Safety protection equipment of novel electric tool

Abstract

Safety protection equipment of a novel electric tool comprises a detection mechanism and a receiving mechanism. The detection mechanism comprises a shell, a rubber sleeve, a storage battery, a wireless transmitting circuit module and a detection circuit, the storage battery, the charging socket, the wireless transmitting circuit module and the detection circuit are installed in the shell, and the rubber sleeve is installed at the lower outer end of the shell; the receiving mechanism comprises a power module, a wireless receiving circuit and an element box, and the power module and the wireless receiving circuit are installed in the element box. The wireless electric tool is convenient to carry and can be fixed on the electric tool for use in any operation area, the power plug at the rear side end of the element box is inserted into a power socket for on-site power supply during use, the rubber sleeve is sleeved on the outer side of a metal part of a shell of the electric tool, and when the electric tool leaks electricity during use, the wireless transmitting circuit module can transmit a wireless signal immediately; and the wireless receiving circuit can immediately cut off the power supply of the electric tool after receiving the signal, so that the probability of electric shock of workers can be reduced as soon as possible. On the basis, the device has a good application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical safety equipment, in particular to a novel safety protection equipment for electric tools. Background Art

[0002] Portable power tools, such as manual electric drills, angle grinders, etc., require handheld operation by workers, so there is a chance of leakage due to various reasons, causing electric shock to workers. In the prior art, in order to prevent electric shock accidents, leakage protectors are installed at the power supply end (power socket). When the power tool leaks during use, the output power is disconnected in time, thereby reducing the occurrence of electric shock accidents for workers.

[0003] Although installing a leakage protector at the power supply end can reduce the chance of electric shock accidents, portable power tools are generally used in different places (for example, electricians and plumbers need to carry power tools to different households to perform work). Therefore, when there is no safety equipment such as a leakage protector in the work area, or when the installed leakage protector fails, it cannot be guaranteed that the power tool can maintain good leakage monitoring and protection. In summary, it is very necessary to provide a device that can be easily carried and used, and can further monitor and control leakage of power tools. Utility Model Content

[0004] In order to overcome the drawbacks of existing portable power tools as described in the background due to structural limitations, the utility model provides a new type of power tool safety protection device that can be easily carried and fixed on a power tool for use in any working area. Under the joint action of relevant mechanisms, when the corresponding monitored power tool has a leakage, the power supply of the power tool can be wirelessly disconnected at the first time, thereby reducing the chance of electric shock to workers as soon as possible.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A novel safety protection device for electric tools is characterized in that it includes a detection mechanism and a receiving mechanism; the detection mechanism includes a shell, a rubber sleeve, a battery, a wireless transmitting circuit module and a detection circuit, the battery, the wireless transmitting circuit module and the detection circuit are installed in the shell, and the rubber sleeve is installed at the lower outer end of the shell; the power output end of the detection circuit is electrically connected to the power input end of the wireless transmitting circuit module; the receiving mechanism includes a power module, a wireless receiving circuit and a component box, the power module and the wireless receiving circuit are installed in the component box, the rear outer end and the front outer end of the component box are respectively equipped with a power plug and a power socket, and the power output end of the wireless receiving circuit is electrically connected to the power input end of the power socket.

[0007] Furthermore, the inner diameter of the rubber sleeve is smaller than the outer diameter of the metal part of the power tool housing, and two contacts under one of the transmitting buttons of the wireless transmitting circuit module are electrically connected together.

[0008] Furthermore, the detection circuit includes an electrically connected diode, resistor, thyristor, relay and buzzer, and a copper sheet. The copper sheet is located outside the lower end of the shell, and the lower end of the copper sheet is in contact with the metal part of the power tool shell, the upper end of the copper sheet is connected to the positive electrode of the diode, the negative electrode of the diode is connected to one end of the resistor, the other end of the resistor is connected to the control electrode of the thyristor, the anode of the thyristor is connected to the control power input terminal of the relay, the normally open contact end of the relay is connected to the positive power input terminal of the buzzer, the cathode of the thyristor is connected to the positive power input terminal of the relay, and the negative power input terminal of the relay is connected to the negative power input terminal of the buzzer.

[0009] Furthermore, the wireless receiving circuit includes an electrically connected wireless receiving circuit module and a relay, the power output end of the wireless receiving circuit module is connected to the positive power input end of the relay, and the negative power input end of the wireless receiving circuit module is connected to the negative power input end of the relay.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the utility model can be conveniently carried, can be fixed on the power tool in any working area for use, when in use, the power plug at the rear end of the component box is inserted into the power socket of the on-site power supply, and the rubber sleeve is put on the outer side of the metal part of the power tool shell, when the power tool is in use and leaks electricity, the wireless transmitting circuit module can immediately transmit the wireless signal, and the wireless receiving circuit can immediately disconnect the power of the power tool after receiving it, which can reduce the probability of electric shock to the staff as soon as possible. Based on the above, the utility model has a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the overall structure and the partially enlarged structure of the utility model.

[0013] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0014] Figure 1 , 2As shown in the figure, the safety protection device of the new electric tool includes a detection mechanism and a receiving mechanism; the detection mechanism includes a shell 1, a rubber sleeve 2, a battery G1, a charging socket CZ, a wireless transmission circuit module W1 and a detection circuit 3, the battery G1, the charging socket CZ, the wireless transmission circuit module W1 and the detection circuit 3 are installed on the circuit board in the shell 1, and the front and rear ends of the rubber sleeve 2 are respectively installed on the left and right sides of the lower outer end of the shell 1 with bolts, nuts and fixing clips; the two poles of the battery G1 and the two poles of the charging socket CZ are respectively connected by wires (when the battery G1 is out of power, other 12V power chargers are inserted into the charging socket CZ to charge it) ), and connected in series with the power switch S1 and the power input terminal of the detection circuit, the thyristor VS anode and the buzzer B1 negative power input terminal through a wire, the power output terminal relay K1 of the detection circuit, the normally open contact terminal and the negative power input terminal and the power input terminal 1 and 2 pins of the wireless transmitting circuit module W1 are respectively connected through a wire; the receiving mechanism includes a power module W2 and a wireless receiving circuit 4, and a component box 5. The power module W2 and the wireless receiving circuit 4 are installed on the circuit board in the component box 5. A power plug 6 is installed at the rear outer end of the component box 5, and a power socket CZ is installed at the front end (the socket is located at the front outer end of the component box).

[0015] Figure 1 , 2As shown in , the inner diameter of the rubber sleeve 2 is smaller than the outer diameter of the metal part of the housing of the power tool 7, and the two contacts under the first transmitting button D1 of the wireless transmitting circuit module W1 are connected together through a wire. The detection circuit includes a diode VD, a resistor R1, a thyristor VS, a relay and a buzzer B1, and a copper sheet M connected through circuit board wiring. The copper sheet M is located outside the opening in the middle of the lower end of the housing 1, and the lower end of the copper sheet M is in close contact with the metal part of the housing of the power tool 7. The upper end of the copper sheet M is connected to the positive electrode of the diode VD, the negative electrode of the diode VD is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the control electrode of the thyristor VS. The anode of the thyristor VS is connected to the control power input end of the relay K1, the normally open contact end of the relay K1 is connected to the positive power input end of the buzzer B1, the cathode of the thyristor VS is connected to the positive power input end of the relay K1, and the negative power input end of the relay K1 is connected to the negative power input end of the buzzer B1. The wireless receiving circuit includes a wireless receiving circuit module W3 and a relay K2 connected via circuit board wiring, and the power output terminals 3 and 2 of the wireless receiving circuit module W3 and the power input terminals of the relay K2 are respectively connected via wires. The two power input terminals 1 and 2 of the power module W2, the two control power input terminals of the relay K2 of the wireless receiving circuit module and the inner side of the power plug 6 (CT) (located in the housing) are respectively connected via wires, the power output terminals 3 and 4 of the power module W2 and the power input terminals 1 and 2 of the wireless receiving circuit module W3 are respectively connected via wires, and the two normally closed contact terminals of the power output terminal relay K2 of the wireless receiving circuit and the two wiring terminals of the power socket CZ are respectively connected via wires.

[0016] Figure 1 , 2As shown in the figure, the new type can be conveniently carried and can be fixed on the power tool in any working area for use. The rubber sleeve is put on the outer side of the metal part of the power tool shell, and the copper sheet M is in close contact with the outer side of the metal part. When in use, the power plug CT (6) at the rear end of the component box is inserted into the power socket of the on-site power supply. In this way, the on-site 220V power supply enters the power input end of the power socket CZ through the power input end and the normally closed contact end of the relay K2 (at the same time, the power module W2 is powered on and its 3rd and 4th pins output a stable DC 12V power supply to enter the power input end of the wireless receiving circuit module W3). After the subsequent staff inserts the power plug of the power tool into the jack of the power socket CZ, the power tool can be used normally. After turning on the power switch S1, the detection circuit is powered on and works. When the electric tool 7 has no leakage, no power enters the control electrode of the thyristor VS, the thyristor VS will not be turned on, and the wireless transmitting circuit module W1 will not be powered on to work; when the electric tool 7 has leakage, the leakage current enters the copper sheet M through the metal part of the electric tool, and the leakage current enters the control electrode of the thyristor VS after half-wave rectification by the diode VD and current reduction and current limiting by the resistor R1, and the thyristor VS is triggered to turn on, and then the relay K1 is energized to attract its control power input terminal and the normally open contact terminal to close, the buzzer B is energized to sound to remind the staff that the electric tool is leaking, and the wireless transmitting circuit module W1 is energized to transmit the first wireless closing signal (the two contacts under the first button S1 of the wireless transmitting circuit module W1 are connected together). Within a range of 200 meters, after the wireless receiving circuit module W3 receives the signal immediately, its 3rd pin outputs a high level and enters the positive power input terminal of the relay K2. The relay K2 is energized and its control power input terminal and the normally closed contact terminal are opened. The power socket CZ will lose power, and then the power tool will also lose power, effectively preventing the staff from touching the metal part of the power tool with leakage with their hands and causing electric shock accidents.

[0017] Figure 2 In the figure, the resistance value of resistor R1 is 500K; battery G1 is a lithium battery of model 12V / 5Ah; relays K1 and K2 are DC12V relays; power module W2 is a finished product of AC 220V to DC 12V switching power module; thyristor VS model is MCR100-1; buzzer B1 is a finished product of active continuous sound buzzer alarm of model MF12V; diode VD model is 1N4007; wireless transmitting circuit module W1 and wireless receiving circuit module W3 are finished products of wireless transmitting and receiving circuit module of model FW200 (the working principle is consistent with the automotive wireless transmitting and receiving circuit module, and this application will not repeat it).

[0018] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the utility model.

[0019] In addition, it should be understood that although the present specification is described according to the implementation mode, the implementation mode does not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A new type of safety protection device for electric tools, characterized in that: It includes a detection mechanism and a receiving mechanism; the detection mechanism includes a shell, a rubber sleeve, a battery, a wireless transmitting circuit module and a detection circuit, the battery, the wireless transmitting circuit module and the detection circuit are installed in the shell, and the rubber sleeve is installed at the lower outer end of the shell; the power output end of the detection circuit is electrically connected to the power input end of the wireless transmitting circuit module; the receiving mechanism includes a power module, a wireless receiving circuit and a component box, the power module and the wireless receiving circuit are installed in the component box, the rear outer end and the front outer end of the component box are respectively installed with a power plug and a power socket, the power output end of the wireless receiving circuit is electrically connected to the power input end of the power socket.

2. The new safety protection device for electric tools according to claim 1 is characterized in that: The inner diameter of the rubber sleeve is smaller than the outer diameter of the metal part of the power tool housing, and two contacts under one of the transmitting buttons of the wireless transmitting circuit module are electrically connected together.

3. The new safety protection device for electric tools according to claim 1 is characterized in that: The detection circuit includes an electrically connected diode, resistor, thyristor, relay and buzzer, and a copper sheet. The copper sheet is located outside the lower end of the shell, and the lower end of the copper sheet is in contact with the metal part of the power tool shell. The upper end of the copper sheet is connected to the positive electrode of the diode, the negative electrode of the diode is connected to one end of the resistor, the other end of the resistor is connected to the thyristor control electrode, the thyristor anode is connected to the relay control power input terminal, the relay normally open contact terminal is connected to the positive power input terminal of the buzzer, the thyristor cathode is connected to the positive power input terminal of the relay, and the negative power input terminal of the relay is connected to the negative power input terminal of the buzzer.

4. The new safety protection device for electric tools according to claim 1 is characterized in that: The wireless receiving circuit includes an electrically connected wireless receiving circuit module and a relay, wherein the power output end of the wireless receiving circuit module is connected to the positive power input end of the relay, and the negative power input end of the wireless receiving circuit module is connected to the negative power input end of the relay.

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