CN108766136B - Physics kinematics teaching presentation device - Google Patents

Abstract

The invention provides a physical kinematics teaching demonstration device, which includes inclined rails, vertical rails and straight rails. The angle of the inclined rails can be adjusted to achieve the purpose of demonstrating different accelerations, and the vertical rails and the straight rails maintain the vertical rail and straight rail states. , so the demonstration of flat throwing motion can be carried out, the straight rail can be erected to form a longer vertical rail with the vertical rail, and the display of free fall motion can be performed at this time; The rail is folded to the state parallel to the vertical rail to reduce the space occupation; the photoelectric gate body of the photoelectric gate assembly set on the inclined rail, the vertical rail and the straight rail can be popped up when in use, that is, the state of being perpendicular to the rail, after use After retracting, it is in the stored state, that is, in the state parallel to the track, which can better protect the photoelectric gate body, and the operation when the other two states are switched is also extremely convenient.

Description

A physical kinematics teaching demonstration device

【Technical field】

The invention relates to the technical field of teaching experimental equipment, in particular to a physical kinematics teaching demonstration device.

【Background technique】

In the process of physics teaching, in order to better understand the teaching content, the relevant theorems are usually demonstrated and verified in the form of physical experiments, so that learners can understand the nature of the physical theorems in a more intuitive way. Therefore, the present invention provides a physics Kinematics teaching demonstration device.

[Content of the invention]

In view of this, embodiments of the present invention provide a physical kinematics teaching demonstration device.

A physical kinematics teaching demonstration device, comprising a ramp, a vertical rail and a straight rail, the bottom of the front end of the ramp is provided with a retractable rod, and the bottom of the ramp is provided with a placement slot for accommodating the retractable rod , the placement slot is provided with a cover, the top of the vertical rail is fixed with a water platform, the water platform is rotatably connected with the rear end of the inclined rail, and the bottom end of the vertical rail and the front end of the straight rail are connected by connecting components , the rear end of the straight rail is provided with a stopper, and the connecting assembly includes a first socket piece, a second socket piece, a fixed shaft pin, a rotating shaft, a first limit piece and a second limit piece, so The first socket fitting is fixed on the front end of the straight rail, the second socket fitting is fixed on the bottom end of the vertical rail, the first socket fitting is sleeved on the second socket fitting, and the first socket fitting is connected to the second socket fitting. The two sockets are rotatably connected by a rotating shaft. The rotating shaft is provided with a rotating wing in the center. The inner wall of the second socket is provided with a first limiting piece and a second limiting piece on both sides of the rotating wing. The first limiting piece The positioning member and the second limiting member are arranged at right angles and are located on the rotation track of the rotating wing, wherein the first limiting member is arranged horizontally, and the second limiting member is arranged longitudinally;

The inclined rails, the vertical rails and the straight rails are all provided with photoelectric door assemblies, and the photoelectric door assemblies include at least two sets of photoelectric door bodies, locking assemblies and control assemblies arranged at intervals; the locking assemblies are fixed on the photoelectric door. At the bottom of the body, the locking assembly includes a locking piece and a first reset elastic member. The locking piece is provided with a pin hole in the center, and is rotatably matched with the pin shaft through the pin hole. The upper part is provided with a connection hole, the lock piece is provided with a lock head at one end away from the photoelectric door body, one end of the first reset elastic piece is connected with the connection hole, and the other end of the first reset elastic piece is connected with the first fixing pile; the control assembly Including a control button, a mounting piece, a driving piece and a lock, the end of the control button protrudes from the through hole provided on the outer wall of the ramp, the front end of the control button is fixedly connected with the mounting piece, and the driving piece is distributed on the mounting piece Corresponding to the position of the lock, the number of the driving parts is the same as the number of the photoelectric door body, the end of the driving part is an inclined plane, the front end of the lock is provided with a locking protrusion that cooperates with the lock head, and the lock is located at the top of the lock. The rear part of the lock projection is the place where the lock catch and the fixed shaft are rotated together. The end of the lock catch is the inclined plane and the front end of the driving piece is in contact with the inclined plane. The middle part of the lock catch is provided with a second reset elastic piece. The other end is connected with the second fixed pile;

The inclined rails, vertical rails and straight rails are also provided with rails and scales, and the scales are located on both sides of the corresponding rails and are arranged in parallel with each rail.

As a preferred embodiment of the present application, the inclined rail is further provided with an angle sensor, and the angle sensor is provided on the side wall of the front end of the inclined rail.

As a preferred embodiment of the present application, the first restoring elastic member and the second restoring elastic member are both springs.

A technical scheme in the above-mentioned technical scheme has the following beneficial effects:

The invention provides a physical kinematics teaching demonstration device, which includes inclined rails, vertical rails and straight rails. The angle of the inclined rails can be adjusted to achieve the purpose of demonstrating different accelerations, and the vertical rails and the straight rails maintain the vertical rail and straight rail states. , so the demonstration of flat throwing motion can be carried out, the straight rail can be erected to form a longer vertical rail with the vertical rail, and the display of free fall motion can be performed at this time; The rail is folded to the state parallel to the vertical rail to reduce the space occupation; the photoelectric gate body of the photoelectric gate assembly set on the inclined rail, the vertical rail and the straight rail can be popped up when in use, that is, the state of being perpendicular to the rail, after use After retracting, it is in the stored state, that is, in the state parallel to the track, which can better protect the photoelectric gate body, and the operation when the other two states are switched is also extremely convenient.

【Description of drawings】

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a physical kinematics teaching demonstration device according to an embodiment of the present invention;

Fig. 2 is the structural representation of the straight rail of the embodiment of the present invention;

Fig. 3 is the structural representation of the straight rail of the embodiment of the present invention;

4 is a schematic structural diagram of a connection assembly according to an embodiment of the present invention;

5 is a schematic structural diagram of a photogate assembly according to an embodiment of the present invention;

Fig. 6 is the structural representation of the mounting member;

7 is a schematic structural diagram of a physical kinematics teaching demonstration device in a storage state according to an embodiment of the present invention.

【Detailed ways】

In order to better understand the technical solutions of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

It should be understood that the term "and/or" used in this document is only an association relationship to describe the associated objects, indicating that there may be three kinds of relationships, for example, A and/or B, which may indicate that A exists alone, and A and B exist at the same time. B, there are three cases of B alone. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

1 is a schematic structural diagram of a physical kinematics teaching demonstration device according to an embodiment of the present invention; FIG. 2 is a structural schematic diagram of a straight rail according to an embodiment of the present invention; FIG. 3 is a structural schematic diagram of a straight rail according to an embodiment of the present invention; Schematic diagram of the structure of the connecting assembly of the embodiment; FIG. 5 is a schematic diagram of the structure of the photogate assembly of the embodiment of the present invention; FIG. 6 is a schematic diagram of the structure of the mounting part; Schematic diagram of the structure of the device.

As shown in Figures 1-7, a physical kinematics teaching demonstration device includes inclined rails 100, vertical rails 200 and straight rails 300. The bottom of the front end of the inclined rail 100 is provided with a retractable rod 1, and the bottom of the inclined rail 100 is provided with a retractable rod 1. There is a placement slot 2 for accommodating the retractable rod 1, the placement slot 2 is provided with a cover, the top of the vertical rail 200 is fixed with a water platform 3, the water platform 3 is rotatably connected with the rear end of the inclined rail 100, and the bottom end of the vertical rail 200 is The front end of the straight rail 300 is connected with the connecting assembly 4 , the rear end of the straight rail 300 is provided with a stopper 301 , and the connecting assembly 4 includes a first socket 41 , a second socket 42 , a fixed shaft pin 43 , and a rotating shaft 44 , the first limiting piece 45 and the second limiting piece 46, the first socket piece 41 is fixed on the front end of the straight rail 300, the second socket piece 42 is fixed on the bottom end of the vertical rail 200, the first socket piece 41 It is sleeved on the second sleeve 42, the first sleeve 41 and the second sleeve 42 are rotatably connected by a rotating shaft 44, and the rotating shaft 44 is provided with a rotating wing 441 in the center. The inner wall of the second sleeve 42 A first limiting member 45 and a second limiting member 46 are provided on both sides of the rotating wing 441 . The first limiting member 45 and the second limiting member 46 are arranged at a right angle and are located on the rotation track of the rotating wing 441 . , wherein the first limiting member 45 is arranged laterally, and the second limiting member 46 is arranged longitudinally. Because the inclined rail 100 is further provided with an angle sensor 9, the angle sensor is arranged on the side wall of the front end of the inclined rail, and the angle between the inclined rail and the horizontal plane can be read in real time through the angle sensor. Therefore, the present invention can achieve the purpose of demonstrating different accelerations.

The inclined rail 100, the vertical rail 200 and the straight rail 300 are all provided with a photoelectric door assembly 5. The photoelectric door assembly 5 includes at least two sets of photoelectric door bodies 51, locking assemblies 52 and control assemblies 53 arranged at intervals; the locking assemblies 52 are fixed At the bottom of the photoelectric door body 51, the locking assembly 52 includes a locking piece 521 and a first reset elastic member 522. The locking piece 521 is provided with a pin hole in the center, and is rotatably matched with the pin shaft through the pin hole. The locking piece 521 is close to the photoelectric door. The upper part of one end of the main body 51 is provided with a connection hole 523, the lock piece 521 is provided with a lock head 524 at one end away from the photogate body 51, one end of the first reset elastic member 522 is connected with the connection hole 523, and the other end of the first reset elastic member 522 Connected with the first fixing pile 10; the control assembly 53 includes a control button 531, a mounting member 532, a driving member 533 and a lock 534. The front end of the LED is fixedly connected with the mounting member 532. The driving members 533 are distributed on the mounting member 532 and correspond to the positions of the locks 534. The number of the driving members 533 is the same as that of the photogate body 51. The end of the driving member 533 is an inclined plane. The front end of the lock catch 534 is provided with a lock protrusion 5341 that cooperates with the lock head 524. The lock catch 534 is located at the rear of the lock protrusion 5341, where the lock catch 534 and the fixed shaft are rotated. The front end of the piece 533 is in oblique butt, the middle of the lock 534 is provided with a second reset elastic piece 5342, the other end of the second reset elastic piece 5342 is connected with the second fixing pile 30, the first reset elastic piece 522 and the second reset elastic piece 5342 are all springs.

It should be noted that, as a high-precision speed measuring instrument, the photoelectric gate assembly is generally fixed perpendicular to the track and higher than the plane where the track is located. breakage, etc. In the technical solution of the present application, the photoelectric gate can be controlled to bounce to the use state perpendicular to the track during the experiment, and the photogate can be controlled to return to the storage state parallel to the track at the end of the experiment. Due to the protective effect of the track, it is also It makes the photogate not easy to be damaged by external force.

Specifically, the photoelectric door body can be rotated around the pin shaft through the locking assembly, and the power for the rotation is provided by the first reset elastic member. When the photoelectric door assembly is in the storage state, the control button is in a non-depressed state, and the control button is connected to the control button. The connecting piece and the driving piece on the connecting piece are both in a non-pressing state at the same time, then the lock head and the locking protrusion on the lock catch are in a locked state, and the first reset elastic piece is in a compressed state; when the experimental system needs to be used When the control button is pressed down to make it in the down-pressed state, the connecting piece and the driving element on the connecting piece are both in the down-pressing state at the same time. When the fixed shaft rotates, the lock will rotate under the combined action of the second reset elastic member and the driving member. The second reset elastic member is arranged at the position close to the end of the lock, so the end of the lock will rotate upward with the direction of the pulling force. Correspondingly, the locking protrusion of the lock is rotated downward to release the locked state. After the lock head is unlocked, the locking piece can be rotated under the action of the first reset elastic member. Due to the rotation limit block 6 and the length of the first reset elastic member When the photoelectric door rotates to the use state perpendicular to the track, it stops rotating. The direction of rotation of the locking piece and the direction of rotation of the lock are opposite, which can keep the photoelectric door assembly in the use state. The rotation limit block 6 is set in the sub On the inner wall of the guide rail and at the same time the block is located in the direction of rotation of the latch. Similarly, if you want to restore the photogate from the use state to the storage state, the control button is in the depressed state, manually rotate the photoelectric door body to the position parallel to the track, and then restore the control button to the non-depressed state, then the lock It is in a locked state with the locking protrusion on the lock, so that the photoelectric door assembly can be maintained in a stowed state.

The end of the control button is provided with an anti-dropping piece, and the through hole on the outer wall of the sub-guide rail also has the function of limiting the position. The shape of the through hole is a "dumbbell shape" with round ends and a rectangle in the middle. Width, the anti-falling part of the control button is circular and the diameter is larger than the diameter of the current circle. When the control button can pass through the rectangle, and the control button is in the two circles, it is in a depressed state and a non-depressed state, respectively. The rectangle can play a limiting role. It is necessary to manually move the control button out of the circle, and then enter another circle after passing through the rectangle, so as to realize the switch between the depressed state and the non-depressed state.

The inclined rails 100 , the vertical rails 200 and the straight rails 300 are also provided with rails 7 and scales 8 .

The technical scheme of the embodiment of the present invention has the following beneficial effects:

The invention provides a physical kinematics teaching demonstration device, which includes inclined rails, vertical rails and straight rails. The angle of the inclined rails can be adjusted to achieve the purpose of demonstrating different accelerations, and the vertical rails and the straight rails maintain the vertical rail and straight rail states. , so the demonstration of flat throwing motion can be carried out, the straight rail can be erected to form a longer vertical rail with the vertical rail, and the display of free fall motion can be performed at this time; The rail is folded to the state parallel to the vertical rail to reduce the space occupation; the photoelectric gate body of the photoelectric gate assembly set on the inclined rail, the vertical rail and the straight rail can be popped up when in use, that is, the state of being perpendicular to the rail, after use After retracting, it is in the stored state, that is, in the state parallel to the track, which can better protect the photoelectric gate body, and the operation when the other two states are switched is also extremely convenient.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (3)

1. A physical kinematics teaching demonstration device is characterized by comprising an inclined rail, a vertical rail and a straight rail, wherein a telescopic rod is arranged at the bottom of the front end of the inclined rail, a placing groove for accommodating the telescopic rod is arranged at the bottom of the inclined rail, a sealing cover is arranged on the placing groove, a horizontal table is fixed at the top end of the vertical rail, the horizontal table is rotatably connected with the rear end of the inclined rail, the bottom end of the vertical rail is connected with the front end of the straight rail through a connecting assembly, a stop block is arranged at the rear end of the straight rail, the connecting assembly comprises a first sleeving piece, a second sleeving piece, a fixed shaft pin, a rotating shaft, a first limiting piece and a second limiting piece, the first sleeving piece is fixed at the front end of the straight rail, the second sleeving piece is fixed at the bottom end of the vertical rail, the first sleeving piece is sleeved on the second sleeving piece, the first sleeving piece and the second sleeving piece are rotatably connected through the rotating shaft, and a, the inner wall of the second sleeving piece is provided with a first limiting piece and a second limiting piece which are positioned at two sides of the rotating wing, the first limiting piece and the second limiting piece are arranged at a right angle and positioned on the rotating track of the rotating wing, wherein the first limiting piece is transversely arranged, and the second limiting piece is longitudinally arranged;

the inclined rail, the vertical rail and the straight rail are all provided with photoelectric door components, and each photoelectric door component comprises at least two groups of photoelectric door bodies, locking components and control components which are arranged at intervals; the locking assembly is fixed at the bottom of the photoelectric door body and comprises a locking plate and a first reset elastic piece, a pin hole is formed in the middle of the locking plate and is in rotating fit with the pin shaft through the pin hole, a connecting hole is formed in the upper portion, close to one end of the photoelectric door body, of the locking plate, a lock head is arranged at one end, far away from the photoelectric door body, of the locking plate, one end of the first reset elastic piece is connected with the connecting hole, and the other end of the first reset elastic piece is connected with the first fixing pile; the control assembly comprises a control button, an installation part, a driving part and a lock catch, the tail end of the control button extends out of a through hole formed in the outer wall of the inclined rail, the front end of the control button is fixedly connected with the installation part, the driving part is distributed on the installation part and corresponds to the position of the lock catch, the number of the driving part is the same as that of the photoelectric door body, the tail end of the driving part is an inclined plane, a lock boss matched with the lock head is arranged at the front end of the lock catch, the lock catch is positioned at the rear part of the lock boss and is a rotating matching part of the lock catch and the fixed shaft, the tail end of the lock catch is an inclined plane and is in butt joint with the inclined plane at the front end of the driving part, a second reset elastic part is;

the inclined rail, the vertical rail and the straight rail are respectively provided with a track and a scale, and the scales are positioned on two sides corresponding to the tracks and are arranged in parallel corresponding to the tracks.

2. The physical kinematics teaching demonstration device according to claim 1 wherein the ramp is further provided with an angle sensor, said angle sensor being provided on a side wall of the front end of the ramp.

3. The physical kinematics teaching demonstration device according to claim 2 wherein the first and second return springs are springs.

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