CN217124383U - Pencil sharpener - Google Patents

Abstract

The utility model provides a pencil sharpener, including advancing a mechanism and cutting a mechanism, advance a mechanism and cut a mechanism and set gradually along inserting a direction with cutting a mechanism, the pencil sharpener includes carriage seat, knife rest and sword, the knife rest cup joints with carriage seat axial, the sword is installed on the knife rest, advance a mechanism and set gradually along inserting a direction and advance a drive part, carousel and separation and reunion transmission structure so as to form three-layer construction, along inserting a direction, respectively, the first layer is for advancing a drive part, the second floor is the carousel, the third floor is separation and reunion transmission structure, three-layer construction constitute the module, this module is connected with carriage seat detachable at the third floor side, and, the power incoming end of separation and reunion transmission structure is connected with detachable knife rest transmission; the pencil sharpener can conveniently connect the pencil feeding mechanism and the pencil sharpening mechanism in a dismounting way.

Description

Pencil sharpener

Technical Field

The utility model relates to a pencil sharpener technical field specifically says to a pencil sharpener.

Background

The current pencil feeding mechanism mainly comprises a support, a rotary table, a first rotary shaft, a second rotary shaft, a first driving wheel and a second driving wheel, wherein the first driving wheel is arranged on the first rotary shaft and driven by the first rotary shaft to rotate, the second driving wheel is arranged on the second rotary shaft and driven by the second rotary shaft to rotate, the first rotary shaft and the second rotary shaft are both arranged at one side of the rotary table, the support is used for rotatably supporting the first rotary shaft and the second rotary shaft, a transmission structure is arranged at one side of the rotary table on the rotary table, the rotary table is in transmission connection with the first rotary shaft and the second rotary shaft through the transmission structure, namely, the rotary table can drive the first rotary shaft and the second rotary shaft to rotate, the first rotary shaft and the second rotary shaft respectively drive the first driving wheel and the second driving wheel to rotate, the first driving wheel and the second driving wheel drive a pencil to advance/retreat in a clamping manner, the pencil is fed when the pencil advances, and the pencil retreats when the pencil retreats, therefore, the pencil feeding mechanism has two functions of pencil feeding and pencil withdrawing, and in order to simplify the structure, the rotation of the pencil feeding mechanism is generally driven by the rotation of the pencil sharpening mechanism.

Because the pencil is pushed to a certain position in the process of sharpening, and the sharpening mechanism sharpens the pencil to make the pencil be in a conical shape, the section of the pencil which is pushed against is in the conical shape, so that the diameter of the pencil is reduced when the pencil is sharpened, and the front end of the pencil can further advance along with the reduction of the diameter, therefore, the current pencil advancing process is generally fast forward without blocking, then is stopped by blocking, and then continues to advance along with the reduction of the sharpening diameter until sharpening is finished, and the front end of the sharpened pencil is in the conical shape, so that the first driving wheel and the second rubber also need to synchronously adapt to the motion state of the pencil, if the first driving wheel and the second driving wheel rotate all the time, but do adaptive adjustment along with the motion state of the pencil, certain problems exist, such as the pencil cannot advance, but the first driving wheel and the second driving wheel rotate all the time, therefore, the pencil has great friction with the first driving wheel and the second driving wheel, so that the stability of the pencil is influenced, the pencil is not beneficial to sharpening, and in addition, great abrasion is also generated.

In order to solve the above problems, in the prior art, a clutch structure is provided to cope with such a situation, for example, an automatic pencil feeding mechanism for a pencil sharpener disclosed in the publication No. CN208359795U, in which a first impeller and a first impeller shaft of the automatic pencil feeding mechanism for a pencil sharpener are connected by a clutch, the first impeller rotates and drives the first impeller shaft to rotate when the pencil is fed or withdrawn, the first impeller and the first impeller shaft are separated when the pencil is sharpened, the first impeller cannot drive the first impeller shaft to rotate, the clutch includes a holding claw provided on an end surface of the first impeller, a cross section of a portion of the first impeller shaft corresponding to the holding claw is polygonal, the holding claw is held in a portion of the first impeller shaft whose cross section is polygonal, a protrusion is provided on a side of the holding claw close to the first impeller shaft, and one side of the protrusion contacts with an outer side wall of the first impeller shaft, the number of the holding claws corresponds to the number of the sides of the cross section, and each holding claw is held on the side edge of the corresponding first impeller shaft.

Different from the prior art, the applicant develops a new path and skillfully designs the path to greatly change the pencil feeding mechanism, in general, the applicant designs the pencil feeding mechanism, the clutch transmission structure of the pencil feeding mechanism is connected with the turntable, the power input end of the clutch transmission structure is connected with the tool rest of the pencil sharpening mechanism, the power output end of the clutch transmission structure is connected with the turntable, namely, the power firstly reaches the clutch transmission structure and then is transmitted to the turntable through the clutch transmission structure, and the turntable then transmits the power to the first rotating shaft and the second rotating shaft, therefore, on one hand, the power generates a speed change at the turntable by virtue of the clutch transmission structure, thereby realizing that the pencil feeding mechanism adapts to the pencil sharpening process and is irrelevant to the first rotating shaft and/or the second rotating shaft, on the other hand, the turntable can be designed to be always well meshed with the first rotating shaft and the second rotating shaft, and the power transmission between the turntable and the first rotating shaft and the second rotating shaft is ensured, on the other hand, the first rotating shaft and/or the second rotating shaft do not need to be designed with a structure, the size is increased and the like for arranging the clutch transmission structure, so that the structures of the first rotating shaft and the second rotating shaft are simplified. Therefore, the applicant of the present invention has continued research on how to easily detachably connect the pencil feeding mechanism and the pencil sharpening mechanism, and has provided a pencil sharpener in which the pencil feeding mechanism and the pencil sharpening mechanism can be easily detachably connected, so that the pencil feeding mechanism can be easily detached.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art's defect, provide a pencil sharpener, can conveniently will advance a mechanism and cut a mechanism dismouting and connect.

Compared with the prior art, the utility model provides a pencil sharpener, including advancing a mechanism and cutting a mechanism, advance a mechanism and cut a mechanism and set up according to the preface along inserting a direction, pencil sharpener includes the carriage seat, knife rest and sword, the knife rest cup joints with the carriage seat axial, the sword is installed on the knife rest, it sets up according to the preface along inserting a direction and advances a drive section, carousel and separation and reunion transmission structure in order to form three layer construction to advance a mechanism, along inserting a direction, do not, the first layer is for advancing a drive section, the second floor is the carousel, the third layer is separation and reunion transmission structure, three layer construction constitute the module, this module is in third layer side and carriage seat detachable connections to, separation and reunion transmission structure's power incoming end is connected with the removable transmission of knife rest.

Preferably, the power access end of the clutch transmission structure is detachably connected with the tool rest in an inserting mode, and after the connecting mode is achieved, the module can be detachably and rotatably connected with the tool rest seat on the side of the third layer, or the module can be detachably and axially connected with the tool rest seat on the side of the third layer while the connecting mode is achieved.

Preferably, the module comprises an upper cover and a lower cover, the upper cover and the lower cover are connected to form an installation cavity, and the pen feeding driving part, the turntable and the clutch transmission structure are sequentially arranged in the installation cavity according to a three-layer structure.

Preferably, the lower cover is provided with a buckle, and the buckle is detachably clamped with the upper end of the tool rest seat.

Preferably, the clutch transmission structure comprises a first transmission part and a second transmission part which are axially and rotatably sleeved, the first transmission part and the second transmission part can be in clutch combination connection, the second transmission part is connected with the rotary table, the first transmission part is positioned on one side of the tool rest and is in transmission connection with the tool rest, the tool rest drives the first transmission part to rotate through the transmission connection, the first transmission part drives the second transmission part to rotate through the clutch combination connection, and the second transmission part drives the rotary table to rotate; still include the baffle, perhaps the lower cover is equipped with the baffle, forms relative confined cavity between this baffle and the first driving medium, this cavity holds the second driving medium, the baffle is equipped with and passes the hole, the second driving medium should be connected with the carousel through passing the hole.

Preferably, the second driving medium includes second pivot portion, but the separation and reunion transmission is connected between second pivot portion and the first driving medium, and second pivot portion is located and passes the hole inboard, is equipped with the first connecting shaft portion and the second connecting shaft portion that set up of protrusion in opposite directions between carousel and the second pivot portion respectively, and the transmission is cup jointed each other to first connecting shaft portion and second connecting shaft portion.

Preferably, the diameter of the second shaft portion is larger than the diameter of the through hole.

Preferably, the second rotating shaft portion is provided with a recess on the side of the rotating disk.

Preferably, the turntable is provided with a first connecting shaft portion, the second rotating shaft portion is provided with a second connecting shaft portion, and the first connecting shaft portion is inserted into the recess.

Preferably, the diameter of the recess is greater than the diameter of the through-hole.

Preferably, the diameter of the turntable is greater than the diameter of the through hole.

Preferably, the side of the lower cover on the turntable is provided with a support part arranged around the circumference of the turntable, and the support part is used as a bracket.

Preferably, the support portion is further coupled to the upper cover.

Preferably, the side of the partition located at the turntable is provided with an annular peripheral wall arranged around the circumference of the turntable, the annular peripheral wall being in rotatable engagement with the circumference of the turntable.

Preferably, the side of the first transmission member located on the second transmission member is provided with a first rotating shaft portion protruding toward the second transmission member, and the side of the second transmission member located on the first rotating shaft portion is provided with a first rotating shaft fitting hole or a third rotating shaft portion.

Preferably, the end surface of the first shaft portion is provided with an annular portion around the insertion hole, the annular portion serving to block the lead dust.

Preferably, the end face of the annular portion is in rotatable engagement with the side face of the second transmission member on the side of the first shaft portion.

Preferably, the first rotating shaft part is provided with an insertion hole for inserting the tool holder.

Preferably, the clutch transmission structure adopts a clutch transmission structure which utilizes friction connection transmission and/or utilizes elastic concave-convex matching connection transmission.

Preferably, the clutch transmission structure comprises a first transmission piece and a second transmission piece which are axially and rotatably sleeved, a clutch piece is arranged between the inner peripheral wall surface of the first transmission piece and the outer peripheral wall surface of the second transmission piece, the clutch piece is supported between the inner peripheral wall surface of the first transmission piece and the outer peripheral wall surface of the second transmission piece, and the clutch piece is used for transmitting power between the first transmission piece and the second transmission piece; the first transmission piece is used for inputting power, the second transmission piece is used for transmitting the rotating disc, or the second transmission piece is used for inputting power, and the first transmission piece is used for transmitting the rotating disc.

Preferably, an elastic concave-convex matching structure is arranged between the inner peripheral wall surface of the first transmission piece and the outer peripheral wall surface of the second transmission piece, the elastic concave-convex matching structure is used for transmitting power between the first transmission piece and the second transmission piece, when the acting force of the second transmission piece is increased due to the fact that the pen is blocked, the second transmission piece can overcome the elasticity to enable the concave part and the convex part in the elastic concave-convex matching structure to rotate relatively, and the number of the concave part and the number of the convex part are at least one.

Preferably, a transition section is arranged between adjacent concave parts, the convex part passes through the transition section after coming out of one concave part and then enters another adjacent concave part, and when passing through the transition section, the transition section and the convex part are elastically abutted and can relatively slide.

Preferably, each concave portion is provided on an inner peripheral wall surface of the first transmission member, and each convex portion is provided on an outer peripheral wall surface of the second transmission member.

Preferably, the clutch member is used for friction connection between the first transmission member and the second transmission member to transmit power.

Preferably, the first transmission member includes a bottom wall and a cylindrical peripheral wall, and an outer end face of the bottom wall serves as an axial positioning face for axial positioning connection with the tool holder.

Preferably, the tool rest is provided with a circumferential part, and when the tool rest enters and exits the insertion hole, the axial positioning surface is axially positioned and connected with the circumferential part.

After adopting above-mentioned structure, compare with prior art, the utility model has the advantages of it is following: the utility model discloses a design ingeniously, advance a mechanism along inserting a direction according to the preface setting advance a drive division, carousel and separation and reunion transmission structure in order to form three layer construction, three layer construction constitute the module, this module is in third layer side and carriage seat detachable connections to, the power incoming end and the removable transmission of carriage of separation and reunion transmission structure are connected, consequently can conveniently will advance a mechanism and cut a mechanism dismouting and connect, when needs pull down into a mechanism, pull down the module from the carriage seat, the power incoming end and the separation of carriage of separation and reunion transmission structure simultaneously.

Drawings

Fig. 1 is a perspective view of a pencil sharpener.

Fig. 2 is a perspective view of fig. 1 with a portion of the housing and the tool holder removed.

Fig. 3 is a top view of fig. 2 with the top cover removed.

Fig. 4 is a sectional view taken along line a-a.

FIG. 5 is a sectional view taken along line A-A of the module.

Fig. 6 is a perspective view of fig. 2 from another perspective.

Fig. 7 is a perspective view of fig. 3 with the inner cover removed.

Fig. 8 is a perspective view of fig. 7 with the first and second rotating shafts removed.

Fig. 9 is a perspective view of fig. 8 with the turntable removed.

Fig. 10 is a perspective view of fig. 9 with the cover removed.

Fig. 11 is a perspective view of fig. 10 with the first transmission member and the second transmission member removed.

Fig. 12 is an exploded view of a clutch transmission configuration.

Fig. 13 is an exploded view of fig. 12 shown from a bottom perspective.

Fig. 14 is a top view of a clutch transmission structure.

FIG. 15 is a sectional view taken along line B-B.

Fig. 16 is a perspective view of another clutch transmission configuration.

Fig. 17 is an exploded view of another clutch transmission configuration.

Fig. 18 is a perspective view (shown in a bottom view) of a second transmission member of yet another clutch transmission structure.

The reference numbers indicate that 1-shell, 2-rotary table, 3-first rotary shaft, 4-second rotary shaft, 5-first driving wheel, 6-second driving wheel, 7-first driving wheel, 8-second driving wheel, 9-driving spiral rack, 10-pen inserting hole, 11-first driving piece, 12-second driving piece, 13-elastic clutch piece, 14-concave part, 15-convex part, 16-transition section, 17-lower cover, 17.1-supporting part, 17.2-partition board, 18-top cover, 19-upper cover, 19.1-top surface, 20-through hole, 21-second rotary shaft part, 22-concave part, 23-first connecting shaft part, 24-second connecting shaft part, 25-annular peripheral wall, 26-first rotary shaft part, 27-third rotating shaft part, 28-annular part, 29-outer end face, 30-lower section, 31-upper section, 32-knife, 33-knife rest, 34-electric motor, 35-battery, 36-jack, 37-output gear, 38-gear transmission structure, 39-movable tongue, 40-touch switch, 41-pencil-sharpening conical die, 42-power input end, 43-friction end face, 44-knife rest seat, 45-buckle and 46-circumferential part.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

The following is a more detailed description of the present invention:

as shown in fig. 1, a pencil sharpener comprises a housing 1, a pencil feeding mechanism and a pencil sharpening mechanism, the pencil feeding mechanism and the pencil sharpening mechanism are arranged in sequence along a pencil inserting direction according to the vertical direction shown in fig. 1, that is, the pencil feeding mechanism and the pencil sharpening mechanism shown in fig. 2 are distributed vertically, the top end of the housing 1 is provided with an insertion opening of a pencil inserting hole 10, the insertion opening is a component of the whole hole section of the pencil inserting hole 10, the pencil sharpening mechanism is provided with a knife rest 44, a knife rest 33 and a knife 32, as shown in fig. 4, the knife rest 33 is axially sleeved with the knife rest 44, the knife 32 is arranged on the knife rest 33, the knife rest 33 is provided with a pencil sharpening conical die 41, when the pencil sharpener is used for sharpening, the knife rest 44 is stationary, the knife 32 rotates together with the knife rest 33 and the pencil conical die 41, the rotation of the knife rest 33 can adopt a manual driving scheme, an electric driving scheme can also be adopted, and in this example, an electric driving scheme is mainly used, namely the tool rest 33 is driven by an electric motor.

The tool rest 44 is axially long, so that the cutting process is performed in the drawing.

As shown in fig. 2 to 11, the electric driving scheme specifically includes an electric motor 34, a battery 35, a gear transmission structure 38, a movable tongue portion 39 and a trigger switch 40, the battery 35 is used for supplying power, an output shaft of the electric motor 34 is connected with an output gear 37, the output gear 37 transmits power to the tool holder 33 through the gear transmission structure 38, a telescopic end of the movable tongue portion 39 is disposed in the insertion opening, when a pencil is inserted into the insertion opening, the pencil first contacts the telescopic end and pushes the movable tongue portion 39 to move transversely, so that the movable tongue portion 39 triggers the trigger switch 40, after the trigger switch 40 is turned on, the electric motor 34 works, and the trigger switch 40 is, such as a micro switch or a position switch.

Advance a mechanism along inserting a direction and set up according to the preface into a drive division, carousel 2 and separation and reunion transmission structure in order to form three layer construction, along inserting a direction, the difference is, first layer is for advancing a drive division, and the second floor is carousel 2, and the third layer is separation and reunion transmission structure, three layer construction constitute the module, this module is in third layer side and knife rest seat 44 detachable connections to, separation and reunion transmission structure's power incoming end and the detachable transmission of knife rest 33 are connected.

The module comprises an upper cover 19 and a lower cover 17, the upper cover 19 and the lower cover 17 are connected to form an installation cavity, and a pen feeding driving part, the turntable 2 and a clutch transmission structure are sequentially arranged in the installation cavity according to a three-layer structure. The upper cover 19 is also provided with a top cover 18, an annular space is arranged between the shell 1 and the pencil feeding mechanism and the pencil sharpening mechanism, the annular space is used for containing scraps generated during pencil sharpening, the top cover 18 is used for detachably closing the annular space, and the scraps can be poured when the top cover 18 is opened. A movable tongue portion 39 is arranged between the top cover 18 and the upper cover 19, and the inner side of the upper cover 19 is further provided with a pen feeding driving portion such as the first rotating shaft 3 and the second rotating shaft 4. The upper cover 19 is provided with a top surface 19.1, the opening of the pen insertion hole 10 is provided in the top cover 18, and the pen insertion hole 10 penetrates through the top surface 19.1 to further enter the interior of the pen feeding mechanism.

The power input end of the clutch transmission structure is detachably inserted into the tool holder, after the module is inserted, the module can be detachably and rotatably connected with the tool holder seat on the third layer side, specifically, in some embodiments, as shown in fig. 4 and 5, the power input end of the clutch transmission structure is provided with a jack 36, the upper end of the tool holder 33 is inserted into the jack 36 as the power input end 42, in some embodiments, as shown in fig. 4 and 6, the lower cover 17 is provided with a buckle 45, the buckle 45 is detachably and fixedly connected with the upper end of the tool holder seat 44, in this example, after the power input end 42 is inserted into the jack 36, the buckle 45 is rotatably and fixedly connected with the upper end of the tool holder seat 44, a thread can also be arranged on the upper end of the tool holder seat 44, the buckle 45 is rotatably and fixedly connected with the thread, and the buckle 45 can further extend spirally to form a thread, and is rotatably and fixedly connected with the upper end of the tool holder seat 44 through the thread-shaped buckle 45. Of course, instead of a rotary latch, other configurations are possible, for example, a plug-in connection with which the module is detachably axially connected to the tool holder base on the third layer side, for example an axial latch.

As shown in fig. 4 to 11, the pencil feeding mechanism includes a clutch transmission structure, a bracket, a rotary table 2, a first rotary shaft 3, a second rotary shaft 4, a first driving wheel 7 and a second driving wheel 8, a transmission structure is provided between the rotary table 2 and the first rotary shaft 3, and between the rotary table 2 and the second rotary shaft 4, the first driving wheel 7 is installed on the first rotary shaft 3 and driven by the first rotary shaft 3 to rotate, the second driving wheel 8 is installed on the second rotary shaft 4 and driven by the second rotary shaft 4 to rotate, the first driving wheel 7 and the second driving wheel 8 are used for driving the pencil to advance/retreat, the clutch transmission structure is connected with the rotary table 2, the clutch transmission structure is used for transmitting power to the rotary table 2, and the rotary table 2 transmits power to the first rotary shaft 3 and the second rotary shaft 4. As can be seen from the drawings, the clutch transmission structure is not in power connection with the first rotating shaft 3 and the second rotating shaft 4, the rotation speed change of the first rotating shaft 3 and the second rotating shaft 4 is provided by the rotation speed change of the rotating disc 2, and the rotation speed change of the rotating disc 2 is controlled by the clutch transmission structure.

The clutch transmission structure can adopt different clutch transmission structures, for example, the clutch transmission structure adopts a clutch transmission structure which utilizes friction connection transmission and/or utilizes elastic concave-convex matching connection transmission.

To the friction joint transmission, can set up to circumference friction joint transmission, also can set up to terminal surface friction joint transmission etc. can also combine the unsmooth cooperation of elasticity to connect the transmission and set up the friction joint transmission, consequently, separation and reunion transmission structure multiple structural style has, in a word, all is applicable to the utility model discloses a separation and reunion transmission structure all can be applied to the utility model discloses a transmission and separation and reunion transmission structure.

Preferably, the clutch transmission structure adopts a closed design. The closed design does not require absolute closure, but rather means that associated structure is provided to block contaminants from entering the clutch engagement cavity. Of course, it is better if better sealing can be provided, but this may lead to a complicated structure and/or increased costs and/or complicated production and assembly.

Preferably, as shown in fig. 2 to 6, the pencil feeding mechanism is arranged on the upper side of the pencil sharpening mechanism as an independent module, and the pencil feeding mechanism is of a roughly three-layer structure, wherein from bottom to top, the first layer is a clutch transmission structure, the second layer is a rotary disc 2, and the third layer is a driving part formed by a first rotary shaft 3 and a second rotary shaft 4.

Preferably, in order to make the structure compact and facilitate the arrangement of the pen insertion hole 10, the pen insertion hole 10 sequentially passes through the three layers to reach the sharpening mechanism of the pencil sharpener.

Preferably, the power input of the clutch transmission structure is located on one side of the first layer, which is far away from the second layer, and the power output of the clutch transmission structure is located on the other side of the first layer, and the power output is used for driving the rotating disc 2 to rotate. By such a design, the power transmission path can be made shorter.

In some embodiments, a clutch transmission structure as shown in fig. 12 to 15 is adopted, and the clutch transmission structure includes a first transmission member 11 and a second transmission member 12, the first transmission member 11 and the second transmission member 12 are in clutch connection, the second transmission member 12 is connected with the rotary table 2, the first transmission member 11 is used for inputting power and driving the second transmission member 12 to rotate through the clutch connection, and the second transmission member 12 is used for outputting power to the rotary table 2. The input power is provided by the tool rest 33, and the tool rest 33 is in transmission connection with the first transmission member 11, so that the tool rest 33 rotates to drive the first transmission member 11 to rotate.

The first transmission piece 11 and the second transmission piece 12 are axially sleeved, so that the axial size is more compact.

For the friction coupling transmission, for example, an elastic clutch member 13 is provided between an inner peripheral wall surface of the first transmission member 11 and an outer peripheral wall surface of the second transmission member 12, the elastic clutch member 13 is elastically supported between the inner peripheral wall surface of the first transmission member 11 and the outer peripheral wall surface of the second transmission member 12, and the elastic clutch member 13 is used for transmitting power between the first transmission member 11 and the second transmission member 12. Therefore, when the pencil cannot enter quickly due to blockage in the pencil sharpening process, even the pencil can be in a stop state, the pencil can advance slowly along with the pencil sharpening process only after the pencil is sharpened to be smaller in diameter, at the moment, due to the transmission of the reverse acting force generated by the rotating disc 2, the first rotating shaft 3, the second rotating shaft 4, the first driving wheel 7 and the second driving wheel 8 on the advancing blockage of the pencil, the reverse acting force enables the second transmission piece 12 to rotate to meet the blockage, when the reverse acting force is larger than the friction force of friction connection transmission, the second transmission piece 12 moves relative to the first transmission piece 11, and the relative sliding can be understood from the movement form, so that the speed difference required by the pencil sharpening mechanism is generated, and the pencil mechanism can adapt to the pencil sharpening process.

For the connection transmission of the elastic concave-convex matching structure, for example, an elastic concave-convex matching structure is arranged between the inner peripheral wall surface of the first transmission member 11 and the outer peripheral wall surface of the second transmission member 12, the elastic concave-convex matching structure is used for transmitting power between the first transmission member 11 and the second transmission member 12, when the acting force of the second transmission member 12 is increased due to the resistance of pen feeding, the second transmission member 12 can overcome the elasticity to enable the concave part 14 and the convex part 15 in the elastic concave-convex matching structure to relatively rotate, and the number of the concave part 14 and the convex part 15 is at least one. Therefore, when the second transmission piece 12 is blocked to rotate, the relative movement is realized by overcoming the resistance of the matching of the concave part 14 and the convex part 15, so that the pencil feeding mechanism can adapt to the pencil sharpening process.

As shown in fig. 12 and 14, the elastic male-female matching structure may further be provided with a transition portion to make the relative rotation smoother, for example, a transition section 16 is provided between adjacent concave portions 14, the convex portion 15 exits from one concave portion 14 and then passes through the transition section 16 to enter another concave portion 14 adjacent thereto, and when passing through the transition section 16, the transition section 16 and the convex portion 15 are elastically abutted and can relatively slide. There may be some friction between the transition 16 and the protrusion 15, not smooth, so that the movement is smoother by this friction.

For more convenient production, for example, the concave portions 14 are provided on the inner peripheral wall surface of the first transmission member 11, and the convex portions 15 are provided on the outer peripheral wall surface of the second transmission member 12.

The closed design, for example, also includes a partition 17.2, the partition 17.2 can be connected with the lower cover 17 to support the lower cover 17, the partition 17.2 covers the first transmission member 11, a relatively closed cavity is formed between the partition 17.2 and the first transmission member 11, the cavity receives the second transmission member 12, the partition 17.2 is provided with a through hole 20, and the second transmission member 12 is connected with the rotary table 2 through the through hole 20.

By a further development of the applicant, a closed design can be further improved, for example the second transmission member 12 comprises a second shaft portion 21, the second shaft portion 21 is in clutchable transmission connection with the first transmission member 11, the second shaft portion 21 is located inside the through hole 20, and the diameter of the second shaft portion 21 is larger than the diameter of the through hole 20.

By a further development of the applicant, a closed design can be further improved, for example where the second spindle part 21 is provided with a recess 22 on the side of the turntable 2, the diameter of the recess 22 being larger than the diameter through the hole 20.

With further refinements of the applicant, closed designs can be further promoted, for example with a turntable 2 with a diameter larger than the diameter of the through-opening 20.

By means of a further development of the applicant, a closed design can be further improved, for example, a first connecting shaft portion 23 and a second connecting shaft portion 24 are respectively provided between the rotary disc 2 and the second transmission member 12, the first connecting shaft portion 23 and the second connecting shaft portion 24 are in sleeved connection with each other for transmission, and the first connecting shaft portion 23 is inserted into the recess 22.

By means of a further development of the applicant, the structure can be simplified even further, increasing the compactness of the structure, for example, as shown in fig. 5 to 7, the side of the partition 17.2 located on the turntable 2 is provided with a support 17.1 arranged circumferentially around the turntable 2, which support 17.1 acts as a support. As shown in fig. 5 to 7, two ends of the first rotating shaft 3 and the second rotating shaft 4 are respectively rotatably mounted on the supporting portion 17.1, and the supporting portion 17.1 is provided with a hole or a groove for rotatably mounting the two ends of the first rotating shaft 3 and the second rotating shaft 4.

In some embodiments, as shown in fig. 4 and 5, the supporting portion 17.1 is also sleeved with the upper cover 19, so as to facilitate the connection between the upper cover 19 and the lower cover 17, thereby facilitating the obtaining of the module.

The rotation of the turntable 2 can be further stabilized by a further development of the applicant, for example, as shown in fig. 6 and 7, the side of the partition 17.2 located on the turntable 2 is provided with an annular peripheral wall 25 arranged around the circumference of the turntable 2, the annular peripheral wall 25 being in rotatable engagement with the circumference of the turntable 2.

Through further improvement of the applicant, the rotational fit between the first transmission piece 11 and the second transmission piece 12 can be further facilitated to be assembled and rotationally stabilized, for example, a first rotating shaft portion 26 and a first rotating shaft fitting hole are arranged between the first transmission piece 11 and the second transmission piece 12, the first rotating shaft portion 26 and the first rotating shaft fitting hole are rotatably sleeved to form a rotating portion capable of rotating relatively, or for example, a first rotating shaft portion 26 and a third rotating shaft portion 27 are arranged between the first transmission piece 11 and the second transmission piece 12, and a through hole of the first rotating shaft portion 26 and the third rotating shaft portion 27 are rotatably sleeved to form the rotating portion; the arrangement of the pen insertion hole 10 is as follows: a section of the pen insertion hole 10 passes through the rotating part to the side of the first transmission member 11 away from the rotary disc 2.

By means of a further improvement of the applicant, the axial dimension of the first transmission member 11 sleeved with the second transmission member 12 can be further reduced, for example, the side of the first transmission member 11 located on the second transmission member 12 is provided with a first rotating shaft portion 26 protruding toward the second transmission member 12, and the side of the second transmission member 12 located on the first rotating shaft portion 26 is provided with a first rotating shaft fitting hole or a third rotating shaft portion 27. Fig. 10 to 13 show the first rotating shaft part 26 and the third rotating shaft part 27 rotatably fitted together.

With a further development of the applicant, the closed design can be further improved, for example, as shown in fig. 4, 12, 15, the end face of the first shaft portion 26 is provided with an annular portion 28 around the pen insertion hole 10, the annular portion 28 serving to block the lead dust.

By means of a further development of the applicant, the axial dimension of the power input end 42 in sleeved connection with the first transmission member 11 can be further reduced, for example, as shown in fig. 4, 13 and 15, the first rotating shaft portion 26 is provided with an insertion hole 36 for connecting the power input end 42, the power input end 42 is the upper end of the tool holder 33, and the upper end of the tool holder 33 is inserted and matched in the insertion hole 36, so that the tool holder 33 rotates to drive the first transmission member 11 to rotate.

Because the pencil feeding mechanism is connected with the pencil sharpening conical mold 41, the applicant designs that the pencil feeding mechanism is compact in connection, so that a pencil can be inserted into the pencil sharpening conical mold 41 immediately after being conveyed by the pencil feeding mechanism, an opening of the pencil sharpening conical mold 41 is inserted into the insertion hole 36, and lead foam may leak from the connection position to the outside, so that the applicant further improves to solve the above problem, so that the connection is compact and the sealing design is facilitated, specifically, the first transmission member 11 comprises a bottom wall and a cylindrical peripheral wall, an outer end surface 29 of the bottom wall is used as an axial positioning surface, the tool rest 33 is provided with a circumferential portion 46, in this example, the pencil sharpening conical mold 41 is provided with the circumferential portion 46, and the axial positioning surface is axially positioned and connected with the circumferential portion 46, on one hand, the assembly is facilitated, on the other hand, the circumferential portion 46 is arranged to be in close fit with the axial positioning surface, and the close fit is beneficial to prevent leakage, in addition, the joint ring portion 28 is fitted rotatably in close contact with the ring-shaped end surface around the third shaft portion 27 and the third shaft portion 27 is inserted into the through hole of the first shaft portion 26, thereby better preventing the leakage problem at the joint.

By means of a further development of the applicant, the closed design can be further improved, for example, as shown in fig. 4, the section of the pen insertion hole 10 passing through the first transmission piece 11 and the second transmission piece 12 is denoted as a lower section 30, the section of the pen insertion hole 10 passing through the turntable 2 is denoted as an upper section 31, and the diameter of the upper section 31 is equal to or smaller than the diameter of the lower section 30, which is shown in the drawing.

As shown in fig. 3 and 4, the axis of the pencil advancing/retreating is the same as the rotation axis of the clutch transmission structure. After the design, the structure is compact, the power transmission is facilitated, and the working stability of the advancing/retreating of the pencil is good.

As shown in fig. 5 and 6, the transmission structure includes a transmission helical rack 9 disposed on the turntable 2, a first transmission wheel 5 disposed on the first rotating shaft 3, and a second transmission wheel 6 disposed on the second rotating shaft 4, the turntable 2 drives the transmission helical rack 9 to rotate when rotating, the transmission helical rack 9 rotates to transmit power through the teeth on the first transmission wheel 5 and the teeth on the second transmission wheel 6, and the transmission direction is changed, so as to adapt to the structural design that the forward/backward axis of the pencil of the present disclosure and the rotation axis of the clutch transmission structure are the same axis.

As can be seen from the foregoing, as shown in fig. 12 to 15, a clutch transmission structure includes a first transmission member 11 and a second transmission member 12, a clutch cavity is formed between the first transmission member 11 and the second transmission member 12, an elastic clutch member 13 disposed between the first transmission member 11 and the second transmission member 12 includes a protruding portion 15 having one end fixed and the other end capable of elastically swinging, a corresponding recessed portion 14 is disposed on an inner circumferential wall of the first transmission member 11, the elastic clutch member 13 is disposed in a circumferential direction of the second transmission member 12, and the elastic clutch member 13 of the clutch transmission structure has one end supported, so that elastic swinging is more easily generated, and the protruding portion 15 is easily separated from the recessed portion 14 and enters an adjacent next recessed portion 14, so that the protruding portion 15 is not easily jammed or jammed.

As shown in fig. 16 and 17, another clutch transmission structure is provided, which includes a first transmission member 11 and a second transmission member 12, a clutch cavity is provided between the first transmission member 11 and the second transmission member 12, an elastic clutch member 13 provided between the first transmission member 11 and the second transmission member 12 includes a convex portion 15 approximately arranged in the middle, a corresponding concave portion 14 is provided on an inner circumferential wall of the first transmission member 11, the elastic clutch member 13 is provided in a circumferential direction of the second transmission member 12, an elastic avoiding space is provided between the elastic clutch member 13 and the second transmission member 12 in the circumferential direction, and the elastic avoiding space shown in the drawings is a circumferential closed-loop hole. The other clutch transmission structure has two end supports, so that larger elastic supporting force can be provided, in addition, because the convex part 15 is arranged in the middle, the convex part 15 is easy to leave from the concave part 14 and enter into the next adjacent concave part 14, and in addition, the other clutch transmission structure can be arranged more symmetrically.

The clutch transmission structure can be provided with a transition section 16, and the transition section 16 can also be used as a friction part.

Fig. 18 shows another clutch transmission structure, compared with the two previous structures, the main difference is that the first transmission member 11 and the second transmission member 12 are in friction connection transmission, and the clutch part is not arranged in the circumferential direction, but arranged on an end surface, that is, an inner end surface of the bottom wall of the first transmission member 11 is in friction connection transmission with a friction end surface 43 of the second transmission member 12, and a specific arrangement of the friction end surface 43 is, for example, a cylinder protruding towards the inner end surface, as shown in fig. 16, the cylinder is arranged circumferentially around the second transmission member 12, and the lower end surface of the cylinder is used as the friction end surface 43.

In understanding the present invention, if necessary, the above structure can be understood together with other embodiments/drawings, and detailed description is omitted here.

The above description is only an illustrative embodiment of the present invention, and therefore all equivalent changes or modifications made by the structure, features and principles of the present invention are included in the protection scope of the present invention.

Claims (26)

1. The utility model provides a pencil sharpener, including advancing a mechanism and cutting a mechanism, advance a mechanism and cut a mechanism and set gradually along inserting a direction, the pencil sharpener includes knife rest seat (44), knife rest (33) and sword (32), knife rest (33) cup joint with knife rest seat (44) axial, sword (32) are installed on knife rest (33), a serial communication port, advance a mechanism and set gradually along inserting a direction and advance a drive division, carousel (2) and separation and reunion transmission structure in order to form three layer construction, along inserting a direction, do respectively, the first layer is for advancing a drive division, the second floor is carousel (2), the third layer is separation and reunion transmission structure, three layer construction constitute the module, this module is removable to be connected with knife rest seat (44) on the third layer side, and separation and reunion transmission structure's power incoming end is connected with knife rest (33) transmission.

2. A pencil sharpener according to claim 1, characterised in that the power input of the clutch transmission is detachably connected to the holder (33), after which the module is detachably rotatable connected to the holder seat (44) on the third side, or simultaneously with which the module is detachably axially connected to the holder seat (44) on the third side.

3. The pencil sharpener according to claim 1, wherein the module comprises an upper cover (19) and a lower cover (17), the upper cover (19) and the lower cover (17) are connected to form a mounting cavity, and the pencil feeding driving part, the turntable (2) and the clutch transmission structure are sequentially arranged in the mounting cavity according to a three-layer structure.

4. The pencil sharpener according to claim 3, characterized in that the lower cover (17) is provided with a catch (45), and the catch (45) is detachably engaged with the upper end of the holder base (44).

5. The pencil sharpener according to claim 3, characterized in that the clutch transmission structure comprises a first transmission member (11) and a second transmission member (12) which are axially rotatably sleeved, the first transmission member (11) and the second transmission member (12) are in clutch connection, the second transmission member (12) is connected with the turntable (2), the first transmission member (11) is positioned at one side of the knife rest (33) and is in transmission connection with the knife rest (33), the knife rest (33) drives the first transmission member (11) to rotate through the transmission connection, the first transmission member (11) drives the second transmission member (12) to rotate through the clutch connection, and the second transmission member (12) drives the turntable (2) to rotate; still include baffle (17.2), perhaps lower cover (17) are equipped with baffle (17.2), form relative confined cavity between this baffle (17.2) and first driving medium (11), this cavity holds second driving medium (12), baffle (17.2) are equipped with and pass hole (20), and second driving medium (12) are connected with carousel (2) through this hole (20) that passes.

6. The pencil sharpener according to claim 5, characterized in that the second transmission member (12) comprises a second rotating shaft portion (21), the second rotating shaft portion (21) is in detachable transmission connection with the first transmission member (11), the second rotating shaft portion (21) is located inside the through hole (20), a first connecting shaft portion (23) and a second connecting shaft portion (24) which are arranged in a protruding mode in the opposite direction are respectively arranged between the turntable (2) and the second rotating shaft portion (21), and the first connecting shaft portion (23) and the second connecting shaft portion (24) are in sleeved transmission with each other.

7. A pencil sharpener according to claim 6, characterised in that the diameter of the second shaft portion (21) is greater than the diameter of the through hole (20).

8. A pencil sharpener according to claim 6, characterised in that the second spindle part (21) is provided with a recess (22) on the side of the turntable (2).

9. The pencil sharpener according to claim 8, characterized in that the turntable (2) is provided with a first connecting shaft portion (23), the second rotating shaft portion (21) is provided with a second connecting shaft portion (24), and the first connecting shaft portion (23) is inserted into said recess (22).

10. The pencil sharpener of claim 8, characterized in that the diameter of the recess (22) is greater than the diameter of the through hole (20).

11. The pencil sharpener according to claim 6, characterized in that the diameter of the turntable (2) is larger than the diameter through the hole (20).

12. A pencil sharpener according to claim 3, characterised in that the side of the lower cover (17) on the turntable (2) is provided with a support (17.1) arranged circumferentially around the turntable (2), which support (17.1) acts as a stand.

13. The pencil sharpener according to claim 12, characterized in that the support (17.1) is also connected to the upper cover (19) in a telescopic manner.

14. A pencil sharpener according to claim 5, characterised in that the side of the partition (17.2) which is located on the turntable (2) is provided with an annular peripheral wall (25) which is arranged circumferentially around the turntable (2), which annular peripheral wall (25) is in circumferential, rotatable engagement with the turntable (2).

15. A pencil sharpener according to claim 5, characterised in that the side of the first transmission member (11) lying on the second transmission member (12) is provided with a first shaft portion (26) projecting towards the second transmission member (12), and that the side of the second transmission member (12) lying on the first shaft portion (26) is provided with a first shaft engagement hole or a third shaft portion (27).

16. The pencil sharpener of claim 15, characterized in that the end face of the first shaft portion (26) is provided with an annular portion (28) around the insertion hole (10), the annular portion (28) serving to block lead dust.

17. A pencil sharpener according to claim 16, characterised in that the end face of the annular portion (28) is in rotatable engagement with the side face of the second transmission member (12) on the side of the first shaft portion (26).

18. A pencil sharpener according to claim 15, characterised in that the first spindle part (26) is provided with a receptacle (36) for the insertion of the holder (33).

19. The pencil sharpener as claimed in claim 1 or 3, wherein the clutch transmission structure is a clutch transmission structure using friction connection transmission and/or elastic concave-convex fit connection transmission.

20. The pencil sharpener according to claim 19, wherein the clutch transmission structure includes a first transmission member (11) and a second transmission member (12) which are axially rotatably fitted, a clutch member is provided between an inner peripheral wall surface of the first transmission member (11) and an outer peripheral wall surface of the second transmission member (12), the clutch member being supported between the inner peripheral wall surface of the first transmission member (11) and the outer peripheral wall surface of the second transmission member (12), the clutch member being used for transmitting power between the first transmission member (11) and the second transmission member (12); the first transmission piece (11) is used for inputting power, the second transmission piece (12) is used for transmitting the rotary table (2), or the second transmission piece (12) is used for inputting power, and the first transmission piece (11) is used for transmitting the rotary table (2).

21. The pencil sharpener according to claim 20, wherein an elastic concave-convex engagement structure is provided between the inner peripheral wall surface of the first transmission member (11) and the outer peripheral wall surface of the second transmission member (12), the elastic concave-convex engagement structure is used for transmitting power between the first transmission member (11) and the second transmission member (12), and when the acting force of the second transmission member (12) is increased due to the resistance to pencil feeding, the second transmission member (12) can overcome the elasticity to enable the relative rotation between the concave portion (14) and the convex portion (15) in the elastic concave-convex engagement structure, and the number of the concave portion (14) and the convex portion (15) is at least one.

22. The pencil sharpener according to claim 21, characterized in that a transition (16) is provided between adjacent recesses (14), the projections (15) passing through the transition (16) after exiting one recess (14) and then entering the other adjacent recess (14), the transition (16) and the projections (15) being in resilient abutment and being slidable relative to each other when passing through the transition (16).

23. The pencil sharpener according to claim 21, wherein each concave portion (14) is provided on an inner peripheral wall surface of the first transmission member (11), and each convex portion (15) is provided on an outer peripheral wall surface of the second transmission member (12).

24. A pencil sharpener according to claim 20, characterised in that the clutch member is adapted to transmit power in a frictional connection between the first transmission member (11) and the second transmission member (12).

25. A pencil sharpener according to claim 5, characterised in that the first transmission member (11) comprises a bottom wall and a cylindrical peripheral wall, the outer end face (29) of the bottom wall serving as an axial locating face for axial locating connection with the holder (33).

26. The pencil sharpener of claim 25, wherein the holder (33) has a peripheral portion (46), and the axial locating surface is in axial locating engagement with the peripheral portion (46) when the holder (33) is moved into and out of the receptacle (36).

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