Reading desk with easy adjustment of tabletop angle

Abstract

The present invention discloses a reading desk that is convenient for adjusting the angle of the desktop, and specifically relates to the technical field of office and study supplies, including a fixed desktop, an adjustable desktop is arranged on the upper part of the fixed desktop, a book stop is arranged on the lower part of the adjustable desktop, and both sides of the inner cavity of the storage box are provided with limiting devices, and the two limiting devices are provided with lifting devices on the side close to the book stop. The reading desk that is convenient for adjusting the angle of the desktop described in the present invention is provided with a lifting device, and while the transmission device pushes the adjustable desktop to move upward, the arc-shaped tooth surface 2 drives the lifting device to move, so that the first connecting rod is driven by the transmission disc and the slide rod to push the book stop to move upward relative to the adjustable desktop, and under the push of the slide rod, the book stop is pushed upward to block the objects placed on the adjustable desktop, so as to prevent the objects placed on the adjustable desktop from sliding off and causing unnecessary losses, thereby improving the reliability of the device.

Description

Technical Field

[0001] The invention relates to the technical field of office and study supplies, and in particular to a reading desk which is convenient for adjusting the angle of the desktop. Background Art

[0002] Desks are a widely used office and study supplies. Currently, most of the desks on the market have horizontally fixed desktops. During study and work, users tend to lean over the desktop when reading or writing, causing excessive bowing of the head. Long-term use can cause damage to the cervical spine and back, endangering the user's health.

[0003] Chinese patent document CN107224107A discloses a desk with adjustable desktop angle, including a desktop panel and a support column, the desktop panel is supported on the support column, the desktop panel includes a first desktop panel and a second desktop panel, the first desktop panel is hingedly connected to the second desktop panel, and the first desktop panel is arranged on the upper side of the second desktop panel; the second desktop panel is provided with a receiving groove on a side facing the first desktop panel, and the side facing away from the first desktop panel is supported on the support column; a plurality of rows of limiting grooves are provided in the receiving groove, and a side of the first desktop panel facing the second desktop panel is hingedly connected to a support rod, the support rod can be supported on the limiting groove in the receiving groove, and the support rod is supported in different limiting grooves to achieve adjustment of the angle of the first desktop panel; when the support rod fits the first desktop panel, the support rod can be placed in the receiving groove on the second desktop panel, and the desktop angle of the desk of this scheme can be adjusted as needed, but in actual use, the book stop board cannot be retracted when the desk is not in a tilted state, resulting in the user being unable to place his arm on the edge of the table when using the desk, which is not conducive to the user's use of the desk. Summary of the invention

[0004] The main purpose of the present invention is to provide a reading desk with an easy-to-adjust tabletop angle, which can effectively solve the problem that the tabletop of the reading desk cannot be adjusted.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A reading desk that is convenient for adjusting the tabletop angle comprises a fixed tabletop, an adjustable tabletop is arranged on the upper part of the fixed tabletop, a book stopper is arranged on the lower part of the adjustable tabletop, a storage box is arranged on the lower part of the fixed tabletop, a transmission device is arranged in the middle of the inner cavity of the storage box, limiting devices are arranged on both sides of the inner cavity of the storage box, and lifting devices are arranged on the side of the two limiting devices close to the book stopper;

[0007] The inner wall of the fixed table top close to the limiting device is slidably connected to the limiting plate, and limiting grooves 1 are provided on both sides of the upper end of the fixed table top, and fixed grooves 2 are provided on the sides where the two limiting grooves 1 are close to each other, a sliding groove 1 is provided on the inner cavity surface of the fixed table top close to the book stop board, and an arc surface 4 is provided on the upper part of the inner cavity surface of the fixed table top close to the rotating shaft.

[0008] Preferably, the transmission device includes a transmission roller 1 rotatably connected to the inner wall of the storage box, and the end of the transmission roller 1 close to the book stop board extends to the outside of the storage box, the end of the transmission roller 1 extending to the outside of the storage box is provided with a transmission wheel, the other end of the transmission roller 1 is provided with a bevel gear 1, the side of the bevel gear 1 away from the book stop board is meshed with a bevel gear 2, the inner wall of the bevel gear 2 is provided with a transmission roller 2 rotatably connected to the inner wall of the storage box, spur gears 1 are provided on both sides of the outer surface of the transmission roller 2, and arc-shaped lifting rods are provided on the side of the two spur gears 1 close to the book stop board, and the upper ends of the two arc-shaped lifting rods are slidably connected to the lower end of the adjustment table top.

[0009] Preferably, the arc-shaped lifting rod comprises an arc rod, an arc-shaped tooth surface 1 is provided on one side of the outer surface of the arc rod, the arc-shaped tooth surface 1 is meshedly connected with a spur gear 1, and an arc-shaped tooth surface 2 is provided on the other side of the outer surface of the arc rod.

[0010] Preferably, the two limit devices include a limit gear fixedly connected to the outer surface of the second transmission roller, and the two limit gears are arranged on the side where the two limit gears are close to each other, and the side of the two limit gears away from the book stop plate is provided with an L-shaped limit rod rotatably connected to the inner wall of the storage box, and the upper part of the outer surface of the two L-shaped limit rods close to the limit gear is provided with an inclined surface 1, and the lower part of the two L-shaped limit rods is provided with a limit frame, and the side of the two limit frames away from each other is provided with an L-shaped transmission rod slidably connected to the inner wall of the storage box, and the upper ends of the two L-shaped transmission rods are slidably connected to the limit block, and the size and shape of the limit block match the second fixing groove.

[0011] Preferably, the two lifting devices include a spur gear three rotatably connected to the inner wall of the storage box, the spur gear three is meshingly connected to the arc-shaped tooth surface two, a transmission plate is provided on the side where the two spur gears three are close to each other, a sliding rod is provided on the upper part of the two transmission plates, and a connecting rod one rotatably connected to the lower end of the book stop plate is provided on the side where the outer surfaces of the two sliding rods are close to each other.

[0012] Preferably, the two transmission plates include an arc plate fixedly connected to the outer surface of the spur gear three, a transmission rod one is arranged on the upper part of the arc plate, and a sliding groove two slidingly connected to the outer surface of the sliding rod is provided on the side where the outer surfaces of the two transmission rods one are close to each other.

[0013] Preferably, a rotating shaft slidably connected to an inner cavity surface of a slide groove is provided at the lower end of the adjusting table top, a positioning hole slidably connected to an outer surface of a book stop is provided at the lower portion of the outer surface of the adjusting table top, a fixing groove 1 is provided on both sides of the inner cavity surface of the positioning hole, an arc surface 2 is provided at the upper portion of the side where the two fixing grooves 1 are close to each other, and an arc surface 1 is provided at the upper end of the adjusting table top close to the side of the slide rod.

[0014] Preferably, the book baffle includes a baffle plate, and limiting grooves 2 are provided on both sides of the outer surface of the baffle plate, and the inner cavities of the two limiting grooves 2 are each provided with a fixing rod 1, and the upper parts of the ends of the two fixing rods 1 that are away from each other are each provided with an arc surface 3, and the ends of the two fixing rods 1 that are close to each other are each provided with multiple springs.

[0015] Preferably, a support plate is provided on one side of the inner cavity surface of the storage box close to the limiting device, and limiting holes are provided on both sides of the lower end of the inner cavity of the storage box, and the limiting holes match the size of the arc-shaped lifting rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, a limiting device is provided. After the user lifts the adjusting table top to a corresponding height by rotating the transmission device, the limiting gear is limited by the L-shaped limiting rod, so that the transmission roller 2 fixedly connected to the limiting gear cannot rotate, and then the transmission device cannot move, thereby fixing the adjusting table top. When the user needs to lower the adjusting table top, the limiting block is moved into the fixing groove 2 close to the side of the arc-shaped lifting rod by adjusting the limiting block, so that the limiting block drives the limiting frame to move in the direction close to the side of the arc-shaped lifting rod through the L-shaped transmission rod. When the limiting frame contacts the lower part of the L-shaped limiting rod, the L-shaped limiting rod is rotated around the connecting shaft between the L-shaped limiting rod and the fixed table top, so that the upper part of the L-shaped limiting rod is out of contact with the limiting gear. At this time, the adjusting table top can be lowered, thereby improving the stability of the device.

[0018] 2. In the present invention, a lifting device is provided. When the transmission device pushes the adjusting table plate to move upward, the arc tooth surface 2 drives the spur gear 3 to rotate, so that the transmission plate drives the slide rod to rotate, and then the connecting rod 1 is driven by the transmission plate and the slide rod to push the book stop plate to move upward relative to the adjusting table plate. Under the push of the slide rod, the arc surface 2 and the arc surface 3 cooperate to overcome the thrust of the spring, and the fixed rod 1 is contracted into the inner cavity of the limiting groove 2, so that the slide rod can push the book stop plate to move upward, block the objects placed on the adjusting table plate, avoid the objects placed on the adjusting table plate from sliding off, and cause unnecessary losses, thereby improving the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the transmission structure of the present invention;

[0021] Figure 3 For the present invention Figure 2 A partial enlarged view of the middle part;

[0022] Figure 4 It is a schematic diagram of the structure of the arc-shaped lifting rod of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the lifting device of the present invention;

[0024] Figure 6 For the present invention Figure 5 A partial enlarged view of point B in the middle;

[0025] Figure 7 It is a schematic diagram of the book stop board structure of the present invention;

[0026] Figure 8 For the present invention Figure 7 A partial enlarged view of point C in the middle;

[0027] Fig. 9 It is a schematic diagram of the support plate assembly of the present invention;

[0028] Fig.10 This is a schematic diagram of the state when the adjustable table top of the present invention is not lifted.

[0029] In the figure: 1, fixed table top; 11, limit plate; 12, limit slot 1; 121, fixed slot 2; 13, slide slot 1; 14, arc surface 4; 2, adjustable table top; 21, rotating shaft; 22, positioning hole; 23, arc surface 1; 24, fixed slot 1; 241, arc surface 2; 3, book stopper; 31, stopper; 32, limit slot 2; 33, fixed rod 1; 331, arc surface 3; 34, spring; 4, transmission device; 41, transmission roller 1; 42, bevel gear 1; 43, transmission wheel; 44, bevel gear 2; 45, transmission roller 2; 46. Spur gear one; 47. Arc lifting rod; 471. Circular arc rod; 472. Arc tooth surface one; 473. Arc tooth surface two; 5. Limit device; 51. Limit gear; 52. L-type limit rod; 521. Inclined surface one; 53. Limit frame; 54. L-type transmission rod; 55. Limit block; 6. Lifting device; 61. Spur gear three; 62. Transmission disk; 621. Circular arc disk; 622. Transmission rod one; 623. Slide groove two; 63. Connecting rod one; 64. Slide rod; 7. Storage box; 71. Support plate; 72. Limit hole. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] Embodiment 1

[0032] like Figure 1-5 As shown in Figures 9, this embodiment discloses a reading desk which is convenient for adjusting the angle of the desktop, including a fixed table top 1, an adjustable table top 2 is arranged on the upper part of the fixed table top 1, and a storage box 7 is arranged on the lower part of the fixed table top 1. The storage box 7 is used to place a transmission device 4 and a limit device 5 to prevent users from touching the corresponding devices and affecting the operation of the reading desk. A transmission device 4 is arranged in the middle of the inner cavity of the storage box 7. The transmission device 4 is used to transfer kinetic energy. The user drives the limit device 5 to operate by rotating the transmission device 4, and then the limit device 5 drives the adjustable table top 2 to lift up. The limit devices 5 are arranged on both sides of the inner cavity of the storage box 7. The limit devices 5 are used to limit the transmission device 4 through the limit devices 5 after the user lifts the adjustable table top 2 to a certain angle, so as to fix the adjustable table top 2.

[0033] Furthermore, the inner wall of the fixed table top 1 on one side close to the limit device 5 is slidably connected to the limit plate 11. The limit plate 11 is used to cooperate with the rotation of the adjustable table top 2. Before the adjustable table top 2 is lifted, it needs to move a distance in the direction close to the limit plate 11, so that a certain space is created between the adjustable table top 2 and the surface of the inner cavity of the fixed table top 1 away from the side of the limit plate 11, so that the adjustable table top 2 can be transmitted. Limiting grooves 12 are provided on both sides of the upper end of the fixed table top 1, and fixed grooves 121 are provided on the side close to each other of the two limiting grooves 12. The limiting grooves 12 are used to cooperate with the limit device The transmission device 4 is limited by the setting 5, and then the adjustable table top 2 is fixed by the transmission device 4. A slide groove 13 is provided on the side of the inner cavity surface of the fixed table top 1 close to the book stop board 3. The slide groove 13 is used to cooperate with the movement of the adjustable table top 2 toward the side close to the limit plate 11. An arc surface 4 14 is provided on the upper part of the inner cavity surface of the fixed table top 1 close to the rotating shaft 21. The arc surface 4 14 is used to ensure that the end face of the adjustable table top 2 will contact the inner cavity surface of the fixed table top 1 when the adjustable table top 2 is lifted upward. The arc surface 4 14 can avoid limiting the lifting of the adjustable table top 2.

[0034] When the user needs to lift the adjustable table top 2, the adjustable table top 2 can be lifted by adjusting the transmission device 4. Figure 2As shown, the transmission device 4 includes a transmission roller 41 rotatably connected to the inner wall of the storage box 7, and the end of the transmission roller 41 close to the book stop board 3 extends to the outside of the storage box 7, and the end of the transmission roller 41 extending to the outside of the storage box 7 is provided with a transmission wheel 43, and the other end of the transmission roller 41 is provided with a bevel gear 42, and the side of the bevel gear 42 away from the book stop board 3 is meshed with a bevel gear 2 44, and the inner wall of the bevel gear 2 44 is provided with a transmission roller 2 45 rotatably connected to the inner wall of the storage box 7, and spur gears 46 are provided on both sides of the outer surface of the transmission roller 2 45, and arc-shaped lifting rods 47 are provided on the side of the two spur gears 46 close to the book stop board 3, and the upper ends of the two arc-shaped lifting rods 47 are slidably connected to the lower end of the adjustment table board 2.

[0035] In order to make the arc-shaped lifting rod 47 lift the adjustable table 2 under the drive of the spur gear 1 46, as shown in FIG. Figure 4 As shown, the arc-shaped lifting rod 47 includes an arc rod 471 , and an arc tooth surface 1 472 is provided on one side of the outer surface of the arc rod 471 , and the arc tooth surface 1 472 is meshedly connected with the spur gear 1 46 .

[0036] Specifically, when the user needs to lift the adjustment table top 2, the transmission wheel 43 can be rotated to drive the transmission roller 1 41 to rotate, so that the transmission roller 1 41 drives the bevel gear 1 42 and the bevel gear 2 44 meshing with the bevel gear 1 42 to rotate, and then the bevel gear 2 44 drives the transmission roller 2 45 to rotate, and the transmission roller 2 45 drives the spur gear 1 46 to rotate, thereby driving the arc-shaped lifting rods 47 on both sides to move, and the two arc-shaped lifting rods 47 push the adjustment table top 2 upward.

[0037] In order to fix the adjustable table top 2 after the user lifts the adjustable table top 2 to a suitable position, as shown in FIG. Figure 2-3 As shown, the two limiting devices 5 include a limiting gear 51 fixedly connected to the outer surface of the second transmission roller 45, and the two limiting gears 51 are arranged on the side where the two limiting gears 51 are close to each other, and the side of the two limiting gears 51 away from the book stop plate 3 is provided with an L-shaped limiting rod 52 rotatably connected to the inner wall of the storage box 7. One side of the teeth of the limiting gear 51 is parallel to its own central axis, and the other side forms a certain angle with its own central axis. This is to cooperate with the L-shaped limiting rod 52, so that the L-shaped limiting rod 52 can limit the limiting gear 51, and then limit the second transmission roller 45.

[0038] Furthermore, an inclined surface 521 is provided on the upper part of the outer surface of the two L-shaped limit rods 52 near the limit gear 51. When the adjustment table 2 is lifted upward, the limit gear 51 is driven to rotate through the transmission roller 2 45. At this time, the other side of the teeth on the limit gear 51 contacts the inclined surface 521 on the L-shaped limit rod 52, so that the L-shaped limit rod 52 moves downward, so that the limit gear 51 will not be restricted by the L-shaped limit rod 52. When the user lifts the adjustment table 2 to the corresponding height, the lower part of the outer surface of the L-shaped limit rod 52 near the limit gear 51 can cooperate with one side of the teeth of the limit gear 51. At the same time, with the cooperation of the limit frame 53, the L-shaped limit rod 52 restricts the limit gear 51, and then restricts the transmission roller 2 45 fixedly connected to the limit gear 51, so that the transmission device 4 cannot rotate, and the adjustment table 2 is fixed.

[0039] Furthermore, a limit frame 53 is provided at the lower portion of the two L-shaped limit rods 52, and an L-shaped transmission rod 54 slidably connected to the inner wall of the storage box 7 is provided on the side of the two limit frames 53 away from each other, and the upper ends of the two L-shaped transmission rods 54 are slidably connected to the limit block 55, and the size and shape of the limit block 55 match the fixing groove 121.

[0040] Specifically, when the user needs to lift the adjustable table top 2, the adjustable table top 2 is driven to move upward by rotating the transmission device 4. While the transmission device 4 drives the adjustable table top 2 to lift up, it also drives the limit gear 51 to rotate. At this time, the limit block 55 is located in the fixed groove 2 121 away from the side of the arc-shaped lifting rod 47, and the inner cavity surface of the limit frame 53 is close to the side of the limit gear 51 and contacts the lower part of the outer surface of the L-shaped limit rod 52, so that the L-shaped limit rod 52 cannot move upward and can only move downward. When the user lifts the adjustable table top 2 to the corresponding position, the limit gear 51 can be limited by the L-shaped limit rod 52, so that the transmission roller 2 45 fixedly connected to the limit gear 51 cannot rotate, and the spur gear 1 46 fixedly connected to the transmission roller 2 45 cannot drive the arc-shaped lifting rod 47 to rotate, thereby fixing the adjustable table top 2.

[0041] Furthermore, when the adjustment table top 2 needs to be lowered, the limit block 55 is moved to the fixed groove 121 close to the side of the arc-shaped lifting rod 47. At this time, the limit frame 53 is driven by the L-shaped transmission rod 54 to move in the direction close to the limit gear 51, so that the L-shaped limit rod 52 is lifted upward and disengaged from the limit gear 51. At this time, the adjustment table top 2 can be lowered.

[0042] In order to facilitate lifting the adjustable table top 2, at the same time, when the adjustable table top 2 is not lifted, it fits with the fixed table top 1, such as Figure 4-5As shown, the lower end of the adjustment table top 2 is provided with a rotating shaft 21 which is slidably connected to the inner surface of the slide groove 13, and the upper end of the adjustment table top 2 is provided with an arc surface 23 on the side close to the slide rod 64. The arc surface 23 is intended to avoid contact with the end surface of the limit plate 11 when the adjustment table top 2 is lifted upward, thereby affecting the lifting of the adjustment table top 2.

[0043] In order to place the transmission device 4 and the limiting device 5, as shown in the figure, a support plate 71 is provided on the side of the inner cavity surface of the storage box 7 close to the limiting device 5. The support plate 71 is used to support the adjustable table board 2 when the adjustable table board 2 is not in the raised state. At this time, the surface of the adjustable table board 2 is flush with the upper end of the fixed table board 1, and limiting holes 72 are provided on both sides of the lower end of the inner cavity of the storage box 7. The limiting holes 72 match the size of the arc-shaped lifting rod 47. The limiting holes 72 are used for the arc-shaped lifting rod 47 to pass through the storage box 7 through the limiting holes 72 and be placed under the storage box 7 when the adjustable table board 2 is not in the raised state.

[0044] In summary, the specific implementation method is as follows: when the user needs to lift the adjustable table top 2, the user first pushes the adjustable table top 2 to move a certain distance toward the side direction close to the limit plate 11, so that a certain space is generated between the adjustable table top 2 and the fixed table top 1, which is convenient for lifting the adjustable table top 2, and then rotates the transmission device 4, so that the arc-shaped lifting rod 47 in the transmission device 4 drives the adjustable table top 2 to move upward. When the user lifts the adjustable table top 2 to the corresponding position through the transmission device 4, the limit gear 51 is restricted by the L-shaped limit rod 52, so that the transmission roller 2 45 fixedly connected to the limit gear 51 cannot rotate, and then the transmission device 4 cannot move, so that the adjustable table top 2 is fixed;

[0045] Furthermore, when it is necessary to lower the adjustable table top 2, the limit block 55 is adjusted to move the limit block 55 into the fixed groove 121 close to the side of the arc-shaped lifting rod 47, so that the limit block 55 drives the limit frame 53 to move toward the side close to the arc-shaped lifting rod 47 through the L-shaped transmission rod 54. When the limit frame 53 contacts the lower part of the L-shaped limit rod 52, the L-shaped limit rod 52 is rotated around the connecting axis between the L-shaped limit rod 52 and the fixed table top 1, so that the upper part of the L-shaped limit rod 52 is When it is out of contact with the limit gear 51, the adjusting table top 2 can be put down. After it is lowered to a certain height, the support plate 71 supports the adjusting table top 2. Then the adjusting table top 2 is manually pulled away from the limit plate 11, so that the outer surface of the adjusting table top 2 away from the limit plate 11 contacts with the fixed table top 1. Then the limit plate 11 is moved towards the direction close to the adjusting table top 2, so that the outer surface of the limit plate 11 contacts with the outer surface of the adjusting table top 2 close to the limit plate 11.

[0046] In the above embodiment, one side of the teeth of the limit gear 51 is parallel to its own central axis, and the other side forms a certain angle with its own central axis. When the adjustment table top 2 is lifted upward, the limit gear 51 is driven to rotate through the transmission roller 2 45. At this time, the other side of the teeth on the limit gear 51 contacts the inclined surface 521 on the L-shaped limit rod 52, so that the L-shaped limit rod 52 moves downward, so that the limit gear 51 will not be restricted by the L-shaped limit rod 52. When the user lifts the adjustment table top 2 to the corresponding height, the lower part of the outer surface of the L-shaped limit rod 52 close to the side of the limit gear 51 can cooperate with one side of the teeth of the limit gear 51, and at the same time, with the cooperation of the limit frame 53, the L-shaped limit rod 52 restricts the limit gear 51.

[0047] Embodiment 2

[0048] This embodiment further improves the arc-shaped lifting rod 47 in the transmission device 4 on the basis of the first embodiment. Figure 4-8 As shown, a book stop 3 is provided at the lower part of the adjustable table top 2. The book stop 3 is used to block objects placed on the surface of the adjustable table top 2 after the adjustable table top 2 is lifted up to a certain angle, so as to prevent the objects from slipping and causing losses. A lifting device 6 is provided on the side of the two limiting devices 5 close to the book stop 3. The lifting device 6 is used to push the book stop 3 to move upward.

[0049] In order to drive the lifting device 6 to move while lifting the adjustable table top 2, Figure 4 As shown, the other side of the outer surface of the arc rod 471 is provided with an arc tooth surface 2 473 , and the arc tooth surface 2 473 is used to drive the lifting device 6 to rotate when the arc lifting rod 47 moves.

[0050] In order to lift the book stop 3, Figure 5 As shown, the two lifting devices 6 include a spur gear three 61 rotatably connected to the inner wall of the storage box 7. Only half of the outer surface of the spur gear three 61 is provided with transmission teeth. This is to prevent the occurrence of tooth jamming when the arc-shaped tooth surface two 473 is meshing with the spur gear three 61. At the same time, before the adjustment table board 2 is lifted to a certain angle, there is no need for the book stop board 3 to block the items on the adjustment table board 2. The friction between the items and the adjustment table board 2 can offset the effect of sliding down. Therefore, before the arc-shaped lifting rod 47 lifts the adjustment table board 2 to a certain angle, the arc-shaped tooth surface two 473 and the spur gear three 61 are not meshed for transmission.

[0051] Furthermore, the spur gear three 61 is meshedly connected with the arc tooth surface two 473, and a transmission plate 62 is provided on the side where the two spur gears three 61 are close to each other, and a slide bar 64 is provided on the upper part of the two transmission plates 62. The outer surfaces of the two slide bars 64 are close to each other and are provided with a connecting rod 1 63 rotatably connected to the lower end of the book stop plate 3.

[0052] In order to drive the connecting rod 1 63 when the user raises and lowers the table 2, as shown in FIG. Figure 6 As shown, the two transmission plates 62 include an arc plate 621 fixedly connected to the outer surface of the spur gear three 61, a transmission rod 1 622 is arranged on the upper part of the arc plate 621, and a sliding groove 2 623 slidably connected to the outer surface of the sliding rod 64 is provided on the side of the outer surfaces of the two transmission rods 1 622 close to each other.

[0053] Specifically, when the adjustment table plate 2 is lifted upward, the connecting rod 1 63 is first driven upward by the book stop plate 3, so that the connecting rod 1 63 drives the sliding rod 64 to slide in the sliding groove 2 623. When the sliding rod 64 moves to contact the inner cavity surface of the sliding groove 2 623 on the side close to the arc disk 621, the gear on the spur gear 3 61 engages with the arc tooth surface 2 473, thereby driving the transmission disk 62 to rotate, so that the sliding rod 64 moves around the transmission disk 62 driven by the transmission disk 62, and then pushes the connecting rod 1 63 to move through the sliding rod 64. While the connecting rod 1 63 moves upward with the book stop plate 3, the book stop plate 3 is pushed upward under the action of the sliding rod 64 and the transmission disk 62.

[0054] In order to limit the book stop board 3, at the same time, when the adjustment table board 2 is not in the lifted state, the book stop board 3 is fixed, such as Figure 7 As shown, a positioning hole 22 is provided at the lower portion of the outer surface of the adjustment table top 2 for sliding connection with the outer surface of the book stop 3, and fixing grooves 24 are provided on both sides of the inner cavity surface of the positioning hole 22, and an arc surface 241 is provided at the upper portion of the side close to each other of the two fixing grooves 24.

[0055] After the adjustable table top 2 is lifted to a certain angle, the book stopper 3 can be used to block the items placed on the adjustable table top 2 to prevent them from falling and causing losses. Figure 8 As shown, the book stopper 3 includes a stopper 31, and limiting grooves 2 32 are provided on both sides of the outer surface of the stopper 31, and the inner cavities of the two limiting grooves 2 32 are provided with fixing rods 1 33, and the upper parts of the ends of the two fixing rods 1 33 that are away from each other are provided with arc surfaces 331, and the ends of the two fixing rods 1 33 that are close to each other are provided with multiple springs 34. When the book stopper 3 moves upward relative to the adjustment table plate 2, the thrust of the spring 34 is overcome by the cooperation of the arc surface 2 241 and the arc surface 3 331, and the fixing rod 1 33 is retracted into the inner cavity of the limiting groove 2 32, so that the sliding rod 64 can push the book stopper 3 to move upward.

[0056] Specifically, when the adjustable table top 2 is lifted to a certain angle under the action of the transmission device 4, the connecting rod 1 63 pushes the book stop 3 upward under the action of the transmission plate 62 and the sliding rod 64, and the book stop 3 moves upward relative to the adjustable table top 2. At this time, the fixing rod 1 33 in the inner cavity of the limiting groove 2 32 contacts the inner cavity of the fixing groove 1 24. Under the push of the sliding rod 64, the cooperation of the arc surface 241 and the arc surface 331 overcomes the thrust of the spring 34, and the fixing rod 1 33 is retracted into the inner cavity of the limiting groove 2 32, so that the sliding rod 64 can push the book stop 3 to move upward.

[0057] Furthermore, when the adjustment table 2 moves downward, the connecting rod 63, under the pull of the transmission plate 62 and the sliding rod 64, drives the book stop 3 to move downward relative to the adjustment table 2, so that the fixing rod 33 extends outward under the action of the spring 34, so that the fixing rod 33 contacts the inner cavity of the fixing groove 24, and the lower end of the fixing rod 33 and the lower surface of the inner cavity of the fixing groove 24 are both flat, so the book stop 3 can be fixed.

[0058] In summary, the specific implementation method is as follows: when the adjusting table board 2 moves upward under the push of the transmission device 4, the arc-shaped tooth surface 2 473 drives the spur gear 3 61 to rotate, so that the transmission plate 62 drives the slide bar 64 to rotate, and then the connecting rod 1 63 drives the book stopper 3 to move upward relative to the adjusting table board 2 under the drive of the transmission plate 62 and the slide bar 64. Under the push of the slide bar 64, the arc surface 2 241 cooperates with the arc surface 3 331 to overcome the thrust of the spring 34, and the fixing rod 1 33 is retracted into the inner cavity of the limiting groove 2 32, so that the book stopper 3 moves upward;

[0059] Furthermore, when the adjustment table 2 moves downward, the connecting rod 1 63, under the pull of the transmission plate 62 and the slide rod 64, drives the book stop 3 to move downward relative to the adjustment table 2, so that the fixing rod 1 33 extends outward under the action of the spring 34, so that the fixing rod 1 33 contacts the inner cavity of the fixing groove 1 24, and the lower end of the fixing rod 1 33 and the lower surface of the inner cavity of the fixing groove 1 24 are both flat, which can fix the book stop 3. At this time, the spur gear 3 61 and the arc tooth surface 2 473 are disengaged, and the spur gear 3 61 no longer rotates with the arc lifting rod 47. The connecting rod 1 63 continues to move downward driven by the book stop 3. At this time, the slide rod 64 moves in the inner cavity of the slide groove 2 623 to balance the displacement generated by the downward movement of the connecting rod 1 63.

[0060] In the above embodiment, when the adjustment table plate 2 is lifted upward, the connecting rod 1 63 is first driven to move upward through the book stop plate 3, so that the connecting rod 1 63 drives the sliding rod 64 to slide in the sliding groove 2 623. When the sliding rod 64 moves to contact the inner cavity surface of the sliding groove 2 623 on the side close to the arc disk 621, the gear on the spur gear 3 61 engages with the arc tooth surface 2 473, thereby driving the transmission disk 62 to rotate, so that the sliding rod 64 moves around the transmission disk 62 driven by the transmission disk 62, and then pushes the connecting rod 1 63 to move through the sliding rod 64. While the connecting rod 1 63 moves upward with the book stop plate 3, the book stop plate 3 is pushed upward under the action of the sliding rod 64 and the transmission disk 62.

[0061] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A reading desk with an adjustable tabletop angle, comprising a fixed tabletop (1), characterized in that: An adjustable table top (2) is arranged on the upper part of the fixed table top (1), a book stop board (3) is arranged on the lower part of the adjustable table top (2), a storage box (7) is arranged on the lower part of the fixed table top (1), a transmission device (4) is arranged in the middle of the inner cavity of the storage box (7), limiting devices (5) are arranged on both sides of the inner cavity of the storage box (7), and a lifting device (6) is arranged on the side of the two limiting devices (5) close to the book stop board (3); The inner wall of one side of the fixed table top (1) close to the limiting device (5) is slidably connected to the limiting plate (11), and limiting grooves (12) are provided on both sides of the upper end of the fixed table top (1), and the two limiting grooves (12) are provided with fixed grooves (121) on the sides close to each other, and the inner cavity surface of the fixed table top (1) is provided with a sliding groove (13) on the side close to the book stop (3), and the upper part of the inner cavity surface of the fixed table top (1) is provided with a circular arc surface (14) on the side close to the rotating shaft (21); The transmission device (4) comprises a transmission roller (41) rotatably connected to the inner wall of the storage box (7), and the end of the transmission roller (41) close to the book stop board (3) extends to the outside of the storage box (7), and the end of the transmission roller (41) extending to the outside of the storage box (7) is provided with a transmission wheel (43), and the other end of the transmission roller (41) is provided with a bevel gear (42), and the side of the bevel gear (42) away from the book stop board (3) is meshed with a bevel gear (44), and the inner wall of the bevel gear (44) is provided with a transmission roller (45) rotatably connected to the inner wall of the storage box (7), and the outer surface of the transmission roller (45) is provided with a spur gear (46) on both sides, and the two spur gears (46) are provided with arc-shaped lifting rods (47) on the side close to the book stop board (3), and the upper ends of the two arc-shaped lifting rods (47) are slidably connected to the lower end of the adjustment table board (2); The arc-shaped lifting rod (47) comprises an arc rod (471), one side of the outer surface of the arc rod (471) is provided with an arc-shaped tooth surface 1 (472), the arc-shaped tooth surface 1 (472) is meshedly connected with a spur gear 1 (46), and the other side of the outer surface of the arc rod (471) is provided with an arc-shaped tooth surface 2 (473); The two limiting devices (5) comprise limiting gears (51) fixedly connected to the outer surface of the second transmission roller (45), and the two limiting gears (51) are arranged on the side where the two limiting gears (51) are close to each other, and the side of the two limiting gears (51) away from the book stop plate (3) is provided with an L-shaped limiting rod (52) rotatably connected to the inner wall of the storage box (7), and the upper part of the side of the outer surface of the two L-shaped limiting rods (52) close to the limiting gear (51) is provided with an inclined surface (521), and the lower part of the two L-shaped limiting rods (52) is provided with a limiting frame (53), and the side of the two limiting frames (53) away from each other is provided with an L-shaped transmission rod (54) slidably connected to the inner wall of the storage box (7), and the upper ends of the two L-shaped transmission rods (54) are slidably connected to the limiting block (55), and the size and shape of the limiting block (55) match those of the second fixing groove (121); The two lifting devices (6) include a spur gear three (61) rotatably connected to the inner wall of the storage box (7), the spur gear three (61) is meshedly connected to the arc-shaped tooth surface two (473), a transmission disk (62) is provided on the side close to each other of the two spur gears three (61), a slide bar (64) is provided on the upper part of the two transmission disks (62), and a connecting rod one (63) rotatably connected to the lower end of the book stop plate (3) is provided on the side close to each other of the outer surfaces of the two slide bars (64); The two transmission plates (62) include an arc plate (621) fixedly connected to the outer surface of the spur gear (61), a transmission rod (622) is arranged on the upper part of the arc plate (621), and a sliding groove (623) is provided on the side of the outer surfaces of the two transmission rods (622) close to each other and connected to the outer surface of the sliding rod (64); The lower end of the adjustable table top (2) is provided with a rotating shaft (21) which is slidably connected to the inner surface of the slide groove (13); the lower part of the outer surface of the adjustable table top (2) is provided with a positioning hole (22) which is slidably connected to the outer surface of the book stopper (3); both sides of the inner surface of the positioning hole (22) are provided with a fixing groove (24); the upper part of the two fixing grooves (24) close to each other is provided with an arc surface (241); the upper end of the adjustable table top (2) is provided with an arc surface (23) on the side close to the slide rod (64); The book baffle (3) comprises a baffle (31), and two limiting grooves (32) are provided on both sides of the outer surface of the baffle (31), and the inner cavities of the two limiting grooves (32) are provided with fixing rods (33), and the upper parts of the ends of the two fixing rods (33) that are away from each other are provided with arc surfaces (331), and the ends of the two fixing rods (33) that are close to each other are provided with multiple springs (34).

2. A reading desk with easy-to-adjust tabletop angle according to claim 1, characterized in that: A support plate (71) is provided on one side of the inner cavity surface of the storage box (7) close to the limiting device (5), and limiting holes (72) are provided on both sides of the lower end of the inner cavity of the storage box (7), and the limiting holes (72) match the size of the arc-shaped lifting rod (47).

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