A paper shredder full paper detection device and a paper shredder

Abstract

The application discloses a paper shredder full paper detection device and a paper shredder. The paper shredder full paper detection device comprises a detection module, a switch module, an infrared emission module, an infrared receiving module and a control module. The detection module is used for generating a weight detection signal and triggering the switch module when the weight of paper scraps in the paper cylinder of the paper shredder reaches a preset threshold. The switch module is in communication connection with the detection module. The switch module is arranged at the bottom of the paper cylinder slot of the paper shredder. The switch module is used for controlling the infrared emission module to be turned on. The infrared receiving module and the infrared emission module are arranged on the same plane with the discharge port of the paper shredder. The infrared emission module is used for generating infrared rays. The infrared receiving module is connected with the control module. The infrared receiving module is used for generating a height detection signal. The control module is used for determining whether the paper cylinder of the paper shredder is full according to the height detection signal. The paper shredder full paper detection device of the embodiment of the application is beneficial to reducing the possibility of false positives of the paper shredder and improving user experience.

Description

Technical Field

[0001] This invention relates to the field of paper shredder technology, and more particularly to a paper shredder full paper detection device and a paper shredder. Background Technology

[0002] A paper shredder is an office appliance consisting of a set of rotating blades, a paper comb, and a drive motor. The shredded paper is discharged into a paper tube for temporary storage. In existing technology, whether the paper tube is full is typically detected using an infrared photocell.

[0003] However, the paper scraps produced by the shredder are small and will fly around in the paper tube under the influence of static electricity, thus interfering with the infrared sensor's detection of the paper tube being full. This results in a higher possibility of false alarms from the shredder and a poor user experience. Summary of the Invention

[0004] This invention provides a paper shredder full paper detection device and a paper shredder to reduce the possibility of false alarms and improve user experience.

[0005] According to one aspect of the present invention, a full-paper detection device for a paper shredder is provided, the paper shredder full-paper detection device comprising: a detection module, a switch module, an infrared emitting module, an infrared receiving module, and a control module;

[0006] The detection module is used to generate a weight detection signal and trigger the switch module through the weight detection signal when the weight of paper scraps in the paper tube of the shredder reaches a preset threshold.

[0007] The switch module is communicatively connected to the detection module; the switch module is located at the bottom of the paper tube slot of the shredder; the switch module is used to control the infrared emitting module to turn on when the weight detection signal is received;

[0008] The infrared emitting module and the shredder's chip discharge port are located on the same plane; the infrared emitting module is used to generate infrared rays;

[0009] The infrared receiving module and the infrared transmitting module are disposed on the same plane; the infrared receiving module is connected to the control module; the infrared receiving module is used to generate a height detection signal;

[0010] The control module is used to determine whether the paper shredder tube is full of paper based on the height detection signal.

[0011] Optionally, the detection module includes: a cover plate, a transmitting element, and at least one elastic element;

[0012] One end of the elastic element is fixed inside the paper tube of the shredder; the other end of the elastic element is connected to the cover plate; there is a gap between the cover plate and the bottom surface of the paper tube of the shredder; the transmitting element is disposed on the side of the cover plate near the bottom surface of the paper tube of the shredder.

[0013] The cover plate is used to hold paper scraps; the elastic element is used to support the cover plate and to trigger the switching module by the transmitting element when the weight of the paper scraps reaches a preset threshold; the transmitting element is used to generate a weight detection signal.

[0014] Optionally, the transmitting element includes a magnet.

[0015] Optionally, the switching module includes: a signal receiving unit and a first switching unit;

[0016] The power supply terminal of the signal receiving unit is connected to the power supply voltage; the ground terminal of the signal receiving unit is grounded; the output terminal of the signal receiving unit is connected to the first terminal of the first switching unit; the second terminal of the first switching unit is connected to the infrared emitting module; and the third terminal of the first switching unit is connected to the ground terminal of the signal receiving unit.

[0017] The signal receiving unit is used to acquire the weight detection signal and generate a control signal based on the weight detection signal; the first switching unit is used to control the infrared emitting module to turn on based on the control signal.

[0018] Optionally, the signal receiving unit includes a Hall element.

[0019] Optionally, the first switching unit includes: a first switching resistor, a second switching resistor, and a first switching transistor;

[0020] The first end of the first switching resistor is connected to the signal receiving unit; the second end of the first switching resistor is connected to the control terminal of the first switching transistor; the first end of the first switching transistor is connected to the infrared emitting module; the second end of the first switching transistor is grounded; and the second switching resistor is connected between the control terminal of the first switching transistor and the second end of the first switching transistor.

[0021] Optionally, the infrared emitting module includes: an infrared emitting unit and a second switching unit;

[0022] The first terminal of the infrared emitting unit is connected to the power supply voltage; the second terminal of the infrared emitting unit is connected to the first terminal of the second switching unit; the second terminal of the second switching unit is grounded; the control terminal of the second switching unit is connected to the power supply voltage; the second terminal of the second switching unit is also connected to the switching module.

[0023] The second switching unit is used to control whether the infrared emitting unit generates infrared light.

[0024] Optionally, the infrared emitting unit includes: a first resistor and an infrared emitting diode;

[0025] The first end of the first resistor is connected to the power supply voltage; the second end of the first resistor is connected to the anode of the infrared emitting diode; and the cathode of the infrared emitting diode is connected to the second switching unit.

[0026] Optionally, the second switching unit includes: a second resistor and a second switching transistor;

[0027] The first terminal of the second switching transistor is connected to the infrared emitting unit; the second terminal of the second switching transistor is grounded; the control terminal of the second switching transistor is connected to the first terminal of the second resistor; the second terminal of the second resistor is connected to the switching module; and the second terminal of the second resistor is also connected to the power supply voltage.

[0028] Optionally, the full-paper detection device for the paper shredder also includes: a modulation module;

[0029] The modulation module is connected to the control module; the modulation module is also connected to the infrared emitting module.

[0030] The control module is also used to generate a modulation signal; the modulation module is used to modulate the infrared rays emitted by the infrared emitting module according to the modulation signal.

[0031] Optionally, the modulation module includes: a modulation switch and a modulation resistor;

[0032] The first terminal of the modulation switch is connected to the infrared emitting module; the second terminal of the modulation switch is grounded; the control terminal of the modulation switch is connected to the control module; and the modulation resistor is connected between the control terminal of the modulation switch and the second terminal of the modulation switch.

[0033] Optionally, the infrared receiving module includes: an infrared receiving unit and a rectification and voltage regulation unit;

[0034] The first terminal of the infrared receiving unit is connected to the power supply voltage; the second terminal of the infrared receiving unit is connected to the first terminal of the rectifier and voltage regulator unit; the second terminal of the rectifier and voltage regulator unit is connected to the control module; and the third terminal of the rectifier and voltage regulator unit is grounded.

[0035] The infrared receiving unit is used to generate an AC signal; the rectification and voltage regulation unit is used to rectify and regulate the AC signal to generate the height detection signal.

[0036] Optionally, the infrared receiving unit includes an infrared receiving tube.

[0037] Optionally, the rectifier and voltage regulator unit includes: a third resistor, a first capacitor, a first diode, a second diode, a fourth resistor, and a second capacitor;

[0038] The first end of the third resistor is connected to the infrared receiving unit; the second end of the third resistor is grounded; the first end of the first capacitor is connected to the first end of the third resistor; the second end of the first capacitor is connected to the anode of the first diode; the cathode of the first diode is connected to the control module; the anode of the second diode is connected to the second end of the third resistor; the cathode of the second diode is connected to the second end of the first capacitor; the first end of the fourth resistor is connected to the control module; the second end of the fourth resistor is connected to the second end of the third resistor; the second capacitor and the fourth resistor are connected in parallel.

[0039] According to another aspect of the present invention, a paper shredder is also provided, which includes the paper shredder full paper detection device described in any of the above embodiments.

[0040] This invention uses a detection module to detect the weight of paper scraps inside the shredder's paper tube. When the weight reaches a preset threshold, a switch module is triggered. The switch module activates an infrared emitting module, which generates infrared light and emits it into the shredder's paper tube. An infrared receiving module receives the emitted infrared light and generates a height detection signal based on the intensity of the received light. The control module acquires the height detection signal and uses it to determine whether the shredder's paper tube is full. Compared to existing technologies, this invention controls the infrared emitting module based on the weight of the paper scraps inside the shredder's paper tube, which helps avoid interference from static electricity in full-paper detection, reduces the possibility of false alarms, and improves the user experience.

[0041] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1This is a schematic diagram of a full-paper detection device for a paper shredder provided in an embodiment of the present invention;

[0044] Figure 2 This is an installation diagram of a detection module provided in an embodiment of the present invention;

[0045] Figure 3 This is an installation diagram of another detection module provided in an embodiment of the present invention;

[0046] Figure 4 This is a schematic diagram of another full-paper detection device for a paper shredder provided in an embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of another full-paper detection device for a paper shredder provided in an embodiment of the present invention;

[0048] Figure 6 This is a schematic diagram of another full-paper detection device for a paper shredder provided in an embodiment of the present invention;

[0049] Figure 7 This is a schematic diagram of another full-paper detection device for a paper shredder provided in an embodiment of the present invention;

[0050] Figure 8 This is a schematic diagram of another full-paper detection device for a paper shredder provided in an embodiment of the present invention;

[0051] Figure 9 This is a schematic diagram of a paper shredder provided in an embodiment of the present invention. Detailed Implementation

[0052] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0053] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0054] This invention provides a paper shredder full-paper detection device. This device is applicable to paper shredders and is used to detect whether the paper tubes of the shredder are full. Figure 1 This is a schematic diagram of a full-paper detection device for a paper shredder provided in an embodiment of the present invention. (Refer to...) Figure 1 The full paper detection device for the paper shredder includes: a detection module 110, a switch module 120, an infrared emitting module 130, an infrared receiving module 140, and a control module 150.

[0055] The detection module 110 generates a weight detection signal and triggers the switch module 120 via the weight detection signal when the weight of paper scraps in the shredder tube reaches a preset threshold. The switch module 120 is communicatively connected to the detection module 110. The switch module 120 is located at the bottom of the paper tube slot of the shredder. The switch module 120 controls the infrared emitting module 130 to turn on when the weight detection signal is received. The infrared emitting module 130 and the scrap discharge port of the shredder are located on the same plane. The infrared emitting module 130 generates infrared rays. The infrared receiving module 140 and the infrared emitting module 130 are located on the same plane. The infrared receiving module 140 is connected to the control module 150. The infrared receiving module 140 generates a height detection signal. The control module 150 determines whether the paper tube of the shredder is full of paper based on the height detection signal.

[0056] Specifically, the detection module 110 can be installed inside the paper tube of the shredder or at the bottom of the paper tube slot of the shredder. When the detection module 110 is installed inside the paper tube slot of the shredder, it supports the paper tube and triggers the switch module 120 based on the weight of the paper tube and the paper scraps inside. When the detection module 110 is installed inside the paper tube, it triggers the switch module 120 based on the weight of the paper scraps inside. The switch module 120 can be signal-triggered. The detection module 110 generates a weight detection signal, which is acquired by the switch module 120, which is triggered upon acquiring the weight detection signal. It should be noted that the detection module 110 can generate a weight detection signal when the weight of the paper scraps in the shredder tube or the weight of the shredder tube and its contents reaches a preset threshold. Alternatively, it can continuously generate a weight detection signal and communicate with the switch module 120 when the weight of the paper scraps in the shredder tube or the weight of the shredder tube and its contents reaches the preset threshold. This embodiment does not impose any limitations on this. The preset threshold is a pre-set threshold value that triggers the switch module 120 to conduct. In practical applications, the size of the preset threshold can be set according to the size of the shredder tube; this embodiment does not impose any limitations on this.

[0057] When the weight of paper scraps in the shredder tube or the weight of the shredder tube and its contents reaches a preset threshold, the detection module 110 triggers the switch module 120. At this time, the switch module 120 controls the infrared emitting module 130 to turn on, and the infrared emitting module 130 generates infrared rays and emits them into the shredder tube. When the weight of paper scraps in the shredder tube or the weight of the shredder tube and its contents does not reach the preset threshold, the detection module 110 does not trigger the switch module 120. At this time, the infrared emitting module 130 is in the off state, that is, the infrared emitting module 130 does not generate infrared rays.

[0058] Infrared receiving module 140 receives the infrared light emitted by infrared emitting module 130. When the shredder tube is not full, the infrared light emitted by infrared emitting module 130 travels a longer path from emission to reception, resulting in higher attenuation within the shredder tube and weaker infrared light received by infrared receiving module 140. When the shredder tube is full, the infrared light emitted by infrared emitting module 130 travels a shorter path, resulting in lower attenuation within the shredder tube and stronger infrared light received by infrared receiving module 140. Infrared receiving module 140 generates a height detection signal based on the strength of the received infrared light. Control module 150 acquires the height detection signal and determines whether the shredder tube is full based on the height detection signal.

[0059] In this embodiment of the invention, the detection module 110 detects the weight of paper scraps inside the shredder's paper tube, and triggers the switch module 120 when the weight of paper scraps in the paper tube reaches a preset threshold. The switch module 120 controls the infrared emitting module 130 to turn on, at which point the infrared emitting module 130 generates infrared light and emits it into the paper tube of the shredder. The infrared receiving module 140 receives the infrared light emitted by the infrared emitting module 130 and generates a height detection signal based on the strength of the received infrared light. The control module 150 acquires the height detection signal and determines whether the paper tube of the shredder is full based on the height detection signal. Compared with the prior art, this embodiment of the invention controls the infrared emitting module 130 by controlling the weight of paper scraps in the paper tube of the shredder, which helps to avoid interference from static electricity on full paper detection, reduces the possibility of false alarms from the shredder, and improves the user experience.

[0060] Figure 2 This is an installation diagram of a detection module provided in an embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 2 The detection module 110 includes: a cover plate 111, a transmitting element 112, and at least one elastic element 113.

[0061] One end of the elastic element 113 is fixed inside the paper tube 200 of the shredder; the other end of the elastic element 113 is connected to the cover plate 111; there is a gap between the cover plate 111 and the bottom surface of the paper tube 200 of the shredder; the transmitting element 112 is disposed on the side of the cover plate near the bottom surface of the paper tube 200 of the shredder; the cover plate 111 is used to carry paper scraps; the elastic element 113 is used to support the cover plate 111, and to trigger the switching module 120 when the weight of the paper scraps reaches a preset threshold; the transmitting element 112 is used to generate a weight detection signal.

[0062] Specifically, continue to refer to Figure 2 One end of the elastic element 113 is fixed to the bottom surface of the shredder paper tube 200. Paper scraps discharged from the shredder continuously accumulate on the cover plate 111. Under the action of the paper scraps, the elastic element 113 continuously deforms, and the cover plate 111 continuously moves towards the bottom surface of the shredder paper tube 200. The transmitting element 112 also moves towards the bottom surface of the shredder paper tube 200 along with the cover plate 111. When the weight of the paper scraps in the shredder paper tube reaches a preset threshold, the switch module 120 receives the weight detection signal emitted by the transmitting element 112. At this time, the switch module 120 is triggered, and the infrared emitting module 130 is turned on. For example, the transmitting element 112 can be a magnet.

[0063] Figure 3 This is an installation diagram of another detection module provided in an embodiment of the present invention. Optionally, refer to... Figure 3One end of the elastic element 113 can also be fixed to the inner wall of the paper tube of the shredder, and the other end of the elastic element 13 is also connected to the cover plate 111. Figure 3 The working principle of the detection module 110 with the structure shown is the same as Figure 2 The working principle of the detection module 110 with the structure shown is the same, and will not be described again here.

[0064] Figure 4 This is a schematic diagram of another full-paper detection device for a paper shredder provided in an embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 4 The switch module 120 includes a signal receiving unit 121 and a first switch unit 122.

[0065] The power supply terminal of the signal receiving unit 121 is connected to the power supply voltage VCC; the ground terminal of the signal receiving unit 121 is grounded; the output terminal of the signal receiving unit 121 is connected to the first terminal of the first switching unit 122; the second terminal of the first switching unit 122 is connected to the infrared emitting module 130; the third terminal of the first switching unit 122 is connected to the ground terminal of the signal receiving unit 121; the signal receiving unit 121 is used to acquire the weight detection signal and generate a control signal based on the weight detection signal; the first switching unit 122 is used to control the infrared emitting module 130 to conduct according to the control signal. The signal receiving unit 121 can be a Hall element.

[0066] Specifically, when the signal receiving unit 121 acquires the weight detection signal, it generates a control signal, and the first switching unit 122 controls the infrared emitting module 130 to turn on according to the control signal. For example, the control signal can be a level signal. When the signal receiving unit 121 does not acquire the weight detection signal, it outputs a high-level signal, at which time the first switching unit 122 controls the infrared emitting module 130 to turn off; when the signal receiving unit 121 acquires the weight detection signal, it outputs a low-level signal, at which time the first switching unit 122 controls the infrared emitting module 130 to turn on. A Hall element is a magnetic sensor based on the Hall effect, which can detect changes in the magnetic field of its environment. The Hall effect refers to the physical phenomenon where a transverse potential difference is generated when a magnetic field acts on charge carriers in a current-carrying metal conductor or semiconductor.

[0067] Based on the above embodiments, optionally, refer to... Figure 4 The first switching unit 122 includes: a first switching resistor R1, a second switching resistor R2, and a first switching transistor Q1.

[0068] The first terminal of the first switching resistor R1 is connected to the signal receiving unit 121; the second terminal of the first switching resistor R1 is connected to the control terminal of the first switching transistor Q1; the first terminal of the first switching transistor Q1 is connected to the infrared emitting module 130; the second terminal of the first switching transistor Q1 is grounded; and the second switching resistor R2 is connected between the control terminal of the first switching transistor Q1 and the second terminal of the first switching transistor Q1.

[0069] Specifically, when the signal receiving unit 121 does not acquire the weight detection signal, it outputs a high-level signal, at which time the first switch Q1 is turned on and the infrared emitting module 130 is turned off; when the signal receiving unit 121 acquires the weight detection signal, it outputs a low-level signal, at which time the first switch Q1 is turned off and the infrared emitting module 130 is turned on.

[0070] Figure 5 This is a schematic diagram of another full-paper detection device for a paper shredder provided in an embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 5 The infrared emitting module 130 includes an infrared emitting unit 131 and a second switching unit 132.

[0071] The first terminal of the infrared emitting unit 131 is connected to the power supply voltage VCC; the second terminal of the infrared emitting unit 131 is connected to the first terminal of the second switching unit 132; the second terminal of the second switching unit 132 is grounded; the control terminal of the second switching unit 132 is connected to the power supply voltage VCC; the second terminal of the second switching unit 132 is also connected to the switching module 120; the second switching unit 132 is used to control whether the infrared emitting unit 131 generates infrared rays.

[0072] Specifically, in combination Figure 4 and Figure 5 When the first switch unit 122 is turned off, the level of the control terminal of the second switch tube Q2 changes from low level to high level, and the second switch unit 132 is turned on. At this time, the circuit where the infrared emitting unit 131 is located is turned on, and the infrared emitting unit 131 generates infrared rays. When the first switch unit 122 is turned on, the level of the control terminal of the second switch tube Q2 is low level, and the second switch unit 132 is turned off. At this time, the circuit where the infrared emitting unit 131 is located is turned off, and the infrared emitting unit 131 does not work.

[0073] Based on the above embodiments, optionally, refer to... Figure 5 The infrared emitting unit 131 includes: a first resistor R3 and an infrared emitting tube JP1A.

[0074] The first end of the first resistor R3 is connected to the power supply voltage VCC; the second end of the first resistor R3 is connected to the anode of the infrared emitting diode JP1A; and the cathode of the infrared emitting diode JP1A is connected to the second switch unit 132.

[0075] Based on the above embodiments, optionally, refer to... Figure 5 The second switching unit 132 includes: a second resistor R4 and a second switching transistor Q2.

[0076] The first terminal of the second switch Q2 is connected to the infrared emitting unit 131; the second terminal of the second switch Q2 is grounded; the control terminal of the second switch Q2 is connected to the first terminal of the second resistor R4; the second terminal of the second resistor R4 is connected to the switch module 120; the second terminal of the second resistor R4 is also connected to the power supply voltage VCC. For example, in practical applications, a voltage divider resistor R5 can also be connected in series between the second resistor R4 and the power supply voltage VCC to divide the voltage of the power supply voltage VCC.

[0077] Specifically, continue to combine Figure 4 As shown in the diagram, when the first switch unit 122 is turned on, the level of the control terminal of the second switch tube Q2 is pulled low, and the second switch tube Q2 is turned off. At this time, the circuit where the infrared emitting tube JP1A is located is turned off, and the infrared emitting tube JP1A does not work. When the first switch unit 122 is turned off, the level of the control terminal of the second switch tube Q2 changes from low to high, and the second switch tube Q2 is turned on. At this time, the circuit where the infrared emitting tube JP1A is located is turned on, and the infrared emitting tube JP1A generates infrared light.

[0078] Figure 6 This is a schematic diagram of another full-paper detection device for a paper shredder provided in an embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 6 The full paper detection device for the paper shredder also includes a modulation module 160.

[0079] The modulation module 160 is connected to the control module 150; the modulation module 160 is also connected to the infrared emitting module 130; the control module 150 is also used to generate a modulation signal; the modulation module 160 is used to modulate the infrared rays emitted by the infrared emitting module 130 according to the modulation signal.

[0080] For example, the modulation signal can be a PWM (Pulse Width Modulation) signal. The modulation module 160 turns on and off according to the modulation signal, so that the infrared light generated by the infrared emitting module 130 follows the changes of the modulation signal. In this embodiment, the infrared light generated by the infrared emitting module 130 is modulated by the modulation signal, which helps to distinguish the infrared light generated by the infrared emitting module 130 from the infrared light in the natural environment, thereby reducing the impact of the natural environment on the full paper detection of the paper shredder.

[0081] Figure 7 This is a schematic diagram of another full-paper detection device for a paper shredder provided in an embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 7 The modulation module 160 includes a modulation switch Q3 and a modulation resistor R6.

[0082] The first terminal of the modulation switch Q3 is connected to the infrared emitting module 130; the second terminal of the modulation switch Q3 is grounded; the control terminal of the modulation switch Q3 is connected to the control module 150; and the modulation resistor R6 is connected between the control terminal of the modulation switch Q3 and the second terminal of the modulation switch Q3.

[0083] Specifically, the modulation switch Q3 is turned on and off according to the modulation signal, so that the infrared light generated by the infrared emitting module 130 follows the changes of the modulation signal. For example, a current-limiting resistor R7 can also be connected in series between the control terminal of the modulation switch Q3 and the control module 150 to limit the current flowing into the control terminal of the modulation switch Q3.

[0084] Figure 8 This is a schematic diagram of another full-paper detection device for a paper shredder provided in an embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 8 The infrared receiving module 140 includes an infrared receiving unit 141 and a rectifier and voltage regulator unit 142.

[0085] The first terminal of the infrared receiving unit 141 is connected to the power supply voltage VCC; the second terminal of the infrared receiving unit 141 is connected to the first terminal of the rectifier and voltage regulator unit 142; the second terminal of the rectifier and voltage regulator unit 142 is connected to the control module 150; the third terminal of the rectifier and voltage regulator unit 142 is grounded; the infrared receiving unit 141 is used to generate an AC signal; the rectifier and voltage regulator unit 142 is used to rectify and regulate the AC signal to generate a height detection signal.

[0086] Specifically, the infrared receiving unit 141 is activated by the infrared light emitted by the infrared emitting module 130. Under the modulation of the modulation module 160, the infrared light emitted by the infrared emitting module 130 is emitted in the form of pulses. Therefore, the infrared receiving unit 141 is also activated in the form of pulses. The DC power supplied by the power supply voltage VCC is converted into AC power, i.e., an AC signal, under the influence of the infrared receiving unit 141. The rectifier and voltage regulator unit 142 rectifies the AC signal output by the infrared receiving unit 141, converting the AC power back into DC power, and regulates the converted DC power to generate a height detection signal. It should be noted that the rectifier and voltage regulator unit 142 can isolate the DC power, thereby avoiding the influence of infrared light in the environment on the full paper detection of the shredder. For example, the infrared receiving unit 141 can be an infrared receiving tube.

[0087] Based on the above embodiments, optionally, refer to Figure 8The rectifier and voltage regulator unit 142 includes: a third resistor R8, a first capacitor C1, a first diode D1, a second diode D2, a fourth resistor R9, and a second capacitor C2.

[0088] The first terminal of the third resistor R8 is connected to the infrared receiving unit 141; the second terminal of the third resistor R8 is grounded; the first terminal of the first capacitor C1 is connected to the first terminal of the third resistor R8; the second terminal of the first capacitor C1 is connected to the anode of the first diode D1; the cathode of the first diode D1 is connected to the control module 150; the anode of the second diode D2 is connected to the second terminal of the third resistor R8; the cathode of the second diode D2 is connected to the second terminal of the first capacitor C1; the first terminal of the fourth resistor R9 is connected to the control module 150; the second terminal of the fourth resistor R9 is connected to the second terminal of the third resistor R8; the second capacitor C2 and the fourth resistor R9 are connected in parallel.

[0089] Specifically, the first capacitor C1 filters the DC power generated by the infrared receiving unit 141, allowing only the AC power generated by the infrared receiving unit 141 to pass through, thereby preventing infrared radiation in the environment from causing the infrared receiving unit 141 to conduct and generate false alarms, and reducing the impact of infrared radiation in the environment on the full paper detection of the paper shredder.

[0090] This invention also provides a paper shredder. Figure 9 This is a schematic diagram of a paper shredder provided in an embodiment of the present invention. (Refer to...) Figure 9 The paper shredder 20 includes the paper shredder full paper detection device 10 provided in any of the above embodiments. The paper shredder 20 provided in this embodiment has the beneficial effects of the paper shredder full paper detection device 10 provided in any of the above embodiments, which will not be elaborated further here.

[0091] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0092] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A full-paper detection device for a paper shredder, characterized in that, include: The system includes a detection module, a switch module, an infrared transmitting module, an infrared receiving module, and a control module. The detection module is used to generate a weight detection signal and trigger the switch module through the weight detection signal when the weight of paper scraps in the paper tube of the shredder reaches a preset threshold. The switch module is communicatively connected to the detection module; the switch module is located at the bottom of the paper tube slot of the shredder; the switch module is used to control the infrared emitting module to turn on when the weight detection signal is received; The infrared emitting module and the shredder's chip discharge port are located on the same plane; the infrared emitting module is used to generate infrared rays; The infrared receiving module and the infrared transmitting module are disposed on the same plane; the infrared receiving module is connected to the control module; the infrared receiving module is used to generate a height detection signal; The control module is used to determine whether the paper shredder tube is full of paper based on the height detection signal; The detection module includes: a cover plate, a transmitting element, and at least one elastic element; One end of the elastic element is fixed inside the paper tube of the shredder; the other end of the elastic element is connected to the cover plate; there is a gap between the cover plate and the bottom surface of the paper tube of the shredder; the transmitting element is disposed on the side of the cover plate near the bottom surface of the paper tube of the shredder. The cover plate is used to hold paper scraps; the elastic element is used to support the cover plate and to trigger the switching module by the transmitting element when the weight of the paper scraps reaches a preset threshold; the transmitting element is used to generate a weight detection signal. The switching module includes: a signal receiving unit and a first switching unit; The power supply terminal of the signal receiving unit is connected to the power supply voltage; the ground terminal of the signal receiving unit is grounded; the output terminal of the signal receiving unit is connected to the first terminal of the first switching unit; the second terminal of the first switching unit is connected to the infrared emitting module; and the third terminal of the first switching unit is connected to the ground terminal of the signal receiving unit. The signal receiving unit is used to acquire the weight detection signal and generate a control signal based on the weight detection signal; the first switching unit is used to control the infrared emitting module to turn on based on the control signal.

2. The paper shredder full-paper detection device according to claim 1, characterized in that, The transmitting element includes a magnet.

3. The full-paper detection device for a paper shredder according to claim 1, characterized in that, The signal receiving unit includes a Hall element.

4. The paper shredder full-paper detection device according to claim 1, characterized in that, The first switching unit includes: a first switching resistor, a second switching resistor, and a first switching transistor; The first end of the first switching resistor is connected to the signal receiving unit; the second end of the first switching resistor is connected to the control terminal of the first switching transistor; the first end of the first switching transistor is connected to the infrared emitting module; the second end of the first switching transistor is grounded; and the second switching resistor is connected between the control terminal of the first switching transistor and the second end of the first switching transistor.

5. The paper shredder full-paper detection device according to claim 1, characterized in that, The infrared emitting module includes: an infrared emitting unit and a second switching unit; The first terminal of the infrared emitting unit is connected to the power supply voltage; the second terminal of the infrared emitting unit is connected to the first terminal of the second switching unit; the second terminal of the second switching unit is grounded; the control terminal of the second switching unit is connected to the power supply voltage; the second terminal of the second switching unit is also connected to the switching module. The second switching unit is used to control whether the infrared emitting unit generates infrared light.

6. The paper shredder full-paper detection device according to claim 5, characterized in that, The infrared emitting unit includes: a first resistor and an infrared emitting tube; The first end of the first resistor is connected to the power supply voltage; the second end of the first resistor is connected to the anode of the infrared emitting diode; and the cathode of the infrared emitting diode is connected to the second switching unit.

7. The paper shredder full-paper detection device according to claim 5, characterized in that, The second switching unit includes: a second resistor and a second switching transistor; The first terminal of the second switching transistor is connected to the infrared emitting unit; the second terminal of the second switching transistor is grounded; the control terminal of the second switching transistor is connected to the first terminal of the second resistor; the second terminal of the second resistor is connected to the switching module; and the second terminal of the second resistor is also connected to the power supply voltage.

8. The paper shredder full-paper detection device according to claim 1, characterized in that, Also includes: Modulation module; The modulation module is connected to the control module; the modulation module is also connected to the infrared emitting module. The control module is also used to generate a modulation signal; the modulation module is used to modulate the infrared rays emitted by the infrared emitting module according to the modulation signal.

9. The full-paper detection device for a paper shredder according to claim 8, characterized in that, The modulation module includes: a modulation switch and a modulation resistor; The first terminal of the modulation switch is connected to the infrared emitting module; the second terminal of the modulation switch is grounded; the control terminal of the modulation switch is connected to the control module; and the modulation resistor is connected between the control terminal of the modulation switch and the second terminal of the modulation switch.

10. The paper shredder full-paper detection device according to claim 8, characterized in that, The infrared receiving module includes: an infrared receiving unit and a rectification and voltage regulation unit; The first terminal of the infrared receiving unit is connected to the power supply voltage; the second terminal of the infrared receiving unit is connected to the first terminal of the rectifier and voltage regulator unit; the second terminal of the rectifier and voltage regulator unit is connected to the control module; and the third terminal of the rectifier and voltage regulator unit is grounded. The infrared receiving unit is used to generate an AC signal; the rectification and voltage regulation unit is used to rectify and regulate the AC signal to generate the height detection signal.

11. The paper shredder full-paper detection device according to claim 10, characterized in that, The infrared receiving unit includes an infrared receiving tube.

12. The paper shredder full-paper detection device according to claim 10, characterized in that, The rectifier and voltage regulator unit includes: a third resistor, a first capacitor, a first diode, a second diode, a fourth resistor, and a second capacitor; The first end of the third resistor is connected to the infrared receiving unit; the second end of the third resistor is grounded; the first end of the first capacitor is connected to the first end of the third resistor; the second end of the first capacitor is connected to the anode of the first diode; the cathode of the first diode is connected to the control module; the anode of the second diode is connected to the second end of the third resistor; the cathode of the second diode is connected to the second end of the first capacitor; the first end of the fourth resistor is connected to the control module; the second end of the fourth resistor is connected to the second end of the third resistor; the second capacitor and the fourth resistor are connected in parallel.

13. A paper shredder, characterized in that, Includes the paper shredder full paper detection device as described in any one of claims 1-12.

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