CN217705305U - Pencil feeding structure and pencil sharpener - Google Patents

Abstract

The utility model provides a pencil feeding structure, including separation and reunion transmission structure, support, carousel, first pivot, second pivot, first drive wheel and second drive wheel, be equipped with transmission structure between carousel and first pivot, the second pivot, first drive wheel is installed and is driven the rotation by first pivot in the first pivot, and the second drive wheel is installed and is driven the rotation by the second pivot in the second pivot, and first drive wheel, second drive wheel are used for driving the pencil and go forward/retreat, separation and reunion transmission structure be connected with the carousel, this separation and reunion transmission structure is used for transmitting power to the carousel, the carousel again with power transmission to first pivot, second pivot, this pencil feeding structure adaptation structure need not set up in first pivot and/or second pivot; still provide a penknife, adopt aforementioned structure of advancing.

Description

Pencil feeding structure and pencil sharpener

Technical Field

The utility model relates to a penknife technical field specifically says a advance a structure and penknife.

Background

The pen feeding structure 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 to rotate by the first rotary shaft, the second driving wheel is arranged on the second rotary shaft and driven to rotate by the second rotary shaft, the first rotary shaft and the second rotary shaft are both arranged on 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 on one side of 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, and drive a pencil to advance or retreat in a clamping mode, the pencil advances or retreats, so that the pencil has two functions of pen feeding and pen retreating, and in order to simplify the structure, the rotation of the pen feeding structure is generally driven when the pen sharpening mechanism rotates.

The first driving wheel and the second driving wheel rotate all the time, but the first driving wheel and the second driving wheel rotate all the time, so that the pencil has great friction with the first driving wheel and the second driving wheel, the stability of the pencil is influenced, and great abrasion is generated.

In order to solve the above problems, in the prior art, a clutch structure is provided to deal with such a situation, for example, an automatic pencil feeding mechanism for a pencil sharpener disclosed by CN208359795U, where a first impeller and a first impeller shaft of the automatic pencil feeding mechanism 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 a polygon, the holding claw is held outside the portion of the first impeller shaft whose cross section is the polygon, a protrusion is provided on a side of the holding claw close to the first impeller shaft, 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 sides of the cross section, each holding claw is held on a side of the corresponding first impeller shaft, and the first impeller shaft cannot be driven by the first impeller shaft to rotate when the first impeller shaft is cut by the first impeller shaft.

The above is the general structure and working principle of the current pen feeding structure, and it can be known from the above that, the adaptation of the first driving wheel and the second driving wheel to the pen sharpening process is mainly realized by making an improvement on the first rotating shaft or the second rotating shaft. The applicant has conducted extensive studies and in the present application will propose a new pen feeding structure which is adapted to the pen sharpening process without the need to be provided on the first rotary shaft and/or the second rotary shaft.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a pencil feeding structure, the structure of the pencil feeding structure adapting to the pencil sharpening process does not need to be arranged on the first rotating shaft and/or the second rotating shaft; still provide a penknife, adopt aforementioned structure of advancing.

Compared with the prior art, the utility model provides an advance a structure, including separation and reunion transmission structure, support, carousel, first pivot, second pivot, first drive wheel and second drive wheel, be equipped with transmission structure between carousel and first pivot, the second pivot, first drive wheel is installed and is driven the rotation by first pivot in first pivot, and the second drive wheel is installed and is driven the rotation by the second pivot in the second pivot, and first drive wheel, second drive wheel are used for driving the pencil and go forward/retreat, separation and reunion transmission structure be connected with the carousel, this separation and reunion transmission structure is used for giving the carousel with power transmission, and the carousel is given first pivot, second pivot with power transmission again.

Preferably, the clutch transmission structure adopts a clutch transmission structure which utilizes friction connection transmission and/or utilizes elastic concave-convex matching connection transmission. After the design, the structure is simple, meanwhile, the semi-linkage state is easy to realize, the transmission state is changed rapidly and responds quickly, so that the change of the pen feeding speed is met, the semi-linkage state is a slipping state, and the structure can also be said to be the state easy to realize slipping.

Preferably, the clutch transmission structure adopts a closed design. Because not setting up in first pivot and/or second pivot, so can make separation and reunion transmission structure adopt closed design, consequently, design back like this, be favorable to reducing by the pollutant pollution's such as lead core foam possibility, avoid by pollutant pollution such as lead core foam to greatly reduce the separation and reunion transmission structure possibility of skidding or card dead in the structure, thereby guarantee durability and reliability.

Preferably, the three-layer structure is sequentially arranged, the first layer is a clutch transmission structure, the second layer is a turntable, and the third layer is a driving part formed by the first rotating shaft and the second rotating shaft. After the design, simple structure is compact, the convenient overall arrangement, and in addition, power transmission path is shorter, is favorable to promoting transmission efficiency.

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, 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 turntable to rotate. Generally speaking, the power input is the tool rest of the pencil sharpening mechanism, because when the pencil is sharpened, the tool rest is in a rotating state, and the tool rest is driven by the rotation of the tool rest and can be linked with the pencil sharpening work, so that after the design of the improvement, the layout of the pencil sharpening mechanism is facilitated on one hand, and the power transmission path is shortened on the other hand, so that the transmission efficiency is improved.

Preferably, the pen insertion holes sequentially pass through the three layers to reach the sharpening mechanism of the pencil sharpener. After designing like this, be favorable to three layer construction along inserting a compact design of direction on the one hand to be favorable to shortening power transmission path, and then promote transmission efficiency, on the other hand conveniently cuts the arrangement of a mechanism, the hole of inserting a pen, promotes overall structure's compactedness.

Preferably, the clutch transmission structure comprises a first transmission part and a second transmission part, the first transmission part and the second transmission part are in clutch connection, the second transmission part is connected with the turntable, the first transmission part is used for inputting power and driving the second transmission part to rotate through clutch connection, and the second transmission part is used for outputting power to the turntable. After the design, spare part is less, is favorable to simple structure compactness.

Preferably, the first transmission member and the second transmission member are axially sleeved. After the design, be favorable to separation and reunion transmission structure to realize the platykurtic design, that is to say be favorable to controlling the axial dimension of separation and reunion transmission structure.

Preferably, a clutch member is arranged between an inner peripheral wall surface of the first transmission member and an outer peripheral wall surface of the second transmission member, the clutch member is supported between the inner peripheral wall surface of the first transmission member and the outer peripheral wall surface of the second transmission member, and the clutch member is used for transmitting power between the first transmission member and the second transmission member. After the design, the transmission force is stronger, which is beneficial to the stable and reliable transmission work and the good durability.

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. After the design like this, elasticity unsmooth cooperation structure is different from friction structure, takes place relative rotation between concave part and the convex part and needs great power, therefore this improvement makes separation and reunion transmission structure have higher transmission power.

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. After the design, on one hand, the transmission force is higher, and on the other hand, when the first transmission piece and the second transmission piece generate a rotation speed difference, the smoothness of relative rotation of the first transmission piece and the second transmission piece is better, so that the rotation speed change is more fine, and the jumping is reduced.

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. After designing like this, be convenient for on the one hand produce first driving medium, second driving medium, for example adopt injection molding process to make, on the other hand makes things convenient for the assembly between first driving medium and the second driving medium, and the aforesaid improves the back like this, and first driving medium, second driving medium realize the axial more easily and cup joint rotatable fit.

Preferably, the cover covers the first transmission piece, a relatively closed cavity is formed between the cover and the first transmission piece, the cavity contains the second transmission piece, the cover is provided with a through hole, and the second transmission piece is connected with the rotary table through the through hole. After the design, a clutch transmission structure with a closed design is simply realized, and the clutch transmission structure is small in axial size and simple in structure.

Preferably, the second transmission member includes a second rotation shaft portion, the second rotation shaft portion is in clutchable transmission connection with the first transmission member, the second rotation shaft portion is located inside the through hole, and the diameter of the second rotation shaft portion is larger than that of the through hole. After the design like this, on the one hand, because the diameter of second pivot portion is greater than the diameter that passes the hole, so want to reach clutchable transmission connection position with the help of the pollutant that passes the hole, need pass through second pivot portion and pass the clearance between the hole, consequently increased the entering degree of difficulty to be favorable to promoting the closure, on the other hand, can know from the aforesaid, the structure is very simple.

Preferably, the second rotating shaft portion is provided with a recess on the side of the rotating disk, and the diameter of the recess is larger than that of the through hole. After the design, on the one hand, when the pollutant wants to reach the clutchable transmission connecting part by passing through the hole, the pollutant can fall into the recess, so that the entering difficulty is further increased, and the sealing performance is further improved.

Preferably, the diameter of the turntable is greater than the diameter of the through hole. So designed, on the one hand, when the contaminant wants to reach the clutchable drive connection by means of the through hole, the contaminant first has to pass through the gap between the turntable and the annular part of the cover surrounding the through hole, thus further increasing the access difficulty and thus being more beneficial to improving the closure, and on the other hand, as can be seen from the foregoing, the structure is very simple.

Preferably, be equipped with the first axle portion and the second axle portion that link that sets up of protrusion in opposite directions respectively between carousel and the second driving medium, first axle portion links the transmission with second axle portion and cup joints each other to first axle portion inserts in the sunken. After the design like this, on the one hand, because first connecting shaft portion and second connecting shaft portion cup joint the transmission each other, so the driving surface is great, consequently has strengthened the transmission ability, and the structure is durable reliable, on the other hand, because first connecting shaft portion inserts in the sunken, so the axial dimension is less.

Preferably, the side of the cover located at the turntable is provided with a support portion arranged circumferentially around the turntable, which support portion acts as a stand. After the design, the problem of arrangement of the support is solved skillfully, and the support and the cover are made into a component, so that the structure is simple and compact, and the production and assembly are convenient.

Preferably, the side of the cover located on 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. After the design like this, the annular perisporium can be done certain rotation support to the carousel, is favorable to the rotational stability of carousel on the one hand, and on the other hand is owing to have the normal running fit of annular perisporium, so the carousel need not do too thickly, is favorable to reducing the size, and on the other hand, owing to have the normal running fit of annular perisporium, so the carousel can bear great power, when bearing great power, also can not take place the problem of horizontal off tracking.

Preferably, a first rotating shaft part and a first rotating shaft matching hole are arranged between the first transmission piece and the second transmission piece, the first rotating shaft part and the first rotating shaft matching hole are rotatably sleeved to form a rotating part capable of rotating relatively, or a first rotating shaft part and a third rotating shaft part are arranged between the first transmission piece and the second transmission piece, and a through hole of the first rotating shaft part and the third rotating shaft part are rotatably sleeved to form the rotating part; a section of the pen inserting hole penetrates through the rotating part to reach the side, far away from the rotary disc, of the first transmission piece. After the design like this, on the one hand, owing to first pivot portion and the rotatable cup jointing of first pivot mating holes, perhaps the through-hole of first pivot portion and the rotatable cup jointing of third pivot portion, so be favorable to the rotational stability between first driving medium and the second driving medium, on the other hand owing to rotatable cup joint, also make things convenient for the assembly between first driving medium and the second driving medium, as long as with the help of rotatable cup joint axial cooperation can.

Preferably, the first transmission member is provided with a first rotating shaft portion protruding toward the second transmission member on the side thereof located on the second transmission member, and the second transmission member is provided with a first rotating shaft fitting hole or a third rotating shaft portion on the side thereof located on the first rotating shaft portion. After the design, the axial size is favorably controlled, so that the clutch transmission structure is flatter.

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. After the design, when the pollutants at one end of the pencil sharpening mechanism want to enter the convex part and the concave part matched annular cavity, the pollutants can be blocked by the annular part, so that the entering difficulty is increased, and the sealing performance is improved.

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. After the design, when the pollutants at one end of the pencil sharpening mechanism want to enter the convex part and the concave part matched annular cavity, the pollutants need to pass through the gap between the annular part and the side face, so that the entering difficulty is further increased, the sealing performance is further improved, and on the other hand, the structure is very simple.

Preferably, the first shaft portion is provided with an insertion hole for connecting a power input end. After the design, be favorable to controlling axial dimension, effectively utilize the space that first pivot portion occupied.

Preferably, the first transmission piece comprises a bottom wall and a cylindrical peripheral wall, and the outer end face of the bottom wall is used as an axial positioning face which is used for being connected with the power input end in an axial positioning mode. After the design, be favorable to convenient assembly, that is to say, when the penknife is packed into, first driving piece suit is at the power input end, and the installation is very convenient.

Preferably, the section of the pen insertion hole penetrating through the first transmission piece and the second transmission piece is marked as a lower section, and the diameter of the section of the pen insertion hole penetrating through the rotary disc part is equal to or smaller than the diameter of the lower section. After the design, pollutants are difficult to enter from the joint between the section of the pen inserting hole penetrating through the rotary disc part and the lower section, and the sealing performance of the clutch transmission structure is improved.

Preferably, 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.

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, the separation and reunion transmission structure that sets up is connected with the carousel, this separation and reunion transmission structure is used for transmitting power for the carousel, the carousel is transmitted power for first pivot again, the second pivot, therefore, on the one hand, power is with the help of separation and reunion transmission structure, a speed change has been produced in carousel department, thereby realize advancing a structure adaptation and cut a process, irrelevant with first pivot and/or second pivot, on the other hand, the carousel can be designed for all the time with first pivot and the good meshing of second pivot, guaranteed the power transmission between carousel and first pivot and the second pivot, on the other hand, first pivot and/or second pivot need not to design the structure for setting up separation and reunion transmission structure, complicated designs such as increase size, consequently, the structure of first pivot and second pivot has been simplified, on the other hand, adopt the utility model discloses a scheme, separation and reunion transmission structure is owing to not be subject to first pivot and/or second pivot, so the size of separation and reunion transmission structure can be done great, be favorable to promote the ability, durability and reliability, consequently, the utility model discloses a specific substantive technique has distinguished in the present technology.

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 removed.

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

Fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A.

Fig. 5 is a perspective view of fig. 3 with the inner cover removed.

Fig. 6 is a perspective view of fig. 5 with the first and second rotating shafts removed.

Fig. 7 is a perspective view of fig. 6 with the turntable removed.

Fig. 8 is a perspective view of fig. 7 with the cover removed.

Fig. 9 is a perspective view of fig. 8 with the first transmission member and the second transmission member removed.

Fig. 10 is an exploded view of a clutch transmission configuration.

Fig. 11 is an exploded view of fig. 10 shown from a bottom perspective.

Fig. 12 is a top view of a clutch transmission structure.

FIG. 13 is a sectional view taken along line B-B.

Fig. 14 is a perspective view of another clutch transmission structure.

Fig. 15 is an exploded view of another clutch transmission configuration.

Fig. 16 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-cover, 17.1-supporting part, 18-top cover, 19-inner cover, 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 rotary 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-insertion hole, 37-output gear, 38-gear driving structure, 39-movable tongue part, 40-movable tongue part, 41-tapered switch, 42-tapered pen-cutting mold and friction input end face.

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 underlying 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:

fig. 1 shows a pencil sharpener, which comprises a housing 1, a pencil sharpening mechanism and the pencil feeding structure of the present invention, wherein the pencil feeding structure and the pencil sharpening mechanism are distributed up and down according to the up-down direction shown in fig. 1, the top end of the housing 1 is provided with an insertion opening of a pencil insertion hole 10, the insertion opening is used as a component of the whole hole section of the pencil insertion hole 10, the pencil sharpening mechanism is provided with a knife rest 33 and a knife 32, the knife rest 33 is provided with a pencil sharpening tapered mold 41, the knife 32 is connected with the knife rest 33 and rotates along with the knife rest 33, the rotation enables the knife 32 to sharpen a pencil inserted in the pencil sharpening tapered mold 41, the rotation of the knife rest 33 can adopt a manual driving scheme or an electric driving scheme, in this example, an electric driving scheme is mainly used, that the knife rest 33 is driven by an electric motor.

As shown in fig. 2 to 9, 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.

The casing 1 sequentially comprises a top cover 18 and an inner cover 19 from top to bottom, a movable tongue 39 is arranged between the top cover 18 and the inner cover 19, and the inner side of the inner cover 19 is further provided with a first rotating shaft 3, a second rotating shaft 4 and other related pen feeding structures.

As shown in fig. 4 to 9, the pencil feeding structure includes a clutch transmission structure, a bracket, a rotary disc 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 disc 2 and the first rotary shaft 3, and between the rotary disc 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, the second driving wheel 8 is installed on the second rotary shaft 4 and driven by the second rotary shaft 4, the first driving wheel 7 and the second driving wheel 8 are used for driving the pencil to move forward/backward, the clutch transmission structure is connected with the rotary disc 2, the clutch transmission structure is used for transmitting power to the rotary disc 2, and the rotary disc 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 complex structure and/or increased costs and/or complex production set-up.

Preferably, as shown in fig. 2 to 4, the pen feeding structure is arranged on the upper side of the pen cutting mechanism as an independent module, and the pen feeding structure is divided into 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 far away from the second layer, 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 turntable 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. 10 to 13 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 application is generated, and the pencil entering structure 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, and when the acting force of the second transmission member 12 is increased due to the pen feeding obstruction, 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 matched resistance of the concave part 14 and the convex part 15, so that the pen feeding structure can adapt to the pen sharpening process.

As shown in fig. 10 and 12, 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, further comprises a cover 17, the cover 17 covers the first transmission member 11, a relatively closed cavity is formed between the cover 17 and the first transmission member 11, the cavity receives the second transmission member 12, the cover 17 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 arranged between the rotary disc 2 and the second transmission piece 12 and are oppositely and convexly arranged, the first connecting shaft portion 23 and the second connecting shaft portion 24 are in sleeve connection transmission with each other, 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 further simplified, increasing the compactness of the structure, for example as shown in fig. 5 to 7, the side of the cover 17 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.

The turntable 2 can be further made more stable in rotation by a further development of the applicant, for example, as shown in fig. 6 and 7, the side of the cover 17 on the turntable 2 is provided with an annular peripheral wall 25 disposed around the circumference of the turntable 2, the annular peripheral wall 25 being in rotatable engagement with the turntable 2 in the circumferential direction.

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 pen insertion hole 10 is arranged 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, 10 and 13, 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 head.

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, 11 and 13, 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.

Since the pencil feeding mechanism is connected to the pencil sharpening conical mold 41, the pencil is designed to be compactly connected, so that the pencil can be inserted into the pencil sharpening conical mold 41 immediately after being conveyed by the pencil feeding mechanism, and therefore, the opening of the pencil sharpening conical mold 41 is inserted into the insertion hole 36, and lead dust may leak from the connection position to the outside, so that the present applicant further improves to solve the aforementioned problem, so that the connection is compact and the sealing design is facilitated, specifically, the first transmission member 11 includes a bottom wall and a cylindrical peripheral wall, an outer end surface 29 of the bottom wall serves as an axial positioning surface, the pencil sharpening conical mold 41 is provided with a circumferential portion, and the axial positioning surface is connected with the circumferential portion in an axial positioning manner, which facilitates assembly on the one hand, and on the other hand, the circumferential portion is arranged in a fitting manner with the axial positioning surface, and the fitting is favorable for preventing leakage, in addition, the annular portion 28 is combined with an annular end surface around the third rotating shaft portion 27 in a fitting manner, and the third rotating shaft portion 27 is inserted into a through hole of the first rotating shaft portion 26, thereby better preventing leakage at the connection position.

By means of a further development of the applicant, it is possible to further improve the closed design, for example, as shown in fig. 4, the section of the pen insertion hole 10 passing through the first transmission member 11 and the second transmission member 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, fig. 10 to 13 show a clutch transmission structure, which 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 elastically swingable, a corresponding recessed portion 14 is disposed on an inner peripheral 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 swing is more easily generated, so that the protruding portion 15 is easily separated from the recessed portion 14 and enters an adjacent next recessed portion 14, and therefore, the protruding portion is not easily jammed or jammed.

As shown in fig. 14 and 15, 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 centrally provided, a corresponding concave portion 14 is provided on an inner peripheral 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 other clutch transmission structure can also be provided with a transition section 16, and the transition section 16 can also be used as a friction part.

Fig. 16 shows another clutch transmission structure, compared with the two foregoing 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 a 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 (28)

1. The utility model provides a advance a structure, includes separation and reunion transmission structure, and a support, carousel (2), first pivot (3), second pivot (4), first drive wheel (7) and second drive wheel (8), be equipped with transmission structure between carousel (2) and first pivot (3), second pivot (4), first drive wheel (7) are installed and are driven the rotation by first pivot (3) on first pivot (3), second drive wheel (8) are installed and are driven the rotation by second pivot (4) on second pivot (4), first drive wheel (7), second drive wheel (8) are used for driving the pencil and advance/retreat, a serial communication port, separation and reunion transmission structure be connected with carousel (2), this separation and reunion transmission structure is used for giving carousel (2) power, carousel (2) give first pivot (3), second pivot (4) with power transmission again.

2. The pen feeding structure according to claim 1, wherein the clutch transmission structure adopts a clutch transmission structure utilizing friction connection transmission and/or elastic concave-convex fit connection transmission.

3. The pen feeding structure of claim 1, wherein the clutch transmission structure is of a closed design.

4. The pen feeding structure according to claim 1, wherein the three layers are sequentially arranged, the first layer is a clutch transmission structure, the second layer is a rotating disc (2), and the third layer is a driving part consisting of a first rotating shaft (3) and a second rotating shaft (4).

5. The pen feeding structure according to claim 4, wherein the power input of the clutch transmission structure is positioned on one side of the first layer far away from the second layer, and the power output of the clutch transmission structure is positioned on the other side of the first layer, and the power output is used for driving the rotating disc (2) to rotate.

6. A pencil feeding structure according to claim 4, characterized in that the insertion hole (10) passes through the three layers in sequence to reach the pencil sharpening mechanism of the pencil sharpener.

7. A pen feeding structure according to claim 1, 2, 3, 4 or 5, wherein the clutch transmission structure comprises 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).

8. A pen feeding structure according to claim 7 wherein the first transmission member (11) and the second transmission member (12) are axially nested.

9. The pen feeding structure according to claim 8, wherein 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).

10. The pen feeding structure according to claim 8, wherein 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 pen feeding resistance, 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 rotate relatively, and the number of the concave part (14) and the convex part (15) is at least one.

11. The structure of the pen feeding device of claim 10, wherein a transition section (16) is arranged between adjacent concave parts (14), the convex part (15) passes through the transition section (16) after coming out of one concave part (14) and then enters another adjacent concave part (14), and when passing through the transition section (16), the transition section (16) is elastically abutted with the convex part (15) and can slide relatively.

12. The writing structure according to claim 10, 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).

13. A pen inlet structure according to claim 7, further comprising a cover (17), wherein the cover (17) covers the first transmission member (11), a relatively closed cavity is formed between the cover (17) and the first transmission member (11), the cavity accommodates the second transmission member (12), and the cover (17) 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).

14. The structure of claim 13, wherein the second transmission member (12) includes 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 that of the through hole (20).

15. A pen inlet structure according to claim 14 wherein the second shaft portion (21) is provided with a recess (22) on the side of the turntable (2), the recess (22) having a diameter greater than the diameter of the through hole (20).

16. A pen inlet structure according to claim 14 wherein the diameter of the dial (2) is greater than the diameter through the aperture (20).

17. A pen feeding structure according to claim 14, wherein a first connecting shaft portion (23) and a second connecting shaft portion (24) are respectively arranged between the rotary plate (2) and the second transmission member (12) and are oppositely protruded, the first connecting shaft portion (23) and the second connecting shaft portion (24) are mutually sleeved and driven, and the first connecting shaft portion (23) is inserted into the recess (22).

18. A pen inlet structure according to claim 13, wherein the side of the cap (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.

19. A pen feeding structure according to claim 13, wherein the side of the cover (17) on the turntable (2) is provided with an annular peripheral wall (25) arranged circumferentially around the turntable (2), the annular peripheral wall (25) being in circumferential rotatable engagement with the turntable (2).

20. The pen feeding structure according to claim 7, wherein a first rotating shaft part (26) and a first rotating shaft matching hole are arranged between the first transmission piece (11) and the second transmission piece (12), the first rotating shaft part (26) is rotatably sleeved with the first rotating shaft matching hole to form a rotating part capable of rotating relatively, or a first rotating shaft part (26) and a third rotating shaft part (27) are arranged between the first transmission piece (11) and the second transmission piece (12), and a through hole of the first rotating shaft part (26) is rotatably sleeved with the third rotating shaft part (27) to form the rotating part; a section of the pen inserting hole (10) penetrates through the rotating part to reach the side, far away from the rotary disc (2), of the first transmission piece (11).

21. A pen inlet structure according to claim 20, wherein the side of the first transmission member (11) on the second transmission member (12) is provided with a first rotating shaft portion (26) provided to protrude toward the second transmission member (12), and the side of the second transmission member (12) on the first rotating shaft portion (26) is provided with a first rotating shaft fitting hole or a third rotating shaft portion (27).

22. A pencil feeding structure according to claim 21, characterized in that the end surface of the first shaft portion (26) is provided with a ring portion (28) around the pencil insertion hole (10), the ring portion (28) serving as a barrier against pencil lead dust.

23. A pen inlet structure according to claim 22 wherein the end face of the annular portion (28) is in rotatable engagement with the side face of the second drive member (12) on the side of the first shaft portion (26).

24. A pen inlet structure according to claim 21 wherein the first shaft portion (26) is provided with a socket (36) for connection to a power input (42).

25. A pen inlet structure according to claim 24 wherein the first transmission member (11) comprises a base wall and a cylindrical peripheral wall, the outer end face (29) of the base wall serving as an axial locating face for axial locating connection with the power input (42).

26. The writing structure according to claim 7, characterized in that the section of the writing hole (10) passing through the first transmission member (11) and the second transmission member (12) is referred to as a lower section (30), and the section of the writing hole (10) passing through the turntable (2) has a diameter equal to or smaller than the diameter of the lower section (30).

27. A pencil advancing structure as claimed in claim 1, 2, 3, 4 or 5, wherein the pencil advancing/retracting axis is the same as the rotation axis of the clutch transmission structure.

28. A pencil sharpener employing the pencil feeding structure of any one of claims 1 to 27, comprising a housing (1) and a pencil sharpening mechanism, characterized by further comprising said pencil feeding structure.

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