CN216708879U - Pencil feeding trigger mechanism of full-automatic pencil sharpener - Google Patents

Abstract

The utility model provides a pencil feeding trigger mechanism of a full-automatic pencil sharpener, which comprises: the first sliding block and the second sliding block have a first state that the sliding blocks slide towards opposite directions when the pen core is inserted and a second state that the sliding blocks slide towards the same direction after the pen core is extracted; the first linkage structure is arranged between the first sliding block and the second sliding block and is suitable for enabling the first sliding block and the second sliding block to keep the same speed to act; and the two sliding block elastic pieces are respectively propped against the corresponding first sliding block and the second sliding block. Therefore, the opening sizes of the first sliding block and the second sliding block can be guaranteed to be consistent, the consistency of the pen feeding state during pen sharpening is good, and the sharpened pen can be effectively prevented from deviating from the core and the like.

Description

Pencil feeding trigger mechanism of full-automatic pencil sharpener

Technical Field

The utility model relates to the technical field of stationery, in particular to a pen feeding trigger mechanism of a full-automatic pencil sharpener.

Background

The pencil sharpener is a common learning aid, and during pencil sharpening, one end of a pencil is inserted into a pencil channel, a motor is started, and the motor drives a hob to make planetary cutting motion around the pencil, so that a pencil point of the pencil is sharpened.

In order to cut pencils with different diameters, the size of a pencil inlet hole of the existing pencil sharpener is set to be larger, so that the central axis of the pencil inlet hole and the central axis of the pencil are prone to deviation, the sharpened pencil is prone to core deviation, and even core breakage can occur in serious cases.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defect that the pencil in the prior art is easy to deviate and even break, thereby providing a pencil feeding trigger mechanism of a full-automatic pencil sharpener which is not easy to deviate.

Therefore, the utility model provides a pen feeding trigger mechanism of a full-automatic pencil sharpener, which comprises a slide block assembly, a first linkage structure and a slide block elastic piece, wherein the slide block assembly comprises a first slide block and a second slide block, the slide block assembly is slidably arranged on a pencil sharpener body through the slide block elastic piece, a second insertion hole suitable for inserting a pencil lead is formed by enclosing the middle parts of the first slide block and the second slide block, and the first slide block and the second slide block have a first state of sliding towards opposite directions when the pencil lead is inserted and a second state of sliding towards the same direction after the pencil lead is extracted; the first linkage structure is arranged between the first sliding block and the second sliding block and is suitable for enabling the first sliding block and the second sliding block to keep the same speed to act; and the two sliding block elastic pieces are respectively abutted against the corresponding first sliding block and the second sliding block.

The first linkage structure includes: a gear rotatably mounted to the pencil sharpener body; the first rack and the second rack are respectively arranged on the first sliding block and the second sliding block and are arranged in parallel, and the first rack and the second rack are both connected with the gear in a meshed mode.

The first linkage structures are divided into two groups, and the two groups of the first linkage structures are respectively arranged on two sides of the first sliding block or the second sliding block in the moving direction.

The hob cutter also comprises a microswitch and an action rod, wherein the microswitch is connected with the hob cutter motor; and a second linkage structure is arranged between the action rod and the first sliding block or the second sliding block, and the action rod has an initial state separated from the micro switch and a trigger state for driving the micro switch to be turned on when the pen core is inserted so as to enable the hob motor to work.

The pencil sharpener body is provided with a first shell, a second shell and a third shell, wherein the first shell, the second shell and the third shell are sequentially arranged from top to bottom, the first shell, the second shell and the third shell are used for installing the hob assembly, the microswitch is arranged in the third shell, the action rod penetrates through the second shell, and the upper end and the lower end of the action rod respectively extend to the first shell and the third shell.

The second linkage structure comprises an ejector rod and a driving block, the ejector rod is mounted on the pencil sharpener body in a vertically movable mode, and a third insertion hole is formed in the ejector rod; the driving block is connected with the first sliding block or the second sliding block and is suitable for being inserted into the third insertion hole, and the driving block is provided with a first inclined surface arranged on the upper portion and a second inclined surface arranged on the lower portion; when the initial state is switched to the trigger state, the second inclined surface abuts against the edge of the bottom wall of the third jack so as to drive the ejector rod to move downwards; when the trigger state is switched to the initial state, the first inclined surface abuts against the edge of the top wall of the third insertion hole so as to drive the ejector rod to move upwards.

The first limiting structure is arranged between the first shell and the sliding block assembly and is suitable for limiting the sliding block assembly to jump along the vertical direction, and the first limiting structure comprises a protruding block which is arranged on the top wall of the first shell or on the sliding block assembly and extends towards the opposite matching surface.

The inner side of the top wall of the first shell is also provided with limiting blocks positioned on two sides of the sliding direction of the sliding block assembly.

The technical scheme of the utility model has the following advantages:

1. according to the pencil feeding triggering mechanism of the full-automatic pencil sharpener, the first linkage structure is arranged between the first sliding block and the second sliding block, so that the first sliding block and the second sliding block keep the same speed to act, the opening sizes of the first sliding block and the second sliding block are ensured to be consistent, the consistency of pencil feeding states during pencil sharpening is good, and the sharpened pencil can effectively prevent the problems of core deviation and the like.

2. The utility model provides a pencil feeding triggering mechanism of a full-automatic pencil sharpener, wherein a first linkage structure comprises a gear, a first rack and a second rack, the first rack and the second rack are respectively arranged on a first sliding block and a second sliding block and are arranged in parallel, the first rack and the second rack are both meshed and connected with the gear, and the gear and the rack are arranged to keep the movement speeds of the first sliding block and the second sliding block consistent.

3. The pen feeding trigger mechanism of the full-automatic pencil sharpener further comprises a microswitch and an action rod, the microswitch is connected with the hob motor, a second linkage structure is arranged between the action rod and the first sliding block or the second sliding block, the second linkage structure has an initial state separated from the microswitch and a trigger state for driving the microswitch to be started when a pencil lead is inserted so as to enable the hob motor to work, and therefore automatic operation is achieved, and the full-automatic pencil sharpener is more convenient for people to use.

4. According to the pen feeding trigger mechanism of the full-automatic pencil sharpener, the microswitch is arranged in the third shell, the action rod penetrates through the second shell, and the upper end and the lower end of the action rod respectively extend into the first shell and the third shell. Compared with the mode that the micro switch in the prior art is arranged in the first shell and needs to be connected with the motor of the third shell through a long lead, the hidden trouble existing in lead connection is eliminated, the safety is higher, and the micro switch is more durable.

5. The utility model provides a pen feeding trigger mechanism of a full-automatic pencil sharpener, wherein a second linkage structure comprises an ejector rod and a driving block, the ejector rod is provided with a third jack, the driving block is connected with a first sliding block or a second sliding block and is suitable for being inserted into the third jack, the driving block is provided with a first inclined surface arranged on the driving block and a second inclined surface arranged below the driving block, when the driving block moves in a transverse reciprocating mode, the ejector rod can be driven to move upwards and downwards through the first inclined surface and the second inclined surface respectively, and the ejector rod and the driving block have the advantage of simple structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a perspective view of a fully automatic pencil sharpener of the present invention;

FIG. 2 is a first cross-sectional view of FIG. 1;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

FIG. 4 is a perspective view of a portion of the range adjustment assembly;

FIG. 5 is a schematic diagram of the exploded structure of FIG. 4;

FIG. 6 is a schematic view of the assembly of the first ratchet, the second ratchet, the cam and the ratchet elastic member;

FIG. 7 is a cross-sectional view of the alignment sleeve;

FIG. 8 is a cross-sectional view of the first ratchet and the position sleeve;

FIG. 9 is a perspective view of FIG. 1 with the housing removed;

FIG. 10 is a perspective view of FIG. 9 with the cartridge and cover removed;

FIG. 11 is a perspective view of the advancement trigger mechanism;

FIG. 12 is a top view of FIG. 11;

FIG. 13 is a second cross-sectional view of FIG. 1;

FIG. 14 is an enlarged view of portion B of FIG. 13;

fig. 15 is a perspective view of the first housing;

fig. 16 is a perspective view of the cartridge feed mechanism;

FIG. 17 is a perspective view of FIG. 16 with the lower shell removed;

fig. 18 is a schematic diagram of the exploded structure of fig. 17.

Description of reference numerals: 1. a pencil sharpener body; 2. a pen inlet channel; 3. a cam; 4. a drive face; 5. an adjustment button; 6. a positioning sleeve; 7. a first through hole; 8. a third ratchet; 9. a blocking surface; 10. a guide slope; 11. a first ratchet wheel; 12. a second ratchet wheel; 13. a first ratchet; 14. a second ratchet; 15. a ratchet elastic member; 16. a baffle plate; 17. positioning a groove; 18. positioning blocks; 19. a notch; 20. an indicator; 21. a connecting rod; 22. a second through hole; 23. a first jack; 24. inserting a rod; 25. an indicating elastic member; 26. a clamping hole; 27. buckling; 28. a stopper; 29. a tool holder; 30. a push rod; 31. a push button switch; 32. a top block; 33. hobbing cutters; 34. a hob motor; 35. a top block elastic member; 36. a first slider; 37. a second slider; 38. a slider elastic member; 39. a second jack; 40. a gear; 41. a first rack; 42. a second rack; 43. a microswitch; 44. an action lever; 45. a first housing; 46. a second housing; 47. a third housing; 48. a top rod; 49. a third jack; 50. a drive block; 51. a first inclined plane; 52. a second inclined plane; 53. a bump; 54. a limiting block; 55. a rubber wheel; 56. a rotating shaft; 57. a helical gear; 58. a gear plate; 59. a transmission gear; 60. a turbine; 61. an upper box body; 62. a lower box body; 63. a driven gear assembly; 64. a drive shaft; 65. and (4) a housing.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

The embodiment provides a full-automatic pencil sharpener, including pencil sharpener body 1 to and locate the pencil sharpening mechanism, advance a trigger mechanism, refill conveying mechanism and the thick and thin adjustment mechanism of nib on the pencil sharpener body 1.

The pencil sharpener body 1 is provided with a first shell 45, a second shell 46 and a third shell 47, wherein the first shell 45 is used for installing a partial pencil triggering mechanism and a pencil core conveying mechanism, the second shell 46 is used for installing a pencil sharpening mechanism, and the third shell 47 is used for installing the hob motor 34.

The pencil sharpening mechanism comprises a hob assembly and a driving assembly suitable for driving the hob assembly to rotate, wherein the hob assembly comprises a hob head 29 and a hob 33 which is arranged on the hob head 29 and suitable for sharpening pencils. As shown in fig. 9 and 10, the driving assembly includes a hob motor 34, a driven gear assembly 63 and a driving shaft 64 linked with the tool holder 29, the hob motor 34 drives the tool holder 29 to rotate through the driven gear assembly 63 and the driving shaft 64, and a housing 65 adapted to shield the driven gear assembly 63 is provided between the driven gear assembly 63 and the tool holder 29.

The pen advance trigger mechanism, as shown in fig. 9-11, includes a slider assembly, a first linkage structure, a slider elastic member 38, a micro switch 43, and an actuating lever 44.

And the sliding block assembly comprises a first sliding block 36 and a second sliding block 37, the sliding block assembly is slidably mounted on the pencil sharpener body 1 through a sliding block elastic piece 38, the middle parts of the first sliding block 36 and the second sliding block 37 enclose a second insertion hole 39 suitable for inserting a pencil lead, and the first sliding block 36 and the second sliding block 37 have a first state of sliding towards opposite directions when the pencil lead is inserted and a second state of sliding towards the same direction after the pencil lead is extracted.

And a first linkage structure provided between the first slider 36 and the second slider 37 and adapted to operate the first slider 36 and the second slider 37 at the same speed. As shown in fig. 12, the first linkage structure includes: a gear 40 rotatably mounted to the pencil sharpener body 1; the first rack 41 and the second rack 42 are respectively arranged on the first slider 36 and the second slider 37, and are arranged in parallel, and the first rack 41 and the second rack 42 are both meshed with the gear 40. In this embodiment, there are two sets of the first linkage structures, and the two sets of the first linkage structures are respectively disposed on two sides of the first sliding block 36 or the second sliding block 37 in the moving direction. A first limit structure suitable for limiting the slider assembly to jump along the vertical direction is arranged between the first housing 45 and the slider assembly, and the first limit structure comprises a convex block 53 which is arranged on the top wall of the first housing 45 or on the slider assembly and extends towards the opposite matching surface. As shown in fig. 15, the inner side of the top wall of the first housing 45 is further provided with a stopper 54 located at both sides of the sliding direction of the slider assembly.

The two slide block elastic pieces 38 respectively abut against the corresponding first slide block 36 and the second slide block 37, and are suitable for driving the slide blocks to reset.

And a microswitch 43 connected to the hob motor 34 and arranged in the third housing 47.

As shown in fig. 13 and 14, the actuating rod 44 is disposed through the second housing 46, and both upper and lower ends thereof extend into the first housing 45 and the third housing 47, respectively. A second linkage structure is arranged between the action rod 44 and the first slide block 36 or the second slide block 37, and the action rod 44 has an initial state of being separated from the micro switch 43 and a trigger state of driving the micro switch 43 to be turned on when a pen core is inserted so as to enable the hob motor 34 to work. The second linkage structure includes: a top rod 48 which is mounted on the pencil sharpener body 1 in a manner of moving up and down and is formed with a third insertion hole 49; a driving block 50 connected to the first slider 36 or the second slider 37 and adapted to be inserted into the third insertion hole 49, the driving block 50 having a first inclined surface 51 disposed at an upper side and a second inclined surface 52 disposed at a lower side; when the initial state is switched to the trigger state, the second inclined surface 52 abuts against the edge of the bottom wall of the third insertion hole 49 to drive the ejector rod 48 to move downwards; when the trigger state is switched to the initial state, the first inclined surface 51 abuts against the edge of the top wall of the third insertion hole 49 to drive the top rod 48 to move upwards

The cartridge feeding mechanism, as shown in fig. 16 to 18, includes: two rubber wheels 55 arranged on two rotating shafts 56 arranged in parallel, wherein the two rubber wheels 55 are suitable for clamping and driving the pen core to move along the direction of the pen inlet channel 2; the bevel gear 57 is sleeved on the rotating shaft 56 and linked with the rotating shaft; a gear plate 58 linked with the tool rest 29; the transmission gear 59 and the worm gear 60 are coaxially arranged, the transmission gear 59 is meshed with the gear disc 58, and the worm gear 60 is meshed with the bevel gear 57. The pen core conveying mechanism is arranged in the frame type box body, the box body comprises an upper box body 61 and a lower box body 62 which are buckled up and down, and the upper box body 61 and the lower box body 62 are enclosed to form an installation cavity suitable for installing the pen core conveying mechanism.

The pen tip thickness adjusting mechanism comprises a push rod assembly and a gear adjusting assembly as shown in figures 2 and 3.

The push rod assembly is movably arranged on the pencil sharpener body 1, the moving direction of the push rod assembly is the same as the direction of the pencil lead feeding channel 2, and one end of the push rod assembly is suitable for abutting against a pencil point. As shown in fig. 2, the push rod assembly includes: a stopper 28 slidably mounted on the carriage 29 and adapted to abut the nib; the push rod 30, the button switch 31 and the top block 32 are sequentially arranged from top to bottom, the top of the push rod 30 abuts against the stop block 28, the bottom of the push rod abuts against a button of the button switch 31, the top of the top block 32 abuts against the button switch 31, the bottom of the top block abuts against the cam 3, the button switch 31 is connected with a hob motor 34 for controlling the motion of a hob 33, and the hob motor 34 can be driven to be closed under the abutting acting force of the pen point; and an elastic member 35 adapted to apply an elastic force toward the top block 32 to press the top block against the cam 3.

The gear adjusting component is suitable for driving the push rod component to move, the gear adjusting component is provided with a cam 3 which is abutted to the other end of the push rod component, the cam 3 can rotate around the axial direction of the cam 3, and the cam 3 is provided with a plurality of driving surfaces 4 which are distributed on the outer edge and can be abutted to the push rod component, and the driving surfaces 4 are different from the distance between the rotating centers of the cam 3. The gear adjustment assembly further comprises: an adjustment button 5; the reversing structure is arranged between the adjusting button 5 and the cam 3 and is suitable for converting the linear motion of the adjusting button 5 into the rotary motion of the cam 3; and the indicating structure is used for indicating the gear position of the adjusting button 5.

The commutation structure, as shown in fig. 4-8, comprises: the positioning sleeve 6 is formed with a first through hole 7, the extending direction of the first through hole 7 is the same as the axial direction of the cam 3, a plurality of third ratchets 8 arranged at intervals are formed on the inner wall of the first through hole 7, each third ratchet 8 is provided with a blocking surface 9, and a guide inclined surface 10 which extends upwards from the bottom of each blocking surface 9 to the top of the blocking surface 9 of another adjacent third ratchet 8; the first ratchet wheel 11 can move axially along the first through hole 7 and is assembled with the adjusting button 5, a plurality of first ratchets 13 are formed at one end, away from the adjusting button 5, of the first ratchet wheel 11, and a positioning structure is arranged between the first ratchet wheel 11 and the positioning sleeve 6 and comprises a positioning groove 17 arranged on one side of the inner wall of the first through hole 7 of the first ratchet wheel 11 and the positioning sleeve 6 and a positioning block 18 arranged on the other side and matched with the positioning groove 17; the second ratchet wheel 12 is rotatably arranged in the first through hole 7 through a ratchet wheel elastic piece 15, one end of the second ratchet wheel 12 is connected with the cam 3, the other end of the second ratchet wheel is provided with a second ratchet wheel 14 which is correspondingly arranged with the plurality of first ratchet wheels 13, the second ratchet wheel 12 has a positioning state and a gear switching state, wherein in the positioning state, the top surface of the second ratchet wheel 14 is abutted against the first ratchet wheels 13, and the side surface of the second ratchet wheel is abutted against the blocking surface 9 of the third ratchet wheel 8; in the gear shift state, under the pressing force of the first ratchet wheel 11 and the elastic force of the ratchet elastic member 15, the second ratchet 14 crosses the blocking surface 9 of the third ratchet 8 and moves along the guide slope 10 to abut against the blocking surface 9 of another third ratchet 8; and a ratchet elastic member 15, one end of which abuts against the cam 3 and the other end of which abuts against the baffle 16, and which is adapted to apply an elastic acting force to the second ratchet 12 to move the second ratchet in a direction approaching the first ratchet 11. In this embodiment, the top surface of the second ratchet 14 is an inclined surface, and the bottom surface of the first ratchet 13 is an inclined surface adapted to the top surface of the second ratchet 14.

The indicating structure includes: a notch 19 formed on the operation surface of the adjustment button 5; and an indicator 20 linked with the second ratchet wheel 12 through a combination structure, wherein the indicator 20 is provided with a plurality of indicating marks opposite to the notches 19. The bonding structure includes: the connecting rod 21 is connected with the second ratchet wheel 12, the connecting rod 21 is arranged in a second through hole 22 in the middle of the first ratchet wheel 11 in a penetrating mode, and a first insertion hole 23 is formed in one end, close to the indicating piece 20, of the connecting rod 21; and the plug rod 24 is arranged on the indicating piece 20 and can be in adaptive plug connection with the first plug hole 23. And one end of the indicating elastic piece 25 is abutted against the top surface of the first ratchet wheel 11, and the other end of the indicating elastic piece 25 is abutted against the indicating piece 20. The adjusting button 5 is assembled with the first ratchet wheel 11 through a buckle structure, and the buckle structure comprises a clamping hole 26 arranged on one side of the adjusting button 5 and the first ratchet wheel 11, and a buckle 27 arranged on the other side and clamped with the clamping hole 26 in an adaptive mode.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims (8)

1. The utility model provides a full-automatic penknife advance a trigger mechanism which characterized in that includes:

the sliding block assembly comprises a first sliding block (36) and a second sliding block (37), the sliding block assembly is slidably mounted on the pencil sharpener body (1) through a sliding block elastic piece (38), a second insertion hole (39) suitable for inserting a pencil lead is formed by surrounding the middle parts of the first sliding block (36) and the second sliding block (37), the first sliding block (36) and the second sliding block (37) have a first state that the sliding blocks slide in opposite directions when the pencil lead is inserted, and a second state that the sliding blocks slide in the same direction after the pencil lead is extracted;

the first linkage structure is arranged between the first sliding block (36) and the second sliding block (37) and is suitable for enabling the first sliding block (36) and the second sliding block (37) to keep the same speed to act;

the two sliding block elastic pieces (38) are respectively abutted against the corresponding first sliding block (36) and the second sliding block (37).

2. The advance trigger mechanism of the fully automatic pencil sharpener of claim 1 wherein the first linkage structure comprises:

a gear (40) rotatably mounted to the pencil sharpener body (1);

the first rack (41) and the second rack (42) are respectively arranged on the first sliding block (36) and the second sliding block (37) and are arranged in parallel, and the first rack (41) and the second rack (42) are meshed with the gear (40) and are connected.

3. The pencil feeding trigger mechanism of the fully automatic pencil sharpener according to claim 1 or 2, wherein there are two sets of the first linkage structures, and the two sets of the first linkage structures are respectively arranged at two sides of the moving direction of the first slider (36) or the second slider (37).

4. The advance trigger mechanism of the fully automatic pencil sharpener of claim 1 further comprising:

the microswitch (43) is connected with the hob motor (34);

and a second linkage structure is arranged between the action rod (44) and the first sliding block (36) or the second sliding block (37), the action rod (44) has an initial state separated from the micro switch (43) and a trigger state for driving the micro switch (43) to be turned on when the pen core is inserted so as to enable the hob motor (34) to work.

5. The pencil feeding trigger mechanism of the full-automatic pencil sharpener according to claim 4, wherein the pencil sharpener body (1) comprises a first housing (45) suitable for mounting the sliding block assembly, a second housing (46) suitable for mounting the hob assembly and a third housing (47) suitable for mounting the hob motor (34), which are sequentially arranged from top to bottom, wherein the microswitch (43) is arranged in the third housing (47), the action rod (44) is arranged through the second housing (46), and the upper end and the lower end of the action rod respectively extend into the first housing (45) and the third housing (47).

6. The advance trigger mechanism of the fully automatic pencil sharpener of claim 4 wherein the second linkage structure comprises:

the ejector rod (48) is arranged at the top of the action rod (44) and is provided with a third insertion hole (49) in a molding mode;

a driving block (50) connected to the first slider (36) or the second slider (37) and adapted to be inserted into the third insertion hole (49), the driving block (50) having a first inclined surface (51) disposed at the upper side and a second inclined surface (52) disposed at the lower side;

when the initial state is switched to the trigger state, the second inclined surface (52) is abutted against the edge of the bottom wall of the third insertion hole (49) so as to drive the ejector rod (48) to move downwards;

when the trigger state is switched to the initial state, the first inclined surface (51) is abutted against the edge of the top wall of the third insertion hole (49) so as to drive the ejector rod (48) to move upwards.

7. The pencil feeding trigger mechanism of the full-automatic pencil sharpener according to claim 5, wherein a first limit structure suitable for limiting the vertical jumping of the slider assembly is arranged between the first housing (45) and the slider assembly, and the first limit structure comprises a bump (53) which is arranged on the top wall of the first housing (45) or the slider assembly and extends towards the opposite matching surface.

8. The trigger mechanism of the automatic pencil sharpener as claimed in claim 5, wherein the inner side of the top wall of the first housing (45) is further provided with a stop block (54) located at both sides of the sliding direction of the slider assembly.

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