Rotation limiting device for display screen

Abstract

A rotation limiting device used for a display screen comprises a pivot joint assembly, the pivot joint assembly comprises a body, a neck portion extends out of the front portion of the body, a shaft rod extends out of two sides of the neck portion, two end faces of the shaft rod are respectively provided with a through groove in the axial direction, and two sides of the shaft rod respectively penetrate through a load and torsion unit and a bending piece of a tilting support. The supporting assembly comprises a fixed plate which is connected and linked with the pair of tilting brackets; the rotary connecting assembly is provided with a connecting plate and a limiting plate, the limiting plate is provided with a limiting hole, the hole diameter of the limiting hole is smaller than the length of the shaft rod, the periphery of the limiting hole is communicated with a pair of first grooves and a pair of second grooves which are arranged in a cross shape in the radial direction, and the distance between the pair of first grooves and the pair of second grooves corresponds to the length of the shaft rod; and the front clamping plate is connected to the fixed plate, and the front clamping plate and the pair of tilting brackets jointly clamp the rotary connecting assembly.

Description

Technical Field

[0001] The utility model relates to a rotation limiting device, in particular to a rotation limiting device used for a display screen. Background Art

[0002] With the development of technology, digital imaging products have become very popular. Nowadays, in order to provide users with a suitable viewing angle, a pivot assembly that can provide a tilt angle is usually set between a display screen and a support frame. Therefore, by operating the pivot assembly, the adjustment of the tilt angle of the display screen is more user-friendly. In fact, in addition to the tilt angle and height adjustment functions, most of the display support frames currently on the market also have a plane rotation (PIVOT) and left and right rotation (SWIVEL) swing adjustment function to meet the needs of different users.

[0003] For example, in the Chinese patent publication No. CN101551053B, a planar rotation mechanism of a support device is disclosed. The patent is to set a plurality of arc-shaped guide grooves on a bracket, connect a number of guide posts corresponding to the guide grooves to a rotating member, and slide each of the guide posts into the corresponding guide grooves, so as to drive a display screen to be synchronously lifted relative to the bracket and rotated in a plane, so as to facilitate the user to directly turn the display screen from a horizontal screen to a vertical screen; however, this type of structure cannot independently adjust the height position of the display screen in the horizontal screen state, so that there are some limitations on the adjustment, and because there is no locking structure, it is easy for the user to accidentally touch and rotate the display screen.

[0004] In addition, taking the Chinese patent announcement No. CN101881365B as an example, it discloses a support frame that allows screen rotation and height adjustment to be interlocked. It discloses that when a display screen is in a horizontal state at the lowest position, a locking portion of a first pivot of a sliding member is located in an enlarged hole of a guide groove, so that a narrow side of the locking portion is aligned with the guide groove, so that the first pivot can move longitudinally in the guide groove to adjust the height; in addition, when the display screen is rotated to a vertical state, a wide side of the locking portion is aligned with the guide groove and blocks the first pivot. The guide groove makes it impossible for the display screen to be raised in height, that is, under the limiting effect of a limiting structure formed by the narrow side and the wide side of the locking portion on a track formed by the guide groove and the enlarged hole, when the user needs to rotate the display screen from a horizontal screen to a vertical screen, the display screen must first be raised to the top before it can be rotated in a plane; however, during the rotation process, the input terminal arranged at the back or bottom of the display screen may collide or entangle with a bracket because the circuit is too close to the base, resulting in the circuit being loosened and missing.

[0005] Therefore, how to reduce the impact of the corners of the display screen on a horizontal surface, such as a table top or a base, when the display screen is turned in a plane, and how to prevent the line from falling off due to collision with the bracket are difficult problems that technical personnel in this field need to overcome urgently. Utility Model Content

[0006] The main purpose of the utility model is to provide a rotation limit device for a display screen, which is positioned by a first cross bar and a second cross bar of a pivot assembly and a stopper of a main body during the forward tilt or backward flipping process, so that any groove connected to a rotating connection component is rotated to be parallel and corresponding to any through groove of an axle rod before plane rotation can be performed; when the plane rotates to the through groove of the axle rod corresponding to another groove of the rotating connection component, the rotating connection component can be rotated back forward for convenient use.

[0007] In order to achieve the above-mentioned purpose, the technical means adopted by the utility model is to provide a rotation limit device for display screen, which includes a pivot assembly, which includes a body with a neck extending from the front, the body and the two side adjacent surfaces of the neck respectively form a first stop wall and a second stop wall, and a shaft extends from the other two sides of the neck, and the shaft is respectively equipped with a load and torque unit on the other two sides of the neck, and an end surface of the shaft is axially provided with a through groove, wherein each of the load and torque units includes an inclined groove passed through the two ends of the shaft. A bending piece of a tilt bracket; and a first cross bar and a second cross bar arranged in parallel on both sides of the shaft, the cross bars pass through the bending piece of the tilt bracket and are screwed to the bending piece of the other tilt bracket; and a support assembly, which includes a fixed plate connected and linked to the pair of tilt brackets, the fixed plate has a rear plate hole for the pair of load and torque units to pass through; a rotating connection component, which includes a connecting plate that uses a central plate hole to sleeve the fixing plate so that the connecting plate is adjacent to the pair of tilt brackets, and a connecting plate connected to the connecting plate. The limit plate of the plate has a limit hole with an aperture smaller than the length of the shaft rod, the limit hole is radially connected to a first groove and a second groove which are spaced apart and arranged non-parallel, and the end of the shaft rod having the through groove can arbitrarily pass through the corresponding first groove or the second groove; and a front clamping plate with a front plate hole for the load and torque unit to extend out, the front clamping plate is connected to the fixed plate and clamps the rotating connection assembly together with the pair of tilt brackets, so that the connecting plate and the limit plate can rotate between the front clamping plate and the pair of tilt brackets. Rotate; before the rotation limit device performs a planar rotation, the pair of tilt brackets and the rotation connection assembly are tilted and adjusted until the first cross bar touches the first blocking wall, so that the pair of tilt brackets and the support assembly are tilted at a preset angle relative to the shaft rod, and an inner ring wall of the limit plate is parallel to the through groove of the shaft rod; then the rotation connection assembly is rotated in a planar manner, so that the inner ring wall penetrates into the through groove of the shaft rod, until the through groove of the shaft rod is rotated from the first groove to the second groove to form another usage state.

[0008] In one embodiment, the pair of tilt brackets and the rotating connection assembly are tilted in the opposite direction until the second cross bar touches the second stop wall, so that the pair of tilt brackets and the support assembly can be tilted back to a vertical direction relative to the shaft.

[0009] In one embodiment, a connecting portion for connecting to a supporting device is formed at the rear of the main body.

[0010] In one embodiment, the load and torque unit includes a torsion spring respectively sleeved on both sides of the shaft and passing through the corresponding bending sheets, and further sleeved with at least one elastic body and a gasket, and a tightening member is screwed to the shaft.

[0011] In one embodiment, the circumferential surfaces on both sides of the shaft are respectively provided with a pivoting section for limiting the lateral movement of the torsion spring.

[0012] In one embodiment, a first end of each torsion spring is inserted into a spring hole preset in the side surface of the body, and a second end thereof abuts against the second crossbar.

[0013] In one embodiment, a pair of stops are protruding from the center of the bottom back of the connecting plate, and a stop edge is protruding from the periphery of the pair of tilt brackets; when the connecting plate is turned in a plane, any one of the stops touches the corresponding stop edge, which is the rotation limit.

[0014] In one embodiment, a wear-resistant ring that is linked to the pair of tilting brackets and the front clamping plate is respectively provided between the connecting plate and the pair of tilting brackets and between the front clamping plate and the limiting plate.

[0015] In one embodiment, the adjacent surfaces of the wear-resistant ring and the pair of tilting brackets are relatively provided with at least one positioning tenon and at least one positioning hole that are plugged into each other, so that the wear-resistant ring is fixed to the pair of tilting brackets; and the adjacent surfaces of the other wear-resistant ring and the front splint are also relatively provided with at least one positioning tenon and at least one positioning hole that are plugged into each other, so that the other wear-resistant ring is fixed to the front splint.

[0016] In one embodiment, a positioning ring portion is protruded from the periphery of the wear-resistant ring and the central plate hole of the connecting plate, so that the connecting plate is positioned and clamped between the pair of tilt brackets and the front clamping plate.

[0017] In one embodiment, each of the two end surfaces of the shaft rod is axially provided with a through groove, and the limiting hole is radially connected to a pair of first grooves and a pair of second grooves that are arranged at intervals, wherein the distance between the pair of first grooves and the pair of second grooves corresponds to the length of the shaft rod; the pair of through grooves can simultaneously pass through the inner ring wall and pass out from any one of the pair of first grooves or the pair of second grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above contents and other purposes, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0019] Figure 1 This is a three-dimensional exploded view of the rotation limit device of the utility model;

[0020] Figure 2 It is a three-dimensional exploded view of the hinge assembly of the utility model;

[0021] Figure 3 and Figure 4 The three-dimensional diagrams of the rotation limit device of the utility model at two different viewing angles after being assembled;

[0022] Figure 5 for Figure 3a cross-sectional view taken along line AA;

[0023] Figure 6 for Figure 3 a cross-sectional view taken along line BB;

[0024] Figure 7 A cross-sectional view of the support assembly of the utility model after adjusting the rearward angle to a fixed position;

[0025] Figure 8 This is a three-dimensional diagram of the utility model in which the support assembly is rotated;

[0026] Fig. 9 This is a schematic diagram of the utility model in which the support assembly is rotated to 90 degrees;

[0027] Fig.10 This is a schematic diagram of the utility model in which the support assembly is rotated to 90 degrees from another viewing angle;

[0028] Fig.11 It is a schematic diagram of adjusting the forward tilt angle of the support assembly to a fixed position according to the utility model;

[0029] Fig.12 A three-dimensional exploded view of the rotation limit device, the front cover and the rear cover of the utility model; and

[0030] Fig.13 and Fig.14 for Fig.12 The shown three-dimensional images are from two different perspectives after the rotation limit device, the front cover and the rear cover are assembled.

[0031] In the above drawings, the meanings of the reference numerals are as follows:

[0032] 1. Articulated assembly;

[0033] 11. Ontology;

[0034] 111. Neck;

[0035] 112. First retaining wall;

[0036] 113, second retaining wall;

[0037] 114. Spring hole;

[0038] 12. Axle rod;

[0039] 121, threaded section;

[0040] 122, pivoting section;

[0041] 123. Groove;

[0042] 13. Connecting part;

[0043] 14. Torsion spring;

[0044] 141, first end;

[0045] 142, second end;

[0046] 15. Tilt bracket;

[0047] 151, bending sheet;

[0048] 152, mortise and tenon;

[0049] 153. Keyhole;

[0050] 154. Block edge;

[0051] 155. Positioning hole;

[0052] 16. Elastomer;

[0053] 161, gasket;

[0054] 162. Fasteners;

[0055] 17. Wear-resistant gasket;

[0056] 171, tenon;

[0057] 18. First horizontal bar;

[0058] 19. Second horizontal bar;

[0059] 2. Support assembly;

[0060] 21. Fixed plate;

[0061] 211, rear plate hole;

[0062] 22. Rotate the connecting assembly;

[0063] 221, connecting plate;

[0064] 221a, central plate hole;

[0065] 221b, stop;

[0066] 222, limit plate;

[0067] 222a, limiting hole;

[0068] 222b, first groove;

[0069] 222c, second groove;

[0070] 222d, inner ring wall;

[0071] 23. Front splint;

[0072] 231. Front plate hole;

[0073] 232, positioning hole;

[0074] 24. Wear-resistant ring;

[0075] 241, positioning tenon;

[0076] 242, positioning ring;

[0077] 25. Back panel;

[0078] 251, through hole;

[0079] 26. Front cover;

[0080] 27. Back cover;

[0081] 271. Perforation. DETAILED DESCRIPTION

[0082] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. The terms used herein are only for describing specific embodiments and are not intended to limit the utility model.

[0083] The terms "include", "comprising", etc. used herein indicate the presence of the features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components. All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0084] In this document, unless otherwise specified, directional terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device, element or component referred to must have a specific orientation, be constructed or operate in a specific orientation. It should be understood that when the absolute position of the described object changes, the relative positional relationship they represent may also change accordingly. Therefore, these directional terms cannot be understood as limiting the present invention.

[0085] When using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc. When using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.

[0086] See also Figures 1 to 6 , which discloses a preferred embodiment of a rotation limiting device for a display screen, the rotation limiting device includes a pivot assembly 1 and a supporting assembly 2.

[0087] See also Figure 1 and Figure 2 The pivot assembly 1 includes a body 11, a neck 111 for a shaft 12 to pass through extends from the front of the body 11, the neck 111 and the upper and lower adjacent surfaces of the body 11 respectively form a first retaining wall 112 and a second retaining wall 113, and a connecting portion 13 is formed at the rear of the body 11, and the connecting portion 13 is used to connect a supporting device, such as a support frame or a wall bracket (not shown). The body 11, the shaft 12 and the connecting portion 13 are preferably formed by metal embedding injection molding, so that the body 11, the shaft 12 and the connecting portion 13 are integrally formed to increase the overall structural strength.

[0088] A load and torque unit is installed on each side of the shaft 12. The load and torque unit includes a bending piece 151 that passes through a tilt bracket 15 after each shaft 12 is sleeved with a torsion spring 14, and is further sleeved with at least one elastic body 16 and a gasket 161. The elastic body 16 can be, for example, a spring, a disc-shaped spring sheet or a wave-shaped spring sheet, and a tightening piece 162, such as an anti-slip nut, is screwed to a preset threaded section 121 of the shaft 12 to facilitate tightening the at least one elastic body 16 between the gasket 161 and the bending piece 151, so that a torsion force is generated between the gasket 161 and the bending piece 151, and the torsion spring 14 can be used to assist in supporting the display screen together and allow the pair of tilt brackets 15 to have a forward and backward positioning effect; on the other hand, the tightening degree of the at least one elastic body 16 can be adjusted by the tightening piece 162 to facilitate a slight adjustment of the supporting force.

[0089] Furthermore, a wear-resistant gasket 17 is further arranged between each torsion spring 14 and the corresponding bending piece 151 to prevent the torsion spring 14 from directly rubbing against the bending piece 151. Each wear-resistant gasket 17 extends a tenon 171 axially extending from the torsion spring 14 and snapping into a tenon groove 152 preset in the corresponding bending piece 151, so that the wear-resistant gasket 17 is fixed on the bending piece 151.

[0090] Furthermore, a pivoting section 122 is protruded from each of the two side circumferences of the shaft rod 12, and the pivoting section 122 limits the lateral movement of the torsion spring 14, and one side of the bending piece 151 abuts against one side of each pivoting section 122, so as to avoid the need for the existing assembly process of adding a bushing. In particular, a through slot 123 with an inclined angle is axially formed on each of the two end surfaces of the shaft rod 12, so as to lock or unlock a stop plate 222 described below.

[0091] Each load and torque unit further comprises a first crossbar 18 and a second crossbar 19, such as Figure 2 As shown, during assembly, the first cross bar 18 and the second cross bar 19 respectively pass through the bending piece 151 of one tilt bracket 15 and are screwed to the bending piece 151 of the other tilt bracket 15, and the first cross bar 18 and the second cross bar 19 are respectively located above and below the neck 111, so that during the forward tilt or backward flipping process, when the first cross bar 18 abuts against the first baffle wall 112, it is the limit of the backward tilt angle; and when the second cross bar 19 abuts against the second baffle wall 113, it is the limit of the forward tilt angle, so as to form a stop positioning effect respectively.

[0092] Furthermore, a first end 141 of each torsion spring 14 is inserted into a spring hole 114 preset on the side of the body 11, and a second end 142 is abutted against the second crossbar 19. Although the elastic force of the torsion springs 14 is sufficient to resist the weight of a display screen (not shown), in order to achieve torque balance, it is preferred to adjust the tightening member 162 to press the torque generated by the at least one elastic body 16, and to assist the elastic force of the torsion springs 14 to form a compensation relationship to jointly resist the weight of the display screen, so as to extend the service life of the torsion springs 14. In other words, after reducing the coils of each torsion spring 14, the actual structural style of the at least one elastic body 16 can be used as compensation, such as increasing the number of spring sheets (or increasing the number of coils when a spring is used) to achieve the purpose of jointly supporting the display screen.

[0093] The assembled state of the articulated assembly 1 is shown in Figure 1 To provide connection for the display screen, the rotation limiting device further comprises a supporting assembly 2, which comprises a fixing plate 21, a rotation connection component 22 having a connecting plate 221 and a limiting plate 222, and a front clamping plate 23.

[0094] The fixing plate 21 has a rear plate hole 211 for the pair of load and torque units to pass through, and is connected, for example, by a locking member such as a screw to the pair of tilt brackets 15, so that the fixing plate 21 and the pair of tilt brackets 15 form a linkage. Figure 1 and Figure 2 The pair of tilt brackets 15 are symmetrically provided with a plurality of locking holes 153 for the corresponding locking members to penetrate the front clamping plate 23 and the fixing plate 21 and be locked.

[0095] The connecting plate 221 of the rotating connecting assembly 22 is sleeved on the fixing plate 21 by a central plate hole 221a having a larger hole diameter than the rear plate hole 211, and is adjacent to the pair of tilt brackets 15. The connecting plate 221 complies with the VESA specification for connecting the display screen, so that the weight of the display screen is carried by the pair of torsion springs 14 and the at least one elastic body 16 that complement each other, achieving the effect of torsion and elastic force complementing each other to balance the weight, which can facilitate the user to adjust the viewing angle of the display screen by plane rotation, forward tilt and backward tilt.

[0096] In order to provide an angle limit for the planar rotation of the connecting plate 221, a pair of stops 221b are protruding from the center of the bottom of the back side of the connecting plate 221, and a stop edge 154 is protruding from the periphery of the pair of tilt brackets 15; when the connecting plate 221 rotates clockwise or counterclockwise in the plane, any stop 221b touches a corresponding stop edge 154, which is the rotation limit.

[0097] The limiting plate 222 is a plate body with an outer diameter larger than the central plate hole 221a, and is connected, for example, screwed or riveted to the connecting plate 221, so that the two can rotate synchronously. The limiting plate 222 has a limiting hole 222a with an aperture smaller than the length of the shaft 12, and the limiting hole 222a is radially connected to a pair of first grooves 222b and a pair of second grooves 222c arranged in a cross, wherein the distance between the pair of first grooves 222b and the pair of second grooves 222c corresponds to the length of the shaft 12. Therefore, when the display screen and the rotating connection assembly 22 are in a horizontal screen state, the shaft 12 is located in the pair of first grooves 222b, and when in a vertical screen state, the shaft 12 is located in the pair of second grooves 222c.

[0098] The front clamping plate 23 is also a plate body with an outer diameter larger than the central plate hole 221a. It has a front plate hole 231 for the pair of load and torque units to pass through, and is connected, for example, with a locking member such as a screw to the fixed plate 21, and together with the pair of tilt brackets 15, clamps the rotating connection component 22, so that the rotating connection component 22 can rotate between the front clamping plate 23 and the pair of tilt brackets 15 to achieve the purpose of rotation.

[0099] In addition, in order to reduce friction and abnormal noise when the connecting plate 221 and the limiting plate 222 rotate, a wear-resistant ring 24 made of polymer material and linked with the pair of tilting brackets 15 and the front clamping plate 23 is provided between the connecting plate 221 and the pair of tilting brackets 15 and between the front clamping plate 23 and the limiting plate 222.

[0100] At least one positioning tenon 241 and at least one positioning hole 155 are provided on the adjacent surfaces of one wear-resistant ring 24 and the pair of tilt brackets 15, so that the wear-resistant ring 24 is fixed to the pair of tilt brackets 15. Similarly, at least one positioning tenon 241 and at least one positioning hole 232 are provided on the adjacent surfaces of the other wear-resistant ring 24 and the front clamping plate 23, so that the wear-resistant ring 24 is fixed to the front clamping plate 23.

[0101] In addition, a positioning ring portion 242 is protruded from the other side of the wear-resistant ring 24 fixed to the pair of tilt brackets 15 . The positioning ring portion 242 corresponds to the periphery of the central plate hole 221 a of the connecting plate 221 , so that the connecting plate 221 is clamped and positioned to the pair of tilt brackets 15 .

[0102] Furthermore, each of the wear-resistant rings 24 is made of polyoxymethylene (POM, also known as polyoxymethylene, polyacetal) to provide wear resistance and self-lubricating functions.

[0103] The supporting assembly 2 further includes a back plate 25, and the connecting plate 221 is connected, for example, by a locking member such as a screw to the back plate 25. The back plate 25 has a through hole 251 for the main body 11 and the connecting portion 13 to extend out, so as to facilitate the connection of the pivot assembly 1 to the supporting device.

[0104] The front and rear stereograms of the rotation limiter after being assembled according to the above description are shown in FIG. Figure 3 and Figure 4 , and the rotation limit device is along Figure 3 The cross-sectional views taken along the lines AA and BB are shown in FIG. Figure 5 and Figure 6 .

[0105] Depend on Figure 5 It can be seen that the pivot assembly 1 having the load and torque unit is disposed in the support assembly 2, and the fixing plate 21 is mounted on the connecting plate 221, which contributes to the overall thin design. Therefore, there will be no protrusions on the back of the back plate 25, thereby effectively shortening the distance from the pivot assembly 1 to the supporting device.

[0106] Depend on Figure 6It can be seen that when the rotating connection component 22 is in the horizontal state, the shaft 12 is located in the pair of first grooves 222b, but each of the through grooves 123 and an inner annular wall 222d of the limiting hole 222a of the limiting plate 222 form an inclined and non-parallel offset pattern. At this time, if the rotating connection component 22 is rotated in a plane, the inner annular wall 222d will touch the shaft 12 to form a locked state that cannot rotate.

[0107] See also Figures 7 to 10 If the rotating connection assembly 22 is to be rotated from the horizontal screen to the vertical screen, the user holds the display screen or the rotating connection assembly 22 with his hand to adjust the back until the first crossbar 18 of the pivot assembly 1 touches the first stop wall 112 of the neck 111, so that the pair of tilt brackets 15 and the support assembly 2 are tilted backwards at a preset angle, such as 22 degrees, relative to the shaft 12, and the inner annular wall 222d of the limit plate 222 and the pair of through grooves 123 of the shaft 12 form a parallel pattern (as shown in FIG. Figure 7 ).

[0108] Next, during the planar rotation of the display screen or the rotating connection assembly 22, the inner ring wall 222d of the stop plate 222 is inserted into the through groove 123 of the shaft 12 (as shown in FIG. Figure 8 ), until it is rotated into the vertical screen configuration, the two end surfaces of the shaft 12 are moved from being located in the pair of first grooves 222b to being located in the pair of second grooves 222c (as shown in FIG. Fig. 9 ), and a stopper 221b is stopped at a corresponding stop edge 154, which is the rotation limit of the rotating connection component 22 (shown in Fig.10 ).

[0109] Finally, the user holds the display screen or the rotating connection assembly 22 with his hand to adjust the forward tilt until the second crossbar 19 of the pivot assembly 1 touches the second stop wall 113 of the neck 111, so that the pair of tilt brackets 15 and the support assembly 2 are tilted back to the vertical direction relative to the shaft 12 (shown in FIG. Fig.11 ) to complete the step of turning the horizontal screen into the vertical screen.

[0110] See also Figure 12 to Figure 14 If the main body 11 of the pivot assembly 1 and the pair of tilt brackets 15 are not treated by electroplating for rust prevention and beautification, a front cover 26 (shown in FIG. 26 ) may be connected to the front of the front clamping plate 23. Fig.12 and Fig.13 ) to cover the front plate hole 231 and the load and torque unit therein; and a rear cover 27 is sleeved between the back of the pivot assembly 1 and the back plate 25, and the rear cover 27 has a through hole 271 (shown in FIG. 2 ) corresponding to the cross section of the body 11 for the body to pass through. Fig.12 and Fig.14 ) to shield the pair of tilt brackets 15 and the load and torque unit to prevent foreign matter from entering and have an aesthetic appeal.

[0111] In the embodiment provided by the utility model, its beneficial effect lies in that, before the rotation limit device converts the direction of the horizontal screen and the vertical screen, the tilt bracket and the support assembly must first be tilted to a preset tilt angle, and then the operation sequence of plane rotating the rotating connection component can not only prevent the user from rotating the screen by accidental touch, but also first tilt the tilt bracket and the rotating connection component backward to increase the distance between the bottom of the display screen and the horizontal plane, such as a table top or a base, thereby reducing the impact on the corners of the display screen; in particular, after the tilt bracket and the support assembly are tilted backward, in addition to increasing the distance between the rear of the display screen and the support device, it can also prevent the line from falling off due to collision with the support device.

[0112] In the description of this case, it should be understood that the terms center, lateral, longitudinal, front, back, up, down, left, right, top, bottom, inside, outside, etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing this case and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this case.

[0113] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

[0114] The embodiments of the present invention are described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present invention is defined by the attached claims and their equivalents. Without departing from the scope of the present invention, a person skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A rotation limiting device for a display screen, characterized in that: include: A pivot assembly, comprising a body with a neck extending forward, the body and the adjacent surfaces on both sides of the neck respectively forming a first stop wall and a second stop wall, and a shaft extending from the other two sides of the neck, the shaft being provided with a load and torque unit on the other two sides of the neck respectively, an end surface of the shaft axially opening a through slot, wherein each of the load and torque units comprises a bending piece of a tilt bracket passed through by both ends of the shaft; and a first cross bar and a second cross bar arranged in parallel on both sides of the shaft, the first cross bar and the second cross bar passing through the bending piece of the tilt bracket and being screwed to the bending piece of another tilt bracket; and A support assembly, which includes a fixed plate connected and linked to the pair of tilt brackets, the fixed plate having a rear plate hole for the pair of load and torque units to pass through; a rotating connection assembly, which includes a connecting plate that uses a central plate hole to sleeve the fixed plate so that the connecting plate is adjacent to the pair of tilt brackets, and a limiting plate connected to the connecting plate, the limiting plate having a limiting hole with a hole diameter smaller than the length of the shaft rod, the limiting hole radially connecting a first groove and a second groove that are spaced and arranged non-parallel, and the end of the shaft rod having the through groove can arbitrarily pass through the corresponding first groove or the second groove; and a front clamping plate with a front plate hole for the load and torque unit to extend out, the front clamping plate is connected to the fixed plate and together with the pair of tilt brackets clamps the rotating connection assembly, so that the connecting plate and the limiting plate can rotate between the front clamping plate and the pair of tilt brackets; Before the rotation limit device is turned in a plane, the pair of tilt brackets and the rotation connection assembly are tilted and adjusted until the first cross bar touches the first blocking wall, so that the pair of tilt brackets and the support assembly are tilted at a preset angle relative to the shaft rod, and an inner ring wall of the limit plate is parallel to the through groove of the shaft rod; then the rotation connection assembly is rotated in a plane so that the inner ring wall penetrates into the through groove of the shaft rod until the through groove of the shaft rod is rotated from the first groove to the second groove to form another usage state.

2. The rotation limiting device for a display screen according to claim 1, characterized in that: The pair of tilt brackets and the rotating connection assembly are tilted and adjusted in the opposite direction until the second cross bar touches the second retaining wall, so that the pair of tilt brackets and the supporting assembly can be tilted back to a vertical direction relative to the shaft.

3. The rotation limiting device for a display screen according to claim 1, characterized in that: A connecting portion for connecting to a supporting device is formed at the rear of the main body.

4. The rotation limiting device for a display screen according to claim 1, characterized in that: The load and torque unit comprises a torsion spring respectively sleeved on both sides of the shaft and passing through the corresponding bending sheets, and further sleeved with at least one elastic body and a gasket, and a tightening piece is screwed on the shaft.

5. The rotation limiting device for a display screen according to claim 4, characterized in that: The circumferential surfaces on both sides of the shaft rod are respectively provided with a pivoting section for limiting the lateral movement of the torsion spring.

6. The rotation limiting device for a display screen according to claim 4, characterized in that: A first end of each torsion spring is inserted into a spring hole preset on the side surface of the main body, and a second end thereof is butted against the second crossbar.

7. The rotation limiting device for a display screen according to claim 1, characterized in that: A pair of stops are protruding from the center of the bottom back of the connecting plate, and a stop edge is protruding from the periphery of the pair of tilting brackets; when the connecting plate is turned in a plane, any one of the stops touches the corresponding stop edge, which is the rotation limit.

8. The rotation limiting device for a display screen according to claim 1, characterized in that: A wear-resistant ring which is linked with the pair of tilting brackets and the front clamping plate is respectively arranged between the connecting plate and the pair of tilting brackets and between the front clamping plate and the limiting plate.

9. The rotation limiting device for a display screen according to claim 8, characterized in that: The adjacent surfaces of the wear-resistant ring and the pair of tilting brackets are relatively provided with at least one positioning tenon and at least one positioning hole that are plugged into each other, so that the wear-resistant ring is fixed to the pair of tilting brackets; and the adjacent surfaces of the other wear-resistant ring and the front splint are also relatively provided with at least one positioning tenon and at least one positioning hole that are plugged into each other, so that the other wear-resistant ring is fixed to the front splint.

10. The rotation limiting device for a display screen according to claim 8, characterized in that: A positioning ring portion is protruded from the wear-resistant ring and the periphery of the central plate hole of the connecting plate, so that the connecting plate is positioned and clamped between the pair of tilting brackets and the front clamping plate.

11. The rotation limiting device for a display screen according to any one of claims 1 to 10, characterized in that: The two end surfaces of the shaft rod each have an axial through groove, and the limiting hole radially connects a pair of first grooves and a pair of second grooves that are arranged at intervals, wherein the distance between the pair of first grooves and the pair of second grooves corresponds to the length of the shaft rod; the pair of through grooves can simultaneously pass through the inner ring wall and pass out from any one of the pair of first grooves or the pair of second grooves.

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