Triggering mechanism and automatic pencil sharpener thereof

Abstract

The utility model discloses a trigger mechanism and an automatic pencil sharpener thereof. The trigger mechanism comprises a fixing part. The triggering piece comprises a rotating shaft part, a pressing part and a plurality of triggering parts, the rotating shaft part is rotatably arranged on the fixing piece, the pressing part extends towards a switch of the automatic pencil sharpener from the peripheral side of the rotating shaft part, the triggering parts are arranged in the axial direction of the rotating shaft part at intervals, and the triggering parts protrude and extend from the peripheral side of the rotating shaft part; wherein the trigger part can be pushed by a knife rest of the automatic pencil sharpener, so that the trigger piece rotates around the rotating shaft part, and the switch is pressed by the pressing part. The triggering piece is provided with a plurality of triggering parts which are arranged at intervals in the axial direction of the rotating shaft part, all the triggering parts correspond to all the knife rests of the automatic pencil sharpener respectively, then the multiple knife rests can share one switch to be controlled through the triggering piece, the number of the switches can be reduced, and control over the automatic pencil sharpener is simplified.

Description

Technical Field

[0001] The present invention relates to the field of automatic pencil sharpeners, in particular to a trigger mechanism and an automatic pencil sharpener thereof. Background Art

[0002] The automatic pencil sharpener is a new type of stationery. When a pencil is inserted into the automatic pencil sharpener, the motor starts to work, the blade holder rotates, and the pencil starts to sharpen automatically, replacing the traditional hand-cranking method to rotate the blade holder to sharpen the pencil.

[0003] In the related art, some automatic pencil sharpeners are equipped with two or more blade holders to improve the working efficiency of the automatic pencil sharpener or enable the automatic pencil sharpener to be suitable for cutting pencils of different thicknesses. Each blade holder corresponds to an independent switch, and the rotation start and stop of each blade holder are controlled by independent switches, making the control of the automatic pencil sharpener more complicated. Summary of the Invention

[0004] An object of the present invention is to provide a trigger mechanism to simplify the control of the start and stop of the tool holder rotation.

[0005] Another object of the present invention is to provide an automatic pencil sharpener having the above-mentioned trigger mechanism to simplify the control of the automatic pencil sharpener.

[0006] To achieve at least one of the above objectives, the present invention adopts the following technical solution: a trigger mechanism, comprising: a fixing member; a trigger member, the trigger member comprising a rotating shaft portion, a pressing portion, and a plurality of trigger portions, the rotating shaft portion being rotatably disposed on the fixing member, the pressing portion extending from a circumferential side of the rotating shaft portion toward a switch of an automatic pencil sharpener, the plurality of trigger portions being spaced apart along the axial direction of the rotating shaft portion, the trigger portions protruding and extending from a circumferential side of the rotating shaft portion; wherein the trigger portion is pushed by a tool holder of the automatic pencil sharpener so that the trigger member rotates about the rotating shaft portion, causing the pressing portion to press the switch.

[0007] As a preference, the trigger mechanism further includes a reset member, which elastically connects the trigger member and the fixing member, so that the trigger member can rotate around the rotating shaft portion, so that the pressing portion releases the switch.

[0008] As a preferred embodiment, the trigger portion includes a connecting section and a contact section, the connecting section extends radially along the rotating shaft portion to connect the rotating shaft portion and the contact section, the contact section is suitable for being pushed by the tool holder to cause the trigger member to rotate around the rotating shaft portion, and the reset member elastically connects the contact section and the fixing member.

[0009] As a preferred embodiment, the reset member is a compression spring, the contact section has a groove, the groove is capable of accommodating the compression spring, one end of the compression spring abuts against the contact section, and the other end of the compression spring abuts against the fixing member, so that the trigger member rotates around the rotating shaft portion, causing the pressing portion to release the switch.

[0010] As a preference, the pressing portion and the triggering portion are respectively located on both sides of the rotating shaft portion in the radial direction.

[0011] As a preference, the trigger mechanism further includes a locking member, which is slidably disposed on the fixing member so that the locking member can be switched between a locked position and an unlocked position, and the locking member is suitable for resisting or separating from the trigger member to lock or unlock the trigger member.

[0012] As a preference, the locking member includes an extension portion and a locking portion, the extension direction of the extension portion is perpendicular to the extension direction of the rotating shaft portion of the trigger member, the locking portion is connected to the extension portion, and the extension direction of the locking portion is parallel to the extension direction of the rotating shaft portion; the locking member is suitable for sliding along the extension direction of the extension portion, so that the locking portion can detachably abut against each of the trigger portions.

[0013] As a preference, the extension portion of the locking member and the rotating shaft portion of the trigger member are arranged vertically opposite to each other; an avoidance groove is provided on the side of the extension portion facing the trigger portion, and a locking surface is defined on the surface of the extension portion facing the trigger portion, and the avoidance groove and the locking surface are arranged in sequence along the extension direction of the extension portion; an inner recess is provided on the side of the rotating shaft portion facing the extension portion, and an abutment surface is defined on the bottom surface of the inner recess; when the locking member is in the locking position, the locking surface is in contact with the abutment surface; when the locking member is in the unlocking position, the avoidance groove and the inner recess are vertically spaced apart.

[0014] To achieve at least one of the above purposes, the present invention adopts the following technical solution: an automatic pencil sharpener, comprising: a trigger mechanism as described above; a knife holder, the knife holder being capable of rotating and moving along the axial direction of the knife holder, a trigger portion of a trigger member of the trigger mechanism extending from the circumferential side of a rotating shaft portion toward the knife holder, so that the trigger portion is located below the knife holder; wherein the knife holder is capable of being pushed by a pencil to move along the axial direction of the knife holder, the knife holder being capable of abutting against the trigger portion, causing the trigger member to rotate about the rotating shaft portion; a switch, the switch being capable of controlling the start and stop of the rotation of the knife holder; and a drive assembly, the drive assembly being controlled by the switch, the drive assembly being connected to the knife holder, and capable of driving the knife holder to rotate.

[0015] In order to achieve at least one of the above purposes, the technical solution adopted by the present invention is: an automatic pencil sharpener, comprising: a trigger mechanism as described above; a waste box, which is detachably arranged on a fixing member, and when the waste box is installed on the fixing member, the waste box is able to abut against the extension portion of the locking member of the trigger mechanism to keep the locking member in the unlocked position; an elastic member, which elastically connects the fixing member and the locking member, and when the waste box is detached from the fixing member, the elastic member is able to keep the locking member in the locked position.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The trigger member has a plurality of trigger portions spaced apart along the axial direction of the rotating shaft, each trigger portion being able to correspond to a respective tool holder of the automatic pencil sharpener, so that the plurality of tool holders can be controlled by sharing a switch through the trigger member, which is beneficial to reducing the number of switches and simplifying the control of the automatic pencil sharpener. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of the trigger mechanism and the tool holder according to some embodiments of the present application.

[0019] Figure 2 It is a front perspective structural diagram of a trigger member according to some embodiments of the present application.

[0020] Figure 3 It is a back perspective structural diagram of a trigger member according to some embodiments of the present application.

[0021] Figure 4 It is a three-dimensional structural diagram of a locking member according to some embodiments of the present application.

[0022] Figure 5 Schematic diagram of a trigger mechanism according to some embodiments of the present application, wherein the locking member is in a locked position.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the locking member in the locking position according to some embodiments of the present application.

[0024] Figure 7 Schematic diagram of a trigger mechanism according to some embodiments of the present application, wherein the locking member is in the unlocked position.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the locking member in the unlocking position according to some embodiments of the present application.

[0026] Figure 9 1 is a diagram of the internal structure of an automatic pencil sharpener according to some embodiments of the present application.

[0027] In the figure: 1. trigger mechanism; 10. fixing member; 20. trigger member; 21. rotating shaft portion; 211. recessed portion; 212. abutting surface; 22. pressing portion; 23. trigger portion; 231. connecting section; 232. contact section; 2321. groove; 2322. protruding structure; 233. stop section; 30. reset member; 40. locking member; 41. extension portion; 411. avoidance groove; 412. locking surface; 42. locking portion; 43. reinforcing rib; 2. automatic pencil sharpener; 51. knife holder; 52. switch; 53. driving assembly. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present invention.

[0030] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0031] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct, contact, or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] A trigger mechanism 1, such as Figure 1-Figure 3The figure includes: a fixing member 10; a trigger member 20, the trigger member 20 including a shaft portion 21, a pressing portion 22 and a plurality of trigger portions 23, the shaft portion 21 is rotatably arranged on the fixing member 10, the pressing portion 22 extends from the circumference of the shaft portion 21 toward the switch 52 of the automatic pencil sharpener 2, and the plurality of trigger portions 23 are arranged at intervals along the axial direction of the shaft portion 21, and the trigger portions 23 protrude and extend from the circumference of the shaft portion 21; wherein the trigger portion 23 can be pushed by the tool holder 51 of the automatic pencil sharpener 2, so that the trigger member 20 rotates about the shaft portion 21, causing the pressing portion 22 to press the switch 52.

[0033] It should be understood that the trigger member 20 has a plurality of trigger portions 23 arranged at intervals along the axial direction of the rotating shaft portion 21. Each trigger portion 23 is respectively corresponding to a respective blade holder 51 of the pencil sharpener. Thus, multiple blade holders 51 can be controlled by sharing a switch 52 through the trigger member 20, which helps to reduce the number of switches 52 and simplify the control of the automatic pencil sharpener 2.

[0034] In some embodiments, as Figure 1 and Figure 2 As shown, the trigger mechanism 1 further includes a reset member 30, which elastically connects the trigger member 20 and the fixed member 10, enabling the trigger member 20 to rotate about the rotation axis 21, causing the pressing portion 22 to release the switch 52, and stopping the rotation of the blade holder 51. Specifically, when subjected to an external force, such as when a pencil is inserted into the blade holder 51, the blade holder 51 moves to push the trigger portion 23 of the trigger member 20, thereby overcoming the force of the reset member 30, causing the trigger member 20 to rotate about the rotation axis 21. The pressing portion 22 of the trigger member 20 then presses the switch 52, causing the blade holder 51 to begin rotating. Furthermore, when the external force is removed, such as when the pencil is pulled out, the force of the reset member 30 causes the trigger member 20 to rotate in the opposite direction until it returns to its original position, causing the pressing portion 22 to release the switch 52, and stopping the rotation of the blade holder 51.

[0035] In some embodiments, as Figure 2 and Figure 3As shown, the trigger portion 23 includes a connecting segment 231 and a contact segment 232. The connecting segment 231 extends radially along the rotation shaft portion 21, connecting the rotation shaft portion 21 and the contact segment 232. The contact segment 232 is adapted to be pushed by the tool holder 51 to rotate the trigger member 20 about the rotation shaft portion 21. The reset member 30 elastically connects the contact segment 232 and the fixed member 10. It should be understood that the driving force of the tool holder 51 acts on the contact segment 232. The connecting segment 231 extends radially to connect the rotation shaft portion 21 and the contact segment 232, which helps to increase the distance between the contact segment 232 and the rotation shaft portion 21. In other words, it increases the distance between the driving force of the tool holder 51 and the rotation shaft portion 21, thereby facilitating increased torque. This allows the trigger member 20 to rotate about the rotation shaft portion 21 with a relatively small driving force, causing the pressing portion 22 to press the switch 52, causing the tool holder 51 to begin rotating. It is worth mentioning that by providing the connecting section 231 to increase the torque, the trigger member 20 can be driven to rotate more effortlessly, making the automatic pencil sharpener 2 more suitable for use by young children with less strength.

[0036] In some embodiments, as Figure 2 As shown, the trigger portion 23 further includes a protruding structure 2322 . The protruding structure 2322 protrudes from the contact section 232 toward the blade holder 51 so as to abut against the blade holder 51 .

[0037] In some embodiments, as Figure 3 As shown, the reset member 30 is a compression spring, and the contact section 232 has a groove 2321. The groove 2321 accommodates the compression spring. One end of the compression spring abuts the contact section 232, and the other end of the compression spring abuts the fixed member 10, so that the trigger member 20 rotates about the rotation axis 21, causing the pressing portion 22 to release the switch 52. In other words, the elastic force of the compression spring acting on the contact section 232 causes the trigger member 20 to rotate about the rotation axis 21.

[0038] It should be understood that the groove 2321 accommodates the compression spring, making the structure of the trigger mechanism 1 more compact. The groove 2321 also serves as a limiter, which helps to reduce the possibility of the compression spring being skewed or twisted, thereby improving the stability of the trigger mechanism 1. It is worth mentioning that the compression spring is a standard part, which is easy to purchase and install, which helps to reduce production costs and improve production efficiency.

[0039] It is worth mentioning that the reset member 30 can also be implemented as a tension spring, a torsion spring, or an elastic material such as rubber, and this application does not impose any specific restrictions on this.

[0040] In some embodiments, as Figure 1-Figure 3As shown, the pressing portion 22 and the triggering portion 23 are respectively located on either side of the rotating shaft portion 21 in the radial direction. This allows the pressing portion 22, the rotating shaft portion 21, and the triggering portion 23 of the trigger member 20 to be arranged coplanarly or approximately coplanarly. As the trigger member 20 rotates about the rotating shaft portion 21, the pressing portion 22, the rotating shaft portion 21, and the triggering portion 23 can rotate within a relatively small space, making the structure of the trigger mechanism 1 more compact and reducing the overall size of the pencil sharpener, particularly the height of the pencil sharpener.

[0041] In some embodiments, as Figure 4-Figure 8 As shown, the trigger mechanism 1 also includes a locking member 40, which is slidably disposed on the fixing member 10 so that the locking member 40 can switch between a locked position and an unlocked position. The locking member 40 is suitable for contacting or separating from the trigger member 20 to lock or unlock the trigger member 20.

[0042] It should be understandable that Figure 7 and Figure 8 As shown, when the locking member 40 is in the unlocked position, the locking member 40 is separated from the trigger member 20, and the blade holder 51 is able to push the trigger portion 23, so that the trigger member 20 is suitable for rotating around the rotating shaft portion 21, and the pressing portion 22 of the trigger member 20 is able to press the switch 52, so that the blade holder 51 starts to rotate, or the trigger member 20 rotates in the opposite direction under the action of the reset member 30, and the pressing portion 22 of the trigger member 20 is able to release the switch 52, so that the blade holder 51 stops rotating, that is, the automatic pencil sharpener 2 can be used normally. Figure 5 and Figure 6 As shown, when the locking member 40 is in the locked position, the locking member 40 is able to abut against the trigger member 20, and the blade holder 51 cannot push the trigger portion 23, thereby preventing the trigger member 20 from rotating about the rotating shaft portion 21. The pressing portion 22 of the trigger member 20 is kept in a state of releasing the switch 52, which helps to prevent the trigger member 20 from pressing the switch 52 due to accidental touch, thereby improving the safety of the automatic pencil sharpener 2.

[0043] In some embodiments, as Figure 4 As shown, the locking member 40 includes an extension portion 41 and a locking portion 42. The extension direction of the extension portion 41 is perpendicular to the extension direction of the rotating shaft portion 21 of the trigger member 20. The locking portion 42 is connected to the extension portion 41. The extension direction of the locking portion 42 is parallel to the extension direction of the rotating shaft portion 21. The locking member 40 is suitable for sliding along the extension direction of the extension portion 41, so that the locking portion 42 can detachably abut against each trigger portion 23.

[0044] It should be understandable that Figure 5-Figure 8As shown, the trigger portions 23 are spaced apart along the axial direction of the rotating shaft portion 21, and the locking portion 42 of the locking member 40 is parallel or approximately parallel to the rotating shaft portion 21, so that the locking portion 42 is suitable for abutting against each trigger portion 23; the extension portion 41 of the locking member 40 is perpendicular or approximately perpendicular to the rotating shaft portion 21, that is, the extension portion 41 of the locking member 40 is perpendicular or approximately perpendicular to the locking portion 42, and then when the locking member 40 slides along the extension direction of the extension portion 41, the locking portion 42 is able to synchronously abut or separate from each trigger portion 23.

[0045] It is worth mentioning that the extension portion 41 and the locking portion 42 of the locking member 40 are perpendicular or approximately perpendicular, which simplifies the movement trajectory of the locking member 40 while ensuring that the locking portion 42 is suitable for abutting against the trigger portion 23, thereby making the locking operation of the locking member 40 more reliable.

[0046] In some embodiments, as Figure 4 As shown, the locking member 40 also has a reinforcing rib 43, which is located at the corner of the extension portion 41 and the locking portion 42, so as to connect the extension portion 41 and the locking portion 42, which is beneficial to improve the connection strength between the extension portion 41 and the locking portion 42 and improve the structural reliability of the locking member 40.

[0047] In some embodiments, as Figure 8 As shown, the trigger portion 23 of the trigger member 20 further includes a stop segment 233. The stop segment 233 extends from the contact segment 232 of the trigger portion 23 toward a side away from the connecting segment 231. The stop segment 233 is adapted to abut against the locking portion 42 of the locking member 40. It should be understood that the locking portion 42 of the locking member 40 can detachably abut against the stop segment 233, which helps prevent the locking portion 42 from interfering with the reset member 30 and helps prevent the locking member 40 from interfering with the rotation of the trigger member 20.

[0048] In some embodiments, as Figure 3 、 Figure 4 and Figure 6 As shown, the extension portion 41 of the locking member 40 and the rotating shaft portion 21 of the trigger member 20 are arranged vertically opposite to each other; an avoidance groove 411 is provided on the side of the extension portion 41 facing the trigger portion 23, and a locking surface 412 is defined on the surface of the extension portion 41 facing the trigger portion 23. The avoidance groove 411 and the locking surface 412 are arranged in sequence along the extension direction of the extension portion 41; an inner recess 211 is provided on the side of the rotating shaft portion 21 facing the extension portion 41, and the bottom surface of the inner recess 211 is defined by a contact surface 212.

[0049] Specifically, such as Figure 5 and Figure 6As shown, when the locking member 40 is in the locked position, the locking portion 42 of the locking member 40 abuts against the trigger portion 23 of the trigger member 20, and the locking surface 412 of the locking member 40 fits against the abutting surface 212 of the trigger member 20, thereby further improving the locking effect of the locking member 40 and improving the safety of the automatic pencil sharpener 2. Figure 7 and Figure 8 As shown, when the locking member 40 is in the unlocked position, the locking portion 42 of the locking member 40 is separated from the trigger portion 23 of the trigger member 20, and the escape groove 411 and the inner recess 211 are vertically spaced apart, allowing the trigger member 20 to rotate relative to the locking member 40. It should be understood that the spaced-apart escape groove 411 and the inner recess 211 can reduce the vertical distance between the trigger member 20 and the locking member 40, thereby making the structure of the trigger mechanism 1 more compact.

[0050] An automatic pencil sharpener 2, such as Figure 9 As shown, the automatic pencil sharpener 2 comprises: the trigger mechanism 1 described above; a blade holder 51 capable of rotating and moving axially thereof; a trigger portion 23 of a trigger member 20 of the trigger mechanism 1 extending from the circumference of the rotating shaft portion 21 toward the blade holder 51, such that the trigger portion 23 is located below the blade holder 51; wherein the blade holder 51 can be pushed by a pencil to move axially thereof, the blade holder 51 abutting against the trigger portion 23, causing the trigger member 20 to rotate about the rotating shaft portion 21; a switch 52 capable of controlling the start and stop of the rotation of the blade holder 51; and a drive assembly 53 controlled by the switch 52, connected to the blade holder 51, capable of driving the blade holder 51 to rotate. It should be understood that any blade holder 51 used in the automatic pencil sharpener 2 can be used to rotate the trigger member 20 about the rotating shaft portion 21 by pushing the corresponding trigger portion 23, thereby causing the pressing portion 22 of the trigger member 20 to press the switch 52, causing the blade holder 51 to start rotating and sharpen the pencil.

[0051] It is worth noting that the multiple blade holders 51 share a single switch 52 for control, thereby reducing the number of switches 52 and simplifying the structure of the drive assembly 53. This, in turn, reduces the space occupied by the switches 52 and the drive assembly 53 in the automatic pencil sharpener 2, thereby reducing the overall size of the automatic pencil sharpener 2. Furthermore, reducing the number of switches 52 also reduces the production cost of the automatic pencil sharpener 2.

[0052] An automatic pencil sharpener 2 comprises: the trigger mechanism 1 described above; a waste box detachably mounted on a fixing member 10, wherein when the waste box is mounted on the fixing member 10, the waste box abuts against an extension 41 of a locking member 40 of the trigger mechanism 1, thereby maintaining the locking member 40 in an unlocked position; and an elastic member elastically connecting the fixing member 10 and the locking member 40, wherein when the waste box is detached from the fixing member 10, the elastic member maintains the locking member 40 in a locked position.

[0053] That is, the blade holder 51 of the automatic pencil sharpener 2 can be normally started and stopped by the trigger member 20 only when the waste box is installed. When the waste box is removed, the blade holder 51 may be exposed to the outside world, and the locking member 40 can lock the trigger member 20 to prevent the blade holder 51 from being accidentally touched and causing the trigger member 20 to press the switch 52, thereby improving the safety of the automatic pencil sharpener 2.

[0054] The above describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and description merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A trigger mechanism, characterized in that: include: fixings; a trigger member, the trigger member comprising a rotating shaft portion, a pressing portion, and a plurality of trigger portions, the rotating shaft portion being rotatably disposed on the fixing member, the pressing portion extending from a circumferential side of the rotating shaft portion toward a switch of the automatic pencil sharpener, the plurality of trigger portions being spaced apart along an axial direction of the rotating shaft portion, and the trigger portions protrudingly extending from a circumferential side of the rotating shaft portion; The trigger portion is pushed by the blade holder of the automatic pencil sharpener, so that the trigger member rotates around the rotating shaft portion, causing the pressing portion to press the switch.

2. The trigger mechanism according to claim 1, characterized in that: The trigger mechanism further includes a reset member, which is elastically connected to the trigger member and the fixing member, so that the trigger member can rotate around the rotating shaft portion, so that the pressing portion releases the switch.

3. The trigger mechanism according to claim 2, characterized in that: The trigger portion includes a connecting section and a contact section, wherein the connecting section extends radially along the rotating shaft portion to connect the rotating shaft portion and the contact section, and the contact section is suitable for being pushed by the tool holder to cause the trigger member to rotate around the rotating shaft portion, and the reset member elastically connects the contact section and the fixing member.

4. The trigger mechanism according to claim 3, characterized in that: The reset member is a compression spring, and the contact section has a groove for accommodating the compression spring. One end of the compression spring abuts against the contact section, and the other end of the compression spring abuts against the fixing member, so that the trigger member rotates around the rotating shaft portion, causing the pressing portion to release the switch.

5. The trigger mechanism according to any one of claims 1 to 4, characterized in that: The pressing portion and the triggering portion are respectively located on two sides of the rotating shaft portion in a radial direction.

6. The trigger mechanism according to any one of claims 1 to 4, characterized in that: The trigger mechanism further includes a locking member, which is slidably disposed on the fixing member to switch the locking member between a locked position and an unlocked position. The locking member is adapted to abut or separate from the trigger member to lock or unlock the trigger member.

7. The trigger mechanism according to claim 6, characterized in that: The locking member includes an extension portion and a locking portion, the extension direction of the extension portion is perpendicular to the extension direction of the rotating shaft portion of the trigger member, the locking portion is connected to the extension portion, and the extension direction of the locking portion is parallel to the extension direction of the rotating shaft portion; the locking member is suitable for sliding along the extension direction of the extension portion, so that the locking portion can detachably abut against each of the trigger portions.

8. The trigger mechanism according to claim 7, characterized in that: The extension portion of the locking member and the rotating shaft portion of the trigger member are arranged opposite to each other in the vertical direction; an avoidance groove is provided on the side of the extension portion facing the trigger portion, and a locking surface is defined on the surface of the extension portion facing the trigger portion, and the avoidance groove and the locking surface are arranged in sequence along the extension direction of the extension portion; an inner recess is provided on the side of the rotating shaft portion facing the extension portion, and an abutment surface is defined on the bottom surface of the inner recess; when the locking member is in the locking position, the locking surface is in contact with the abutment surface; when the locking member is in the unlocking position, the avoidance groove and the inner recess are arranged at intervals in the vertical direction.

9. An automatic pencil sharpener, characterized in that: include: The trigger mechanism according to any one of claims 1 to 8; a knife holder capable of rotating and moving axially thereof, wherein a trigger portion of a trigger member of the trigger mechanism extends from a circumferential side of the rotating shaft portion toward the knife holder so that the trigger portion is located below the knife holder; wherein the knife holder is capable of being pushed by a pencil to move axially thereof, and the knife holder is capable of abutting against the trigger portion, causing the trigger member to rotate about the rotating shaft portion; A switch, the switch being capable of controlling the start and stop of the rotation of the tool holder; A driving component is controlled by the switch and is connected to the tool holder to drive the tool holder to rotate.

10. An automatic pencil sharpener, characterized in that: include: The trigger mechanism according to any one of claims 6 to 8; a waste box detachably mounted on a fixing member, wherein when the waste box is mounted on the fixing member, the waste box abuts against an extension of the locking member of the trigger mechanism, so that the locking member remains in an unlocked position; An elastic member elastically connects the fixing member and the locking member. When the waste box is separated from the fixing member, the elastic member can keep the locking member in the locking position.

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