Triggering device and time-delay pencil sharpening mechanism and automatic pencil sharpener applied by triggering device

Abstract

The utility model discloses a trigger device and a time-delay pencil sharpening mechanism and an automatic pencil sharpener applying the trigger device, the trigger device comprises an upper cover, two swing rods arranged in parallel, a trigger rod capable of moving up and down along the vertical direction relative to the upper cover, and a transmission piece capable of swinging up and down along the vertical direction relative to the upper cover, and the swing rod drives the trigger rod through the transmission piece. According to the trigger device provided by the utility model, by introducing the transmission part, when a pencil is fed, the transmission part transmits the motion of the swing rod to the trigger rod, so that the switching of the pencil feeding and discharging states is realized, the feedback force of the trigger rod is effectively reduced, and more stable and comfortable hand feeling experience is provided. The utility model further provides a time-delay pencil sharpening mechanism with the trigger device and an automatic pencil sharpener with the trigger device.

Description

Technical Field

[0001] The utility model relates to the technical field of electric pencil sharpeners, and more specifically to a trigger device and a time-delay pencil sharpening mechanism and an automatic pencil sharpener applied thereto. Background Art

[0002] The working steps of the automatic pencil sharpener can be roughly divided into the pen feeding stage, the pencil sharpening stage, the delayed pencil sharpening stage and the pencil retracting stage. In the pencil sharpening stage, the pencil is cut by the tool while being fed forward, and in the delayed pencil sharpening stage, the pencil is stopped from being fed forward and is cut by the tool to polish the surface of the pen tip smooth.

[0003] CN116330884A discloses an automatic short pen retracting device and an automatic pencil sharpener used therein, wherein the pen feed trigger assembly includes a pair of parallel swing rods, and the trigger portion on the swing rods swings in the vertical direction following the rotation of the swing rods. When the swing rods rotate, the trigger portion swings in the vertical direction, and during the swinging process, it abuts against the upper end of the fork rod, pushing the fork rod downward. In the above patent solution, the swing rod as a trigger structure of the trigger delay pencil sharpening mechanism has a strong feedback feel when in use, and further optimization is performed for this purpose. Summary of the invention

[0004] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model proposes a trigger device, which introduces a transmission member. When the pencil is advanced, the transmission member transmits the movement of the swing rod to the trigger rod to achieve the switching of the advancing and retracting states. This design effectively reduces the feedback force of the trigger rod and provides a smoother and more comfortable hand feeling experience.

[0005] The utility model also provides a time-delay pencil sharpening mechanism with the trigger device.

[0006] The utility model also provides an automatic pencil sharpener with the trigger device.

[0007] The technical solution adopted by the utility model is: to provide a trigger device, including an upper cover, two parallel swing arms, a trigger rod that can move up and down in a vertical direction relative to the upper cover, and a transmission member that can swing up and down in a vertical direction relative to the upper cover, and the swing arm drives the trigger rod through the transmission member.

[0008] After adopting the above structure, by introducing the transmission part, when the pencil is advanced, the pen body drives the swing rod to swing downward, and the transmission part can transmit the swinging motion to the trigger rod, which is used to switch the pen advancement assembly between the advancement and retraction states. This design can effectively reduce the feedback force of the trigger rod and provide a more stable and comfortable hand feeling experience.

[0009] According to an embodiment of the utility model, one of the rocker rod bodies extends outward to form an extension arm, and the first end of the transmission member abuts against the extension arm; when the pencil is advanced and drives the rocker rod to swing downward, the extension arm acts as a lever structure to tilt upward and drives the first end of the transmission member to tilt upward.

[0010] According to an embodiment of the present invention, the transmission member has a second end opposite to the first end, and the second end abuts against the trigger rod; and / or

[0011] The extension arm and the clamping portion on the swing rod are located on the same straight line; similarly, the transmission member acts as a lever structure, and when the first end of the transmission member tilts upward, the second end of the transmission member presses downward to drive the trigger rod to move downward.

[0012] According to an embodiment of the utility model, an elastic member is provided between the two swing rods, and the elastic member has an elastic tendency to keep the two swing rods in an initial state; and / or

[0013] The two swing arms are both provided with synchronous gears, and the two synchronous gears are meshed with each other; the setting of the synchronous gears enables the two swing arms to swing synchronously and in opposite directions; and / or

[0014] The two swing rods are both provided with a clamping portion, and the two clamping portions swing up and down along the vertical direction.

[0015] A time-delay pencil sharpening mechanism comprises any one of the trigger devices described above.

[0016] According to one embodiment of the utility model, the delayed pencil sharpening mechanism also includes a transmission rod, a motor, a gear set, a turntable, and a pen feeding assembly. The transmission rod is movably mounted with a sliding gear, and the sliding gear can move between a first position and a second position. In the first position, the sliding gear is meshed with the first steering gear of the gear set, and in the second position, the sliding gear is meshed with the second steering gear of the gear set.

[0017] According to an embodiment of the utility model, the time-delay pencil sharpening mechanism further comprises a transmission gear mounted on the upper cover, wherein the transmission gear is located between the transmission rod and the rotating disk and is used for transmitting the torsion of the transmission rod to the rotating disk.

[0018] According to one embodiment of the utility model, the delayed pencil sharpening mechanism also includes a delay block, a pen tip trigger rod, a first delay gear, a second delay gear and a push rod, the lower end of the pen tip trigger rod is connected to the first delay gear, one end of the push rod is against the inclined surface of the delay block, and the other end is connected to the sliding gear transmission.

[0019] According to an embodiment of the present invention, the delay block has a rack portion meshing with the second delay gear; and / or

[0020] The pen tip trigger rod drives the first delay gear to move downward, so that the first delay gear switches from a disengaged position to a meshed position with the second delay gear; and / or

[0021] The transmission rod is movably provided with a connecting sleeve, and the connecting sleeve abuts against the lower end of the sliding gear, and the upper end of the push rod abuts against the connecting sleeve.

[0022] An automatic pencil sharpener comprises any one of the trigger devices described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A three-dimensional diagram of the time-delay pencil sharpening mechanism in the embodiment of the utility model;

[0025] Figure 2 It is a cross-sectional view of the time-delay pencil sharpening mechanism in the embodiment of the utility model;

[0026] Figure 3 It is a partial structural diagram of the time-delay pencil sharpening mechanism in the embodiment of the utility model;

[0027] Figure 4 A three-dimensional diagram of a trigger device in an embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the trigger device in the embodiment of the utility model;

[0029] Figure 6 This is a structural diagram of the time-delay pencil sharpening mechanism in the embodiment of the utility model;

[0030] Figure 7 This is a structural schematic diagram of the lower half of the time-delay pencil sharpening mechanism in the embodiment of the utility model;

[0031] Figure 8 It is a three-dimensional diagram of the lower half of the time-delay pencil sharpening mechanism in the embodiment of the utility model;

[0032] Fig. 9 It is a bottom view of the lower half of the time-delay pencil sharpening mechanism in the embodiment of the utility model;

[0033] Fig.10 It is a cross-sectional view of the lower half of the time-delay pencil sharpening mechanism in the embodiment of the utility model;

[0034] Fig.11 It is a schematic diagram of the connection between the connecting sleeve and the ejector rod in the embodiment of the utility model.

[0035] Description of the numbers in the figure:

[0036] 1. Upper cover; 2. Swing rod; 3. Transmission member; 4. Trigger rod; 5. Elastic member; 6. Transmission rod; 7. Lower support frame; 8. Motor; 9. Sliding gear; 10. Gear set; 11. Tool holder; 12. Ejector rod; 13. Delay block; 14. Pen tip trigger rod; 15. Pen block; 16. First delay gear; 17. Second delay gear; 18. Connecting sleeve; 19. End sleeve; 20. Transmission gear; 21. Turntable; 22. Pen feed assembly;

[0037] 1a, upper support frame;

[0038] 2a, rod body; 2b, synchronous gear; 2c, clamping part; 2d, extension arm;

[0039] 3a, first end; 3b, second end;

[0040] 6a, gear part;

[0041] 8a, driving gear;

[0042] 10a, first steering gear; 10b, second steering gear; 10c, output gear;

[0043] 13a, inclined surface; 13b, rack portion;

[0044] 18a. Baffle portion. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. Embodiment 1

[0046] like Figure 1-11 As shown, in this embodiment, a trigger device is disclosed, including an upper cover 1, two parallel rocker arms 2, a trigger rod 4 that can move up and down in a vertical direction relative to the upper cover 1, and a transmission member 3 that can swing up and down in a vertical direction relative to the upper cover 1, and the rocker arm 2 drives the trigger rod 4 through the transmission member 3.

[0047] Furthermore, in the present embodiment, the upper cover 1 has a pen feed channel, through which the pencil enters the trigger device. The upper cover 1 is provided with an upper support frame 1a, and two rocker arms 2 are arranged in parallel on the upper support frame 1a, and the rocker arms 2 are arranged symmetrically with the pen feed channel as the center. The rocker arm 2 can rotate around its own axis relative to the upper support frame 1a, and a clamping portion 2c is formed in the middle of the rod body 2a of the rocker arm 2 extending toward the position close to the pen feed channel. When the pencil enters the pen feed channel, the pen tip contacts the clamping portion 2c, and drives the rocker arm 2 to swing downward. The vertical direction refers to the direction perpendicular to the bottom surface of the upper cover 1, which can also be regarded as the axial direction of the upper cover 1, or the direction parallel to the pen feed channel.

[0048] Furthermore, in this embodiment, one end of the two swing rods 2 is provided with a synchronous gear 2b, and the two synchronous gears 2b are meshed with each other. The setting of the synchronous gear 2b enables the two swing rods 2 to swing synchronously and in opposite directions. An elastic member 5 is provided between one of the swing rods 2 and the upper cover 1. The elastic member 5 is preferably a tension spring, which has an elastic tendency to keep the two swing rods 2 in the initial position. In the initial position, the clamping parts 2c on the two swing rods 2 are arranged horizontally.

[0049] Specifically, combined Figure 1 As shown, one of the swing rods 2 extends outwardly to form an extension arm 2d, and the first end 3a of the transmission member 3 abuts against the extension arm 2d. Preferably, the extension direction of the extension arm 2d is in the same straight line as the lateral extension direction of the clamping portion 2c relative to the rod body 2a, and the extension arm 2d is formed in the same line as the clamping portion 2c and extends in the opposite direction. The transmission member 3 has a second end 3b opposite to the first end 3a, and the second end 3b abuts against the trigger rod 4; when the pencil advances and drives the swing rod 2 to swing downward, the extension arm 2d acts as a lever structure to tilt upward and drives the first end 3a of the transmission member 3 to tilt upward. Similarly, the transmission member 3 acts as a lever structure. When the first end 3a of the transmission member 3 tilts upward, the second end 3b of the transmission member 3 presses downward and drives the trigger rod 4 to move downward.

[0050] Combination Figure 1-10As shown, in another embodiment, a time-delay pencil sharpening mechanism is disclosed, including the trigger device described in this embodiment. The time-delay pencil sharpening mechanism also includes a transmission rod 6, a motor 8, a gear set 10, a turntable 21, a pen feeding assembly 22, a transmission gear 20 installed on the upper cover 1, a delay block 13, a pen tip trigger rod 14, a first delay gear 16, a second delay gear 17 and a push rod 12. The transmission rod 6 is movably mounted with a sliding gear 9, and the sliding gear 9 can move between a first position and a second position. In the first position, the sliding gear 9 is meshed with the first steering gear 10a of the gear set 10, and in the second position, the sliding gear 9 is meshed with the second steering gear 10b of the gear set 10. The transmission gear 20 is located between the transmission rod 6 and the turntable 21, and is used to transmit the torsion of the transmission rod 6 to the turntable 21. The lower end of the pen tip trigger rod 14 is connected to the first delay gear 16, one end of the push rod 12 abuts against the inclined surface 13a of the delay block 13, and the other end is in transmission connection with the sliding gear 9. The delay block 13 has a rack portion 13b meshing with the second delay gear 17; the pen tip trigger rod 14 drives the first delay gear 16 to move downward, so that the first delay gear 16 switches from a disengaged position to a meshed position with the second delay gear 17; the transmission rod 6 is movably equipped with a connecting sleeve 18, and the connecting sleeve 18 abuts against the lower end of the sliding gear 9, and the upper end of the push rod 12 abuts against the connecting sleeve 18.

[0051] Furthermore, in this embodiment, a lower support frame 7 is also included, and the motor 8, the gear set 10, the push rod 12, the delay block 13, the first delay gear 16, and the second delay gear 17 are all installed on the lower support frame 7. The tool holder 11 is located between the upper support frame 1a and the lower support frame 7. The output shaft of the motor 8 is provided with a driving gear 8a, and the driving gear 8a is meshed with the gear set 10.

[0052] Further, the gear set 10 includes at least two meshing gears, and the rotation directions of each two meshing gears are opposite, that is, clockwise rotation and counterclockwise rotation. According to the different rotation directions, the multiple gears in the gear set 10 are divided into a first steering gear 10a and a second steering gear 10b, and the rotation directions of the first steering gear 10a and the second steering gear 10b are opposite. The driving gear 8a is meshed with a gear in the gear set 10. For the convenience of description, the gear in the gear set 10 used to drive the tool holder 11 to rotate coaxially is called the output gear 10c. In this embodiment, the output gear 10c belongs to the first steering gear 10a, and in other embodiments, the output gear 10c belongs to the second steering gear 10b. The output gear 10c is key-connected with the tool holder 11. The motor 8 transmits power to the tool holder 11 through the gear set 10, so that the tool holder 11 performs a rotational motion relative to the lower support frame 7.

[0053] Furthermore, in this embodiment, the first delay gear 16 is coaxially keyed with the output gear 10c, and the first delay gear 16 can move up and down relative to the gear. A pen-blocking block 15 is mounted on the tool holder 11, and the upper end of the pen tip trigger rod 14 is fixedly connected to the pen-blocking block 15, and the lower end passes through the lower end of the tool holder 11 and the output gear 10c, and is connected to the first delay gear 16. The second delay gear 17 is rotatably mounted on the lower part of the lower support frame 7, and the second delay gear 17 remains in mesh with the rack portion 13b on the delay block 13.

[0054] Furthermore, in this embodiment, the delay block 13 can make horizontal reciprocating motion relative to the lower support frame 7, and an inclined surface 13a is provided on the delay block 13. The top rod 12 is vertically arranged and can move up and down relative to the lower support frame 7. The lower end of the top rod 12 abuts against the surface of the delay block 13, and the upper end abuts against the end sleeve 19. The transmission rod 6 is vertically arranged, and a gear portion 6a is provided at its upper end, and a key is connected at the lower end to the sliding gear 9 and the end sleeve 19, wherein the sliding gear 9 can move axially relative to the transmission rod 6, and the connecting sleeve 18 is sleeved on the transmission rod 6 and is located between the end sleeve 19 and the sliding gear 9, and the end sleeve 19 is elastically mounted on the lower support frame 7.

[0055] Furthermore, a baffle portion 18a is formed on the outer periphery of the connecting sleeve 18 and extends outward horizontally, and the upper end of the push rod 12 abuts against the baffle portion 18a. The connecting sleeve 18 can move axially relative to the transmission rod 6.

[0056] Furthermore, in this embodiment, the upper cover 1 is provided with a rotating disk 21 and a pen feeding assembly 22, both of which are located at the lower part of the swing arm 2, wherein the rotating disk 21 is used to drive the pen feeding assembly 22 to rotate. External teeth are provided on the outer periphery of the rotating disk 21, and the transmission gear 20 is meshed with the external teeth and the gear portion 6a at the same time. The power route of the pen feeding assembly 22 is: the motor 8 drives the gear set 10 to rotate, the first steering gear 10a or the second steering gear 10b drives the transmission rod 6 to rotate through the sliding gear 9, the transmission rod 6 drives the rotating disk 21 to rotate through the transmission gear 20, and the rotating disk 21 drives the pen feeding assembly 22 to advance or withdraw the pen.

[0057] Combination Figure 1-10 As shown, in another embodiment, an automatic pencil sharpener is disclosed, comprising the above-mentioned time-delay pencil sharpening mechanism.

[0058] Furthermore, in another embodiment, the automatic pencil sharpener operates as follows:

[0059] In the initial state, the sliding gear 9 is meshed and connected with the first steering gear 10a, and the pen-feeding assembly 22 corresponds to the pen-retracting state. When the pencil is fed, the pen tip is inserted into the pen-feeding channel, and the pen tip abuts against the clamping part 2c, driving the two rocker arms 2 to swing downward synchronously. The extension arm 2d on one of the rocker arms 2 is tilted upward, and the extension arm 2d drives the first end 3a of the transmission member 3 to be tilted upward. Correspondingly, the second end 3b of the transmission member 3 is pressed downward to drive the trigger rod 4 to move downward. The lower end of the trigger rod 4 abuts against the upper end of the transmission rod 6, thereby driving the transmission rod 6 to move downward, and the transmission rod 6 drives the sliding gear 9 to move downward synchronously through the spring, and the sliding gear 9 switches from the position meshed with the first steering gear 10a to the position meshed with the second steering gear 10b, and the pen-feeding assembly 22 corresponds to the pen-feeding state. After that, the pencil feeding triggers the micro switch, and the control circuit receives the signal of the micro switch to make the motor 8 work, and the automatic pencil sharpener enters the pen feeding stage;

[0060] In the pen feeding stage, the driving gear 8a on the output shaft of the motor 8 drives the gear set 10 to work, the second steering gear 10b in the gear set 10 drives the transmission rod 6 to rotate, the transmission rod 6 drives the turntable 21 to rotate through the transmission gear 20, and the turntable 21 drives the pen feeding assembly 22 to work. The pen feeding assembly 22 clamps the pencil body and feeds the pencil toward the tool holder 11. At the same time, the output gear 10c in the gear set 10 drives the tool holder 11 to rotate, and the tool holder 11 rotates in the same direction as the turntable 21. After the pencil tip enters the tool holder 11, the automatic pencil sharpener enters the pencil sharpening stage;

[0061] During the pencil sharpening stage, the pencil is advanced and the tip is continuously cut by the tool holder 11 until the tip hits the pencil blocking block 15, and the tip drives the pencil blocking block 15 to move downward synchronously. The pencil blocking block 15 drives the first delay gear 16 downward through the tip trigger rod 14. Since the first delay gear 16 is key-connected to the output gear 10c, it always rotates synchronously with the output gear 10c during the pencil sharpening stage. The first delay gear 16 moves downward, switching from a disengaged position to an engaged position with the second delay gear 17, thereby enabling the output gear 10c to drive the second delay gear 17 to rotate through the first delay gear 16. The second delay gear 17 drives the delay block 13 to move horizontally by engaging with the rack portion 13b. During the movement of the delay block 13, its inclined surface 13a drives the push rod 12 to move upward, and the push rod 12 drives the connecting sleeve 18 to move upward through the baffle portion 18a, and the connecting sleeve 18 then drives the sliding gear 9 to move upward relative to the transmission rod 6. The sliding gear 9 switches from the position meshing with the second steering gear 10b to the position meshing with the first steering gear 10a, and the gear portion 61 of the transmission rod 6 drives the turntable 21 to rotate in the opposite direction, while the rotation direction of the tool holder 11 remains unchanged, that is, the tool holder 11 rotates in the opposite direction to the turntable 21. At this time, the pen feeding assembly 22 corresponds to the pen retracting state, thereby realizing the reversal of the pen feeding assembly 22. The automatic pencil sharpener enters the pen retracting stage;

[0062] In the pencil retracting stage, the pencil advancing assembly 22 continuously drives the pencil to move away from the knife holder 11 to realize the pencil retracting. After the pencil leaves the automatic pencil sharpener, under the action of the elastic member 5, the swing rod 2 automatically returns to the initial position.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0068] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A trigger device, characterized in that: It includes an upper cover, two parallel swing rods, a trigger rod that can move up and down in a vertical direction relative to the upper cover, and a transmission member that can swing up and down in a vertical direction relative to the upper cover. The swing rod drives the trigger rod through the transmission member.

2. A trigger device according to claim 1, characterized in that: One of the rocker rod bodies extends outward to form an extension arm, and the first end of the transmission member abuts against the extension arm.

3. A trigger device according to claim 2, characterized in that: The transmission member has a second end opposite to the first end, and the second end abuts against the trigger rod; and / or The extension arm and the clamping portion on the swing rod are located on the same straight line.

4. A trigger device according to claim 1, characterized in that: An elastic member is provided between the two swing rods; and / or The two swing arms are both provided with synchronous gears, and the two synchronous gears are meshed with each other; and / or The two swing rods are both provided with a clamping portion, and the two clamping portions swing up and down along the vertical direction.

5. A time-delay pencil sharpening mechanism, characterized in that: It comprises the trigger device described in any one of claims 1 to 4.

6. The time-delay pencil sharpening mechanism according to claim 5, characterized in that: It also includes a transmission rod, a motor, a gear set, a turntable, and a pen feed assembly. The transmission rod is movably mounted with a sliding gear, and the sliding gear can move between a first position and a second position. In the first position, the sliding gear is meshed with the first steering gear of the gear set, and in the second position, the sliding gear is meshed with the second steering gear of the gear set.

7. A time-delay pencil sharpening mechanism according to claim 6, characterized in that: It also includes a transmission gear installed on the upper cover, wherein the transmission gear is located between the transmission rod and the turntable and is used to transmit the torsion of the transmission rod to the turntable.

8. The time-delay pencil sharpening mechanism according to claim 6, characterized in that: It also includes a delay block, a pen tip trigger rod, a first delay gear, a second delay gear and a push rod. The lower end of the pen tip trigger rod is connected to the first delay gear, one end of the push rod is against the inclined surface of the delay block, and the other end is connected to the sliding gear.

9. The time-delay pencil sharpening mechanism according to claim 8, characterized in that: The delay block has a rack portion meshing with the second delay gear; and / or The pen tip trigger rod drives the first delay gear to move downward, so that the first delay gear switches from a disengaged position to a meshed position with the second delay gear; and / or The transmission rod is movably provided with a connecting sleeve, and the connecting sleeve abuts against the lower end of the sliding gear, and the upper end of the push rod abuts against the connecting sleeve.

10. An automatic pencil sharpener, characterized in that: It comprises the trigger device described in any one of claims 1 to 4.

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