CN210378013U

CN210378013U - Frictional force presentation device for physical teaching convenient to accomodate and carry

Info

Publication number: CN210378013U
Application number: CN201920309389.6U
Authority: CN
Inventors: 张铎沥
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2020-04-21
Anticipated expiration: 2029-03-12

Abstract

The utility model provides a frictional force presentation device for physical teaching convenient to accomodate and carry, includes first bar-shaped plate, first bar-shaped groove is seted up to the top surface of first bar-shaped plate, is equipped with second bar-shaped plate in the first bar-shaped groove, and both sides right-hand member passes through the hinge post with the front and back both sides right-hand member of first bar-shaped groove respectively around the second bar-shaped plate to be connected, and the blind hole is seted up at the left side middle part of second bar-shaped plate, is equipped with the movable rod in the blind hole, and the right-hand member of movable rod passes. The utility model discloses a presentation device can support fast when using, need not to assemble before the use, can further shorten the preparation work before the class, consequently the utility model discloses a presentation device can further avoid occuping student's classroom time when using, and then can further prolong student's study time, is favorable to further improving student's learning efficiency.

Description

Frictional force presentation device for physical teaching convenient to accomodate and carry

Technical Field

The utility model belongs to physical teaching equipment field, specifically speaking are friction force presentation device for physical teaching convenient to accomodate and carry.

Background

The force resisting the relative movement (or relative movement trend) of the object is called friction force, the friction force is divided into static friction force, rolling friction and sliding friction, wherein the magnitude of the sliding friction force is related to the magnitude of the roughness of the contact surface and the magnitude of the pressure; in order to enable students to more intuitively know the influence of the roughness and the pressure of the contact surface on the sliding friction force in the teaching process, the friction force demonstration device is invented, but the existing demonstration device needs to be assembled firstly when in use, needs to consume a large amount of time when being assembled, further needs to occupy the classroom time of the students, and accordingly the study time of the students is shortened, the study efficiency is reduced, and the use is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a frictional force presentation device for physical teaching convenient to accomodate and carry for solve the defect among the prior art.

The utility model discloses a following technical scheme realizes:

a friction force demonstration device for physics teaching convenient to store and carry comprises a first strip-shaped plate, wherein a first strip-shaped groove is formed in the top surface of the first strip-shaped plate, a second strip-shaped plate is arranged in the first strip-shaped groove, the right ends of the front side and the rear side of the second strip-shaped plate are respectively hinged with the right ends of the front side and the rear side of the first strip-shaped groove through hinge columns, a blind hole is formed in the middle of the left side of the second strip-shaped plate, a movable rod is arranged in the blind hole, the right end of the movable rod is connected with the inner wall of the blind hole through a spring, a through hole is formed in the middle of the inner wall of the left side of the first strip-shaped groove, the left end of the movable rod can be inserted into the through hole, a plurality of strip-shaped chutes which are uniformly distributed are formed in the top surface of the second strip-shaped plate, strip-shaped chutes and, the front and back both sides of dynamometer insert the bar limiting groove that corresponds respectively and can follow it and slide, respectively fixed mounting stopper is equallyd divide at the both sides middle part around the slider, the stopper inserts the bar limiting groove that corresponds respectively and can follow it and slide, the bottom surface of slider can be respectively with the bottom surface inner wall contact cooperation of the bar spout that corresponds, the second bar recess is seted up in the bottom surface left side of second bar board, be equipped with the bar limiting plate in the second bar recess, the both sides left end is connected through hinge post is articulated with the both sides left end around the second bar recess respectively around the bar limiting plate, several evenly distributed's spacing hole is seted up in the bottom surface inner wall left side of first bar recess, the right-hand member of bar limiting plate can insert spacing downthehole.

According to the friction force demonstration device for physics teaching, which is convenient to store and carry, the level meter is fixedly installed on the left side of the top surface of the second strip-shaped plate.

According to the friction force demonstration device convenient to store and carry for physical teaching, the rollers are fixedly installed at the front end and the rear end of the bottom of the right side of the first strip-shaped plate respectively.

According to the friction force demonstration device for physics teaching, which is convenient to store and carry, the handle is fixedly installed at the bottom of the left side of the first strip-shaped plate.

According to the friction force demonstration device for physics teaching, which is convenient to store and carry, the protractor is fixedly installed at the right end of the front surface of the first strip-shaped plate, and the central point of the protractor is collinear with the central line of the hinged point of the second strip-shaped plate and the first strip-shaped groove.

As the friction force demonstration device for physics teaching convenient to store and carry is described above, the inner wall of the bottom surface of the strip-shaped sliding groove is respectively paved with different materials, namely, the roughness of the inner wall of the bottom surface of the strip-shaped sliding groove is different.

As the friction force demonstration device for physics teaching convenient to store and carry is described, the sliding blocks are magnetic blocks, the top surfaces of the sliding blocks can be provided with weight increasing blocks communicated with gravity, and the weight increasing blocks can be attracted with the sliding blocks magnetically.

The utility model has the advantages that: when in use, the demonstration device of the utility model is horizontally placed on the ground, when in an initial state, the spring is in a free state, the left end of the movable rod is inserted into the through hole at the moment, then the movable rod is pressed, and then the movable rod can move rightwards along the blind hole and compress the spring, thereby separating the left end of the movable rod from the through hole, at the moment, the left end of the second strip-shaped plate can be lifted, and then the second strip-shaped plate can be turned upwards by taking the corresponding hinge point as the center, meanwhile, the strip-shaped limiting plate can be turned downwards by taking the corresponding hinge point as the center under the action of gravity, when the left end of the second strip-shaped plate is turned upwards, the right end of the strip-shaped limiting plate can slide towards the left side along the inner wall of the bottom surface of the first strip-shaped groove, when the second strip-shaped plate is adjusted to a proper inclination angle, the right end of the strip-shaped limiting plate can be inserted into the, then the sliders are uniformly moved to the right ends of the corresponding strip-shaped sliding grooves respectively, the dynamometer is pulled to move towards the left side, the dynamometer can pull the corresponding sliders to slide towards the left side along the inner wall of the bottom surface of the corresponding strip-shaped sliding grooves through the thin lines respectively, and the corresponding friction force numerical value can be obtained through reading the numerical value of the dynamometer at the moment. The utility model discloses a presentation device can support fast when using, need not to assemble before the use, can further shorten the preparation work before class, consequently the utility model discloses a presentation device can further avoid occuping student's classroom time when using, and then can further prolong student's study time, is favorable to further improving student's learning efficiency, and the utility model discloses a presentation device is the integral structure, does not have independent part, consequently can further avoid taking place the phenomenon that the part is lost, and portable more is more convenient when using, is fit for using widely. The position of the slider that corresponds and dynamometer can be injectd respectively to the bar spacing groove, and then can further prevent slider and dynamometer from taking place the skew, thereby can further improve the utility model discloses a stability of presentation device when using, it is more convenient when using.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of the present invention; FIG. 2 is a view in the direction A of FIG. 1; FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1; FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1; FIG. 5 is an enlarged view of section I of FIG. 1; fig. 6 is a partial enlarged view of ii of fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

A friction force demonstration device for physics teaching convenient to store and carry comprises a first strip-shaped plate 1, wherein the top surface of the first strip-shaped plate 1 is provided with a first strip-shaped groove 2, a second strip-shaped plate 3 is arranged in the first strip-shaped groove 2, the right ends of the front side and the rear side of the second strip-shaped plate 3 are respectively hinged with the right ends of the front side and the rear side of the first strip-shaped groove 2 through hinge columns, the middle part of the left side of the second strip-shaped plate 3 is provided with a blind hole 4, a movable rod 5 is arranged in the blind hole 4, the right end of the movable rod 5 is connected with the inner side wall of the blind hole 4 through a spring 6, the middle part of the inner wall of the left side of the first strip-shaped groove 2 is provided with a through hole 7, the left end of the movable rod 5 can be inserted into the through hole 7, the top surface of the second strip-shaped plate 3 is provided with a plurality, dynamometer 11 is located the left side of the slider 10 that corresponds respectively, dynamometer 11 passes through the fine rule with the slider 10 that corresponds respectively and is connected, both sides insert respectively corresponding bar spacing groove 9 and can follow it and slide around dynamometer 11, other fixed mounting stopper 12 is equallyd divide equally to both sides middle part around slider 10, stopper 12 inserts respectively corresponding bar spacing groove 9 and can follow it and slide, slider 10's bottom surface can respectively with the bottom surface inner wall contact cooperation of corresponding bar spout 8, second bar recess 13 is seted up on the bottom surface left side of second bar 3, be equipped with bar limiting plate 14 in the second bar recess 13, bar limiting plate 14's front and back both sides left end is connected through articulated post with the front and back both sides left end of second bar recess 13 respectively, several evenly distributed's spacing hole 15 is seted up on the bottom surface inner wall left side of first bar recess 2, bar limiting plate 14's right-hand member can insert in the spacing hole 15. When in use, the demonstration device of the utility model is horizontally placed on the ground, when in an initial state, the spring 6 is in a free state, the left end of the movable rod 5 is inserted into the through hole 7 at the moment, then the movable rod 5 is pressed, and then the movable rod 5 can move rightwards along the blind hole 4 and compress the spring 6, thereby the left end of the movable rod 5 can be separated from the through hole 7, at the moment, the left end of the second strip-shaped plate 3 can be lifted up, and then the second strip-shaped plate 3 can be turned upwards by taking the corresponding hinge point as the center, meanwhile, the strip-shaped limit plate 14 can be turned downwards by taking the corresponding hinge point as the center under the action of gravity, when the left end of the second strip-shaped plate 3 is turned upwards, the right end of the strip-shaped limit plate 14 can slide towards the left side along the inner wall of the bottom surface of the first strip-shaped groove 2, when the second strip-shaped plate 3 is adjusted to a proper inclination angle, the, thereby can support second bar board 3 through bar limiting plate 14 and live, then equally divide slider 10 and do not remove the right-hand member of the bar spout 8 that corresponds, pull dynamometer 11 again and remove to the left side, and then dynamometer 11 can slide to the left side along the bottom surface inner wall of the bar spout 8 that corresponds through the corresponding slider 10 of fine rule pulling respectively, can obtain corresponding frictional force numerical value through reading dynamometer 11's numerical value this moment. The utility model discloses a presentation device can support fast when using, need not to assemble before the use, can further shorten the preparation work before class, consequently the utility model discloses a presentation device can further avoid occuping student's classroom time when using, and then can further prolong student's study time, is favorable to further improving student's learning efficiency, and the utility model discloses a presentation device is the integral structure, does not have independent part, consequently can further avoid taking place the phenomenon that the part is lost, and portable more is more convenient when using, is fit for using widely. The slider 10 that corresponds and dynamometer 11's position can be injectd respectively to bar spacing groove 9, and then can further prevent that slider 10 and dynamometer 11 from taking place the skew, thereby can further improve the utility model discloses a stability of presentation device when using, it is more convenient when using.

Particularly, in order to further improve the precision of the demonstration apparatus of the present invention, the top surface of the second strip-shaped plate 3 is fixedly installed with the level gauge 16 on the left side. When using, the user can be with through spirit level 16 the utility model discloses a presentation device adjusts to the horizontality, and then can further reduce the utility model discloses an error of presentation device when using to can further improve the utility model discloses a presentation device's precision.

Specifically, in order to make the user remove the utility model discloses a during presentation device laborsaving, this embodiment the right side bottom of first strip shaped plate 1 both ends difference fixed mounting gyro wheel 17 around. When using, the user can with the utility model discloses a presentation device's left end lifts up, and then enables gyro wheel 17 and bottom surface contact, and then can remove through gyro wheel 17 the utility model discloses a presentation device to enable the user and removing the utility model discloses a it is more laborsaving during presentation device.

Furthermore, in order to be more convenient for the user to move the demonstration device of the present invention, the handle 18 is fixedly installed at the bottom of the left side of the first strip-shaped plate 1. Handle 18 can provide better application of force point for the user to it will to make the user can be through handle 18 the utility model discloses a presentation device's left end lifts up, and is more convenient when using.

Furthermore, in order to be convenient for the user to adjust the utility model discloses a presentation device's inclination, this embodiment the preceding right-hand member fixed mounting protractor of first bar shaped plate 1, the central point of protractor and the central line collineation of the pin joint of second bar shaped plate 3 and first bar shaped groove 2. When the angle gauge is used, a user can adjust the second strip-shaped plate 3 to a proper angle more easily through the angle gauge, so that the relation between the friction force and the gravity can be conveniently demonstrated, and the angle gauge is more efficient when in use.

Further, in order to make the demonstration device of the present invention more vivid, the present embodiment the inner wall of the bottom surface of the bar-shaped sliding groove 8 is paved with different materials respectively, i.e. the roughness of the inner wall of the bottom surface of the bar-shaped sliding groove 8 is different. Because the roughness of the bottom surface inner wall of the bar-shaped sliding groove 8 is different, the bottom surface inner wall of the bar-shaped sliding groove 8 has different friction coefficients respectively, and then the influence of the friction coefficients on the friction force can be observed more visually by a user, thereby enabling the utility model discloses a presentation device is more vivid.

Furthermore, as shown in the drawings, the sliding blocks 10 in this embodiment are all magnetic blocks, the top surfaces of the sliding blocks 10 can be provided with weight increasing blocks 19 communicated with each other by gravity, and the weight increasing blocks 19 can magnetically attract the sliding blocks 10. When the slide block is used, the weight increasing block 19 can be added to the slide block 10 at will, and then the pressure of the slide block 10 on the inner wall of the bottom surface of the strip-shaped slide groove 8 can be changed by adding the weight increasing block 19, so that the slide block is more convenient to use.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a frictional force presentation device for physical teaching convenient to accomodate and carry which characterized in that: comprises a first strip-shaped plate (1), a first strip-shaped groove (2) is formed in the top surface of the first strip-shaped plate (1), a second strip-shaped plate (3) is arranged in the first strip-shaped groove (2), the right ends of the front side and the rear side of the second strip-shaped plate (3) are respectively hinged with the right ends of the front side and the rear side of the first strip-shaped groove (2) through hinge columns, a blind hole (4) is formed in the middle of the left side of the second strip-shaped plate (3), a movable rod (5) is arranged in the blind hole (4), the right end of the movable rod (5) is connected with the inner side wall of the blind hole (4) through a spring (6), a through hole (7) is formed in the middle of the inner side wall of the left side of the first strip-shaped groove (2), the left end of the movable rod (5) can be inserted into the through hole (7), a plurality of strip-shaped chutes (8) which, the slide blocks (10) and the dynamometers (11) are arranged in the strip-shaped sliding chutes (8), the dynamometers (11) are respectively positioned on the left sides of the corresponding slide blocks (10), the dynamometers (11) are respectively connected with the corresponding slide blocks (10) through thin lines, the front sides and the rear sides of the dynamometers (11) are respectively inserted into the corresponding strip-shaped limiting grooves (9) and can slide along the same, the middle parts of the front sides and the rear sides of the slide blocks (10) are respectively and fixedly provided with limiting blocks (12), the limiting blocks (12) are respectively inserted into the corresponding strip-shaped limiting grooves (9) and can slide along the same, the bottom surfaces of the slide blocks (10) can be respectively contacted and matched with the inner walls of the bottom surfaces of the corresponding strip-shaped sliding chutes (8), the left sides of the bottom surfaces of the second strip-shaped plates (3) are provided with second strip-shaped grooves (13), strip-shaped limiting plates (14) are arranged in the second strip-shaped grooves (13), the left ends of, a plurality of limiting holes (15) which are uniformly distributed are formed in the left side of the inner wall of the bottom surface of the first strip-shaped groove (2), and the right end of the strip-shaped limiting plate (14) can be inserted into the limiting holes (15).

2. The physics teaching friction demonstration device convenient to store and carry of claim 1 wherein: and a level gauge (16) is fixedly arranged on the left side of the top surface of the second strip-shaped plate (3).

3. The physics teaching friction demonstration device convenient to store and carry of claim 1 wherein: the front end and the rear end of the bottom of the right side of the first strip-shaped plate (1) are respectively fixedly provided with a roller (17).

4. The physics teaching friction demonstration device convenient to store and carry of claim 1 wherein: a handle (18) is fixedly arranged at the bottom of the left side of the first strip-shaped plate (1).

5. The physics teaching friction demonstration device convenient to store and carry of claim 1 wherein: the right end in front of the first strip-shaped plate (1) is fixedly provided with a protractor, and the center point of the protractor is collinear with the center line of the hinge point of the second strip-shaped plate (3) and the first strip-shaped groove (2).

6. The physics teaching friction demonstration device convenient to store and carry of claim 1 wherein: different materials are paved on the inner wall of the bottom surface of the strip-shaped sliding groove (8) respectively, namely the roughness of the inner wall of the bottom surface of the strip-shaped sliding groove (8) is different.

7. The physics teaching friction demonstration device convenient to store and carry of claim 1 wherein: the sliding blocks (10) are all magnetic blocks, the top surfaces of the sliding blocks (10) can be provided with weight increasing blocks (19) communicated with each other by gravity, and the weight increasing blocks (19) can be magnetically attracted with the sliding blocks (10).