CN212698083U - Length adjustment support and activity study table - Google Patents

Abstract

The utility model provides a length adjusting bracket and a movable learning table, wherein the length adjusting bracket comprises a telescopic connecting piece, a first clamping piece and a second clamping piece; the telescopic connecting piece comprises two female rods arranged in parallel, two secondary rods arranged in parallel and two adjusting locks arranged in the female rods; one end of each of the two sub-rods is inserted into the two female rods respectively, the sub-rods are connected with the female rods in a sliding manner, one end of each of the two sub-rods inserted into the female rods is connected with the two adjusting locks respectively, and the adjusting locks are used for locking the female rods and the sub-rods; the adjusting switch of the adjusting lock and the second clamping piece are integrally designed. The utility model provides a length adjustment support under the condition that does not destroy ordinary desk's desktop, can link to each other with the ordinary desk of different size specifications to enlarge this length adjustment support's application range.

Description

Length adjustment support and activity study table

Technical Field

The utility model relates to a learning tools technical field particularly, relates to a length adjustment support and activity study table.

Background

The study table is a novel and scientific study auxiliary tool, and compared with the traditional desk, the desk top of the study table is more in accordance with the characteristics of human engineering and human mechanics, and is more beneficial to a user to keep a correct and comfortable reading and writing posture.

The desktop of the common desk is mostly a strip-shaped plate, and the desktop of the common desk does not have the characteristics that the desk conforms to human engineering and human mechanics, so that the desk is not beneficial to a user to keep correct and comfortable reading and writing postures.

For some families who purchase ordinary desks, study desks are purchased separately, on one hand, the indoor use area is further reduced when the study desks are placed separately, and on the other hand, the original desks are idle after the study desks are purchased, so that waste is caused; for this reason, movable learning tables adapted to be mounted on a general desk have appeared on the market, and such movable learning tables generally include a stand and a desk top connected to the stand, and the general desk is changed into a learning table adapted to be used by children by connecting the stand to the desk top of the general desk.

However, since the size of the common desk is various, in order to make the movable learning desk suitable for the common desks with various sizes, the support of the movable learning desk is usually connected with the desktop of the common desk through screws, so that the desktop of the common desk is damaged in the connection process.

SUMMERY OF THE UTILITY MODEL

The technical problem solved by the utility model is that the support of the current movable learning desk can damage the desktop of the common desk in the process of being connected with the common desk.

In order to solve the problems, the utility model provides a length adjusting bracket, which comprises a telescopic connecting piece, a first clamping piece and a second clamping piece, wherein the first clamping piece and the second clamping piece are respectively connected with two ends of the telescopic connecting piece;

the telescopic connecting piece comprises two female rods arranged in parallel, two secondary rods arranged in parallel and two adjusting locks arranged in the female rods;

the first clamping piece is connected to the outer ends of the two female rods, and the second clamping piece is connected to the outer ends of the two male rods;

one end of each of the two sub-rods is inserted into the two female rods respectively, the sub-rods are connected with the female rods in a sliding manner, one end of each of the two sub-rods inserted into the female rods is connected with the two adjusting locks respectively, and the adjusting locks are used for locking the female rods and the sub-rods;

the adjusting switch of the adjusting lock and the second clamping piece are integrally designed.

Optionally, the upper end of the female rod is provided with a plurality of positioning holes; the adjusting lock comprises an adjusting structure and a positioning bulge arranged on the adjusting structure, the adjusting structure is connected with the adjusting switch, the positioning bulge is matched with the positioning hole, and the positioning bulge can be driven by the adjusting structure to move up and down.

Optionally, the adjusting switch comprises an adjusting slide rod and a switch button, one end of the adjusting slide rod is connected with the adjusting structure, and the other end of the adjusting slide rod is connected with the switch button; the adjusting slide rod is arranged in the sub-rod.

Optionally, the telescopic connector further comprises a first support rod, the two sub-rods are respectively vertically connected to two ends of the first support rod, and the first support rod is located at the outer ends of the sub-rods; the adjusting slide rods comprise two adjusting push rods arranged in parallel and linkage slide rods vertically connected with the two adjusting push rods, and the linkage slide rods are arranged in the first supporting rods; the switch button is arranged above the first supporting rod and connected with the linkage sliding rod.

Optionally, a first through hole is formed in the first support rod, and a fastener penetrates 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 fastening member so that the switch button can move in the horizontal direction.

Optionally, a second through hole adapted to the linkage slide rod is formed in the sub-rod, and the length of the second through hole is greater than the thickness of the linkage slide rod, so that the linkage slide rod can move in the second through hole in the horizontal direction.

Optionally, both ends of the second clamping piece are provided with connecting rods matched with the sub-rods, and the connecting rods are suitable for being inserted into the sub-rods so that the connecting rods are connected with the sub-rods in a sliding manner; the second clamping piece is further connected with the first supporting rod through an adjusting bolt.

Optionally, an adjusting cylinder is arranged in the first support rod, and an internal thread matched with the adjusting bolt is arranged in the adjusting cylinder; a third through hole suitable for the adjusting cylinder to penetrate through is formed in the linkage sliding rod, and the inner diameter of the third through hole is larger than the outer diameter of the adjusting cylinder; the adjusting bolt penetrates through the adjusting cylinder and is fixedly connected with the second clamping piece.

Optionally, the telescopic connection piece further comprises a second support rod, and two ends of the second support rod are respectively and vertically connected with the two female rods.

Another object of the present invention is to provide a movable learning table, which comprises the length-adjustable support, and a movable table top connected to the length-adjustable support.

Compared with the prior art, the utility model provides a length adjustment support has following advantage:

the utility model provides a length adjustment support sets up first holder and second holder relatively through the both ends at telescopic connection spare for this length adjustment support can link to each other with the ordinary desk of different size specifications under the condition that does not destroy the desktop of ordinary desk, thereby enlarges the application range of this length adjustment support.

Drawings

Fig. 1 is a schematic structural diagram of a length-adjusting bracket according to the present invention;

fig. 2 is a cross-sectional view of the long team adjusting bracket according to the present invention;

fig. 3 is a schematic structural diagram of the adjusting lock of the present invention;

fig. 4 is an exploded view of the sub-rod, the adjustment switch and the second clamping member according to the present invention;

fig. 5 is an assembly view of the sub-rod, the adjusting switch and the second clamping member of the present invention.

Description of reference numerals:

1-a telescopic connection; 11-a female rod; 111-locating holes; 12-a sub-rod; 121-a second via; 13-adjusting the lock; 131-a lock case; 1311-a limiting hole; 1312-a lock housing; 1313-lower lock housing; 1314-front baffle; 1315-a tailgate; 1316-a first groove; 1317 — second groove; 1318-lock inner shell; 132-a positioning projection; 133-adjusting the slide bar; 1331-adjusting the push rod; 1332-linking the slide bars; 1333-a third via; 134-switch button; 135-up and down sliding pins; 1351-sliding hole; 1352-first ball bearing; 1353-second ball; 136-smooth pin; 137-flat sliding block; 138-a baffle; 139-a spring; 14-a first support bar; 141-a first via; 142-a conditioning cylinder; 15-a second support bar; 2-a first clamp; 3-a second clamp; 31-a first clamping layer; 32-a second clamping layer; 321-an abutting plate; 322-fourth via; 323-fifth via; 33-a third clamping layer; 34-inclined plane; 35-rivets; 36-a connecting rod; 4-adjusting the bolt.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention, and all other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for the purpose of simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first" and "second" are used merely to simplify the description and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present disclosure, unless otherwise expressly stated or limited, a first feature "on" or "under" a first feature may comprise the first feature and a second feature in direct contact, or may comprise the first feature and the second feature not in direct contact but in contact with each other through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In order to solve the problem that the support of the movable learning table used on the common desk at present can damage the desktop of the common desk in the process of connecting the movable learning table with the common desk, the utility model provides a length adjusting support, which is shown in figures 1 and 2 and comprises a telescopic connecting piece 1, a first clamping piece 2 and a second clamping piece 3 which are respectively connected with two ends of the telescopic connecting piece 1, wherein the desktop of the common desk is clamped from two opposite directions through the first clamping piece 2 and the second clamping piece 3 respectively so as to realize the connection with the common desk; because first holder 2 and second holder 3 are connected respectively in the both ends of telescopic connection spare 1, carry out concertina movement through telescopic connection spare 1, can adjust the distance between first holder 2 and the second holder 3 to make the length adjustment support that this application provided can link to each other with the ordinary desk that has different dimensions under the condition that does not destroy the desktop of ordinary desk.

The telescopic connecting piece 1 comprises two female rods 11 arranged in parallel, two sub rods 12 arranged in parallel and two adjusting locks 13 arranged in the female rods 11; the first clamping piece 2 is connected to the outer ends of the two female rods 11, and the second clamping piece 3 is connected to the outer ends of the two sub-rods 12; the outer end of the female rod 11 in the application specifically refers to one end of the female rod 11, which is far away from a clamped common desk top; similarly, the outer end of the sub-rod 12 specifically refers to the end of the sub-rod 12 away from the clamped desk top of a common desk.

One end of each of the two sub-rods 12 is inserted into the two female rods 11, namely, a sub-rod 12 is inserted into each of the female rods 11, the sub-rods 12 are slidably connected with the corresponding female rods 11, one end of each of the two sub-rods 12 inserted into the female rods 11 is connected with two adjusting locks 13, and the adjusting locks 13 are used for locking the female rods 11 and the sub-rods 12.

During use, the adjusting lock 13 is unlocked, so that the female rod 11 and the sub-rod 12 positioned in the female rod 11 are unlocked, the unlocked sub-rod 12 can slide in the female rod 11, the length of the sub-rod 12 inserted into the female rod 11 is adjusted while the sub-rod 12 slides, and then the length between the outer end of the female rod 11 and the outer end of the sub-rod 12 is adjusted, namely the distance between the first clamping piece 2 and the second clamping piece 3 is adjusted, and meanwhile, the sub-rod 12 drives the corresponding adjusting lock 13 to adjust the position; according to the size of the desktop of the clamped common desk, when the distance between the first clamping piece 2 and the second clamping piece 3 is adjusted to be matched with the size of the clamped desktop, the locking adjusting lock 13 locks the female rod 11 and the corresponding sub-rod 12, so that the length of the telescopic connecting piece 1 is kept unchanged, and the desktop of the common desk is clamped through the first clamping piece 2 and the second clamping piece 3.

Further, for reducing the volume of length adjustment support, be convenient for control this length adjustment support simultaneously, the regulating switch that this application is preferred to be adjusted the lock sets up in a certain outer end of telescopic connection spare 1, and this application is preferred to set up this regulating switch in the outer end of sub-pole 12, makes this regulating switch and the adjacent setting of second holder 3 to further make this regulating switch and the integrated design of second holder 3 of adjusting lock 13.

The utility model provides a length adjustment support sets up first holder 2 and second holder 3 relatively through the both ends at telescopic connection spare 1 for this length adjustment support can link to each other with the ordinary desk of different size specifications under the condition that does not destroy the desktop of ordinary desk, thereby enlarges the application range of this length adjustment support.

In order to lock the female rod 11 and the corresponding male rod 12 by adjusting the lock 13, the upper end of the female rod 11 is provided with a plurality of positioning holes 111; the adjusting lock 13 comprises an adjusting structure and a positioning protrusion 132 arranged on the adjusting structure, the adjusting structure is connected with the adjusting switch, the positioning protrusion 132 is matched with the positioning hole 111, and the positioning protrusion 132 can be driven by the adjusting structure to move up and down.

In the use, through operation adjustment switch, drive and adjust the structure action, when adjusting the structure and moving, drive and set up the location arch 132 that adjusts on the structure and carry out the elevating movement to realize the locking and the unblock operation of adjusting lock 13.

For the present application, since the positioning hole 111 is disposed at the upper end of the female rod 11, and the adjusting lock 13 is disposed in the female rod 11, when the adjusting structure drives the positioning protrusion 132 to perform the ascending motion, the positioning protrusion 132 is inserted into the corresponding positioning hole 111 on the female rod 11, so that the male rod 12 and the female rod 11 cannot slide relatively, thereby locking the female rod 11 and the male rod 12; on the contrary, when the adjusting structure drives the positioning protrusion 132 to perform descending movement, the positioning protrusion 132 is disengaged from the corresponding positioning hole 111, so that the sub-rod 12 and the main rod 11 can slide relatively, and the sub-rod 11 and the sub-rod 12 can be unlocked.

The specific structure of the adjusting structure in the present application depends on the type of the adjusting lock 13; the adjusting lock 13 in the present application may be any adjusting lock structure capable of locking and unlocking the female rod 11 and the male rod 12 in the prior art; in order to adjust the length of the telescopic connection member 1, referring to fig. 3, the adjusting lock 13 further includes a lock housing 131, wherein the adjusting structure is disposed in the lock housing 131, a position limiting hole 1311 adapted to the positioning protrusion 132 is disposed on the lock housing 131, and the positioning protrusion 132 can pass through the position limiting hole 1311 to perform a lifting motion.

Specifically, the adjusting structure in this application includes upper and lower sliding pins 135, a smooth pin 136 and a flat sliding block 137, the upper and lower sliding pins 135 are block-shaped structures, the positioning protrusion 132 is disposed on the upper and lower sliding pins 135, the upper and lower sliding pins 135 are disposed in the lock case 131, and a gap is disposed between the lower ends of the upper and lower sliding pins 135 and the lock case 131, wherein a strip-shaped sliding hole 1351 is disposed in the upper and lower sliding pins 135, the sliding hole 1351 is disposed in the upper and lower sliding pins 135 in an inclined manner, the flat sliding pin 136 is disposed in the sliding hole 1351, and both ends of the flat sliding pin 136 are connected to the flat sliding block 137, the flat sliding block 137 is used for driving the flat sliding pin 136 to move in the horizontal direction, and the flat sliding block 137 is connected to the adjusting switch, so that when the adjusting switch is operated, the flat sliding block 137 can be driven to move, and the flat sliding pin 136.

The sliding hole 1351 is obliquely arranged in the upper sliding pin 135 and the lower sliding pin 135 in the application, specifically, the sliding hole 1351 is obliquely arranged along the length direction thereof, so that when the adjusting lock 13 is horizontally arranged, the distances between the head end and the tail end of the sliding hole 1351 in the length direction and the lock shell 131 below the sliding hole are different, that is, the heights of the head end and the tail end of the sliding hole 1351 in the length direction are different; when the flat sliding block 137 drives the flat sliding pin 136 to move along the horizontal direction, if the flat sliding pin 136 moves from the lower end to the higher end of the sliding hole 1351, along with the movement of the flat sliding pin 136, the flat sliding pin 136 presses the bottom of the sliding hole 1351, so that the upper and lower sliding pins 135 move downward, and simultaneously, the positioning protrusion 132 is driven to move downward and be disengaged from the positioning hole 111, so that the sub-rod 12 is disengaged from the main rod 11, and unlocking is achieved; the sub-rod 12 can slide in the main rod 11 at the moment, and the length of the telescopic connecting piece 1 is adjusted; after the adjustment is completed, the flat sliding block 137 drives the flat sliding pin 136 to move horizontally from the high end to the low end of the sliding hole 1351, the flat sliding pin 136 no longer generates pressure on the bottom of the sliding hole 1351, the positions of the upper and lower sliding pins 135 move upwards, and simultaneously the positioning protrusion 132 is driven to rise, so that the positioning protrusion 132 is inserted into the corresponding positioning hole 111, and the sub-rod 12 and the main rod 11 are locked.

The lock case 131 comprises a lock case 1312 and a lower lock case 1313, the lock case 1312 is connected with the lower lock case 1313, a space for accommodating an adjusting structure is formed inside the lock case 1312, and a limiting hole 1311 is formed in the upper lock case 1312; the upper and lower sliding pins 135 can be abutted by the lock case 131, so that a gap is formed between the lower end of the upper and lower sliding pins 135 and the lower outer lock case 1313 positioned below; in the application, a front baffle 1314 and a rear baffle 1315 are arranged on the lower lock shell 1313, the upper and lower sliding pins 135 are arranged between the front baffle 1314 and the rear baffle 1315, and a gap is formed between the lower part of the upper and lower sliding pins 135 and the lower lock shell 1313 through the abutting action between the front baffle 1314 and the rear baffle 1315; further, a first ball 1352 is arranged at the front end of the up-down sliding pin 135, i.e., the end adjacent to the front baffle 1314, a first groove 1316 matched with the first ball 1352 is arranged on the front baffle 1314, and the friction force between the up-down sliding pin 135 and the front baffle 1314 during the up-down movement of the up-down sliding pin 135 is reduced by the first ball 1352 rolling in the first groove 1316; similarly, a second ball 1353 is disposed at the rear end of the up-down sliding pin 135, i.e., the end adjacent to the rear baffle 1315, and a second groove 1317 is disposed on the rear baffle 1315, so that the second ball 1353 rolls in the second groove 1317 to reduce the friction between the up-down sliding pin 135 and the rear baffle 1315 during the up-down movement, thereby reducing the difficulty of adjustment and reducing the wear during the adjustment.

In order to enable the adjusting lock 13 to realize automatic locking, the adjusting lock 13 further comprises a baffle plate 138 and a spring 139, the baffle plate 138 is connected with the second ball 1353, one end of the spring 139 is connected with the baffle plate 138, and the other end is connected with the flat sliding block 137; during the process of unlocking the adjusting lock 13, the flat sliding block 137 drives the flat sliding pin 136 to move from the lower end to the upper end of the sliding hole 1351 along the horizontal direction, and in the process, the spring 139 generates extrusion deformation or stretching deformation; after the length of the telescopic connecting piece 1 is adjusted, the adjusting switch is loosened, the flat sliding block 137 is not subjected to external force applied by the adjusting switch any more, the spring 139 restores the original shape, in the restoring process, the spring 139 pushes or pulls the flat sliding block 137 to move in the direction opposite to the moving direction in the unlocking process, meanwhile, the flat sliding pin 136 is driven to move from the high end to the low end of the sliding hole 1351 along the horizontal direction, the upper sliding pin 135 and the lower sliding pin 135 move upwards, meanwhile, the position of the positioning protrusion 132 is driven to move upwards, so that the positioning protrusion 132 is inserted into the corresponding positioning hole 111, and automatic locking is realized.

Further, the lock case 131 further includes a lock inner casing 1318 having a frame-like structure, the lock inner casing 1318 is disposed above the lower lock outer casing 1313, and the front baffle 1314, the rear baffle 1315 and the adjusting structure are disposed in the lock inner casing 1318, so that the stability of the adjusting lock 13 structure is further improved by disposing the lock inner casing 1318.

Referring to fig. 4 and 5, the adjusting switch in the present application includes an adjusting slide bar 133 and a switch button 134, wherein one end of the adjusting slide bar 133 is connected to the adjusting structure, and specifically, one end of the adjusting slide bar 133 in the present application is connected to a flat slide block 137; the other end of the adjusting slide bar 133 is connected with a switch button 134; the adjusting slide 133 is disposed within the sub-rod 12.

In the adjusting process, by pressing the switch button 134, a pushing force can be generated on the adjusting slide rod 133, and then the adjusting slide rod 133 can adjust the adjusting structure connected with the adjusting slide rod 133, for the purposes of the present application, that is, the pushing force is generated on the flat slide block 137, and under the action of the pushing force, the adjusting structure drives the positioning protrusion 132 to move downwards and be separated from the positioning hole 111, so that unlocking is realized; after the switch button 134 is released, the adjusting structure is no longer pushed by the adjusting slide rod 133, and the adjusting structure drives the positioning protrusions 132 to move upward and insert into the corresponding positioning holes 111, so as to achieve locking.

Wherein the switch button 134 can be disposed at any convenient position, in order to realize the integrated design of the adjusting switch and the second clamping member 3, the present application preferably arranges the switch button 134 on the sub-rod 12 near the second clamping member 3.

In order to facilitate the design of integrating the adjustment switch with the second clamping member 3, the telescopic connecting member 1 further includes a first supporting rod 14, two sub-rods 12 are respectively and vertically connected to two ends of the first supporting rod 14, the first supporting rod 14 is located at the outer end of the sub-rod 12, i.e. at the end of the sub-rod 12 away from the clamped common desk top, and is adjacent to the second clamping member 3; the adjusting slide bar 133 comprises two adjusting push rods 1331 arranged in parallel and a linkage slide bar 1332 vertically connected with the two adjusting push rods 1331, the two adjusting push rods 1331 are respectively located at two ends of the linkage slide bar 1332, the two adjusting push rods 1331 are respectively arranged in the two sub-bars 12, the two adjusting push rods 1331 are respectively connected with adjusting structures of the two adjusting locks 13, and for the purpose of the present application, the two adjusting push rods 1331 are respectively connected with the two flat sliders 137; a linkage slide 1332 is disposed within the first support bar 14; the switch button 134 is disposed above the first support bar 14, and the switch button 134 is connected to the linkage slide bar 1332.

By pressing the switch button 134, a pushing force in a direction from the second clamping piece 3 to the clamped object or a pulling force in a direction from the clamped object to the second clamping piece 3 is applied to the linkage slide bar 1332, the linkage slide bar 1332 simultaneously generates a pushing force or a pulling force on the two adjusting push rods 1331 connected with the linkage slide bar 1332, and the two adjusting push rods 1331 simultaneously push the two adjusting structures to perform the pushing force or the pulling force, so that unlocking is realized.

For the adjusting lock 13 provided by the present application, when the end of the sliding hole 1351 close to the second clamping member 3 is a low end, the adjusting push rod 1331 is adjusted to unlock the adjusting structure while pushing; conversely, when the end of the slide hole 1351 away from the second clamping member 3 is a lower end, the adjusting push rod 1331 is unlocked when pulling force is applied to the adjusting structure.

Through setting up first bracing piece 14, help improving the stability of telescopic connector 1 structure on the one hand, on the other hand still makes to control two regulation locks 13 simultaneously through a shift knob 134 to guarantee that the both sides of telescopic connector 1 are adjusted in step in the accommodation process, avoid appearing the condition of telescopic connector 1 both sides slope after adjusting.

In order to connect the switch button 134 to the linkage slide bar 1332, the first support rod 14 is provided with a first through hole 141, a fastener passes through the first through hole 141 to connect the switch button 134 to the linkage slide bar 1332, and the first through hole 141 has an inner diameter greater than an outer diameter of the fastener to enable the switch button 134 to move in a horizontal direction.

That is, the upper end of the fastener is fixedly connected to the switch button 134, and the lower end of the fastener is fixedly connected to the linkage slide bar 1332, so that when the switch button 134 is pressed in the horizontal direction, the switch button 134 applies a corresponding pushing force or pulling force to the linkage slide bar 1332 through the fastener, thereby unlocking the lock.

Similarly, the sub-rod 12 is provided with a second through hole 121 adapted to the linkage slide rod 1332, and the length of the second through hole 121 is greater than the thickness of the linkage slide rod 1332, so that the linkage slide rod 1332 can move in the second through hole 121 in the horizontal direction.

In order to connect the second clamping member 3 with the sub-rod 12 conveniently, both ends of the second clamping member 3 are provided with connecting rods 31 matched with the sub-rod 12, and the connecting rods 31 are suitable for being inserted into the sub-rod 12 so as to enable the connecting rods 31 to be connected with the sub-rod 12 in a sliding mode; in order 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 by the adjusting bolt 4.

Through setting up first bracing piece 14, set up the linkage slide bar 1332 who adjusts lock 13 in first bracing piece 14, set up shift knob 134 in the top of first bracing piece 14, and further realize being connected between telescopic connection spare 1 and the second holder 3 through this first bracing piece 14, thereby realize adjusting the integrated design of the regulating switch of lock 13 and second holder 3, improve the compactness of length adjustment supporting structure, reduce the volume, the operation of being convenient for simultaneously.

Specifically, an adjusting cylinder 142 is arranged in the first support rod 14, and the adjusting cylinder 142 is fixedly connected with the first support rod 14; an internal thread matched with the adjusting bolt 4 is arranged in the adjusting cylinder 142; the linkage sliding rod 1332 is provided with a third through hole 1333 which is suitable for the adjustment cylinder 142 to pass through, and the inner diameter of the third through hole 1333 is larger than the outer diameter of the adjustment cylinder 142, so that the operation of the adjustment lock 13 and the operation of the second clamping piece 3 do not interfere with each other; adjusting bolt 4 passes through adjusting a section of thick bamboo 142 and second holder 3 fixed connection, and adjusting bolt 4 is the one end adjacent with second holder 3 promptly, with this second holder 3 fixed connection, this fixed connection mode can be welding etc..

Through setting up adjusting bolt 4 and adjusting a section of thick bamboo 142, can also finely tune the distance between first holder 2 and the second holder 3 for the distance between first holder 2 and the second holder 3 and the size adaptation of ordinary desk desktop are more, thereby further improve the stability of being connected between this length adjustment support and the ordinary desk desktop.

The specific fine adjustment process comprises the steps of firstly primarily adjusting the distance between the first clamping piece 2 and the second clamping piece 3 through the adjusting lock 13 according to the size of the clamped common desk top, then driving the second clamping piece 3 to move in the direction away from the sub-rod 12 or close to the sub-rod 12 through rotating the adjusting bolt 4, further increasing or reducing the distance between the first clamping piece 2 and the second clamping piece 3, and finishing fine adjustment.

The first clamping piece 2 and the second clamping piece 3 in the application can be clamping structures in any form in the prior art; the second clamping member 3 preferably comprises a first clamping layer 31, a second clamping layer 32 and a third clamping layer 33 which are arranged from outside to inside in sequence; the outer to inner in the application specifically means from the side far away from the sub-rod 12 to the side near the sub-rod 12; the third clamping layer 33 is embedded on the second clamping layer 32, and the third clamping layer 33 is abutted with the tabletop of the clamped common desk; the first clamping layer 31 is connected with the second clamping layer 32 in a sliding mode; 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 tabletop of the clamped common desk; the lower end of the first clamping layer 31 is contacted with the lower end of the second clamping layer 32 through an inclined surface 34; the inclined surface 34 gradually approaches the tabletop of the clamped ordinary desk from top to bottom.

Wherein the angle between the inclined surface 34 and the vertical surface is between 10 ° and 20 °, preferably the angle is 15 °.

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

Further, the second clamping layer 32 is provided with an abutting plate 321 which is parallel to the upper surface of the clamped desk top of the ordinary desk, and the abutting plate 321 abuts against the upper surface of the clamped desk top of the ordinary desk.

First centre gripping layer 31 and second centre gripping layer 32 carry out loose fit through rivet 35, and loose fit in this application specifically means, links to each other first centre gripping layer 31 and second centre gripping layer 32 through rivet 35, can produce relative slip between first centre gripping layer 31 and the second centre gripping layer 32 simultaneously.

Specifically, a fourth through hole 322 is formed in the second clamping layer 32, and the rivet 35 penetrates through the fourth through hole 322 to be connected with 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 of the rivet 35, so that the first clamping layer 31 and the second clamping layer 32 can only slide relatively in the vertical plane, but can not be separated in other directions, such as the horizontal direction.

In order to ensure that the first clamping layer 31 and the second clamping layer 32 can slide, in this application, the second clamping layer 32 is further provided with a fifth through hole 323, and the inner diameter of the fifth through hole 323 is greater than the outer diameter of the adjusting cylinder 142, so that after the adjusting cylinder 142 passes through the fifth through hole 323, the adjusting bolt 4 is connected with the first clamping layer 31, and the first clamping layer 31 and the second clamping layer 32 can slide within a certain range.

When the second clamping member 3 provided by the present application applies an upward pulling force to the length adjustment bracket having the second clamping member 3, since the first clamping layer 31 and the second clamping layer 32 are slidably connected by 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 desk top, at this time, the relative position between the third clamping layer 33 and the clamped desk top remains unchanged, a sliding tendency that the first clamping layer 31 and the second clamping layer 32 at the inclined surface 34 are distributed along the inclined surface 34 and point upward from below is generated, that is, a sliding tendency that the first clamping layer 31 and the second clamping layer 32 at the inclined surface 34 are distributed along the inclined surface 34 and point upward from below is generated; since the inclined surface 34 gradually approaches to the clamped common desk top from top to bottom, the force generated at the inclined surface 34 generates a component force pointing to the direction of the clamped common desk top, so that the force applied by the second clamping member 3 to the clamped common desk top is the sum of the pretightening force generated by the third clamping layer 33 to the clamped common desk top and the component force generated at the inclined surface 34, thereby increasing the connection strength between the second clamping member 3 and the clamped common desk top.

Further, for the structural stability who improves the length adjustment support, telescopic connector 1 still includes second bracing piece 15 in this application, and the both ends of second bracing piece 15 are connected with two female poles 11 are perpendicular respectively, through the joint action of second bracing piece 15 for telescopic connector 1 constitutes a style of calligraphy of one's day structure, makes length adjustment support non-deformable.

This second bracing piece 15 can set up in female pole 11 optional position department, and this second bracing piece 15 is preferred to be connected in the one end of keeping away from first holder 2 on female pole 11 in this application to make with the length adjustment of telescopic connection spare 1 to the longest, second bracing piece 15 is located the intermediate position of whole telescopic connection spare 1, thereby guarantees length adjustment supporting structure's stability.

Another object of the present invention is to provide a movable learning table, which comprises the length-adjustable support and a movable table top connected to the length-adjustable support.

Specifically, the movable desk top is connected above a length adjusting bracket, and the length adjusting bracket is clamped on the desk top of a common desk; through with length adjustment support centre gripping on the desktop of ordinary desk for the activity desktop of activity study table is located ordinary desk, and the user can read and write etc. operation on the activity desktop of this activity study table, thereby reforms transform ordinary desk into the study table that accords with human engineering and human mechanics more, need not additionally to purchase the basis of intelligent study table, improves user's comfort level, helps the user to keep correct, comfortable reading and writing posture.

Connect the activity desktop on the length adjustment support in this application can be for the study desk desktop that accords with human engineering and human mechanics characteristics wantonly among the prior art, if be provided with the study desk desktop that the arm held in the palm, be provided with touching induction system to monitor and adjust user's health and table edge distance, correct the study desk desktop of position of sitting etc. this paper does not do the injecture to the concrete structure and the type of activity study desk.

The utility model provides an activity study table will accord with the study table desktop of human engineering and human mechanics characteristics through the length adjustment support and link to each other with ordinary desk, sets up first holder 2 and second holder 3 relatively through the both ends of telescopic connection spare 1 in the length adjustment support for this length adjustment support can link to each other with the ordinary desk of different size specifications under the condition that does not destroy the desktop of ordinary desk, thereby enlarges the application range of this length adjustment support.

Although the present disclosure has been described above, the scope of the present 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 present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims (10)

1. A length adjusting bracket is characterized by comprising a telescopic connecting piece (1), a first clamping piece (2) and a second clamping piece (3) which are respectively connected to two ends of the telescopic connecting piece (1);

the telescopic connecting piece (1) comprises two female rods (11) arranged in parallel, two sub rods (12) arranged in parallel and two adjusting locks (13) arranged in the female rods (11);

the first clamping piece (2) is connected to the outer ends of the two female rods (11), and the second clamping piece (3) is connected to the outer ends of the two sub rods (12);

one end of each of the two sub-rods (12) is inserted into each of the two main rods (11), the sub-rods (12) are slidably connected with the main rods (11), one end of each of the two sub-rods (12) inserted into the main rods (11) is connected with each of the two adjusting locks (13), and each of the adjusting locks (13) is used for locking the main rods (11) and the sub-rods (12);

the adjusting switch of the adjusting lock (13) and the second clamping piece (3) are integrally designed.

2. A length adjustment bracket according to claim 1, characterized in that the upper end of the female rod (11) is provided with a plurality of positioning holes (111); adjust lock (13) including adjust the structure, set up in adjust the protruding (132) of location on the structure, adjust the structure with regulating switch links to each other, protruding (132) of location with locating hole (111) looks adaptation, protruding (132) of location can adjust structure drives down and carry out elevating movement.

3. A length adjustment bracket according to claim 2, wherein the adjustment switch comprises an adjustment slide (133) and a switch button (134), one end of the adjustment slide (133) being connected to the adjustment structure and the other end being connected to the switch button (134); the adjusting slide rod (133) is arranged in the sub-rod (12).

4. A length adjustment bracket according to claim 3, characterized in that said telescopic connector (1) further comprises a first support rod (14), two of said sub-rods (12) being connected perpendicularly to both ends of said first support rod (14), respectively, said first support rod (14) being located at the outer ends of said sub-rods (12); the adjusting slide rod (133) comprises two adjusting push rods (1331) which are arranged in parallel and a linkage slide rod (1332) which is vertically connected with the two adjusting push rods (1331), and the linkage slide rod (1332) is arranged in the first supporting rod (14); the switch button (134) is arranged above the first supporting rod (14), and the switch button (134) is connected with the linkage sliding rod (1332).

5. The length adjustment bracket according to claim 4, wherein 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 first through hole (141) has an inner diameter larger than an outer diameter of the fastener to enable the switch button (134) to move in a horizontal direction.

6. The length-adjusting bracket according to claim 5, characterized in that the sub-rod (12) is provided with a second through hole (121) adapted to the linkage sliding rod (1332), and the length of the second through hole (121) is greater than the thickness of the linkage sliding rod (1332), so that the linkage sliding rod (1332) can move horizontally in the second through hole (121).

7. A length adjustment bracket according to claim 4, characterized in that the second clamping member (3) is provided at both ends with a connecting rod (31) adapted to the sub-rod (12), the connecting rod (31) being adapted to be inserted into the sub-rod (12) to slidably connect the connecting rod (31) with the sub-rod (12); the second clamping piece (3) is further connected with the first supporting rod (14) through an adjusting bolt (4).

8. The length adjustment bracket according to claim 7, characterized in that an adjustment cylinder (142) is arranged in the first support rod (14), and an internal thread adapted to the adjustment bolt (4) is arranged in the adjustment cylinder (142); a third through hole (1333) which is suitable for the adjusting cylinder (142) to pass through is formed in the linkage sliding 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) penetrates through the adjusting cylinder (142) and is fixedly connected with the second clamping piece (3).

9. A length adjustment bracket according to any one of claims 1 to 8, characterized in that the telescopic connection member (1) further comprises a second support bar (15), and both ends of the second support bar (15) are respectively vertically connected with the two female bars (11).

10. A movable learning table, comprising a length-adjustable support as claimed in any one of claims 1 to 9, and a movable table top attached to the length-adjustable support.

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