CN114376333B

CN114376333B - Auxiliary writing device

Info

Publication number: CN114376333B
Application number: CN202210079213.2A
Authority: CN
Inventors: 金聪; 金松桓
Original assignee: Jiyang College of Zhejiang A&F University
Current assignee: Zhuji Shuting Textile Co ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2023-03-24
Anticipated expiration: 2042-01-24
Also published as: CN114376333A

Abstract

The invention discloses an auxiliary writing device, which relates to the technical field of writing and comprises a base, a hydraulic rod, a fixed rod, a protection plate, a square plate and a supporting block, wherein the hydraulic rod is fixedly connected to the top of the base, the fixed rod is arranged on the inner surface of the top end of the hydraulic rod, the auxiliary writing device can be used as a fixed point and a supporting point of the supporting block through a cylindrical rod, so that the supporting block can achieve an inclined effect, and is convenient for people who are used for writing on an inclined desktop to use.

Description

Auxiliary writing device

Technical Field

The invention belongs to the technical field of writing, and particularly relates to an auxiliary writing device.

Background

Because the high difference of user so also diverse to the demand of desktop height, also avoid having the user to like the condition of writing on the desktop of slope yet, but can't reach the effect that makes the desktop go on inclining by the writing device of height-adjusting on the market at present, and because the pen is mostly cylindrical, so lead to being difficult for placing on the desktop, the subaerial condition that drops often can appear, not only can influence writing work to a certain extent, still can make the pen because be nib and ground contact, thereby lead to the condition emergence that the pen appears damaging, we have proposed an auxiliary writing device for this.

Disclosure of Invention

The invention aims to provide an auxiliary writing device, which solves the existing problems through a cylindrical rod.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to an auxiliary writing device which comprises a base, a hydraulic rod, fixing rods, protection plates, square plates and supporting blocks, wherein the hydraulic rod is fixedly connected to the top of the base;

the supporting block comprises a first fixing block, a concave block, a fixing plate and a cylindrical rod, the first fixing block is fixedly connected to the upper end of the inner wall of the supporting block, the concave block is fixedly connected to the outer surface of the first fixing block, the fixing plate is fixedly connected to the left end and the right end of the inner wall of the supporting block, the cylindrical rod is arranged at a middle shaft in the supporting block, and the concave block is fixedly connected with the fixing plate through a fourth fixing block;

the cylinder pole includes arc pole, fixed block two, connecting rod, connecting block one, gag lever post one, arc piece one and arc piece two, the inside left and right sides of cylinder pole is provided with the spout, arc pole fixed connection is inside the spout, two the opening has been seted up to the one side that the spout was kept away from each other, two sliding connection of fixed block are inside the opening, the inside ring channel that is provided with of cylinder pole, the connecting rod sets up the inside left and right sides at the ring channel, both ends fixedly connected with connecting block one about the connecting rod, the one end of connecting rod is kept away from at connecting block one to gag lever post fixed mounting, arc piece one sliding connection is at the cylinder pole surface, two fixed connection of arc piece are in the one end of arc piece two of keeping away from at arc piece.

Furthermore, the front side and the back side of the cylindrical rod are fixedly connected with a first positioning rod, one end of the first positioning rod, far away from the cylindrical rod, is fixedly connected with the square plate, the diameter of the first positioning rod is smaller than that of the cylindrical rod, a notch is formed in the outer surface of the first arc-shaped block, and the front end and the back end of the first limiting rod are fixedly connected with the front end and the back end of the inner wall of the notch;

and one end of the second arc block, which is far away from the cylindrical rod, is fixedly connected with the fixed plate.

Furthermore, the left end of the fixed block II is connected to the outer surface of the arc-shaped rod in a sliding mode, the right end of the fixed block II is fixedly connected with the connecting rod, the upper end and the lower end of the fixed block II are fixedly connected with a spring I and a spring II, the spring I and the spring II are both sleeved on the outer surface of the arc-shaped rod, and one ends, far away from the fixed block II, of the spring I and the spring II are fixedly connected with the inner wall of the sliding groove;

the inner surface of the second arc-shaped block is in mutual contact with the outer surface of the cylindrical rod.

Further, the inner part of the supporting block comprises a first rotating shaft, an arc-shaped plate, a second rotating shaft and a T-shaped rod, a semicircular groove is formed in the outer surface of the right side of the supporting block, the first rotating shaft is rotatably connected to the left side and the right side of the inner wall of the semicircular groove, the arc-shaped plate is fixedly connected to the outer surface of the first rotating shaft, an arc-shaped opening is formed in the outer surface of the arc-shaped plate, the second rotating shaft is rotatably connected to the inner part of the arc-shaped opening, arc-shaped grooves are formed in the left side and the right side of the semicircular groove, and the T-shaped rod is slidably connected to the inner part of the arc-shaped groove;

and a third spring is fixedly mounted at the bottom of the T-shaped rod, and the bottom of the third spring is fixedly connected with the bottom of the inner wall of the arc-shaped groove.

Further, the arc plate comprises an arc block four, a support rod, an arc block three, a square block, a rubber block, clamping blocks, push rods and limiting blocks, the arc block four is fixedly connected to the inner surface of the arc plate, the support rod is arranged on the left side and the right side of the outer surface of the arc block four, the arc block three is arranged at one end, far away from the arc block four, of the support rod, the square block is fixedly installed on one side, far away from the support rod, of the arc block three, the rubber block is fixedly connected to the bottom of the square block, clamping grooves are formed in the top of the arc block four, the number of the clamping blocks is two, the two clamping blocks are slidably connected to the inside of the clamping grooves, the push rods are fixedly connected to one side, far away from each other, of the two clamping blocks, and the limiting blocks are fixedly connected to one side, far away from the two support rods;

the push rod is arc-shaped, and one side of the push rod, which is far away from the clamping block, penetrates through the limiting block and extends into the supporting rod.

Furthermore, one end of the T-shaped rod, which is far away from the arc-shaped groove, is fixedly connected to the outer surface of the rotating shaft, the support rod is rotatably connected with the arc-shaped block tee through the rotating shaft III, and the support rod is rotatably connected with the arc-shaped block tee through the rotating shaft IV;

and a spring IV is fixedly arranged on one side of each clamping block, which is close to each other.

Furthermore, the number of the rubber blocks is three, the three rubber blocks are all semicircular, the size and the shape of the fixture blocks are the same as those of the inner wall of the clamping groove, and the sides, far away from each other, of the two fixture blocks are respectively contacted with the left side and the right side of the inner wall of the clamping groove;

the inner surface of the arc plate is provided with a receiving opening, and the size and the shape of the receiving opening are the same as those of the limiting block.

Furthermore, the concave block comprises a second positioning rod, supporting top plates, V-shaped clamping plates, four limiting rods and clamping plates, the second positioning rod is fixedly installed inside a concave block notch, the supporting top plates are fixedly connected to the outer surfaces of the positioning rods, the number of the supporting top plates is four, the two supporting top plates are fixedly connected with the V-shaped clamping plates on one sides close to each other, the two limiting rods are arranged on the left side and the right side of the second positioning rod, and the four supporting top plates are fixedly connected with the clamping plates on one sides far away from each other.

Furthermore, the top end of the supporting top plate positioned at the upper end is fixedly connected with the bottom of the first fixed block, and the bottom end of the supporting top plate positioned at the lower end is fixedly connected with the bottom of the inner wall of the concave block notch;

and the upper end and the lower end of the second limiting rod penetrate through the V-shaped clamping plate and the supporting top plate to be fixedly connected with the clamping plate.

The invention has the following beneficial effects:

the cylindrical rod can be used as a fixed point and a supporting point of the supporting block, so that the supporting block can achieve an inclined effect to be convenient for people who are used for writing on an inclined desktop to use, the limiting rod I can achieve a limiting effect on the arc-shaped block II, the limiting arc-shaped block I can achieve the effect of limiting the arc-shaped block I, the position change of the limiting rod I in the inclined process can be transmitted to the fixing block II through the connecting rod, the fixing block two pairs of springs I can extrude and stretch the spring II, and the supporting block can incline and can support the top and bear pressure.

According to the invention, through the supporting block, the writing pen can be stored, so that the writing pen is prevented from being damaged and other adverse phenomena caused by rolling off from the left surface on the ground, the situation that writing personnel need to bend down to pick up the writing pen is also avoided, the protection of the writing pen is improved and the resource waste is reduced, through the first rotating shaft, the arc-shaped plate can rotate in position under the pushing influence of the T-shaped rod, and the effect of limiting and fixing writing pens with different thicknesses is achieved.

According to the invention, through the arc-shaped plate, the position of the writing pen can be further adjusted according to the thickness of the writing pen so as to be fixed, and meanwhile, the writing pen is prevented from shaking in the semicircular groove.

According to the invention, the top of the supporting block can be supported by force through the concave block, and the top of the supporting block needs to bear pressure from a writer for a long time, so that the first fixing block is supported by the concave block to increase the intensity of the pressure and the hardness of the fixing block, and the fixing effect between the supporting top plates can be increased through the V-shaped clamping plate on one hand, and the pressure borne by the supporting top plates can be supported on the other hand, so that the fixing effect is improved to a certain extent.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings 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 the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the support block of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is an enlarged view of a portion B of FIG. 2 according to the present invention;

FIG. 5 is an enlarged view of a portion of C of FIG. 4 according to the present invention;

FIG. 6 is a schematic view of the internal structure of the female block of the present invention;

FIG. 7 is an enlarged view of a portion of D in FIG. 6 according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a base; 2. a hydraulic rod; 3. fixing the rod; 4. a protection plate; 5. a square plate; 6. a support block; 11. a first rotating shaft; 12. an arc-shaped plate; 121. an arc-shaped block IV; 122. a strut; 123. an arc-shaped block III; 124. a square block; 125. a rubber block; 126. a clamping block; 127. a push rod; 128. a limiting block; 13. a second rotating shaft; 14. a T-shaped rod; 61. a first fixing block; 62. a concave block; 621. a second positioning rod; 622. supporting a top plate; 623. a V-shaped clamping plate; 624. a second limiting rod; 625. clamping a plate; 63. a fixing plate; 64. a cylindrical rod; 641. an arcuate bar; 642. a second fixed block; 643. a connecting rod; 644. a first connecting block; 645. a first limiting rod; 646. a first arc-shaped block; 647. and a second arc block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

Referring to fig. 1-7, the invention relates to an auxiliary writing device, which comprises a base 1, a hydraulic rod 2, a fixing rod 3, a protection plate 4, square plates 5 and supporting blocks 6, wherein the hydraulic rod 2 is fixedly connected to the top of the base 1, the fixing rod 3 is arranged on the inner surface of the top end of the hydraulic rod 2, the protection plate 4 is fixedly connected to the left end and the right end of the fixing rod 3, the square plates 5 are fixedly connected to the top of the protection plate 4, and the supporting blocks 6 are arranged on the sides, close to each other, of the two square plates 5;

the supporting block 6 comprises a first fixing block 61, a concave block 62, a fixing plate 63 and a cylindrical rod 64, the first fixing block 61 is fixedly connected to the upper end of the inner wall of the supporting block 6, the concave block 62 is fixedly connected to the outer surface of the first fixing block 61, the fixing plate 63 is fixedly connected to the left end and the right end of the inner wall of the supporting block 6, the cylindrical rod 64 is arranged at a middle shaft in the supporting block 6, and the concave block 62 and the fixing plate 63 are fixedly connected through a fourth fixing block;

the cylindrical rod 64 comprises an arc-shaped rod 641, a fixed block II 642, a connecting rod 643, a connecting block 644, a limiting rod 645, an arc-shaped block 646 and an arc-shaped block 647, sliding grooves are formed in the left side and the right side of the inside of the cylindrical rod 64, the arc-shaped rod 641 is fixedly connected inside the sliding grooves, an opening is formed in one side, far away from the two sliding grooves, the fixed block II 642 is slidably connected inside the opening, an annular groove is formed in the inside of the cylindrical rod 64, the connecting rod 643 is arranged on the left side and the right side of the inside of the annular groove, the connecting block 644 is fixedly connected to the upper end and the lower end of the connecting rod 643, the limiting rod 645 is fixedly installed at one end, far away from the connecting rod 643, the arc-shaped block II 647 is fixedly connected to one end, far away from the arc-shaped block II 647, the cylindrical rod 64 can serve as a fixed point and a supporting point of the supporting block 6, the supporting block 6 can achieve an inclined effect, so that people who are used for writing on an inclined desktop can conveniently use, the arc-shaped block 647, the limiting effect of the arc-shaped block II 647 is achieved by limiting the arc-shaped block II 646.

The front side and the back side of the cylindrical rod 64 are fixedly connected with a first positioning rod, one end of the first positioning rod, far away from the cylindrical rod 64, is fixedly connected with the square plate 5, the diameter of the first positioning rod is smaller than that of the cylindrical rod 64, a notch is formed in the outer surface of the first arc-shaped block 646, the front end and the back end of the first limiting rod 645 are fixedly connected with the front end and the back end of the inner wall of the notch, and the first positioning rod can position and fix the cylindrical rod 64 at a fixed position;

one end of the second arc-shaped block 647 far away from the cylindrical rod 64 is fixedly connected with the fixing plate 63.

The left end of the second fixed block 642 is slidably connected to the outer surface of the arc-shaped rod 641, the right end of the second fixed block 642 is fixedly connected with the connecting rod 643, the upper end and the lower end of the second fixed block 642 are fixedly connected with the first spring and the second spring, the first spring and the second spring are both sleeved on the outer surface of the arc-shaped rod 641, one ends, far away from the second fixed block 642, of the first spring and the second spring are fixedly connected with the inner wall of the sliding groove, through the connecting rod 643, the position change of the first limiting rod 645 during inclination can be transmitted to the second fixed block 642, so that the first spring is extruded and stretched by the second fixed block 642, and the supporting block 6 can incline and can have supporting force on the top and bear pressure;

the inner surface of the two arc-shaped blocks 647 contacts the outer surface of the cylindrical rod 64.

The inner part of the supporting block 6 comprises a first rotating shaft 11, an arc-shaped plate 12, a second rotating shaft 13 and a T-shaped rod 14, a semicircular groove is formed in the outer surface of the right side of the supporting block 6, the first rotating shaft 11 is rotatably connected to the left side and the right side of the inner wall of the semicircular groove, the arc-shaped plate 12 is fixedly connected to the outer surface of the first rotating shaft 11, an arc-shaped opening is formed in the outer surface of the arc-shaped plate 12, the second rotating shaft 13 is rotatably connected to the inner part of the arc-shaped opening, arc-shaped grooves are formed in the left side and the right side of the semicircular groove, the T-shaped rod 14 is slidably connected to the inner part of the arc-shaped groove, through the supporting block 6, the writing pen can be stored and prevented from falling from the left side, so that the writing pen is damaged and other adverse phenomena are caused, the writing pen is avoided, the situation that a writing worker needs to bend over and pick up is avoided, the protection performance of the writing pen and the resource waste are improved, and the arc-shaped plate 12 can be rotated in position under the pushing influence of the first rotating shaft 11, so that the writing pens with different thicknesses can be limited and fixed at the same time;

and a third spring is fixedly installed at the bottom of the T-shaped rod 14, and the bottom of the third spring is fixedly connected with the bottom of the inner wall of the arc-shaped groove.

The arc-shaped plate 12 comprises an arc-shaped block four 121, a support rod 122, an arc-shaped block three 123, a square block 124, a rubber block 125, a fixture block 126, a push rod 127 and a limiting block 128, the arc-shaped block four 121 is fixedly connected to the inner surface of the arc-shaped plate 12, the support rod 122 is arranged on the left side and the right side of the outer surface of the arc-shaped block four 121, the arc-shaped block three 123 is arranged at one end, far away from the arc-shaped block four 121, of the support rod 122, the square block 124 is fixedly arranged on one side, far away from the support rod 122, of the arc-shaped block three 123, the rubber block 125 is fixedly connected to the bottom of the square block 124, clamping grooves are formed in the top of the arc-shaped block four 121, the number of the fixture blocks 126 is two, the two fixture blocks 126 are slidably connected to the inside the clamping grooves, the push rod 127 is fixedly connected to one side, far away from each other, the limiting block 128 is fixedly connected to one side, through the arc-shaped plate 12, the position adjustment can be further carried out according to the thickness of the writing pen so as to fix the writing pen, and the situation that the writing pen can shake in a semicircular groove can be avoided;

the push rod 127 is arc-shaped, one side of the push rod 127, far away from the clamping block 126, penetrates through the limiting block 128 and extends into the supporting rod 122, through the push rod 127, when the supporting effect on the supporting rod 122 is achieved, force generated when the supporting rod 122 moves outwards can be transmitted to the clamping block 126, so that the clamping block 126 extrudes the spring IV, the force is born, meanwhile, the force rebounded by the spring IV can be fed back to the push rod 127, and therefore the limiting effect on the writing pen is further improved.

One end of the T-shaped rod 14, which is far away from the arc-shaped groove, is fixedly connected to the outer surface of the second rotating shaft 13, the support rod 122 is rotatably connected with the fourth arc-shaped block 121 through the third rotating shaft, and the support rod 122 is rotatably connected with the third arc-shaped block 123 through the fourth rotating shaft;

a spring four is fixedly arranged on one side of the two clamping blocks 126 close to each other.

The number of the rubber blocks 125 is three, the three rubber blocks 125 are all semicircular, the sizes and the shapes of the fixture blocks 126 are the same as those of the inner wall of the clamping groove, one sides, far away from each other, of the two fixture blocks 126 are respectively contacted with the left side and the right side of the inner wall of the clamping groove, through the rubber blocks 125, on one hand, a writing pen can be clamped and limited more conveniently through the characteristics of a self flexible material, and on the other hand, the reaction force generated when the writing pen is contacted can be transmitted to the square block 124;

the inner surface of the arc-shaped plate 12 is provided with a receiving opening, and the size and shape of the receiving opening are the same as those of the limiting block 128.

Concave type piece 62 includes two 621 of locating lever, support roof 622, V-arrangement cardboard 623, two 624 and cardboard 625 of gag lever post, two 621 fixed mounting of locating lever are inside concave type piece 62 recess, support roof 622 fixed connection is at two 621 surfaces of locating lever, support roof 622 quantity is four, two one side fixedly connected with V-arrangement cardboard 623 that support roof 622 is close to each other, gag lever post two 624 sets up in the two 621 left and right sides of locating lever, four one side fixedly connected with cardboard 625 that support roof 622 was kept away from each other, through concave type piece 62, can receive power to supporting shoe 6 top and support, because supporting shoe 6 top needs to bear the pressure that comes from the writing people for a long time, so support fixed block 61 through concave type piece 62, increase degree intensity and the hard degree of self to pressure.

The top end of the supporting top plate 622 at the upper end is fixedly connected with the bottom of the first fixing block 61, and the bottom end of the supporting top plate 622 at the lower end is fixedly connected with the bottom of the inner wall of the concave block 62 notch;

v-arrangement cardboard 623 and supporting roof 622 and cardboard 625 fixed connection are run through at both ends about gag lever post two 624, through V-arrangement cardboard 623, on the one hand can increase the fixed effect between the supporting roof 622, and on the other hand can support the pressure that supporting roof 622 bore, has improved fixed effect to a certain extent, through gag lever post two 624, can be further carry out spacingly and fixed to supporting roof 622, also can carry out the restriction to a certain extent to V-arrangement cardboard 623 simultaneously.

One specific application of this embodiment is: after the device is squared at a proper position, the supporting block 6 can be jacked to a proper height by using the hydraulic rod 2 according to the height of a user, when the right side of the top of the supporting block 6 is stressed, the fixing plate 63 drives the arc block II 647 to rotate along the outer surface of the cylindrical rod 64, the arc block I646 is influenced by the arc block II 647, the limiting rod I645 and the connecting block I644 drive the connecting rod 643 to move together, the connecting rod 643 can extrude the spring II through the fixing block II 642 during moving, the spring I is stretched under the influence of the movement of the fixing block I61, after writing is finished, the arc plate 12 can be pulled out outwards, the arc plate 12 can rotate along the rotating shaft I11 under stress, and the T-shaped rod 14 also moves towards the inside of the sliding groove under the influence of the arc plate 12, and extrude spring three, can put into the semi-arc groove with the pen and deposit after arc 12 opens completely, then loosen the hand, thereby the T shape pole 14 can resume the arc 12 to the normal position under the influence of spring resilience force after the arc 12 loses pressure support, rubber block 125 can contact with a surface contact of pen this moment, square 124 receives reaction force drive arc three 123 to move to the outside, branch 122 also begins to move to the outside after receiving the influence of arc three 123, push rod 127 promotes fixture block 126 to move to the draw-in groove inside under the influence of branch 122, fixture block 126 can extrude spring four when moving, and then the pressure that kick-backs of accessible spring four makes square 124 and rubber block 125 reach the effect of pressing from both sides the pen.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides an auxiliary writing device, includes base (1), hydraulic stem (2), dead lever (3), guard plate (4), square board (5) and supporting shoe (6), its characterized in that: the hydraulic rod (2) is fixedly connected to the top of the base (1), the fixing rod (3) is arranged on the inner surface of the top end of the hydraulic rod (2), the protection plate (4) is fixedly connected to the left end and the right end of the fixing rod (3), the square plates (5) are fixedly connected to the top of the protection plate (4), and one side, close to each other, of each of the two square plates (5) is provided with a supporting block (6);

the supporting block (6) comprises a first fixing block (61), a concave block (62), a fixing plate (63) and a cylindrical rod (64), the first fixing block (61) is fixedly connected to the upper end of the inner wall of the supporting block (6), the concave block (62) is fixedly connected to the outer surface of the first fixing block (61), the fixing plate (63) is fixedly connected to the left end and the right end of the inner wall of the supporting block (6), the cylindrical rod (64) is arranged at a middle shaft inside the supporting block (6), and the concave block (62) is fixedly connected with the fixing plate (63) through a fourth fixing block;

the cylindrical rod (64) comprises an arc-shaped rod (641), a second fixed block (642), a first connecting rod (643), a first connecting block (644), a first limiting rod (645), a first arc-shaped block (646) and a second arc-shaped block (647), sliding grooves are formed in the left side and the right side of the interior of the cylindrical rod (64), the arc-shaped rod (641) is fixedly connected to the interior of the sliding grooves, an opening is formed in one side, away from each other, of each sliding groove, the second fixed block (642) is slidably connected to the interior of the opening, an annular groove is formed in the interior of the cylindrical rod (64), the connecting rod (643) is arranged on the left side and the right side of the interior of the annular groove, the first connecting block (644) is fixedly connected to the upper end and the lower end of the connecting rod (643), the first limiting rod (645) is fixedly installed at one end, away from the connecting rod (643), the first arc-shaped block (646) is slidably connected to the outer surface of the cylindrical rod (64), and the second arc-shaped block (647) is fixedly connected to one end, away from the second arc-shaped block (646);

the front side and the back side of the cylindrical rod (64) are fixedly connected with a first positioning rod, one end, far away from the cylindrical rod (64), of the first positioning rod is fixedly connected with the square plate (5), the diameter of the first positioning rod is smaller than that of the cylindrical rod (64), a notch is formed in the outer surface of the first arc-shaped block (646), and the front end and the back end of the first limiting rod (645) are fixedly connected with the front end and the back end of the inner wall of the notch;

one end of the second arc-shaped block (647) far away from the cylindrical rod (64) is fixedly connected with the fixing plate (63);

the left end of the second fixed block (642) is connected to the outer surface of the arc-shaped rod (641) in a sliding mode, the right end of the second fixed block (642) is fixedly connected with the connecting rod (643), the upper end and the lower end of the second fixed block (642) are fixedly connected with a first spring and a second spring, the first spring and the second spring are both sleeved on the outer surface of the arc-shaped rod (641), and one ends, far away from the second fixed block (642), of the first spring and the second spring are fixedly connected with the inner wall of the sliding groove;

the inner surface of the second arc-shaped block (647) is in contact with the outer surface of the cylindrical rod (64);

the supporting block (6) comprises a first rotating shaft (11), an arc-shaped plate (12), a second rotating shaft (13) and a T-shaped rod (14) inside, a semicircular groove is formed in the outer surface of the right side of the supporting block (6), the first rotating shaft (11) is rotatably connected to the left side and the right side of the inner wall of the semicircular groove, the arc-shaped plate (12) is fixedly connected to the outer surface of the first rotating shaft (11), an arc-shaped opening is formed in the outer surface of the arc-shaped plate (12), the second rotating shaft (13) is rotatably connected inside the arc-shaped opening, arc-shaped grooves are formed in the left side and the right side of the semicircular groove, and the T-shaped rod (14) is slidably connected inside the arc-shaped opening;

a third spring is fixedly installed at the bottom of the T-shaped rod (14), and the bottom of the third spring is fixedly connected with the bottom of the inner wall of the arc-shaped groove;

the arc-shaped plate (12) comprises an arc-shaped block four (121), a support rod (122), an arc-shaped block three (123), a square block (124), a rubber block (125), clamping blocks (126), a push rod (127) and limiting blocks (128), wherein the arc-shaped block four (121) is fixedly connected to the inner surface of the arc-shaped plate (12), the support rod (122) is arranged on the left side and the right side of the outer surface of the arc-shaped block four (121), the arc-shaped block three (123) is arranged at one end, far away from the arc-shaped block four (121), of the support rod (122), the square block (124) is fixedly arranged on one side, far away from the support rod (122), the rubber block (125) is fixedly connected to the bottom of the square block (124), clamping grooves are formed in the top of the arc-shaped block four (121), the clamping blocks (126) are two in number, the two clamping blocks (126) are slidably connected to the inside of the clamping grooves, the push rod (127) is fixedly connected to one side, far away from the two clamping blocks (126), and the limiting blocks (128) are fixedly connected to one side, far away from the support rod (122);

the push rod (127) is arc-shaped, and one side, away from the clamping block (126), of the push rod (127) penetrates through the limiting block (128) and extends into the support rod (122);

one end, far away from the arc-shaped groove, of the T-shaped rod (14) is fixedly connected to the outer surface of the second rotating shaft (13), the support rod (122) is rotatably connected with the fourth arc-shaped block (121) through the third rotating shaft, and the support rod (122) is rotatably connected with the third arc-shaped block (123) through the fourth rotating shaft;

a spring IV is fixedly arranged on one side, close to each other, of each of the two clamping blocks (126);

the number of the rubber blocks (125) is three, the three rubber blocks (125) are semicircular, the sizes and the shapes of the fixture blocks (126) are the same as those of the inner wall of the clamping groove, and the sides, far away from each other, of the two fixture blocks (126) are respectively contacted with the left side and the right side of the inner wall of the clamping groove;

a receiving and releasing opening is formed in the inner surface of the arc-shaped plate (12), and the size and the shape of the receiving and releasing opening are the same as those of the limiting block (128);

the concave block (62) comprises a second positioning rod (621), two supporting top plates (622), V-shaped clamping plates (623), two limiting rods (624) and clamping plates (625), the second positioning rod (621) is fixedly installed inside a notch of the concave block (62), the supporting top plates (622) are fixedly connected to the outer surfaces of the second positioning rod (621), the number of the supporting top plates (622) is four, the V-shaped clamping plates (623) are fixedly connected to one side, close to each other, of the two supporting top plates (622), the two limiting rods (624) are arranged on the left side and the right side of the second positioning rod (621), and the clamping plates (625) are fixedly connected to one side, far away from each other, of the four supporting top plates (622);

the top end of the supporting top plate (622) positioned at the upper end is fixedly connected with the bottom of the first fixing block (61), and the bottom end of the supporting top plate (622) positioned at the lower end is fixedly connected with the bottom of the inner wall of the notch of the concave block (62);

the upper end and the lower end of the second limiting rod (624) penetrate through the V-shaped clamping plate (623) and the supporting top plate (622) to be fixedly connected with the clamping plate (625).