A reading stand height locking mechanism

Abstract

This patent discloses a height locking mechanism for a reading rack, comprising: a reading rack body for supporting books; a sliding connector for mounting on an external support and slidably connected to the reading rack body via its rear spine to achieve height adjustment; and a limiting adjustment rod movably disposed between the rear spine of the reading rack and the sliding connector; the limiting adjustment rod has an elastic element, and the inner side of the sliding connector has a rack that cooperates with the elastic element; the limiting adjustment rod has a first working state and a second working state: in the first working state, the elastic element opens under its own elastic force, forming a one-way interference with the rack, restricting the downward movement of the reading rack body while allowing it to move upward; in the second working state, by driving the limiting adjustment rod, the elastic element's own elastic force is overcome, causing the elastic element to close, thereby disengaging from the interference with the rack, allowing the reading rack body to move freely up and down. In the free state, the reading rack is in a height-locked state, and the height adjustment function can be unlocked by pinching with two fingers of one hand, while the height of the reading rack can also be adjusted. It greatly improves the convenience of adjusting the height of the reading stand, and there is no noise during adjustment, which significantly enhances the operation and reading experience.

Description

Technical Field

[0001] This patent relates to the field of reading racks, specifically to a reading rack height locking mechanism. Background Technology

[0002] A reading stand, also known as a book holder or reading support, is a widely used auxiliary tool in learning, office work, and daily life. Its core function is to stably support books, tablets, or documents at an ergonomic angle, thereby freeing the user's hands and effectively relieving fatigue and strain in the neck, shoulders, back, and arms caused by prolonged holding of books or looking down while reading. With increasing societal emphasis on healthy eye use and proper posture, reading stands have evolved from simple book-holding tools into essential equipment for enhancing the reading experience and promoting posture management, playing an irreplaceable role in educational, office, and home settings. Among the many functions of a reading stand, flexible height adjustment is a core requirement to meet the needs of users of different heights and in different usage scenarios (such as desktop reading, music stand, and standing office). To achieve this function, existing technologies mainly provide the following solutions:

[0003] First, there's the basic friction-damped structure. This structure typically uses knobs or bolts to apply pressure to the sliding pair, generating static friction for positioning. While this method allows for stepless adjustment, its inherent drawbacks are significant: the adjustment process requires repeated tightening and loosening, making it inconvenient; after prolonged use, the friction components wear down, leading to a decrease in friction and causing the reading holder to slowly slide down on its own, resulting in a "nodding" phenomenon, and the reliability of the locking mechanism is difficult to guarantee. Furthermore, during adjustment and locking, the dry friction between metal or plastic parts often produces an unpleasant "creaking" sound, which can be a significant disturbance in environments such as libraries, classrooms, or quiet offices. Second, there's the segmented positioning structure, commonly seen in the combination of spring pins and a series of positioning holes. This method achieves several fixed height settings by inserting pins into different positioning holes. Its drawbacks include the inability to achieve smooth, stepless adjustment, making it difficult for users to find the most comfortable angle. Furthermore, the mechanical insertion and removal operation is not smooth enough, and the positioning holes and pins are prone to wear after frequent use, leading to loosening and inaccurate positioning. The spring pin inevitably produces a clear "click" sound when inserting and ejecting from the positioning hole; this sudden noise not only breaks the quiet atmosphere but may also distract the user and those around them. Moreover, the requirement for two-handed operation is extremely inconvenient in many scenarios (such as when the user is writing with one hand or in a confined space). More importantly, in this design, the elastic latch is continuously engaged under force in the locked state. Prolonged load can easily lead to material fatigue, plastic deformation, or tooth surface wear, ultimately causing the locking function to fail and affecting the overall lifespan of the product.

[0004] In summary, existing height adjustment mechanisms for reading racks suffer from drawbacks such as inconvenient adjustment and low reliability, or cumbersome operation, poor durability, and excessive noise. Therefore, there is an urgent need in this field for an innovative height locking mechanism that enables one-handed, convenient, and noiseless height adjustment and release, while also possessing higher locking reliability and a longer service life, in order to solve the aforementioned long-standing technical problems. Utility Model Content

[0005] The purpose of this patent is to provide a height locking mechanism for a reading rack. The reading rack is in a height-locked state when in its free state, and its height adjustment function can be unlocked by pinching with two fingers of one hand. This greatly improves the convenience of height adjustment and is noiseless during adjustment, significantly enhancing the operating and reading experience.

[0006] To solve the above-mentioned technical problems, this patent adopts the following technical solution:

[0007] A height locking mechanism for a reading rack includes: a reading rack body for supporting books; a sliding connector for mounting on an external support and slidably connected to the reading rack body via its rear spine to achieve height adjustment; and a limiting adjustment rod movably disposed between the rear spine of the reading rack and the sliding connector; the limiting adjustment rod is provided with an elastic element, and the inner side of the sliding connector is provided with a rack that cooperates with the elastic element.

[0008] The limit adjustment rod has a first working state and a second working state:

[0009] In the first working state, the elastic element opens under its own elastic force, forming a one-way interference with the rack, restricting the downward movement of the main body of the reading rack while allowing it to move upward;

[0010] In the second working state, by driving the limit adjustment rod, the elastic element's own elastic force is overcome, causing the elastic element to close, thereby breaking away from the interference with the rack and allowing the main body of the reading rack to move freely up and down.

[0011] Furthermore, the rear spine of the main body of the reading rack is equipped with a slide rail, and the sliding connector is slidably connected to the slide rail.

[0012] Furthermore, the limit adjustment rod is installed between the slide rail and the sliding connector.

[0013] Furthermore, a limit baffle is provided inside the slide rail to limit the downward movement range of the limit adjustment rod.

[0014] Furthermore, the upper edge of the main body of the reading rack is used to limit the upward movement range of the limit adjustment rod.

[0015] Furthermore, a spring-loaded baffle is provided inside the slide rail.

[0016] Furthermore, when the limit adjustment rod is driven, the elastic element interacts with the spring-loaded baffle, thereby being controlled to deform and close.

[0017] Furthermore, the top of the limit adjustment rod is provided with an operating handle, and a pinch position is formed between the operating handle and the upper edge of the reading rack body.

[0018] Furthermore, the limit adjustment rod is driven by lifting it upwards through the pinch position.

[0019] Furthermore, the elastic element is a V-shaped, U-shaped, or figure-eight shaped integrally molded spring sheet, with its open end forming two claws that can engage with the rack.

[0020] Furthermore, in the first working state, the elastic element is in a free state in the open state and has no elastic potential energy.

[0021] Furthermore, in the closed state of the second working state, elastic potential energy is stored due to deformation.

[0022] Furthermore, the rack is a ratchet rack, and its tooth profile is configured to allow it to unidirectionally cross over when the elastic element is in the open state.

[0023] Furthermore, the elastic element is made of engineering plastic.

[0024] This patent provides a height locking mechanism for a reading rack, which has the following advantages compared to the prior art:

[0025] 1. Enables convenient one-handed full-function operation.

[0026] This patented design creates a short-distance pinching position between the operating handle and the upper edge of the reading holder, allowing users to lift the limit adjustment rod, release the lock, and adjust the height with just one-handed pinching motion. The lock automatically returns to its original position upon release. This solves the problem of traditional mechanisms requiring two hands (one hand to press and release, the other to lower the support), significantly improving the convenience and efficiency of adjustment.

[0027] 2. Improved the reliability and service life of the locking mechanism.

[0028] The elastic element used in this patent is in a freely open state when locked and does not store elastic potential energy. This design avoids the problem of material fatigue or permanent deformation caused by long-term stress in traditional "normally closed" elastic elements, thereby significantly improving the long-term reliability of locking and extending the service life of the mechanism.

[0029] 3. Effectively reduced operating noise

[0030] This patent achieves multi-stage noise reduction in its structure. First, since the elastic element is not under force when locked, the inherent noise generated by continuous compression is eliminated. Second, during height adjustment, the elastic element only contacts and deforms against the spring-loaded baffle at the moment of unlocking, avoiding the "clicking" sound produced by continuous scraping and impact between the elastic element and the rack and pinion during the entire adjustment process, similar to traditional structures. This makes the operation of this patent quieter and more suitable for use in quiet places such as libraries.

[0031] 4. Compact structure and easy to manufacture

[0032] This patent highly integrates core components such as the limit adjustment rod and the elastic element within the limited space between the rear spine of the reading holder and the sliding connector, resulting in a compact structure. Furthermore, the elastic element can be integrally injection molded with the limit adjustment rod. This integrated design achieves key functions such as driving, resetting, and locking with a single part, which not only simplifies the assembly process and reduces the number of parts but also effectively controls production costs, demonstrating promising industrialization prospects.

[0033] 5. The human-computer interaction is reasonable and the operation is safe.

[0034] This patent precisely limits the travel of the limit adjustment rod by using a limit baffle and the upper edge of the reading holder, ensuring clear operating feel and feedback, while preventing component damage that may be caused by excessive pulling, thus improving the product's operational safety and overall durability. Attached Figure Description

[0035] The above content of this patent and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solution.

[0036] Figure 1 Exploded view of the height locking mechanism for the reading rack;

[0037] Figure 2 This is a schematic cross-sectional view of the reading rack in its first working state.

[0038] Figure 3 This is a schematic cross-sectional view of the reading rack in its second working state.

[0039] Figure 4 This is a schematic cross-sectional view of the limit adjustment rod in its first working state;

[0040] Figure 5 This is a schematic cross-sectional view of the limit adjustment rod in its second working state.

[0041] The reference numerals in the attached figures are explained as follows:

[0042] Reading shelf 1

[0043] Slide rail 11

[0044] 111 spring clip baffle

[0045] Limit baffle 112

[0046] Limit Adjustment Component 2

[0047] Operating handle 21

[0048] Elastic element 22

[0049] Sliding connector 3

[0050] rack 31 Detailed Implementation

[0051] The detailed features and advantages of this patent are described below in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this patent and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this patent.

[0052] This specification also uses several compound terms to describe devices, components, equipment, etc. that include more than one function, or to assign additional functions to a corresponding device, component, equipment, etc. Those skilled in the art will understand that such compound terms can be implemented by a single or multiple devices, components, equipment, etc., as long as they are reasonable under the interpretation rules of this patent terminology.

[0053] It should be noted that in this specification, similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and interpreted in subsequent figures. In this specification and claims, several terms will be used, and unless otherwise indicated, these terms will be defined as having the following meanings:

[0054] The terms “comprising” or “having” have the same meaning as “containing”, and also include other forms of the term, such as the gerund and singular forms in English, meaning including but not limited to, and not intended to exclude, for example, other elements, components, integers or steps.

[0055] All other terms used herein for special definition are intended to have the general meaning understood by one of ordinary skill in the art, and in particular, meaning that one of ordinary skill in the art, upon reading the claims, specification and drawings of this patent, can directly and without doubt determine how the technical solution of this patent can be implemented.

[0056] Even if there are incomplete descriptions, omissions, or ambiguities in the grammar, words, punctuation, graphics, symbols, etc. of the claims, specification, and drawings of this patent, a person skilled in the art can still arrive at the only correct understanding by reading the claims, specification, and drawings as a whole without extensive reasoning or experimentation, and effectively exclude various incorrect interpretations that are not aimed at achieving the purpose of this patent.

[0057] Those skilled in the art would first choose to read the claims, specification, and drawings of this patent to reasonably interpret the terms; secondly, they would choose to refer to the relevant definitions in other documents published by the applicant before the filing date to reasonably interpret the terms; thirdly, they would choose the references cited in this patent to reasonably interpret the terms; and finally, they would choose to combine the technical dictionaries, technical manuals, reference books, textbooks, national or industry technical standards, etc., commonly used by those skilled in the art to reasonably interpret the terms.

[0058] All references cited in this application are incorporated herein by way of quotation, to the extent that they do not contradict the disclosure herein. It will be apparent to those skilled in the art that products (apparatus, components, devices, compounds, compositions, materials, etc.) and methods (processes, steps, conditions, parameters, equipment, and test methods, equipment, etc.) not specifically described herein can be applied to the implementation of the patented creation fully disclosed herein without the need for excessive experimentation. This patent is intended to cover all functional equivalents known in the art of the methods, apparatus, apparatus components, materials, processes, and techniques specifically described herein. All cited references include:

[0059] The following publications are included: Marks' Standard Handbook for Mechanical Engineers (11th edition and other editions prior to the filing date of this application), published by McGraw-Hill, Inc.; DeGarmo's Materials and Processes in Manufacturing (13th edition and other editions prior to the filing date of this application), published by Wiley; Oberg's Machine Handbook (32nd edition and other editions prior to the filing date of this application), published by IndustrialPress Inc.; Cheng Daxian's Mechanical Design Handbook (6th edition and other editions prior to the filing date of this application), published by Chemical Industry Press; and Wen Bangchun's Modern Mechanical Design Handbook (6th edition and other editions prior to the filing date of this application), published by Machinery Industry Press.

[0060] It should be noted that, for ease of description and understanding, this patent document may use directional terms such as "left," "right," "up," "down," "axial," and "lateral." These terms are based on the orientation shown in the drawings or the relative positional relationships of the components in their normal use state, and should not be construed as an absolute limitation on the scope of protection of this invention. For those skilled in the art, in conjunction with the full text of the specification and the drawings, it can be understood that the essence of these directional descriptions is to clarify the relative connection and fit of the components. Therefore, any equivalent transformation of the orientation or position of components based on the essential concept of this invention should be included within the scope of protection of the claims of this patent.

[0061] The core of this patent lies in providing a convenient, reliable, quiet, and durable reading rack height locking mechanism. To achieve this, the invention creatively employs a limit adjustment lever that can be driven with one hand as a "switch." By changing the shape of its elastic element (opening or closing), the switching between the locked state and the free adjustment state is achieved. When locked, the elastic element is in a stress-free state, fundamentally improving its lifespan and reliability; during adjustment, the user only needs to squeeze the operating handle to achieve bidirectional stepless adjustment, greatly improving ease of use.

[0062] The following section will elaborate on the specific structure, connection relationship and working principle of each component, based on this core concept.

[0063] See Figure 1 The diagram shows an exploded view of the height locking mechanism. The height locking mechanism of the reading rack mainly consists of three parts: the reading rack 1, the limit adjustment rod 2, and the sliding connector 3.

[0064] The reading stand 1 serves as the main body, directly supporting the book. A slide rail 11 is located on its back near the central axis, forming the basic guide rail for the mechanism's movement. The slide rail 11 integrates a spring-loaded baffle 111 and a limiting baffle 112. Specifically, to ensure the book is stably placed when the reading stand is tilted and to prevent accidental slippage, this patent incorporates a special anti-slip and fixing design on the front side (book-bearing surface) of the reading stand body 1. As a preferred embodiment, soft anti-slip pads are pasted or embedded in the front frame and support area of ​​the reading stand body 1. For scenarios requiring higher stability, book clips can be optionally added to further enhance stability.

[0065] The sliding connector 3 serves as the connection interface between the entire mechanism and the external support (such as an adapter or posture corrector panel), and is typically hinged to it via an outer connector. Its inner side is equipped with a rack 31, which is preferably a ratchet rack with a one-way limiting function. As a preferred extension of this patent, the sliding connector 3 is further designed to be hinged to the external support. This allows the entire reading rack body 1 to rotate relative to the external support (such as a base or clamp) within a certain angular range. The height locking mechanism solves the vertical positioning problem, while the hinge mechanism 4 solves the pitch angle positioning problem. Both operate independently yet collaboratively, jointly achieving precise and stable positioning of the reading rack in two degrees of freedom in space.

[0066] Limit adjustment rod 2: It is movably disposed in the gap between the slide rail 11 and the sliding connector 3 of the reading rack 1. The upper end of the limit adjustment rod 2 is provided with an operating handle 21, and the lower part is provided with an integrally formed elastic element 22. In this embodiment, the elastic element 22 is specifically manifested as a figure-eight shaped spring sheet structure.

[0067] First working status:

[0068] See Figure 2 and Figure 4 . Figure 2 This shows a cross-sectional view of the entire mechanism in its first operational state. Figure 4 The focus then shifts to the details of the limit adjustment rod 2 in this state. In its natural state, i.e., when the user does not apply any operation, the mechanism is in its first working state. At this time, the downward movement range of the limit adjustment rod 2 is limited by the limit baffle 112 inside the slide rail 11. The limit baffle 112 supports the bottom of the limit adjustment rod 2, preventing it from falling further. In this position, the elastic element 22 on the limit adjustment rod 2 is in a freely open natural state, with its two claws extending outwards. Since it is not forcibly deformed, the elastic element 22 does not store elastic potential energy in this state. The claws of the open elastic element 22 form interference contact with any tooth surface of the rack 31 on the inner side of the sliding connector 3. When the user applies a downward force to the reading holder 1, the claws of the elastic element 22 will immediately lock onto the tooth surface of the rack 31, and the mechanical interference prevents downward movement, thereby achieving reliable locking.

[0069] When the user applies an upward force to the reading holder 1, the reading holder 1 can move upward. At this time, the claw design of the elastic element 22 allows it to overcome friction and undergo a slight inward elastic deformation, thus sliding along the back of the teeth of the rack 31 to achieve "stepless" lifting. After sliding over each tooth, the elastic element 22 instantly returns to its open state under its own elastic force, ready to interfere with the next tooth. This process allows the reading holder 1 to move smoothly upward in one direction, and also allows the reading holder 1 to stay at any suitable height until it reaches the upper limit of the physical stroke of the slide rail 11.

[0070] Second working state:

[0071] See Figure 3 and Figure 5 . Figure 3 This shows a cross-sectional view of the entire mechanism in its second working state. Figure 5 The deformation of the limiting adjustment rod 2 in this state is described in detail. When the user needs to lower the reading holder 1 or make a quick bidirectional adjustment, the mechanism needs to be switched to the second working state. The user lifts the limiting adjustment rod 2 upward by pinching the operating handle 21 with the upper edge of the reading holder 1 with the thumb and forefinger of one hand. The upward movement range of the limiting adjustment rod 2 is limited by the upper edge of the reading holder 1 to prevent it from being pulled out excessively. The pinching position is a human-computer interaction design for one-handed operation in this patent. It is not an independent part, but a specific and short-distance relative spatial relationship formed by the top of the operating handle 21 and the upper edge of the reading holder 1. As the limiting adjustment rod 2 is lifted, the gap between the operating handle 21 and the upper edge of the reading holder 1 decreases, that is, the pinching position itself closes simultaneously. At the same time, the elastic element 22 at its lower part rises and contacts the spring-loaded baffle 111. The inclined surface or contour of the snap-lock baffle 111 forcibly compresses the open elastic element 22, causing it to deform and the latch to retract inward, thus changing from an "open" state to a "closed" state. This process requires the user to apply force to overcome the elastic force of the elastic element 22, allowing it to store elastic potential energy. After the elastic element 22 closes, its latch disengages from the interference with the rack 31, releasing the one-way locking function. At this point, the user can freely drag the reading holder 1 up or down while maintaining the pinching action, allowing it to slide unimpeded to any desired height within its travel range.

[0072] State Reset

[0073] Once the reading holder 1 is adjusted to the appropriate height, the user releases their gripping fingers. The limiting adjustment rod 2 falls downwards under the combined action of gravity and the potential energy of the elastic element 22. During this descent, the elastic element 22 slides along the surface of the snap-on baffle 111, releasing its stored elastic potential energy and gradually restoring its shape. When the limiting adjustment rod 2 finally falls back onto the limiting baffle 112, the elastic element 22 completely disengages from the control of the snap-on baffle 111, resetting to its freely open natural state and re-engaging with the nearest tooth surface on the rack 31. The mechanism automatically returns to its first working state, securely locking the reading holder 1 at the new height.

[0074] Although a preferred embodiment has been described above, the scope of protection of this patent is not limited thereto. Those skilled in the art can make various modifications and variations without departing from the principles of this invention.

[0075] The inclined design of the spring-loaded baffle 111 smoothly guides the claw of the elastic element 22 from the open to the closed state. This gradual contact method avoids rigid impact, making the deformation process more stable and smooth, effectively improving the operating feel, reducing wear, and preventing noise. When the user releases the operating handle 21 and the limit adjustment rod 2 falls, the elastic element 22 will slide along this inclined surface again. The inclined surface at this time plays a guiding and resetting role, allowing the stored elastic potential energy to be released smoothly. In other optional embodiments, the inclined surface of the spring-loaded baffle 111 can be replaced with other contours with equivalent guiding functions, such as arc surfaces or stepped curved surfaces, as long as they can achieve the function of forcing the elastic element 22 to smoothly transition from the open to the closed state, they are all within the protection scope of this patent.

[0076] Regarding the elastic element 22: its shape is not limited to a figure-eight shape; any elastic structure capable of switching between "free opening" and "controlled closing" states, such as a V-shaped, U-shaped, M-shaped, Ω-shaped, or wave-shaped element with a central protrusion, is acceptable. Furthermore, this elastic element can be a single part integrally formed with the limiting adjustment rod 2, or it can be a composite of components made of different materials or with different heat treatment states. For example, a metal elastic element can be embedded in the plastic body of the limiting adjustment rod 2. Besides a single structure, the elastic element can also be a structure composed of multiple components, such as one or more swing arms rotating around an axis. The swing arms apply torque through a torsion spring, causing their ends to have a continuous outward opening tendency. In short, any structure that, through its specific geometry, can cause at least one claw or contact point to open outward in its natural state and retract inward after being compressed falls into this category.

[0077] Regarding the driving method: In addition to the "lifting up" method, the limit adjustment rod 2 can also be driven by pressing, rotating, or flicking. For example, the operating handle 21 can be designed as a button, which pushes a ramp mechanism by pressing down or inward, forcing the elastic element 22 to close.

[0078] Regarding the limiting method: The limiting function of the limiting baffle 112 and the upper edge of the reading rack 1 on the limiting adjustment rod 2 can also be achieved by the protrusion of the limiting adjustment rod 2 itself and the groove on the slide rail 11 or any structure that can interfere with each other.

[0079] Regarding materials: The elastic element 22 can be integrally injection molded with the limit adjustment rod 2, preferably using engineering plastics such as nylon and POM; it can also be connected to the limit adjustment rod 2 as an independent metal spring through assembly. Among them, nylon has excellent impact strength, fatigue resistance, wear resistance and good mechanical properties; POM has excellent low friction properties, making the operation smoother and less strenuous, while further eliminating the "squeaking" noise caused by friction.

[0080] Industrial application

[0081] Compared with existing technologies, the locking structure provided by this patent, through its unique mechanical structure and the synergistic effect between components, brings significant and multifaceted technical benefits, specifically reflected in:

[0082] 1. Enables convenient one-handed full-function operation.

[0083] This patented design creates a short-distance pinching position between the operating handle and the upper edge of the reading holder, allowing users to lift the limit adjustment rod, release the lock, and adjust the height with just one-handed pinching motion. The lock automatically returns to its original position upon release. This solves the problem of traditional mechanisms requiring two hands (one hand to press and release, the other to lower the support), significantly improving the convenience and efficiency of adjustment.

[0084] 2. Improved the reliability and service life of the locking mechanism.

[0085] The elastic element used in this patent is in a freely open state when locked and does not store elastic potential energy. This design avoids the problem of material fatigue or permanent deformation caused by long-term stress in traditional "normally closed" elastic elements, thereby significantly improving the long-term reliability of locking and extending the service life of the mechanism.

[0086] 3. Effectively reduced operating noise

[0087] This patent achieves multi-stage noise reduction in its structure. First, since the elastic element is not under force when locked, the inherent noise generated by continuous compression is eliminated. Second, during height adjustment, the elastic element only contacts and deforms against the spring-loaded baffle at the moment of unlocking, avoiding the "clicking" sound produced by continuous scraping and impact between the elastic element and the rack and pinion during the entire adjustment process, similar to traditional structures. This makes the operation of this patent quieter and more suitable for use in quiet places such as libraries.

[0088] 4. Compact structure and easy to manufacture

[0089] This patent highly integrates core components such as the limit adjustment rod and the elastic element within the limited space between the rear spine of the reading holder and the sliding connector, resulting in a compact structure. Furthermore, the elastic element can be integrally injection molded with the limit adjustment rod. This integrated design achieves key functions such as driving, resetting, and locking with a single part, which not only simplifies the assembly process and reduces the number of parts but also effectively controls production costs, demonstrating promising industrialization prospects.

[0090] 5. The human-computer interaction is reasonable and the operation is safe.

[0091] This patent precisely limits the travel of the limit adjustment rod by using a limit baffle and the upper edge of the reading holder, ensuring clear operating feel and feedback, while preventing component damage that may be caused by excessive pulling, thus improving the product's operational safety and overall durability.

[0092] In summary, this patent is a comprehensive solution that integrates convenient operation, superior stability, economic cost, safety, reliability, and health benefits. Its technical effects are significant and its market prospects are broad.

[0093] The terminology and expressions used herein are for descriptive purposes only and this patent should not be limited to these terms and expressions. The use of these terms and expressions does not imply the exclusion of any illustrative and descriptive equivalent features (or parts thereof), and it should be recognized that various possible modifications should also be included within the scope of the claims. Other modifications, variations, and substitutions may also exist. Accordingly, the claims should be considered to cover all such equivalents.

[0094] Similarly, it should be noted that although this patent has been described with reference to the specific embodiments described above, those skilled in the art should recognize that the above embodiments are only used to illustrate this patent, and various equivalent changes or substitutions can be made without departing from the spirit of this patent. Therefore, any changes or modifications to the above embodiments within the essential spirit of this patent will fall within the scope of the claims of this patent.

Claims

1. A reading rack height locking mechanism, comprising: The main body of the reading shelf used to hold books; A sliding connector for mounting on an external support and slidably connecting to the reading rack body via its rear spine to allow for height adjustment; Its features are: It also includes a limiting adjustment rod, which is movably disposed between the rear spine of the reading rack and the sliding connector; the limiting adjustment rod is provided with an elastic element, and the inner side of the sliding connector is provided with a rack that cooperates with the elastic element; The limit adjustment rod has a first working state and a second working state: In the first working state, the elastic element opens under its own elastic force, forming a one-way interference with the rack, restricting the downward movement of the reading rack body while allowing it to move upward; In the second working state, by driving the limit adjustment rod, the elastic element is overcome by its own elastic force and closed, thereby breaking away from the interference with the rack and allowing the main body of the reading rack to move freely up and down.

2. The height lock mechanism according to claim 1, characterized in that The rear spine of the reading rack body is provided with a slide rail, the sliding connector is slidably connected to the slide rail, and the limiting adjustment rod is installed between the slide rail and the sliding connector.

3. The height lock mechanism according to claim 2, characterized in that The slide rail is equipped with a limiting baffle to restrict the downward movement range of the limiting adjustment rod; the upper edge of the reading rack body is used to restrict the upward movement range of the limiting adjustment rod.

4. The height lock mechanism according to claim 2, wherein The slide rail is equipped with a spring-loaded baffle; when the limit adjustment rod is driven, the elastic element interacts with the spring-loaded baffle, thereby being controlled to deform to a closed state.

5. The height lock mechanism according to claim 1, wherein The top of the limiting adjustment rod is provided with an operating handle, and the operating handle forms a pinch position with the upper edge of the reading rack body.

6. The height locking mechanism according to claim 5, characterized in that, The limiting adjustment rod is driven by lifting it upward through the pinch position.

7. The height locking mechanism according to claim 1, characterized in that, The elastic element is a V-shaped, U-shaped, or figure-eight shaped integrally molded spring sheet, with two claws at its open end that can engage with the rack.

8. The height lock mechanism according to any one of claims 1 to 7, characterized in that The elastic element is in a free state and has no elastic potential energy in the open state of the first working state; in the closed state of the second working state, it stores elastic potential energy due to deformation.

9. The height lock mechanism according to claim 1, wherein The rack is a ratchet rack, and its teeth are configured to allow the elastic element to pass over in one direction when the elastic element is in the open state.

10. The height lock mechanism of claim 7, wherein The elastic element is made of engineering plastic.

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