CN215751595U

CN215751595U - Propelling pencil

Info

Publication number: CN215751595U
Application number: CN202121694421.0U
Authority: CN
Inventors: 韩爱国; 郭礼庚
Original assignee: Wenzhou Tianjiao Pen Industrial Co ltd
Current assignee: Wenzhou Tianjiao Pen Industrial Co ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-02-08
Anticipated expiration: 2031-07-23

Abstract

The utility model discloses a mechanical pencil which comprises a clamping jaw used for matching with a lead, wherein an abutting component is arranged in front of the clamping jaw, an abutting part is arranged at the rear end of the abutting component corresponding to the clamping jaw, the abutting part comprises a first through hole for the lead to movably penetrate through, and the abutting part can be inserted into the inner side of the clamping jaw based on the forward movement of the clamping jaw and simultaneously drives the clamping jaw to be opened outwards. The utility model provides a mechanical pencil with better core discharging effect.

Description

Propelling pencil

Technical Field

The utility model relates to a mechanical pencil.

Background

The existing propelling pencil generally comprises a pencil holder, an end cover positioned at the front end of the pencil holder and a tail cover positioned at the rear end of the pencil holder, wherein a core-pulling mechanism is arranged in the pencil holder and comprises a clamping jaw matched and clamped with a lead core and a lantern ring matched and movably sleeved with the clamping jaw. The tail cover is pressed by a hand, the clamping jaw and the lantern ring can be driven to move forwards, the clamping jaw clamps the lead core and conveys the lead core forwards, the lantern ring is limited to stop moving forwards for a certain distance, the lantern ring moves backwards relative to the clamping jaw, and the clamping jaw is reset and opened by means of elasticity of the clamping jaw to release the clamping state of the lead core; when the hand is separated from the tail cover, the clamping jaw and the lantern ring move backwards under the action of the spring to clamp and fix the lead core again so as to facilitate writing. The lead can be driven to extend out of the front end of the penholder by pressing the tail cover through the principle, and the function of automatically discharging the lead is realized.

At present, the existing mechanical pencil has the following defects: for some special lead cores, such as colored lead, the lead core material not only has relatively higher viscosity, but also has a larger diameter, so that the lead core material has a larger contact area with the clamping jaw of the mechanical pencil, and particularly after the clamping jaw and the lead core are contacted and clamped for a long time, the lead core and the clamping jaw are easily adhered together, so that the lead core cannot be normally driven to extend, and the automatic lead-out function is disabled.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the mechanical pencil with better core discharging effect.

In order to achieve the purpose, the utility model provides a mechanical pencil, which comprises a clamping jaw used for matching with a lead, wherein an abutting component is arranged in front of the clamping jaw, an abutting part is arranged at the rear end of the abutting component corresponding to the clamping jaw, the abutting part comprises a first through hole for movably penetrating a lead, and the abutting part can be inserted into the inner side of the clamping jaw based on the forward movement of the clamping jaw.

The abutting part can be made of metal materials and is of a cylindrical structure, the abutting component comprises a base part which is matched and connected with a penholder or an end cover of the pen, the abutting part is matched, connected and fixed with the rear end of the base part, and the base part is made of plastic materials.

Further, the basal portion is including the second through-hole with first through-hole cooperation coaxial coupling, the annular mounting groove that supplies the front end cartridge location of butt portion is seted up to the rear end inboard of second through-hole.

Further, the rear end of the second through hole is provided with a first guiding conical surface.

The abutting component can also comprise a base part which is matched and connected with a pen holder or an end cover of the pen, the abutting part is integrally connected at the rear end of the base part, and the outer side of the abutting part is provided with a second guiding conical surface.

The abutment member may be a separate component which is fixed to the end cap or barrel of the pen by mounting.

The butt component can also be non-independent part, including the end cover that is located the front end of pen, the rear end of end cover has the shrinkage pool, the butt component sets up the axle center position at the shrinkage pool, and the butt component is the tubular structure, and the front end and the end cover body coupling of butt component leave the clearance between butt component and the shrinkage pool lateral wall, a plurality of slots have been seted up along its axle center circumference to the rear end of butt component.

The abutting member may be movable in the front-rear direction of the pen, and a spring may be abutted by a front end of the abutting member.

Furthermore, the limiting component can limit the backward movement of the abutting component and is arranged on a pen holder or an end cover of the pen.

Further, the inner side of the front end of the clamping jaw is provided with a chamfer.

The utility model has the beneficial effects that: when pressing the tail-hood of pen rear end, can drive the clamping jaw and move forward, the clamping jaw is when moving forward, the butt portion of butt component can insert the clamping jaw inboard to order about between its and the lead bonding department separation, thereby make it normally open to the outside, thereby can make the clamping jaw relieve the centre gripping to the lead. Compared with the mode that the clamping jaw is opened by the elasticity of the clamping jaw in the prior art, the automatic pencil lead-out device is not interfered by the adhesion between the pencil lead and the clamping jaw, and the lead-out effect of the automatic pencil can be improved.

Drawings

FIG. 1 is a partial structural view of embodiment 1 of the present invention;

FIG. 2 is a structural view of an abutment member according to embodiment 1 of the present invention;

FIG. 3 is a partial structural view of embodiment 2 of the present invention;

FIG. 4 is a structural view of an abutment member according to embodiment 2 of the present invention;

FIG. 5 is a partial structural view of embodiment 3 of the present invention;

FIG. 6 is a structural view of an end cap of embodiment 3 of the utility model;

FIG. 7 is a partial structural view of embodiment 4 of the present invention;

fig. 8 is a structural view of an abutment member according to embodiment 4 of the present invention.

Detailed Description

As shown in fig. 1-2, embodiment 1 of the mechanical pencil of the present invention includes a pencil holder 11 and an end cap 12 located at the front end of the pencil holder 11, wherein a core discharging mechanism is disposed between the pencil holder 11 and the end cap 12, the core discharging mechanism includes a core discharging tube 21, a clamping jaw 22 clamped in cooperation with a lead core 0, and a collar 23 movably sleeved in cooperation with the clamping jaw 22, the clamping jaw 22 is telescopically disposed at the front end of the core discharging tube 21, the rear end of the end cap 12 includes an insertion portion 122 inserted and positioned inside the pencil holder 11, the rear end of the end cap 12 further has a concave hole 123, the insertion portion 122 is matched with the collar 23 to limit, and the relative movement of the clamping jaw 22 and the collar 23 is utilized to realize the opening of the clamping jaw 22 during forward movement and release the clamping of the lead core 0, and the clamping jaw can re-clamp the lead core 0 during backward movement and fix the lead core 0.

The place ahead of clamping jaw 22 is provided with butt component 3, and butt component 3 sets up the position between the front end of pen-holder 11 and end cover 12 to be located the inboard of pen, butt component 3's the rear end that corresponds with clamping jaw 22 is provided with butt portion 31, butt portion 31 is including the first through-hole 311 that supplies the activity of lead core 0 to wear to establish, butt portion 31 can insert clamping jaw 22 inboard based on the forward motion of clamping jaw 22, makes the bonding department can separate between clamping jaw 22 and the lead core 0, makes clamping jaw 22 can normally open under self elastic action.

The abutting part 31 is made of metal materials and is of a cylindrical structure, and has uniform and thin peripheral side walls 312, the abutting part can be inserted between the lead core 0 and the inner side of the clamping jaw 22 when the clamping jaw 22 moves forwards, the separation of the bonding part between the clamping jaw 22 and the lead core 0 is driven, the clamping jaw 22 can be normally opened under the self elastic action, the abutting part 31 adopts metal materials to ensure that the abutting part can provide higher strength when being matched with the clamping jaw 22, can be thinner, is more beneficial to being inserted into the inner side of the clamping jaw 22, and is not easy to deform and damage, the abutting component 3 comprises a base part 32 which is matched and connected with the end cover 12, the base part 32 is inserted and fixed in the inner side of a concave hole 123 from the rear end of the end cover 12, the side wall of the concave hole 123 is provided with a limiting bulge 121 which can prevent the base part 32 from being separated after being inserted, and the reliability of connection and fixation between the end cover 12 and the end cover 12 can be improved, in other embodiments, the base 32 may be fixedly connected with the barrel 11.

The abutting part 31 is matched, connected and fixed with the rear end of the base part 32, the base part 32 is made of plastic materials, the abutting component 3 is respectively formed by connecting two parts (namely the abutting part 31 and the base part 32) made of different materials, and the whole cost can be saved on the premise of providing higher local strength (namely the abutting part 31). The base portion 32 comprises a second through hole 321 which is matched with the first through hole 311 and is coaxially connected, the second through hole 321 is also used for the lead core 0 to penetrate, an annular mounting groove 3211 for inserting and positioning the front end of the abutting portion 31 is formed in the inner side of the rear end of the second through hole 321, a first guiding conical surface 3212 is formed in the rear end of the second through hole 321, the front end of the abutting portion 31 is conveniently inserted into the annular mounting groove 3211 in a guiding mode, and the front end of the abutting portion 31 and the annular mounting groove 3211 are fixedly inserted in an interference mode to facilitate installation.

The inner side of the front end of the clamping jaw 22 is provided with a chamfer, and the arrangement of the chamfer 221 can lead the abutting part 31 to be inserted into the inner side of the clamping jaw 22, so that the clamping phenomenon is avoided.

Example 2 of the mechanical pencil of the present invention is shown in FIGS. 3-4: including pen-holder 11, be located the end cover 12 of pen-holder 11 front end, be provided with the mechanism of coring between pen-holder 11 and the end cover 12, the mechanism of coring is including the core tube 21 of coring, with the clamping jaw 22 of 0 cooperation centre gripping of lead, with the lantern ring 23 that clamping jaw 22 cooperation activity cup jointed, clamping jaw 22 is flexible to be set up at the front end of coring 21, and the rear end of end cover 12 is including cartridge location in the inboard inserted part 122 of pen-holder 11, the rear end of end cover 12 still has shrinkage pool 123, inserted part 122 with lantern ring 23 cooperation is spacing, utilizes the relative motion of clamping jaw 22 and lantern ring 23 to realize opening when clamping jaw 22 moves forward and remove the centre gripping to lead 0, can grasp again on lead 0 and fix lead 0 when moving backward.

The abutting component 3 comprises a base portion 32 which is matched and connected with the end cover 12 of the pen, the abutting portion 31 and the base portion 32 are integrally formed, the abutting portion 31 is located at the rear end of the base portion 32, the outer side of the abutting portion 31 is provided with a second guiding conical surface 313, the outer diameter of the second guiding conical surface 313 is gradually increased from back to front, the base portion 32 is inserted and fixed on the inner side of the concave hole 123 from the rear end of the end cover 12, the side wall of the concave hole 123 is provided with a limiting protrusion 121 which can prevent the base portion 32 from being separated after being inserted, the reliability of connection and fixation between the end cover 12 and the end cover 12 can be improved, and in other embodiments, the base portion 32 can be matched with the pen holder 11 to be fixedly connected.

In embodiment 2, since the abutting portion 31 and the base portion 32 are integrally formed, the production process can be facilitated and the number of assembling steps between the abutting portion 31 and the base portion 32 can be reduced, and the abutting portion 31 is formed into a tapered structure, so that the strength of the abutting portion 31 in the abutting engagement with the holding jaw 22 can be increased, the abutting portion 31 is not easily deformed or damaged, and the abutting portion 31 can be inserted between the inside of the holding jaw 22 and the lead core 0 in a guided manner, and the component force in the opening direction of the holding jaw 22 can be given by the second guide tapered surface 313 while the abutting engagement with the inside of the holding jaw 22, and the opening effect of the holding jaw 22 can be further increased.

The inner side of the front end of the clamping jaw 22 is provided with a chamfer, and the chamfer 221 can play a role in guiding and inserting the abutting part 31 into the inner side of the clamping jaw 22 and promoting the opening of the clamping jaw 22, so that the clamping phenomenon is avoided, and the using effect is further improved.

Example 3 of the mechanical pencil of the present invention is shown in FIGS. 5 to 6: the core discharging mechanism comprises a core discharging pipe 21, a clamping jaw 22 and a lantern ring 23, wherein the clamping jaw 22 is clamped with a lead core 0 in a matched mode, the lantern ring 23 is movably sleeved with the clamping jaw 22 in a matched mode, the clamping jaw 22 is arranged at the front end of the core discharging pipe 21 in a telescopic mode, the rear end of the end cover 12 comprises an inserting portion 122 which is inserted and positioned on the inner side of the pen holder 11, the inserting portion 122 is matched with the lantern ring 23 to limit, the clamping jaw 22 is opened when moving forwards and released from clamping the lead core 0 through relative movement of the clamping jaw 22 and the lantern ring 23, and the clamping jaw 22 can be clamped on the lead core 0 again when moving backwards and fixes the lead core 0.

The rear end of end cover 12 has the shrinkage pool 123, butt component 3 sets up the axle center position at shrinkage pool 123, and butt component 3 is the tubular structure, and butt component 3's front end and end cover 12 body coupling leave clearance 124 between butt component 3 and the shrinkage pool 123 lateral wall, the outside of butt portion 31 has second guiding cone 313, and the external diameter of second guiding cone 313 gradually increases the setting from back to front, a plurality of slots 33 have been seted up along its axle center circumference to the rear end of butt component 3. The abutting component 3 is directly and integrally formed on the end cover 12, production and processing are convenient, cost can be reduced, the abutting part 31 is arranged to be of a conical structure, the strength of the abutting part 31 in abutting fit with the clamping jaw 22 can be improved, deformation and damage are not prone to occurring, the abutting part 31 can be inserted between the inner side of the clamping jaw 22 and the lead core 0 in a guiding mode, in addition, the component force of the clamping jaw 22 in the opening direction can be given by the aid of the second guiding conical surface 313 of the abutting part when the abutting part is in abutting fit with the inner side of the clamping jaw 22, and the opening effect of the clamping jaw 22 can be further improved.

The setting of slot 33 makes butt component 3 can give the certain elastic clamping effect of the lead 0 of wearing to establish in first through-hole 311, improves the damping of the 0 motion of lead to can reduce rocking of lead 0 when writing, improve the writing effect, clearance 124 can give the space of butt component 3 outside direction deformation, improves its elastic deformation effect. To further enhance such a damping effect, the inner side of the first through hole 311 is provided with a protrusion 3111.

The inner side of the front end of the clamping jaw 22 is provided with a chamfer 221, and the chamfer 221 can play a role in guiding and inserting the abutting part 31 into the inner side of the clamping jaw 22 and promoting the opening of the clamping jaw 22, so that the clamping phenomenon is avoided, and the using effect is further improved.

Example 4 of the mechanical pencil of the present invention is shown in FIGS. 7-8: the core discharging mechanism comprises a core discharging pipe 21, a clamping jaw 22 and a lantern ring 23, wherein the clamping jaw 22 is clamped with a lead core 0 in a matched mode, the lantern ring 23 is movably sleeved with the clamping jaw 22 in a matched mode, the clamping jaw 22 is arranged at the front end of the core discharging pipe 21 in a telescopic mode, the rear end of the end cover 12 comprises an inserting portion 122 which is inserted and positioned on the inner side of the pen holder 11, the inserting portion 122 is matched with the lantern ring 23 to limit, the clamping jaw 22 is opened when moving forwards and released from clamping the lead core 0 through relative movement of the clamping jaw 22 and the lantern ring 23, and the clamping jaw 22 can be clamped on the lead core 0 again when moving backwards and fixes the lead core 0.

The place ahead of clamping jaw 22 is provided with butt component 3, the rear end that corresponds with clamping jaw 22 of butt component 3 is provided with butt portion 31, butt portion 31 is including the first through-hole 311 that supplies the activity of lead core 0 to wear to establish, butt portion 31 can be based on the forward motion of clamping jaw 22 and insert the clamping jaw 22 inboard, makes the bonding department can separate between clamping jaw 22 and the lead core 0, makes clamping jaw 22 can normally open under self elastic action.

The outer side of the abutting part 31 is provided with a second guiding conical surface 313, the outer diameter of the second guiding conical surface 313 is gradually increased from the back to the front, the abutting part 31 is provided with a conical structure, the strength of the abutting part 31 in interference fit with the clamping jaw 22 can be improved, the abutting part 31 is not easy to deform and damage, the abutting part 31 can be guided and inserted between the inner side of the clamping jaw 22 and the lead core 0, in addition, the component force towards the opening direction of the clamping jaw 22 can be given by the second guiding conical surface 313 of the abutting part while the abutting part is in interference fit with the inner side of the clamping jaw 22, and the opening effect of the clamping jaw 22 can be further improved.

The abutting component 3 is arranged at a position between the front end of the pen holder 11 and the end cover 12, is positioned on the inner side of the pen and can move in the front-back direction of the pen, the front end of the abutting component 3 abuts against the spring 4, the front end of the abutting component 3 is provided with a sleeve positioning part 34 for the sleeve positioning of the spring 4, the middle part of the abutting component 3 is provided with an annular flange 35, and the rear end of the spring 4 is sleeved on the sleeve positioning part 34 and abuts against the annular flange 35 at the same time.

The rear end of end cover 12 has the shrinkage pool 123, and the axle center position of shrinkage pool 123 is provided with the section of thick bamboo portion 125 of wearing to establish with the cooperation of lead 0, leaves annular clearance 124 between section of thick bamboo portion 125 and the shrinkage pool 123 lateral wall, the front end cartridge of spring 4 is in the clearance 124, butt component 3 sets up along the axial activity of pen in the shrinkage pool 123, and the annular flange 35 of butt part 3 constitutes sliding fit with the shrinkage pool 123 inner wall. The side wall of the concave hole 123 is provided with a limiting part 126 which can be matched with the annular flange 35 to limit the backward movement of the abutting part 3.

Elastic supporting acting force is provided for the abutting part 3 through the spring 4, the acting force given to the abutting part 3 by the spring 4 is gradually increased when the abutting part is extruded and contracted, so that the abutting part 3 and the clamping jaw 22 are more stably matched, the phenomenon that a sharp feeling is generated when the tail cover at the rear end of the pen is pressed is avoided, the core outlet process is smoother, the hand pressing force is smoother, and the operation comfort level is improved.

Of course, in other embodiments, the abutting member 3 and the spring 4 may be both disposed inside the barrel 11, and the same effect can be achieved.

The above embodiment is only one of the preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.

Claims

1. The mechanical pencil comprises a clamping jaw used for matching with a lead, and is characterized in that: the front of the clamping jaw is provided with an abutting component, the rear end of the abutting component corresponding to the clamping jaw is provided with an abutting part, the abutting part comprises a first through hole for the lead core to movably penetrate through, and the abutting part can be inserted into the inner side of the clamping jaw based on the forward movement of the clamping jaw.

2. The mechanical pencil of claim 1, wherein: the butt joint part is made of metal materials and is of a cylindrical structure, the butt joint component comprises a base part which is matched and connected with a pen holder or an end cover of the pen, the butt joint part is matched, connected and fixed with the rear end of the base part, and the base part is made of plastic materials.

3. The mechanical pencil of claim 2, wherein: the basal portion is including the second through-hole with first through-hole cooperation coaxial coupling, the annular mounting groove that supplies the front end cartridge location of butt portion is seted up to the rear end inboard of second through-hole.

4. The mechanical pencil of claim 3, wherein: the rear end of the second through hole is provided with a first guiding conical surface.

5. The mechanical pencil of claim 1, wherein: the abutting component comprises a base part which is matched and connected with a pen holder or an end cover of the pen, the abutting part is integrally connected with the rear end of the base part, and the outer side of the abutting part is provided with a second guiding conical surface.

6. The mechanical pencil of claim 1, wherein: the abutting component is an independent component and is fixed on an end cover or a penholder of the pen through installation.

7. The mechanical pencil of claim 1, wherein: including the end cover that is located the front end of pen, the rear end of end cover has the shrinkage pool, the butt component sets up in the axle center position of shrinkage pool, and the butt component is the tubular structure, and the front end and the end cover body coupling of butt component leave the clearance between butt component and the shrinkage pool lateral wall, the outside of butt portion has the second direction conical surface.

8. The mechanical pencil of claim 1, wherein: the abutting component can move along the front-back direction of the pen, and the front end of the abutting component abuts against the spring.

9. The mechanical pencil of claim 8, wherein: the limiting part is arranged on a pen holder or an end cover of the pen.

10. The mechanical pencil according to any one of claims 1 to 9, wherein: and a chamfer is arranged on the inner side of the front end of the clamping jaw.