CN215834099U

CN215834099U - Teaching demonstration device

Info

Publication number: CN215834099U
Application number: CN202122227258.3U
Authority: CN
Inventors: 杨雪梅; 胡宇琛; 郑淑娟
Original assignee: Jiaxing Vocational and Technical College
Current assignee: Jiaxing Vocational and Technical College
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2022-02-15
Anticipated expiration: 2031-09-15

Abstract

The utility model discloses a teaching demonstration device which comprises a bottom plate, wherein a first connecting plate is movably clamped at the top of the bottom plate, a second connecting plate is arranged on one side of the first connecting plate, sliding grooves are formed in the other side of the first connecting plate and the top of the second connecting plate, and a limiting device is arranged between the first connecting plate and the second connecting plate; stop device includes the third connecting plate, and third connecting plate slip joint is in the front of first connecting plate, the equal fixedly connected with locating lever of both sides side of third connecting plate one side, third connecting plate fixedly connected with handle, third connecting plate fixedly connected with fixture block. The utility model utilizes the matching use of the first connecting plate, the second connecting plate and the limiting device, and the limiting device comprises the connecting plate, the two positioning rods and the handle, so that the two positioning rods are driven by the handle to be separated from the first connecting plate and the second connecting plate, and the steel balls roll off on the first connecting plate and the second connecting plate simultaneously, thereby improving the test accuracy.

Description

Teaching demonstration device

Technical Field

The utility model relates to the field of demonstration devices, in particular to a teaching demonstration device.

Background

Because the knowledge in some physicochemical fields is more abstract, the teacher only relies on oral instruction and PPT demonstration and hardly lets the student understand thoroughly completely, help the teaching through relevant model, and let the student practice in person, so not only can become more lively with boring knowledge, let the acceptance and understanding that the student can relax, can also arouse student's interest in learning, can also alleviate teacher's teaching burden simultaneously, in physics free fall experiment and slope straight line acceleration test, the teacher can utilize to place a steel ball on the panel usually and test, then the inclination of artificial control panel is tested, and then can produce experimental error, thereby reduce its performance.

SUMMERY OF THE UTILITY MODEL

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

In order to achieve the purpose, the utility model provides the following technical scheme: a teaching demonstration device comprises a bottom plate, wherein a first connecting plate is movably clamped at the top of the bottom plate, a second connecting plate is arranged on one side of the first connecting plate, sliding grooves are formed in the other side of the first connecting plate and the top of the second connecting plate, and a limiting device is arranged between the first connecting plate and the second connecting plate;

the limiting device comprises a third connecting plate, the third connecting plate is connected to the front face of the first connecting plate in a sliding and clamping mode, and the two side sides of one side of the third connecting plate are fixedly connected with positioning rods.

Preferably, the front fixedly connected with handle of third connecting plate, the back fixedly connected with fixture block of third connecting plate, a plurality of draw-in grooves have been seted up to the front equidistance of first connecting plate, the outer wall of fixture block and the inner chamber slip joint of draw-in groove.

Preferably, the top of the bottom plate is fixedly connected with a positioning block, positioning holes are symmetrically formed in one side of the positioning block and the top of the bottom plate, the bottom of the first connecting plate is symmetrically and fixedly connected with a limiting rod, and the outer wall of the limiting rod is in sliding sleeve connection with the inner cavity of the positioning hole.

Preferably, the top of the bottom plate is fixedly connected with a limiting frame, and the top of the bottom plate is fixedly connected with a protective frame.

Preferably, the bottoms of the two sides of the second connecting plate are fixedly connected with pin shafts, and the outer walls of the pin shafts are rotatably inserted and sleeved with connecting blocks.

Preferably, the bottom of the two connecting blocks is fixedly connected with a supporting plate, and the bottom of the supporting plate is fixedly connected with a rubber block.

The utility model has the technical effects and advantages that:

(1) the first connecting plate, the second connecting plate and the limiting device are matched for use, and the limiting device comprises the connecting plate, the two positioning rods and the handle, so that the two positioning rods are driven by the handle to be separated from the first connecting plate and the second connecting plate, and the steel balls roll off the first connecting plate and the second connecting plate simultaneously, so that the test accuracy is improved;

(2) according to the utility model, the arrangement mode of the positioning block, the limiting frame and the protecting frame is utilized, the protecting frame can limit the steel balls, the steel balls are prevented from directly rolling off from the bottom plate, and the positioning block and the limiting frame can respectively store and limit the first connecting plate and the second connecting plate, so that the occupied space is reduced when the connecting plate is not used.

Drawings

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

Fig. 2 is a schematic side view of the first connecting plate according to the present invention.

FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention.

In the figure: 1. a base plate; 2. a first connecting plate; 3. a second connecting plate; 4. a chute; 51. a third connecting plate; 52. positioning a rod; 53. a clamping block; 54. a handle; 6. a card slot; 7. a limiting rod; 8. positioning blocks; 9. positioning holes; 10. a limiting frame; 11. a protective frame; 12. connecting blocks; 13. a pin shaft; 14. a support plate; 15. a rubber block.

Detailed Description

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

The utility model provides a teaching demonstration device as shown in figures 1-3, which comprises a bottom plate 1, wherein a first connecting plate 2 is movably clamped at the top of the bottom plate 1, a second connecting plate 3 is arranged on one side of the first connecting plate 2, sliding grooves 4 are formed in the other side of the first connecting plate 2 and the top of the second connecting plate 3 respectively, the other side of the first connecting plate 2 and the top of the second connecting plate 3 are smooth planes respectively, so that test errors generated by friction between the first connecting plate 2, the second connecting plate 3 and balls are reduced, and a limiting device is arranged between the first connecting plate 2 and the second connecting plate 3.

The limiting device comprises a third connecting plate 51, the third connecting plate 51 is clamped on the front surface of the first connecting plate 2 in a sliding manner, two side edges of one side of the third connecting plate 51 are fixedly connected with a positioning rod 52, the positioning rods 52 can limit the positions of steel balls on the first connecting plate 2 and the second connecting plate 3, thereby enabling the two steel balls to carry out free falling and slope acceleration tests at the same height and time, thereby improve its teaching test's accurate nature, third connecting plate 51's positive fixedly connected with handle 54, third connecting plate 51's back fixedly connected with fixture block 53, fixture block 53 cup joints with the draw-in groove 6 of different positions department slip, just can make the steel ball follow first connecting plate 2 and the not co-altitude of second connecting plate 3 experiment of imparting knowledge to students, a plurality of draw-in grooves 6 have been seted up to the positive equidistance of first connecting plate 2, the outer wall of fixture block 53 and the inner chamber slip joint of draw-in groove 6.

Locating hole 9 has been seted up to bottom plate 1's top fixedly connected with locating piece 8, locating piece 8's one side and the equal symmetry in top of bottom plate 1, the symmetrical fixedly connected with gag lever post 7 in bottom of first connecting plate 2, the outer wall of gag lever post 7 cup joints with the inner chamber of locating hole 9 slides, bottom plate 1's spacing frame of top fixedly connected with 10, bottom plate 1's top fixedly connected with protective frame 11, protective frame 11 can prescribe a limit to the steel ball that rolls on first connecting plate 2 and the second connecting plate 3, avoid it to roll and fall out bottom plate 1 and lose.

The equal fixedly connected with round pin axle 13 in bottom at 3 both sides of second connecting plate, the outer wall of round pin axle 13 rotates to alternate and has cup jointed connecting block 12, the bottom fixedly connected with backup pad 14 of two connecting blocks 12, the bottom fixedly connected with block rubber 15 of backup pad 14, block rubber 15 can increase the frictional force between backup pad 14 and the bottom plate 1 to improve the stability that second connecting plate 3 put.

The working principle of the utility model is as follows: when a teacher conducts a physical test, firstly, the limiting rod 7 at one end of the first connecting plate 2 is separated from the positioning hole 9 on the positioning block 8, the limiting rod 7 at the bottom of the first connecting plate 2 is in sliding sleeve connection with the positioning hole 9 on the bottom plate 1, then the second connecting plate 3 is taken out of the limiting frame 10 and placed at one side of the first connecting plate 2, then the clamping block 53 on the third connecting plate 51 is in sliding sleeve connection with the clamping groove 6 on the first connecting plate 2, then the second connecting plate 3 is moved, the top of the second connecting plate 3 is attached to the positioning rod 52 at one side of the third connecting plate 51, the second connecting plate 3 is abandoned to be kept in a stable state under the action of the connecting block 12, the pin shaft 13, the supporting plate 14 and the rubber block 15, then two steel balls are taken out and respectively placed in the sliding grooves 4 on the first connecting plate 2 and the second connecting plate 3, and the steel balls are kept in a stable state under the action of the two positioning rods 52 at one side of the third connecting plate 51, then, the handle 54 is used for driving the third connecting plate 51 and the two positioning rods 52 to be separated from the first connecting plate 2, the two steel balls do free falling motion on one side of the first connecting plate 2 and do straight line acceleration motion obliquely downwards on the top of the second connecting plate 3 respectively without limitation of the positioning rods 52, then test results are observed, the steps are repeated, the third connecting plate 51 is installed at different height positions on one side of the first connecting plate 2, the inclination angle of the second connecting plate 3 is changed, and multiple tests are conducted.

After the test is finished, the second connecting plate 3 is placed on the bottom plate 1, the second connecting plate 3 is in sliding sleeve connection with the limiting frame 10, then the first connecting plate 2 is pulled out, and the two limiting rods 7 at the bottom of the first connecting plate 2 are in sliding sleeve connection with the positioning holes 9 in the positioning block 8.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. A teaching demonstration device comprises a bottom plate (1), and is characterized in that a first connecting plate (2) is movably clamped at the top of the bottom plate (1), a second connecting plate (3) is arranged on one side of the first connecting plate (2), sliding grooves (4) are formed in the other side of the first connecting plate (2) and the top of the second connecting plate (3), and a limiting device is arranged between the first connecting plate (2) and the second connecting plate (3);

stop device includes third connecting plate (51), third connecting plate (51) slip joint is in the front of first connecting plate (2), the equal fixedly connected with locating lever (52) of both sides side of third connecting plate (51) one side.

2. The teaching demonstration device according to claim 1, wherein a handle (54) is fixedly connected to the front surface of the third connecting plate (51), a clamping block (53) is fixedly connected to the back surface of the third connecting plate (51), a plurality of clamping grooves (6) are formed in the front surface of the first connecting plate (2) at equal intervals, and the outer wall of the clamping block (53) is in sliding clamping connection with the inner cavity of the clamping groove (6).

3. The teaching demonstration device according to claim 1, wherein a positioning block (8) is fixedly connected to the top of the base plate (1), positioning holes (9) are symmetrically formed in one side of the positioning block (8) and the top of the base plate (1), a limiting rod (7) is symmetrically and fixedly connected to the bottom of the first connecting plate (2), and the outer wall of the limiting rod (7) is slidably sleeved with the inner cavity of the positioning hole (9).

4. An educational demonstration device according to claim 1, wherein a limiting frame (10) is fixedly connected to the top of the base plate (1) and a protective frame (11) is fixedly connected to the top of the base plate (1).

5. A teaching demonstration device according to claim 1, wherein the bottom of the two sides of the second connecting plate (3) is fixedly connected with a pin shaft (13), and the outer wall of the pin shaft (13) is rotatably inserted and sleeved with a connecting block (12).

6. A teaching demonstration device according to claim 5 wherein the bottom of both said connection blocks (12) is fixedly connected with a support plate (14), the bottom of said support plate (14) is fixedly connected with a rubber block (15).