CN215814716U

CN215814716U - Physical DC circuit experiment box

Info

Publication number: CN215814716U
Application number: CN202121079913.9U
Authority: CN
Inventors: 李庆林
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-02-11
Anticipated expiration: 2031-05-19

Abstract

The application discloses physics dc circuit experimental box, including base and buffering vibration damper, positioner and angle adjusting device, buffering vibration damper includes the supporting leg, the guide way, first spring, the movable block, the connecting rod, buffer spring, the buffing pad, the connecting block, inhale shake rubber slab, the connecting rod, the fixing base, the handle, side channel and second spring, the guide way has all been opened to the top both sides of base, the inside sliding connection movable block of guide way, the equal fixed connection fixing base in top both sides of base. Through rotating the crank, the crank drives the screw rod and rotates inside the spread groove, thereby the screw rod rotates with ejector pad screw thread and promotes the ejector pad and slide along the spread groove, the ejector pad drives the guide block and removes, thereby the ejector pad with the inclined plane contact of swash plate with swash plate jack-up, the swash plate drives the body and passes through the rotation axis and rotate certain angle to the show angle of convenient adjustment experiment facilitates the use.

Description

Physical DC circuit experiment box

Technical Field

The application relates to the field of physical experiment equipment, in particular to a physical direct current circuit experiment box.

Background

The skill training of physics direct current experiment is the important constitution of college physical experiment teaching, and generally needs the physics laboratory to examine the case in the college physical experiment class, and at present, the integration has a plurality of electronic component in the physics experiment case, like switch, the resistance of a plurality of different resistance, power size adjust knob etc. and a plurality of electronic component's next door all has respective jack.

Its shock resistance of current direct current circuit experimental box is poor, can not protect the electronic component who integrates in the box well to lead to life weak point, and current direct current circuit experimental box when teaching, the show angle of inconvenient adjustment direct current circuit experimental box, thereby influence the teaching effect. Therefore, a physical dc circuit experimental box is proposed to solve the above problems.

Disclosure of Invention

The utility model provides a physics dc circuit experimental box is used for solving its shock resistance of current dc circuit experimental box poor in this embodiment, can not protect integrated electronic component in the box well to lead to life to be short, and current dc circuit experimental box when teaching, the show angle of inconvenient adjustment dc circuit experimental box, thereby influence the problem of teaching effect.

According to one aspect of the application, a physical direct current circuit experiment box is provided, which comprises a base, a buffering vibration damping device, a positioning device and an angle adjusting device;

the damping device comprises a supporting leg, a guide groove, a first spring, a movable block, a connecting rod, a buffer spring, a buffer seat, a connecting block, a damping rubber plate, a connecting rod, a fixed seat, a handle, a side groove and a second spring, wherein the guide groove is formed in each of two sides of the top of the base, the movable block is connected in the guide groove in a sliding mode, and the fixed seat is fixedly connected to each of two sides of the top end of the base;

the positioning device comprises a pressure plate, a buffer cavity, a body, a protective shell, a movable cover, a connecting seat, a positioning groove, a positioning plate and a limiting plate, wherein the connecting seat is fixedly connected to the top end of the fixed seat, the positioning groove is formed in the top of the connecting seat, and the protective shell is slidably connected to the center of the interior of the fixed seat;

the angle adjusting device comprises a crank, a fixing plate, a screw, a push block, a guide block, an inclined plate, a rotating shaft and a connecting groove, the inside of the protective shell is provided with a body, the top end fixed connection fixing plate of the shock-absorbing rubber plate is arranged, the connecting groove is formed in the inside of the fixing plate, and the push block is connected with the inside of the connecting groove in a sliding mode.

Further, the top fixed connection buffer spring's of base one end, buffer spring's the other end fixed connection buffer seat's bottom, the equal fixed connection connecting block in bottom both sides of buffer seat.

Further, the bottom fixed connection supporting leg of base, the supporting leg is the bar shaped plate, the bottom of supporting leg is carved with anti-skidding line, the quantity of supporting leg is two, two the supporting leg symmetric distribution is in the bottom both sides of base.

Further, one end of the movable block is fixedly connected with one end of a first spring, the other end of the first spring is fixedly connected with one side of the inner wall of the guide groove, and the first spring is sleeved inside the guide groove.

Further, the locating plate has been pegged graft to the inside of constant head tank, the bottom fixed connection limiting plate of locating plate, limiting plate sliding connection constant head tank, locating plate fixed connection is at the bottom lateral wall of protective housing, the quantity of locating plate is two, two the locating plate symmetric distribution is at the both ends lateral wall of protective housing, the top of protective housing articulates through the hinge has the movable cover, the handle is installed on the top of movable cover.

Further, the inside of fixing base is opened there is the cushion chamber, the inside sliding connection pressure disk of cushion chamber, the top lateral wall fixed connection connecting rod of pressure disk, the one end of the bottom fixed connection second spring of pressure disk, the bottom lateral wall of the other end fixed connection cushion chamber of second spring, the second spring is located the inside of cushion chamber, the one end sliding connection side channel of connecting rod, the side channel is seted up inside the one end lateral wall of fixing base.

Further, the inside of connecting block rotates the one end of connecting the connecting rod through the pivot, the other end of connecting rod rotates the inside of connecting the movable block through the pivot, the quantity of connecting rod is four, four the two bisymmetry distributions of connecting rod are in the both sides of cushion socket, the equal fixed connection connecting rod of both ends lateral wall of cushion socket, the top fixed connection of cushion socket inhales the shake rubber slab.

Further, the one end lateral wall of body passes through inside the one end of rotation connection fixed plate, the fixed plate is the L template, the bottom lateral wall fixed connection swash plate of body, the top lateral wall of tight fixed plate is supported to the bottom of swash plate.

Further, the top fixed connection guide block of ejector pad, the guide block is trapezoidal, the top lateral wall of guide block is the inclined plane, the guide block is the one end on inclined plane and is connected with the swash plate cooperation.

Furthermore, the inside of fixed plate rotates the connecting screw rod, the screw rod rotates to be connected in the inside of spread groove, the one end of screw rod runs through the fixed plate and fixed connection crank, screw rod threaded connection ejector pad.

Through the above-mentioned embodiment of this application, adopted buffering vibration damper, positioner and angle adjusting device, it is poor to have solved its shock resistance performance of current direct current circuit experimental box, can not protect the electronic component of box internal integrated well to lead to life weak point, and current direct current circuit experimental box when teaching, the show angle of inconvenient adjustment direct current circuit experimental box, thereby influence the problem of teaching effect.

Drawings

In order to more clearly illustrate the embodiments of the present application 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 introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic overall perspective view of an embodiment of the present application;

FIG. 2 is a schematic diagram of the overall internal structure of an embodiment of the present application;

fig. 3 is a schematic structural diagram of a rotating shaft, a body, a sloping plate, a guide block, a screw, a crank and a connecting groove according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a connecting rod, a second spring and a pressure plate according to an embodiment of the present application.

FIG. 5 is a schematic structural diagram of a connecting rod, a cushion seat and a connecting block according to an embodiment of the present application.

Fig. 6 is a schematic perspective view of a guide block according to an embodiment of the present application.

In the figure: 1. the base, 2, the supporting leg, 3, the guide way, 4, first spring, 5, the movable block, 6, the connecting rod, 7, buffer spring, 8, the buffing pad, 9, the connecting block, 10, inhale shake rubber slab, 11, the connecting rod, 12, the fixing base, 13, the handle, 14, the side channel, 15, the second spring, 16, the pressure disk, 17, the cushion chamber, 18, the body, 19, the protective housing, 20, the movable cover, 21, the connecting seat, 22, the spread groove, 23, the constant head tank, 24, the locating plate, 25, the limiting plate, 26, the crank, 27, the fixed plate, 28, the screw rod, 29, the ejector pad, 30, the guide block, 31, the swash plate, 32, the rotation axis.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The circuit experiment box in this embodiment can be suitable for the circuit experiment instrument to deposit, for example, the following circuit experiment box is provided in this embodiment, and the circuit experiment box in this embodiment can be used for the circuit experiment instrument to deposit.

The utility model provides an electric energy meter for electric circuit experiments, includes electric energy meter body, mount pad and dwang, the electric energy meter body is installed on the mount pad, the inside at the mount pad is installed to the dwang symmetry, upper end one side of mount pad is provided with and is used for driving dwang pivoted rotary device, and is two sets of the symmetry is provided with the dismouting mechanism that is used for installing the electric energy meter body on the dwang, need not unscrew a plurality of screws or bolt when carrying out the dismouting, and need not any tool, and it is efficient to dismantle, and it is very convenient to use.

Preferably, rotary device includes cross axle, worm and worm wheel, the worm corresponds with the dwang and is provided with two sets ofly, and two sets of worms all weld on the cross axle, the turn trough has been seted up to upper end one side of mount pad, and the turn trough joint has first bearing, the one end of cross axle is passed the inside of turn trough and is cup jointed in first bearing, the upside at the worm is connected in the worm wheel meshing, the fixed axle center department at the worm wheel of establishing of dwang cover, the equal joint of lower extreme has the second bearing on the inboard of mount pad, the both ends of dwang are all cup jointed in the second bearing.

The disassembly and assembly mechanism comprises a first threaded rod, a second threaded rod, a sliding block and an installation block, wherein the first threaded rod and the second threaded rod are welded on the rotating rod, the rotating directions of the threads are opposite, the installation block is fixedly connected with two sides of the electric energy meter body, a guide block is fixedly welded on the sliding block, a threaded hole is formed in the guide block, the two guide blocks are respectively in threaded connection with the first threaded rod and the second threaded rod through threaded holes, a sliding rod is fixed at one end, away from the guide block, of the sliding block, a first sliding groove matched with the sliding rod is formed in the installation block, a fixing groove is formed in the groove bottom of the first sliding groove, a fixing block matched with the fixing groove is fixedly connected below one side, away from the sliding block, of the sliding rod, when the electric energy meter body is installed, the transverse shaft is driven to rotate by the rotation of a handle on the rotating device, and then the meshing transmission of the transverse shaft and the worm gear is driven, the drive dwang is rotatory, the dwang can drive first threaded rod and the second threaded rod is rotatory when rotatory, and then let the guide block on first threaded rod and the second threaded rod be the motion of being close to each other, slide bar on the drive slider slides in the first spout in the installation piece, go into the fixed slot that corresponds in the first spout until the fixed block card, and then can install electric energy meter body and mount pad fast, staff's installation effectiveness has been improved, during the dismantlement, only need the reverse rotation handle, it withdraws from the fixed slot to drive the fixed block, can dismantle the electric energy meter body, need not twist off a plurality of screws or bolts when carrying out the dismouting, and need not any operating means, it is efficient to dismantle, and is very convenient to use.

The second spout has been seted up at the top of mount pad, the slider passes through the top sliding connection of second spout and mount pad, utilizes the slider to slide in the second spout for the rotation phenomenon can not appear when the guide block moves on the dwang.

Fixed cover is equipped with two sets of spacing rings on the dwang, and two sets of spacing rings are corresponding with the terminal position of first threaded rod and second threaded rod respectively, and the spacing ring of setting prevents that the guide block can not break away from second threaded rod or slider.

The cross axle is located the outside one end fixedly connected with handle of mount pad, be covered with anti-skidding line on the handle, the person's of being convenient for operation, the anti-skidding line can prevent to appear the hand slip phenomenon when rotating the handle.

Of course, the present embodiment can also be used in a circuit experiment box. Here, a detailed description is omitted, and the circuit experiment box according to the embodiment of the present application is described below.

Referring to fig. 1-6, a physical dc circuit experiment box includes a base 1, a damping device, a positioning device and an angle adjusting device;

the damping and shock-absorbing device comprises supporting legs 2, guide grooves 3, first springs 4, movable blocks 5, connecting rods 6, damping springs 7, a buffer seat 8, connecting blocks 9, a damping rubber plate 10, connecting rods 11, fixed seats 12, a handle 13, side grooves 14 and second springs 15, wherein the guide grooves 3 are formed in two sides of the top of the base 1, the movable blocks 5 are connected to the inside of the guide grooves 3 in a sliding mode, and the fixed seats 12 are fixedly connected to two sides of the top of the base 1;

the positioning device comprises a pressure plate 16, a buffer cavity 17, a body 18, a protective shell 19, a movable cover 20, a connecting seat 21, a positioning groove 23, a positioning plate 24 and a limiting plate 25, wherein the connecting seat 21 is fixedly connected to the top end of the fixed seat 12, the positioning groove 23 is formed in the top of the connecting seat 21, and the protective shell 19 is slidably connected to the center of the inside of the fixed seat 12;

the angle adjusting device comprises a crank 26, a fixing plate 27, a screw 28, a pushing block 29, a guide block 30, an inclined plate 31, a rotating shaft 32 and a connecting groove 22, wherein a body 18 is arranged inside the protective shell 19, the top end fixed connection fixing plate 27 of the shock-absorbing rubber plate 10 is arranged inside the fixing plate 27, the connecting groove 22 is formed in the fixing plate 27, and the pushing block 29 is connected with the connecting groove 22 in a sliding mode.

Open articulated movable cover through the handle, place the body in the inside of protective housing, keep this physical stamina to rotate through the rotation axis and connect in the protective housing, when the protective housing vibrates, the protective housing passes through the locating plate and drives the limiting plate and slide along the inside constant head tank of connecting seat, and the protective housing drives through the fixed plate and inhales the shake rubber slab and move down, inhales the shake rubber slab and provides a shock attenuation to the protective housing.

The top end of the base 1 is fixedly connected with one end of a buffer spring 7, the other end of the buffer spring 7 is fixedly connected with the bottom end of a buffer seat 8, and two sides of the bottom of the buffer seat 8 are fixedly connected with connecting blocks 9; the bottom end of the base 1 is fixedly connected with supporting legs 2, the supporting legs 2 are strip-shaped plates, anti-skid grains are engraved at the bottoms of the supporting legs 2, the number of the supporting legs 2 is two, and the two supporting legs 2 are symmetrically distributed on two sides of the bottom end of the base 1; one end of the movable block 5 is fixedly connected with one end of a first spring 4, the other end of the first spring 4 is fixedly connected with one side of the inner wall of the guide groove 3, and the first spring 4 is sleeved in the guide groove 3; positioning plates 24 are inserted into the positioning grooves 23 in an inserting manner, the bottom ends of the positioning plates 24 are fixedly connected with the limiting plates 25, the limiting plates 25 are connected with the positioning grooves 23 in a sliding manner, the positioning plates 24 are fixedly connected with the side walls of the bottom end of the protective shell 19, the two positioning plates 24 are symmetrically distributed on the side walls of the two ends of the protective shell 19, the top end of the protective shell 19 is hinged with a movable cover 20 through a hinge, and the top end of the movable cover 20 is provided with a handle 13; a buffer cavity 17 is formed in the fixed seat 12, a pressure plate 16 is slidably connected in the buffer cavity 17, a connecting rod 11 is fixedly connected to the side wall of the top end of the pressure plate 16, the bottom end of the pressure plate 16 is fixedly connected with one end of a second spring 15, the other end of the second spring 15 is fixedly connected with the side wall of the bottom end of the buffer cavity 17, the second spring 15 is located in the buffer cavity 17, one end of the connecting rod 11 is slidably connected with a side groove 14, and the side groove 14 is formed in the side wall of one end of the fixed seat 12; the inside of the connecting block 9 is rotatably connected with one end of a connecting rod 6 through a rotating shaft, the other end of the connecting rod 6 is rotatably connected with the inside of the movable block 5 through a rotating shaft, the number of the connecting rods 6 is four, the four connecting rods 6 are symmetrically distributed on two sides of the buffer seat 8 in pairs, the side walls of two ends of the buffer seat 8 are fixedly connected with connecting rods 11, and the top end of the buffer seat 8 is fixedly connected with a shock-absorbing rubber plate 10; the side wall of one end of the body 18 is rotatably connected with the inside of one end of a fixing plate 27 through a rotating shaft 32, the fixing plate 27 is an L-shaped plate, the side wall of the bottom end of the body 18 is fixedly connected with an inclined plate 31, and the bottom end of the inclined plate 31 tightly abuts against the side wall of the top end of the fixing plate 27; the top end of the push block 29 is fixedly connected with a guide block 30, the guide block 30 is trapezoidal, the side wall of the top end of the guide block 30 is an inclined plane, and one end of the guide block 30, which is an inclined plane, is connected with an inclined plate 31 in a matching manner; the inner part of the fixed plate 27 is rotatably connected with a screw 28, the screw 28 is rotatably connected inside the connecting groove 22, one end of the screw 28 penetrates through the fixed plate 27 and is fixedly connected with the crank 26, and the screw 28 is in threaded connection with a push block 29.

When the shock-absorbing rubber plate is used, the hinged movable cover 20 is opened through the handle 13, the body 18 is placed in the protective shell 19, the body 18 can be rotatably connected in the protective shell 19 through the rotating shaft 32, when the protective shell 19 vibrates, the protective shell 19 drives the limit plate 25 to slide along the positioning groove 23 in the connecting seat 21 through the positioning plate 24, the protective shell 19 drives the shock-absorbing rubber plate 10 to move downwards through the fixing plate 27, the shock-absorbing rubber plate 10 provides primary shock absorption for the protective shell 19, the shock-absorbing rubber plate 10 drives the buffer seat 8 to press the buffer spring 7 downwards so as to provide secondary shock absorption for the protective shell 19, the buffer seat 8 drives the connecting rod 6 rotatably connected with the connecting block 9 to move downwards, the connecting rod 6 pushes the movable block 5 to slide along the guide groove 3, the movable block 5 pushes the first spring 4 to be compressed in the guide groove 3 so as to provide tertiary shock absorption for the protective shell 19, and the shock-absorbing rubber plate 10 slides downwards along the side groove 14 through the connecting rod 11, connecting rod 11 drives pressure disk 16 and moves down along cushion chamber 17, pressure disk 16 drives the compression of second spring 15, thereby provide the quartic shock attenuation to protective housing 19, thereby provide better shock attenuation effect for body 18, avoid the inside electrical components of body 18 to damage under the vibrations effect, through rotating crank 26, crank 26 drives screw rod 28 and rotates in connecting groove 22 is inside, thereby screw

rod

28 and 29 screw rotations of ejector pad promote ejector pad 29 and slide along connecting groove 22, ejector pad 29 drives the guide block 30 and removes, thereby

ejector pad

29 and 31's inclined plane contact with swash plate 31 jack-up, swash plate 31 drives body 18 and rotates certain angle through rotation axis 32, thereby the show angle of convenient adjustment experiment, and convenient use.

The application has the advantages that:

1. the shock absorption protective shell is simple to operate, the hinged movable cover is opened through the handle, the body is placed inside the protective shell, the body can be rotatably connected into the protective shell through the rotating shaft, when the protective shell vibrates, the protective shell drives the limiting plate to slide along the positioning groove in the connecting seat through the positioning plate, the protective shell drives the shock absorption rubber plate to move downwards through the fixing plate, and the shock absorption rubber plate provides primary shock absorption for the protective shell;

2. the shock absorption rubber plate moves downwards along the side groove through the connecting rod, the connecting rod drives the pressure plate to move downwards along the buffer cavity, the pressure plate drives the second spring to compress, four times of shock absorption is provided for the protective shell, and therefore a better shock absorption effect is provided for the body and damage of electrical components inside the body under the shock effect is avoided;

3. this application is rational in infrastructure, and through rotating the crank, the crank drives the screw rod and rotates inside the spread groove, thereby the screw rod with ejector pad screw thread rotation promote the ejector pad slide along the spread groove, the ejector pad drives the guide block and removes, thereby the ejector pad with the inclined plane contact of swash plate with swash plate jack-up, the swash plate drives the body and passes through the certain angle of rotation axis rotation to the show angle of convenient adjustment experiment facilitates the use.

It is well within the skill of those in the art to implement, without undue experimentation, the present application is not directed to software and process improvements, as they relate to circuits and electronic components and modules.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A physical direct current circuit experimental box is characterized in that: comprises a base (1), a buffering vibration damping device, a positioning device and an angle adjusting device;

the damping and shock-absorbing device comprises supporting legs (2), guide grooves (3), first springs (4), movable blocks (5), connecting rods (6), buffer springs (7), buffer seats (8), connecting blocks (9), shock-absorbing rubber plates (10), connecting rods (11), fixing seats (12), handles (13), side grooves (14) and second springs (15), wherein the guide grooves (3) are formed in two sides of the top of the base (1), the movable blocks (5) are connected to the inside of the guide grooves (3) in a sliding mode, and the fixing seats (12) are fixedly connected to two sides of the top of the base (1);

the positioning device comprises a pressure plate (16), a buffer cavity (17), a body (18), a protective shell (19), a movable cover (20), a connecting seat (21), a positioning groove (23), a positioning plate (24) and a limiting plate (25), wherein the connecting seat (21) is fixedly connected to the top end of the fixed seat (12), the positioning groove (23) is formed in the top of the connecting seat (21), and the protective shell (19) is slidably connected to the center of the inside of the fixed seat (12);

the angle adjusting device comprises a crank (26), a fixing plate (27), a screw (28), a pushing block (29), a guide block (30), an inclined plate (31), a rotating shaft (32) and a connecting groove (22), wherein a body (18) is arranged inside a protective shell (19), the top end fixed connection fixing plate (27) of the shock-absorbing rubber plate (10) is arranged, the connecting groove (22) is formed inside the fixing plate (27), and the pushing block (29) is connected with the connecting groove (22) in a sliding mode.

2. A physical dc circuit experiment box according to claim 1, wherein: the top fixed connection buffer spring's of base (1) one end (7), the other end fixed connection buffer seat's of buffer spring (7) bottom (8), the equal fixed connection connecting block (9) in bottom both sides of buffer seat (8).

3. A physical dc circuit experiment box according to claim 1, wherein: the bottom fixed connection supporting leg (2) of base (1), supporting leg (2) are the strip shaped plate, the bottom of supporting leg (2) is carved with anti-skidding line, the quantity of supporting leg (2) is two, two supporting leg (2) symmetric distribution is in the bottom both sides of base (1).

4. A physical dc circuit experiment box according to claim 1, wherein: one end of the movable block (5) is fixedly connected with one end of the first spring (4), the other end of the first spring (4) is fixedly connected with one side of the inner wall of the guide groove (3), and the first spring (4) is sleeved inside the guide groove (3).

5. A physical dc circuit experiment box according to claim 1, wherein: the inside of constant head tank (23) is pegged graft and is had locating plate (24), bottom fixed connection limiting plate (25) of locating plate (24), limiting plate (25) sliding connection constant head tank (23), locating plate (24) fixed connection is at the bottom lateral wall of protective housing (19), the quantity of locating plate (24) is two, two locating plate (24) symmetric distribution is at the both ends lateral wall of protective housing (19), the top of protective housing (19) is articulated through the hinge has movable cover (20), handle (13) are installed on the top of movable cover (20).

6. A physical dc circuit experiment box according to claim 1, wherein: buffer chamber (17) have been opened to the inside of fixing base (12), inside sliding connection pressure disk (16) of buffer chamber (17), the top lateral wall fixed connection connecting rod (11) of pressure disk (16), the one end of the bottom fixed connection second spring (15) of pressure disk (16), the bottom lateral wall of the other end fixed connection buffer chamber (17) of second spring (15), second spring (15) are located the inside of buffer chamber (17), the one end sliding connection side groove (14) of connecting rod (11), side groove (14) are seted up inside the one end lateral wall of fixing base (12).

7. A physical dc circuit experiment box according to claim 1, wherein: the inside of connecting block (9) rotates the one end of connecting rod (6) through the pivot, the other end of connecting rod (6) rotates the inside of connecting movable block (5) through the pivot, the quantity of connecting rod (6) is four, four connecting rod (6) two bisymmetry distributions are in the both sides of cushion seat (8), the equal fixed connection connecting rod (11) of both ends lateral wall of cushion seat (8), the shock-absorbing rubber slab (10) of top fixed connection of cushion seat (8).

8. A physical dc circuit experiment box according to claim 1, wherein: the one end lateral wall of body (18) is passed through rotation axis (32) and is rotated inside the one end of connecting fixed plate (27), fixed plate (27) are the L template, the bottom lateral wall fixed connection swash plate (31) of body (18), the top lateral wall of fixed plate (27) is supported tightly in the bottom of swash plate (31).

9. A physical dc circuit experiment box according to claim 1, wherein: the top fixed connection guide block (30) of ejector pad (29), guide block (30) are trapezoidal, the top lateral wall of guide block (30) is the inclined plane, guide block (30) are the one end on inclined plane and swash plate (31) cooperation and are connected.

10. A physical dc circuit experiment box according to claim 1, wherein: the inside of fixed plate (27) is rotated and is connected screw rod (28), screw rod (28) are rotated and are connected in the inside of spread groove (22), the one end of screw rod (28) runs through fixed plate (27) and fixed connection crank (26), screw rod (28) threaded connection ejector pad (29).