阅读说明：本技术 一种英语教学用听力训练设备 (Listening training equipment is used in english teaching ) 是由 徐红 卢阳 于闽青 于 2021-03-30 设计创作，主要内容包括：本发明提供一种英语教学用听力训练设备,属于教学工具技术领域,该英语教学用听力训练设备,包括底板,底板的下侧设有转向机构,底板的上侧从下至上依次设有高度调节机构和音响机构,转向机构包括导向杆、第二电机、第一空槽、导向块、第四固定杆、两个第一固定杆、两个限位块、两个第二固定杆、两个固定盘、两个转向轮和四个第三固定杆,两个第一固定杆均固定连接于底板的下端,两个限位块分别固定连接于两个第一固定杆的下端,两个第二固定杆分别转动连接于两个第一固定杆的圆周表面,位于左端的两个第三固定杆均固定连接于位于左端的第二固定杆的圆周表面；旨在解决现有技术中的固定在角落的设备无法保障整个教室可以听到听力的问题。(The invention provides hearing training equipment for English teaching, which belongs to the technical field of teaching tools and comprises a bottom plate, wherein the lower side of the bottom plate is provided with a steering mechanism, the upper side of the bottom plate is sequentially provided with a height adjusting mechanism and a sound mechanism from bottom to top, the steering mechanism comprises a guide rod, a second motor, a first empty groove, a guide block and a fourth fixing rod, the two first fixing rods are fixedly connected to the lower end of the bottom plate, the two limiting blocks are fixedly connected to the lower ends of the two first fixing rods respectively, the two second fixing rods are rotatably connected to the circumferential surfaces of the two first fixing rods respectively, and the two third fixing rods positioned at the left end are fixedly connected to the circumferential surfaces of the second fixing rods positioned at the left end; the problem that hearing can not be heard in the whole classroom of the equipment that aims at solving fixing in the corner among the prior art can't ensure.)

1. The utility model provides a hearing training equipment is used in english teaching which characterized in that: including bottom plate (1), the downside of bottom plate (1) is equipped with steering mechanism, supreme height adjustment mechanism and the stereo set mechanism of being equipped with in proper order are followed to the upside of bottom plate (1) from down, steering mechanism includes guide bar (506), second motor (507), first dead slot (508), guide block (509), fourth dead lever (510), two first dead levers (5), two stopper (501), two second dead lever (502), two fixed disks (504), two directive wheel (505) and four third dead lever (503), two equal fixed connection in the lower extreme of bottom plate (1) of first dead lever (5), two stopper (501) are fixed connection respectively in the lower extreme of two first dead lever (5), two second dead lever (502) rotate respectively and connect in the circumference surface of two first dead levers (5), are located two of left end equal fixed connection in the second dead lever (503) that are located the left end (two) of third dead lever (503) 502) The two third fixing rods (503) at the right end are fixedly connected to the circumferential surface of the second fixing rod (502) at the right end, the two fixing disks (504) are respectively and fixedly connected to the lower ends of the two third fixing rods (503) at the left end and the lower ends of the two third fixing rods (503) at the right end, the two steering wheels (505) are respectively and fixedly connected to the far ends of the two fixing disks (504), the first empty groove (508) is cut at the front end of the bottom plate (1), the second motor (507) is fixedly connected to the upper end of the bottom plate (1), the guide block (509) is fixedly connected to the lower end of the output shaft of the second motor (507), the fourth fixing rod (510) is fixedly connected to the lower end of the guide block (509), and the guide rod (506) is fixedly connected to the circumferential surfaces of the two third fixing rods (503) at the front end, the fourth fixing lever (510) is rotatably coupled to the circumferential surface of the guide lever (506).

2. A hearing training device for english teaching according to claim 1, wherein: the height adjusting mechanism comprises a first square pipe (6), a second hollow groove (601), a second square pipe (602), a rack (603), a third hollow groove (604), a first fixing frame (605), a rotating rod (606), a circular gear (607) and an annular handle (608), wherein the first square pipe (6) is fixedly connected to the upper end of the bottom plate (1), the second hollow groove (601) is drilled at the upper end of the first square pipe (6), the second square pipe (602) is slidably connected to the inner wall of the second hollow groove (601), the rack (603) is fixedly connected to the right end of the second square pipe (602), the third hollow groove (604) is drilled at the right end of the first square pipe (6), the first fixing frame (605) is fixedly connected to the right end of the first square pipe (6), the rotating rod (606) is rotatably connected to the front and back inner walls of the first fixing frame (605) and extends backwards, the circular gear (607) is fixedly connected to the circumferential surface of the rotating rod (606), the rack (603) is meshed with the circular gear (607), and the annular handle (608) is fixedly connected to the rear end of the rotating rod (606).

3. A hearing training device for english teaching according to claim 2, wherein: the sound mechanism comprises a sound box (7), a third motor (701), a first bevel gear (702), four sounds (703), four second bevel gears (704) and four fourth empty grooves (706), the sound box (7) is fixedly connected with the upper end of the second square pipe (602), the third motor (701) is fixedly connected with the lower inner wall of the sound box (7), first conical gear (702) fixed connection is in the upper end of third motor (701), four fourth dead slot (706) are dug respectively in the four walls of stereo set box (7), four stereo set (703) rotate respectively and are connected in the circumference inner wall of four fourth dead slot (706), four second conical gear (704) fixed connection is close to respectively in four stereo set (703), four second conical gear (704) all are connected with first conical gear (702) meshing.

4. A hearing training device for english teaching according to claim 3, wherein: the rear end of the first square pipe (6) is provided with a threaded hole (901), and the circumferential inner wall of the threaded hole (901) is connected with a bolt (9) in a threaded mode.

5. A hearing training device for English teaching according to claim 4, wherein: the peripheral surfaces of the four sound boxes (703) are fixedly connected with two limiting discs (705) respectively, and the two limiting discs (705) are arranged outside the sound box (7) and inside the sound box (7) respectively.

6. A hearing training device for English teaching according to claim 5, wherein: the lower extreme fixedly connected with battery frame (2) of bottom plate (1), both ends are fixedly connected with first motor (4) respectively about the lower extreme of battery frame (2), two the equal fixedly connected with drive wheel (3) of output shaft of first motor (4).

7. A hearing training device for english teaching according to claim 6, wherein: the upper end of the bottom plate (1) is fixedly connected with a pushing handle (11), and the circumferential surface of the pushing handle (11) is chamfered.

8. A hearing training device for english teaching according to claim 7, wherein: the upper end fixedly connected with second fixed frame (8) of bottom plate (1), the fixed frame of second (8) set up in the upside of second motor (507).

9. A hearing training device for english teaching according to claim 8, wherein: the utility model discloses a stabilizer bar, including bottom plate (1) and the equal fixedly connected with stabilizer bar (10) in upper end of the fixed frame of second (8), two the upper end of stabilizer bar (10) is fixed connection respectively in the front end and the left end of first side's pipe (6).

10. A hearing training device for english teaching according to claim 9, wherein: the lower end of the bottom plate (1) is fixedly connected with a fifth fixing rod (12), and the circumferential surface of the fifth fixing rod (12) is fixedly connected with an induction head (13).

Technical Field

The invention belongs to the technical field of teaching tools, and particularly relates to hearing training equipment for English teaching.

Background

At present, hearing training equipment in a teacher is generally fixed at a corner and limited by the sound of a sound, and a student who sits far away from the sound often cannot hear the hearing content of the sound, so that the hearing training teaching equipment continues to be movable, and the student walks around in a classroom when playing the hearing according to the practical situation of the classroom, so that the student who looks after all directions can hear the hearing, and therefore, the problem that the equipment fixed at the corner cannot ensure that the whole classroom can hear the hearing exists.

Disclosure of Invention

The invention aims to provide hearing training equipment for English teaching, and aims to solve the problem that the equipment fixed at corners in the prior art cannot guarantee that hearing can be heard in the whole classroom.

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

a hearing training device for English teaching comprises a bottom plate, wherein a steering mechanism is arranged on the lower side of the bottom plate, a height adjusting mechanism and a sound mechanism are sequentially arranged on the upper side of the bottom plate from bottom to top, the steering mechanism comprises a guide rod, a second motor, a first empty groove, a guide block, a fourth fixing rod, two first fixing rods, two limiting blocks, two second fixing rods, two fixing disks, two steering wheels and four third fixing rods, the two first fixing rods are fixedly connected to the lower end of the bottom plate, the two limiting blocks are respectively and fixedly connected to the lower ends of the two first fixing rods, the two second fixing rods are respectively and rotatably connected to the circumferential surfaces of the two first fixing rods, the two third fixing rods at the left end are respectively and fixedly connected to the circumferential surface of the second fixing rod at the left end, the two third fixing rods at the right end are respectively and fixedly connected to the circumferential surface of the second fixing rod at the right end, two fixed disk difference fixed connection is in the lower extreme of two third dead levers that are located the left end and the lower extreme that is located two third dead levers of right-hand member, two directive wheel difference fixed connection is in two fixed disk keep away from the end mutually, first dead slot is dug in the front end of bottom plate, second motor fixed connection is in the upper end of bottom plate, guide block fixed connection is in the lower extreme of the output shaft of second motor, fourth dead lever fixed connection is in the lower extreme of guide block, guide bar fixed connection is in the circumferential surface of two third dead levers that are located the front end, the fourth dead lever rotates and connects in the circumferential surface of guide bar.

As a preferred aspect of the present invention, the height adjustment mechanism includes a first square tube, a second empty slot, a second square tube, a rack, a third empty slot, a first fixed frame, a rotating rod, a circular gear, and an annular handle, the first square tube is fixedly connected to the upper end of the bottom plate, the second empty slot is cut in the upper end of the first square tube, the second square tube is slidably connected to the inner wall of the second empty slot, the rack is fixedly connected to the right end of the second square tube, the third empty slot is cut in the right end of the first square tube, the first fixed frame is fixedly connected to the right end of the first square tube, the rotating rod is rotatably connected to the front and rear inner walls of the first fixed frame and extends rearward, the circular gear is fixedly connected to the circumferential surface of the rotating rod, the rack is engaged with the circular gear, and the annular handle is fixedly connected to the rear end of the rotating rod.

As a preferable scheme of the present invention, the sound mechanism includes a sound box, a third motor, a first bevel gear, four sounds, four second bevel gears, and four fourth empty slots, the sound box is fixedly connected to the upper end of the second square tube, the third motor is fixedly connected to the lower inner wall of the sound box, the first bevel gear is fixedly connected to the upper end of the third motor, the four fourth empty slots are respectively drilled in the four walls of the sound box, the four sounds are respectively rotatably connected to the circumferential inner walls of the four fourth empty slots, the four second bevel gears are respectively fixedly connected to the near ends of the four sounds, and the four second bevel gears are all engaged with the first bevel gear.

As a preferable scheme of the present invention, a threaded hole is bored at a rear end of the first square pipe, and a bolt is threadedly connected to a circumferential inner wall of the threaded hole.

As a preferable mode of the present invention, two limiting discs are fixedly connected to circumferential surfaces of the four speakers, respectively, and the two limiting discs are disposed outside the speaker box and inside the speaker box, respectively.

As a preferable aspect of the present invention, a battery rack is fixedly connected to a lower end of the bottom plate, first motors are respectively and fixedly connected to left and right ends of the lower end of the battery rack, and output shafts of the two first motors are fixedly connected to driving wheels.

As a preferable scheme of the invention, the upper end of the bottom plate is fixedly connected with a push handle, and the circumferential surfaces of the push handle are chamfered.

As a preferable aspect of the present invention, a second fixing frame is fixedly connected to an upper end of the base plate, and the second fixing frame is disposed above the second motor.

As a preferable aspect of the present invention, the bottom plate and the upper end of the second fixed frame are both fixedly connected with stabilizer bars, and the upper ends of the two stabilizer bars are respectively and fixedly connected to the front end and the left end of the first square tube.

As a preferable scheme of the present invention, a fifth fixing rod is fixedly connected to a lower end of the bottom plate, and an inductive head is fixedly connected to a circumferential surface of the fifth fixing rod.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention drives the guide block to rotate by starting the second motor through the arranged steering mechanism, the lower end of the guide block is fixedly connected with the fourth fixed rod, the lower end of the fourth fixed rod is rotatably connected with the fourth fixed rod, so that the guide block is limited in displacement angle, thereby the fourth fixed rod can swing left and right to drive the two third fixed rods positioned at the front end to swing, the upper ends of the two third fixed rods positioned at the front end are both rotatably connected with the second fixed rods, the two second fixed rods are respectively rotatably connected with the circumferential surfaces of the two limit blocks, therefore, the two second fixing rods limit the displacement angle, when the two second fixing rods rotate along with the guide rod, the two steering wheels fixedly connected with the lower ends of the two second fixing rods can perform a steering function, so that the purpose of steering the steering mechanism is achieved.

2. According to the invention, through the arranged height adjusting mechanism, the annular handle is rotated to drive the circular gear to rotate, the circular gear is meshed with the rack to be connected, so that the rack can be driven to move up and down, the left end of the rack is fixedly connected with the second square pipe, and the second square pipe slides on the inner wall of the second empty groove, so that the second square pipe can slide up and down, the height adjusting function is completed, and the sound box arranged at the upper end of the second square pipe can adjust the height up and down.

3. According to the four-side sound box, the third motor is started through the arranged sound box mechanism, the output shaft of the third motor is fixedly connected with the first bevel gear, and the first bevel gear is meshed with the four second bevel gears, so that the four sound boxes can move circularly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a first exploded schematic view of the present invention;

FIG. 2 is a second exploded view of the present invention;

FIG. 3 is a front perspective view of the present invention;

FIG. 4 is a side perspective view of the present invention;

FIG. 5 is a front view of the steering mechanism of the present invention;

FIG. 6 is a side view of the steering mechanism of the present invention;

FIG. 7 is a schematic cross-sectional view of a height adjustment mechanism of the present invention;

FIG. 8 is a first cross-sectional view of an acoustic mechanism of the present invention;

fig. 9 is a second cross-sectional view of the acoustic mechanism of the present invention.

In the figure: 1. a base plate; 2. a battery holder; 3. a drive wheel; 4. a first motor; 5. a first fixing lever; 501. A limiting block; 502. a second fixing bar; 503. a third fixing bar; 504. fixing the disc; 505. a steering wheel; 506. a guide bar; 507. a second motor; 508. a first empty slot; 509. a guide block; 510. a fourth fixing bar; 6. a first square tube; 601. a second empty slot; 602. a second square tube; 603. a rack; 604. A third empty slot; 605. a first fixed frame; 606. a rotating rod; 607. a circular gear; 608. an annular handle; 7. a sound box; 701. a third motor; 702. a first bevel gear; 703. sounding; 704. a second bevel gear; 705. a confinement plate; 706. a fourth empty slot; 8. a second fixed frame; 9. a bolt; 901. A threaded hole; 10. a stabilizer bar; 11. a pushing handle; 12. a fifth fixing bar; 13. an inductive head.

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.

Example 1

Referring to fig. 1-9, the present invention provides the following technical solutions:

the utility model provides a hearing training equipment is used in english teaching, comprising a base plate 1, the downside of bottom plate 1 is equipped with steering mechanism, supreme height adjustment mechanism and the stereo set mechanism of being equipped with in proper order are down followed to the upside of bottom plate 1, steering mechanism includes guide bar 506, second motor 507, first dead slot 508, guide block 509, fourth dead lever 510, two first dead lever 5, two stoppers 501, two second dead lever 502, two fixed disks 504, two directive wheel 505 and four third dead lever 503, two equal fixed connection in the lower extreme of bottom plate 1 of first dead lever 5, two stoppers 501 fixed connection respectively in the lower extreme of two first dead lever 5, two second dead levers 502 rotate respectively and connect in the circumferential surface of two first dead lever 5, the equal fixed connection in the circumferential surface of the second dead lever 502 that is located the left end of two third dead levers 503 that are located the left end, the equal fixed connection in the circumferential surface of the second dead lever 502 that is located the right-hand member of two third dead levers 503 that are located the right-hand member Two fixed disks 504 are respectively and fixedly connected to the lower ends of two third fixed rods 503 positioned at the left end and the lower ends of two third fixed rods 503 positioned at the right end, two steering wheels 505 are respectively and fixedly connected to the far ends of the two fixed disks 504, a first empty groove 508 is cut at the front end of the bottom plate 1, a second motor 507 is fixedly connected to the upper end of the bottom plate 1, a guide block 509 is fixedly connected to the lower end of an output shaft of the second motor 507, a fourth fixed rod 510 is fixedly connected to the lower end of the guide block 509, a guide rod 506 is fixedly connected to the circumferential surfaces of the two third fixed rods 503 positioned at the front end, and the fourth fixed rod 510 is rotatably connected to the circumferential surfaces of the guide rod 506.

In the embodiment of the present invention, when the second motor 507 is started, the output shaft of the second motor 507 drives the guide block 509 to rotate, the lower end of the guide block 509 is fixedly connected with the fourth fixing rod 510, the lower end of the fourth fixing rod 510 is rotatably connected with the fourth fixing rod 510, so that the guide block 509 limits the displacement angle, and the fourth fixing rod 510 can swing left and right to drive the two third fixing rods 503 located at the front end to swing, the upper ends of the two third fixing rods 503 located at the front end are both rotatably connected with the second fixing rod 502, the two second fixing rods 502 are respectively rotatably connected to the circumferential surfaces of the two limiting blocks 501, so that the two second fixing rods 502 limit the displacement angle, and when the two second fixing rods 502 rotate along with the guide rod 506, the two steering wheels 505 fixedly connected to the lower ends of the two second fixing rods 502 can perform a steering function, the second motor 507 may be selected to have different models according to actual requirements, for example, the model is YY5034, and the second motor 507 is electrically connected to an external power supply, for those skilled in the art, the second motor 507 is a prior art and will not be described herein in detail.

Specifically referring to fig. 1 and 7, the height adjusting mechanism includes a first square tube 6, a second empty slot 601, a second square tube 602, and a rack 603, the first square pipe 6 is fixedly connected to the upper end of the bottom plate 1, the second hollow groove 601 is cut at the upper end of the first square pipe 6, the second square pipe 602 is slidably connected to the inner wall of the second hollow groove 601, the rack 603 is fixedly connected to the right end of the second square pipe 602, the third hollow groove 604 is cut at the right end of the first square pipe 6, the first fixed frame 605 is fixedly connected to the right end of the first square pipe 6, the rotating rod 606 is rotatably connected to the front and rear inner walls of the first fixed frame 605 and extends backwards, the circular gear 607 is fixedly connected to the circumferential surface of the rotating rod 606, the rack 603 is meshed with the circular gear 607, and the annular handle 608 is fixedly connected to the rear end of the rotating rod 606.

In this embodiment: through rotating annular handle 608, annular handle 608 drives the rotation of circular gear 607, and circular gear 607 is connected with the meshing of rack 603, consequently can drive reciprocating of rack 603, and the left end fixedly connected with second side's pipe 602 of rack 603, second side's pipe 602 slides at second dead slot 601 inner wall, therefore second side's pipe 602 all can slide from top to bottom to accomplish the height control function, make the stereo set 7 that sets up in second side's pipe 602 upper end height-adjusting from top to bottom.

Specifically referring to fig. 1 and 8, the sound mechanism includes a sound box 7, a third motor 701, a first bevel gear 702, four sounds 703, four second bevel gears 704, and four fourth hollow grooves 706, the sound box 7 is fixedly connected to the upper end of the second square pipe 602, the third motor 701 is fixedly connected to the lower inner wall of the sound box 7, the first bevel gear 702 is fixedly connected to the upper end of the third motor 701, the four fourth hollow grooves 706 are respectively drilled in the four walls of the sound box 7, the four sounds 703 are respectively rotatably connected to the circumferential inner walls of the four fourth hollow grooves 706, the four second bevel gears 704 are respectively fixedly connected to the adjacent ends of the four sounds 703, and the four second bevel gears 704 are all in meshed connection with the first bevel gear 702.

In this embodiment: starting the third motor 701, the output shaft of the third motor 701 is fixedly connected with a first bevel gear 702, the first bevel gear 702 is engaged with four second bevel gears 704, so that the four speakers 703 can make circular motion, because the four speakers 703 are all rotationally connected to four walls of the speaker box 7, the four speakers 703 cannot be separated from the speaker box 7 when rotating, so that the four speakers 703 can circularly rotate in four spaces, so that the playing range is wider, the third motor 701 can select different models according to actual requirements, for example, the model is YY5034, the third motor 701 is electrically connected with an external power supply, for those skilled in the art, the third motor 701 is the prior art, and no redundant description is given here.

Specifically referring to fig. 1 and 2, a threaded hole 901 is drilled in the rear end of the first square pipe 6, and a bolt 9 is connected to the circumferential inner wall of the threaded hole 901 in a threaded manner.

In this embodiment: the bolt 9 is screwed into the circumferential inner wall of the screw hole 901, and finally the bolt 9 can be screwed to the front end of the second square pipe 602 to fix the second square pipe 602.

Specifically referring to fig. 8 and 9, two limiting discs 705 are fixedly connected to the circumferential surfaces of the four speakers 703, respectively, and the two limiting discs 705 are disposed outside the speaker box 7 and inside the speaker box 7, respectively.

In this embodiment: the provision of the plurality of restricting disks 705 allows the four sound boxes 703 to rotate more stably, so that the four second bevel gears 704 do not come out of the range of the first bevel gear 702.

Referring to fig. 1 and 2, a battery frame 2 is fixedly connected to the lower end of a bottom plate 1, first motors 4 are respectively and fixedly connected to the left end and the right end of the lower end of the battery frame 2, and driving wheels 3 are fixedly connected to output shafts of the two first motors 4.

In this embodiment: the battery frame 2 supplies power to the two first motors 4, and the two first motors 4 synchronously operate to ensure that the two driving wheels 3 do linear motion.

Specifically, referring to fig. 1, a pushing handle 11 is fixedly connected to the upper end of the bottom plate 1, and the circumferential surface of the pushing handle 11 is chamfered.

In this embodiment: the arrangement of the push handle 11 is convenient for a teacher to drag the invention, the surface of the push handle 11 is chamfered, and the hand is cut.

Specifically, referring to fig. 1 and 5, a second fixing frame 8 is fixedly connected to the upper end of the bottom plate 1, and the second fixing frame 8 is disposed on the upper side of the second motor 507.

In this embodiment: the provision of the second fixing frame 8 prevents dust from falling to the second motor 507.

Specifically, referring to fig. 1, the bottom plate 1 and the upper end of the second fixing frame 8 are both fixedly connected with stabilizer bars 10, and the upper ends of the two stabilizer bars 10 are respectively and fixedly connected to the front end and the left end of the first square tube 6.

In this embodiment: the provision of two stabilizer bars 10 makes the first tube 6 more stable.

Specifically, referring to fig. 1 and 6, a fifth fixing rod 12 is fixedly connected to a lower end of the bottom plate 1, and an inductive head 13 is fixedly connected to a circumferential surface of the fifth fixing rod 12.

In this embodiment: the sensor head 13 is arranged to detect obstacles ahead and generate signals to the sensor of the second motor 507, so that the second motor 507 can change its path in time.

The working principle and the using process of the invention are as follows: by starting the second motor 507, the output shaft of the second motor 507 drives the guide block 509 to rotate, the lower end of the guide block 509 is fixedly connected with a fourth fixing rod 510, the lower end of the fourth fixing rod 510 is rotatably connected with the fourth fixing rod 510, so that the guide block 509 limits the displacement angle, and the fourth fixing rod 510 can swing left and right to drive two third fixing rods 503 at the front end to swing, the upper ends of the two third fixing rods 503 at the front end are both rotatably connected with the second fixing rod 502, the two second fixing rods 502 are respectively rotatably connected to the circumferential surfaces of the two limit blocks 501, so that the two second fixing rods 502 limit the displacement angle, when the two second fixing rods 502 rotate along with the guide rod 506, the two steering wheels 505 fixedly connected to the lower ends of the two second fixing rods 502 can perform a steering function, the annular handle 608 is rotated to drive the circular gear 607 to rotate, circular gear 607 is connected with the meshing of rack 603, consequently, can drive reciprocating of rack 603, the left end fixedly connected with second side pipe 602 of rack 603, second side pipe 602 slides at second dead slot 601 inner wall, consequently, second side pipe 602 all can slide from top to bottom, thereby accomplish the height-adjusting function, make the stereo set mechanism who sets up in second side pipe 602 upper end adjust the height from top to bottom, start third motor 701, the output shaft fixedly connected with first bevel gear 702 of third motor 701, first bevel gear 702 meshing is connected with four second bevel gears 704, consequently, can make four stereo sets 703 circular motion, because four stereo sets 703 all rotate and connect in the four walls of stereo set box 7, consequently, four stereo sets 703 can not break away from stereo set box 7 when rotating, consequently, four stereo sets can rotate to four sides space circulation, make the broadcast range more extensive.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.