Length-adjusting bracket and movable study table

Abstract

The present invention provides a length adjustment bracket and a movable study table, wherein the length adjustment bracket comprises a retractable connection member, and a first clamping member and a second clamping member; the retractable connection member comprises two parallel mother rods, two parallel child rods, and two adjustment locks arranged in the mother rods; one end of the two child rods is respectively inserted into the two mother rods, the child rods are slidably connected to the mother rods, and one end of the two child rods inserted into the mother rods is respectively connected to the two adjustment locks, and the adjustment locks are used to lock the mother rods and the child rods; the adjustment switch of the adjustment lock is integrated with the second clamping member. The length adjustment bracket provided by the present invention can be connected to ordinary desks of different sizes without damaging the desktop of the ordinary desk, thereby expanding the scope of use of the length adjustment bracket.

Description

Technical Field

[0001] The present invention relates to the technical field of learning tools, and in particular to a length-adjusting bracket and a movable learning table. Background Art

[0002] The study table is a new and scientific learning auxiliary tool. Compared with the traditional desk, the desktop of the study table is more in line with the characteristics of ergonomics and human body mechanics, and is more helpful for users to maintain a correct and comfortable reading and writing posture.

[0003] The desktops of ordinary desks are mostly long strips of board. The desktops of ordinary desks do not have the ergonomic and biomechanical characteristics of study desks, and therefore are not conducive to users maintaining a correct and comfortable reading and writing posture.

[0004] For some families who have already purchased ordinary desks, if they purchase a study table separately, on the one hand, placing the study table separately will further reduce the indoor usable area, and on the other hand, purchasing the study table will make the original desk idle, causing waste. For this reason, there are currently movable study tables on the market that are suitable for installation on ordinary desks. Such movable study tables usually include a bracket and a desktop connected to the bracket. By connecting the bracket to the desktop of the ordinary desk, the ordinary desk can be changed into a study table suitable for children.

[0005] However, since ordinary desks have various sizes and specifications, in order to make the movable study table suitable for ordinary desks of various sizes and specifications, the bracket of the movable study table is currently usually connected to the desktop of the ordinary desk by screws, thereby causing damage to the desktop of the ordinary desk during the connection process. Summary of the invention

[0006] The technical problem solved by the present invention is that the bracket of the current movable study table may damage the desktop of the ordinary desk during the process of being connected with the ordinary desk.

[0007] In order to solve the above problems, the present invention provides a length-adjusting bracket, comprising a telescopic connecting member, and a first clamping member and a second clamping member respectively connected to two ends of the telescopic connecting member;

[0008] The telescopic connector includes two parallel mother rods, two parallel child rods, and two adjustment locks disposed in the mother rods;

[0009] The first clamping member is connected to the outer ends of the two mother rods, and the second clamping member is connected to the outer ends of the two child rods;

[0010] One end of the two sub-rods is inserted into the two mother rods respectively, the sub-rods are slidably connected to the mother rods, and one end of the two sub-rods inserted into the mother rods is connected to the two adjustment locks respectively, and the adjustment locks are used to lock the mother rods and the sub-rods;

[0011] The adjustment switch of the adjustment lock is integrated with the second clamping member.

[0012] Optionally, a plurality of positioning holes are provided at the upper end of the mother rod; the adjustment lock includes an adjustment structure and a positioning protrusion provided on the adjustment structure, the adjustment structure is connected to the adjustment switch, the positioning protrusion is adapted to the positioning hole, and the positioning protrusion can be lifted and lowered under the drive of the adjustment structure.

[0013] Optionally, the adjustment switch includes an adjustment slide rod and a switch button, one end of the adjustment slide rod is connected to the adjustment structure, and the other end is connected to the switch button; the adjustment slide rod is arranged in the sub-rod.

[0014] Optionally, the retractable connecting member also includes a first support rod, the two sub-rods are respectively vertically connected to the two ends of the first support rod, and the first support rod is located at the outer end of the sub-rod; the adjusting slide rod includes two parallel adjusting push rods, and a linkage slide rod vertically connected to the two adjusting push rods, and the linkage slide rod is arranged in the first support rod; the switch button is arranged above the first support rod, and the switch button is connected to the linkage slide rod.

[0015] Optionally, a first through hole is provided on the first support rod, and a fastener passes through the first through hole to connect the switch button with the linkage slide rod; the inner diameter of the first through hole is larger than the outer diameter of the fastener, so that the switch button can move in the horizontal direction.

[0016] Optionally, a second through hole matched with the linkage slide bar is provided on the sub-rod, and the length of the second through hole is greater than the thickness of the linkage slide bar, so that the linkage slide bar can move horizontally in the second through hole.

[0017] Optionally, both ends of the second clamping member are provided with connecting rods adapted to the sub-rod, and the connecting rods are suitable for being inserted into the sub-rod so as to be slidably connected to the sub-rod; the second clamping member is also connected to the first support rod through an adjusting bolt.

[0018] Optionally, an adjustment cylinder is provided in the first support rod, and an internal thread matching the adjustment bolt is provided in the adjustment cylinder; a third through hole suitable for the adjustment cylinder to pass through is provided on the linkage slide rod, and the inner diameter of the third through hole is larger than the outer diameter of the adjustment cylinder; the adjustment bolt passes through the adjustment cylinder and is fixedly connected to the second clamping member.

[0019] Optionally, the telescopic connecting member further includes a second support rod, and two ends of the second support rod are respectively vertically connected to the two mother rods.

[0020] Another object of the present invention is to provide a movable study table, comprising the length adjustment bracket as described above, and a movable tabletop connected to the length adjustment bracket.

[0021] Compared with the prior art, the length adjustment bracket provided by the present invention has the following advantages:

[0022] The length adjustment bracket provided by the present invention can be connected to ordinary desks of different sizes without damaging the desktop of the ordinary desk, thereby expanding the use range of the length adjustment bracket by relatively arranging the first clamping member and the second clamping member at both ends of the retractable connecting member. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A simplified structural diagram of the length adjustment bracket of the present invention;

[0024] Figure 2 A cross-sectional view of the long queue adjustment bracket of the present invention;

[0025] Figure 3 A simplified structural diagram of the adjustment lock of the present invention;

[0026] Figure 4 An exploded view of the sub-rod, the regulating switch and the second clamping member of the present invention;

[0027] Figure 5 This is an assembly diagram of the sub-rod, the regulating switch and the second clamping member described in the present invention.

[0028] Description of reference numerals:

[0029] 1-retractable connector; 11-mother rod; 111-positioning hole; 12-sub-rod; 121-second through hole; 13-adjusting lock; 131-lock shell; 1311-limiting hole; 1312-upper lock shell; 1313-lower lock shell; 1314-front baffle; 1315-rear baffle; 1316-first groove; 1317-second groove; 1318-lock inner shell; 132-positioning protrusion; 133-adjusting slide rod; 1331-adjusting push rod; 1332-linking slide rod; 1333-third through hole; 134-switch button; 135-upper and lower Sliding pin; 1351-sliding hole; 1352-first ball; 1353-second ball; 136-smooth pin; 137-smooth block; 138-baffle; 139-spring; 14-first support rod; 141-first through hole; 142-adjusting cylinder; 15-second support rod; 2-first clamping member; 3-second clamping member; 31-first clamping layer; 32-second clamping layer; 321-abutment plate; 322-fourth through hole; 323-fifth through hole; 33-third clamping layer; 34-inclined surface; 35-rivet; 36-connecting rod; 4-adjusting bolt. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In addition, the terms "first" and "second" are only used to simplify the description and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" the first feature may include that the first feature is in direct contact with the second feature, or may include that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] In order to solve the problem that the bracket of the movable study table currently used on the ordinary desk will damage the desktop of the ordinary desk during the connection process with the ordinary desk, the present invention provides a length adjustment bracket, see Figure 1 , Figure 2 As shown, the length adjustment bracket includes a telescopic connecting member 1, and a first clamping member 2 and a second clamping member 3 respectively connected to the two ends of the telescopic connecting member 1, and the desktop of the ordinary desk is clamped from two opposite directions by the first clamping member 2 and the second clamping member 3 respectively to achieve connection with the ordinary desk; since the first clamping member 2 and the second clamping member 3 are respectively connected to the two ends of the telescopic connecting member 1, the distance between the first clamping member 2 and the second clamping member 3 can be adjusted by the telescopic movement of the telescopic connecting member 1, so that the length adjustment bracket provided in the present application can be connected to ordinary desks with different sizes without damaging the desktop of the ordinary desk.

[0036] The retractable connecting member 1 includes two parallel mother rods 11, two parallel child rods 12, and two adjustment locks 13 arranged in the mother rods 11; the first clamping member 2 is connected to the outer ends of the two mother rods 11, and the second clamping member 3 is connected to the outer ends of the two child rods 12; in the present application, the outer end of the mother rod 11 specifically refers to the end of the mother rod 11 away from the clamped ordinary desk desktop; similarly, the outer end of the child rod 12 specifically refers to the end of the child rod 12 away from the clamped ordinary desk desktop.

[0037] One end of the two sub-rods 12 is respectively inserted into the two mother rods 11, that is, each mother rod 11 has a sub-rod 12 inserted therein, the sub-rod 12 is slidably connected to the corresponding mother rod 11, and one end of the two sub-rods 11 inserted into the mother rod 11 is respectively connected to two adjustment locks 13, which are used to lock the mother rod 11 and the sub-rod 12.

[0038] During use, the adjustment lock 13 can be unlocked so that the mother rod 11 and the sub-rod 12 located in the mother rod 11 are released from the lock. The unlocked sub-rod 12 can slide in the mother rod 11. While the sub-rod 12 slides, the length of the sub-rod 12 inserted into the mother rod 11 is adjusted, and then the length between the outer end of the mother rod 11 and the outer end of the sub-rod 12 is adjusted, that is, the distance between the first clamping member 2 and the second clamping member 3 is adjusted, and at the same time, the sub-rod 12 also drives the corresponding adjustment lock 13 to adjust the position; according to the size of the desktop of the ordinary desk being clamped, when the distance between the first clamping member 2 and the second clamping member 3 is adjusted to match the size of the desktop being clamped, the adjustment lock 13 is locked, and the mother rod 11 and the corresponding sub-rod 12 are locked, so that the length of the telescopic connecting member 1 remains unchanged, and then the desktop of the ordinary desk is clamped by the first clamping member 2 and the second clamping member 3.

[0039] Furthermore, in order to reduce the volume of the length adjustment bracket and facilitate the control of the length adjustment bracket, the present application preferably sets the adjustment switch of the adjustment lock at an outer end of the telescopic connecting member 1. The present application preferably sets the adjustment switch at the outer end of the sub-rod 12, so that the adjustment switch is arranged adjacent to the second clamping member 3, and further the adjustment switch of the adjustment lock 13 is integrated with the second clamping member 3.

[0040] The length adjustment bracket provided by the present invention, by relatively arranging the first clamping member 2 and the second clamping member 3 at the two ends of the retractable connecting member 1, enables the length adjustment bracket to be connected to ordinary desks of different sizes without damaging the desktop of the ordinary desk, thereby expanding the application range of the length adjustment bracket.

[0041] In order to lock the mother rod 11 and the corresponding sub-rod 12 through the adjustment lock 13, a plurality of positioning holes 111 are provided at the upper end of the mother rod 11 in the present application; the adjustment lock 13 includes an adjustment structure and a positioning protrusion 132 provided on the adjustment structure, the adjustment structure is connected to the adjustment switch, the positioning protrusion 132 is adapted to the positioning hole 111, and the positioning protrusion 132 can be lifted and lowered under the drive of the adjustment structure.

[0042] During use, the adjustment switch is operated to drive the adjustment structure to move. When the adjustment structure moves, the positioning protrusion 132 provided on the adjustment structure is driven to move up and down to achieve the locking and unlocking operation of the adjustment lock 13.

[0043] For the present application, since the positioning hole 111 is arranged at the upper end of the mother rod 11, and the adjustment lock 13 is arranged in the mother rod 11, when the adjustment structure drives the positioning protrusion 132 to move upward, the positioning protrusion 132 is inserted into the corresponding positioning hole 111 on the mother rod 11, so that the sub-rod 12 and the mother rod 11 cannot slide relative to each other, thereby realizing the locking between the mother rod 11 and the sub-rod 12; on the contrary, when the adjustment structure drives the positioning protrusion 132 to move downward, the positioning protrusion 132 disengages from the corresponding positioning hole 111, so that the sub-rod 12 and the mother rod 11 can slide relative to each other, thereby realizing the unlocking of the mother rod 11 and the sub-rod 12.

[0044] The specific structure of the adjustment structure in the present application depends on the type of the adjustment lock 13; the adjustment lock 13 in the present application can be any adjustment lock structure in the prior art that can lock and unlock the mother rod 11 and the child rod 12; in order to facilitate the adjustment of the length of the telescopic connector 1, see Figure 3 As shown, the adjustment lock 13 in the present application also includes a lock shell 131, wherein the adjustment structure is arranged in the lock shell 131, and a limiting hole 1311 adapted to the positioning protrusion 132 is arranged on the lock shell 131, and the positioning protrusion 132 can pass through the limiting hole 1311 to perform lifting and lowering movements.

[0045] Specifically, the adjustment structure in the present application includes an upper and lower sliding pin 135, a smooth pin 136 and a smooth block 137. The upper and lower sliding pin 135 is a block structure. The positioning protrusion 132 is arranged on the upper and lower sliding pin 135. The upper and lower sliding pin 135 is arranged in the lock shell 131, and a gap is arranged between the lower end of the upper and lower sliding pin 135 and the lock shell 131, wherein the upper and lower sliding pin 135 is provided with a long strip of sliding hole 1351, and the sliding hole 1351 is inclined in the upper and lower sliding pin 135. The smooth pin 136 is arranged in the sliding hole 1351, and both ends of the smooth pin 136 are connected to the smooth block 137. The smooth block 137 is used to drive the smooth pin 136 to move in the horizontal direction. At the same time, the smooth block 137 is connected to the adjustment switch, so that when the adjustment switch is operated, the smooth block 137 can be driven to move. When the smooth block 137 moves, it drives the smooth pin 136 to move in the horizontal direction.

[0046] In the present application, the sliding hole 1351 is tilted in the upper and lower sliding pins 135, which specifically means that the sliding hole 1351 is tilted along its own length direction, so that when the adjustment lock 13 is placed horizontally, the distances between the first and last ends of the sliding hole 1351 in the length direction and the lock shell 131 located below it are different, that is, the heights of the first and last ends of the sliding hole 1351 in the length direction are different; when the smooth block 137 drives the smooth pin 136 to move in the horizontal direction, if the smooth pin 136 moves from the lower end to the higher end of the sliding hole 1351, as the smooth pin 136 moves, the smooth pin 136 squeezes the bottom of the sliding hole 1351, causing the upper and lower sliding pins 135 to move downward. When the sub-rod 12 is slid in the mother rod 11, the length of the telescopic connector 1 is adjusted. After the adjustment is completed, the smooth block 137 drives the smooth pin 136 to move horizontally from the high end of the sliding hole 1351 to the low end. The smooth pin 136 no longer exerts pressure on the bottom of the sliding hole 1351. The position of the upper and lower sliding pins 135 moves upward, and at the same time drives the positioning protrusion 132 to rise, so that the positioning protrusion 132 is inserted into the corresponding positioning hole 111, and the sub-rod 12 is locked with the mother rod 11.

[0047] The lock shell 131 in the present application includes an upper lock shell 1312 and a lower lock shell 1313, the upper lock shell 1312 is connected to the lower lock shell 1313, and a space for accommodating an adjustment structure is formed inside the upper outer lock shell 1312; the upper and lower sliding pins 135 can be abutted by the lock shell 131, so that a gap is set between the lower ends of the upper and lower sliding pins 135 and the lower outer lock shell 1313 located below; in the present application, a front baffle plate 1314 and a rear baffle plate 1315 are set on the lower lock shell 1313, and the upper and lower sliding pins 135 are set between the front baffle plate 1314 and the rear baffle plate 1315, so that a gap is set between the lower parts of the upper and lower sliding pins 135 and the lower lock shell 1313 through the abutment between the front baffle plate 1314 and the rear baffle plate 1315; further, A first ball 1352 is provided at the front end of the pin 135, i.e., the end adjacent to the front baffle 1314, and a first groove 1316 matched with the first ball 1352 is provided on the front baffle 1314. The first ball 1352 rolls in the first groove 1316 to reduce the friction between the upper and lower sliding pins 135 and the front baffle 1314 during the up and down movement. Similarly, a second ball 1353 is provided at the rear end of the upper and lower sliding pins 135, i.e., the end adjacent to the rear baffle 1315, and a second groove 1317 is provided on the rear baffle 1315. The second ball 1353 rolls in the second groove 1317 to reduce the friction between the upper and lower sliding pins 135 and the rear baffle 1315 during the up and down movement, thereby reducing the difficulty of adjustment and reducing the wear during the adjustment process.

[0048] In order to enable the adjustment lock 13 to be automatically locked, the adjustment lock 13 also includes a baffle 138 and a spring 139. The baffle 138 is connected to the second ball 1353. One end of the spring 139 is connected to the baffle 138, and the other end is connected to the smooth block 137. In the process of unlocking the adjustment lock 13, the smooth block 137 drives the smooth pin 136 to move horizontally from the lower end to the higher end of the slide hole 1351. In this process, the spring 139 is squeezed or stretched. The length adjustment of the telescopic connector 1 is completed. After completion, release the adjustment switch, the smooth block 137 is no longer subjected to the external force applied by the adjustment switch, and the spring 139 returns to its original shape. During the recovery process, the spring 139 pushes or pulls the smooth block 137 to move in the direction opposite to the moving direction during the unlocking process, and at the same time drives the smooth pin 136 to move horizontally from the high end to the low end of the sliding hole 1351, and the upper and lower sliding pins 135 move up, and at the same time drives the position of the positioning protrusion 132 to move up, so that the positioning protrusion 132 is inserted into the corresponding positioning hole 111, thereby realizing automatic locking.

[0049] Furthermore, the lock shell 131 also includes a lock inner shell 1318 with a frame-like structure, and the lock inner shell 1318 is arranged above the lower lock outer shell 1313, and the front baffle 1314, the rear baffle 1315 and the adjustment structure are all arranged in the lock inner shell 1318, so as to further improve the stability of the adjustment lock 13 structure by setting the lock inner shell 1318.

[0050] See also Figure 4 , Figure 5 As shown, the adjustment switch in the present application includes an adjustment slide rod 133 and a switch button 134. One end of the adjustment slide rod 133 is connected to the adjustment structure. Specifically, in the present application, one end of the adjustment slide rod 133 is connected to the smooth block 137; the other end of the adjustment slide rod 133 is connected to the switch button 134; the adjustment slide rod 133 is arranged in the sub-rod 12.

[0051] During the adjustment process, by pressing the switch button 134, a thrust can be generated on the adjustment slide rod 133, and then the adjustment slide rod 133 generates a thrust on the adjustment structure connected to it, that is, for the present application, a thrust is generated on the smooth block 137. Under the action of this thrust, the adjustment structure drives the positioning protrusion 132 to move downward and disengage from the positioning hole 111 to achieve unlocking; after releasing the switch button 134, the adjustment structure is no longer subjected to the thrust applied by the adjustment slide rod 133, and the adjustment structure drives the positioning protrusion 132 to move upward and insert into the corresponding positioning hole 111 to achieve locking.

[0052] The switch button 134 can be set at any position that is convenient for operation. In order to realize the integrated design of the adjustment switch and the second clamping member 3, the present application preferably sets the switch button 134 on the sub-rod 12 close to the second clamping member 3.

[0053] In order to facilitate the integrated design of the adjustment switch and the second clamping member 3, the retractable connecting member 1 in the present application also includes a first support rod 14, and the two sub-rods 12 are respectively vertically connected to the two ends of the first support rod 14. The first support rod 14 is located at the outer end of the sub-rod 12, that is, at the end of the sub-rod 12 away from the clamped ordinary desk desktop, adjacent to the second clamping member 3; the adjustment slide rod 133 includes two parallel adjustment push rods 1331, and a linkage slide rod 1332 vertically connected to the two adjustment push rods 1331. The two adjustment push rods 1331 are respectively located at the two ends of the linkage slide rod 1332, the two adjustment push rods 1331 are respectively arranged in the two sub-rods 12, and the two adjustment push rods 1331 are respectively connected to the adjustment structures of the two adjustment locks 13. For this application, the two adjustment push rods 1331 are respectively connected to the two smooth blocks 137; the linkage slide rod 1332 is arranged in the first support rod 14; the switch button 134 is arranged above the first support rod 14, and the switch button 134 is connected to the linkage slide rod 1332.

[0054] By pressing the switch button 134, a thrust from the second clamping member 3 toward the clamped object or a pulling force from the clamped object toward the second clamping member 3 is applied to the linkage slide bar 1332. The linkage slide bar 1332 simultaneously generates a thrust or a pulling force on the two adjustment push rods 1331 connected thereto. The two adjustment push rods 1331 simultaneously push the two adjustment structures to perform thrust or pulling force to achieve unlocking.

[0055] For the adjustment lock 13 provided in the present application, when the end of the sliding hole 1351 close to the second clamping member 3 is the lower end, unlocking is achieved in the process of the adjusting push rod 1331 applying a pushing force to the adjusting structure; on the contrary, when the end of the sliding hole 1351 away from the second clamping member 3 is the lower end, unlocking is achieved in the process of the adjusting push rod 1331 applying a pulling force to the adjusting structure.

[0056] The first support rod 14 is provided to improve the structural stability of the telescopic connector 1 on the one hand, and to control the two adjustment locks 13 simultaneously through a switch button 134 on the other hand, thereby ensuring that both sides of the telescopic connector 1 are adjusted synchronously during the adjustment process, thereby avoiding the situation where both sides of the telescopic connector 1 are tilted after adjustment.

[0057] In order to connect the switch button 134 with the linkage slide rod 1332, a first through hole 141 is provided on the first support rod 14, and a fastener passes through the first through hole 141 to connect the switch button 134 with the linkage slide rod 1332, and the inner diameter of the first through hole 141 is larger than the outer diameter of the fastener, so that the switch button 134 can move in the horizontal direction.

[0058] That is, the upper end of the fastener is fixedly connected to the switch button 134, and the lower end is fixedly connected to the linkage slide rod 1332. When the switch button 134 is pressed in the horizontal direction, the switch button 134 applies corresponding pushing force or pulling force to the linkage slide rod 1332 through the fastener to achieve unlocking.

[0059] Similarly, a second through hole 121 adapted to the linkage slide bar 1332 is provided on the sub-rod 12 , and the length of the second through hole 121 is greater than the thickness of the linkage slide bar 1332 , so that the linkage slide bar 1332 can move horizontally in the second through hole 121 .

[0060] To facilitate connecting the second clamping member 3 with the sub-rod 12, connecting rods 31 compatible with the sub-rod 12 are provided at both ends of the second clamping member 3, and the connecting rods 31 are suitable for being inserted into the sub-rod 12 so that the connecting rod 31 and the sub-rod 12 are slidably connected; to further increase the connection strength between the second clamping member 3 and the sub-rod 12, the second clamping member 3 is also connected to the first support rod 14 through an adjusting bolt 4.

[0061] By setting a first support rod 14, setting a linkage slide rod 1332 of the adjustment lock 13 in the first support rod 14, setting a switch button 134 above the first support rod 14, and further realizing the connection between the telescopic connecting member 1 and the second clamping member 3 through the first support rod 14, the integrated design of the adjustment switch of the adjustment lock 13 and the second clamping member 3 is realized, thereby improving the compactness of the length adjustment bracket structure, reducing the volume, and facilitating operation.

[0062] Specifically, an adjusting cylinder 142 is provided in the first support rod 14, and the adjusting cylinder 142 is fixedly connected to the first support rod 14; an internal thread compatible with the adjusting bolt 4 is provided in the adjusting cylinder 142; a third through hole 1333 suitable for the adjusting cylinder 142 to pass through is provided on the linkage slide rod 1332, and the inner diameter of the third through hole 1333 is larger than the outer diameter of the adjusting cylinder 142, so that the operation of the adjusting lock 13 and the operation of the second clamping member 3 do not interfere with each other; the adjusting bolt 4 passes through the adjusting cylinder 142 and is fixedly connected to the second clamping member 3, that is, the end of the adjusting bolt 4 adjacent to the second clamping member 3 is fixedly connected to the second clamping member 3, and the fixed connection method can be welding, etc.

[0063] By setting the adjusting bolt 4 and the adjusting cylinder 142, the distance between the first clamping member 2 and the second clamping member 3 can also be fine-tuned, so that the distance between the first clamping member 2 and the second clamping member 3 is more adapted to the size of an ordinary desk desktop, thereby further improving the stability of the connection between the length adjustment bracket and the ordinary desk desktop.

[0064] The specific fine-tuning process is to first make a preliminary adjustment to the distance between the first clamping member 2 and the second clamping member 3 by adjusting the lock 13 according to the size of the ordinary desk surface being clamped, and then drive the second clamping member 3 to move away from the sub-rod 12 or close to the sub-rod 12 by rotating the adjusting bolt 4, thereby further increasing or decreasing the distance between the first clamping member 2 and the second clamping member 3 to complete the fine-tuning.

[0065] The first clamping member 2 and the second clamping member 3 in the present application can both be any form of clamping structure in the prior art; the present application preferably comprises a first clamping layer 31, a second clamping layer 32, and a third clamping layer 33 arranged in sequence from the outside to the inside; from the outside to the inside in the present application specifically refers to from the side away from the sub-pole 12 to the side close to the sub-pole 12; the third clamping layer 33 is embedded in the second clamping layer 32, and the third clamping layer 33 is in contact with the desktop of the clamped ordinary desk; the first clamping layer 31 is slidably connected to the second clamping layer 32; the friction between the first clamping layer 31 and the second clamping layer 32 is less than the friction between the third clamping layer 33 and the desktop of the clamped ordinary desk; the lower end of the first clamping layer 31 is in contact with the lower end of the second clamping layer 32 through an inclined surface 34; the inclined surface 34 gradually approaches the desktop of the clamped ordinary desk from top to bottom.

[0066] The included angle between the inclined surface 34 and the vertical surface is 10° to 20°, preferably 15°.

[0067] In the present application, the material of the first clamping layer 31 is preferably metal, the material of the second clamping layer 32 is engineering plastic, and further preferably the engineering plastic is PC engineering plastic; the material of the third clamping layer 33 is rubber.

[0068] Furthermore, a contact plate 321 is provided on the second clamping layer 32 and is arranged parallel to the upper surface of the desktop of the clamped common desk. The contact plate 321 contacts the upper surface of the desktop of the clamped common desk.

[0069] The first clamping layer 31 and the second clamping layer 32 are loosely fitted by rivets 35 . The loose fitting in the present application specifically means that the first clamping layer 31 and the second clamping layer 32 are connected by rivets 35 , and relative sliding can occur between the first clamping layer 31 and the second clamping layer 32 .

[0070] Specifically, a fourth through hole 322 is provided on the second clamping layer 32, and the rivet 35 passes through the fourth through hole 322 to be connected to the first clamping layer 31; to achieve a loose fit, the inner diameter of the fourth through hole 324 is larger than the outer diameter of the connecting column on the rivet 35, so that the first clamping layer 31 and the second clamping layer 32 can only slide relative to each other in the vertical plane, and cannot be separated in other directions, such as the horizontal direction.

[0071] In order to ensure that the first clamping layer 31 and the second clamping layer 32 can slide, a fifth through hole 323 is also provided on the second clamping layer 32 in the present application, and the inner diameter of the fifth through hole 323 is larger than the outer diameter of the adjusting tube 142, so that after the adjusting tube 142 passes through the fifth through hole 323, the adjusting bolt 4 is connected to the first clamping layer 31, and the first clamping layer 31 and the second clamping layer 32 can slide within a certain range.

[0072] The second clamping member 3 provided in the present application, when an upward pulling force is applied to the length adjustment bracket having the second clamping member 3, since the first clamping layer 31 and the second clamping layer 32 are slidingly connected via the inclined surface 34, and the friction force between the first clamping layer 31 and the second clamping layer 32 is smaller than the friction force between the third clamping layer 33 and the clamped ordinary desk desktop, at this time, the relative position between the third clamping layer 33 and the clamped ordinary desk desktop remains unchanged, and a sliding tendency is generated between the first clamping layer 31 and the second clamping layer 32 at the inclined surface 34, which is distributed along the direction of the inclined surface 34 and points from the bottom to the top, that is, at A force is generated between the first clamping layer 31 and the second clamping layer 32 at the inclined surface 34, which is distributed in the direction of the inclined surface 34 and points from the bottom to the top. Since the inclined surface 34 gradually approaches the clamped ordinary desk desktop from top to bottom, the force generated at the inclined surface 34 will produce a component force pointing in the direction of the clamped ordinary desk desktop, so that the force applied by the second clamping member 3 on the clamped ordinary desk desktop is the sum of the pre-tightening force generated by the third clamping layer 33 on the clamped ordinary desk desktop and the component force generated at the inclined surface 34, thereby increasing the connection strength between the second clamping member 3 and the clamped ordinary desk desktop.

[0073] Furthermore, in order to improve the structural stability of the length adjustment bracket, the telescopic connector 1 in the present application also includes a second support rod 15, and the two ends of the second support rod 15 are respectively vertically connected to the two mother rods 11. Through the connecting action of the second support rod 15, the telescopic connector 1 forms a one-line structure, so that the length adjustment bracket is not easy to deform.

[0074] The second support rod 15 can be arranged at any position of the mother rod 11. In the present application, the second support rod 15 is preferably connected to an end of the mother rod 11 away from the first clamping member 2, so that when the length of the telescopic connecting member 1 is adjusted to the longest, the second support rod

[0075] 15 is located in the middle of the entire telescopic connector 1, thereby ensuring the stability of the length-adjustable bracket structure.

[0076] Another object of the present invention is to provide a movable study table, which includes the length adjustment bracket as described above, and a movable table top connected to the length adjustment bracket.

[0077] Specifically, the movable desktop is connected to the top of the length adjustment bracket, and the length adjustment bracket is clamped on the desktop of an ordinary desk; by clamping the length adjustment bracket on the desktop of an ordinary desk, the movable desktop of the movable study table is located on the ordinary desk, and the user can perform operations such as reading and writing on the movable desktop of the movable study table, thereby transforming the ordinary desk into a study table that is more ergonomic and human body mechanical, and without the need to purchase an additional smart study table, the user's comfort is improved and the user is helped to maintain a correct and comfortable reading and writing posture.

[0078] The movable table top connected to the length adjustment bracket in the present application can be any study table top that conforms to the characteristics of ergonomics and human body mechanics in the prior art, such as a study table top with an arm rest, a study table top with a touch sensing device to monitor and adjust the distance between the user's body and the edge of the table, and a study table top that corrects the sitting posture, etc. This article does not limit the specific structure and type of the movable study table.

[0079] The movable study table provided by the present invention connects the study table desktop that conforms to ergonomics and human body mechanics characteristics with an ordinary desk through a length adjustment bracket, and by relatively arranging the first clamping member 2 and the second clamping member 3 at both ends of the retractable connecting member 1 in the length adjustment bracket, the length adjustment bracket can be connected to ordinary desks of different sizes without damaging the desktop of the ordinary desk, thereby expanding the scope of use of the length adjustment bracket.

[0080] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A length adjustment bracket, characterized in that: It comprises a telescopic connecting member (1), and a first clamping member (2) and a second clamping member (3) respectively connected to two ends of the telescopic connecting member (1); The telescopic connecting member (1) comprises two parallel mother rods (11), two parallel child rods (12), and two adjustment locks (13) arranged in the mother rods (11); The first clamping member (2) is connected to the outer ends of the two mother rods (11), and the second clamping member (3) is connected to the outer ends of the two child rods (12); One end of the two sub-rods (12) is inserted into the two mother rods (11) respectively, the sub-rods (12) are slidably connected to the mother rods (11), and one end of the two sub-rods (12) inserted into the mother rods (11) is connected to the two adjustment locks (13) respectively, and the adjustment locks (13) are used to lock the mother rods (11) and the sub-rods (12); The adjustment switch of the adjustment lock (13) is integrated with the second clamping member (3); A plurality of positioning holes (111) are arranged at the upper end of the mother rod (11); the adjustment lock (13) comprises an adjustment structure and a positioning protrusion (132) arranged on the adjustment structure, the adjustment structure is connected to the adjustment switch, the positioning protrusion (132) is matched with the positioning hole (111), and the positioning protrusion (132) can be lifted and lowered under the drive of the adjustment structure; The regulating switch comprises an regulating slide rod (133) and a switch button (134); one end of the regulating slide rod (133) is connected to the regulating structure, and the other end is connected to the switch button (134); the regulating slide rod (133) is arranged in the sub-rod (12); The telescopic connecting member (1) also includes a first support rod (14), and the two sub-rods (12) are respectively vertically connected to the two ends of the first support rod (14), and the first support rod (14) is located at the outer end of the sub-rod (12); the adjusting slide rod (133) includes two parallel adjusting push rods (1331), and a linkage slide rod (1332) vertically connected to the two adjusting push rods (1331), and the linkage slide rod (1332) is arranged in the first support rod (14); the switch button (134) is arranged above the first support rod (14), and the switch button (134) is connected to the linkage slide rod (1332).

2. The length adjustment bracket according to claim 1, characterized in that: The first support rod (14) is provided with a first through hole (141), and a fastener passes through the first through hole (141) to connect the switch button (134) with the linkage slide rod (1332); the inner diameter of the first through hole (141) is larger than the outer diameter of the fastener, so that the switch button (134) can move in a horizontal direction.

3. The length adjustment bracket according to claim 2, characterized in that: The sub-rod (12) is provided with a second through hole (121) adapted to the linkage slide bar (1332), and the length of the second through hole (121) is greater than the thickness of the linkage slide bar (1332), so that the linkage slide bar (1332) can move horizontally in the second through hole (121).

4. The length adjustment bracket according to claim 1, characterized in that: Both ends of the second clamping member (3) are provided with connecting rods (31) adapted to the sub-rod (12), and the connecting rods (31) are suitable for being inserted into the sub-rod (12) so that the connecting rods (31) and the sub-rod (12) are slidably connected; the second clamping member (3) is also connected to the first support rod (14) via an adjusting bolt (4).

5. The length adjustment bracket according to claim 4, characterized in that: An adjusting cylinder (142) is arranged inside the first support rod (14), and an internal thread matched with the adjusting bolt (4) is arranged inside the adjusting cylinder (142); a third through hole (1333) suitable for the adjusting cylinder (142) to pass through is arranged on the linkage slide rod (1332), and the inner diameter of the third through hole (1333) is larger than the outer diameter of the adjusting cylinder (142); the adjusting bolt (4) passes through the adjusting cylinder (142) and is fixedly connected with the second clamping member (3).

6. The length-adjusting bracket according to any one of claims 1 to 5, characterized in that: The telescopic connecting member (1) further comprises a second supporting rod (15), and two ends of the second supporting rod (15) are respectively vertically connected to the two mother rods (11).

7. A movable study table, characterized in that: It comprises a length-adjusting bracket as claimed in any one of claims 1 to 6, and a movable desktop connected to the length-adjusting bracket.

Images