CN201471922U

CN201471922U - Novel writing pen cap for chalks

Info

Publication number: CN201471922U
Application number: CN2009201916128U
Authority: CN
Inventors: 严承翔
Original assignee: YAN CHENGXI ANG; YAN CHENGXI'ANG
Current assignee: YAN CHENGXI ANG; YAN CHENGXI'ANG
Priority date: 2009-08-11
Filing date: 2009-08-11
Publication date: 2010-05-19
Anticipated expiration: 2019-08-11

Abstract

The utility model relates to a novel writing pen cap for chalks, belonging to the technical field of teaching tools. The pen cap comprises a tubular chalk cap. The utility model is characterized in that one end of the chalk cap is a taper pipe, and a plurality of tensioning holes are arranged in the axial direction of the taper pipe; the other end of the chalk cap is connected with a propeller, the propeller comprises an outer cap, and a telescopic rod is arranged in the outer cap; a thread rod penetrates through the center of the telescopic rod, and fits with the telescopic rod by threads; a guide groove is arranged in the outer cap, and a slide rail is axially arranged on the outer diameter of the outer cap. When the thread rod is rotated, the telescopic rod makes linear motion, and pushes out chalks. The elastic tensioning holes are suitable for clamping chalks. The utility model has the advantages of safety, reliability and convenient use.

Description

Novel chalk is write the pen cap

Technical field

The utility model relates to the teaching aid technical field, especially relates to a kind of novel chalk and writes the pen cap.

Background technology

Chalk in use, often owing to undue force fractures, incessantly can influence writing quality or waste when writing grasping more in short-term, no matter be white chalk or crayon, directly cause the chalk dust that bonds on hand with grasped, at this moment no matter turn over book or do other thing as all adhering to other place by water tumbler temporarily, long hand of time also is difficult to cleaning, and it is unfavorable that Writer's health is had.Therefore people have thought the chalk sleeve of many these defectives of reply.

As Chinese patent application number is 200410061252.1 1 kinds of chalk sleeves, an if sleeve, feature is that the chalk inlet of chalk sleeve has a umbrella shape flanging, flanging is to the stack shell direction folding of sleeve, flanging is a ring-type, its interior ring is the sleeve inlet, its outer shroud is outside sleeve, on the inwall of sleeve, there is a chalk pullover, the outer wall circular diameter that chalk is pullover and the inwall circular diameter of sleeve equate, on chalk is pullover, be fixed with the outer wall circular diameter of long-armed, long-armed length, can isolate finger and chalk greater than sleeve.As Chinese patent application number is 200610028126.5 1 kinds of chalk sleeves, comprise housing body, push rod, clamp mechanism, housing body is the hollow structure that inside has projection, its front end is a clamp mechanism, in housing body and clamp mechanism junction external screw thread is arranged, push rod inserts from the rear end of housing, the front end of push rod has fixture block, match with the projection of housing and to play the effect of location, clamp mechanism is positioned at the front end of housing body, comprise the sliding sleeve of jaw and tool internal thread, jaw is made of the intermediate plate of 3 pyramidal structures, and the sliding sleeve internal thread can be meshed with the external screw thread of an annulus of pen cap front end.Be that ZL200820006812.7 chalk user uses chalk for a long time and chalk sleeve that hand can keep clean as the patent No., the agent structure of chalk sleeve is the cylinder type sleeve of two open ends, sleeve diameter is greater than the chalk butt diameter, chalk sleeve in the raw the time chalk can easily pass chalk sleeve, inside and outside of sleeve all has anti-skid structure.These several structures are different with structure of the present invention.

And for example Chinese patent application number is 200710093902.4 to disclose a kind of chalk sleeve, it is characterized in that, comprise inner core and urceolus, urceolus is enclosed within outside the inner core, inner core and urceolus are threaded, and inner core is provided with the cavity that can hold chalk, and chalk is contained on the inner core, can adjust the length that chalk exposes by rotation, the inner core of this structure and urceolus are threaded and are bondd by chalk dust easily and rotate dumb.

Chinese patent application number is 200610019224.2 elevating type chalk casing for another example, is characterised in that its sleeve lining is provided with screw thread, is with a small casing, and the small casing outer wall is provided with screw thread, it and sleeve lining threaded engagement.The chalk that this structure is packed into is loosening easily, causes the shakiness that holds a pen; And the patent No. is a kind of chalk sleeve of utility model of ZL200720084484.8, is to be made of push rod, the pen cap, spring, baffle plate, thin bar, chalk, plastic clip, and push rod is installed in the tail position of the pen cap.It also is a kind of chalk sleeve of ZL200720015100.7 just like the patent No., be provided with slot at outer casing inner wall, be provided with pen container in the overcoat, pen container surface wall both sides are corresponding with the outer casing inner wall slot, the sleeve surface wall offers rectangular longitudinally, and boost motor is connected with pen container by rectangular.These pens cap cut both ways, and structure and structure of the present invention are all different.

Summary of the invention

The purpose of this utility model is in order to solve the chalk problem of frangibility, easily waste, the easily sticking hand of powder ash in use, a kind of reasonable in design is provided, and chalk length is regulated arbitrarily, even make moist also not frangibility, few waste, finger does not directly contact the novel chalk of chalk and writes the pen cap.

Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of novel chalk is write the pen cap, comprise a tubular chalk sleeve, an end that it is characterized in that described chalk sleeve is a cone tube, cone tube be axially arranged with some tensioning mouths, the other end of chalk sleeve connects a propeller; Described propeller comprises an overcoat, and expansion link is housed in the overcoat, a threaded rod pass the expansion link center and with the expansion link threaded engagement, be provided with gathering sill in the overcoat, the expansion link external diameter is axially arranged with slide rail.When the rotation threaded rod, the expansion link moving linearly, and eject chalk, rubber-like tensioning mouth appropriateness clamps chalk, and is safe and reliable, easy to use.

As preferably, an end of described threaded rod is equipped with knob, and the length of threaded rod in overcoat is no more than the end that overcoat is connected with chalk sleeve.The diameter of knob equals the diameter of overcoat, the length of threaded rod is to guarantee that the promotion expansion link ejects chalk fully and is as the criterion, at this moment establish a positive stop lug boss at expansion link towards an end of knob, corresponding with the limited block that an end endoporus that overcoat is connected with chalk sleeve is provided with, prevent that expansion link from promoting chalk and breaking away from threaded rod when not holding.

As preferably, the straight tube end of described chalk sleeve is provided with connecting thread, is connected with sleeve thread in the propeller.It generally is the sheathed external screw thread of chalk, put outward and establish internal thread, so not only be beneficial to and hold, and promote in the chalk process at expansion link, can not stop the expansion link motion, and the withdrawal expansion link is easy to operate when changing chalk because of the step that the diameter difference between chalk sleeve and the overcoat produces.

As preferably, described length of telescopic bar is less than the length of overcoat, the internal diameter matched in clearance of the external diameter of expansion link and overcoat, the gathering sill matched in clearance in slide rail on the expansion link and the overcoat.The length of expansion link with depend on standard chalk and length, the same with threaded rod, flexible effect is that chalk is released chalk sleeve fully.

As preferably, the gathering sill that is provided with in the described overcoat is one or some, and the slide rail that the expansion link external diameter is axially arranged with is one or some accordingly.Generally establish one or two as the guiding slide rail of usefulness and gathering sill on circumference and get final product, processing cost is relatively low like this, can establish equally distributed many certainly.

As preferably, the inner nut length that described expansion link cooperates with threaded rod is a standard nut length, and the end that expansion link promotes chalk is equipped with jacking block.The length of nut can not be oversize, so not only increase difficulty of processing, and the friction when increasing rotation, be provided with through hole in the middle of the jacking block, use the guide effect of initially playing the double thread bar at chalk, can increase simultaneously contact area, the hollow pipe manufacture craft of expansion link is oversimplified chalk.

As preferably, tensioning mouth one end suit one cap of described chalk sleeve, the described cap blind hole in axially is a bellmouth.Cap makes entire product more perfect, and the degree of depth of bellmouth will be considered in the use of chalk head and expose a bit of of chalk sleeve.

As preferably, described chalk sleeve adopts rubber-like metal material or plastics to make.As stainless steel, plastic cement etc., flexible energy clamps but can not produce too big resistance, if adopt the steel material to make chalk sleeve, then also can establish a rubber-like flexible material in addition and make a little cover of being with the tensioning mouth.

Therefore, the utility model is a kind of reasonable in design, and the assembling chalk is easy, regulates freely, and the novel chalk of safety and sanitation is write the pen cap.

Description of drawings

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is the A-A sectional structure schematic diagram of the utility model Fig. 1.

Fig. 3 is the 2 one kinds of expansion link structural representations of part among the utility model Fig. 1.

Fig. 4 is a kind of chalk sleeve structural representation of part 3 among the utility model Fig. 1.

Fig. 5 is a kind of cap structural representation of the present utility model.

Among the figure: 1. knob; 2. expansion link, 21. slide rails, 22. inner nuts, 3. chalk sleeve, 31. connecting threads, 32. tensioning mouths, 33. cone tubes, 4. chalk, 5. overcoat, 51. gathering sills, 6. nib lid, 61. blind holes, 7. jacking block, 8. threaded rod.

The specific embodiment

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Referring to Fig. 1, Fig. 4, present embodiment is made a tubular chalk sleeve 3 according to the chalk size of standard with plastic material, can adorn chalk 4 in the pipe, one end of chalk sleeve 3 is provided with interior connecting thread 31, and the other end is made cone tube 33, establishes the tensioning mouth 32 of four wide 0.8mm, long 15mm on the cone tube 33.

Straight tube end at chalk sleeve 3 connects a propeller, propeller is established a tubular overcoat 5, adorn an expansion link 2 in the overcoat 5, overcoat 5 and expansion link 2 matched in clearance, as Fig. 2, shown in Figure 3, overcoat 5 endoporus are provided with two gathering sills 51, and expansion link 2 outside journal axles are to establishing two slide rails 21 with gathering sill 51 matched in clearance.

Expansion link 2 is also made of pipe profile, and an end is established an inner nut 22, and inner nut 22 matches with the screw thread of threaded rod 8, the other end of expansion link 2 is adorned a circular jacking block 7, the diameter of jacking block 7 is less than the external diameter of expansion link 8, and jacking block 7 central axis direction are through hole, this through hole and threaded rod 8 matched in clearance.

The length of threaded rod 8 in the overcoat 5 of packing into after, be no more than the end that overcoat 5 is connected with chalk sleeve 3, the knob 1 of the equal diameters of an external diameter and overcoat 5 is adorned in an end of threaded rod 8, knob 1 interfixes with threaded rod 8.

As shown in Figure 6, be provided with tensioning mouth 32 1 end suits one cap 6 at chalk sleeve 3, cap 6 is axially arranged with blind hole 61, the little interference fit of external diameter of the diameter of blind hole 61 and chalk sleeve 3.

During use, earlier propeller and chalk sleeve 3 are outwarded winding, chalk 4 is put in the chalk sleeve 3, utilize threaded rod 8 that expansion link 2 is adjusted to initial position this moment, again overcoat in the propeller 5 and chalk sleeve 3 is contained in one, opens cap 6, turn knob 1, expansion link 2 is the rectilinear motion orientation with guide rail 21, gathering sill 51 under the promotion of threaded rod 8, makes expansion link 2 eject chalk sleeve 3 to chalk 4.

When chalk 4 use shorter and shorter the time, the diameter that its chalk is 4 is increasing, in this process, four tensioning mouths 32 that chalk sleeve 3 ends are provided with play tension, remain chalk and are in a kind of steady status, are beneficial to and write.

The foregoing description is to explanation of the present utility model, is not to qualification of the present utility model, any structure after the simple transformation of the present utility model is all belonged to protection domain of the present utility model.

Claims

1. a novel chalk is write the pen cap, comprise a tubular chalk sleeve (3), an end that it is characterized in that described chalk sleeve (3) is cone tube (33), cone tube (33) be axially arranged with some tensioning mouths (32), the other end of chalk sleeve (3) connects a propeller; Described propeller comprises an overcoat (5), expansion link (2) is housed in the overcoat (5), one threaded rod (8) pass expansion link (2) center and with expansion link (2) threaded engagement, be provided with gathering sill (51) in the overcoat (5), expansion link (2) external diameter is axially arranged with slide rail (21).

2. novel chalk according to claim 1 is write the pen cap, it is characterized in that an end of described threaded rod (8) is equipped with knob (1), and the length of threaded rod (8) in overcoat (5) is no more than the end that overcoat (5) is connected with chalk sleeve (3).

3. novel chalk according to claim 1 is write the pen cap, it is characterized in that the straight tube end of described chalk sleeve (3) is provided with connecting thread (31), is threaded with overcoat (5) in the propeller.

4. novel chalk according to claim 1 is write the pen cap, it is characterized in that the length of described expansion link (2) length less than overcoat (5), the internal diameter matched in clearance of the external diameter of expansion link (2) and overcoat (5), slide rail (21) on the expansion link (2) and interior gathering sill (51) matched in clearance of overcoat (5).

5. novel chalk according to claim 1 is write the pen cap, it is characterized in that the gathering sill (51) that is provided with in the described overcoat (5) is one or some, and the slide rail (21) that expansion link (2) external diameter is axially arranged with is one or some accordingly.

6. novel chalk according to claim 1 is write the pen cap, it is characterized in that inner nut (22) length that described expansion link (2) cooperates with threaded rod (8) is a standard nut length, and the end that expansion link (2) promotes chalk is equipped with jacking block (7).

7. novel chalk according to claim 1 is write the pen cap, it is characterized in that tensioning mouth (32) the one end suits one nib lid (6) of described chalk sleeve (3), is provided with blind hole (61) in nib lid (6) is axial.

8. novel chalk according to claim 1 is write the pen cap, it is characterized in that described chalk sleeve (3) adopts rubber-like metal material or plastics to make.