CN217540246U - Rotary synchronous lifting structure - Google Patents

Abstract

The utility model relates to a rotary synchronous lifting structure, which mainly comprises a supporting piece, wherein an end surface is arranged between two side edges of the supporting piece, a longitudinal guide groove, an oblique guide groove and a transverse guide groove are arranged on the end surface, an interval is arranged between the longitudinal guide groove and the oblique guide groove, the top end of the oblique guide groove is provided with a lower hook part, the transverse guide groove transversely extends to the bottom ends of the longitudinal guide groove and the oblique guide groove, a bending part at one end of the transverse guide groove bends downwards to one corner in an arc shape, and the other end of the transverse guide groove crosses the bottom end of the oblique guide groove; a lifting mechanism is connected with the supporting piece; the first guide post passes through the longitudinal guide groove to be connected with the lifting mechanism, and the second guide post and the third guide post respectively pass through the transverse guide groove and the oblique guide groove, so that the display forms transverse and vertical rotation interchange.

Description

Rotary synchronous lifting structure

Technical Field

The present invention relates to a synchronous lifting structure, and more particularly to a synchronous lifting structure with synchronous lifting function.

Background

In addition to the adjustment of the elevation angle of the conventional display, a lifting device is usually added to adjust the height or further to enable the display screen to rotate left and right, so that the functions of the conventional display become more complete and diversified, and the requirements of different users are met. However, in the conventional stand, the rotation adjustment function and the lifting adjustment function need to be adjusted separately, for example, a user needs to adjust the rotation angle of the display first before adjusting the height of the display, or the user needs to adjust the height of the display first before adjusting the rotation angle of the display, and cannot adjust the rotation and the lifting simultaneously, which is inconvenient in operation.

To provide various viewing modes of a flat monitor, as shown in the patent of "monitor improved in tilt structure" publication No. CN 1244852C, it mainly includes a monitor main body, a monitor stand is fixedly installed on the back of the monitor main body, a base hinge above the base stand is pivoted to the lower end of a connecting component, the upper end of the connecting component has a main hinge which is pivoted to a main stand, the monitor stand is pivoted to the main stand by a pivot component, so that the monitor main body and the monitor stand are vertically rotated on the main stand by the pivot component. Since the height between the bottom edge of the monitor main body and the base assembly is smaller than the distance from a corner of the bottom edge of the monitor main body to the pivot member, the corner of the bottom edge of the monitor main body may touch the desktop to damage the monitor main body during the vertical rotation. Therefore, in order to avoid this phenomenon, the connecting member must have a height adjusting function so that the height between the monitor main body and the base member can be adjusted in advance when the monitor main body is rotated in the vertical direction, and the height is greater than the distance between the corner of the bottom edge of the monitor main body and the pivot member, so that the monitor main body can be smoothly rotated in the horizontal direction. However, as the size of flat panel monitors becomes larger, or the length to width ratio changes, for example, 16: the specification of 9 greatly increases the distance from the corner of the bottom edge of the monitor main body to the pivot member, and makes it difficult to accommodate the vertical rotation mechanism.

Moreover, as the screen is becoming thinner and the requirement of diversified customization is added, besides the screen can present a landscape mode or a portrait mode for convenient use, the base shape can be diversified by combining the conventional computer peripheral devices on the bracket or the base, such as the patent publication CN210920768U and the patent publication CN206684621U, but when the top surface of the base is raised or has an inclined surface, such as the patent publication CN206684621U and the patent publication CN307150662S, the vertical or horizontal rotation of the screen is easily obstructed. Therefore, it is a difficult problem to be overcome by those skilled in the art to provide a device that can prevent the corner of the bottom edge from colliding with the base or the table when the supported object, such as a flat display like a screen, is rotated in a vertical plane.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is an object of the present invention to provide a rotary synchronous lifting structure, which is different from the prior art, and improves the above-mentioned disadvantages. An object of the present invention is to provide a synchronous lifting structure for rotation, so as to solve the problem that when the vertical surface of a flat panel display such as a conventional screen is rotated, a corner of the bottom edge easily collides with the base or the desktop.

In order to achieve the above object, the present invention provides a rotary synchronous lifting structure, which comprises a supporting member, a lifting mechanism and a display. The support piece is connected to a base and provided with a first side edge and a second side edge, an end face is arranged between the first side edge and the second side edge, a longitudinal guide groove, an oblique guide groove and a transverse guide groove are arranged on the end face, a space is arranged between the longitudinal guide groove and the oblique guide groove, a lower hook part is arranged at the top end of the oblique guide groove, the transverse guide groove transversely extends to the bottom ends of the longitudinal guide groove and the oblique guide groove, a bending part is arranged at one end of the transverse guide groove, the bending part is bent downwards in an arc shape to a corner where the first side edge and the bottom edge of the support piece meet, and the other end of the transverse guide groove crosses the bottom end of the oblique guide groove to be adjacent to the second side edge; the lifting mechanism is connected with the supporting piece; one end face of the display is provided with a first guide post, a second guide post and a third guide post which are arranged in a triangular mode, the first guide post penetrates through the longitudinal guide groove to be connected with the lifting mechanism, the second guide post penetrates through one end of the transverse guide groove, and the third guide post penetrates through the bottom end of the oblique guide groove, so that the display is transversely arranged; and when the first guide post, the second guide post and the third guide post are moved simultaneously to enable the first guide post to ascend and descend, the second guide post to reach one end of the lower hook part of the inclined guide groove and the third guide post to reach the other end of the transverse guide groove, the display is rotated to be in an upright direction.

When the lifting structure is implemented, the lifting structure comprises a group of slide rails and a sliding assembly, the group of slide rails is connected with the supporting piece, the sliding assembly is connected with the group of slide rails in a vertically movable mode, the sliding assembly is pivoted with one end of the first guide pillar, and the other end of the first guide pillar penetrates through the longitudinal guide groove to be connected with one end face of the display.

When the sliding assembly is implemented, the sliding assembly comprises a sliding part and an elastic telescopic module, the sliding part is pivoted with one end of the first guide pillar, the elastic telescopic module is linked with the sliding part, the elastic telescopic module comprises at least one positioning spring, and one end of the at least one positioning spring is connected with the supporting piece to enable the sliding assembly to move up and down for positioning.

When the positioning device is used, the supporting piece comprises a front end plate, a rear end plate, a left side plate and a right side plate, the front end plate, the rear end plate, the left side plate and the right side plate are enclosed to form an accommodating space, the group of slide rails are fixed in the accommodating space in an upright mode, and one end of at least one positioning spring is connected with the rear end plate.

When in use, the utility model also comprises a positioning column which is parallel to the left side plate, and one side of the positioning column forms a gap for the third guide column to pass through when the third guide column moves in the transverse guide groove; the sliding rail set comprises a first rail and a second rail, wherein two sides of the first rail are respectively connected with one side of the sliding part and the inner side surface of the left side plate, and two sides of the second rail are respectively connected with the other side of the sliding part and the inner side surface of the positioning column, so that the sliding part can move up and down to be positioned.

When in use, the utility model also comprises an adapter plate which is combined with one end surface of the display, and the surface of the adapter plate is provided with a concave part; one end of the first guide post penetrates through the longitudinal guide groove to be pivoted with the lifting mechanism, the other end of the first guide post penetrates through the concave part to be locked with one end sealing piece for connecting the first guide post and the adapter plate, and the first guide post, the adapter plate and the display synchronously rotate relative to the lifting mechanism.

When the display device is implemented, the second guide pillar comprises a first sleeve and a first head-carrying stud, the first sleeve penetrates through and is limited in the inclined guide groove, the first sleeve is sleeved with the first head-carrying stud, and one end of the first head-carrying stud is connected with a first positioning hole in one end face of the display device.

During implementation, the third guide pillar comprises a second sleeve and a second stud with a head, the second sleeve penetrates through and is limited in the transverse guide groove, the second sleeve is sleeved with the second stud with a head, and one end of the second stud with a head is connected into a second positioning hole in one end face of the display.

In practice, the inclined guide groove further comprises an upright part, and the lower hook part extends downwards from the top end of the upright part in the direction towards the longitudinal guide groove, so that the inclined guide groove forms a long upright hook groove.

When the guide device is implemented, the other end of the transverse guide groove is provided with a limiting part for limiting the third guide pillar.

During implementation, the oblique guide groove is communicated with the transverse guide groove downwards, the bottom end of the oblique guide groove is provided with a limiting part, the limiting part is a U-shaped plate, and the limiting part is combined with the front end plate and used for blocking the second guide pillar.

When the display is implemented, the first guide post deviates and does not correspond to the central position of the display.

When the display is implemented, the first guide post corresponds to the central position of the display; the longitudinal guide groove is communicated with the transverse guide groove downwards; the bottom ends of the diagonal guide channels pass downwardly through the lateral guide channels to be adjacent to the bottom edges of the support members.

The beneficial effects of the utility model are that:

the utility model can make the flat panel display move up to the preset position rapidly at the initial stage of the movement when the flat panel display is rotated from the horizontal vertical face to the vertical direction through the structure that three guide posts are arranged on one end face of the flat panel display and can correspondingly slide in three guide slots on a supporting piece, so that the bottom edge corner of the flat panel display can cross the base or the desktop to prevent damage; and in the rotating process, the stable movement can be kept without shaking.

In order to facilitate a deeper understanding of the present invention, it will be described in detail later.

Drawings

Fig. 1 is an exploded view of the components of a first embodiment of the present invention;

fig. 2 is an exploded view of the components of a first embodiment of the present invention;

fig. 3 is a front view of a support member according to a first embodiment of the present invention;

fig. 4 is a schematic front view of a first embodiment of the present invention;

fig. 5 is a schematic view illustrating a usage state of the display device according to the first embodiment of the present invention when the display device is rotated to about 45 degrees;

fig. 6 is a schematic view illustrating a usage state of the display device according to the first embodiment of the present invention when the display device is rotated to 90 degrees;

fig. 7 is a schematic front view of a support member according to a second embodiment of the present invention;

fig. 8 is a front view of a support member according to a third embodiment of the present invention;

fig. 9 is a perspective view of a display according to a third embodiment of the present invention.

Description of the reference numerals

1. Rotating the synchronous lifting structure; 2. a support member; 21. a front end plate; 211. an end face; 212. a longitudinal guide groove; 213. an oblique guide groove; 214. a transverse guide groove; 215. an upright portion; 216. a lower hook part; 217. spacing; 218. a curved portion; 219. a limiting part; 210. a limiting member; 22. a rear end plate; 23. a left side plate; 231. a first side edge; 24. a right side plate; 241. a second side edge; 25. an accommodating space; 26. a positioning column; 261. a notch; 3. a lifting mechanism; 4. a display; 41. a first guide post; 42. a second guide post; 421. a first sleeve; 422. a first stud with a head; 43. a third guide post; 431. a second sleeve; 432. a second stud with a head; 44. a first positioning hole; 45. a second positioning hole; 5. a base; 6. a slide rail; 61. a first track; 62. a second track; 7. a slipping component; 71. a slider; 72. an elastic expansion module; 721. a positioning spring; 8. an adapter plate; 81. a recessed portion; 82. a gasket; 83. an end seal.

Detailed Description

Referring to fig. 1 to 4, a first embodiment of a rotating and synchronously lifting structure 1 of the present invention mainly includes a supporting member 2, a lifting mechanism 3 and a display 4. Wherein the bottom of the supporting member 2 is connected above a base 5; the supporting member 2 is a square frame, and mainly includes a front end plate 21, a rear end plate 22, a left side plate 23 and a right side plate 24, and together form an accommodating space 25; the front end of the front plate 21 has an end surface 211, the left side of the left plate 23 has a first side 231, the right side of the right plate 24 has a second side 241, and the end surface 211 is located between the first side 231 and the second side 241.

The holding space 25 of the supporting member 2 has a long strip-shaped positioning column 26 and the lifting mechanism 3, the positioning column 26 is parallel to the left side plate 23 and the right side plate 24 and is located between the left side plate 23 and the right side plate 24, so as to support the middle position of the front end plate 21; a notch 261 is formed on one side of the positioning post 26. The front end plate 21 has a longitudinal guide groove 212, an oblique guide groove 213 and a transverse guide groove 214 on the end surface 211 penetrating the front end plate 21. The longitudinal guide groove 212 is a long strip-shaped straight groove; the inclined guide groove 212 is an elongated upright hook groove, the inclined guide groove 212 includes an upright portion 215 and a lower hook portion 216, a space 217 is formed between the upright portion 215 and the longitudinal guide groove 212, and the lower hook portion 216 extends downward from the top end of the upright portion 215 in a direction toward the longitudinal guide groove 212; the transverse guiding groove 214 extends transversely to the bottom ends of the vertical portions 215 of the longitudinal guiding groove 212 and the oblique guiding groove 213, one end of the transverse guiding groove 214 has a curved portion 218, the curved portion 218 is curved downward to a corner where the first side 231 meets the bottom edge of the supporting member 2, the other end of the transverse guiding groove 214 passes over the bottom end of the oblique guiding groove 213 to be adjacent to the second side 241, and forms a downward-curved groove which is used as a limiting portion 219, and the groove section between the two ends of the transverse guiding groove 214 corresponds to the notch 261 of the positioning post 26 to form a space for passing through.

The lifting mechanism 3 includes a set of slide rails 6 and a sliding component 7, wherein the set of slide rails 6 includes a first rail 61 and a second rail 62. The sliding assembly 7 includes a sliding member 71 and an elastic telescopic module 72, wherein the left and right sides of the first rail 61 are respectively connected with one side of the sliding member 71 and the inner side of the left side plate 23 in a locking manner, and the left and right sides of the second rail 62 are respectively connected with the other side of the sliding member 71 and the inner side of the positioning post 26 in a locking manner, so that the first rail 61 and the second rail 62 are respectively positioned in the accommodating space 25 of the supporting member 2 in an upright manner, and the sliding assembly 7 moves up and down. The elastic expansion module 72 is linked and located at the bottom of the sliding member 71, and the elastic expansion module 72 includes at least one positioning spring 721, in this embodiment, the positioning spring 721 is one, and a free end of the positioning spring 721 is locked and connected to the rear end plate 22 of the supporting member 2, so as to allow the sliding member 71 to move up and down for positioning.

The rear end surface of the display 4 has a first guide post 41, a second guide post 42 and a third guide post 43 arranged in a triangular manner, the first guide post 41 can deviate from or correspond to the center position of the display 4, and the rear end surface of the display 4 is provided with a plurality of locking holes, a first positioning hole 44 and a second positioning hole 45, wherein the first positioning hole 44 and the second positioning hole 45 are respectively used for inserting and positioning the second guide post 42 and the third guide post 43. A plurality of lock holes on the rear end surface of the display 4 are used for locking and connecting an adapter plate 8, the adapter plate 8 is a square flat plate, and a disc-shaped concave part 81 protruding backwards and a plurality of through holes are formed in the plate surface of the adapter plate 8; in practice, the through holes of the interposer 8 and the locking holes of the rear end surface of the display 4 all conform to the VESA (Video Electronics Standards Association) mounting interface standard, so that a plurality of locking members are correspondingly locked.

When the display 4 is horizontally disposed, one end of the first guide post 41 passes through the lower half of the longitudinal guide slot 212 to pivotally connect to the sliding member 71 of the lifting mechanism 3, and the other end of the first guide post 41 passes through a washer 82 and then passes through the recessed portion 81 of the adapter plate 8 to lock a nut, which is an end seal 83, so that the end seal 83 is accommodated in the recessed portion 81, and the first guide post 41, the adapter plate 8 and the display 4 rotate synchronously. The second guide post 42 includes a first sleeve 421 and a first stud 422, the first sleeve 421 passes through and is limited at the bottom end of the vertical portion 215 of the inclined guide groove 213, the first sleeve 421 is sleeved on the first stud 422, the head of the first stud 422 presses against the front end plate 21, and the threaded end of the first stud 422 is locked or inserted into the first positioning hole 44 of the rear end surface of the display 4 together with the first sleeve 421. The third guide post 43 includes a second sleeve 431 and a second stud 432, the second sleeve 431 passes through and is limited at one end of the curved portion 218 of the transverse guide groove 214, the second sleeve 431 is sleeved on the second stud 432, the head of the second stud 432 is pressed against the front end plate 21, and the threaded end of the second stud 432 is locked or inserted into the second positioning hole 45 of the rear end surface of the display 4 together with the second sleeve 431.

Thus, as shown in fig. 5, when the user pushes the flat panel display to rotate the display 4 from 0 degree to about 45 degrees on one vertical surface, the first guide post 41 is lifted to the upper half of the longitudinal guide slot 212, the second guide post 42 is lifted to the top of the upright portion 215 of the inclined guide slot 213, and the third guide post 43 passes through the notch 261 of the positioning post 26 and reaches the middle position of the transverse guide slot 214 by moving the first guide post 41, the second guide post 42 and the third guide post 43 simultaneously, so that the display 4 is rotated and lifted rapidly at the same time, thereby allowing one corner of the bottom edge of the display 4 to cross the base 5. As shown in fig. 6, when the flat panel display continues to rotate from about 45 degrees to 90 degrees, such that the first guide post 41 descends to the lower half of the longitudinal guide groove 212, the second guide post 42 reaches the end of the lower hook 216 of the oblique guide groove 213, and the third guide post 43 reaches the other end of the transverse guide groove 214 to be positioned at the position-limiting portion 219, the flat panel display and the display 4 can be stably positioned in an upright position.

Please refer to fig. 7, which is a second embodiment of the rotating synchronous lifting structure 1 of the present invention, and the difference between the second embodiment and the first embodiment is: the bottom end of the vertical portion 215 of the inclined guide groove 213 is connected to the transverse guide groove 214 downward, and the bottom end of the vertical portion 215 has a U-shaped plate, which is riveted or welded to the front end surface or the rear end surface of the front end plate 21, and serves as a limiting member 210. Therefore, the front plate 21 can be used as a modular shared component, and is matched with U-shaped plates with different sizes, so that the second guide post 42 can have a stable initial position, and the second guide post 42 is stopped and limited from moving downwards, so as to avoid falling into the intersection of the inclined guide groove 213 and the transverse guide groove 214 to cause action interference.

The first guide post 41 of the first and second embodiments is deviated from the central position of the display 4, and when the first guide post 41 corresponds to the central position of the display 4, the structural shapes and positions of the corresponding longitudinal guide groove 212 and oblique guide groove 213 are adjusted without changing the structural shape and position of the transverse guide groove 214, that is, as shown in fig. 8 and 9, which is a third embodiment of the rotating and synchronously lifting structure 1 of the present invention, the third embodiment is different from the first embodiment in that: the first guide post 41 corresponds to the central position of the display 4; the bottom end of the longitudinal guide groove 212 on the front end plate 21 is communicated with the transverse guide groove 214 downwards; the inclined guide groove 213 and the transverse guide groove 214 are staggered, and the bottom end of the upright part 215 of the inclined guide groove 213 passes downward through the transverse guide groove 214 to be adjacent to the bottom edge of the front end plate 21 of the supporting member 2, so that the first guide post 41, the second guide post 42 and the third guide post 43 can be synchronously moved, the display 4 can be synchronously and rapidly lifted from the initial rotation stage, and the flat panel display can be rotated in the transverse direction and the upright direction.

To sum up, when the flat panel display is rotated from the horizontal vertical surface to the vertical surface, the three guide posts on the flat panel display can correspondingly slide in the three guide slots on the supporting member respectively, so that the flat panel display cannot shake and can keep stable movement, when the flat panel display 4 rotates from 0 degree to about 45 degrees, the flat panel display simultaneously rotates and rapidly rises, namely, the flat panel display 4 rotates and synchronously and rapidly rises at the stage, so that the bottom edge corner of the flat panel display can cross over the base or the desktop to prevent collision damage; and through the pin joint of the first guide post and a lifting mechanism, and the lifting mechanism is provided with an elastic telescopic module, the flat panel display can generate a free and stagnant positioning effect in the process of simultaneously rotating and moving up and down, and is more beneficial to keeping stable lifting motion. And the second guide post is positioned at one end point of the lower hook part of the oblique guide groove, and the third guide post is positioned in the limiting part of the transverse guide groove, so that the flat panel display cannot easily rotate to improve the stability after positioning when the flat panel display and the display form a vertical direction.

Although the present invention discloses a preferred embodiment for achieving the above-mentioned purpose, it is not intended to limit the structural features of the present invention, and any person skilled in the art can obtain all other embodiments without creative work under the technical solution of the present invention, and all these embodiments are covered by the claims of the present invention.

Claims (13)

1. A rotating synchronous lifting structure is characterized by comprising:

a support member, for connecting to a base, the support member having a first side edge and a second side edge, an end surface being disposed between the first side edge and the second side edge, the end surface having a longitudinal guide slot, an oblique guide slot and a transverse guide slot, a space being provided between the longitudinal guide slot and the oblique guide slot, a hook being disposed at a top end of the oblique guide slot, the transverse guide slot extending transversely to a bottom end of the longitudinal guide slot and the oblique guide slot, and a curved portion being disposed at an end of the transverse guide slot, the curved portion being curved downward to a corner where the first side edge meets a bottom edge of the support member, the other end of the transverse guide slot crossing over a bottom end of the oblique guide slot to be adjacent to the second side edge;

a lifting mechanism connected with the supporting piece; and

a display, one end face of which is provided with a first guide post, a second guide post and a third guide post which are arranged in a triangular way, wherein the first guide post passes through the longitudinal guide groove to be connected with the lifting mechanism, the second guide post passes through one end of the transverse guide groove, and the third guide post passes through the bottom end of the oblique guide groove, so that the display is transversely arranged; and when the first guide post, the second guide post and the third guide post are moved simultaneously to enable the first guide post to ascend and descend, the second guide post to reach one end of the lower hook part of the inclined guide groove and the third guide post to reach the other end of the transverse guide groove, the display is rotated to be in an upright direction.

2. The structure as claimed in claim 1, wherein the lifting mechanism comprises a set of sliding rails connected to the supporting member and a sliding member pivotally connected to one end of the first guiding post in a vertically movable manner, and the other end of the first guiding post passes through the longitudinal guiding groove to connect to the end surface of the display.

3. The structure as claimed in claim 2, wherein the sliding assembly comprises a sliding member and an elastic expansion module, the sliding member is pivotally connected to the end of the first guiding post, the elastic expansion module is linked to the sliding member, and the elastic expansion module comprises at least one positioning spring, one end of the at least one positioning spring is connected to the supporting member.

4. The structure as claimed in claim 3, wherein the supporting member comprises a front plate, a rear plate, a left plate and a right plate, and together frame a receiving space, the set of sliding rails is vertically fixed in the receiving space, and the one end of the at least one positioning spring is connected to the rear plate.

5. The structure as claimed in claim 4, further comprising a positioning post parallel to the left plate, one side of the positioning post forming a gap for the third guiding post to pass through when the third guiding post moves in the transverse guiding slot; the set of sliding rails comprises a first rail and a second rail, wherein two sides of the first rail are respectively connected with one side of the sliding part and the inner side surface of the left side plate, and two sides of the second rail are respectively connected with the other side of the sliding part and the inner side surface of the positioning column.

6. The rotating synchronous lifting structure according to claim 1, further comprising an adapter plate coupled to the end surface of the display, the adapter plate having a recess on a surface thereof; one end of the first guide post penetrates through the longitudinal guide groove to be pivoted with the lifting mechanism, the other end of the first guide post penetrates through the concave part to be locked with an end sealing piece for connecting the first guide post and the adapter plate, and the first guide post, the adapter plate and the display synchronously rotate relative to the lifting mechanism.

7. The rotating and synchronously lifting structure of claim 1, wherein the second guide post comprises a first sleeve and a first stud, the first sleeve passes through and is limited in the inclined guide groove, the first sleeve is sleeved on the first stud, and one end of the first stud is connected to a first positioning hole on the one end surface of the display.

8. The rotating and synchronously lifting structure of claim 1 or 7, wherein the third guide post comprises a second sleeve and a second stud with head, the second sleeve passes through and is limited in the transverse guide slot, the second sleeve is sleeved with the second stud with head, and one end of the second stud with head is connected with a second positioning hole of the one end face of the display.

9. The structure of claim 1, wherein the slant channel further comprises an upright portion, the lower hook portion extends downward from the top end of the upright portion in a direction toward the longitudinal channel, so that the slant channel forms an elongated upright hook-shaped groove.

10. The structure as claimed in claim 1, wherein the other end of the transverse guiding slot has a position-limiting portion for limiting the third guiding post.

11. The rotating synchronous lifting structure according to claim 4, wherein the oblique guiding slot is downwardly connected to the transverse guiding slot, a limiting member is disposed at a bottom end of the oblique guiding slot, and the limiting member is a U-shaped plate, and the limiting member is combined with the front end plate.

12. The structure as claimed in claim 1 or 11, wherein the first guide post is offset from a central position of the display.

13. The structure as claimed in claim 1, wherein the first guiding pillar is located at a center of the display; the longitudinal guide groove is communicated with the transverse guide groove downwards; the bottom end of the oblique guide groove passes through the transverse guide groove downwards to be adjacent to the bottom edge of the supporting piece.

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