CN213550226U - Anti-theft draw-bar box schoolbag with hidden self-powered device - Google Patents

Abstract

The utility model provides a hide from power supply unit's theftproof draw-bar box schoolbag which characterized in that includes: a supporting plate, a handle and an integrated part, wherein the upper end of the handle is an adjustable telescopic rod, the middle part of the handle is provided with the integrated part, the lower end of the handle is provided with a fixed rod, wheels are arranged at two ends of the fixed rod, a supporting plate is arranged on the side surface of the fixed rod, the integrated part comprises a Bluetooth anti-lost device, a positioning device and a storage battery, the storage battery supplies power to each module of the device, a power supply module is arranged on the inner side between the wheel and the fixed rod, the power supply module is sequentially provided with a wire coil, a voltage stabilization control chip, a bearing shaft and a magnet from inside to outside, the storage battery is charged through the voltage stabilization control chip, the power supply module supplies power to the storage battery in the draw-bar box, the device is energy-saving and convenient, the functions of self power supply, loss prevention and accurate positioning are added, moreover, the devices are hidden in the schoolbag support and the bottom wheels, so that the devices are not easy to be found by people, and the possibility of losing the schoolbag is greatly reduced.

Description

Anti-theft draw-bar box schoolbag with hidden self-powered device

The technical field is as follows:

the utility model relates to an electronic equipment field specifically is a hide from power supply unit's theftproof draw-bar box schoolbag.

Background art:

the pupil is at class at ordinary times, and the occasion that uses the pull rod schoolbag such as seat at ordinary times, go out to play, all can be careless carelessly, falls the schoolbag, perhaps lets other people take by mistake, has caused the loss of schoolbag, will very trouble at that time, hardly finds back, causes certain loss of property, very inconvenient.

The existing anti-theft devices on the market are basically powered by solar energy, are easy to damage in normal use and easy to damage people after being stolen, and at that time, an anti-theft system is out of power and cannot work continuously.

The utility model has the following contents:

in order to solve the technical problem, the utility model relates to a hide from power supply unit's theftproof draw-bar box schoolbag, include: the upper end of the handle is provided with an adjustable telescopic rod, the middle of the handle is provided with an integrated part, the lower end of the handle is provided with a fixed rod, the two ends of the fixed rod are provided with wheels, the side surface of the fixed rod is provided with a supporting plate,

the integrated part comprises a Bluetooth anti-lost device, a positioning device and a storage battery, the positioning device is used for positioning by a GPS,

the accumulator supplies power to each module of the device,

the inner side is equipped with power module between wheel and the dead lever, power module is equipped with wire coil, steady voltage control chip, bearing and magnet from inside to outside in proper order, charges for the battery through steady voltage control chip, and connecting wire is waterproof enameled wire, and power module is the inside battery power supply of draw-bar box.

In a further technical scheme, a method for calculating the number of turns of a wire coil comprises the following steps:

a method of calculating the number of turns of a wire coil, the method comprising the steps of:

1) determining the magnetic flux constant B of the magnet according to the size and the size of the magnet;

2) measuring radius r of connecting rod₁Half-diameter r after winding of coil₂And the maximum radius r of the wheel_Wheel；

3) Calculating the length L of the magnetic induction line cut by the coil, and measuring the actual effective cutting length L_{Is effective}And the number of coil turns N, L is obtained by the formula_{Is effective}N x 2 may yield L,

4) calculating the velocity V of the magnetic field cut by the coil according to the formula

It is possible to calculate that,

5) formula mentioned in said 4

Rotational speed n in (1) from

Calculated, wherein the minimum speed of the person walking can be obtained by reference to data given on the network or by self-measurement,

6) substituting the obtained magnetic flux constant B of the magnet, the length L of the coil cutting magnetic induction line and the speed V of the coil cutting magnetic field into E-B-L-V; e in the formula is the output voltage of the known voltage stabilizing chip, namely the fixed parameter E, and the number of turns of the coil can be obtained by conversion

7) It is worth noting that the number of turns of the coil N and the radius r of the coil after winding₂There is a corresponding relationship where the losses during winding are neglected and a certain width on the connecting rod is taken into account when the coil is woundAnd the number of layers, whose line-graph development length L is to be measured_ThreadAnd a constant K when the coil is wound on the rod by a single layer,

8) and the coil is unfolded for a length L_ThreadSubstitution of constant K when coil is wound on rod in single layer

Calculating the number of turns N of the corresponding coil and the radius r of the wound coil₂The relationship between the quantity of the two components,

9) the data obtained from 1-8 above can be used to obtain the number of turns N of the coil.

Further technical scheme, the anti-lost device relies on the bluetooth to connect.

Compared with the prior art, the beneficial effects of the utility model are that:

the device is energy-saving and convenient, and on the basis of not changing the original pull rod schoolbag, the functions of self power supply, loss prevention and accurate positioning are added, and the devices are hidden in the schoolbag bracket and the wheels at the bottom, so that the probability of losing the schoolbag, which is greatly reduced, is not easy to find for people.

The self-powered draw-bar box schoolbag device can fully exert the practicability, play a certain positive role in solving the problem of schoolbag loss caused by the special conditions, and effectively prevent the schoolbag from being lost; the lost schoolbag can be accurately positioned and conveniently retrieved; the device can be self-powered, the cruising function of the device can be realized, and the working time of the device is prolonged. Is very convenient and practical.

Description of the drawings:

the accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1: the utility model has an integral structure

FIG. 2: the utility model discloses part of the structure schematic diagram

FIG. 3: the utility model discloses part of the structure schematic diagram

FIG. 4: the utility model discloses part of the structure schematic diagram

FIG. 5: circuit diagram of the invention

FIG. 6: circuit diagram of the invention

Reference numerals: the handle 1, the wheel 2, the integrated part 3, the supporting plate 4, the magnet 5, the fixing rod 6, the wire coil 7 and the bearing 8.

The specific implementation mode is as follows:

as shown in the figures, an anti-theft draw-bar box schoolbag hiding a self-powered device comprises: the handle comprises a supporting plate 4, a handle 1 and an integrated part 3, wherein the upper end of the handle 1 is an adjustable telescopic rod, the integrated part 3 is arranged in the middle, a fixing rod 6 is arranged at the lower end of the handle, wheels 2 are arranged at two ends of the fixing rod 6, and the supporting plate 4 is arranged on the side surface of the fixing rod 6.

Integrated part 3 relies on the bluetooth to connect including bluetooth anti-lost device, positioner and battery anti-lost device, leaves the schoolbag certain distance as the user, and the bluetooth device will lose the connection, in case lose the connection, and anti-lost device will report to the police to play and prevent losing, remind, the effect of looking for. The positioning device is used for multiple positioning of GPS, Beidou, base station and WIFI, the position of the schoolbag can be accurately positioned in real time, and the schoolbag can be conveniently found back after being lost; the storage battery supplies power to each module of the device and can directly charge the device through the USB interface; the integrated part 3 is arranged inside the pull rod schoolbag support, is not easy to discover and damage, and plays a role in hiding and preventing theft.

The inboard is equipped with power module between wheel 2 and the dead lever 6, power module is equipped with wire coil 7, bearing 8 and magnet 5 from inside to outside in proper order, when dragging the draw-bar box, can make the bottom wheel rotatory, respectively is provided with four magnets inside two wheels, hides inside the wheel, and when the wheel motion, inside wire coil will do the motion of cutting magnetism sense line, produces the electric energy, charges for the battery through steady voltage control chip, reaches the effect for the device self-power. The connecting lead is a waterproof enameled wire, so that the draw-bar box can normally carry out self-powered work in rainy days, the power supply module supplies power to a storage battery in the draw-bar box,

a method of calculating the number of turns of a wire coil, the method comprising the steps of:

1. determining the magnetic flux constant B of the magnet according to the size and the size of the magnet;

2. measuring radius r of connecting rod₁Half-diameter r after winding of coil₂And the maximum radius r of the wheel_Wheel；

3. Calculating the length L of the magnetic induction line cut by the coil, and measuring the actual effective cutting length L_{Is effective}And the number of coil turns N, L is obtained by the formula_{Is effective}N x 2 may yield L,

4. calculating the velocity V of the magnetic field cut by the coil according to the formula

It is possible to calculate that,

5. formula mentioned in said 4

Rotational speed n in (1) from

Calculated, wherein the minimum speed of the person walking can be obtained by reference to data given on the network or by self-measurement,

6. substituting the obtained magnetic flux constant B of the magnet, the length L of the coil cutting magnetic induction line and the speed V of the coil cutting magnetic field into E-B-L-V; e in the formula is the output voltage of the known voltage stabilizing chip, namely the fixed parameter E, and the number of turns of the coil can be obtained by conversion

7. It is worth noting that the number of turns of the coil N and the radius r of the coil after winding₂There is a corresponding relationship where the loss at winding is neglected and the coil development length L is measured considering that there is a certain width and number of layers on the tie-bar at the time of winding the coil_ThreadAnd a constant K when the coil is wound on the rod by a single layer,

8. and the coil is unfolded for a length L_ThreadSubstitution of constant K when coil is wound on rod in single layer

Calculating the number of turns N of the corresponding coil and the radius r of the wound coil₂The relationship between the quantity of the two components,

9. the data obtained from 1-8 above can be used to obtain the number of turns N of the coil.

The self-powered draw-bar box schoolbag device can give full play to the practicability, plays a certain positive role in solving the practical problems in life, and effectively prevents the schoolbag from being lost; the lost schoolbag can be accurately positioned and conveniently retrieved; and the device can be self-powered, the endurance function of the device is increased, and the working time of the device is prolonged. The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the technical means, but also comprises the technical scheme consisting of the equivalent replacement of the technical features. The present invention is not to be considered as the best thing, and belongs to the common general knowledge of the technicians in the field.

Claims (2)

1. The utility model provides a hide from power supply unit's theftproof draw-bar box schoolbag which characterized in that includes: the upper end of the handle is provided with an adjustable telescopic rod, the middle of the handle is provided with an integrated part, the lower end of the handle is provided with a fixed rod, the two ends of the fixed rod are provided with wheels, the side surface of the fixed rod is provided with a supporting plate,

the integrated part comprises a Bluetooth anti-lost device, a positioning device and a storage battery, the positioning device is used for positioning by a GPS,

the accumulator supplies power to each module of the device,

the inner side is equipped with power module between wheel and the dead lever, power module is equipped with wire coil, steady voltage control chip, bearing and magnet from inside to outside in proper order, charges for the battery through steady voltage control chip, and connecting wire is waterproof enameled wire, and power module is the inside battery power supply of draw-bar box.

2. The anti-theft draw-bar box schoolbag with a concealed self-powered device as claimed in claim 1, wherein: the anti-lost device is connected by means of Bluetooth.

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