CN212617379U

CN212617379U - Flat plate support

Info

Publication number: CN212617379U
Application number: CN202020640017.4U
Authority: CN
Inventors: 方彦文
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-02-26
Anticipated expiration: 2030-04-24

Abstract

The utility model provides a plate support, it includes: the rack body unit comprises a bottom plate, an inclined plate and a support cylinder which is perpendicular to the bottom plate, wherein a placing block is arranged at the bottom of the inclined plate; the adjusting unit is arranged between the supporting cylinder and the inclined plate and comprises a height adjusting piece and an angle adjusting piece connected with the height adjusting piece, and one end of the angle adjusting piece is connected with the inclined plate. The utility model has the advantages that: the utility model discloses can adjust height and turned angle, and then adjust dull and stereotyped position height and inclination, can obtain the suitable visual angle that different users need, in addition, this utility model easy operation is convenient, and is very practical.

Description

Flat plate support

Technical Field

The utility model relates to the technical field of articles for daily use, especially, relate to a plate holder.

Background

With the continuous development of society and the continuous progress of science and technology, more and more people choose to use small-size touch-control type personal computer (panel computer), and when using, long-time flat lying needs the user to hold down to read or use, causes cervical vertebra etc. discomfort easily, consequently needs to shelve the panel computer on the support in order to obtain suitable use angle and visual angle.

The existing tablet computer support is generally a bottom supporting leg, an inclined supporting support is fixedly formed at the upper part of the tablet computer support, a tablet is placed on the supporting support when the tablet computer support is used, the inclined angle of the tablet computer is kept through the inclined angle of the supporting support, the height cannot be adjusted, and the inclined angle cannot be adjusted.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.

The utility model discloses the problem that is difficult to height-adjusting and inclination that exists in view of current plate holder has been proposed.

Therefore, the utility model discloses the technical problem that will solve can adjust dull and stereotyped right angled height and inclination to satisfy the user's of different posture user's user demand.

In order to solve the technical problem, the utility model provides a following technical scheme: the rack body unit comprises a bottom plate, an inclined plate and a support cylinder which is perpendicular to the bottom plate, wherein a placing block is arranged at the bottom of the inclined plate; the adjusting unit is arranged between the supporting cylinder and the inclined plate and comprises a height adjusting piece and an angle adjusting piece connected with the height adjusting piece, and one end of the angle adjusting piece is connected with the inclined plate.

As the utility model discloses a plate holder preferred scheme, wherein: heightening the piece including heightening the pole and with heightening the perpendicular gag lever post that sets up of pole, heightening the pole setting and being in support a section of thick bamboo in seted up spacing hole on the support a section of thick bamboo, the gag lever post passes through spacing hole stretch into to support in the section of thick bamboo.

As the utility model discloses a plate holder preferred scheme, wherein: the height-adjusting rod is provided with a containing groove along the vertical direction, a plurality of tooth blocks are uniformly distributed in the containing groove, the limiting rod is close to one end of each tooth block, a limiting end is arranged at one end of the limiting rod, a first spring is sleeved on the outer side wall of the limiting rod, one end of the first spring is connected with the limiting rod, and the other end of the first spring is abutted to the inner side wall of the supporting cylinder.

As the utility model discloses a plate holder preferred scheme, wherein: the inner side wall of the supporting cylinder is vertically provided with a sliding groove, a sliding block is fixedly arranged on the outer side wall of the heightening rod, and the sliding block is embedded in the sliding groove.

As the utility model discloses a plate holder preferred scheme, wherein: the angle adjusting piece is arranged at the top of the supporting cylinder and comprises a fixed cylinder and a fixed limiting block arranged at the end part of one end of the fixed cylinder, a first rotating hole is formed in the middle of the limiting block, a rotating rod is arranged in the first rotating hole, one end of the rotating rod is connected with the adjusting block through a bearing, the other end of the rotating rod penetrates through the first rotating hole and the pressing block, and the pressing block is fixedly connected with the inclined plate.

As the utility model discloses a plate holder preferred scheme, wherein: the stopper is provided with a plurality of spacing grooves along circumference in the inboard side the dwang is being close to a plurality of spacing of fixedly connected with on the lateral wall of the inboard department of stopper, spacing inlays and establishes the spacing inslot, the regulating block is keeping away from the one end of dwang is connected with the second spring, the other end of second spring with first fixed plate in the solid fixed cylinder links to each other.

As the utility model discloses a plate holder preferred scheme, wherein: the end part of the other end of the fixed cylinder is provided with a second fixed plate, the center of the second fixed plate is provided with a second rotating hole, a driven rod is arranged in the second rotating hole, the end part of the inner side of the driven rod is fixedly provided with a circular ring block, a third spring is connected between the circular ring block and the second fixed plate, and the other end of the driven rod is connected with the inclined plate through the pressing block.

As the utility model discloses a plate holder preferred scheme, wherein: the inclined plate side is connected with a clamping piece, the lateral parts of the two sides of the inclined plate are symmetrically provided with the placing grooves, and the clamping piece is symmetrically arranged on the two sides in the placing grooves.

As the utility model discloses a plate holder preferred scheme, wherein: the clamping piece comprises a first clamping piece and a second clamping piece connected with the first clamping piece, and the first clamping piece is connected with the inclined plate in parallel through a fourth spring arranged in the placing groove.

As the utility model discloses a plate holder preferred scheme, wherein: the second clamping piece is vertically arranged on the outer side of the first clamping piece, a connecting groove is formed in the first clamping piece, a fifth spring is arranged in the connecting groove, and the other end of the fifth spring is connected with the second clamping piece.

The utility model has the advantages that: the utility model discloses can adjust height and turned angle, and then adjust dull and stereotyped position height and inclination, can obtain the suitable visual angle that different users need, in addition, this utility model easy operation is convenient, and is very practical.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:

fig. 1 is an overall schematic view of a plate holder according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of an elevation member of a flat plate stand according to a second embodiment of the present invention;

fig. 3 is a schematic cut-away view of a position limiting element of a flat plate bracket according to a second embodiment of the present invention;

fig. 4 is a sectional view of an angle adjusting member of a flat bracket according to a third embodiment of the present invention;

fig. 5 is an exploded view of a recliner of a flat bracket according to a third embodiment of the present invention;

fig. 6 is a schematic view of a plate holder clamping member according to a fourth embodiment of the present invention;

fig. 7 is an exploded view of a tablet holder according to a fourth embodiment of the present invention.

Detailed Description

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

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Furthermore, the present invention will be described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, for convenience of illustration, the sectional view showing the device structure will not be enlarged partially according to the general scale, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Example 1

Referring to fig. 1, a first embodiment of the present invention provides a tablet holder, as shown in fig. 1, which includes: the rack unit 100 comprises a bottom plate 101, an inclined plate 102 and a support cylinder 103 which is perpendicular to the bottom plate 101, wherein a placing block 102a is arranged at the bottom of the inclined plate 102; the adjusting unit 200 is arranged between the support cylinder 103 and the inclined plate 102 and comprises an heightening part 201 and an angle adjusting part 202 connected with the heightening part 201, and one end of the angle adjusting part 202 is connected with the inclined plate 102.

Specifically, for the flat plate support, the frame unit 100 constitutes a basic frame structure, including a base plate 101, an inclined plate 102 and a support cylinder 103, the base plate 101 is a regular-shaped base plate with a certain mass for lowering the center of gravity and keeping the center of gravity stable to avoid the structural instability above from overturning, the support cylinder 103 is vertically disposed on the base plate 101, the support cylinder 103 is a cylindrical structure with a circular cross section for providing vertical height adjustment, and further, for the inclined plate 103, the main function is to rest the support flat plate, that is, the height and the inclined angle of the flat plate are realized by adjusting the height and the inclined angle of the inclined plate 103, therefore, for the inclined plate 103, one end thereof is connected with an adjusting unit 200, the height and the angular position are adjusted under the driving of the adjusting unit 200, the rest block 102a is disposed at the bottom of the inclined plate 103, and for the rest block 102a, the cross-section is the component of U-shaped for prevent that the flat board from taking place to fall owing to the effect of self gravity, more closely one step, the utility model discloses still include regulating unit 200, regulating unit 200 is used for adjusting the angle of the height and the slope of hang plate 103, as shown in fig. 1, regulating unit 200 sets up between hang plate 102 and a support cylinder 103, including heightening 201 and angle modulation 202, heightening 201 links to each other with angle modulation 202, angle modulation 202 links to each other with hang plate 102, carries out inclination's regulation through angle modulation 202 to hang plate 102, because heightening 201 links to each other with angle modulation 202, when carrying out height control through heightening 201, can drive angle modulation 202 and carry out holistic vertical movement, and then can drive hang plate 102 and carry out height adjustment, to the height and the angle adjustment of hang plate 102, adjustment between them is independent each other for relative.

Example 2

Referring to fig. 2 to 3, a second embodiment of the present invention is different from the first embodiment in that: heightening piece 201 includes heightening pole 201a and the gag lever post 201b that sets up with heightening pole 201a is perpendicular, and heightening pole 201a sets up in a support section of thick bamboo 103, has seted up spacing hole 103a on a support section of thick bamboo 103, and gag lever post 201b stretches into in the support section of thick bamboo 103 through spacing hole 103 a. The height-adjusting rod 201a is provided with a containing groove 201a-1 along the vertical direction, a plurality of tooth blocks 201a-2 are uniformly distributed in the containing groove 201a-1, a limiting end 201b-1 is arranged at one end, close to the tooth blocks 201a-2, of the limiting rod 201b, a first spring 201b-2 is sleeved on the outer side wall of the limiting rod 201b, one end of the first spring 201b-2 is connected with the limiting rod 201b, and the other end of the first spring is abutted to the inner side wall of the supporting cylinder 103. The inner side wall of the supporting cylinder 103 is vertically provided with a sliding groove 103b, the outer side wall of the heightening rod 201a is fixedly provided with a sliding block 201a-3, and the sliding block 201a-3 is embedded in the sliding groove 103 b.

Specifically, for the height adjusting member 201, it is mainly used for height adjustment, as shown in fig. 2, the height adjusting member 201 includes a height adjusting rod 201a and a limiting rod 201b, the height adjusting rod 201a is disposed in the supporting cylinder 103, that is, the height adjusting rod 201a is vertically disposed, the height adjusting rod 201a has a shape and size adapted to the supporting cylinder 103, that is, the height adjusting rod 201a can move up and down in the supporting cylinder 103, so as to achieve height adjustment, for the limiting rod 201b, it is mainly used for limiting the position of the height adjusting rod 201a, the limiting rod 201b is a cylindrical rod body with a circular cross section, as shown in fig. 2, a limiting hole 103a is disposed on the side wall of the supporting cylinder 103, the limiting hole 103a has a size adapted to the limiting rod 201b, that the limiting rod 201b can extend into the supporting cylinder 103 through the limiting hole 103a, it should be noted that, for the limiting rod 201b forms an enlarged end at one end outside the supporting cylinder 103a, the operation is convenient.

Furthermore, in order to limit the height-adjusting rod 201a, an accommodating groove 201a-1 is formed in one end of the height-adjusting rod 201a close to the limiting rod 201b along the vertical direction, a plurality of tooth blocks 201a-2 are uniformly distributed in the accommodating groove 201a-1, as shown in fig. 3, the cross section of each tooth block 201a-2 is triangular, a certain distance exists between every two adjacent tooth blocks 201a-2, a limiting end 201b-1 is connected to one end of the limiting rod 201b extending into the supporting cylinder 103, the size radius of the limiting end 201b-1 is smaller than the distance between every two adjacent tooth blocks 201a-2, in addition, a first spring 201b-2 is sleeved on the outer side wall of the limiting rod 201b, and it should be noted that the spring 201b-2 is sleeved on part of the outer side wall of the rod body of the limiting rod 201b, that is, one end of the first spring 201b-2 is fixedly connected with the limiting rod 201b (fixedly connected to the end of the limiting rod 2) and the other end of the first spring 201b-2 is abutted against the inner side wall of the support 103, for the first spring 201b-2, the first spring is a compressed spring, namely, the elastic restoring force always exists, so that the limiting rod 201b is clamped between two adjacent tooth blocks 201a-2, because the tooth blocks 201a-2 are triangular, when the height-adjusting rod 201a moves upwards, the inclined sides of the triangles can extrude the limiting rod 201b, at the moment, the first spring 201b-2 continues to compress, when the limiting rod 201b completely passes over a certain tooth block 201a-2, the tooth blocks 201a-2 do not extrude the limiting rod 201b, the elastic restoring force of the first spring 201b-2 enables the limiting rod 201b to be clamped below the triangular side of the tooth block 201a-2 to support and limit the height-adjusting rod 201a, when the height-adjusting rod 201a moves downwards, at the moment, the limiting rod 201b is pulled outwards only by utilizing the enlarged end part of the limiting rod 201b, at this time, the first spring 201b-2 is continuously compressed, the limiting rod 201b is separated from the tooth block 201a-2, the height-adjusting rod 201a automatically falls under the action of gravity after the vertical constraint is released, in order to enable the height-adjusting rod 201a to move along a preset track, a sliding groove 103b is formed in the inner side wall of the supporting cylinder 103 along the vertical direction, a corresponding sliding block 201a-3 is fixedly arranged on the outer side wall of the height-adjusting rod 201a along the vertical direction, and the sliding block 201a-3 is embedded in the sliding groove 103b to perform necessary sliding adjustment.

Example 3

Referring to fig. 4 and 5, a third embodiment of the present invention is different from the above embodiments in that: the angle adjusting piece 202 is arranged on the top of the supporting cylinder 103 and comprises a fixed cylinder 202a and a limiting block 202b fixedly arranged at one end of the fixed cylinder 202a, a first rotating hole 202b-1 is formed in the middle of the limiting block 202b, a rotating rod 202c is arranged in the first rotating hole 202b-1, one end of the rotating rod 202c is connected with an adjusting block 202d through a bearing, the other end of the rotating rod 202c penetrates through the first rotating hole 202b-1 to be connected with a pressing block 202e, and the pressing block 202e is fixedly connected with the inclined plate 102. The limiting block 202b is provided with a plurality of limiting grooves 202b-2 along the circumferential direction on the inner side surface, the outer side wall of the rotating rod 202c close to the inner side of the limiting block 202b is fixedly connected with a plurality of limiting strips 202c-1, the limiting strips 202c-1 are embedded in the limiting grooves 202b-2, one end of the adjusting block 202d far away from the rotating rod 202c is connected with a second spring 202f, and the other end of the second spring 202f is connected with a first fixing plate 202a-1 in the fixing cylinder 202 a.

Specifically, as shown in fig. 4, for the angle adjustment of the inclined plate 102, the angle adjusting member 202 is disposed on the top of the supporting cylinder 103, and includes a fixed cylinder 202a fixedly connected to the supporting cylinder 103, the fixed cylinder 202a is vertically connected to the supporting cylinder 103, and has an inner hollow cylinder structure with a circular cross section, a limit block 202b is disposed at one end of the fixed cylinder 202a, the shape of the limit block 202b is the same as that of the fixed cylinder 202a, a first rotation hole 202b-1 is disposed at the middle of the limit block 202b, the first rotation hole 202b-1 is a through hole penetrating through the limit block 202b, a rotation rod 202c is disposed in the first rotation hole 202b-1, the rotation rod 202c has a rod structure with a circular cross section, one end of the rotation rod 202c penetrates through the first rotation hole 202b-1, the other end of the rotation rod 202c extends into the fixed cylinder 202a and is connected to an adjusting block 202d disposed in the fixed cylinder 202a through a bearing at the end, that is, the rotating rod 202c can rotate on the adjusting block 202d through a bearing, it should be noted that the adjusting block 202d has the same shape as the fixed cylinder 202a, the end of the rotating rod 202c extending to the outside is fixedly connected with the pressing block 202e, the pressing block 202e is fixedly connected with the inclined plate 102, and the rotating rod 202c rotates to drive the inclined plate 102 to rotate together, so as to realize angle adjustment.

Further, when the inclined plate 102 is rotated to a suitable angle by the rotating rod 202c, the rotating rod 202c needs to be fixed, as shown in fig. 5, a plurality of limiting grooves 202b-2 are circumferentially arranged on the inner side surface of the limiting block 202b, correspondingly, a plurality of limiting strips 202c-1 are circumferentially arranged on the outer side wall of the rotating rod 202c close to the inner side wall of the limiting block 202b, the limiting strips 202c-1 can be clamped in the limiting grooves 202b-2, because the limiting block 202c is fixedly connected to the fixed cylinder 202a, when the limiting strips 202c-1 are clamped in the limiting grooves 202b-2, the rotating rod 202c cannot relatively rotate to realize fixation, and simultaneously, in order to realize that the limiting strips 202c-1 are clamped in the limiting grooves 202b-2 when necessary, the rotating rod 202c is fixed for limiting during use, as shown in the figure, the adjusting block 202d is provided with a second spring 202f at one end far away from the rotating rod 202c, the other end of the second spring 202f is connected with the first fixing plate 202a-1, that is, two ends of the second spring 202f are respectively connected with the adjusting block 202d and the first fixing plate 202a-1, for the second spring 202f, it is a compressed spring, that is, there is an elastic force for recovering elastic deformation, so that the limiting strip 202c-1 is clamped in the limiting groove 202b-2, thereby the position can be kept stable when no rotation occurs, when an angle needs to be adjusted, the pressing block 202e is directly pushed to one end close to the first fixing plate 202a-1 (at this time, an external force such as pushing by a hand is needed), at this time, the limiting strip 202c-1 is separated from the limiting groove 202b-2, the rotating rod 202c can rotate, thereby driving the inclined plate 102 to rotate, when the pushing is not performed, the position limiting strip 202c-1 is clamped in the position limiting groove 202b-2 again to perform position fixing under the elastic force of the second spring 202 f.

A second fixing plate 202a-2 is arranged at the other end of the fixing cylinder 202a, a second rotating hole 202a-21 is arranged at the center of the second fixing plate 202a-2, a driven rod 202g is arranged in the second rotating hole 202a-21, an annular block 202g-1 is fixedly arranged at the end of the inner side of the driven rod 202g, a third spring 202h is connected between the annular block 202g-1 and the second fixing plate 202a-2, and the other end of the driven rod 202g is connected with the inclined plate 102 through a pressing block 202 e.

In order to ensure that the rotating rod 202c can keep stable balance when the driven inclined plate 102 rotates or keeps stable position, the other end of the fixed cylinder 202a is provided with a second fixed plate 202a-2, the center of the second fixed plate 202a-2 is provided with a second rotating hole 202a-21, a driven rod 202g is arranged in the second rotating hole 202a-21, the shape and size of the driven rod 202g are matched with the second rotating hole 202a-21, the driven rod 202g extends into the fixed cylinder 202a from the second rotating hole 202a-21, one end of the driven rod 202g extending into the inner side is fixedly provided with a ring block 202g-1, the size and radius of the ring block 202g-1 are larger than the radius of the rod body part of the driven rod 202g, and a third spring 202h is connected between the ring block 202g-1 and the second fixed plate 202a-2, that is, the driven rod 202g can move in a certain range, and the end of the driven rod 202g outside the fixed cylinder 202a is connected to the inclined plate 102 through the pressing block 202e, that is, when the inclined plate 102 is pushed to move, the driven rod 202g drives the third spring 202h to perform compression movement, and after the pushing is released, the third spring 202h pushes the driven rod 202g to the original horizontal position to keep the position stable.

Example 4

Referring to fig. 6 and 7, a fourth embodiment of the present invention is different from the above embodiments in that: the side of the inclined plate 102 is connected with a clamping piece 203, the lateral parts of the two sides of the inclined plate 102 are symmetrically provided with resting grooves 102b, and the clamping piece 203 is symmetrically arranged in the resting grooves 102b of the two sides. The clamp 203 includes a first clamp 203a and a second clamp 203b connected to the first clamp 203a, and the first clamp 203a is connected in parallel with the inclined plate 102 by a fourth spring 102c provided in the rest groove 102 b. The second clamping piece 203b is vertically arranged on the outer side of the first clamping piece 203a, a connecting groove 203a-1 is formed in the first clamping piece 203a, a fifth spring 203a-2 is arranged in the connecting groove 203a-1, and the other end of the fifth spring 203a-2 is connected with the second clamping piece 203 b.

For the inclined plate 102, which is used for realizing the holding and fixing of a flat plate or book, in order to realize the fixing of flat plates or books with different sizes or thicknesses, a clamping piece 203 is connected to the side edge of the inclined plate 102, as shown in fig. 6 and 7, resting grooves 102b are symmetrically arranged on the two side edges of the inclined plate 102, the clamping piece 203 is correspondingly arranged in the resting grooves 102b, for the clamping piece 203a, in order to adapt to different sizes (mainly length direction and thickness direction, width direction is directly resting on the resting block 102a), the clamping piece 203 is divided into a first clamping piece 203a and a second clamping piece 203b which is arranged perpendicular to the first clamping piece 203a, the first clamping piece 203a is arranged in the resting grooves 102b in parallel, a fourth spring 102c is connected between the first clamping piece 203a and the inner notch of the resting groove 102b, that is, the first clamping member 203a can contract to a certain length to adapt to flat plates or books with different lengths, a connecting groove 203a-1 is formed in a part of the plate body of the first clamping member 203a extending out of the placement groove 102b, a fifth spring 203a-2 is arranged in the connecting groove 203a-1, two ends of the fifth spring 203a-2 are respectively connected with the first clamping member 203a and the second clamping member 203b, and the second clamping member 203b can stretch to a certain degree, so that flat plates with different thicknesses can be clamped.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. A plate holder, characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the rack body unit (100) comprises a bottom plate (101), an inclined plate (102) and a supporting cylinder (103) which is perpendicular to the bottom plate (101), wherein a placing block (102a) is arranged at the bottom of the inclined plate (102);

the adjusting unit (200) is arranged between the supporting cylinder (103) and the inclined plate (102) and comprises a height adjusting piece (201) and an angle adjusting piece (202) connected with the height adjusting piece (201), and one end of the angle adjusting piece (202) is connected with the inclined plate (102).

2. The tablet holder of claim 1, wherein: heightening piece (201) including heightening pole (201a) and with heightening pole (201a) perpendicular setting's gag lever post (201b), heightening pole (201a) sets up support section of thick bamboo (103) in, support section of thick bamboo (103) on seted up spacing hole (103a), gag lever post (201b) pass through spacing hole (103a) stretch into support section of thick bamboo (103) in.

3. The tablet holder of claim 2, wherein: a containing groove (201a-1) is formed in the height adjusting rod (201a) in the vertical direction, a plurality of tooth blocks (201a-2) are uniformly distributed in the containing groove (201a-1), a limiting end head (201b-1) is arranged at one end, close to the tooth blocks (201a-2), of the limiting rod (201b), a first spring (201b-2) is sleeved on the outer side wall of the limiting rod (201b), one end of the first spring (201b-2) is connected with the limiting rod (201b), and the other end of the first spring abuts against the inner side wall of the supporting cylinder (103).

4. A plate holder according to claim 2 or 3, wherein: the inner side wall of the supporting cylinder (103) is vertically provided with a sliding groove (103b), the outer side wall of the height adjusting rod (201a) is fixedly provided with a sliding block (201a-3), and the sliding block (201a-3) is embedded in the sliding groove (103 b).

5. The tablet holder of claim 4, wherein: the angle adjusting piece (202) is arranged at the top of the supporting cylinder (103) and comprises a fixed cylinder (202a) and a limit block (202b) which is fixedly arranged at the end part of one end of the fixed cylinder (202a), a first rotating hole (202b-1) is formed in the middle of the limit block (202b), a rotating rod (202c) is arranged in the first rotating hole (202b-1), one end of the rotating rod (202c) is connected with an adjusting block (202d) through a bearing, the other end of the rotating rod penetrates through the first rotating hole (202b-1) and a pressing block (202e), and the pressing block (202e) is fixedly connected with the inclined plate (102).

6. The tablet holder of claim 5, wherein: the limiting block (202b) is provided with a plurality of limiting grooves (202b-2) along the circumference in the inboard side the dwang (202c) is being close to a plurality of spacing strips (202c-1) of fixedly connected with on the lateral wall of limiting block (202b) inboard department, spacing strip (202c-1) are inlayed and are established in limiting groove (202b-2), regulating block (202d) is keeping away from the one end of dwang (202c) is connected with second spring (202f), the other end of second spring (202f) with first fixed plate (202a-1) in fixed cylinder (202a) link to each other.

7. The plate holder of claim 5 or 6, wherein: a second fixing plate (202a-2) is arranged at the end of the other end of the fixing cylinder (202a), a second rotating hole (202a-21) is formed in the center of the second fixing plate (202a-2), a driven rod (202g) is arranged in the second rotating hole (202a-21), an annular block (202g-1) is fixedly arranged at the end of the inner side of the driven rod (202g), a third spring (202h) is connected between the annular block (202g-1) and the second fixing plate (202a-2), and the other end of the driven rod (202g) is connected with the inclined plate (102) through the pressing block (202 e).

8. The tablet holder of claim 7, wherein: the side edge of the inclined plate (102) is connected with a clamping piece (203), the side parts of two sides of the inclined plate (102) are symmetrically provided with a placing groove (102b), and the clamping piece (203) is symmetrically arranged in the placing grooves (102b) of two sides.

9. The tablet holder of claim 8, wherein: the clamping piece (203) comprises a first clamping piece (203a) and a second clamping piece (203b) connected with the first clamping piece (203a), and the first clamping piece (203a) is connected with the inclined plate (102) in parallel through a fourth spring (102c) arranged in the resting groove (102 b).

10. The tablet holder of claim 9, wherein: the second clamping piece (203b) is vertically arranged on the outer side of the first clamping piece (203a), a connecting groove (203a-1) is formed in the first clamping piece (203a), a fifth spring (203a-2) is arranged in the connecting groove (203a-1), and the other end of the fifth spring (203a-2) is connected with the second clamping piece (203 b).