CN114120765A - English vocabulary kind contrast explanation presentation device - Google Patents

Abstract

The invention discloses an English vocabulary kind contrast explanation demonstration device which comprises a bottom plate, wherein two stand columns are fixedly arranged on the upper surface of the bottom plate, a sliding hole is formed in each of the two stand columns, a magnetic rod body is slidably arranged in each of the two sliding holes, a limiting assembly is arranged between each sliding hole and the corresponding magnetic rod body, and a sealing gasket is fixedly arranged at the lower end part of each magnetic rod body; the upper surface of the bottom plate is fixedly provided with a pressure box through two hard pipelines, and the hard pipelines are communicated with the pressure box. Has the advantages that: the removal of first demonstration board and the fixed operation after the removal are very simple and convenient, great saving time, efficiency when having improved the regulation, simultaneously can be according to the altitude mixture control when required selection one or two first demonstration boards to two users of being convenient for use simultaneously, the better demonstration of contrasting of being convenient for.

Description

English vocabulary kind contrast explanation presentation device

Technical Field

The invention relates to an explanation demonstration device, in particular to an English vocabulary kind contrast explanation demonstration device.

Background

Through the retrieval, chinese of patent number CN214042756U authorizes utility model patent document discloses an english vocabulary kind contrast explanation presentation device, including first diaphragm and second diaphragm, first diaphragm is located the second diaphragm under, first spout has been seted up at the top of first diaphragm, and the second spout has been seted up to the bottom of second diaphragm, is equipped with two first demonstration boards between first diaphragm and the second diaphragm.

The contrast explanation presentation device has the following defects when in use: two first demonstration boards can only carry out the operation of going up and down simultaneously, and the user that satisfies two differences in height that can not be fine contrasts simultaneously and uses.

Disclosure of Invention

The invention aims to solve the problems in the background technology and provides an English vocabulary category contrast explanation demonstration device.

In order to achieve the purpose, the invention adopts the following technical scheme:

the English vocabulary type contrast explanation demonstration device comprises a bottom plate, wherein two stand columns are fixedly arranged on the upper surface of the bottom plate, a sliding hole is formed in each of the two stand columns, a magnetic rod body is slidably arranged in each of the two sliding holes, a limiting assembly is arranged between each sliding hole and the corresponding magnetic rod body, and a sealing gasket is fixedly arranged at the lower end part of each magnetic rod body;

the upper surface of the bottom plate is fixedly provided with a pressure box through two hard pipelines, the hard pipelines are communicated with the pressure box, valves are arranged on the two hard pipelines, a sealing sliding plate is arranged in the pressure box in a sealing and sliding mode, and a moving assembly is arranged between the pressure box and the sealing sliding plate;

the bottom plate is symmetrically provided with a first groove body and a second groove body, the second groove body is matched with the hard pipeline for use, the first groove body is matched with the upright post for use, the first groove body is communicated with the corresponding second groove body, the bottom walls of the first groove bodies are fixedly provided with a first magnetic block, and the magnetism of one side, close to the magnetic rod body, of the first magnetic block is the same as that of one side, close to the magnetic rod body, of the first magnetic block;

two the equal fixed mounting in upper end of the magnetism body of rod has a backup pad body, two a shifting chute has all been seted up on the backup pad body, two the internal equal slidable mounting of backup pad has two supporting slide blocks, corresponding two the common fixed mounting of supporting slide block has a first demonstration board, two equal fixed mounting has a second demonstration board on the backup pad body.

In the device for demonstrating the English vocabulary type contrast explanation, a clamping block is fixedly mounted on one side, far away from each other, of each corresponding support sliding block, and a clamping groove matched with the clamping block is formed in the side wall of each of two ends of each moving groove;

two moving cavities corresponding to the clamping grooves are formed in the two supporting plate bodies, a second magnetic block is slidably mounted in each moving cavity, a pushing assembly is mounted between each supporting plate body and the corresponding second magnetic block, and a first connecting groove body communicated with the moving cavities is formed in the bottom wall of each clamping groove;

each clamping block is provided with a stepped groove, a magnetic block four is slidably mounted in each stepped groove, the lower end of each magnetic block four is fixedly provided with an inserting rod matched with the connecting groove body I, and the magnetism of one side, close to the corresponding magnetic block two phase, of each magnetic block four is opposite to that of one side, close to the corresponding magnetic block two phase, of each magnetic block four;

each clamping block is provided with an upward moving structure matched with the magnetic block IV;

a relative sliding structure is arranged between the two supporting plate bodies;

and a limiting sliding structure is arranged between the supporting sliding block and the corresponding moving groove.

In foretell english vocabulary kind contrast explanation presentation device, spacing subassembly comprises spacing hole, gag lever post, two a spacing hole has all been seted up on the magnetism body of rod, two equal fixed mounting has one and spacing hole matched with gag lever post on the inner wall of sliding hole.

In foretell english vocabulary kind contrast explanation presentation device, the removal subassembly comprises lead screw, ball nut, elastic sealing ring and knob, rotate on the diapire of pressure case and install the lead screw, and install on the sealed slide with lead screw matched with ball nut, the lower fixed surface of sealed slide install with lead screw matched with elastic sealing ring, the upper end of lead screw runs through pressure case and fixed mounting has the knob.

In foretell english vocabulary kind of a class contrast explanation presentation device, two the equal fixed mounting of lower extreme of first demonstration board has a plurality of support frames, and the support frame is located corresponding shifting chute, corresponding two rotate between the support frame and install a gyro wheel, and the diapire contact of gyro wheel and shifting chute.

In foretell english vocabulary kind contrast explanation presentation device, the promotion subassembly is by connecting two cell bodies, connecting the body of rod and promoting the piece and constitute, two all set up two on the outside limit of supporting plate body and remove the connection cell body two that the chamber is linked together with corresponding, every the equal fixed mounting in side of magnetic path two has a connecting rod body, and the one end of connecting the body of rod passes corresponding connection cell body two and fixed mounting has and promotes the piece.

In foretell english vocabulary kind of a class contrast explanation presentation device, it comprises installation cell body and magnetic path three, every to move up the structure all seted up an installation cell body on the roof in ladder groove, every equal fixed mounting has a magnetic path three on the installation cell body, and magnetic path three is opposite with the magnetism that the magnetic path four phases are close to one side, magnetic force between magnetic path three and the magnetic path four is less than the magnetic force between magnetic path two and the magnetic path four.

In foretell english vocabulary kind of a class contrast explanation presentation device, the relative slip structure comprises sliding tray, plate body and sliding block, two the equal fixed mounting of lower extreme of supporting plate body has a plate body, and two plate bodies laminate each other, two a sliding tray has all been seted up on the plate body, and two crisscross settings of sliding tray, two equal fixed mounting has the sliding block with sliding tray matched with on the plate body.

In foretell english vocabulary kind of a class contrast explanation presentation device, spacing sliding structure comprises bar sliding tray and bar gag lever post, two a bar sliding tray, every has all been seted up on the both sides inner wall of shifting chute the equal fixed mounting in both sides of supporting shoe has one and bar sliding tray matched with bar gag lever post.

Compared with the prior art, the invention has the advantages that:

1: the movable second magnet, the movable fourth magnet, the movable third magnet, the inserted rod, the clamping block and the clamping groove are matched for use, so that the first demonstration board is very simple and convenient to move and fix after moving, time is greatly saved, and adjusting efficiency is improved.

2: the height of one or two first demonstration boards can be selected as required and adjusted simultaneously, so that two users can use the demonstration board simultaneously, and comparison and demonstration can be better performed.

Drawings

FIG. 1 is a schematic structural diagram of an English vocabulary category contrast explanation demonstration apparatus according to the present invention;

FIG. 2 is a cross-sectional view of the structure of the portion of the support plate of FIG. 1;

FIG. 3 is an enlarged view of the structure of portion A in FIG. 2;

FIG. 4 is a structural cross-sectional view of the latch of FIG. 2;

fig. 5 is a schematic structural view of the plate body in fig. 1;

fig. 6 is a structural sectional view of the bottom plate portion in fig. 1.

In the figure: 1 bottom plate, 2 columns, 3 sliding holes, 4 limiting holes, 5 limiting rods, 6 first groove bodies, 7 second groove bodies, 8 hard pipelines, 9 pressure boxes, 10 lead screws, 11 sealing sliding plates, 12 knobs, 13 first magnetic blocks, 14 magnetic rod bodies, 15 supporting plate bodies, 16 moving grooves, 17 rollers, 18 first demonstration plates, 19 second demonstration plates, 20 supporting sliding blocks, 21 clamping blocks, 22 clamping grooves, 23 moving cavities, 24 second magnetic blocks, 25 connecting rod bodies, 26 pushing blocks, 27 stepped grooves, 28 third magnetic blocks, 29 fourth magnetic blocks, 30 inserting rods, 31 plate bodies, 32 sliding blocks and 33 sliding grooves.

Detailed Description

Referring to fig. 1 and 6, an english vocabulary kind contrast explanation demonstration device comprises a bottom plate 1, two upright posts 2 are fixedly installed on the upper surface of the bottom plate 1, a sliding hole 3 is respectively formed on the two upright posts 2, a magnetic rod 14 is respectively installed in the two sliding holes 3 in a sliding manner, a limiting component is installed between the sliding hole 3 and the corresponding magnetic rod 14,

the following points are notable:

1. the lower end part of the magnetic rod body 14 is fixedly provided with a sealing gasket, and the sealing gasket is arranged to form a sealed interval between the lower end part of the magnetic rod body 14 and the sliding hole 3 as well as the bottom plate 1, so that the height of the magnetic rod body 14 can be changed conveniently by utilizing the change of air pressure.

2. Spacing subassembly comprises spacing hole 4, gag lever post 5, has all seted up a spacing hole 4 on two magnetic rod bodies 14, all fixed mounting have one with spacing hole 4 matched with gag lever post 5 on the inner wall of two sliding hole 3.

3. The setting of spacing subassembly has carried out certain degree to the ascending and descending height of the magnetic rod body 14 and has prescribed a limit, avoids the magnetic rod body 14 and stand 2 thoroughly to separate, has also ensured the stability when using to a certain extent simultaneously.

Referring to fig. 1 and 6, a pressure tank 9 is fixedly installed on the upper surface of a bottom plate 1 through two hard pipelines 8, the hard pipelines 8 are communicated with the pressure tank 9, a sealing sliding plate 11 is installed in the pressure tank 9 in a sealing and sliding manner, and a moving assembly is installed between the pressure tank 9 and the sealing sliding plate 11;

the following points are notable:

1. the movable assembly comprises a screw rod 10, a ball nut, an elastic sealing ring and a knob 12, the screw rod 10 is rotatably mounted on the bottom wall of the pressure box 9, the ball nut matched with the screw rod 10 is mounted on the sealing sliding plate 11, the elastic sealing ring matched with the screw rod 10 is fixedly mounted on the lower surface of the sealing sliding plate 11, and the knob 12 penetrates through the pressure box 9 and is fixedly mounted at the upper end of the screw rod 10.

2. The purpose of the moving assembly is to apply an upward or downward force to the seal slide 11.

3. Valves are mounted on both rigid pipes 8, so that the device can select one of the magnetic rod bodies 14 to move upwards according to needs.

4. Initially there is more gas in the pressure tank 9 in a compressed state.

Referring to fig. 6, two first groove bodies 6 and two second groove bodies 7 are symmetrically formed in the bottom plate 1, the second groove bodies 7 are matched with the hard pipeline 8 for use, the first groove bodies 6 are matched with the upright posts 2 for use, the first groove bodies 6 are communicated with the corresponding second groove bodies 7, and a first magnetic block 13 is fixedly mounted on the bottom walls of the first groove bodies 6;

the above is noteworthy for the following two points:

1. the magnetism of the first magnetic block 13 and the magnetism of one side, close to the magnetic rod body 14, of the magnetic rod body are the same, so that the magnetic rod body 14 is always supported by one magnetism, and the overall stability is improved.

2. The gas flowing out through the hard pipeline 8 can only flow into the first groove body 6 through the second groove body 7 and then can only flow into the sliding hole 3 through the first groove body 6.

Referring to fig. 1 and 2, a supporting plate body 15 is fixedly mounted at the upper end of each of the two magnetic rod bodies 14, a moving groove 16 is formed in each of the two supporting plate bodies 15, two supporting sliders 20 are slidably mounted in each of the two supporting plate bodies 15, a first demonstration plate 18 is fixedly mounted on each of the two corresponding supporting sliders 20, and a second demonstration plate 19 is fixedly mounted on each of the two supporting plate bodies 15;

the following points are notable:

1. the lower ends of the two first demonstration boards 18 are fixedly provided with a plurality of support frames, the support frames are positioned in the corresponding moving grooves 16, a roller 17 is rotatably arranged between the two corresponding support frames, and the roller 17 is in contact with the bottom wall of the moving groove 16.

2. The arrangement of the roller 17 on the one hand improves the stability of the first demonstration board 18 and on the other hand the roller 17 rolls with the movement of the first demonstration board 18, the increased friction is relatively small.

3. Second demonstration plate 19 is not in contact with first demonstration plate 18 so that movement of first demonstration plate 18 does not cause wear to the surface of second demonstration plate 19.

Referring to fig. 2, a clamping block 21 is fixedly mounted on each of the sides of the two corresponding support sliders 20 away from each other, and a clamping groove 22 matched with the clamping block 21 is formed in each of the side walls of the two ends of each of the two moving grooves 16;

the above is noteworthy: a rubber pad is fixedly arranged on the inner wall of each side of the clamping groove 22 (along the thickness direction of the second demonstration board 19), and the elasticity of the rubber pad is utilized to increase the stability of the clamping.

Referring to fig. 2 and 3, two moving cavities 23 corresponding to the clamping grooves 22 are formed in the two supporting plate bodies 15, a second magnetic block 24 is slidably mounted in each moving cavity 23, a pushing assembly is mounted between each supporting plate body 15 and the corresponding second magnetic block 24, and a first connecting groove body communicated with the moving cavity 23 is formed in the bottom wall of each clamping groove 22;

the above is noteworthy for the following two points:

1. the pushing assembly is composed of a second connecting groove body, a second connecting rod body 25 and a pushing block 26, the second connecting groove body communicated with the corresponding moving cavity 23 is formed in the outer side edges of the two supporting plate bodies 15, the connecting rod body 25 is fixedly mounted on the side edge of each of the two magnetic blocks 24, and the pushing block 26 is fixedly mounted on one end of the connecting rod body 25 penetrating through the corresponding second connecting groove body.

2. The pushing assembly is arranged to apply a moving force to the second magnetic block 24 by hand when needed, so that the use is convenient.

Referring to fig. 4, each fixture block 21 is provided with a stepped groove 27, a magnetic block four 29 is slidably mounted in each stepped groove 27, the lower end of each magnetic block four 29 is fixedly provided with an insertion rod 30 matched with the connecting groove body one, the magnetism of the side, close to the corresponding magnetic block two 24, of each magnetic block four 29 is opposite, and each fixture block 21 is provided with an upward moving structure matched with the magnetic block four 29;

the following points are notable:

1. the upward moving structure comprises an installation groove body and a third magnetic block 28, the top wall of each stepped groove 27 is provided with the installation groove body, each installation groove body is fixedly provided with the third magnetic block 28, and the magnetism of one side, close to each of the third magnetic block 28 and the fourth magnetic block 29, of each magnetic block is opposite.

2. The upward moving structure is arranged to move the second magnetic block 24 (not corresponding to the fourth magnetic block 29), and then the second magnetic block 29 moves upward under the action of the third magnetic block 28, and the fourth magnetic block 29 moves upward to drive the insertion rod 30 fixedly connected with the fourth magnetic block to completely move back into the corresponding fixture block 21.

3. The magnetic force between the magnetic block three 28 and the magnetic block four 29 is smaller than the magnetic force between the magnetic block two 24 and the magnetic block four 29, so that when the magnetic block two 24, the magnetic block three 28 and the magnetic block four 29 are positioned in a vertical line, the magnetic block four 29 moves downwards, the inserting rod 30 moves downwards to be clamped in the connecting groove body, and the clamping block 21 cannot move in the horizontal direction.

Referring to fig. 5, a relative sliding structure is installed between the two supporting plate bodies 15, and a limit sliding structure is installed between the supporting slider 20 and the corresponding moving groove 16;

the above is noteworthy for the following two points:

1. relative sliding structure comprises sliding tray 33, plate body 31 and sliding block 32, and the equal fixed mounting of lower extreme of two backup pad bodies 15 has a plate body 31, and two plate bodies 31 laminate each other, has all seted up a sliding tray 33 on two plate bodies 31, and two sliding tray 33 crisscross settings, equal fixed mounting have with sliding tray 33 matched with sliding block 32 on two plate bodies 31.

2. The arrangement of the relative sliding structure enables the two supporting plate bodies 15 to be supported by a blocking in the horizontal direction when the pair of supporting plate bodies move first, so that the stability of the supporting plate bodies when the supporting plate bodies move upwards is improved.

3. The limiting sliding structure is composed of a bar-shaped sliding groove (not shown in the figure) and a bar-shaped limiting rod (not shown in the figure), the inner walls of the two sides of the two moving grooves 16 are provided with the bar-shaped sliding groove, and the two sides of each supporting slide block 20 are fixedly provided with the bar-shaped limiting rod matched with the bar-shaped sliding groove.

4. The limiting slide structure is arranged so that the supporting slide 20 does not move upwards from the corresponding moving groove 16, so that the first demonstration board 18 does not vertically separate from the supporting board body 15.

5. The thickness of the supporting plate body 15 is greater than the width of the moving slot 16, and the lower surface of the first demonstration board 18 is attached to the upper surface of the supporting plate body 15.

Further, unless otherwise specifically stated or limited, the above-described fixed connection is to be understood in a broad sense, and may be, for example, welded, glued, or integrally formed as is conventional in the art.

In the invention, when two supporting plate bodies 15 need to move upwards at the same time, two valves are in an open state, a rotating force is applied to the knob 12 by hand, the knob 12 rotates to drive the sealing sliding plate 11 to move downwards through the screw rod 10, so that the gas in the pressure box 9 is pressed downwards, the gas enters between the two sliding holes 3 through the hard pipeline 8, the groove body two 7 and the groove body one 6, the gas pressure in the sliding holes 3 is increased, and finally the magnetic rod body 14 moves upwards.

When only one support plate 15 is required to move upwards, the corresponding valve is in an open state, the other valve is in a closed state, and then the knob 12 is rotated to realize the upward movement of the single support plate 15.

When first demonstration board 18 needs to be moved so that second demonstration board 19 is in the unoccluded use state, apply a moving force to pushing block 26 under corresponding first demonstration board 18 with a hand, pushing block 26 moves to drive second magnetic block 24 fixedly connected with it through connecting rod body 25 to move, thereby make inserted bar 30 retract into corresponding fixture block 21, then apply a moving force to first demonstration board 18, when fixture block 21 block is to the draw-in groove 22 on the direction of moving one side, make inserted bar 30 move down again under the effect of second magnetic block 24 in this position and block in this corresponding connecting groove body one, thereby realize automatic fixation.

Claims (9)

1. The English vocabulary kind contrast explanation presentation device comprises a bottom plate (1) and is characterized in that two stand columns (2) are fixedly mounted on the upper surface of the bottom plate (1), each of the two stand columns (2) is provided with a sliding hole (3), a magnetic rod body (14) is slidably mounted in each of the two sliding holes (3), a limiting component is mounted between each sliding hole (3) and the corresponding magnetic rod body (14), and a sealing gasket is fixedly mounted at the lower end part of each magnetic rod body (14);

the upper surface of the bottom plate (1) is fixedly provided with a pressure box (9) through two hard pipelines (8), the hard pipelines (8) are communicated with the pressure box (9), valves are arranged on the two hard pipelines (8), a sealing sliding plate (11) is arranged in the pressure box (9) in a sealing and sliding manner, and a moving assembly is arranged between the pressure box (9) and the sealing sliding plate (11);

the bottom plate (1) is symmetrically provided with two first groove bodies (6) and two second groove bodies (7), the second groove bodies (7) are matched with the hard pipeline (8) for use, the first groove bodies (6) are matched with the upright posts (2) for use, the first groove bodies (6) are communicated with the corresponding second groove bodies (7), the bottom walls of the two first groove bodies (6) are fixedly provided with a first magnetic block (13), and the magnetism of one side, close to the magnetic rod body (14), of the first magnetic block (13) is the same as that of one side, close to the magnetic rod body (14);

two the equal fixed mounting in upper end of the magnetic rod body (14) has a supporting plate body (15), two a shifting chute (16), two have all been seted up on the supporting plate body (15) equal slidable mounting has two supporting slider (20), corresponding two in the supporting plate body (15) the common fixed mounting of supporting slider (20) has a first demonstration board (18), two equal fixed mounting has a second demonstration board (19) on the supporting plate body (15).

2. The English vocabulary kind contrast explanation presentation device of claim 1, characterized in that a clamping block (21) is fixedly installed on the side of each of the two corresponding supporting sliding blocks (20) away from each other, and a clamping groove (22) matched with the clamping block (21) is formed on the side wall of each of the two ends of each of the two moving grooves (16);

two moving cavities (23) corresponding to the clamping grooves (22) are formed in the two supporting plate bodies (15), a second magnetic block (24) is slidably mounted in each moving cavity (23), a pushing assembly is mounted between each supporting plate body (15) and the corresponding second magnetic block (24), and a first connecting groove body communicated with the moving cavities (23) is formed in the bottom wall of each clamping groove (22);

each clamping block (21) is provided with a stepped groove (27), a magnetic block four (29) is slidably mounted in each stepped groove (27), the lower end of each magnetic block four (29) is fixedly provided with an inserting rod (30) matched with the connecting groove body I, and the magnetism of one side, close to the corresponding magnetic block two (24), of each magnetic block four (29) is opposite;

each fixture block (21) is provided with an upward moving structure matched with the four magnetic blocks (29);

a relative sliding structure is arranged between the two supporting plate bodies (15);

and a limiting sliding structure is arranged between the supporting sliding block (20) and the corresponding moving groove (16).

3. The English vocabulary kind contrast explanation presentation device of claim 1, characterized in that, spacing subassembly comprises spacing hole (4), gag lever post (5), has seted up a spacing hole (4) on two magnetism body of rod (14), and two be fixed mounting has one gag lever post (5) with spacing hole (4) matched with on the inner wall of sliding hole (3).

4. The English vocabulary kind contrast explanation presentation device of claim 2, characterized in that, the removal subassembly comprises lead screw (10), ball nut, elastic sealing ring and knob (12), rotate on the bottom wall of pressure case (9) and install lead screw (10), and install the ball nut with lead screw (10) matched with on the sealed slide (11), the lower fixed surface of sealed slide (11) installs the elastic sealing ring with lead screw (10) matched with, the upper end of lead screw (10) runs through pressure case (9) and fixed mounting has knob (12).

5. The English vocabulary kind contrast explanation presentation device of claim 2, characterized in that, two the lower extreme of first demonstration board (18) is equal fixed mounting has a plurality of support frames, and the support frame is located corresponding shifting chute (16), corresponding two rotate between the support frame and install a gyro wheel (17), and gyro wheel (17) and the diapire contact of shifting chute (16).

6. The English vocabulary kind contrast explanation presentation device of claim 2, characterized in that, the promotion subassembly comprises connection groove body two, the connection body of rod (25) and promotion piece (26), two all seted up two connection groove body two that are linked together with corresponding removal chamber (23) on the outside limit of supporting plate body (15), every the equal fixed mounting in side of the two (24) of magnetic path has a connection body of rod (25), and the one end of the connection body of rod (25) passes corresponding connection groove body two and fixed mounting has and promotes piece (26).

7. The English vocabulary kind contrast explanation presentation device of claim 6, characterized in that, it comprises installation cell body and magnetic block three (28) to move up the structure, every an installation cell body has all been seted up on the roof of ladder groove (27), every equal fixed mounting has a magnetic block three (28) on the installation cell body, and magnetic block three (28) and magnetic block four (29) are close to the magnetism of one side opposite mutually, magnetic force between magnetic block three (28) and magnetic block four (29) is less than the magnetic force between magnetic block two (24) and magnetic block four (29).

8. The English vocabulary kind contrast explanation presentation device of claim 7, characterized in that, relative sliding structure comprises sliding tray (33), plate body (31) and sliding block (32), two the equal fixed mounting of lower extreme of supporting plate body (15) has a plate body (31), and two plate bodies (31) laminate each other, two a sliding tray (33) has all been seted up on plate body (31), and two sliding tray (33) crisscross setting, two equal fixed mounting has sliding block (32) with sliding tray (33) matched with on plate body (31).

9. The English vocabulary kind contrast explanation presentation device of claim 2, characterized in that, spacing sliding structure comprises bar-shaped sliding tray and bar-shaped gag lever post, and two a bar-shaped sliding tray has all been seted up on the both sides inner wall of shifting chute (16), and the both sides of every supporting slide (20) are all fixed mounting have one with bar-shaped sliding tray matched with bar-shaped gag lever post.

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