Adjustable computer display screen support

Abstract

The utility model discloses an adjustable computer display screen support, which relates to the technical field of display screen supports, and comprises a base, a stand column, a support arm component and a stand column locking mechanism, the support arm component is sleeved on the stand column in a sliding manner through a sliding block main body, and the stand column locking mechanism comprises an inner sleeve and an outer sleeve. The inner sleeve sleeves the stand column and is located below the sliding block body, the outer wall of the upper portion of the inner sleeve is provided with external threads, the outer wall of the lower portion of the inner sleeve is provided with an external conical surface, the side wall of the inner sleeve is provided with a vertical groove opening penetrating to the bottom end, the outer sleeve sleeves the inner sleeve from bottom to top, the upper portion of the inner wall of the outer sleeve is provided with internal threads matched with the external threads, and the lower portion of the inner sleeve is provided with an internal conical surface matched with the external conical surface; when the outer sleeve is rotated to move upwards along the external threads, the inner conical face extrudes the outer conical face, and the lower end of the inner sleeve is forced to contract inwards in the radial direction to hold the stand column tightly. According to the utility model, the traditional point-line contact locking is improved into surface contact embracing locking, so that the locking force is increased, the sinking and displacement of the display in the use process are avoided, and the supporting stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of display screen bracket technology, specifically an adjustable computer display screen bracket. Background Technology

[0002] With the development of office automation and the e-sports industry, height-adjustable monitor stands have become widely used to support computer monitors. Existing monitor stands with uprights typically consist of a slider body that slides onto the upright, and a locking mechanism to lock the slider body at a specific height on the upright.

[0003] Currently, most column slider locking mechanisms on the market are eccentric cam locking types. These have a lever on the slider body with an eccentric cam at the base. When the lever is turned, the cam presses against the column surface, generating friction to achieve locking. While this structure offers fast operation, the cam and column only have point or line contact, resulting in limited locking force. After a period of use, the slider body is prone to sinking due to vibration or load. Therefore, this invention proposes an adjustable computer display bracket. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable computer display stand to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable computer display stand, including a base, a column erected on the base, and a support arm assembly for connecting the display. The support arm assembly is slidably fitted onto the column via a slider body. It also includes a column locking mechanism, comprising: an inner sleeve fitted onto the column and located below the slider body; the upper outer wall of the inner sleeve has an external thread, and the lower outer wall has a ring of external conical surfaces; a vertical groove opening extending to the bottom is provided on the lower side wall of the inner sleeve along the axial direction; and an outer sleeve fitted from bottom to top outside the inner sleeve; the upper part of the inner wall of the outer sleeve has an internal thread that mates with the external thread, and the lower part of the inner wall has a ring of internal conical surfaces that match the shape of the external conical surfaces. When the outer sleeve is rotated to move upward along the external thread, the internal conical surfaces press against the external conical surfaces, forcing the lower end of the inner sleeve to contract radially inward to grip the column.

[0006] In an optional implementation,

[0007] The large end of the outer tapered surface is close to the side where the external thread is located, and the small end is far away from the side where the external thread is located.

[0008] In an optional implementation,

[0009] The lower side wall of the inner sleeve has multiple vertical groove openings, and each vertical groove opening extends axially to the bottom of the inner sleeve.

[0010] In an optional implementation,

[0011] The lower opening of the inner wall of the outer sleeve is provided with a first annular dustproof lip that protrudes radially inward. The first annular dustproof lip is located below the inner conical surface, and its inner diameter is smaller than the outer diameter of the column.

[0012] In an optional implementation,

[0013] The inner wall of the outer sleeve is provided with a second annular dustproof lip that protrudes radially inward between the inner conical surface and the internal thread. Its inner diameter is smaller than the outer diameter of the inner sleeve.

[0014] In an optional implementation,

[0015] The top of the inner wall of the outer sleeve is provided with an inner ratchet ring, which is composed of multiple ratchet grooves that are evenly distributed circumferentially and extend axially.

[0016] In an optional implementation,

[0017] An open elastic retaining ring is fitted on the outer wall of the upper part of the inner sleeve. The two ends of the open elastic retaining ring protrude radially outward to form a locking part. When the outer sleeve is screwed upward to the locking position, the locking part is engaged in the ratchet groove to prevent the outer sleeve from being loosened by reverse rotation without manual operation.

[0018] In an optional implementation,

[0019] The upper end of the inner sleeve and the lower end of the slider body are connected by a stepped structure to form an axially limited and circumferentially rotatable movable connection.

[0020] In an optional implementation,

[0021] The end of the vertical groove opening is provided with a stress relief hole.

[0022] In an optional implementation,

[0023] The diameter of the stress relief hole is larger than the width of the vertical groove opening.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] The adjustable computer display stand provided by this utility model, during the locking process, rotates the outer sleeve to move upward along the external thread on the upper part of the inner sleeve. The inner conical surface at the lower part of the outer sleeve gradually squeezes the outer conical surface at the lower part of the inner sleeve, causing the bottom end of the inner sleeve to contract radially and evenly inward under the guidance of the vertical groove opening. This tightens the entire inner sleeve onto the surface of the column, forming a surface contact type of circumferential locking effect, which improves the effective locking area and friction torque. It can also achieve reliable axial positioning at the locking position, avoiding phenomena such as the slider body sinking or height drift of the display during use due to vibration or long-term load, thus improving the stability and durability of the stand support.

[0026] This invention features a first annular dustproof lip and a second annular dustproof lip at the lower opening of the inner wall of the outer sleeve and above the inner conical surface, respectively. These lip pieces fit snugly or with minimal clearance against the outer surface of the column and the outer wall of the inner sleeve, effectively preventing external dust and debris from entering the threaded joint and conical surface mating area. This avoids jamming, wear, or locking failure caused by foreign object intrusion, extending the maintenance cycle and service life of the adjustment mechanism. Furthermore, the inner ratchet ring at the top of the inner wall of the outer sleeve engages with the elastic retaining ring at the upper opening of the inner sleeve. When the outer sleeve is tightened upwards to the locked position, the engaging part smoothly engages into the corresponding ratchet groove, forming a one-way anti-reverse locking mechanism. This design ensures that when the bracket bears the weight of the monitor and environmental vibrations, the outer sleeve will not experience slight reverse loosening due to external forces. The locking state can only be released after the operator actively applies sufficient loosening torque to overcome the engaging resistance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the column locking mechanism of this utility model;

[0029] Figure 3 This is a schematic diagram showing the connection between the inner sleeve, outer sleeve, and slider body of this utility model;

[0030] Figure 4 This is a schematic diagram showing the connection between the inner sleeve and the outer sleeve of this utility model;

[0031] Figure 5 This is a schematic diagram of the inner sleeve and outer sleeve structure of this utility model;

[0032] Figure 6 This is a schematic diagram showing the engagement state of the open elastic retaining ring and the inner ratchet ring of this utility model.

[0033] In the diagram: 1. Base; 2. Column; 3. Support arm assembly; 4. Slider body; 5. Column locking mechanism; 6. Inner sleeve; 7. External thread; 8. External conical surface; 9. Vertical groove opening; 10. Outer sleeve; 11. Internal thread; 12. Inner conical surface; 13. First annular dustproof lip; 14. Second annular dustproof lip; 15. Inner ratchet ring; 16. Racket groove; 17. Opening elastic retaining ring; 18. Engaging part; 19. Stepped structure; 20. Stress relief round hole. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Example 1: Please refer to Figures 1-6 The figure shows an adjustable computer monitor stand, including a base 1, a column 2 erected on the base 1, and a support arm assembly 3 for connecting the monitor. The support arm assembly 3 is slidably fitted onto the column 2 via a slider body 4. The main improvement of this utility model is the addition of a column locking mechanism 5, which includes an inner sleeve 6 and an outer sleeve 10. The inner sleeve 6 is fitted onto the column 2 and located below the slider body 4. The upper outer wall of the inner sleeve 6 has an external thread 7, and the lower outer wall has a ring of external conical surface 8. The lower side wall of the inner sleeve 6 has an axially extending vertical groove opening 9 that extends to the bottom. The outer sleeve 10 is fitted onto the inner sleeve 6 from bottom to top. The upper part of the inner wall of the outer sleeve 10 has an internal thread 11 that mates with the external thread 7, and the lower part of the inner wall has a ring of internal conical surface 12 that matches the shape of the external conical surface 8.

[0036] In this design, when the monitor height needs to be adjusted and locked, the operator slides the slider body 4 along with the support arm assembly 3 along the column 2 to the desired position, and then rotates the outer sleeve 10, causing it to move upward along the outer thread 7 on the upper part of the inner sleeve 6 by means of the engagement of the inner and outer threads 7. As the outer sleeve 10 rotates upward, the inner conical surface 12 located at the lower part of the inner wall of the outer sleeve 10 gradually contacts the outer conical surface 8 at the lower part of the inner sleeve 6 and generates relative compression. With the continuous application of rotational torque, the radial inward component of the force exerted by the inner conical surface 12 on the outer conical surface 8 forces the lower end of the inner sleeve 6 to contract radially inward. Since a vertical groove opening 9 extending to the bottom is pre-opened on the side wall of the lower part of the inner sleeve 6, this opening provides deformation space for the radial contraction of the lower end of the inner sleeve 6, allowing the inner wall of the bottom end of the inner sleeve 6 to uniformly and tightly embrace the outer cylindrical surface of the column 2, forming a surface contact locking. Compared to the point-to-line contact of the traditional eccentric cam structure, this conical ring-type locking can provide greater frictional locking force and maintain the locking state through the self-locking characteristics of the threaded pair itself, thereby effectively preventing the display from slipping or shifting during long-term use.

[0037] It should be noted that, in order to achieve a reasonable wedging effect, the larger end of the outer conical surface 8 is closer to the side where the external thread 7 is located, and the smaller end is farther away from the side where the external thread 7 is located. In this way, when the outer sleeve 10 moves upward, the inner conical surface 12 moves relative to the outer conical surface 8 from the smaller end to the larger end, which can smoothly establish a radial contraction force. In addition, in order to ensure that the contraction deformation of the lower end of the inner sleeve 6 is uniform and the clamping force is symmetrically distributed, there are multiple vertical groove openings 9 on the side wall of the lower part of the inner sleeve 6, preferably nine or ten, and each vertical groove opening 9 extends axially to the bottom end of the inner sleeve 6, thereby dividing the lower part of the inner sleeve 6 into multiple inwardly elastically deformable arc-shaped lobes.

[0038] In this design, to improve the durability and stability of the locking mechanism under long-term use, a corresponding dustproof structure is also provided. Specifically, a first annular dustproof lip 13 is provided at the lower opening of the inner wall of the outer sleeve 10, protruding radially inward. The first annular dustproof lip 13 is located below the inner conical surface 12, and its inner diameter is smaller than the outer diameter of the column 2. When the outer sleeve 10 is installed in place, a small gap or slight contact is formed between the inner edge of the first annular dustproof lip 13 and the surface of the column 2, which can effectively prevent dust and debris from below from entering the threaded and conical mating pairs upward along the surface of the column 2. Furthermore, a second annular dustproof lip 14 is also provided on the inner wall of the outer sleeve 10 between the inner conical surface 12 and the internal thread 11, protruding radially inward. Its inner diameter is smaller than the outer diameter of the inner sleeve 6. The second annular dustproof lip 14 forms a closed or nearly closed barrier structure with the outer wall surface of the inner sleeve 6, thereby preventing external dust from entering the conical mating area from the upper threaded connection. These two dust-proof lips work together to ensure the long-term smooth operation of the locking mechanism and prevent locking failure or thread wear caused by foreign objects getting stuck.

[0039] In this design, to prevent the outer sleeve 10 from accidentally loosening due to non-human operation under the influence of minor torque generated by environmental vibrations or the weight of the monitor, a ratchet anti-loosening structure is also provided. Specifically, the top of the inner wall of the outer sleeve 10 is provided with an inner ratchet ring 15, which is composed of multiple ratchet grooves 16 evenly distributed circumferentially and extending axially. Correspondingly, an open elastic retaining ring 17 is fitted on the upper outer wall of the inner sleeve 6, with both ends of the open elastic retaining ring 17 protruding radially outward to form engaging portions 18. When the operator rotates the outer sleeve 10 upward and approaches the end point of the locking position, the engaging portions 18 on the open elastic retaining ring 17 will slide past the ratchet grooves 16 one tooth at a time as the outer sleeve 10 rotates; once the outer sleeve 10 is tightened upward to the preset locking position, the engaging portions 18 will engage in the corresponding ratchet grooves 16. At this time, if the outer sleeve 10 is subjected to a reverse rotational torque, the engagement of the locking part 18 and the ratchet groove 16 will provide a backstop resistance, thereby limiting the reverse rotation and loosening of the outer sleeve 10 without manual operation. Only when the operator actively applies a sufficiently large loosening torque to overcome this resistance can the locked state be released, thus improving the reliability and safety of the locking.

[0040] It should be noted that, in order to prevent the monitor and the support arm assembly 3 from rotating together with the outer sleeve 10 during height adjustment, the upper end of the inner sleeve 6 and the lower end of the slider body 4 are connected by a stepped structure 19, which provides axial restraint and circumferential rotation. This stepped structure 19 can be, for example, an annular groove at the upper end of the inner sleeve 6 and a corresponding annular flange at the lower end of the slider body 4. The two are constrained axially but can rotate freely relative to each other in the circumferential direction. Thus, when adjusting the height, the operator only needs to hold and rotate the outer sleeve 10 to lock or unlock it, while the slider body 4 and the connected monitor portion will not passively deflect circumferentially, thereby maintaining the stability of the monitor's viewing angle and the convenience of operation.

[0041] It should be noted that when the outer sleeve 10 is screwed upwards and tightened into place, its top rests against the bottom of the stepped structure 19, which can prevent dust from entering the outer sleeve 10 from top to bottom. To further improve the dustproof effect, the user can also install a rubber gasket around the top of the outer sleeve 10.

[0042] In this design, considering that the root of the vertical groove opening 9 is prone to fatigue cracks due to stress concentration during the long-term repeated contraction and rebound of the lower end of the inner sleeve 6, a stress relief hole 20 is provided at the end of the vertical groove opening 9. The diameter of the stress relief hole 20 is larger than the width of the vertical groove opening 9. This stress relief hole 20 can disperse the stress originally concentrated at the end of the sharp cut to the arc surface, thereby reducing the stress peak, improving the fatigue life of the inner sleeve 6, and ensuring the long-term effectiveness and structural integrity of the locking mechanism.

[0043] Example 2: This embodiment further explains Example 1, the difference being that the connection details between the inner sleeve 6 and the slider body 4 and the stress relief structure are further optimized.

[0044] Specifically, a wear-resistant washer or a lubricating coating can be added between the stepped structure 19 at the upper end of the inner sleeve 6 and the slider body 4 to ensure a smooth feel during long-term rotational operation. At the same time, the inner wall of the stress relief hole 20 can be shot-peened or polished to further eliminate residual stress from processing. However, even without additional surface treatment, the stress relief hole 20 itself can achieve a good stress dispersion effect.

[0045] It should be noted that in this design, all metal components, such as the column 2, inner sleeve 6, and outer sleeve 10, can be made of aluminum alloy or stainless steel and precision machined to ensure sufficient structural strength and fitting accuracy. The outer surface of the outer sleeve 10 can be knurled or have an added wrench operating surface to facilitate rotation by the operator.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable computer display stand, comprising a base (1), a column (2) erected on the base (1), and a support arm assembly (3) for connecting the display, wherein the support arm assembly (3) is slidably fitted onto the column (2) via a slider body (4); characterized in that It also includes a column locking mechanism (5), which includes: The inner sleeve (6) is fitted on the column (2) and located below the slider body (4). The outer wall of the upper part of the inner sleeve (6) is provided with an external thread (7), and the outer wall of the lower part is provided with an outer conical surface (8). The side wall of the lower part of the inner sleeve (6) is provided with a vertical groove opening (9) that extends through to the bottom end along the axial direction. The outer sleeve (10) is fitted over the inner sleeve (6) from bottom to top. The upper part of the inner wall of the outer sleeve (10) is provided with an inner thread (11) that matches the outer thread (7), and the lower part of the inner wall is provided with an inner conical surface (12) that matches the shape of the outer conical surface (8). When the outer sleeve (10) is rotated to move upward along the external thread (7), the inner conical surface (12) presses against the outer conical surface (8), forcing the lower end of the inner sleeve (6) to contract radially inward to hold the column (2).

2. The adjustable computer monitor support of claim 1, wherein: The large end of the outer conical surface (8) is close to the side where the external thread (7) is located, and the small end is far away from the side where the external thread (7) is located.

3. The adjustable computer monitor support of claim 1, wherein: The inner sleeve (6) has multiple vertical groove openings (9) on its lower side wall, and each vertical groove opening (9) extends axially to the bottom end of the inner sleeve (6).

4. The adjustable computer monitor support of claim 1, wherein: The lower end opening of the inner wall of the outer sleeve (10) is provided with a first annular dustproof lip (13) that protrudes radially inward. The first annular dustproof lip (13) is located below the inner conical surface (12), and its inner diameter is smaller than the outer diameter of the column (2).

5. The adjustable computer monitor support of claim 1, wherein: The inner wall of the outer sleeve (10) is provided with a second annular dustproof lip (14) that protrudes radially inward between the inner conical surface (12) and the inner thread (11), and its inner diameter is smaller than the outer diameter of the inner sleeve (6).

6. The adjustable computer monitor support of claim 1, wherein: The top of the inner wall of the outer sleeve (10) is provided with an inner ratchet ring (15), which is composed of multiple ratchet grooves (16) that are evenly distributed circumferentially and extend axially.

7. The adjustable computer monitor support of claim 6, wherein: An open elastic retaining ring (17) is fitted on the outer wall of the upper part of the inner sleeve (6). The two ends of the open elastic retaining ring (17) protrude radially outward to form a locking part (18). When the outer sleeve (10) is screwed upward to the locking position, the locking part (18) is engaged in the ratchet groove (16) to restrict the outer sleeve (10) from being loosened by reverse rotation under non-human operation.

8. The adjustable computer monitor support of claim 1, wherein: The upper end of the inner sleeve (6) and the lower end of the slider body (4) are connected by a stepped structure (19) to form an axially limited and circumferentially rotatable movable connection.

9. The adjustable computer monitor support of claim 1, wherein: The end of the vertical slot opening (9) is provided with a stress relief hole (20).

10. The adjustable computer monitor support of claim 9, wherein: The diameter of the stress relief hole (20) is greater than the width of the vertical groove opening (9).

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