Paper shredder with wastebin closing detection module

Abstract

The utility model provides a paper shredder with a wastebin closing detection module, which comprises a host and a wastebin, and a paper shredder core and a core power supply circuit are arranged in the host. The wastebin closing detection module comprises a first magnetic attraction piece and a conductive element which are arranged on the wastebin, and a second magnetic attraction piece and a detection signal generation circuit which are arranged on the host, a contact signal output end is arranged in the detection signal generation circuit, and the contact signal output end is electrically connected with the movement power supply circuit; when the wastebin is separated from the host, the detection signal generation circuit is disconnected, and the movement power supply circuit is not conducted; when the wastebin is connected to the main machine, the first magnetic attraction piece is connected with the second magnetic attraction piece in a magnetic attraction mode, the detection signal generating circuit is conducted through the conductive element, and the contact signal output end outputs a voltage signal to enable the machine core power supply circuit to be conducted. The wastebin closing detection module disclosed by the utility model not only can ensure that the wastebin can be mounted in place at any time, but also can conduct a host power supply of a paper shredder when the wastebin is mounted in place.

Description

Technical Field

[0001] The utility model relates to the technical field of paper shredders, and more specifically to a paper shredder provided with a waste paper barrel closure detection module. Background Art

[0002] As a machine for shredding discarded document paper, a shredder needs to stop the machine and remove the waste paper barrel to clean the paper scraps whenever the waste paper barrel is full of paper scraps. Then, the waste paper barrel needs to be reinstalled before it can be turned on again. In this way, the waste paper barrel needs to be disassembled and assembled frequently. In the prior art shredder, the waste paper barrel is connected to the main machine of the shredder by a buckle. A micro switch is provided on the main machine of the shredder, and a structure for triggering the micro switch is provided on the waste paper barrel. When the waste paper barrel is installed in place, the waste paper barrel will trigger the micro switch at the same time, turning on the main machine power of the shredder. The buckle on the waste paper barrel is generally made of plastic, which will produce elastic deformation when it is connected. After a long time of use, the elastic performance of the buckle decreases, and even irreversible plastic deformation may occur, resulting in the waste paper barrel being unable to be installed in place. In this way, the micro switch may not be triggered, resulting in the shredder not being able to start smoothly, affecting the user experience. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a paper shredder provided with a waste paper barrel closure detection module, and the waste paper barrel closure detection module is used to replace the snap connection between the waste paper barrel and the main body of the paper shredder in the prior art, so as to ensure that the waste paper barrel can be installed in place at any time, and the main body power of the paper shredder can be turned on when the waste paper barrel is installed in place.

[0004] The technical solution of the utility model is to provide a paper shredder provided with a waste paper barrel closure detection module, comprising a mainframe, a detachable waste paper barrel being provided on the mainframe, a paper shredder core and a core power supply circuit for powering the paper shredder core being provided in the mainframe, the waste paper barrel closure detection module comprising a first magnetic attraction member and a conductive element provided on the waste paper barrel, and a second magnetic attraction member and a detection signal generating circuit provided on the mainframe, the conductive element being provided with a first contact and a second contact, the detection signal generating circuit being provided with a third contact, a fourth contact and a contact signal output terminal electrically connected to the third contact or the fourth contact, the contact signal output terminal being also electrically connected to the core power supply circuit; when the waste paper barrel is separated from the mainframe, the detection signal generating circuit is disconnected at the third contact and the fourth contact, and the core power supply circuit is not turned on; when the waste paper barrel is connected to the mainframe, the first magnetic attraction member is magnetically connected to the second magnetic attraction member, the first contact and the second contact are respectively in contact with the third contact and the fourth contact to turn on the detection signal generating circuit, and the contact signal output terminal outputs a voltage signal to turn on the core power supply circuit.

[0005] Compared with the prior art, the paper shredder provided with a waste paper barrel closure detection module of the utility model has the following advantages: when the waste paper barrel is to be connected to the host, the first magnetic attraction component of the waste paper barrel closure detection module is magnetically connected to the second magnetic attraction component, which can ensure that the waste paper barrel is installed in place, and the magnetic connection performance is stable, and there will be no problem that the waste paper barrel cannot be installed in place due to deformation; when the waste paper barrel is installed in place, the conductive element of the waste paper barrel closure detection module is connected to the detection signal generating circuit, so that the detection signal generating circuit is turned on, and the contact signal output terminal outputs a voltage signal to turn on the movement power supply circuit, ensuring that the shredder movement can start smoothly, improving the user experience, and using contact contact to turn on the circuit is much more labor-saving than using a pressing micro switch to turn on the circuit. As long as the first magnetic attraction component is magnetically connected to the second magnetic attraction component, the corresponding contacts can be made in contact, and there is no need to press the waste paper barrel hard.

[0006] Preferably, an indicator light is also provided on the host, and the contact signal output terminal is also electrically connected to the indicator light; when the waste paper bucket is disconnected from the host, the indicator light is off; when the waste paper bucket is connected to the host, the contact signal output terminal outputs a voltage signal to light up the indicator light. With this structure, an indicator light is used to indicate the output voltage of the contact signal output terminal, which can quickly determine whether the power supply circuit of the movement is turned on, and is also convenient for circuit fault finding.

[0007] Preferably, the waste paper barrel closure detection module also includes a Hall element and a signal processing circuit arranged on the host, the Hall element is provided with a Hall signal output end, the signal processing circuit is provided with two input ends and one output end, the two input ends of the signal processing circuit are electrically connected to the contact signal output end and the Hall signal output end respectively, the output end of the signal processing circuit is electrically connected to the movement power supply circuit, the signal processing circuit is used to perform a logical AND operation on the output voltage signal of the contact signal output end and the output voltage signal of the Hall signal output end, and modulate the voltage signal generated by the logical AND operation and then output it; the first magnetic attraction component is a magnetic block or a magnet; when the waste paper barrel is connected to the host, the first magnetic attraction component approaches the Hall element to cause the Hall element to generate a Hall signal, the contact signal output end and the Hall signal output end both output voltage signals to the signal processing circuit, and the output end of the signal processing circuit outputs a voltage signal to turn on the movement power supply circuit. With this structure, only when the waste paper bin is installed in place can the Hall element generate a Hall signal and the output end of the signal processing circuit can output a voltage to turn on the signal movement power circuit, thereby preventing the third contact and the fourth contact from being short-circuited due to a humid environment or other reasons, causing the movement power circuit to be turned on when the waste paper bin is not installed, thereby improving the safety of the shredder.

[0008] Preferably, an indicator light is also provided on the host, and the output end of the signal processing circuit is also electrically connected to the indicator light; when the waste paper bucket is disconnected from the host, the indicator light is off; when the waste paper bucket is connected to the host, the output end of the signal processing circuit outputs a voltage signal to light up the indicator light. With this structure, an indicator light is used to indicate the output voltage of the output end of the signal processing circuit, which can quickly determine whether the power supply circuit of the movement is turned on, and is also convenient for circuit fault finding.

[0009] Preferably, the indicator light is a light emitting diode, the cathode of the light emitting diode is grounded GND, the anode of the light emitting diode is electrically connected to a third resistor, the anode of the light emitting diode is electrically connected to the outside through the third resistor, and the third resistor is used to adjust the voltage drop between the anode and cathode of the light emitting diode. With this structure, the circuit structure is simple, and the voltage drop between the anode and cathode of the light emitting diode can be adjusted by the third resistor to protect the light emitting diode.

[0010] Preferably, the detection signal generating circuit is provided with a first resistor and a second resistor, the third contact is connected to the power supply VCC through the first resistor, the fourth contact is connected to the ground GND through the second resistor, and the first resistor and the second resistor are used to adjust the output voltage of the contact signal output terminal. With this structure, by setting the voltage of the power supply VCC and the resistance values ​​of the first resistor and the second resistor, the output voltage of the contact signal output terminal can be conveniently adjusted when the signal processing circuit is turned on.

[0011] Preferably, the first magnetic member is disposed between the first contact and the second contact, or the first magnetic member includes at least two magnetic blocks and is disposed on both sides of the conductive element; correspondingly, the second magnetic member is located at a position on the host corresponding to the first magnetic member. With this structure, the magnetic connection between the first magnetic member and the second magnetic member can make the first contact and the second contact accurately contact with the third contact and the fourth contact respectively, avoiding the misalignment of the contacts after the waste paper bucket is installed on the host, resulting in the failure of the detection signal generating circuit to conduct.

[0012] Preferably, the conductive element is a conductive metal strip. With this structure, the conductive metal strip has a simple structure and a thin thickness, and is also convenient to install on the waste paper barrel.

[0013] Preferably, the first magnetic member is located between the first contact and the second contact, and correspondingly, the Hall element and the second magnetic member are both located at positions on the host corresponding to the first magnetic member, and when the waste paper bucket is connected to the host, the first magnetic member is in contact with the Hall element. With this structure, the first magnetic member is in contact with the Hall element, which can make the Hall element sense a Hall signal with the maximum potential, thereby improving the sensitivity of the Hall element.

[0014] Preferably, the signal processing circuit and the core power supply circuit are integrated on the same single chip microcomputer. With this structure, the circuit integration is improved, which is beneficial to reducing costs and is also convenient for assembly on the host. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the circuit structure of Example 1 of the waste paper barrel closure detection module of the utility model.

[0016] Figure 2 This is a schematic diagram of the circuit structure of Example 2 of the waste paper barrel closure detection module of the utility model. DETAILED DESCRIPTION

[0017] In order to better understand the present application, a more detailed description of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0018] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0019] It should also be understood that the terms "comprises", "having", "includes", "comprising", when used in this specification, indicate the presence of the described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof. In addition, when a statement such as "...at least one" appears after a list of listed features, it modifies the entire listed features rather than modifying the individual elements in the list.

[0020] Embodiment 1:

[0021] The utility model discloses a shredder provided with a waste paper barrel closure detection module, comprising a mainframe, on which a detachable waste paper barrel is provided, a shredder core and a core power supply circuit for supplying power to the shredder core are provided in the mainframe, and the waste paper barrel is located below the shredder core.

[0022] like Figure 1 As shown in the figure, the waste paper barrel closure detection module comprises a first magnetic attraction member and a conductive element arranged on the waste paper barrel, and a second magnetic attraction member and a detection signal generating circuit arranged on the host; the conductive element is a section of conductive metal strip, and the two ends of the conductive element are respectively provided with a first contact ( Figure 1 The contact 1-1 in the middle and the second contact ( Figure 1 The first magnetic member is a magnet, the first magnetic member is located between the first contact and the second contact, the second magnetic member can be a magnet or an iron sheet, and the second magnetic member is located at a position on the host corresponding to the first magnetic member; the detection signal generating circuit is provided with a first resistor and a second resistor, one end of the first resistor is connected to the power supply VCC, and the other end is provided with a third contact ( Figure 1One end of the second resistor is grounded GND, and the other end is provided with a fourth contact ( Figure 1 Contact 2 in the detection signal generating circuit), the third contact and the fourth contact are not in contact, that is, the detection signal generating circuit is disconnected at the third contact and the fourth contact, and a contact signal output terminal electrically connected to the fourth contact is provided in the detection signal generating circuit; the contact signal output terminal is externally connected to the positive electrode of a light-emitting diode, and the negative electrode of the light-emitting diode is grounded GND; the contact signal output terminal is also externally connected to the movement power supply circuit.

[0023] When the waste paper barrel is separated from the host, the detection signal circuit is broken, and there is no high-level output at the contact signal output end. The light-emitting diode cannot be lit, and the power circuit of the movement cannot be turned on, that is, the shredder movement will not start, ensuring safe operation.

[0024] When the waste paper bucket is connected to the host, the first magnetic attraction part is magnetically connected to the second magnetic attraction part, the waste paper bucket is installed in place, the first contact and the second contact are in contact with the third contact and the fourth contact respectively, the conductive element is connected to the detection signal generating circuit to make the detection signal generating circuit conductive, and the contact signal output terminal outputs a high level signal ( Figure 1 The contact signal in the shredder is used to light up the light-emitting diode and conduct the power circuit of the movement, that is, the shredder movement can be started smoothly, and the user experience is highly favorable.

[0025] The potential difference between the power supply VCC and the ground GND, and the resistance ratio of the first resistor and the second resistor determine the level of the output of the contact signal output terminal, that is, the voltage drop between the positive and negative electrodes of the light-emitting diode. In this embodiment, the power supply VCC provides a voltage of 5V, the ground GND defaults to zero potential, and the resistance values ​​of the first resistor and the second resistor are 10Ω and 100Ω respectively. After the detection signal generating circuit is turned on, the ideal level of the output of the contact signal output terminal is about 4.6V. The conduction voltage range of commonly used light-emitting diodes is between 1.6V and 4.5V. If a light-emitting diode with a low conduction voltage is used, a third resistor needs to be connected in series to the positive electrode of the light-emitting diode as a current-limiting resistor to avoid excessive voltage drop on the light-emitting diode and cause it to burn out.

[0026] The shredder movement and the movement power supply circuit both adopt the existing technology, which is not the inventive point of the present utility model. The contact signal output terminal outputs a high-level signal to turn on the movement power supply circuit, which can be achieved by a transistor switch, such as a CMOS transmission gate in a digital circuit. The movement power supply circuit can be integrated on a 51 single-chip microcomputer, and the contact signal output terminal is electrically connected to an input terminal of the 51 single-chip microcomputer. This is a conventional technical means in the prior art and is not the inventive point of the present utility model, so it will not be elaborated here.

[0027] Embodiment 2:

[0028] The paper shredder provided with a waste paper barrel closure detection module in this embodiment is different from that in Embodiment 1 in that the waste paper barrel closure detection module further includes a Hall element and a signal processing circuit, such as Figure 2 As shown in the embodiment, the waste paper barrel closure detection module further includes a Hall element ( Figure 2 The U1 element in the main unit) and the signal processing circuit, the Hall element is provided with a Hall signal output terminal, the signal processing circuit is provided with two input terminals and one output terminal, the two input terminals of the signal processing circuit are electrically connected to the contact signal output terminal and the Hall signal output terminal respectively, and the output terminal of the signal processing circuit is electrically connected to the movement power supply circuit. The Hall element and the second magnetic attraction member are both located at positions on the main unit corresponding to the first magnetic attraction member, and when the waste paper barrel is connected to the main unit, the first magnetic attraction member is attached to the Hall element.

[0029] The output voltage signal of the contact signal output end and the output voltage signal of the Hall signal output end are logically ANDed in the signal processing circuit, and the voltage signal generated by the logic ANDed is amplified by the signal processing circuit and then outputted to the movement power supply circuit from the output end of the signal processing circuit. The output end of the signal processing circuit is also used to drive a light emitting diode, the positive electrode of the light emitting diode is electrically connected to the output end of the signal processing circuit through the third resistor, the negative electrode of the light emitting diode is grounded GND, and the third resistor is used to adjust the voltage drop between the positive and negative electrodes of the light emitting diode.

[0030] When the waste paper barrel is separated from the host, the detection signal circuit is broken, the contact signal output end has no high-level output, and the Hall element cannot sense the high-level Hall signal because it is far away from the first magnetic attraction member. In this way, the output end of the signal processing circuit has no high-level output, the light-emitting diode cannot be lit, the power circuit of the movement cannot be turned on, and the shredder movement will not start. Even if the third contact and the fourth contact are short-circuited due to humidity or other unexpected faults, causing the contact signal output end to output a high level, the output end of the signal processing circuit has no high-level output, the light-emitting diode cannot be lit, and the power circuit of the movement cannot be turned on, that is, the shredder movement will not be started when the waste paper barrel is not installed in place, ensuring safe operation.

[0031] When the waste paper bucket is connected to the host, the first magnetic attraction part is magnetically connected to the second magnetic attraction part, the waste paper bucket is installed in place, the first contact and the second contact are in contact with the third contact and the fourth contact respectively, the conductive element is connected to the detection signal generating circuit to make the detection signal generating circuit conductive, and the contact signal output terminal outputs a high level signal ( Figure 2 The Hall element senses a high potential due to its contact with the first magnetic element, that is, the Hall signal output terminal also outputs a high level signal ( Figure 2In this way, the output end of the signal processing circuit can output a high level, light up the light-emitting diode, and turn on the power circuit of the movement, so that the shredder movement can start smoothly.

[0032] The signal processing circuit and the movement power supply circuit can be integrated on the same 51 single chip microcomputer ( Figure 2 The contact signal output terminal and the Hall signal output terminal are electrically connected to the two input terminals of the 51 single-chip microcomputer respectively. The output terminal of the signal processing circuit is not only electrically connected to the movement power supply circuit on the 51 single-chip microcomputer, but also electrically connected to the light-emitting diode through an output terminal of the 51 single-chip microcomputer. The logic and function of the signal processing circuit and the electrical signal amplification function can be realized on the 51 single-chip microcomputer. This is also a conventional technical means in the prior art, and it is not the inventive point of the utility model, so it will not be explained in detail here.

[0033] The above are only specific embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, they should be included in the protection scope of the claims of the present invention.

Claims

1. A paper shredder provided with a waste paper barrel closure detection module, comprising a main unit, a detachable waste paper barrel provided on the main unit, a paper shredder core and a core power supply circuit for supplying power to the paper shredder core provided in the main unit, characterized in that: The waste paper barrel closure detection module includes a first magnetic attraction member and a conductive element arranged on the waste paper barrel, and a second magnetic attraction member and a detection signal generating circuit arranged on the host. The conductive element is provided with a first contact and a second contact. The detection signal generating circuit is provided with a third contact, a fourth contact and a contact signal output end electrically connected to the third contact or the fourth contact, and the contact signal output end is also electrically connected to the movement power supply circuit; when the waste paper barrel is separated from the host, the detection signal generating circuit is disconnected at the third contact and the fourth contact, and the movement power supply circuit is not turned on; when the waste paper barrel is connected to the host, the first magnetic attraction member is magnetically connected to the second magnetic attraction member, the first contact and the second contact are respectively in contact with the third contact and the fourth contact to turn on the detection signal generating circuit, and the contact signal output end outputs a voltage signal to turn on the movement power supply circuit.

2. The paper shredder provided with a waste paper barrel closure detection module according to claim 1, characterized in that: The host is also provided with an indicator light, and the contact signal output terminal is also electrically connected to the indicator light; when the waste paper bucket is separated from the host, the indicator light is off; when the waste paper bucket is connected to the host, the contact signal output terminal outputs a voltage signal to light the indicator light.

3. The paper shredder provided with a waste paper barrel closure detection module according to claim 1, characterized in that: The waste paper barrel closure detection module also includes a Hall element and a signal processing circuit arranged on the host, the Hall element is provided with a Hall signal output terminal, the signal processing circuit is provided with two input terminals and one output terminal, the two input terminals of the signal processing circuit are electrically connected to the contact signal output terminal and the Hall signal output terminal respectively, the output terminal of the signal processing circuit is electrically connected to the movement power supply circuit, and the signal processing circuit is used to perform a logic AND operation on the output voltage signal of the contact signal output terminal and the output voltage signal of the Hall signal output terminal, and modulate the voltage signal generated by the logic AND operation and then output it; The first magnetic attraction component is a magnetic block or a magnet; when the waste paper barrel is connected to the host, the first magnetic attraction component approaches the Hall element to cause the Hall element to generate a Hall signal, and the contact signal output end and the Hall signal output end both output voltage signals to the signal processing circuit, and the signal processing circuit output end outputs a voltage signal to turn on the movement power circuit.

4. The paper shredder provided with a waste paper barrel closure detection module according to claim 3, characterized in that: The host is also provided with an indicator light, and the output end of the signal processing circuit is also electrically connected to the indicator light; when the waste paper bucket is separated from the host, the indicator light is off; when the waste paper bucket is connected to the host, the output end of the signal processing circuit outputs a voltage signal to light the indicator light.

5. The paper shredder provided with a waste paper barrel closure detection module according to claim 2 or 4, characterized in that: The indicator light is a light emitting diode, the cathode of the light emitting diode is grounded GND, the anode of the light emitting diode is electrically connected to a third resistor, the anode of the light emitting diode is electrically connected to the outside through the third resistor, and the third resistor is used to adjust the voltage drop between the anode and the cathode of the light emitting diode.

6. The paper shredder provided with a waste paper barrel closure detection module according to any one of claims 1 to 5, characterized in that: The detection signal generating circuit is provided with a first resistor and a second resistor, the third contact is connected to the power supply VCC through the first resistor, the fourth contact is connected to the ground GND through the second resistor, and the first resistor and the second resistor are used to adjust the output voltage of the contact signal output terminal.

7. The paper shredder provided with a waste paper barrel closure detection module according to claim 1, characterized in that: The first magnetic member is arranged between the first contact and the second contact, or the first magnetic member includes at least two magnetic blocks and is respectively arranged on both sides of the conductive element; correspondingly, the second magnetic member is located at a position on the host corresponding to the first magnetic member.

8. The paper shredder provided with a waste paper barrel closure detection module according to claim 1, characterized in that: The conductive element is a length of conductive metal strip.

9. The paper shredder provided with a waste paper barrel closure detection module according to claim 3, characterized in that: The first magnetic member is located between the first contact and the second contact. Correspondingly, the Hall element and the second magnetic member are both located at positions on the host corresponding to the first magnetic member. When the waste paper barrel is connected to the host, the first magnetic member is in contact with the Hall element.

10. The paper shredder provided with a waste paper barrel closure detection module according to claim 3, characterized in that: The signal processing circuit and the movement power supply circuit are integrated on the same single chip microcomputer.

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