schematic diagram of the internal planar structure when the rotary switching mechanism in Example 2 of the present invention is engaged. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 8 , and describes the application in detail with reference to embodiments. Example 1

[0022] Embodiment 1 discloses a device for switching between horizontal and vertical screens for a liquid crystal touch-control integrated machine, which is described below in conjunction with the entire liquid crystal touch-control integrated machine. Figure 1 and attached Figure 2 The LCD touch integrated machine includes a LCD touch screen 1, a base 2, a column 3 and a rotation switching mechanism 4, the column 3 is fixedly arranged on the upper surface of the base 2, the rotation switching mechanism 4 is connected to the upper end of the column 3, and the LCD touch screen 1 is connected to the front end of the rotation switching mechanism 4.

[0023] Reference Figures 3~5 The rotary switching mechanism 4 includes a ring sleeve 401 fixedly connected to the front side of the upper end of the column 3, and a large diameter through hole 402 and a small diameter through hole 403 are concentrically opened inside the ring sleeve 401, so that the stepped through hole composed of the large diameter through hole 402 and the small diameter through hole 403 runs through the entire ring sleeve 401. A roller ring groove 404 is opened on the hole wall of the large diameter through hole 402, and specifically, one roller ring groove 404 can be set at the front and back, and two arc guide grooves 405 with a fan angle of 90° are opened on the inner wall of the small diameter through hole 403 in a centrally symmetrical manner, and an axial clamping groove 406 is opened at both ends of the arc guide groove 405 toward the front end.

[0024] A first rotating column 407 is concentrically arranged in the large diameter through hole 402, and a second rotating column 408 is concentrically arranged in the small diameter through hole 403, and one end of the second rotating column 408 is inserted into the columnar groove 4071 on the end face of the first rotating column 407, and then a connecting plate 6 is connected to the front end face of the first rotating column 407 extending out of the ring sleeve 401, and a mounting plate 7 for assembling the liquid crystal touch screen 1 is arranged at the front end of the connecting plate 6. An assembly ring groove 4072 aligned with the roller ring groove 404 is opened on the outer circumferential surface of the first rotating column 407, and then a ball ring 409 acting on the roller ring groove 404 is installed in each assembly ring groove 4072. Through the action of the two ball rings 409 and the roller ring groove 404, the first rotating column 407 can be stably rotated in the large diameter through hole 402.

[0025] A plurality of axial limit grooves 4073 are evenly arranged on the inner wall of the columnar groove 4071, and then a limit slider 410 is arranged on the outer circumferential surface of the second rotating column 408 to interact with each axial limit groove 4073, so that the second rotating column 408 can rotate synchronously during the rotation of the first rotating column 407. A spring 411 is connected to the inner end wall of the columnar groove 4071, and the other end of the spring 411 is connected to the end surface of the second rotating column 408, so that the first rotating column 407 and the second rotating column 408 form an axially retractable movable joint column. Finally, two guide rollers are arranged on the outer circumferential surface of the second rotating column 408 in a centrally symmetrical manner, and the two guide rollers are respectively extended into the corresponding arc guide groove 405 to cooperate with it.

[0026] Reference Figure 6 A vertical channel 301 is provided inside the column 3, and the lower end of the vertical channel 301 is connected to the inner cavity of the base 2. A rope threading hole connected to the ring sleeve 401 is provided at the upper end of the vertical channel 301, and then a pull rope 5 is connected to the center of the rear end surface of the second rotating column 408, so that the pull rope 5 extends into the vertical channel 301 through the rope threading hole. A first guide wheel 302 aligned with the rope threading hole is provided at the upper end of the vertical channel 301, so that the pull rope 5 entering the vertical channel 301 extends into the inner cavity of the base 2 after being guided by the first guide wheel 302.

[0027] Reference Figure 6 and attached Figure 7The base 2 includes a base shell 201, and a rolling member 202 is arranged at each of the four corners of the lower surface of the base shell 201. The rolling member 202 can be a universal wheel or a ball bearing foot, so that the entire LCD touch integrated machine can be easily moved. A beveled surface is provided on the front upper surface of the base shell 201, and a footrest 203 is rotatably connected to the beveled surface through a rotating shaft 204 and a torsion spring 205, and the upper surface of the footrest 203 is provided with corresponding anti-slip grooves 206 to prevent the footrest 203 from slipping due to the smooth surface when stepping on it.

[0028] Two second guide wheels 207 are arranged in the inner cavity of the base shell 201, one of which is aligned with the first guide wheel 302, and the other is arranged below the bevel surface. The lower end of the pull rope 5 passes through the strip opening 208 on the bevel surface and is connected to the lower surface of the upper end of the pedal part 203 after being guided by the two second guide wheels 207.

[0029] When the LCD touch integrated machine disclosed in this embodiment 1 needs to switch the screen horizontally or vertically, the user first steps on the pedal 203 with his foot, and the pull rope 5 is pulled during the stepping of the pedal 203. Then, the pull rope 5 exerts a pulling force on the second rotating column 408, so that it overcomes the force of the spring 411 and moves axially outward from the inside of the columnar groove 4071 until the guide roller on the second rotating column 408 moves out of the slot 406 and enters the end of the arc guide groove 405. Then, the user rotates the LCD touch screen 1, and during the rotation process, the first rotating column 407 and the second rotating column 408 rotate synchronously inside the ring 401, and the guide roller rotates along one end of the arc guide groove 405 to the other end until the guide roller rotates to the other end of the arc guide groove 405. Finally, the foot is lifted from the pedal portion 203, and then the second rotating column 408 is axially moved and reset under the force of the spring 411, so that the guide roller is inserted into the slot at the other end of the arc guide slot 405, thereby fully ensuring the stability of the LCD touch screen 1 after adjustment. Example 2

[0030] Example 2 discloses a horizontal and vertical screen switching device that is further optimized and improved based on the technical solution in Example 1. The similarities with Example 1 are not described again. The key improvement of this Example 2 is to prevent the guide roller from moving out of the slot 406 and entering the arc guide groove 405, and then quickly rotating 90° along the arc guide groove 405 and colliding due to the gravity of the LCD touch screen 1.

[0031] The optimized design of this embodiment 2 includes two parts. First, a guide column 12 is set on the outer circumference of the second rotating column 408 to replace the guide roller, and a rubber layer is coated on the outer circumference of the guide column 12. In the process of rotating the LCD touch screen 1 by 90°, when the guide column 12 enters the arc guide groove 405, the foot is directly lifted from the pedal part 203. At this time, the second rotating column 408 will be pulled axially toward the first rotating column 407 under the action of the spring 411, so that the rubber layer on the surface of the guide column 12 is pressed against the groove wall of the arc guide groove 405, so that the roller rotates to change the friction transmission, and then the rotation adjustment of the LCD touch screen 1 has a certain damping effect to avoid collision due to rapid rotation under the action of gravity.

[0032] Second, refer to the attached Figure 8 In the ring sleeves 401 at both ends of the arc guide groove 405, arc blind holes are concentrically opened and aligned, an arc spring 413 is connected to the inner end wall of the arc blind hole, an arc buffer column 414 is connected to the movable end of the arc spring 413, and the end of the arc buffer column 414 extending out of the arc blind hole is set to be hemispherical, so as to facilitate the guide column 12 to move out of the slot 406 and enter the end of the arc guide groove 405 without causing obstruction to it.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A horizontal and vertical screen switching device for a liquid crystal touch integrated machine, characterized in that: The invention comprises a base, a column and a rotation switching mechanism, wherein the rotation switching mechanism comprises a ring sleeve connected to the upper end of the column, a first rotating column and a second rotating column are rotatably arranged in the ring sleeve, a front end of the first rotating column extending out of the ring sleeve is connected to a connecting component for installing a liquid crystal touch screen, a rear end of the first rotating column is provided with a columnar groove for extending into the second rotating column, the second rotating column and the columnar groove are axially movable and circumferentially limited, and a spring is connected between the second rotating column and the columnar groove, an arc guide groove with a sector angle of 90° is provided on the inner wall of the ring sleeve, and both ends of the arc guide groove are provided with forwardly arranged card grooves, and a guide member acting with the arc guide groove is provided on the outer circumferential surface of the second rotating column; A pull rope is arranged in the vertical channel inside the column, the upper end of the pull rope extends into the ring sleeve and is connected to the second rotating column, a pedal part is rotatably connected in the base, and the lower end of the pull rope extends into the base and is connected to the pedal part.

2. The device for switching between horizontal and vertical screens for a liquid crystal touch integrated machine according to claim 1, characterized in that: The front and rear ends of the ring sleeve are respectively provided with a large-diameter through hole and a small-diameter through hole, the first rotating column is arranged in the large-diameter through hole, a roller ring groove is arranged on the hole wall of the large-diameter through hole, a ball ring that acts on the roller ring groove is arranged on the first rotating column, the second rotating column is arranged in the small-diameter through hole, and the arc guide groove and the clamping groove are arranged on the hole wall of the small-diameter through hole.

3. The device for switching between horizontal and vertical screens for a liquid crystal touch integrated machine according to claim 2, characterized in that: The two roller ring grooves are respectively opened at the two ends of the hole wall of the large diameter through hole, the first rotating column is provided with two ball rings, and they respectively interact with the roller ring grooves at the two ends, the arc guide groove and the clamping groove are each provided with two, and they are both centrally symmetrically arranged on the hole wall of the small diameter through hole, and the second rotating column is provided with two guide members, and they respectively interact with the corresponding arc guide grooves.

4. A horizontal and vertical screen switching device for a liquid crystal touch integrated machine according to claim 1 or 3, characterized in that: The guide member is a guide roller or a guide column with a rubber layer coated on its outer circumference.

5. The device for switching between horizontal and vertical screens for a liquid crystal touch integrated machine according to claim 1, characterized in that: An axial limiting groove is provided on the groove wall of the columnar groove, and a limiting sliding block that acts on the axial limiting groove is provided on the outer circumferential surface of the second rotating cylinder.

6. The device for switching between horizontal and vertical screens for a liquid crystal touch integrated machine according to claim 1, characterized in that: A first guide wheel aligned with the ring sleeve is provided at the upper end of the vertical channel, and the upper end of the pull rope is connected to the second rotating column after being guided by the first guide wheel. Two second guide wheels are provided inside the base, and the lower end of the pull rope is connected to the pedal part after being guided by the two second guide wheels.

7. The device for switching between horizontal and vertical screens for a liquid crystal touch integrated machine according to claim 6, characterized in that: The base is provided with an oblique surface, the pedal part is rotatably connected in the oblique surface through a torsion spring and a rotating shaft, and the end of the pull rope passes through a strip opening on the oblique surface and is connected with the pedal part.

8. The device for switching between horizontal and vertical screens for a liquid crystal touch integrated machine according to claim 1, characterized in that: The ring sleeves at both ends of the arc guide groove are concentrically provided with aligned arc blind holes, the arc blind holes are connected with arc buffer columns through arc springs, and the ends of the arc buffer columns extending out of the arc blind holes are arranged in a hemispherical shape.

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