Touch shutdown paper shredder

Abstract

The utility model provides a paper shredder with a touch shutdown function. The touch shutdown paper shredder comprises a surface cover, an induction coil, a paper inlet insert and a control unit, wherein the surface cover is provided with a paper inlet and a first annular groove which is positioned at the periphery of the paper inlet and is provided with an upward opening; the induction coil is embedded in the first annular groove; the paper inlet insert is detachably connected with the surface cover, and at least part of the paper inlet insert is pressed on the top of the induction coil; the control unit is electrically connected with the induction coil. The first annular groove is formed near the paper inlet, the induction coil is arranged in the first annular groove, and the induction coil is arranged at the position closer to the paper inlet, so that an induction area formed after the induction coil is electrified is closer to or at least partially coincides with limb parts such as fingers of a user which may be mistakenly contacted; the touch effect is more sensitive, and the safety is higher; the induction coil is pressed on the top of the surface cover through the paper inlet insert, and the paper inlet insert is detachably connected with the surface cover, so that the induction coil is convenient to replace and maintain.

Description

Technical Field

[0001] The present application relates to the technical field of paper shredders, and in particular to a touch-stop paper shredder. Background Art

[0002] For safety reasons, especially to prevent children from operating the paper by mistake and putting their fingers into the paper inlet, some of the paper shredders currently sold on the market are equipped with a touch-stop function.

[0003] Currently, a paper shredder that uses capacitive sensing technology to achieve a false-touch shutdown feature includes an induction coil and a printed circuit board (PCB). The induction coil is electrically connected to the PCB and is fixed to the bottom of the shredder's front cover. When energized, the induction coil generates an electric field. When a user's finger approaches, the capacitance of the electric field changes. The PCB, which is electrically connected to the induction coil, uses this capacitance change signal to determine whether the shredder needs to shut down, thus implementing the touch-to-shutdown feature.

[0004] However, during actual use, the paper shredders equipped with induction coils in the related art have defects such as induction delays causing shutdown delays when the user's fingers or other body parts touch the paper inlet or nearby of the cover, or sometimes no induction causing failure to shut down. In short, the touch sensing sensitivity of the paper shredders in the related art is relatively low. Utility Model Content

[0005] In view of the shortcomings of the existing methods, this application proposes a touch-stop shredder to solve the technical problems in the related art that the distance between the induction coil and the paper inlet is relatively far and the sensitivity of touch sensing needs to be improved.

[0006] The embodiment of the present application provides a touch-stop shredder, comprising:

[0007] The cover comprises a paper inlet and a first annular groove disposed on the periphery of the paper inlet and opening upward;

[0008] an induction coil, embedded in the first annular groove;

[0009] A paper inlet insert is detachably connected to the surface cover, and at least a portion of the paper inlet insert is pressed on the top of the induction coil;

[0010] A control unit is electrically connected to the induction coil.

[0011] Optionally, the paper inlet insert is provided with a plurality of fasteners around its circumference, and the surface cover is provided with a plurality of slots that cooperate with the fasteners.

[0012] Optionally, the paper inlet insert and the surface cover are provided with a fool-proof structure, and the fool-proof structure includes at least two staggered fasteners arranged on two opposite sides of the paper inlet insert.

[0013] Optionally, the paper inlet insert includes a pressing cover for pressing the induction coil into the first annular groove, and the fastener is provided on the pressing cover and extends along the axial direction of the paper inlet.

[0014] Optionally, the paper inlet insert also includes a limiting portion for limiting the pressure cover in the horizontal direction, the limiting portion is provided with a through slot extending along its axial direction and the limiting portion is inserted into the paper inlet, and the paper is used to enter the interior of the shredder from the through slot, and the pressure cover is formed by extending horizontally outward from one end of the limiting portion.

[0015] Optionally, a first guide surface is provided at the junction between the paper inlet and the first annular groove, and a second guide surface for cooperating with the first guide surface is provided at the junction between the limiting portion and the pressure cover.

[0016] Optionally, a depth of the first annular groove is smaller than a diameter of the induction coil.

[0017] Optionally, a plurality of groups of clamping ribs are provided in the first annular groove, and the clamping ribs are used to clamp and fix the induction coil in the first annular groove.

[0018] Optionally, a through hole for the signal line to pass through is provided on the surface cover, the through hole is communicated with the first annular groove, and a guiding inclined surface is provided on a side of the through hole facing the edge of the surface cover.

[0019] Optionally, the paper inlet insert is an integrally formed structure made using an injection molding process.

[0020] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application include: by opening a first annular groove near the paper inlet on the top of the face cover, the induction coil is arranged in the first annular groove. Compared with the related art, the induction coil is arranged at a position closer to the paper inlet and is located on the top surface of the face cover, relatively close to the upper part of the paper inlet and the upper surface of the face cover near the paper inlet, and relatively close to the user's fingers and other limbs that may be accidentally touched, so that the sensing area formed after the induction coil is energized is relatively close to or at least partially overlaps with the user's fingers and other limbs that may be accidentally touched, thereby making the touch sensing of the user's fingers and other limbs more sensitive, and being able to sensitively sense the user's fingers and other limbs that are accidentally touched and stop the machine, which can improve the safety of the shredder; at the same time, since the paper inlet insert and the induction coil are both located at the top of the face cover, and the paper inlet insert and the face cover are detachably connected, there is no need to remove the face cover from the shredder body during assembly, which makes it easier to replace and repair the induction coil.

[0021] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 A schematic cross-sectional view of a middle cover of a touch-stop shredder provided in an embodiment of the present application;

[0024] Figure 2 This is an embodiment of the present application Figure 1 A partial enlarged view of point A in the middle;

[0025] Figure 3 An exploded diagram of the cover, paper inlet insert, and induction coil of an embodiment of the present application;

[0026] Figure 4 This is a schematic structural diagram of the paper inlet insert and the induction coil of an embodiment of the present application;

[0027] Figure 5 This is an embodiment of the present application Figure 3 A partial enlarged view of point B in the middle;

[0028] Figure 6 This is a top view of an embodiment of the present application.

[0029] Description of reference numerals:

[0030] 100 - cover; 101 - paper inlet; 102 - first annular groove; 103 - second annular groove; 104 - slot; 105 - first guide surface; 106 - through hole;

[0031] 200-induction coil; 201-induction area;

[0032] 300 - paper inlet insert; 301 - pressure cover; 302 - limit portion; 303 - through groove; 304 - second guide surface;

[0033] 400-Card tendon;

[0034] 500-Fasteners. DETAILED DESCRIPTION

[0035] The following describes the embodiments of the present application in conjunction with the accompanying drawings. It should be understood that the embodiments described below in conjunction with the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0036] Those skilled in the art will understand that, unless otherwise stated, the terms "said" and "the" used herein may also include plural forms. It should be further understood that the term "including" used in the specification of this application refers to the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the implementation of other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or as "B", or as "A and B".

[0037] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0038] Research has found that in related art, the induction coil in the shredder is installed below the cover, far away from the paper inlet. As a result, the electric field generated by the induction coil (including the induction area) is mostly located below the cover, making it difficult to extend to the cover and above it, or the field strength extending to the induction area above the cover is weak. However, the user's fingers and other body parts can only touch the upper surface of the cover near the paper inlet or mistakenly touch the upper part of the paper inlet. As a result, the induction area of ​​the induction coil is far away from the area that the user's fingers and other body parts may accidentally touch (including the upper part of the paper inlet and the upper surface of the cover near the paper inlet). When the user's fingers or other body parts accidentally touch, it is difficult to generate a relatively stable capacitance change signal, resulting in the problem of insufficient touch sensitivity.

[0039] In order to solve the above problems, the present application provides a touch-stop shredder.

[0040] Reference Figures 1-6 A touch-stop shredder of the present application includes a cover 100, an induction coil 200, a paper inlet insert 300, and a control unit (not shown in the figure).

[0041] The cover 100 is provided with a paper inlet 101 and a first annular groove 102 located outside the paper inlet 101 and opening upward. The induction coil 200 is embedded in the first annular groove 102. A paper inlet insert 300 is detachably connected to the cover 100, with at least a portion of the insert 300 pressing against the top of the induction coil 200. A control unit is electrically connected to the induction coil 200.

[0042] In the embodiment of the present application, a first annular groove 102 with an upward opening is formed on the outer periphery of the paper inlet 101 on the cover 100 along the circumference of the paper inlet 101. The induction coil 200 is pressed and restrained in the first annular groove 102 by the paper inlet insert 300. The paper inlet insert 300 is detachably connected to the cover 100. The induction coil 200 is arranged at a position relatively close to the paper inlet 101 and is located on the top surface of the cover 100, relatively close to the upper part of the paper inlet 101 and the upper surface of the cover 100 near the paper inlet 101, and relatively close to the user's fingers or other body parts that may be accidentally touched. When the induction coil 200 is energized, the sensing area 201 formed is relatively close to or at least partially overlaps with the user's fingers or other body parts that may be accidentally touched. This makes the touch sensing of the user's fingers or other body parts more sensitive, and can sensitively sense the user's fingers or other body parts that are accidentally touched and shut down the shredder, thereby improving the safety of the shredder.

[0043] Moreover, since the induction coil 200 and the paper inlet insert 300 are both arranged on the top surface or upper surface of the cover 100 , they are more convenient to disassemble, and the induction coil 200 can be replaced or maintained without disassembling the cover 100 .

[0044] Optionally, the control unit can be a rigid circuit board, such as a PCB (Printed Circuit Board), or a flexible circuit board, such as an FPC (Flexible Printed Circuit), or any control structure that can achieve signal transmission. This application only uses the PCB as an example for the control unit.

[0045] Optionally, refer to Figure 2 、 Figure 3 as well as Figure 5 The width of the first annular groove 102 is slightly larger than the diameter of the induction coil 200 to facilitate installation of the induction coil 200. Furthermore, to ensure that the induction coil 200 is firmly pressed inside the first annular groove 102, the depth of the first annular groove 102 is optionally smaller than the diameter of the induction coil 200.

[0046] When the induction coil 200 is installed in the first annular groove 102, the induction coil 200 is exposed from the top surface of the first annular groove 102. When the paper inlet insert 300 is used to press the induction coil 200 into the first annular groove 102, the induction coil 200 is in close contact with the bottom of the first annular groove 102 and at least a portion of the paper inlet insert 300, firmly pressing the induction coil 200 into the first annular groove 102 and preventing the induction coil 200 from shaking within the first annular groove 102.

[0047] In one embodiment, the depth of the first annular groove 102 is 0-0.2 mm (excluding the lower limit of 0 mm and including the upper limit of 0.2 mm) less than the coil diameter. When the paper inlet insert 300 presses the induction coil 200 downward, the slight interaction force between the induction coil 200 and the paper inlet insert 300 can be used to press the induction coil 200 firmly into the first annular groove 102, while preventing any obstruction to the assembly of the paper inlet insert 300.

[0048] Optionally, refer to Figure 3 as well as Figure 5 A plurality of clamping ribs 400 are further provided in the first annular groove 102 , and the clamping ribs 400 are used to clamp and fix the induction coil 200 in the first annular groove 102 .

[0049] In the embodiment of the present application, the induction coil 200 is fixed in a clamping space formed by the side wall surface of each set of clamping ribs 400 and the bottom surface of the first annular groove 102, which limits the position of the induction coil 200 in the first annular groove 102, ensures that the induction coil 200 is arranged horizontally in the first annular groove 102, and prevents one end of the induction coil 200 from tilting up.

[0050] In a specific embodiment of the present application, multiple groups of clamping ribs 400 are spaced apart circumferentially around the first annular groove 102, and each group of clamping ribs 400 includes two clamping ribs 400 disposed opposite each other, with the gap between the two clamping ribs 400 being smaller than the diameter of the induction coil 200. Optionally, the gap between the two clamping ribs 400 is 0-0.2 mm (inclusive of a lower limit of 0 mm and an upper limit of 0.2 mm) smaller than the diameter of the induction coil 200. This ensures that the induction coil 200 is unlikely to escape from the gap within the clamping ribs 400, thereby securing the induction coil 200 within the first annular groove 102.

[0051] Reference Figure 3 、 Figure 4 as well as Figure 5 The paper inlet insert 300 is detachably connected to the surface cover 100, specifically including but not limited to screw connection, buckle connection, magnetic connection, interference fit, elastic deformation connection, etc.

[0052] Optionally, in order to facilitate assembly between the paper inlet inlet inlet 300 and the face cover 100, ensure the pressing strength of the paper inlet inlet inlet 300 on the induction coil 200, and reduce the probability of loosening at the connection between the paper inlet inlet inlet 300 and the face cover 100, the embodiment of the present application only uses the buckle connection between the paper inlet inlet inlet 300 and the face cover 100 as an example for explanation.

[0053] In an alternative embodiment, referring to Figure 4 as well as Figure 5A plurality of fasteners 500 are provided on the paper inlet insert 300 around its circumference, and a plurality of slots 104 are opened on the surface cover 100 to match with the fasteners 500.

[0054] In the embodiment of the present application, the paper inlet insert 300 and the cover are connected by fasteners 500 and corresponding slots 104, making it easy to remove the cover 100 from the paper inlet insert 300. The fasteners 500 are inserted into the slots 104 to achieve a snap-fit ​​lock, ensuring a tight connection between the paper inlet insert 300 and the cover 100.

[0055] In another optional embodiment (not shown in the figures), a plurality of fasteners 500 are provided on the surface cover 100 , and a plurality of slots 104 cooperating with the fasteners 500 are provided on the paper inlet insert 300 .

[0056] In order to ensure that the fastener 500 is fixed in the slot hole 104, a rib (not shown in the figure) is provided on the hole wall of the slot hole 104. The fastener 500 or the rib is elastic (or the rib and the fastener 500 are both elastic). The fastener 500 is used to be deformed after being squeezed by the rib and to engage with the rib, thereby realizing the clamping and fixing of the paper inlet insert 300 and the face cover 100.

[0057] Optionally, in order to prevent the paper inlet 101 insert 300 from being installed upside down, a foolproof structure is provided on the paper inlet insert 300 and the cover 100. The foolproof structure can ensure that the paper inlet 101 insert 300 can only be installed on the cover 100 in one direction.

[0058] In one embodiment of the present application, referring to Figure 2 The foolproof structure includes at least two staggered fasteners 500 arranged on opposite sides of the paper inlet insert 300, and at least two staggered slots 104 corresponding to the fasteners 500 are opened on the surface cover 100.

[0059] Reference Figure 4 as well as Figure 6 For the sake of convenience, we first define a virtual line located in the middle of the paper inlet insert 300 and extending in a direction parallel to the cover 100 as the center line. This center line divides the paper inlet insert 300 into two symmetrical parts, that is, the center line is also a symmetry axis of the paper inlet insert 300. Optionally, the center line can extend in a direction parallel to the length of the paper inlet insert 300 (see Appendix 1). Figure 6 The center line a is defined in FIG. 1 ), and the center line a can also extend perpendicular to the length direction of the paper inlet insert 300 (see FIG. 1 ). Figure 6The at least two staggered fasteners 500 refer to the fasteners 500 on the first side of the paper inlet insert 300 and the fasteners 500 on the second side of the paper inlet insert 300 being at different distances from the aforementioned midline. The slots 104 are positioned corresponding to the fasteners 500. When the paper inlet insert 300 is installed in the reverse direction (i.e., rotated 180° horizontally from the forward position), the staggered fasteners 500 cannot be aligned with the slots 104. This ensures that the paper inlet insert 300 can only be installed in one direction, preventing installation from being reversed.

[0060] In actual processing, at least two staggered fasteners 500 can be processed among a plurality of regularly spaced fasteners 500 to have a fastener 500 with a different arrangement rule from the other fasteners 500, thereby realizing the fool-proof design of the present application, so that the paper inlet insert 300 can only be installed in one direction.

[0061] In another optional embodiment of the present application, the foolproof structure can also be provided as a mounting member (not shown) located outside the first annular groove 102 on the cover 100, with a mating member (not shown) provided on the paper inlet insert 300, which mates with the mounting member. If only one mounting member is provided, or the mounting member is provided on only one side of the paper inlet insert 300, installation of the paper inlet insert 300 can be completed only by mating the mating member with the mounting member, thus preventing the paper inlet insert 300 from being installed upside down.

[0062] Reference Figure 3-Figure 5 The paper inlet insert 300 includes a pressing cover 301 for pressing the induction coil 200 into the first annular groove 102. The fastener 500 is provided on the pressing cover 301 and extends along the axial direction of the paper inlet 101.

[0063] The pressing cover 301 applies pressure to the induction coil 200 along the axial direction of the paper inlet 101 , so as to press and fix the induction coil 200 in the first annular groove 102 .

[0064] The width of the pressure cover 301 is wider than that of the first annular groove 102. The cover 100 also includes a second annular groove 103, located outside the first annular groove 102. The depth of the second annular groove 103 is less than that of the first annular groove 102, creating a step between the second annular groove 103 and the first annular groove 102. Optionally, the height of the step (the difference in height between the bottom surfaces of the second annular groove 103 and the first annular groove 102) is less than or equal to the diameter of the induction coil 200, and the thickness of the paper inlet insert 300 is less than the thickness of the cover 100 at the paper inlet 101. When the pressure cover 301 is inserted into the space between the second annular groove 103 and the top of the first annular groove 102, the induction coil 200 tightly abuts against the lower surface of the pressure cover 301, thereby firmly securing the induction coil 200 within the first annular groove 102.

[0065] Reference Figure 3-Figure 5 The paper inlet insert 300 further includes a limiting portion 302 for horizontally limiting the pressure cover 301. The limiting portion 302 defines a through slot 303 extending axially therethrough and is inserted into the paper inlet 101. The pressure cover 301 extends horizontally outward from one end of the limiting portion 302.

[0066] Optionally, the shape of the limiting portion 302 matches the shape of the paper inlet 101 , so that the outer surface of the limiting portion 302 fits with the inner edge of the paper inlet 101 .

[0067] In the embodiment of the present application, the limiting portion 302 is inserted into the paper inlet 101, and the outer surface of the limiting portion 302 is in contact with the inner edge of the paper inlet 101, thereby preventing the limiting portion 302 from shaking horizontally in the paper inlet 101. The pressure cover 301 is connected to the limiting portion 302, so that the pressure cover 301 is also restricted in the second annular groove 103 under the action of the limiting portion 302, preventing the pressure cover 301 from shaking horizontally. A through slot 303 is provided in the limiting portion 302, which runs through the axial direction thereof. This through slot 303 constitutes the actual paper inlet 101 of the shredder of the present application, and paper is fed into the shredder through this through slot 303.

[0068] Optionally, refer to Figure 3-Figure 5 A first guide surface 105 is provided at the junction of the paper inlet 101 and the first annular groove 102 , and a second guide surface 304 for cooperating with the first guide surface 105 is provided at the junction of the limiting portion 302 and the pressure cover 301 .

[0069] Since the through slot 303 in the limiting portion 302 serves as the actual paper inlet of the shredder of this application, paper is fed into the shredder through the through slot 303. By providing a second guide surface 304 at the junction of the limiting portion 302 and the pressure cover 301, a better guiding effect is played on the paper fed into the shredder.

[0070] The fasteners 500 can be fixed to the gland 301 or to the stopper 302. This application uses the example of fasteners 500 being fixed to the lower surface of the gland 301 and spaced apart along the circumference of the gland 301. The fasteners 500 extend downwardly along the axial direction of the paper inlet 101, and the slots 104 are formed at the bottom of the second annular groove 103 and communicate with the second annular groove 103.

[0071] Optionally, refer to Figure 3 To facilitate the connection of the PCB control board's signal lines to the power supply, the cover 100 is provided with a through hole 106 for the signal lines to pass through. Through hole 106 communicates with the first annular groove 102. A guiding slope is provided on one side of through hole 106 toward the edge of the cover 100, facilitating the signal lines' connection to the control unit through the cover 100.

[0072] In the embodiment of the present application, the paper inlet insert 300 is an integrally formed structure made using an injection molding process. Optionally, the paper inlet insert 300 can be injection molded in different colors to embellish the color matching of the entire machine and improve the appearance of the shredder.

[0073] From the perspective of injection molding, the paper inlet 101 of the cover 100 is located at the optimal position for the injection molding glue inlet, which is beneficial for the injection molding production of the cover 100 and improves the pass rate of the cover 100. Because the paper inlet insert 300 consists of a limiter 302 inserted into the paper inlet 101 and a pressure cover 301 covering a certain width of the periphery of the paper inlet 101, the connection between the pressure cover 301 and the limiter can perfectly cover the injection molding glue inlet point traces, effectively improving the appearance of the cover 100 while improving the pass rate of the cover 100.

[0074] In summary, when the control unit of the touch-stop shredder of the present application is powered on, the induction coil 200 generates an electrical signal, thereby generating a uniformly distributed electrostatic field near the paper inlet 101, forming a sensing area 201 near the paper inlet 101. When a user accidentally inserts a finger or other body part into the sensing area 201, the capacitance of the sensing signal area of ​​the paper inlet 101 of the cover 100 changes. The relevant circuits in the control unit make a judgment based on this change in capacitance, thereby realizing the touch-stop function.

[0075] The present application sets the induction coil 200 at a position relatively close to the paper inlet 101 and located on the top surface of the cover 100, relatively close to the upper part of the paper inlet 101 and the upper surface of the cover 100 near the paper inlet 101, and relatively close to the user's fingers or other body parts that may be accidentally touched. This makes the induction area 201 formed after the induction coil 200 is energized relatively close to or at least partially overlaps with the user's fingers or other body parts that may be accidentally touched. This makes the touch sensing of the user's fingers or other body parts more sensitive, and can sensitively sense the user's fingers or other body parts that are accidentally touched and shut down the shredder, which can improve the safety of the paper shredder.

[0076] Furthermore, the present application utilizes a paper inlet insert 300 to press the induction coil 200 into the first annular groove 102 surrounding the paper inlet 101. The paper inlet insert 300 and the cover 100 are connected by snap-fit ​​connections, facilitating the repair and replacement of the induction coil 200. The paper inlet insert 300 can be injection molded in different colors, allowing for intuitive identification of its outline and effectively enhancing the present application's appearance.

[0077] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems with specific embodiments. It should be noted that the following embodiments can refer to, draw on, or combine with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be repeated.

[0078] In the description of the present application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the exemplary directions or positional relationships shown in the accompanying drawings. They are for the convenience of describing or simplifying the description of the embodiments of the present application, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0079] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0080] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0081] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0082] The above is only part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the solution of the present application, other similar implementation methods based on the technical ideas of the present application also fall within the protection scope of the embodiments of the present application.

Claims

1. A paper shredder with touch-stop function, characterized in that: include: The cover includes a paper inlet and a first annular groove arranged at the periphery of the paper inlet and opening upward; an induction coil, embedded in the first annular groove; A paper inlet insert is detachably connected to the surface cover, and at least a portion of the paper inlet insert is pressed on the top of the induction coil; A control unit is electrically connected to the induction coil.

2. The touch-stop paper shredder according to claim 1, characterized in that: The paper inlet insert is provided with a plurality of fasteners around the circumference thereof, and the surface cover is provided with a plurality of slots matched with the fasteners.

3. The touch-stop paper shredder according to claim 2, characterized in that: The paper inlet insert and the surface cover are provided with an anti-fool structure, and the anti-fool structure includes at least two staggered fasteners arranged on two opposite sides of the paper inlet insert.

4. The touch-stop paper shredder according to claim 2, characterized in that: The paper inlet insert comprises a pressing cover for pressing the induction coil into the first annular groove, and the fastener is arranged on the pressing cover and extends along the axial direction of the paper inlet.

5. The touch-stop paper shredder according to claim 4, characterized in that: The paper inlet insert also includes a limiting portion for limiting the pressure cover in the horizontal direction. The limiting portion is provided with a through slot extending along its axial direction and is inserted into the paper inlet. The pressure cover is formed by horizontally extending outward from one end of the limiting portion.

6. The touch-stop paper shredder according to claim 5, characterized in that: A first guide surface is provided at the junction of the paper inlet and the first annular groove, and a second guide surface for cooperating with the first guide surface is provided at the junction of the limiting portion and the pressure cover.

7. The touch-stop paper shredder according to claim 1, characterized in that: The depth of the first annular groove is smaller than the diameter of the induction coil.

8. The touch-stop paper shredder according to claim 1, characterized in that: A plurality of clamping ribs are provided in the first annular groove, and the clamping ribs are used to clamp and fix the induction coil in the first annular groove.

9. The touch-stop paper shredder according to claim 1, characterized in that: The surface cover is provided with a through hole for the signal line to pass through, the through hole is communicated with the first annular groove, and a guiding inclined surface is provided on a side of the through hole facing the edge of the surface cover.

10. The touch-stop paper shredder according to claim 1, characterized in that: The paper inlet insert is an integrally formed structure made using an injection molding process.

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