CN216211785U - Novel teaching demonstration lever - Google Patents

Abstract

The utility model discloses a novel teaching demonstration lever, which comprises a base and a lever arm, wherein scales are arranged on the lever arm, the base is used as a foundation of the whole structure to play a bearing role, the base can be adsorbed on a teaching board, the lever arm is supported by the base and is rotatably connected with the base, a horizontal bubble is arranged on the lever arm to be used for displaying balance, pointers are arranged at two ends of the lever arm in a sliding mode and can be used for indicating the scales, other parts are not needed in the application, the stress area is large by adopting a magnetic attraction mode, the lever can be used as a foundation by depending on the existing teaching board in a classroom, a large adjustment space is provided, and the lever can be moved to any position of the teaching board in a teaching link to effectively demonstrate teaching.

Description

Novel teaching demonstration lever

Technical Field

The utility model relates to the technical field of teaching tools, in particular to a novel teaching demonstration lever.

Background

Physics is an important course in the study of junior high school, and mechanics is a more fundamental and more important part in physics teaching. Wherein the lever is as the teaching of the classic model commonly used term junior high school physics of mechanics, and traditional teaching lever model is put on the support, demonstrates on the podium. Because its height and stability all are limited by the size of support, present demonstration effect is not good enough, especially the difficult observation of the student of back row, if require better steadiness then the support size is great difficult for carrying simultaneously, and for portable then can sacrifice its steadiness when expanding the use. Therefore, the novel teaching demonstration lever can be combined with the actual conditions of the current junior middle school classroom to improve the demonstration effect of the teaching lever.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel teaching demonstration lever to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a novel teaching demonstration lever, includes base and lever arm, be equipped with the scale on the lever arm, the both ends of lever arm slide and are equipped with the pointer, can be used to instruct the scale, and wherein the base plays the bearing effect as the basis of whole structure, and the lever arm can the horizontal hunting be used for the show atress condition, the base can adsorb and be applicable to most teaching board condition on the teaching board to teaching board area has enough adjustment space greatly and is convenient for show, the lever arm is supported by the base, just rotate between lever arm and the base and be connected.

Preferably, the lever arm is connected with the support block through a screw, the support block is rotatably connected with the base through a bearing, and the lever arm is provided with a horizontal bubble for displaying the balance degree.

Preferably, the back of base is equipped with a plurality of mounting grooves, just through a plurality of magnets of screw installation in the mounting groove, it is more convenient to operate on the teaching board through the mode of magnetism, need not other operating procedure, open at the magnet center has the heavy head groove, lets the adsorption plane level and improves the steadiness.

Preferably, both ends of the lever arm are provided with adjusting knobs for adjusting the balance to correct the initial condition.

Preferably, the base is provided with a clamping groove, and a horizontal bubble is also arranged in the clamping groove, so that the installation position can be conveniently adjusted.

Preferably, the both ends of draw-in groove are equipped with the arch, just the lateral wall of draw-in groove is opened there is the fretwork groove, the both ends and the protruding activity joint of level bubble can be comparatively convenient assemble and dismantle.

Preferably, the lower end of the pointer is provided with a hook which can be used for hanging weights.

Preferably, the lever arm is movably connected with a heavy hammer for displaying balance.

Compared with the prior art, the utility model has the beneficial effects that: compare with traditional lever demonstration teaching aid, this application can adsorb and operate on the teaching board, need not other parts such as support frame, and the mode lifting surface area that adopts magnetism to inhale is big, can rely on the teaching board that has now in the classroom as the basis, has great adjustment space, can remove the any position of teaching board in the link of imparting knowledge to students, and this application has still attached level bubble, weight isotructure convenience show balanced effect in addition, does benefit to going on of classroom teaching link.

Drawings

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

FIG. 2 is a front view of the present invention;

FIG. 3 is a side view of the present invention;

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

FIG. 5 is a rear exploded view of the present invention;

FIG. 6 is an exploded view of the lever arm and ferrule of the present invention;

FIG. 7 is a schematic view of the structure of the present invention at the slot;

FIG. 8 is a schematic view of the base of the present invention;

fig. 9 is an exploded view of the structure of the bearing and pin of the present invention.

In the figure: 1. the device comprises a base, 2, a lever arm, 3, a magnet, 4, a mounting groove, 5, an adjusting knob, 501, a screw, 502, a clamping sleeve, 6, a horizontal bubble, 7, a clamping groove, 8, a hollow groove, 9, a support block, 10, a bearing, 11, a pointer, 12, a heavy hammer, 13, a support, 14, a mounting hole, 15 and a pin shaft.

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.

Referring to fig. 1-9, the present invention provides a novel lever technical solution for teaching demonstration: including base 1 and lever arm 2, be equipped with the scale on the lever arm 2, as shown in the figure, base 1 is for being the box body of long direction, and its back sets up weight saving material reduce cost simultaneously for the fretwork to inside is equipped with a plurality of mounting grooves 4, just through a plurality of magnet 3 of screw mounting in the mounting groove 4, 3 centers of magnet have opened the countersunk head groove, utilize the countersunk head groove to insert the screw and be connected with mounting groove 4, thereby guarantee the planarization of 3 external contact surfaces of magnet, make it can be better with the teaching board adsorptivity in the classroom, of course base 1 also can be through parts such as sucking disc and the teaching board adsorb and be connected, nevertheless adopt the operability and the convenience of magnet 3 better at present.

As shown in fig. 8, the front side of base 1 is equipped with support 13 that outwards stretches out, lever arm 2's section can carry out the joint with a piece 9 as shown in fig. 9, and for further connection fastening, a piece 9 is connected with lever arm 2 through the screw, and a piece 9 and support 13 all open mounting hole 14, install bearing 10 in the mounting hole 14 on a piece 9, and the inlayer of bearing 10 is pegged graft round pin axle 15, and the other end of round pin axle 15 inserts in the mounting hole 14 of support 13, thereby realize that lever arm 2 is supported and can rotate relatively by base 1, adopt support 13 can let lever arm 2 keep away from teaching board, base 1 prevents because of the friction that the skew leads to collide with, improves the demonstration effect.

As shown in fig. 1, a horizontal bubble 6 is mounted on the lever arm 2 below the mounting hole 14, and can be used to visually indicate whether the lever arm 2 is currently horizontal.

As shown in fig. 2, pointers 11 are slidably arranged at two ends of the lever arm 2 and used for indicating scales on the lever arm 2, and hooks are arranged at the lower ends of the pointers 11 and used for hanging weights such as weights and demonstrating the stress condition of the lever arm 2.

Sometimes because of make, use factors such as wearing and tearing, absolute balance can't be accomplished, in order to improve demonstration effect, lever arm 2's both ends all are equipped with adjust knob 5, on specific adjust knob 5 meshing connecting screw 501, screw 501 fixed connection is on cutting ferrule 502, form the joint installation between cutting ferrule 502 and lever arm 2's the section bar matches

In order to avoid the base 1 absorption to appear crooked the condition that leads to the demonstration failure on the teaching board, it has draw-in groove 7 to open on the base 1, also install horizontal bubble 6 in the draw-in groove 7, it is specific the both ends of draw-in groove 7 are equipped with the arch, just the lateral wall of draw-in groove 7 is opened there is fretwork groove 8, thereby horizontal bubble 6's both ends and protruding activity joint, base 1 and protruding all adopt the plastics material can form elastic deformation with the both ends of horizontal bubble 6 shells and take place the joint, the installation of the manufacturing of being convenient for to convenient for disassemble from the rear through the design of fretwork groove 8.

In addition, a hook is also arranged on the lower side surface of the supporting block 9 connected with the lever arm 2, the hook can be used for being movably connected with a vertical line of the heavy hammer 12, and the whole volume of the heavy hammer 12 and the vertical line is relatively large, so that the balance effect can be observed by students in the back row conveniently.

The working principle is as follows: assemble parts such as prop up piece 9 and lever arm 2 in advance, then adsorb base 1 on the teaching board through magnet 3 and adjust the level of base 1 through observing horizontal bubble 6 at first, later insert round pin axle 15 and realize being connected of base 1 and lever arm 2 in the mounting hole 14, then adjust the position of pointer 11, and adjust through adjust knob 5 and observe whether horizontal bubble 6 is balanced simultaneously, later the accessible stir pointer 11, hang modes such as heavy object and demonstrate that imparts knowledge to students, the accessible hangs weight 12 in addition and makes things convenient for the student of back row to observe.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a novel teaching demonstration lever, includes base (1) and lever arm (2), be equipped with the scale on lever arm (2), the both ends slip of lever arm (2) is equipped with pointer (11), its characterized in that: base (1) can adsorb on the teaching board, lever arm (2) are supported by base (1), just rotate between lever arm (2) and the base (1) and be connected.

2. The novel teaching demonstration lever of claim 1, wherein: the lever arm (2) is connected with a support block (9) through a screw, the support block (9) is rotatably connected with the base (1) through a bearing (10), and a horizontal bubble (6) is arranged on the lever arm (2).

3. The novel teaching demonstration lever of claim 1, wherein: the back of base (1) is equipped with a plurality of mounting grooves (4), just through a plurality of magnet (3) of screw installation in mounting groove (4), magnet (3) center is opened there is countersunk head groove.

4. The novel teaching demonstration lever of claim 1, wherein: and adjusting knobs (5) are arranged at two ends of the lever arm (2).

5. The novel teaching demonstration lever of claim 1, wherein: a clamping groove (7) is formed in the base (1), and a horizontal bubble (6) is also installed in the clamping groove (7).

6. The novel teaching demonstration lever of claim 5, wherein: the both ends of draw-in groove (7) are equipped with the arch, just the lateral wall of draw-in groove (7) is opened there is fretwork groove (8), the both ends and the protruding activity joint of level bubble (6).

7. The novel teaching demonstration lever of claim 1, wherein: the lower end of the pointer (11) is provided with a hook.

8. The novel teaching demonstration lever of claim 1, wherein: the lever arm (2) is movably connected with a heavy hammer (12).

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