CN210166957U

CN210166957U - Ideological and political theory teaching is with plain type presentation device

Info

Publication number: CN210166957U
Application number: CN201920507594.3U
Authority: CN
Inventors: 孙阳; 杜欢
Original assignee: Shaanxi Vocational and Technical College
Current assignee: Shaanxi Vocational and Technical College
Priority date: 2019-04-15
Filing date: 2019-04-15
Publication date: 2020-03-20
Anticipated expiration: 2029-04-15

Abstract

The utility model discloses a simple demonstration device for ideological and political theory teaching, which comprises a stand column, a curtain, a fixed seat and a micro digital projector, wherein the rear side wall of the lower section of the stand column is hinged with two support legs which are unfolded outwards, the lower ends of the support legs are fixedly connected with the top surface of an installation plate, a bolt is installed in a screw hole on the installation plate, and a single-wheel universal wheel is installed at the lower end of the bolt; the utility model discloses a with landing leg and second buckle joint, first branch and first buckle joint, roll up the curtain on the upper cross rod and utilize the bandage ring to make upper cross rod and bottom rail bind, through ninety degrees of rotatory bottom rail, and make the slider slide down to first inner chute lower extreme and adsorb with the magnet piece, and then tie up upper cross rod and bottom rail through the bandage, make both vertical fix on the stand, can hold the pull ring with the hand and drag the walking, convenient to carry; in addition, the miniature digital projector for projection is light and small, the two support plates can be folded and attached to the bottom surface of the miniature digital projector, and the carrying belt is convenient to carry.

Description

Ideological and political theory teaching is with plain type presentation device

Technical Field

The utility model relates to a teaching aid equipment technical field specifically is a plain type presentation device is used in ideological and political theory teaching.

Background

Ideology and politics mainly includes that basic training of professional skills and methods of ideological and political education is received, basic ability of the ideological and political work is mastered, the ideological and political work can be carried out in party and political institutions, schools and enterprise and public institutions, and advanced specialized talents for teaching and scientific research of Marxism theory and ideological and political education discipline are carried out in schools above medium-level specialties.

At present, book teaching is mostly adopted in ideological and political theory teaching, multimedia teaching is adopted in schools with better conditions, but areas with backward conditions or schools have no multimedia teaching at all, or the multimedia teaching can not be adopted temporarily due to the reasons of teacher decoration, equipment maintenance and the like, the ideological and political theory teaching is stiff, the enthusiasm of students can not be improved, the teaching effect is influenced, a device which is convenient to carry is urgently needed, the teaching demonstration can be carried out at any time, teaching demonstration materials can be collected through multiple channels, and a convenient device is provided for teaching; accordingly, those skilled in the art have provided a simplified demonstration apparatus for ideological and political theory teaching to solve the problems set forth in the above background art.

Disclosure of Invention

An object of the utility model is to provide a plain type presentation device is used in ideological and political theory teaching to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a simple demonstration device for ideological and political theory teaching comprises a stand column, a curtain, a fixed seat and a micro digital projector matched with the demonstration device, wherein two support legs which are unfolded outwards are symmetrically hinged on the left and right of the rear side wall of the lower section of the stand column; the front side of the upper section of the upright post is provided with a vertical first outer chute, the back side of the first outer chute is communicated with a first inner chute which is vertically arranged in the upright post, the upper section of the upright post is fixedly connected with a fixed seat, the front side of the fixed seat is provided with a vertical second outer chute, the back side of the second outer chute is communicated with a second inner chute which is arranged in the fixed seat, the lower ports of the second outer chute and the second inner chute are respectively aligned with and communicated with the upper ports of the first outer chute and the first inner chute, a sliding block is arranged in the second inner chute, the sliding block is in sliding connection with the second inner chute and is matched with the first inner chute, the bottom of the right side of the fixed seat is provided with a horizontal slot, an inserting plate is inserted in the slot, the bottom of the sliding block is contacted with the top surface of the inserting plate, the top of the fixed seat is in threaded connection with a cover plate, the front side of the sliding block is rotatably connected with a rotating column, the rotating column is in sliding connection with a second outer sliding groove and is matched with a first outer sliding groove, the front end of the rotating column is fixedly connected with the back side of the middle part of a lower cross rod, the lower cross rod is fixedly connected with the lower edge of an unfolded curtain, the upper edge of the curtain is fixedly connected with an upper cross rod, thin waists are arranged at the left end and the right end of the lower cross rod and the upper cross rod, and a bandage ring is sleeved on the thin waist of the lower cross rod; the left side and the right side of the fixed seat are hinged with two first supporting rods symmetrically, the upper end of each first supporting rod is provided with threads and is in threaded fit with the lower end of the double-head screw sleeve, the upper end of the double-head screw sleeve is in threaded fit with the lower end of a second supporting rod, the front end of the second supporting rod is fixedly connected with a U-shaped fork, and the left U-shaped fork and the right U-shaped fork are arranged at the thin waist parts at the two ends of the; the miniature digital projector comprises a miniature digital projector and is characterized in that a projector head is arranged on the left side of the miniature digital projector, a focusing knob is arranged at the joint of the projector head and the left side of the miniature digital projector, an on-off key and a plurality of function keys are arranged at the top of the miniature digital projector, a loudspeaker is arranged on the right side of the miniature digital projector, a USB (universal serial bus) interface, a data interface and an external socket are sequentially arranged on the front side of the miniature digital projector, a carrying belt is arranged on the miniature digital projector, two ends of the carrying belt are respectively connected with the front side wall and the rear side wall of the miniature digital projector, and supporting.

As a further aspect of the present invention: and a locking shaft convenient for fixing the single-wheel universal wheel is arranged on the single-wheel universal wheel.

As a further aspect of the present invention: two tilted lugs are fixedly connected to the upper end of the bolt.

As a further aspect of the present invention: and a magnet block is arranged at the bottom of the lower end of the first inner chute in the upright post.

As a further aspect of the present invention: the thread directions of the two ends of the double-end thread insert are opposite.

As a further aspect of the present invention: the self-forming magnet is fixedly mounted on the right side wall of the fixing seat corresponding to the inserting plate, the inserting plate penetrates through the inner ring of the self-forming magnet, and the right end of the inserting plate is fixedly connected with an iron baffle.

As a further aspect of the present invention: the side wall of the upper part of the upright post is provided with a bandage, and the front end and the tail part of the bandage are provided with nylon agraffes matched with each other.

As a further aspect of the present invention: and a circuit board inside the miniature digital projector is provided with a wireless communication module.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model has reasonable structural design, the supporting legs are clamped with the second buckles, the first supporting rod is clamped with the first buckles, the curtain is wound on the upper cross rod and the lower cross rod are bound by utilizing the bandage rings, the lower cross rod is rotated by ninety degrees, the sliding block slides to the lower end of the first inner chute to be adsorbed by the magnet block, and the upper cross rod and the lower cross rod are bound by the bandage to be vertically fixed on the upright post, so that the upper cross rod and the lower cross rod can be pulled to walk by holding the pull ring with hands, and the carrying is convenient; in addition, the micro digital projector for projection can establish WLAN (wireless local area network) hotspot connection with a computer or a mobile phone through a five-wire communication module on the circuit board to transmit PPT files, pictures or videos to the micro digital projector and project the PPT files, the pictures or the videos to a curtain, and the demonstration during ideological and political education is completed.

Drawings

FIG. 1 is a schematic structural diagram of a simple demonstration device for ideological and political theory teaching.

Fig. 2 is an enlarged schematic view of a point a of a simplified type demonstration apparatus for ideological and political theory teaching.

Fig. 3 is an enlarged schematic view of a section B of a simplified type demonstration apparatus for ideological and political theory teaching.

Fig. 4 is an enlarged schematic view of a simple demonstration apparatus for ideological and political theory teaching at position C.

FIG. 5 is a schematic diagram of a cross-sectional structure of a double-end swivel nut in a simplified demonstration device for ideological and political theory teaching

FIG. 6 is a schematic view of a connection structure of stand and locating part in plain type presentation device for ideological and political theory teaching

FIG. 7 is a three-dimensional structure sketch map of locating part among plain type presentation device for ideological and political theory teaching

FIG. 8 is a schematic structural diagram of a miniature digital projector in a simplified presentation device for ideological and political theory teaching

In the figure: the portable electronic device comprises a stand column 1, a first outer slide groove 101, a first inner slide groove 102, a magnet block 103, a bandage 104, a leg 2, a mounting plate 3, a bolt 4, a lug 401, a single-wheel universal wheel 5, a double-wheel universal wheel 6, a limiting member 7, a first buckle 8, a second buckle 9, a pull ring 10, a curtain 11, a fixed seat 12, a second outer slide groove 121, a second inner slide groove 122, a slot 123, a slide block 13, a cover plate 14, a spring 15, an inserting plate 16, a baffle 161, a self-returning magnet 17, a rotary column 18, a lower cross bar 19, an upper cross bar 190, a slender waist 191, a first support bar 20, a double-head thread sleeve 21, a second support bar 22, a U-shaped fork 221, a bandage ring 23, a miniature digital projector 24, a projection head 241, a focusing knob 242, a loudspeaker 243, a switch key 244, a function key 245, a USB interface 246, a data interface 247, an outer jack 248, a damping hinge 249, a support plate 2410.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one.. said element does not exclude the presence of other like elements in the process, method, article or apparatus that comprises the element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 8, in an embodiment of the present invention, a simplified demonstration apparatus for ideological and political education comprises a stand column 1, a curtain 11, a fixing base 12 and a micro digital projector 24 matched with the demonstration apparatus, wherein two legs 2 extending outward are hinged to the lower section of the stand column 1 at the left and right sides symmetrically, the lower ends of the legs 2 are fixedly connected to the top surface of a mounting plate 3, a bolt 4 is installed in a screw hole on the mounting plate 3, the lower end of the bolt 4 penetrates through the mounting plate 3 and is provided with a single-wheel universal wheel 5, a double-wheel universal wheel 6 is installed at the bottom of the stand column 1, a limiting part 7 is fixedly connected to the hinge point of the legs 2 on the rear side wall of the stand column 1, two first buckles 8 are fixedly connected to the left and right side wall of the middle part of the stand; a vertical first outer sliding groove 101 is formed in the front face of the upper section of the upright post 1, the back face of the first outer sliding groove 101 is communicated with a first inner sliding groove 102 vertically arranged in the upright post 1, a fixed seat 12 is fixedly connected to the upper section of the upright post 1, a vertical second outer sliding groove 121 is formed in the front face of the fixed seat 12, the back face of the second outer sliding groove 121 is communicated with a second inner sliding groove 122 arranged in the fixed seat 12, the lower end openings of the second outer sliding groove 121 and the second inner sliding groove 122 are respectively aligned with and communicated with the upper end openings of the first outer sliding groove 101 and the first inner sliding groove 102, a sliding block 13 is arranged in the second inner sliding groove 122, the sliding block 13 is slidably connected with the second inner sliding groove 122 and is matched with the first inner sliding groove 102, a horizontal slot 123 is formed in the bottom of the right side of the fixed seat 12, an inserting plate 16 is inserted in the slot 123, the bottom of the sliding block, the bottom of the cover plate 14 is fixedly connected with a spring 15, the spring 15 is positioned in the second inner chute 122, the lower end of the spring 15 props against the top surface of the sliding block 13, the front surface of the sliding block 13 is rotatably connected with a rotary column 18, the rotary column 18 is in sliding connection with the second outer chute 121 and is matched with the first outer chute 101, the front end of the rotary column 18 is fixedly connected with the middle back surface of the lower cross bar 19, the lower cross bar 19 is fixedly connected with the lower edge of the unfolded curtain 11, the upper edge of the curtain 11 is fixedly connected with the upper cross bar 190, the left and right ends of the lower cross bar 19 and the upper cross bar 190 are both provided with thin waists 191, and the thin waists of; the left side and the right side of the fixed seat 12 are hinged with two first supporting rods 20 symmetrically, the upper end of each first supporting rod 20 is provided with threads and is in threaded fit with the lower end of the double-head threaded sleeve 21, the upper end of the double-head threaded sleeve 21 is in threaded fit with the lower end of the second supporting rod 22, the front end of the second supporting rod 22 is fixedly connected with a U-shaped fork 221, and the left U-shaped fork 221 and the right U-shaped fork 221 are forked at the thin waist 191 at the two ends of the upper cross rod; a projection head 241 is arranged on the left side of the miniature digital projector 24, a focusing knob 242 is arranged at the joint of the projection head 241 and the left side of the miniature digital projector 24, an on-off key and a plurality of function keys 245 (such as a pause key, a circulation key, a switching key, a volume adjusting key and the like) are arranged on the top of the miniature digital projector 24, a loudspeaker 243 is arranged on the right side of the miniature digital projector 24, a USB interface 246, a data interface 247 and an external socket 248 are sequentially arranged on the front side of the miniature digital projector 24, a carrying belt 2411 is arranged on the miniature digital projector 24, two ends of the carrying belt 2411 are respectively connected with the front side wall and the rear side wall of the miniature digital projector 24, and a carrying plate 2410 is hinged to the left side and the right side; the damping hinge 249 is a conventional one, and has the same structure as a damping hinge for opening and closing a display screen of a notebook computer, and will not be described in detail herein.

And a locking shaft convenient for fixing the single-wheel universal wheel 5 is arranged on the single-wheel universal wheel.

Two tilted lugs 401 are fixedly connected to the upper end of the bolt 4, so that the bolt 4 can be conveniently screwed, and the bolt 4 can be screwed in or out relative to the mounting plate 3, so that the height of the mounting plate 3 at the lower end of the supporting leg 2 can be adjusted.

The bottom of the lower end of the first inner chute 102 in the upright post 1 is provided with a magnet block 103, and when the sliding block 13 slides to the lower end of the first inner chute 102, the magnet block 103 adsorbs the sliding block 13 to prevent the sliding.

The two ends of the double-ended screw sleeve 21 are oppositely threaded, so that when the double-ended screw sleeve 21 is screwed, the first support rod 20 and the second support rod 22 are simultaneously screwed out or in, and the U-shaped fork 221 at the front end of the second support rod 22 is tightly crossed with the thin waist 191 at the two ends of the upper cross rod 190.

A self-returning magnet 17 is fixedly arranged on the right side wall of the fixed seat 12 corresponding to the inserting plate 16, the inserting plate 16 penetrates through the inner ring of the self-returning magnet 17, and the right end of the inserting plate 16 is fixedly connected with an iron baffle 161; when the insert plate 16 is inserted into the slot 123 of the fixing base 12, the resilient magnet 17 attracts the blocking plate 161 to prevent it from loosening.

The side wall of the upper part of the upright post 1 is provided with a bandage 104, and the front end and the tail part of the bandage 104 are provided with nylon buckles matched with each other.

A wireless communication module, including a communication chip and an antenna, is disposed on the circuit board 2412 inside the miniature digital projector 24, and is used to establish a WLAN (wireless local area network) hot spot connection with a computer or a mobile phone, and transmit data to the miniature digital projector 24, where the miniature digital projector 24 projects data onto the curtain 11.

The utility model discloses a theory of operation is:

the utility model relates to a simple demonstration device for ideological and political theory teaching, during operation, the curtain 11 is unfolded by the upper cross bar 190 and the lower cross bar 19, put the miniature digital projector 24 on the podium or the appropriate position and supply power, because of the setting of the damping hinge 249, two support plates 2410 can rotate at will and stay fixed at the bottom of the miniature digital projector 24 (when the miniature digital projector 24 is not used for collecting, two support plates 2410 can rotate oppositely and fit the bottom surface of the miniature digital projector 24, which is convenient for storage), the two support plates 2410 are adjusted by rotating, the projection head 241 of the miniature digital projector 24 faces the curtain 11 and utilizes the focusing knob 242 to adjust the focal length, then the computer or the mobile phone is provided with a wireless communication module on the circuit board 2412 to establish WLAN (wireless local area network) hotspot connection with the miniature digital projector 24, or the miniature digital projector 24 is connected with the computer through a data line and a data interface 247, or the USB disk is inserted into the USB interface 246, so that the PPT file, the picture or the video is transmitted to the micro digital projector 24 and projected onto the curtain 11, thereby completing the demonstration during ideological and political education, the contents and the forms are various, the teaching effect is improved, the micro digital projector 24 is light and small, the two support plates 2410 can be folded and attached to the bottom surface of the micro digital projector 24, and the carrying belt 2411 is convenient to carry; when the ideological and political treatment and education are carried out, the double-head thread sleeve 21 is screwed to lead the first support rod 20 and the second support rod 22 to be screwed into the double-head thread sleeve 21, the U-shaped fork 221 is separated from the thin waist 191 at the two ends of the upper cross rod 190, then the first support rod 20 is clamped on the first buckle 8 to be fixed, then the curtain is wound up by rotating the upper cross rod 190, the lower cross rod 19 and the upper cross rod 190 are sleeved on the thin waist 191 at the two ends of the lower cross rod 19 and the upper cross rod 190 by the tightening band 23, the lower cross rod 19 and the upper cross rod 190 are vertical, then the inserting plate 16 is drawn out from the slot 123, the sliding block 13 slides downwards to the lower end of the first inner sliding groove 102 in the upright post 1 to be adsorbed with the magnet block 103, the lower cross rod 19 and the upper cross rod 190 are tightened by the bandage 104 to be dragged to lead the vertical fixed upright post 1, then the two support legs 2 are clamped on the second opening 9, at the moment, the pull ring 10 can be held by hands to walk, is convenient to carry.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A simple demonstration device for ideological and political theory teaching, which comprises a column (1), a curtain (11), a fixed seat (12) and a micro digital projector (24) matched with the demonstration device, the novel vertical column is characterized in that two support legs (2) which are unfolded outwards are hinged to the rear side wall of the lower section of the vertical column (1) in a bilateral symmetry mode, the lower ends of the support legs (2) are fixedly connected to the top surface of a mounting plate (3), bolts (4) are installed in screw holes in the mounting plate (3), the lower ends of the bolts (4) penetrate through the mounting plate (3) and are provided with single-wheel universal wheels (5), double-wheel universal wheels (6) are installed at the bottom of the vertical column (1), a limiting part (7) is fixedly connected to the hinged position of the rear side wall of the vertical column (1) and the support legs (2), two first buckles (8) are fixedly connected to the left side wall and the right side wall of the middle of the vertical column (; the front side of the upper section of the upright post (1) is provided with a vertical first outer sliding groove (101), the back side of the first outer sliding groove (101) is communicated with a first inner sliding groove (102) vertically arranged in the upright post (1), the upper section of the upright post (1) is fixedly connected with a fixed seat (12), the front side of the fixed seat (12) is provided with a vertical second outer sliding groove (121), the back side of the second outer sliding groove (121) is communicated with a second inner sliding groove (122) arranged in the fixed seat (12), the lower end openings of the second outer sliding groove (121) and the second inner sliding groove (122) are respectively aligned with and communicated with the upper end openings of the first outer sliding groove (101) and the first inner sliding groove (102), a sliding block (13) is arranged in the second inner sliding groove (122), the sliding block (13) is in sliding connection with the second inner sliding groove (122) and is matched with the first inner sliding groove (102), the bottom of the right side of the fixed seat (12) is provided with a horizontal slot (123, the bottom of the sliding block (13) is contacted with the top surface of the inserting plate (16), the top of the fixed seat (12) is in threaded connection with a cover plate (14), the top of the cover plate (14) is fixedly connected with a pull ring (10), the bottom of the cover plate (14) is fixedly connected with a spring (15), the spring (15) is positioned in the second inner sliding groove (122), the lower end of the spring (15) abuts against the top surface of the sliding block (13), the front surface of the sliding block (13) is rotatably connected with a rotating column (18), the rotating column (18) is in sliding connection with a second outer sliding groove (121) and is matched with a first outer sliding groove (101), the front end of the rotating column (18) is fixedly connected with the back surface of the middle part of a lower cross rod (19), the lower cross rod (19) is fixedly connected with the lower edge of an unfolded curtain (11), the upper edge of the curtain (11) is fixedly connected with an upper cross rod (190), thin waists (191) are arranged at the left end and the right end of the lower cross rod (19) and the upper cross rod (190), and a tightening belt ring (23) is sleeved on the thin waist of the lower; the left side and the right side of the fixed seat (12) are hinged with two first supporting rods (20) symmetrically, the upper ends of the first supporting rods (20) are provided with threads and are in rotary fit with the lower end of the double-head threaded sleeve (21), the upper end and the lower end of the double-head threaded sleeve (21) are provided with threaded second supporting rods (22) in rotary fit, the front end of each second supporting rod (22) is fixedly connected with a U-shaped fork (221), and the left U-shaped fork and the right U-shaped fork (221) are forked at the thin waist (191) at the two ends of the upper cross rod; the left side of the miniature digital projector (24) is provided with a projection head (241), the joint of the projection head (241) and the left side of the miniature digital projector (24) is provided with a focusing knob (242), the top of the miniature digital projector (24) is provided with an on-off key and a plurality of function keys (245), the right side of the miniature digital projector (24) is provided with a loudspeaker (243), the front side of the miniature digital projector (24) is sequentially provided with a USB interface (246), a data interface (247) and an external socket (248), the miniature digital projector (24) is provided with a carrying belt (2411), two ends of the carrying belt (2411) are respectively connected with the front side wall and the rear side wall of the miniature digital projector (24), and the left side and the right side of the bottom of the miniature digital projector (24) are hinged with support plates (2410) through.

2. A simplified ideological and political teaching demonstration apparatus according to claim 1 wherein the single-wheeled castor (5) is provided with a locking shaft to facilitate its fixing.

3. The simple demonstration device for ideological and political theory teaching of claim 1, wherein two tilted lugs (401) are fixedly connected to the upper end of the bolt (4).

4. The simplified ideological and political theory teaching demonstration device according to claim 1, wherein a magnet block (103) is arranged at the bottom of the lower end of the first inner chute (102) in the upright post (1).

5. A simplified ideological and political demonstration apparatus according to claim 1 wherein the two threaded sleeves (21) are threaded in opposite directions.

6. The simple demonstration device for ideological and political theory teaching of claim 1, wherein a self-returning magnet (17) is fixedly installed on the right side wall of the fixed seat (12) corresponding to the insertion plate (16), the insertion plate (16) penetrates through the inner ring of the self-returning magnet (17), and an iron baffle plate (161) is fixedly connected to the right end of the insertion plate (16).

7. The simple demonstration device for ideological and political theory teaching of claim 1, wherein the upper side wall of the upright post (1) is provided with a bandage (104), and the front end and the tail end of the bandage (104) are provided with adaptive nylon buckles.

8. The simple demonstration device for ideological and political theory teaching of claim 1, wherein a wireless communication module is arranged on a circuit board (2412) inside the miniature digital projector (24).