CN110370840B

CN110370840B - Propelling pencil

Info

Publication number: CN110370840B
Application number: CN201910654980.XA
Authority: CN
Inventors: 韩爱国; 郭礼庚; 程小青
Original assignee: Wenzhou Tianjiao Pen Industrial Co ltd
Current assignee: Wenzhou Tianjiao Pen Industrial Co ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2022-06-07
Anticipated expiration: 2039-07-19
Also published as: CN110370840A

Abstract

The invention relates to a propelling pencil, which comprises a penholder component and a pencil lead component arranged in the penholder component, wherein the pencil lead component is connected with a rotating body in a circumferential linkage manner, a holding sleeve for holding by a hand during writing is arranged outside the penholder component, the holding sleeve can axially move in a certain range relative to the penholder component, a driving mechanism is arranged between the holding sleeve and the rotating body, the driving mechanism converts the axial reciprocating motion of the holding sleeve into the rotating motion of the rotating body and transmits the rotating motion to the pencil lead component to rotate a pencil lead, meanwhile, the front end of the penholder component is provided with a pencil lead sheath, and the pencil lead sheath and the holding sleeve have a linkage structure. The structure utilizes the holding sleeve as a power source to drive the refill assembly to rotate and the refill sheath to extend out of the core, thereby achieving the functions of automatically rotating and protecting the core and simultaneously achieving the purpose of simplifying the structure.

Description

Propelling pencil

Technical Field

The invention relates to a mechanical pencil.

Background

When writing with a mechanical pencil, people are often used to hold the pencil shaft obliquely. Therefore, under the condition that the penholder does not rotate, the front end of the pen core can be ground into an inclined plane, so that the writing marks become thicker gradually. Meanwhile, the density of the pen mark is changed from the density due to the change of the pressure. Furthermore, as writing continues, the edges of the markings become less sharp. In order to write uniform and beautiful pen marks, people need to continuously rotate the pen holder, which is inconvenient.

In order to solve the above problems, chinese patent CN101460314A is an improvement on the conventional mechanical pencil, in which a rotating body with upper and lower cam surfaces is arranged in the pencil holder assembly, and a corresponding fixed cam surface is arranged at the position opposite to the upper and lower cam surfaces, the rotating body can move between the upper and lower fixed cam surfaces, and the engaging positions of the upper and lower cam surfaces of the rotating body and the upper and lower fixed cam surfaces are staggered by half phase, and the rotating body is fixedly connected to the clamping component in the pencil lead assembly.

Thus, when writing, the rotary body moves back and forth between the upper and lower fixed cam surfaces in accordance with the application and release of writing pressure applied to the pen core, and is engaged with the upper and lower fixed cam surfaces alternately in sequence. Because the engaging positions of the upper cam surface and the lower cam surface of the rotating body and the upper fixed cam surface and the lower fixed cam surface are staggered by half phase, the rotating body rotates in the process that the rotating body moves back and forth and is alternately engaged, and the clamping component and the pen core are driven to rotate. The principle of the automatic rotation of the rotating body is described in detail in the above-mentioned document.

The propelling pencil of above-mentioned structure is when writing, and the refill subassembly can be for the continuous axial telescopic movement of pen-holder subassembly, and especially when the rise of writing and the pen that falls, the flexible refill subassembly can make the refill when writing have the action of an adhesion, leads to the fact unsmoothly to writing. Moreover, the head of the front end of the pen core moves during writing, and the position of pen falling cannot be accurately controlled.

In addition, when the mechanical pencil is used for writing, people are used to hold the penholder obliquely. Therefore, the pen core at the front end of the pen holder assembly is easily broken under the condition of more exposed pen cores.

In order to solve the above problems, chinese patent CN104742576A is an improvement on the basis of the conventional mechanical pencil, the front end of the pencil lead sheath is arranged in a spindle shape, and the opening at the front end of the pencil holder assembly is in contact with the surface of the spindle-shaped pencil lead sheath to make the pencil lead sheath extend out to the front end during writing, thereby shortening the exposed length of the pencil lead and achieving the purpose of protecting the pencil lead during writing.

However, the mechanical pencil with the above structure also needs a complex mechanism to make the whole pencil lead assembly deflect, shift the pencil holder, make writing unstable, and make the stroke length difficult to control, so the structure is complex and the manufacturing cost is high.

In the prior art, other structures can realize the automatic core rotating and protecting functions, but the automatic pencil needs to adopt two relatively independent different structures to realize the automatic core rotating and protecting functions. If the two functions are required to be simultaneously realized in one mechanical pencil, two structures which are not related to each other need to be simultaneously applied to one mechanical pencil. Thus, the components of the mechanical pencil can be manufactured with a much higher precision in the limited space available for the mechanical pencil than if a single functional structure were used. Even, two structures cannot be accommodated simultaneously on a single pencil.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides the mechanical pencil with the automatic core rotating and protecting functions.

The pen refill assembly comprises a pen holder assembly and a pen refill assembly arranged in the pen holder assembly, and the pen refill assembly is characterized in that the pen refill assembly is connected with a rotating body in a circumferential linkage manner, a holding sleeve for holding by a hand during writing is arranged outside the pen holder assembly, the holding sleeve can axially move in a certain range relative to the pen holder assembly, a driving mechanism is arranged between the holding sleeve and the rotating body, the driving mechanism converts axial reciprocating motion of the holding sleeve into rotary motion of the rotating body and transmits the rotary motion to the pen refill assembly to rotate the pen refill, meanwhile, a pen refill protecting sleeve is arranged at the front end of the pen holder assembly, and the pen refill protecting sleeve and the holding sleeve have a linkage structure.

The structure utilizes the writing pressure acting on the holding sleeve during writing to enable the holding sleeve to move downwards, and cancels the writing pressure on the holding sleeve to enable the holding sleeve to move upwards when the pen is lifted, the axial reciprocating movement of the holding sleeve enables the rotating body to rotate through the driving mechanism, so as to drive the pen core assembly to rotate, meanwhile, the holding sleeve moves downwards when writing, and can drive the pen core sheath to move downwards through the linkage structure, so that the length of the exposed pen core is shortened, and the purpose of protecting the pen core from being broken easily and protecting the pen core is achieved.

The structure utilizes the holding sleeve as a power source to drive the refill assembly to rotate and the refill sheath to extend out of the core, thereby achieving the functions of automatically rotating and protecting the core and simultaneously achieving the purpose of simplifying the structure.

The driving mechanism comprises an upper cam surface and a lower cam surface which are arranged on the upper surface and the lower surface of a rotating body, corresponding upper movable cam surfaces and corresponding lower movable cam surfaces are respectively arranged at positions opposite to the upper cam surfaces and the lower cam surfaces, the meshing positions of the upper cam surfaces and the lower cam surfaces of the rotating body and the upper movable cam surfaces and the lower movable cam surfaces are staggered by less than one phase, the rotating body is arranged between the upper movable cam surfaces and the lower movable cam surfaces, the upper movable cam surfaces and the lower movable cam surfaces are in linkage connection with the grip sleeve, and the upper movable cam surfaces and the lower movable cam surfaces of the rotating body are alternately meshed with the upper cam surfaces and the lower cam surfaces of the rotating body along with the axial movement of the grip sleeve.

The upper end surface of the rotating body is provided with an upper cam surface, the upper cam surface corresponds to the upper movable cam surface, and the upper movable cam surface is arranged on the upper movable cam body; the lower end face of the rotating body is provided with a lower cam face which corresponds to the lower movable cam face, and the lower movable cam face is arranged on the lower movable cam body.

The further technical solution of the invention is as follows: the upper movable cam body and the lower movable cam body are fixedly connected into an integral structure through the connecting pin to form a movable gear sleeve, so that the rotating body is accommodated between the upper movable cam body and the lower movable cam body and has a certain gap, and the holding sleeve is in linkage connection with the movable gear sleeve.

The further technical solution of the invention is as follows: the lower end of the movable gear sleeve is abutted against the refill sheath, and meanwhile, the refill sheath resetting mechanism is arranged and acts on the refill sheath to enable the refill sheath to move upwards.

The further technical solution of the invention is: the movable gear sleeve is provided with a movable gear sleeve reset mechanism which enables the movable gear sleeve and the holding sleeve to move upwards.

When writing pressure is applied to the grip sleeve, the lug pushes the movable gear sleeve to enable the movable gear sleeve to move downwards. The movable gear sleeve resetting mechanism can enable the movable gear sleeve and the holding sleeve to move upwards when the writing pressure on the holding sleeve is relieved.

The further technical solution of the invention is as follows: the movable cam body at one end is set into a discontinuous split form, and meanwhile, a material with certain elasticity is used for manufacturing the whole movable gear sleeve or the connecting foot part on the movable gear sleeve.

The further technical solution of the invention is as follows: the movable cam body at one end and the connecting foot are arranged into a buckling structure.

The further technical solution of the invention is as follows: the number of the connecting pins is two, and the two connecting pins are respectively positioned at symmetrical positions outside the rotating body.

The further technical solution of the invention is as follows: the penholder assembly is provided with an axial slot corresponding to the position of the lug, the slot can accommodate the lug to enter or pass through the slot, and meanwhile, the slot has a certain axial space and can allow the lug to axially move in the slot within a certain range.

Drawings

The invention is further elucidated with reference to the drawings and the embodiments;

FIG. 1: the overall appearance of the embodiment is schematically shown;

FIG. 2: the structure of the embodiment is schematically shown;

FIG. 3: FIG. 2 is an enlarged fragmentary view of the writing end;

FIG. 4: FIG. 2 is an enlarged view of a portion of the end of the cap;

FIG. 5: a schematic structural view of a rotor part according to the first embodiment;

FIG. 6: the structure of the movable gear sleeve of the first embodiment is schematic;

FIG. 7: a schematic structural view of a rotor part according to the second embodiment;

FIG. 8: the working state of the cam surface between the rotating body and the corresponding movable cam body is I;

FIG. 9: the working state of the cam surface between the rotating body and the corresponding movable cam body is II;

FIG. 10: the working state of the cam surface between the rotating body and the corresponding movable cam body is III;

FIG. 11: the working state of the cam surface between the rotating body and the corresponding movable cam body is four;

FIG. 12: the working state of the cam surface between the rotating body and the corresponding movable cam body is five;

FIG. 13: a partial structure schematic diagram of the penholder assembly;

FIG. 14 is a schematic view of: FIG. 13 is a side view;

FIG. 15: the structure of the grip sleeve locking mechanism is partially removed.

Detailed Description

As shown in the figure, the pen comprises a pen holder component 1 and a pen core component 2 arranged in the pen holder component 1, wherein the pen core component 2 is connected with a rotating body 3 in a circumferential linkage mode, a holding sleeve 4 for holding by a hand during writing is arranged outside the pen holder component 1, the holding sleeve 4 can axially move in a certain range relative to the pen holder component 1, and a driving mechanism is arranged between the holding sleeve 4 and the rotating body 3, converts the axial reciprocating motion of the holding sleeve 4 into the rotating motion of the rotating body 3 and transmits the rotating motion to the pen core component 2 to enable the pen core to rotate. Meanwhile, the front end of the penholder component 1 is provided with a refill sheath 15, and the refill sheath 15 and the holding sleeve 4 have a linkage structure.

The driving mechanism comprises an upper cam surface 3a and a lower cam surface 3b which are arranged on the upper surface and the lower surface of a rotating body 3, an upper movable cam surface 5a and a lower movable cam surface 6a which are respectively arranged at the positions opposite to the upper cam surface 3a and the lower cam surface 3b, the engaging positions of the upper cam surface 3a and the lower cam surface 3b of the rotating body and the upper movable cam surface 5a and the lower cam surface 6a are staggered by less than one phase, the rotating body 3 is arranged between the upper movable cam surface 5a and the lower movable cam surface 6a, the upper movable cam surface 5a and the lower movable cam surface 6a are in linkage connection with a holding sleeve 4, and the upper movable cam surface 5a and the lower movable cam surface 6a are alternately engaged with the upper cam surface 3a and the lower cam surface 3b of the rotating body along with the axial movement of the holding sleeve 4.

Provided on the upper end face of the rotary body 3 is an upper cam face 3a, the upper cam face 3a corresponding to the upper movable cam face 5a, the upper movable cam face 5a being provided on the upper movable cam body 5; provided on the lower end surface of the rotary body 3 is a lower cam surface 3b, the lower cam surface 3b corresponding to a lower movable cam surface 6a, and the lower movable cam surface 6a provided on the lower movable cam body 6.

When the upper cam faces 3a are in contact with the upper movable cam faces 5a, the lower cam faces 3b and the lower movable cam faces 6a are separated from each other without interfering with each other; when the lower cam surface 3b is in contact with the lower movable cam surface 6a, the upper cam surface 3a and the upper movable cam surface 5a are separated from each other without interfering with each other.

In order to realize the arrangement of the mutual alternate meshing of the cam surfaces, the upper movable cam body 5 and the lower movable cam body 6 are fixedly connected into an integral structure through the connecting foot 7 to form a movable gear sleeve 10, so that the rotating body 3 is accommodated between the upper movable cam body 5 and the lower movable cam body 6 and has a certain gap, and the grip sleeve 4 is in linkage connection with the movable gear sleeve 10. In this configuration, the upper movable cam surface 5a and the lower movable cam surface 6a can be moved together in synchronization by driving the movable sleeve 10. The specific structure can be as follows: a convex block 41 extending into the penholder component 1 is arranged on the holding sleeve 4, and the convex block 41 is abutted against the movable gear sleeve 10, so that the movable gear sleeve 10 is pushed by the convex block 41 to enable the movable gear sleeve 10 to move downwards when writing pressure is applied to the holding sleeve 4; in addition, a movable sleeve return mechanism is provided which acts on the movable sleeve 10 or its associated part and which moves the movable sleeve 10 and the grip sleeve 4 upwardly, and which moves the movable sleeve 10 and the grip sleeve 4 upwardly when the writing pressure on the grip sleeve 4 is released.

Since there is a phase difference between the position of engagement of the upper movable cam surface 5a with the upper cam surface 3a and the position of engagement of the lower movable cam surface 6a with the lower cam surface 3b, there is a certain requirement for the relative position between the upper and lower

movable cam bodies

5, 6. After the upper and lower

movable cam bodies

5, 6 are integrally and fixedly connected, the relative positions of the upper and lower

movable cam bodies

5, 6 are relatively fixed. However, the upper and lower

movable cam bodies

5 and 6 are integrally fixed to each other, and there is a problem that when the rotary body 3 is to be mounted at the intermediate position in the axial direction of the upper and lower

movable cam bodies

5 and 6, the size of the rotary body 3 is larger than the size of the mounting space outside the movable sleeve 10 formed by integrally fixing the upper and lower

movable cam bodies

5 and 6 to each other.

Thus, at least the following two embodiments are required.

The first implementation mode comprises the following steps: the movable cam body at one end is arranged in a discontinuous split form, and meanwhile, a certain elastic material is used for manufacturing the whole movable gear sleeve 10 or the connecting foot 7 part on the movable gear sleeve 10, so that the movable gear sleeve 10 can be opened from the discontinuous movable cam body at the end. During assembly, the rotor 3 is inserted into the middle of the movable gear sleeve 10 from the opened opening, and the opened cam body is returned to the state of being engaged with the rotor 3 by the elastic return of the connecting leg 7.

The discontinuous movable cam body in this embodiment may be the upper movable cam body 5 or the lower movable cam body 6.

Since only part of the cam surfaces are engaged, fewer engaging surfaces means that the requirement for the machining accuracy of the movable cam body of this part is higher.

The second embodiment: the movable cam body at one end and the connecting foot 7 are arranged into a buckling structure. Thus, before being buckled with each other, one movable cam body is independent, the rotating body 3 can be conveniently placed in the half movable gear sleeve 10 with one end being freely opened, and then the independent movable cam body is sealed at the opened end through the buckling structure, so that the closing of the upper end and the lower end of the rotating body 3 is completed.

In this embodiment, the movable cam body engaged with the connection leg 7 may be the upper movable cam body 5, the lower movable cam body 6, or both the upper and lower

movable cam bodies

5 and 6 may be engaged with the connection leg 7.

In this embodiment, all cam surfaces can be kept intact and continuous, thus providing better engagement accuracy. However, the snap-fit structure is arranged in a very small size range, and the manufacturing difficulty is certain.

With each of the above embodiments, the machining of non-continuous cam surfaces or portions of cam surfaces is more difficult. The larger the area of contact between two mating cam surfaces, the more local manufacturing or assembly errors will be corrected by the rest. Thus, the more complete, the larger the cam surface the less demanding its manufacturing accuracy will be.

Next, the conversion process of the movement will be specifically described by describing the cam surface between the rotating body 3 and the movable cam body corresponding thereto.

As shown in the figure, the engagement surface formed between the upper cam surface 3a and the upper movable cam surface 5a is formed by a plurality of continuous upper undulation units, and the engagement surface formed between the lower cam surface 3b and the lower movable cam surface 6a is formed by a plurality of continuous lower undulation units. The shapes of the upper undulating means on the upper cam surface 3a and the upper movable cam surface 5a may be the same as or different from the shapes of the lower undulating means on the lower cam surface 3b and the lower movable cam surface 6a, but the phase angle occupied by the individual undulating means on the upper cam surface 3a and the upper movable cam surface 5a is the same as the phase angle occupied by the individual undulating means on the lower cam surface 3b and the lower movable cam surface 6 a.

The position of engagement between the upper cam surface 3a and the upper movable cam surface 5a and the position of engagement between the lower cam surface 3b and the lower movable cam surface 6a are shifted by less than one phase. That is, when the upper cam faces 3a and the upper movable cam faces 5a are completely engaged, the lower cam faces 3b and the lower movable cam faces 6a are not in the completely engaged position; when the lower cam surface 3b is fully engaged with the lower movable cam surface 6a, the upper cam surface 3a and the upper movable cam surface 5a are not in the fully engaged position.

Fig. 8 shows a state in which the upper and lower

movable cam bodies

5 and 6 are oriented upward, and in this state, the lower movable cam surface 6a completely engages with the lower cam surface 3b of the rotary body 3, and at this time, the upper movable cam surface 5a is spaced apart from the upper cam surface 3a of the rotary body 3 by a predetermined distance, and the upper movable cam surface 5a and the upper cam surface 3a are positioned at positions of incomplete engagement.

Fig. 9 shows that the upper and lower

movable cam bodies

5 and 6 move downward from the upper state, in which the lower movable cam surface 6a is separated from the lower cam surface 3b, the upper movable cam surface 5a is in contact with the upper cam surface 3a, and since the relative positions in the circumferential direction are not changed, the upper movable cam surface 5a and the upper cam surface 3a are still in the incomplete engagement position, and the undulation elements on the upper movable cam surface 5a have a state in which the slopes of the corresponding undulation elements on the upper cam surface 3a are in contact with each other.

Fig. 10 shows that as the upper and lower

movable cam bodies

5 and 6 continue to move downward from the state of the upper drawing, the slopes on the undulating units on the upper movable cam surface 5a exert pressure on the corresponding slopes on the undulating units on the upper cam surface 3a, so that the upper cam surface 3a is caused to shift circumferentially, that is, the rotary body 3 is caused to rotate circumferentially, and finally the upper movable cam surface 5a and the upper cam surface 3a are completely engaged. Meanwhile, the lower movable cam surface 6a is axially separated from the lower cam surface 3b of the rotary body 3 by a certain distance, and the lower movable cam surface 6a and the lower cam surface 3b are in a position of incomplete engagement.

Fig. 11 shows that the upper and lower

movable cam bodies

5 and 6 are moved upward from the upper state, in which the upper movable cam surface 5a is separated from the upper cam surface 3a, the lower movable cam surface 6a is in contact with the lower cam surface 3b, and since the relative positions in the circumferential direction are not changed, the cam surfaces on the lower movable cam surface 6a and the lower cam surface 3b are still at positions of incomplete engagement, and the undulating units on the lower movable cam surface 6a have an inclined surface which is in contact with the corresponding inclined surface on the undulating units on the lower cam surface 3 b.

Fig. 12 shows that as the upper and lower

movable cam bodies

5 and 6 continue to move upward from the upper view state, the inclined surfaces of the undulating means on the lower movable cam surface 6a exert pressure on the corresponding inclined surfaces of the undulating means on the lower cam surface 3b, so as to cause the lower cam surface 3b to shift circumferentially, i.e., cause the rotary body 3 to rotate circumferentially, and finally cause the lower movable cam surface 6a and the lower cam surface 3b to be completely engaged. Meanwhile, the upper movable cam surface 5a is axially separated from the upper cam surface 3a of the rotary body 3 by a certain distance, and the upper movable cam surface 5a and the upper cam surface 3a are in a position of incomplete engagement.

The positions of engagement between the upper cam surface 3a and the upper movable cam surface 5a and the positions of engagement between the lower cam surface 3b and the lower movable cam surface 6a are different from each other, and are in a fixed relationship with the shapes of the engagement surfaces of the upper and

lower cam surfaces

3a, 3 b. In general, a half-phase shift can be applied to most of the shapes of the meshing surfaces. However, more desirable conditions are: when the grip sleeve 4 is applied with force downwards for writing, the rotating angle of the rotating body 3 is a little smaller, and when the grip sleeve 4 is released from the force, the rotating angle of the rotating body 3 is a little larger, so that the rotation of the pen core can be completed as much as possible in the process of lifting the pen, and the writing cannot be influenced too much as possible when the pen is dropped for writing.

To achieve the above effect, when the lower cam surface 3b is completely engaged with the lower movable cam surface 6a, the engagement position differs from the engagement position of the upper cam surface 3a with the upper movable cam surface 5a by less than half a phase. That is, when the lower cam surface 3b and the lower movable cam surface 6a are completely engaged, the relative position of the rotor 3 and the upper cam surface 3a needs to be rotated to a position where the upper cam surface 3a and the upper movable cam surface 5a are completely engaged and the rotor 3 is rotated by less than half a phase. Accordingly, when the upper cam surfaces 3a and the upper movable cam surfaces 5a are completely engaged, the relative positions of the rotary body 3 and the lower cam surfaces 3b need to be rotated to a position where the lower cam surfaces 3b and the lower movable cam surfaces 6a are completely engaged, and the rotary body 3 needs to be rotated more than a half phase.

The basic principle of the engagement and rotation between the upper cam surface 3a and the lower cam surface 3b of the rotating body 3 and the upper movable cam surface 5a and the lower movable cam surface 6a, and the conversion of the axial movement into the circumferential rotation is also described in detail in chinese patent CN 101460314A. However, unlike this document, in which the intermediate rotating body is axially moved, in the present invention, the upper movable cam surface and the lower movable cam surface are axially moved on both sides of the rotating body.

In the first embodiment described above. The number of the connecting feet 7 is two, and the two connecting feet are respectively positioned at the symmetrical positions outside the rotating body 3. The upper movable cam body 5 is a continuous circular ring, the lower movable cam body 6 is a discontinuous circular ring part, the number of the lower movable cam bodies 6 is two corresponding to the two connecting feet 7, the lower movable cam bodies are respectively fixedly connected with the connecting feet 7, and the width of the lower movable cam bodies is the same as that of the connecting feet 7. In the present invention, the number of the connecting pins 7 is not limited to two, and may be one or more. The engagement of the rotating body 3 with the upper and lower

movable cam bodies

5, 6 is not reliable only when the connecting leg 7 is one. When there are a plurality of connecting legs 7, it becomes difficult to fit the rotating body 3 into the space between the upper and lower

movable cam bodies

5, 6.

The movable gear sleeve reset mechanism can be a reset spring or other reset structures. The movable gear sleeve resetting mechanism can act on the movable gear sleeve 10 or the upper and lower

movable cam bodies

5 and 6, and can also act on a part fixedly connected with or abutted against the movable gear sleeve 10 or the upper and lower

movable cam bodies

5 and 6, such as a holding sleeve 4, but finally needs to act on the movable gear sleeve 10 or the upper and lower

movable cam bodies

5 and 6 and the holding sleeve 4 to enable the movable gear sleeve 10 or the upper and lower

movable cam bodies

5 and 6 and the holding sleeve 4 to be reset towards the upper part.

In the above embodiment, when the movable gear sleeve resetting mechanism acts on the movable gear sleeve 10 first, the movable gear sleeve 10 is used as a driving part to drive the holding sleeve 4 to move during resetting, so that only one corresponding abutting surface of the movable gear sleeve 10 is needed; when the movable gear sleeve resetting mechanism acts on the holding sleeve 4 firstly, the movable gear sleeve 10 is driven by the holding sleeve 4 to move during resetting, two corresponding abutting surfaces of the movable gear sleeve 10 need to be provided, namely, a corresponding groove needs to be provided on the movable gear sleeve 10, and the groove needs to accommodate a lug 41 on the holding sleeve 4 to enter.

In the above embodiment, the projection is disposed on the grip sleeve 4, or the projection may be disposed on the movable gear sleeve 10, and an abutting surface matched with the projection is disposed at a corresponding position of the grip sleeve 4. The arrangement of the projection on the grip sleeve 4 facilitates the assembly of the components.

In the above embodiment, the most preferable scheme of the protrusions 41 on the grip sleeve 4 is that the protrusions 41 are arranged in pairs, and the pairs of protrusions 41 are symmetrically distributed with respect to the axis. In this way, the acting force of the lug 41 on the movable gear sleeve 10 or the upper and lower

movable cam bodies

5 and 6 can be balanced, and the transmission of motion is more facilitated.

The pen holder assembly 1 is provided with an axial slot 11 corresponding to the position of the lug 41, the slot 11 can accommodate the lug 41 to enter or pass through the slot 11, and meanwhile, the slot 11 has a certain axial space which can allow the lug 41 to axially move in the slot 11 within a certain range.

In the invention, the pen core component 2 is linked with the structure form of the rotating body 3 in a circumferential direction in a linkage manner, and the pen core component 2 and the rotating body 3 can be in a fixed connection form; the refill assembly 2 and the rotating body 3 can also be in an axial relative sliding connection mode.

In the above embodiment, the cartridge assembly 2 and the rotary body 3 are in the form of an axial sliding coupling. Under this hookup form, rotator 3 drives refill subassembly 2 in the circumferential direction and rotates and can not receive the influence, and activity facing 10 can drive rotator 3 and remove together when axial displacement, makes relative axial slip between rotator 3 and the refill subassembly 2, therefore the distance that activity facing 10 removed can lengthen to can drive refill sheath 15 and remove longer distance, and then make refill sheath 15 stretch out longer, play better core guard effect to the refill.

In the above embodiment, the lower end of the movable sleeve gear 10 abuts against the cartridge sheath 15. The movable gear sleeve 10 has the function of a transmission part for linkage connection between the holding sleeve 4 and the pen core sheath 15.

The pen core sheath 15 extends into the pen holder assembly 1 to form a sheath seat 151, and meanwhile, in consideration of the problems of assembly, material performance and manufacturing, the sheath seat 151 and the pen core sheath 15 are arranged into two independent parts which are mutually connected into an integral structure through tight fit. The lower end of the movable gear sleeve 10 is abutted against the end face of the sheath seat 151. A compression spring 155 is provided between the sheath holder 151 and the barrel assembly 1, and the compression spring 155 can move the cartridge sheath 15 upward to be reset when the writing pressure to the grip 4 is released.

The above-mentioned compression spring 155 constitutes a cartridge sheath returning mechanism. In the invention, the refill sheath resetting mechanism can also be in other structural forms.

In the above embodiment, the connecting pin 7 is partially or completely sunk into the axial slot 11 of the pen holder assembly 1 in the radial direction.

In this way, the axial slots 11 guide the axial movement of the mobile toothed sleeve 10 and also limit the circumferential rotation of the mobile toothed sleeve 10.

In the above embodiment, in order to enable the connecting pin 7 on the movable tooth sleeve 10 to be installed in the axial slot 11 in the barrel assembly 1, the barrel assembly 1 is divided into the upper and lower parts 1', 1 ″ at the position of the axial slot 11, one part of the upper and lower parts includes all or most of the axial slot 11, and the two parts of the divided barrel assembly are connected through the connecting sleeve 14 and the connecting structure therebetween. In consideration of the installation space and the aesthetic appearance of the use, in this embodiment, the axial slot 11 is entirely included in the lower barrel assembly part 1 ″ while the grip sleeve 4 extends upward to cover the outside of the connection sleeve 14.

In the above embodiment, the decorative cover 12 is arranged outside the barrel assembly 1 and above the grip sleeve 4, and the decorative cover 12 is pushed towards the grip sleeve 4 by the cover spring 13.

Thus, the decorative cover 12 moves synchronously with the axial movement of the grip sleeve 4. When in writing, the holding sleeve is held by fingers, the tiger mouth part is tightly close to the decorative coat, and the two parts move synchronously, so that the hand feels more comfortable when in writing. The structure can also be that the grip sleeve 4 is extended to the upper part of the penholder component 1 without arranging the decorative outer sleeve 12, so that the grip sleeve at least extends to the position which is tightly abutted by the tiger mouth of the hand when writing.

In the invention, a holding sleeve locking mechanism can be arranged, and the holding sleeve locking mechanism can lock and unlock the axial movement of the holding sleeve. Thus, when the grip sleeve is locked, the grip sleeve cannot be axially moved, and the mechanical pencil is used as a general mechanical pencil. This gives the user the opportunity to select and lock the grip when the user does not want to use the automatic lead rotation and protection functions of the mechanical pencil.

The grip sleeve locking mechanism can be as follows: comprises an operating part 81 and a locking block 82, wherein the operating part 81 can control the locking block 82 to enter and move out of the axial slot 11 on the penholder assembly 1.

Fig. 15 shows a grip lock mechanism of a simple structure in which an opening needs to be formed in the grip 4 to expose the manipulation portion 81 outside the grip 4. Of course, a more complicated structure may be provided such that the manipulating portion 81 is not located within the position of the grip sleeve 4, thereby eliminating the need for an opening on the grip sleeve 4.

The grip sleeve locking mechanism can also have other various structural forms, can be locked on the end surface of the grip sleeve, can also be locked in the middle of the grip sleeve, and can also be arranged on the grip sleeve and locked on the penholder assembly.

In the present invention, directional means that the axial direction of the mechanical pencil is toward one end of the cap, and directional means that the axial direction of the mechanical pencil is toward one end of the writing end.

Claims

1. The utility model provides a propelling pencil, includes pen-holder subassembly and sets up the refill subassembly in the pen-holder subassembly, its characterized in that: the pen core assembly is connected with a rotating body in a circumferential linkage manner, a holding sleeve for holding by a hand during writing is arranged outside the pen holder assembly and can axially move in a certain range relative to the pen holder assembly, a driving mechanism is arranged between the holding sleeve and the rotating body and converts the axial reciprocating motion of the holding sleeve into the rotating motion of the rotating body and transmits the rotating motion to the pen core assembly to enable the pen core to rotate, and meanwhile, a pen core sheath is arranged at the front end of the pen holder assembly and has a linkage structure with the holding sleeve; the driving mechanism comprises an upper cam surface and a lower cam surface which are arranged on the upper surface and the lower surface of the rotating body, the positions opposite to the upper cam surface and the lower cam surface are respectively provided with an upper movable cam surface and a lower movable cam surface which correspond to each other, the meshing positions of the upper cam surface and the lower cam surface of the rotating body and the upper movable cam surface and the lower movable cam surface are staggered by less than one phase, the rotating body is arranged between the upper movable cam surface and the lower movable cam surface, the upper movable cam surface and the lower movable cam surface are in linkage connection with the grip sleeve, and the upper movable cam surface and the lower movable cam surface of the rotating body are alternately meshed with each other along with the axial movement of the grip sleeve; the upper movable cam surface is arranged on the upper movable cam body, the lower movable cam surface is arranged on the lower movable cam body, the upper movable cam body and the lower movable cam body are fixedly connected into an integral structure through a connecting pin to form a movable gear sleeve, the rotating body is accommodated between the upper movable cam body and the lower movable cam body and has a certain gap, and the holding sleeve is in linkage connection with the movable gear sleeve; when the upper cam surface contacts with the upper movable cam surface, the lower cam surface and the lower movable cam surface are separated from each other and do not interfere with each other; when the lower cam surface contacts the lower movable cam surface, the upper cam surface and the upper movable cam surface are separated from each other and do not interfere with each other; the engagement surface formed between the upper cam surface and the upper movable cam surface is formed by a plurality of continuous upper fluctuation units in a surrounding mode, and the engagement surface formed between the lower cam surface and the lower movable cam surface is formed by a plurality of continuous lower fluctuation units in a surrounding mode.

2. The mechanical pencil of claim 1, wherein: the lower end of the movable gear sleeve is abutted against the refill sheath, and meanwhile, the refill sheath resetting mechanism is arranged and acts on the refill sheath to enable the refill sheath to move upwards.

3. The mechanical pencil of claim 1, wherein: the movable gear sleeve reset mechanism enables the movable gear sleeve and the holding sleeve to move upwards.

4. The mechanical pencil of claim 1, wherein: one of the upper movable cam body and the lower movable cam body is arranged in a discontinuous split form, and meanwhile, a material with certain elasticity is used for manufacturing the whole movable gear sleeve or the connecting foot part on the movable gear sleeve.

5. The mechanical pencil of claim 4, wherein: the number of the connecting pins is two, and the two connecting pins are respectively positioned at symmetrical positions outside the rotating body.

6. The mechanical pencil of claim 3, wherein: the penholder assembly is provided with an axial slot corresponding to the position of the bump, the slot can accommodate the bump to enter or pass through the slot, and meanwhile, the slot has a certain axial space and can allow the bump to axially move in the slot within a certain range.

7. The mechanical pencil of claim 6, wherein: the connecting pin is partially or completely sunk into the axial groove of the pen holder assembly in the radial direction.

8. The mechanical pencil of claim 1, wherein: a grip sleeve locking mechanism is provided, which can lock and unlock the axial movement of the grip sleeve.

9. The mechanical pencil of claim 6, wherein: the handle sleeve locking mechanism comprises an operating part and a locking block, wherein the operating part can control the locking block to enter and move out of the axial groove on the penholder assembly.

10. The mechanical pencil of claim 1, wherein: the refill assembly and the rotating body are in an axial sliding connection mode.

11. The mechanical pencil of claim 1, wherein: and a decorative outer sleeve is arranged outside the penholder component and above the holding sleeve, and the decorative outer sleeve is pushed to move towards the holding sleeve by an outer sleeve spring.