Gear shifting trigger device and automatic pencil sharpener thereof

Abstract

The utility model discloses a gear-shifting triggering device and an automatic pencil sharpener thereof. The gear-shifting triggering device comprises a fixing part, a gear shifting part and a driving part, the reversing assembly is rotatably arranged on the fixing part, and the reversing assembly is suitable for moving in the axial direction of the reversing assembly so as to be matched with a forward rotation gear or a reverse rotation gear of the automatic pencil sharpener; the shifting fork rod is rotatably arranged on the fixing piece, and the shifting fork rod is suitable for moving in the axial direction of the shifting fork rod so that the shifting fork rod can abut against the reversing assembly, and the reversing assembly can be driven to move in the axial direction; the time delay part is connected to the shifting fork rod, the time delay part is suitable for synchronously rotating with the shifting fork rod, and the time delay part is suitable for moving in the axial direction of the shifting fork rod; and the locking piece is movably arranged on the fixing piece, so that the locking piece can separately abut against the time delay piece, and under the condition that the locking piece abuts against the time delay piece, the time delay piece stops rotating.

Description

Technical Field

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

[0002] An automatic pencil sharpener is a new type of stationery that combines both sharpening and automatic pencil advance and retraction functions. When a pencil is inserted into the sharpener, the motor starts to operate, causing the pen feed mechanism to advance the pencil inward while the blade holder rotates, thus starting the automatic sharpening process. Once the pencil is sharpened, the motor reverses its rotation, causing the pen feed mechanism to retract the pencil outward.

[0003] However, the conversion of the forward and backward pen operations is achieved by changing the direction of the motor shaft. During the transition between the forward and backward pen, the sudden stop and reversal of the motor shaft will cause the motor to overload instantly, which may damage the motor and affect the service life of the motor. Summary of the Invention

[0004] An object of the present invention is to provide a gear shift trigger device that can change the direction of the pen feeding mechanism while keeping the direction of the motor unchanged.

[0005] Another object of the present invention is to provide an automatic pencil sharpener that can achieve the conversion of the pen forward and backward operations while keeping the rotation direction of the motor unchanged.

[0006] To achieve at least one of the above purposes, the technical solution adopted by the present invention is: a gear shift trigger device, comprising: a fixed part; a reversing assembly, the reversing assembly being rotatably disposed on the fixed part, and the reversing assembly being suitable for moving along its own axial direction to cooperate with the forward gear or the reverse gear of the automatic pencil sharpener; a shift fork rod, the shift fork rod being rotatably disposed on the fixed part, and the shift fork rod being suitable for moving along its own axial direction so that the shift fork rod and the reversing assembly are abutted against each other to drive the reversing assembly to move axially; a delay member, the delay member being connected to the shift fork rod, the delay member being suitable for rotating synchronously with the shift fork rod, and the delay member being suitable for moving axially along the shift fork rod; a locking member, the locking member being movably disposed on the fixed part so that the locking member can detachably abut against the delay member, and the delay member can stop rotating under the condition that the locking member abuts against the delay member.

[0007] As a preference, the locking member includes a mounting portion and a locking portion, the mounting portion is sleeved on the fork rod so that the locking member is suitable for axial movement along the fork rod and for rotation relative to the fork rod, and the locking portion extends from the mounting portion toward the delay member so that the locking portion is located on the outer peripheral side of the delay member, and the locking portion is able to detachably abut against the delay member along the circumferential direction.

[0008] As a preference, the delay member includes a main body and a matching portion, the main body being sleeved on the fork rod so that the delay member is suitable for synchronous rotation with the fork rod and for axial movement along the fork rod, and at least a portion of the matching portion protrudes radially from the main body so as to be circumferentially arranged relative to the locking portion of the locking member.

[0009] As a preference, the mating portion has a mating surface, which extends radially along the main body portion and protrudes from the outer circumferential surface of the main body portion; the locking portion has a locking surface, which is circumferentially arranged opposite to the mating surface, and the locking surface is suitable for fitting with the mating surface so that the locking member abuts against the delay member.

[0010] As a preference, the mating portion further has a guide surface, which is capable of transitionally connecting the mating surface and the outer peripheral surface of the main body; the locking portion further has a guide surface, which is radially opposite to the guide surface, and the guide surface is suitable for abutting against the guide surface so that the delay member is suitable for rotating relative to the locking member.

[0011] As a preference, the fork rod has a boss portion protruding in the radial direction, and the locking member is located below the boss portion. The locking member is suitable for abutting against the boss portion along the axial direction of the fork rod. When the fork rod moves axially downward, the locking member is driven to move axially downward along the fork rod, so that the locking member is suitable for abutting against the delay member.

[0012] As a preferred embodiment, the gear shift trigger device also includes a first reset member, a second reset member and a third reset member, the first reset member and the second reset member are sleeved on the shift fork rod, the first reset member is capable of providing a vertical upward force to the shift fork rod so that the shift fork rod moves along its own axial direction; the second reset member is capable of providing a vertical upward force to the locking member so that the locking member moves along the axial direction of the shift fork rod; the third reset member elastically connects the delay member and the fixing member so that the delay member and the shift fork rod rotate synchronously around the axis of the shift fork rod.

[0013] As a preferred embodiment, the reversing assembly includes a rotating shaft, a reversing gear and a sleeve, the reversing gear is connected to the rotating shaft, the reversing gear is suitable for rotating synchronously with the rotating shaft, and the reversing gear is suitable for moving axially along the rotating shaft; the sleeve is connected to the rotating shaft, the sleeve is suitable for moving axially along the rotating shaft, and the sleeve is suitable for rotating relative to the rotating shaft, the sleeve and the reversing gear are axially offset from each other, thereby driving the reversing gear to move axially.

[0014] As a preferred embodiment, the shift fork rod is provided with a forward rotating surface and a reverse rotating surface protruding in the radial direction, the forward rotating surface and the reverse rotating surface are distributed in high and low positions along the axial direction of the shift fork rod, and the forward rotating surface and the reverse rotating surface are staggered in the circumferential direction, and the shift fork rod rotates or moves axially so that the forward rotating surface or the reverse rotating surface can offset the reversing assembly, driving the reversing assembly to move along its own axial direction.

[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 shift trigger device as described above; a driving assembly to drive the shift fork rod of the shift trigger device to move axially; a delay gear to drive the delay member and the shift fork rod of the shift trigger device to rotate synchronously, so that the shift fork rod drives the reversing assembly to move along its own axial direction; a forward gear and a reverse gear, the forward gear and the reverse gear are arranged up and down and rotate in opposite directions, and the forward gear and the reverse gear are suitable for respectively cooperating with the reversing assembly of the shift trigger device.

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

[0017] (1) Through the movement of the shift fork lever, the reversing assembly is controlled to cooperate with the forward gear or reverse gear of the automatic pencil sharpener, thereby changing the direction of the pen feeding structure while keeping the direction of the motor unchanged, so that the automatic pencil sharpener can realize the conversion of the pen forward and backward operation;

[0018] (2) The locking member abuts against the delay member, thereby dispersing the torque of the delay member on the shift fork rod, which helps the shift fork rod to move more smoothly along its own axial direction;

[0019] (3) The contact between the shaft sleeve and the shift fork rod can avoid direct contact and wear between the reversing gear and the shift fork rod, which is beneficial to extending the service life of the reversing gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the gear shift trigger device according to some embodiments of the present application.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the locking member according to some embodiments of the present application.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the delay element according to some embodiments of the present application.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the reversing assembly according to some embodiments of the present application.

[0024] Figure 5It is a schematic diagram of the three-dimensional structure of the reversing assembly and the forward gear according to some embodiments of the present application.

[0025] Figure 6 It is a cross-sectional schematic diagram of some embodiments of the present application in a state where the locking member and the delay member are not in contact with each other.

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the delay member rotating relative to the locking member according to some embodiments of the present application.

[0027] Figure 8 It is a cross-sectional schematic diagram of the rotation of the delay member relative to the locking member according to some embodiments of the present application.

[0028] Figure 9 It is a schematic diagram of the three-dimensional structure of the reversing assembly and the reversing gear according to some embodiments of the present application.

[0029] Figure 10 It is a three-dimensional structural diagram of the fork lever in the reset state according to some embodiments of the present application.

[0030] Figure 11 It is a cross-sectional schematic diagram of the locking member and the delay member in a state of abutting each other according to some embodiments of the present application.

[0031] Figure 12 It is a three-dimensional structural diagram of the fork lever and the locking member in the reset state according to some embodiments of the present application.

[0032] Figure 13 2 is a schematic diagram of the internal three-dimensional structure of an automatic pencil sharpener according to some embodiments of the present application.

[0033] In the figure: 1. shift trigger device; 10. fixing part; 20. reversing assembly; 21. rotating shaft; 22. reversing gear; 23. bushing; 30. shift fork rod; 31. forward rotation surface; 32. reverse rotation surface; 33. boss portion; 40. delay member; 41. main body; 411. outer peripheral surface; 42. matching part; 421. matching surface; 422. guide surface; 43. meshing part; 50. locking member; 51. mounting part; 52. locking part; 521. locking surface; 522. guide surface; 2. automatic pencil sharpener; 60. driving assembly; 70. delay gear; 81. forward rotation gear; 82. reverse rotation gear. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0037] 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.

[0038] A gear shift trigger device 1, such as Figures 1-12 As shown, it includes: a fixing member 10; a reversing assembly 20, which is rotatably provided on the fixing member 10 and is suitable for moving along its own axial direction to cooperate with the forward gear 81 or the reverse gear 82 of the automatic pencil sharpener 2; a shift fork rod 30, which is rotatably provided on the fixing member 10 and is suitable for moving along its own axial direction so that the shift fork rod 30 and the reversing assembly 20 are abutted against each other, thereby driving the reversing assembly 20 to move along the axial direction; a delay member 40, which is connected to the shift fork rod 30, the delay member 40 is suitable for rotating synchronously with the shift fork rod 30, and the delay member 40 is suitable for moving along the axial direction of the shift fork rod 30; a locking member 50, which is movably provided on the fixing member 10 so that the locking member 50 can detachably abut against the delay member 40. When the locking member 50 abuts against the delay member 40, the delay member 40 stops rotating.

[0039] It should be understood that the movement of the shift fork lever 30 controls the reversing assembly 20 to cooperate with the forward gear 81 or the reverse gear 82 of the automatic pencil sharpener 2, thereby changing the direction of the pen feeding mechanism while maintaining the motor's direction of rotation, thereby enabling the automatic pencil sharpener 2 to switch between forward and backward pen operations. Furthermore, maintaining the motor's direction of rotation simplifies motor control and helps avoid momentary motor overload caused by sudden motor shaft stops and reversals, thereby extending the motor's service life.

[0040] Furthermore, the locking member 50 abuts the time delay member 40, dispersing the torque exerted by the time delay member 40 on the shift fork lever 30, thereby facilitating smoother axial movement of the shift fork lever 30. It should be understood that the shift fork lever 30 is driven by the time delay member 40 to rotate synchronously with the time delay member 40; the shift fork lever 30 is also able to move axially, i.e., the shift fork lever is able to move axially relative to the fixed member 10 and the time delay member 40. Consequently, the shift fork lever 30 may be subject to torque from the time delay member 40 and axial friction from the fixed member 10.

[0041] If the locking member 50 is not provided, when the fork lever 30 rotates under the drive of the delay member 40 and moves along its own axial direction at the same time, the torque applied to the fork lever 30 may cause the fork lever 30 to be skewed or deviate radially, thereby causing the fork lever 30 to be pressed against the fixing member 10, resulting in an increase in the friction between the fork lever 30 and the fixing member 10, affecting the movement of the fork lever 30 along its own axial direction, and even causing the fork lever 30 and the fixing member 10 to become stuck or stuck.

[0042] In this embodiment, when the locking member 50 abuts the delay member 40, the delay member 40 stops rotating. Furthermore, the locking member 50 is movably disposed on the fixed member 10, thereby transmitting the torque of the delay member 40 to the fixed member 10. This helps prevent the torque of the delay member 40 from being transmitted to the shift fork lever 30, thereby reducing the risk of the shift fork lever 30 becoming skewed or deviating radially, thereby reducing the friction between the shift fork lever 30 and the fixed member 10, and allowing the shift fork lever 30 to move more smoothly along its own axial direction. Furthermore, when the locking member 50 is separated from the delay member 40, the delay member 40 can normally drive the shift fork lever 30 to rotate synchronously, so that the shift fork lever 30 drives the reversing assembly 20 to move axially.

[0043] In some embodiments, as Figure 2 and Figure 5 As shown, the locking member 50 includes a mounting portion 51 and a locking portion 52. The mounting portion 51 is sleeved on the fork rod 30 so that the locking member 50 is suitable for axial movement along the fork rod 30 and for rotation relative to the fork rod 30. The locking portion 52 extends from the mounting portion 51 toward the delay member 40 so that the locking portion 52 is located on the outer circumference of the delay member 40 and is able to detachably abut the delay member 40 along the circumferential direction.

[0044] It should be understandable that Figure 5As shown, the locking member 50 and the delay member 40 are both sleeved on the shift fork rod 30 and arranged axially along the shift fork rod 30, making the structure of the shift trigger device 1 more compact and facilitating a reduction in the overall size of the automatic pencil sharpener 2. Furthermore, the mounting portion 51 is clearance-fitted with the shift fork rod 30, allowing the mounting portion 51 to rotate relative to the shift fork rod 30 and minimizing the effect of the mounting portion 51 on the axial movement of the shift fork rod 30. Furthermore, the locking portion 52 of the locking member 50 extends from the mounting portion 51 toward the delay member 40. At least a portion of the locking portion 52 is located on the outer circumference of the delay member 40, adapted to abut against the delay member 40 along the circumferential direction, thereby stopping the rotation of the delay member 40.

[0045] In at least one embodiment, the extension direction of the locking portion 52 is parallel or approximately parallel to the axial direction of the fork rod 30, which helps to avoid interference between the locking portion 52 and the fork rod 30 and makes the structure of the shift trigger device 1 more compact.

[0046] In at least one embodiment, the fixing member 10 is provided with a groove or an opening, and the locking portion 52 of the locking member 50 is adapted to be installed and adapted to the groove or opening of the fixing member 10. Thus, through the limiting action of the fixing member 10, the locking member 50 is adapted to move along the axial direction of the shift fork rod 30. It should be understood that when the locking portion 52 abuts the delay member 40, the torque of the delay member 40 is transmitted to the fixing member 10 through the locking portion 52. At the same time, the fixing member 10 acts on the locking portion 52 to reduce the movement of the locking member 50 in directions other than the axial direction of the shift fork rod 30. This further reduces the influence of the mounting portion 51 on the axial movement of the shift fork rod 30, allowing the shift fork rod 30 to move more smoothly along its own axial direction.

[0047] In some embodiments, as Figure 3 and Figure 5 As shown, the delay member 40 includes a main body 41 and a mating portion 42. The main body 41 is mounted on the shift fork rod 30, so that the delay member 40 is suitable for synchronous rotation with the shift fork rod 30 and for axial movement along the shift fork rod 30. It should be understood that by having the main body 41 of the delay member 40 mounted on the shift fork rod 30, the structure of the shift trigger device 1 is made more compact, which helps to reduce the overall size of the automatic pencil sharpener 2. Furthermore, at least a portion of the mating portion 42 protrudes radially from the main body 41, allowing it to be circumferentially opposed to the locking portion 52 of the locking member 50. In other words, by the circumferential contact between the locking portion 52 and the mating portion 42, the locking member 50 is able to stop the rotation of the delay member 40.

[0048] In at least one embodiment, at least a portion of the fork rod 30 is provided with an external spline, and the main body 41 of the delay member 40 is provided with an internal spline adapted to the external spline, so that the delay member 40 is suitable for rotating relative to the fork rod 30 and moving axially along the fork rod 30.

[0049] In some embodiments, as Figure 2 As shown, the mating portion 42 has a mating surface 421 that extends radially along the main body 41 and protrudes from the outer circumferential surface 411 of the main body 41. The locking portion 52 has a locking surface 521 that is circumferentially disposed opposite the mating surface 421. The locking surface 521 is adapted to abut against the mating surface 421 to bring the locking member 50 into contact with the time delay member 40. It should be understood that the abutment of the locking surface 521 with the mating surface 421 facilitates a larger contact area between the locking portion 52 and the mating portion 42, allowing the locking member 50 to more reliably bear the torque from the time delay member 40, thereby improving the structural reliability and operational stability of the shift trigger device 1.

[0050] In some embodiments, as Figure 3 As shown, the mating portion 42 also has a guide surface 422, which is capable of transitionally connecting the mating surface 421 and the outer peripheral surface 411 of the main body 41; the locking portion 52 also has a guide surface 522, which is radially opposite to the guide surface 422, and the guide surface 522 is suitable for abutting against the guide surface 422, so that the delay member 40 is suitable for rotating relative to the locking member 50, which is beneficial to avoid a sudden change between the radial dimension of the outer peripheral surface 411 of the main body 41 of the delay member 40 and the radial dimension of the mating surface 421 of the mating portion 42, thereby reducing the risk of jamming of the delay member 40 during rotation relative to the locking member 50, and is beneficial to improving the smooth operation of the shift trigger device 1.

[0051] In some embodiments, as Figure 5 As shown, the fork lever 30 has a radially protruding boss portion 33, and the locking member 50 is located below the boss portion 33. The locking member 50 is adapted to abut against the boss portion 33 along the axial direction of the fork lever 30. Consequently, when the fork lever 30 moves axially downward, the locking member 50 is driven to synchronously move axially downward along the fork lever 30, so that the locking member 50 is adapted to abut against the time delay member 40. In other words, the boss portion 33 is adapted to abut against the mounting portion 51 of the locking member 50 along the axial direction, so that the fork lever 30 and the locking member 50 are adapted to synchronously move axially downward, thereby causing the locking portion 52 of the locking member 50 to be located on the outer circumference of the time delay member 40, and the locking surface 521 of the locking portion 52 to detachably abut against the mating surface 421 of the time delay member 40.

[0052] In some embodiments, the shift trigger device 1 further includes a first reset member, a second reset member, and a third reset member. The first reset member and the second reset member are sleeved on the fork rod 30. The first reset member is capable of providing a vertical upward force to the fork rod 30 so that the fork rod 30 moves along its own axial direction. The second reset member is capable of providing a vertical upward force to the locking member 50 so that the locking member 50 moves along the axial direction of the fork rod 30, and then the mounting portion 51 of the locking member 50 is capable of axially abutting against the boss portion 33 of the fork rod 30, so that the fork rod 30 and the locking member 50 are suitable for synchronous axial downward movement. The third reset member elastically connects the delay member 40 and the fixing member 10 so that the delay member 40 and the fork rod 30 rotate synchronously around the axis of the fork rod 30. In at least one embodiment, the first reset member and the second reset member are implemented as compression springs, and the third reset member is implemented as a tension spring.

[0053] In some embodiments, as Figure 4 As shown, the reversing assembly 20 includes a rotating shaft 21, a reversing gear 22 and a sleeve 23. The reversing gear 22 is connected to the rotating shaft 21, and is suitable for rotating synchronously with the rotating shaft 21, and is suitable for moving axially along the rotating shaft 21; the sleeve 23 is connected to the rotating shaft 21, and is suitable for moving axially along the rotating shaft 21, and is suitable for rotating relative to the rotating shaft 21. The sleeve 23 and the reversing gear 22 are offset in the axial direction, thereby driving the reversing gear 22 to move axially.

[0054] Specifically, the reversing gear 22 moves axially along the rotating shaft 21, meshing with the forward gear 81 or the reverse gear 82 of the automatic pencil sharpener 2. Simultaneously, the reversing gear 22 drives the rotating shaft 21 to rotate synchronously, thereby transmitting power to the pen feeding mechanism of the automatic pencil sharpener 2. Furthermore, the shift fork lever 30 acts on the sleeve 23, which abuts against the reversing gear 22, causing the sleeve 23 to move up and down along the rotating shaft 21, thereby indirectly driving the reversing gear 22 to move axially along the rotating shaft 21. This helps prevent the reversing gear 22 from directly contacting the shift fork lever 30, further preventing damage caused by friction between the reversing gear 22 and the shift fork lever 30 during rotation, thereby extending the service life of the gears. Furthermore, the sleeve 23 is able to rotate relative to the rotating shaft 21. That is, when the reversing gear 22 drives the rotating shaft 21 to rotate, the sleeve 23 avoids synchronous rotation with the rotating shaft 21, further reducing wear on the sleeve 23 and the shift fork lever 30.

[0055] In some embodiments, as Figure 7 As shown, the fork rod 30 is provided with a forward rotating surface 31 and a reverse rotating surface 32 protruding in the radial direction. The forward rotating surface 31 and the reverse rotating surface 32 are distributed in high and low positions along the axial direction of the fork rod 30, and the forward rotating surface 31 and the reverse rotating surface 32 are staggered in the circumferential direction. The fork rod 30 rotates or moves axially so that the forward rotating surface 31 or the reverse rotating surface 32 can be offset from the reversing assembly 20, driving the reversing assembly 20 to move along its own axial direction.

[0056] It should be understood that when the fork lever 30 rotates or moves axially, the forward rotation surface 31 or the reverse rotation surface 32 is switched to abut against the sleeve 23 of the reversing assembly 20, so that the sleeve 23 and the reversing gear 22 move up and down together along the rotating shaft 21, and then the forward rotation gear 81 or the reverse rotation gear 82 is switched to engage with the reversing gear 22 to change the direction of the reversing gear 22, thereby realizing the conversion of the forward and retracting operations of the automatic pencil sharpener 2.

[0057] Further, such as Figure 5 and Figure 9 As shown, when the shift fork rod 30 is stationary, the sleeve 23 is suitable for abutting against the forward surface 31 or the reverse surface 32, so that the reversing gear 22 is maintained at a height that meshes with the forward gear 81, or is maintained at a height that meshes with the reverse gear 82, so that the reversing gear 22 is stably engaged with the forward gear 81 or the reverse gear 82, thereby improving the reliability and stability of the transmission of the shift trigger device 1.

[0058] In some embodiments, the reversing assembly 20 further includes a fourth reset element. The sleeve 23, the reversing gear 22, and the fourth reset element are sequentially sleeved axially on the rotating shaft 21. The fourth reset element provides a vertical upward force to the reversing gear 22, causing the reversing gear 22 and the sleeve 23 to abut against each other, and the sleeve 23 to abut against the forward rotation surface 31 or the reverse rotation surface 32 of the shift fork lever 30. In at least one embodiment, the fourth reset element is implemented as a compression spring.

[0059] An automatic pencil sharpener 2, such as Figure 13 As shown, it includes: the above-mentioned shift trigger device 1; a driving assembly 60 to drive the shift fork rod 30 of the shift trigger device 1 to move axially; a delay gear 70 to drive the delay member 40 and the shift fork rod 30 of the shift trigger device 1 to rotate synchronously, so that the shift fork rod 30 drives the reversing assembly 20 to move along its own axial direction; a forward gear 81 and a reverse gear 82, the forward gear 81 and the reverse gear 82 are arranged up and down and rotate in opposite directions, and the forward gear 81 and the reverse gear 82 are suitable for respectively cooperating with the reversing assembly 20 of the shift trigger device 1.

[0060] In at least one embodiment, Figure 3 The delay member 40 shown has a meshing portion 43 connected to the main body 41. The meshing portion 43 is adapted to mesh with the delay gear 70 for transmission. In other words, the delay member 40 directly meshes with the delay gear 70 via the meshing portion 43, thereby reducing the number of intermediate transmission steps, improving transmission reliability, simplifying the transmission structure of the automatic pencil sharpener 2, and reducing the overall size of the automatic pencil sharpener 2.

[0061] In at least one embodiment, the delay gear 70 and the forward gear 81 share a gear, or the delay gear 70 and the reverse gear 82 share a gear, which helps to reduce the number of parts of the automatic pencil sharpener 2 and thus reduce manufacturing costs.

[0062] In at least one other embodiment, Figure 5 As shown, the delay gear 70 is coaxially arranged with the forward gear 81 so that the delay gear 70 and the forward gear 81 rotate synchronously; or the delay gear 70 is coaxially arranged with the reverse gear 82 so that the delay gear 70 and the reverse gear 82 rotate synchronously, which is beneficial to simplifying the transmission structure of the automatic pencil sharpener 2.

[0063] Specifically, if Figure 5 As shown, when the driving assembly 60 drives the fork lever 30 to move axially downward, the forward rotation surface 31 of the fork lever 30 abuts against the shaft sleeve 23 axially to push the reversing gear 22 downward to engage with the forward rotation gear 81, thereby enabling the pen feeding mechanism of the automatic pencil sharpener 2 to perform the pen feeding operation. It should be understood that, as Figure 5 and Figure 6 As shown, when the fork lever 30 moves axially downward, the boss portion 33 of the fork lever 30 and the mounting portion 51 of the locking member 50 axially abut against each other, thereby allowing the locking member 50 to move axially downward synchronously with the fork lever 30, so that the locking portion 52 of the locking member 50 is located on the circumferential side of the delay member 40, and the locking portion 52 is radially opposite to the outer peripheral surface 411 of the main body 41 of the delay member 40. It is worth noting that at this time, the drive assembly 60 maintains the fork lever 30 at its current height.

[0064] Further, such as Figure 7 and Figure 9 As shown, the delay gear 70 drives the delay member 40 and the shift fork lever 30 to rotate synchronously, so that the reverse surface 32 of the shift fork lever 30 is axially arranged relative to the shaft sleeve 23, and the fourth reset member is able to provide a vertical upward force to the reversing gear 22 and the shaft sleeve 23, so that the reversing gear 22 and the shaft sleeve 23 move upward until the shaft sleeve 23 abuts the reverse surface 32 of the shift fork lever 30, so that the reversing gear 22 remains engaged with the reverse gear 82, and the pen feeding mechanism of the automatic pencil sharpener 2 can perform the pen retraction operation. It should be understood that, as Figure 7 and Figure 8As shown, the time delay member 40 rotates relative to the locking member 50, and the guide surface 422 of the time delay member 40 is able to abut against the guide surface 522 of the locking member 50, thereby driving the locking member 50 to rotate, thereby increasing the distance between the axis of the locking member 50 and the fork rod 30, allowing the mating portion 42 to pass between the locking member 50 and the fork rod 30. After the mating portion 42 passes between the locking member 50 and the fork rod 30, the locking member 50 returns to its original position under the action of gravity, so that the locking surface 521 of the locking member 50 and the mating surface 421 of the mating portion 42 are arranged relative to each other along the circumferential direction. It is worth mentioning that at this time, the drive assembly 60 maintains the fork rod 30 at its current height.

[0065] Furthermore, Figure 10 As shown, when the driving assembly 60 cancels the downward force on the fork lever 30, the first reset member enables the fork lever 30 to move vertically upward, and at the same time the fourth reset member enables the sleeve 23 and the reversing gear 22 to move upward until the upper end of the sleeve 23 abuts against the housing of the automatic pencil sharpener 2. It should be understood that Figure 11 As shown, the third reset member can cause the delay member 40 to rotate in the opposite direction until the mating surface 421 of the delay member 40 abuts against the locking surface 521 of the locking member 50, and then the locking member 50 can stop the rotation of the delay member 40, which helps to prevent the torque of the delay member 40 from acting on the fork rod 30 and causing the fork rod 30 to tilt or deviate radially, thereby reducing the friction between the fork rod 30 and the fixing member 10, so that the fork rod 30 can move more smoothly along its own axial direction. Figure 12 As shown, the second reset member enables the locking member 50 to move vertically upward, and then the locking surface 521 of the locking member 50 is separated from the mating surface 421 of the delay member 40, and the delay member 40 is able to continue to rotate under the action of the third reset member, and then the delay member 40 drives the shift fork rod 30 to rotate synchronously, so that the forward rotation surface 31 of the shift fork rod 30 is again axially opposite to the shaft sleeve 23. Under the condition that the driving assembly 60 drives the shift fork rod 30 to move downward again, the reversing gear 22 is pushed downward through the shaft sleeve 23 to engage with the forward gear.

[0066] 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 gear shift trigger device, characterized in that: include: fixings; a reversing assembly, the reversing assembly being rotatably disposed on the fixing member and being adapted to move along its own axial direction so as to cooperate with a forward gear or a reverse gear of the automatic pencil sharpener; a shift fork lever, the shift fork lever being rotatably disposed on the fixing member and being adapted to move along its own axial direction so as to abut against the reversing assembly, thereby driving the reversing assembly to move along the axial direction; A time delay member, the time delay member being connected to the shift fork rod, the time delay member being adapted to rotate synchronously with the shift fork rod, and the time delay member being adapted to move along the axial direction of the shift fork rod; A locking member is movably arranged on the fixing member so that the locking member can detachably abut against the delay member. Under the condition that the locking member abuts against the delay member, the delay member can stop rotating.

2. The gear shift triggering device according to claim 1, characterized in that: The locking member includes a mounting portion and a locking portion, the mounting portion is sleeved on the fork rod so that the locking member is suitable for axial movement along the fork rod and for rotation relative to the fork rod, and the locking portion extends from the mounting portion toward the delay member so that the locking portion is located on the outer peripheral side of the delay member, and the locking portion is able to detachably abut against the delay member along the circumferential direction.

3. The gear shift triggering device according to claim 2, characterized in that: The delay member includes a main body and a matching portion. The main body is sleeved on the fork rod so that the delay member is suitable for synchronous rotation with the fork rod and for axial movement along the fork rod. At least a portion of the matching portion protrudes radially from the main body so as to be circumferentially arranged relative to the locking portion of the locking member.

4. The gear shift triggering device according to claim 3, characterized in that: The mating portion has a mating surface, which extends radially along the main body portion and protrudes from the outer peripheral surface of the main body portion; the locking portion has a locking surface, which is circumferentially arranged opposite to the mating surface, and the locking surface is suitable for fitting with the mating surface so that the locking part abuts against the delay part.

5. The gear shift triggering device according to claim 4, characterized in that: The mating portion also has a guide surface, which is capable of transitionally connecting the mating surface and the outer peripheral surface of the main body; the locking portion also has a guide surface, which is radially opposite to the guide surface, and the guide surface is suitable for abutting against the guide surface so that the delay member is suitable for rotating relative to the locking member.

6. The gear shift triggering device according to any one of claims 1 to 5, characterized in that: The fork rod has a boss portion protruding in the radial direction, and the locking member is located below the boss portion. The locking member is suitable for abutting against the boss portion along the axial direction of the fork rod. When the fork rod moves axially downward, the locking member is driven to move axially downward along the fork rod so that the locking member is suitable for abutting against the delay member.

7. The gear shift triggering device according to any one of claims 1 to 5, characterized in that: The shift trigger device also includes a first reset member, a second reset member and a third reset member. The first reset member and the second reset member are sleeved on the shift fork rod. The first reset member is capable of providing a vertical upward force to the shift fork rod so that the shift fork rod moves along its own axial direction; the second reset member is capable of providing a vertical upward force to the locking member so that the locking member moves along the axial direction of the shift fork rod; the third reset member is elastically connected to the delay member and the fixing member so that the delay member and the shift fork rod rotate synchronously around the axis of the shift fork rod.

8. The gear shift triggering device according to any one of claims 1 to 5, characterized in that: The reversing assembly includes a rotating shaft, a reversing gear and a sleeve. The reversing gear is connected to the rotating shaft, the reversing gear is suitable for rotating synchronously with the rotating shaft, and the reversing gear is suitable for moving axially along the rotating shaft; the sleeve is connected to the rotating shaft, the sleeve is suitable for moving axially along the rotating shaft, and the sleeve is suitable for rotating relative to the rotating shaft. The sleeve and the reversing gear are axially offset from each other, thereby driving the reversing gear to move axially.

9. The gear shift triggering device according to any one of claims 1 to 5, characterized in that: The shift fork rod is provided with a forward rotating surface and a reverse rotating surface protruding in the radial direction. The forward rotating surface and the reverse rotating surface are distributed in high and low positions along the axial direction of the shift fork rod, and the forward rotating surface and the reverse rotating surface are staggered in the circumferential direction. The shift fork rod rotates or moves axially so that the forward rotating surface or the reverse rotating surface can be offset against the reversing component, driving the reversing component to move along its own axial direction.

10. An automatic pencil sharpener, characterized in that: include: The gear shift trigger device according to any one of claims 1 to 9; A driving assembly for driving the shift fork rod of the shift trigger device to move axially; A delay gear drives the delay member and the shift fork lever of the shift trigger device to rotate synchronously, so that the shift fork lever drives the reversing component of the shift trigger device to move along its own axial direction; A forward gear and a reverse gear are arranged up and down and rotate in opposite directions. The forward gear and the reverse gear are suitable for respectively cooperating with the reversing assembly.

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