CN208580529U - A kind of multi-faceted pole change demonstration teaching aid - Google Patents

Abstract

The utility model relates to a kind of teaching aids of physics demonstrating, more particularly to a kind of multi-faceted pole change demonstration teaching aid, it is characterized by: interior of shell is equipped with the lower half portion of the lower half portion of ammeter, electromagnet, slide rheostat, switch, electromagnet is equipped with coil and electromagnetism iron slider, and slide rheostat is equipped with slide rheostat sliding block；Battery is connected by conducting wire with the ammeter of interior of shell, switch and slide rheostat；There are multi-faceted pole change display device and magnetic field displaying case etc..The utility model is compared with prior art: comprehensive, solid show different direction by the rotary needle of magnetic influence rotation situation, inner equipment connected by conducting wire, it need not test and all reconnect every time, easy to operate, observation experiment result is quick, intuitive, electric wire layout is clear, easy to carry does not take up space.

Description

A kind of multi-faceted pole change demonstration teaching aid

Technical field

The utility model relates to a kind of teaching aids of physics demonstrating, and in particular to a kind of electromagnet generation indicators turn demonstration religion Tool.

Background technique

The principle of electromagnet has been applied primarily to the magnetic effect of electric current, and the magnetic effect of electromagnetism is by scientist's oersted at first It was found that, life or the equipment of production application to electromagnet have: electric bell, air switch, electromagnetic lifter, telephone receiver, automatically Water level alarm etc..Physics lesson can use electromagnet teaching aid when the principle for saying electromagnet to be tested, but have at present Related experiment demonstration teaching aid, experiment will reconnect an equipment every time, reduce conventional efficient, increase the negative of teacher Load, and inconvenient for operation, observation result is not quick, can not mobilizing students well learning interest.

CN201620335450.0 discloses a kind of multifunction electromagnetic iron demonstrator, passes through baffle 5 for glass bottom 1 atmosphere operating space of plate and demonstration area, baffle 5 are bonded into battery grooves 4, and the battery grooves 4 are A, B, C respectively, but it exists Two problems.First, the barrier of baffle is unfavorable for the observation that student connects electric wire, and (it should be back cabling, front cabling If, in baffle top electric wire around come around going to seem disorderly and unsystematic)；Second since in classroom, demonstration is all usually towards classroom All directions and CN201620335450.0 simply facilitates Vertical Observation, be unfavorable for solid show, such as its horizontal pointer, with gear The all parts that plate is placed；Third, when without demonstration, demonstrator, which is easy to be damaged, falls ash, and the setting of its baffle is not easy to increase Covering.4th, it is most important that it can not show that different direction receives the rotation situation of the rotary needle of magnetic influence.

Utility model content

The purpose of this utility model is to solve the above problems, and now provides a kind of comprehensive displaying different direction by magnetic influence The rotation situation of rotary needle, inner equipment connected by conducting wire, it is not necessary to experiment all reconnects every time, operation letter Single, observation experiment result is quick, electric wire is laid out clearly multi-faceted pole change demonstration teaching aid.

To achieve the above object, the technical solution of the utility model is:

A kind of multi-faceted pole change demonstration teaching aid, it is characterised in that: including shell (8), the external needle dial of shell (8) (5), battery (14), electromagnetism iron slider (3), slide rheostat sliding block (9), the top half for switching (11), ammeter (13) Top half, slideway one (15) and slideway two (16)；The switch (11) and ammeter (13) on shell (8) by being arranged Windowing expose；Internal ammeter (13) lower half portion of shell (8) is connected by conducting wire (12) with electromagnet (1), electromagnet (1) it is connected by conducting wire (12) with slide rheostat (10), slide rheostat (10) passes through conducting wire (12) and switch (11) lower half Part is connected；Electromagnet (1) is equipped with coil (2) and electromagnetism iron slider (3), and slide rheostat (10) is equipped with sliding variable resistance Device sliding block (9)；Multi-faceted pole change display device and magnetic field displaying case (28), the multi-faceted magnetic pole are equipped on shell (8) Change display device by two bottom end plates (17), two spring hinges (18), two vertical rods (19) and two horizon bar (20) structures At two bottom end plates (17) are fixed on shell (8) upper surface in parallel, and each bottom end plate (17) is adopted respectively with respective vertical rod (19) It is connected with spring hinge (18), each vertical rod (19) is respectively adopted folding rod with respective horizon bar (20) and connect, horizon bar (20) magnet frame plate (21), upper end support (22) and lower end support (23), swingle (24) upper and lower ends are equipped with to be respectively set In upper end support (22) and lower end support (23), rotary needle (25) is vertically fixed on swingle (24)；The needle dial (5) Setting is intermediate at two bottom end plate (17) intervals.

Further, shell (8) is equipped with multiple jacks (29), and inserting column (26) plug is in jack (29), inserting column (26) different height is equipped with hole, and U-shaped is pitched in the track groove (281) of (27) one end insertion magnetic field displaying case (28), U-shaped fork The other end is inserted into the hole of inserting column (26).

Further, iron powder by being closed the cuboid structure of non magnetic transparent material therein by the magnetic field displaying case (28) At.

Further, upper end support (22) and lower end support (23) are respectively fixedly disposed on two horizon bars (20), on End support (22) is made of the first connecting plate (221) and the positioning ring (222) being bonded on the first connecting plate (221), lower end branch Seat (23) is made of the second connecting plate (231) and the funnel positioning seat (232) being bonded on the second connecting plate (231), swingle (24) upper end passes through positioning ring (222), and the setting of swingle (24) lower end is in funnel positioning seat (232).

Further, it is set on each horizon bar (20) there are two magnet frame plate, 4 magnet frame plates are centrosymmetric arrangement.

Further, funnel positioning seat (232) and positioning ring (222) are coaxial.

Further, the electromagnetism iron slider (3) is located in slideway one (15), and slide rheostat sliding block (9) is located at slideway In two (16).

Further, the battery (14) passes through conducting wire (12) and shell (8) internal ammeter (13) and switch (11) it is connected, battery (14) can remove the direction of adjustment positive and negative anodes connection.

The utility model has the beneficial effects that

1. compared with prior art, the utility model increases multi-faceted pole change display device, different direction, difference The displaying of influence of the magnet of number to the direction of rotary needle, angle, speed, and magnetic pole display device can according to need expansion or It packs up, it is easy to carry to be not take up excessive space；

2. the utility model, which increases magnetic field displaying case, can be arranged in different direction, pole change exhibition can be sensed respectively The Distribution of Magnetic Field for showing Distribution of Magnetic Field and electromagnet in device, enables pole change more intuitively to show.

3. shell increases the protection on each component and do not influence the observation to indicators turn, winning shell then can be clearly Find out the circuit connection of each component.Electromagnetism benefit is shown in shell, is removed shell and is shown internal cabling.

4. the utility model inner equipment is connected by conducting wire, it is not necessary to which experiment all reconnects every time, increases reality Efficiency is tested, and observation experiment result is convenient and efficient, increases the accuracy of experiment and the convincingness of experiment.

5. the utility model is easy to operate, only need to slide electromagnetism iron slider and slide rheostat sliding block can change initially Condition is tested, and is capable of the learning interest of mobilizing students well, is improved the quality of instruction of teacher.

Detailed description of the invention

Fig. 1 is the utility model internal structure chart；

Fig. 2 is the utility model external structure expanded view；

Fig. 3 is the utility model external structure folding picture；

Fig. 4 is the utility model rotary needle and upper and lower side support enlarged drawing；

Fig. 5 is the enlarged drawing of magnetic field displaying case；

Fig. 6 is the utility model circuit diagram；

Wherein, 1: electromagnet, 2: coil, 3: electromagnetism iron slider, 4: pointer, 5: needle dial, 6: rotation axis, 7: small magnetic patch, 8: shell, 9: slide rheostat sliding block, 10: slide rheostat, 11: switch, 12: conducting wire, 13: ammeter, 14: battery, 15: slideway one, 16: slideway two, 17: bottom end plate, 18: spring hinge, 19: vertical rod, 20: horizon bar, 21: magnet frame plate, 22: Upper end support, 221: the first connecting plates, 222: positioning ring, 23: lower end support, 231: the second connecting plates, 232: funnel positioning seat, 24: swingle, 25: rotary needle, 26: inserting column, 27:U shape fork, 28: magnetic field displaying case, 281: track groove, 29: jack.

Specific embodiment

Now in conjunction with attached drawing 1-6, the structure and use of the utility model are further described: as shown in Figure 1-3, include outer Shell (8), the external needle dial (5) of shell (8), battery (14), electromagnetism iron slider (3), slide rheostat sliding block (9), switch (11) top half, slideway one (15) and the slideway two (16) of top half, ammeter (13)；Switch (11) and the electric current Table (13) is exposed by the windowing being arranged on shell (8)；Internal ammeter (13) lower half portion of shell (8) passes through conducting wire (12) it is connected with electromagnet (1), electromagnet (1) is connected by conducting wire (12) with slide rheostat (10), slide rheostat (10) It is connected by conducting wire (12) with switch (11) lower half portion；Electromagnet (1) is equipped with coil (2) and electromagnetism iron slider (3), sliding Rheostat (10) is equipped with slide rheostat sliding block (9)；Multi-faceted pole change display device and magnetic field are equipped on shell (8) Displaying case (28), the multi-faceted pole change display device by two bottom end plates (17), two spring hinges (18), two it is vertical Bar (19) and two horizon bars (20) are constituted, and two bottom end plates (17) are fixed on shell (8) upper surface, each bottom end plate in parallel (17) spring hinge (18) is respectively adopted with respective vertical rod (19) to connect, each vertical rod (19) and respective horizon bar (20) Folding rod connection is respectively adopted, horizon bar (20) is equipped with magnet frame plate (21), upper end support (22) and lower end support (23), rotation Bull stick (24) upper and lower ends are separately positioned in upper end support (22) and lower end support (23), and rotary needle (25) is vertically fixed on rotation On bull stick (24)；Needle dial (5) setting is intermediate in two bottom end plates (17).Upper end support (22) and lower end support (23) It is respectively fixedly disposed on two horizon bars (20), positioning of the upper end support (22) by the first connecting plate (221) and bonding thereon Ring (222) composition, lower end support (23) are made of the funnel positioning seat (232) of the second connecting plate (231) and bonding thereon, are rotated Bar (24) upper end passes through positioning ring (222), and the setting of swingle (24) lower end is in funnel positioning seat (232).

It is set on each horizon bar (20) there are two magnet frame plate, 4 magnet frame plates are centrosymmetric arrangement.On shell (8) Equipped with multiple jacks (29), in jack (29), inserting column (26) different height is equipped with hole for inserting column (26) plug.It is described Electromagnetism iron slider (3) is located in slideway one (15), and slide rheostat sliding block (9) is located in slideway two (16).

Shell 8 to be provided with sky window on the position of inductive switch 11 and ammeter 13 so that switch and ammeter on partially expose (windowing is not shown in Fig. 2-3, and windowing shape is rectangle or circle), needle dial 5 opens up sky window as needed, and Fig. 2-3 is needle dial The case where windowing, when needle dial does not open a window on the shell, needle dial 5 is fixed on shell 8, and needle dial (5) setting exists Two parallel bottom end plate (17) intervals are intermediate.

This teaching aid, which is used to demonstrate after electromagnet is powered, to be magnetic, when one timing of coil turn, is got over by the electric current of electromagnet Greatly, electromagnetism ferromagnetism it is stronger, when the number of turns of one timing electromagnet coil of electric current it is more, magnetic stronger, the throw of pointer of electromagnet Angle it is bigger；14 anode of battery is connected by conducting wire 12 with ammeter 13, cathode is connected by conducting wire 12 with switch 11, Closure switch 11, electromagnet 1 attracts small magnetic patch 7 at this time, and small magnetic patch 7 is close to electromagnet 1, and small magnetic patch 7 drives pointer 4 around rotation Axis 6 rotates clockwise on needle dial 5；14 positive and negative anodes of battery are adjusted, 14 anode of battery is passed through into conducting wire 12 and switch 11 It is connected, cathode is connected by conducting wire 12 with ammeter 13, closure switch 11, and electromagnet 1 repels small magnetic patch 7 at this time, and small magnetic patch 7 is remote From electromagnet 1, small magnetic patch 7 drives pointer 4 to rotate counterclockwise on needle dial 5 around rotation axis 6.

Closure switch 11 keep electromagnetism iron slider 3 motionless, slide slide rheostat sliding block 9 on slideway 2 16, can Change the size of the resistance of slide rheostat 10, the i.e. size of electric current in change circuit；When 2 the number of turns of coil on electromagnet 1 When constant, the resistance of slide rheostat 10 is smaller, i.e., when the electric current in circuit is bigger, the amplitude that pointer 4 rotates is bigger, illustrates electricity The magnetism of magnet 1 is stronger, can obtain: one timing of electromagnet coil the number of turns, electric current is bigger, and the magnetism of electromagnet is stronger.

Closure switch 11 can change 1 coil of electromagnet, 2 circle by sliding electromagnetism iron slider 3 on slideway 1 Several sizes makes the numerical value of ammeter 13 by adjusting the size of 10 resistance of slide rheostat while changing 2 the number of turns of coil It remains unchanged, i.e., electric current remains unchanged in circuit；When size of current is constant in circuit, the number of turns of the coil 2 on electromagnet 1 is got over More, the amplitude that pointer 4 rotates is bigger, illustrates the magnetic enhancement of electromagnet 1, can obtain: one timing of electric current, electromagnet coil in circuit The number of turns is bigger, and the magnetism of electromagnet is stronger.There are electric wire access slot or seams as needed near battery for shell 8 (in figure not It shows).

As Figure 2-3, jack (29) is arranged around track one (15), and inserting column (26) can vertically be plugged on jack (29) in, band hole on inserting column (26), when not in use, inserting column (26), which can be pulled up, to be packed up.Bottom end plate (17) is mechanical solid Determine or be bonded on shell (8) outer surface, spring hinge, vertical rod (19) and water are used between bottom end plate (17) and vertical rod (19) It is connected between flat bar (20) using folding rod mode, is provided on horizon bar (20) magnet frame plate (21), there is two sets of bottom ends in Fig. 2-3 Plate (17), spring hinge (18), vertical rod (19) and horizon bar (20) are to form pole change display device, according to need on horizon bar Setting magnet grillage (21) is bonded, 4 are provided in Fig. 2-3, Fig. 2 is the figure of magnetic pole display device expansion, and Fig. 3 is magnetic pole displaying The figure that device collapses.

As shown in figure 4, upper end support (22) has short L-shaped first connecting plate (221), the first connecting plate (221) one end It is bonded on one of horizon bar (20), the first connecting plate (221) other end is bonded with positioning ring, and lower end support (23) has Long L-shaped second connecting plate (231), the second connecting plate (231) one end are bonded on second horizon bar (20), the second connecting plate The other end bonds funnel positioning seat, and the swingle (24) of non-magnetic material (such as plastics or wooden) is bonded with the rotary needle of irony (25), swingle (24) upper end passes through positioning ring (222) (plastic hoop can be used), and the setting of swingle (24) lower end is positioned in funnel In seat (232) (small funnel made of small mud cup or plastics can be used), funnel positioning seat (232) can also use intermediate drilling blind hole Pattern with position rotating bar.It is set on each horizon bar (20) there are two magnet frame plate, magnet frame plate is centrosymmetric arrangement.The The centre of two magnet frame plates on horizon bar is arranged in one connecting plate (221), and the second connecting plate (231) setting is in another level The centre of two magnet frame plates on bar, as shown in Figure 2.Funnel positioning seat (232) and positioning ring (222) are coaxial.

As shown in figure 5, magnetic field displaying case is sealed iron powder by transparent thin plastic or thin glass material (iron powder is not shown in Fig. 5) Composition, such as CN205649116U are closed, but track groove need to be opened in its box body two sides；Magnetic field displaying case both sides of the face are provided with track groove (281), the end of U-shaped fork (27) can penetrate inserting column in the inside and outside plug of track groove (281), the bar of U-shaped fork (27) tail portion (26) hole, and with nut check, such as the nut of U-shaped fork (27) tail end in Fig. 2.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, the utility model can have various known changes and variation.All principles in the utility model Within spirit, made any equivalent replacement, modification, improvement etc., should be included in the protection scope of the utility model it It is interior.

Claims (8)

1. a kind of multi-faceted pole change demonstration teaching aid, it is characterised in that: including shell (8), the external needle dial of shell (8) (5), battery (14), electromagnetism iron slider (3), slide rheostat sliding block (9), the top half for switching (11), ammeter (13) Top half, slideway one (15) and slideway two (16)；The switch (11) and ammeter (13) pass through to be arranged on shell (8) Windowing is exposed；Internal ammeter (13) lower half portion of shell (8) is connected by conducting wire (12) with electromagnet (1), electromagnet (1) It is connected by conducting wire (12) with slide rheostat (10), slide rheostat (10) passes through conducting wire (12) and switch (11) lower half portion It is connected；Electromagnet (1) is equipped with coil (2) and electromagnetism iron slider (3), and slide rheostat (10) is equipped with slide rheostat sliding block (9)；Multi-faceted pole change display device and magnetic field displaying case (28), the multi-faceted pole change exhibition are equipped on shell (8) Show that device is made of two bottom end plates (17), two spring hinges (18), two vertical rods (19) and two horizon bars (20), two Bottom end plate (17) is fixed on shell (8) upper surface in parallel, and spring is respectively adopted in each bottom end plate (17) and respective vertical rod (19) Hinge (18) connection, each vertical rod (19) are respectively adopted folding rod with respective horizon bar (20) and connect, and horizon bar is set on (20) There are magnet frame plate (21), upper end support (22) and lower end support (23), swingle (24) upper and lower ends are separately positioned on upper end branch In seat (22) and lower end support (23), rotary needle (25) is vertically fixed on swingle (24)；The needle dial (5) is arranged two A bottom end plate (17) interval is intermediate.

2. a kind of multi-faceted pole change demonstration teaching aid according to claim 1, it is characterised in that: shell (8) is equipped with Multiple jacks (29), in jack (29), inserting column (26) different height is equipped with hole, U-shaped fork for inserting column (26) plug (27) in the track groove (281) of one end insertion magnetic field displaying case (28), U-shaped is pitched in the hole of other end insertion inserting column (26).

3. a kind of multi-faceted pole change demonstration teaching aid according to claim 2, it is characterised in that: the magnetic field displaying case (28) it is made of the cuboid that iron powder is closed non magnetic transparent material therein.

4. a kind of multi-faceted pole change demonstration teaching aid according to claim 1, it is characterised in that: upper end support (22) and Lower end support (23) is respectively fixedly disposed on two horizon bars (20), and upper end support (22) is by the first connecting plate (221) and glues Positioning ring (222) composition of knot thereon, funnel positioning seat of the lower end support (23) by the second connecting plate (231) and bonding thereon (232) it forms, swingle (24) upper end passes through positioning ring (222), and swingle (24) lower end is arranged in funnel positioning seat (232) It is interior.

5. a kind of multi-faceted pole change demonstration teaching aid according to claim 1, it is characterised in that: each horizon bar (20) On set there are two magnet frame plate, 4 magnet frame plates are centrosymmetric arrangement.

6. a kind of multi-faceted pole change demonstration teaching aid according to claim 4, it is characterised in that: funnel positioning seat (232) and positioning ring (222) is coaxial.

7. a kind of multi-faceted pole change demonstration teaching aid according to claim 1, it is characterised in that: the electromagnetism iron slider (3) it is located in slideway one (15), slide rheostat sliding block (9) is located in slideway two (16).

8. a kind of multi-faceted pole change demonstration teaching aid according to claim 1, it is characterised in that: the battery (14) It is connected by conducting wire (12) ammeter (13) internal with shell (8) and switch (11), battery (14) can remove adjustment just The direction of cathode connection.