CN86201863U - Pencil lead sharpener - Google Patents

Abstract

The utility model discloses a pencil lead sharpener which relates to a pencil point sharpener which is capable of sharpening a lead cord of a pencil as long as the pencil does rotary movement relative to a cutting tool. The length of the lead cord exposed to a penholder [9] is controlled by a length measuring device [16] or [17] of the lead cord, and then the point of the lead cord is worn to a point whose width provides different diameter by a cylindrical or circular truncated cone grinding disc [4] whose separation angle of two generating lines is 16 DEG. For example, the width is capable of conforming to the requirement of national standard which defines thick or thin line, or the width is capable of conforming to the requirement of drawing or writing. The utility model is applicable to a propelling pencil and is capable of directly used for a wooden pencil, in particular to a pencil which has high-hardness 6H sharpening.

Description

Pencil lead sharpener

It mainly is that pencil rotates with the sharpener of sharpening lead for retractable pencil with respect to cutting tool that the utility model relates to a kind of, and relates more specifically to a kind of lead for retractable pencil sharpener.

In prior art, generally be to use the steel hobboing cutter lead for retractable pencil of fining away.As commercially available import lead for retractable pencil cutter, promptly with pencil to the steel hobboing cutter lead for retractable pencil of fining away that rotates.This steel hobboing cutter not only cost is extremely expensive, and service life is not long, and particularly when sharpening 6H high rigidity lead for retractable pencil, the steel hobboing cutter very easily weares and teares, and its life-span shortens greatly.Commercially available again lead for retractable pencil cutter only is adapted to propelling pencil, then can't directly be used for the lead for retractable pencil of fining away for the great Wood-bar pencil of sales volume, so that its range of application is narrower.

Even the purpose of this utility model be to provide a kind of material source to be easy to get, to make easy, with low cost and when sharpening 6H high rigidity lead for retractable pencil service life also very long lead for retractable pencil sharpening instrument.When being its sharpening lead for retractable pencil, another purpose of the present utility model can reach the requirement not of uniform size of lead for retractable pencil tip diameter on demand, to be adapted to the different purposes that Graphing of Engineering is drawn thick, the thin figure line of picture or write.Another purpose of the present utility model is by architecture advances, has increased to roll up the scope of application that pen device enlarges the pencil-lead sharpener, make it not only be applicable to propelling pencil, and this rod pencil also can directly be used the purpose that the utility model reaches the sharpening lead for retractable pencil.

The utility model is realized by following design: replace metal hobboing cutter with emery wheel, replace cutting way with grinding process, thereby can be satisfied with the needs that 6H high rigidity lead for retractable pencil is fined away especially, can guarantee the service life of grinding tool, can improve the quality that lead for retractable pencil is fined away again.Control the length that lead for retractable pencil stretches out penholder with a plurality of analyzers,, be adapted to the requirement of drawing thick, the thin figure line of picture or writing to obtain different sharpening degree.And utilize position, space in the base intracavity, below lid, a pencil sharpener device is set, make Wood-bar pencil keep the complete prerequisite last volume of the lead for retractable pencil rod of pruning, and come the sharpening lead for retractable pencil with emery wheel again after exposing the lead for retractable pencil of sufficient length, reach the purpose that enlarges the scope of application of the present utility model.

Effect of the present utility model is tangible.The cost of emery wheel is less than 2 percent of the metal hobboing cutter, emery wheel can be made columniform or truncated cone-shaped easily, and grinding process is adapted to hard material especially, so the utility model is suitable especially to the lead for retractable pencil of grinding high rigidity 6H, the service life of emery wheel is also very long.Simultaneously can grinding obtain tip diameter lead for retractable pencil not of uniform size, especially can get two kinds of specifications that tip diameter is about three and one ratio, it meets the requirement of national standard " mechanical drawing " to thick, thin width of the graphic line ratio; Also needs that can be suitable for writing.When the utility model that adopts the band pencil sharpener, the sharpening that just can be directly applied for the normal wood rod pencil uses.The utility model in use, the lead dust that the wood chip that chips away of volume and grinding are got off all amasss the inside of containing in base, is beneficial to environmental sanitation.

Below in conjunction with accompanying drawing most preferred embodiment of the present utility model is described.

The drawing explanation of accompanying drawing:

Fig. 1 is the structure front view that the utlity model has cylinder emery wheel.

Fig. 2 is the structural representation that the utlity model has the truncated cone-shaped emery wheel.

Fig. 3 is the vertical view of the utility model lid.

Fig. 4 is the left view of the utility model lid.

Fig. 5 is the left view that the utility model has the lid of pencil sharpener.

The structure of embodiment of the present utility model now is described in conjunction with Fig. 1 and Fig. 2: emery wheel ［ 4 ］ tightly is placed on the core ［ 6 ］, the threaded tail end of axle core ［ 6 ］ inserts in the centre bore of base ［ 1 ］, nut ［ 3 ］ is fastened on axle core ［ 6 ］ on the base ［ 1 ］, lid ［ 8 ］ has centre bore to be enclosed within the top of a core ［ 6 ］ and the openend of base ［ 1 ］ is covered, and lid ［ 8 ］ can rotate around axle core ［ 6 ］.Packing ring ［ 5 ］ is placed in a core ［ 6 ］ upward and with emery wheel ［ 4 ］ and lid ［ 8 ］ to be separated, and prevents that lid ［ 8 ］ is subjected to the wearing and tearing of emery wheel ［ 4 ］ when rotated.On the lid ［ 8 ］ a pencil sharpener knife rest ［ 7 ］ and a pen plughole ［ 11 ］ are arranged, pen plughole cap ［ 10 ］ is interconvertible, and its end portion tightly is inserted in the aperture, upper end of pen plughole ［ 11 ］.The two shaft core line of pen plughole cap ［ 10 ］ and pen plughole ［ 11 ］ overlaps, and the endoporus of pen plughole cap ［ 10 ］ is then tightly held the penholder ［ 9 ］ that is inserted.Angle between the central axis of the bus of emery wheel ［ 4 ］ and pen plughole ［ 11 ］ is 8 °, as shown in Figure 1.When the central axis of pen plughole ［ 11 ］ and plumb line tilt 8 ° the time, then emery wheel ［ 4 ］ is cylindrical, if as shown in Figure 2, when the central axis of pen plughole ［ 11 ］ overlapped with plumb line, then to be two angles between bus be 16 ° truncated cone-shaped to emery wheel ［ 4 ］.The emery wheel of truncated cone-shaped and columniform emery wheel manufacturing variation are little, but when adopting the truncated cone-shaped emery wheel, the manufacturing of lid ［ 8 ］ will make things convenient for manyly.As shown in Figure 3 and Figure 4, on lid ［ 8 ］, device for wiping ash ［ 15 ］ is arranged and have lead for retractable pencil dimension measuring instrument ［ 16 ］ and ［ 17 ］ that cross section is a circular groove, the groove length of dimension measuring instrument can be selected different length respectively for use, and their mutual maximum length differences are 1.1～1.5 millimeters.The lead for retractable pencil dimension measuring instrument also can be made into has the groove that cross section is triangle or rectangle.

When using the utility model, only need in the cross-drilled hole ［ 2 ］ on clamping device ［ 14 ］ the insertion base ［ 1 ］, and base ［ 1 ］ is fixed on the corner of desktop or drawing board, perhaps also available one hold base ［ 1 ］, another holds propelling pencil, utilize lead for retractable pencil dimension measuring instrument ［ 16 ］ and ［ 17 ］ to control the length that lead for retractable pencil stretches out penholder, then penholder is gone in the pen plughole ［ 11 ］ with pen plughole cap ［ 10 ］, when shaking penholder ［ 9 ］, pen drives whole lid ［ 8 ］ and rotates around axle core ［ 6 ］, insert while rotating, till the interior shoulder plane ［ 12 ］ by pen plughole ［ 11 ］ props up penholder ［ 9 ］.Because pen rotates with respect to emery wheel ［ 4 ］, emery wheel ［ 4 ］ carries out grinding to lead for retractable pencil fines away lead for retractable pencil.During the lead for retractable pencil grinding, the bottom of pen plughole ［ 11 ］ has a moulding tray ［ 13 ］ to protect lead for retractable pencil, the smooth grinding of protection lead for retractable pencil.The lead for retractable pencil of sharpening can be in device for wiping ash ［ 15 ］ wiping several down, to erase the lead dust that invests the lead for retractable pencil surface.The lead for retractable pencil length of stretching out penholder that the diameter at grinding gained lead for retractable pencil tip is controlled with lead for retractable pencil dimension measuring instrument ［ 16 ］ or ［ 17 ］ is decided.The lead dust that grinding is got off in the utility model use is long-pending to be contained in the inside of base ［ 1 ］, only need extract lid ［ 8 ］, can remove the lead dust in the base ［ 1 ］.

As a kind of conversion of present embodiment, as shown in Figure 5, a pencil sharpener is housed in the below and device for wiping ash ［ 15 ］ corresponding section of lid ［ 8 ］.Pencil sharpener comprises knife rest ［ 7 ］, blade ［ 19 ］ and screw ［ 18 ］, it is the small cylindrical hole ［ 20 ］ that reverse frustoconic hole ［ 21 ］ about 20 ° and length are equivalent to the length that lead for retractable pencil dimension measuring instrument ［ 16 ］ suited for the sharpening lead for retractable pencil that there is the angle between a bus then of linking to each other in the central authorities of knife rest ［ 7 ］, screw ［ 18 ］ is anchored on blade ［ 19 ］ on the knife rest ［ 7 ］, and the bus of sword limit and reverse frustoconic hole ［ 21 ］ is coincided, a tip on sword limit is on the intersection of reverse frustoconic hole ［ 21 ］ and cylindrical hole ［ 20 ］ just.This improvement example makes the utility model can be directly used in the great Wood-bar pencil of sales volume.It is taper seat about 20 ° that pencil sharpener is rolled into angle between a bus with rod, and the lead for retractable pencil that exposes certain-length after peeling off rod is fined away for grinding.The lead dust that wood chip that volume chips away in the use and grinding are got off all amasss the inside of containing in base ［ 1 ］, is beneficial to environmental sanitation.Above-mentioned improvement has enlarged the scope of application of the present utility model.

Claims (8)

1, a kind of pencil cuts cutlery relatively and rotates with the pencil-lead sharpener of sharpening lead for retractable pencil, comprise that having one is equipped with a core base at the center, the rotatable lid in top that is enclosed within a core, device for wiping ash that is contained in lid [8] below and one can be with the securing clamping devices of base, it is characterized in that said cutting cutlery is emery wheel [4], this emery wheel [4] tightly is placed on the core [6], the packing ring [5] that is enclosed within on the core [6] is separated an emery wheel [4] and an above-mentioned rotatable lid in core top [8] that is enclosed within, on the lid [8] pen plughole [11] is arranged, pen plughole cap [10] tightly inserts in the aperture, upper end of pen plughole [11], and a plurality of lead for retractable pencil dimension measuring instruments [16] and [17] are arranged on the described lid [8].

2,, it is characterized in that the below dress of described lid ［ 8 ］ is equipped with a pencil sharpener with device for wiping ash ［ 15 ］ corresponding section by the described pencil-lead sharpener of claim 1.

3, by claim 1 or 2 described pencil-lead sharpeners, it is characterized in that the shape of described emery wheel ［ 4 ］ is cylindrical, perhaps emery wheel ［ 4 ］ is truncated cone-shaped.

4, by claim 1 or 2 described pencil-lead sharpeners, it is characterized in that described pen plughole cap ［ 10 ］ is interconvertible, its end portion tightly is inserted in the aperture, upper end of pen plughole ［ 11 ］, the two shaft core line of pen plughole cap ［ 10 ］ and pen plughole ［ 11 ］ overlaps, and the endoporus of pen plughole cap ［ 10 ］ is tightly held the penholder ［ 9 ］ of insertion.

5, by claim 1 or 2 described pencil-lead sharpeners, it is characterized in that described lead for retractable pencil dimension measuring instrument ［ 16 ］, ［ 17 ］ can be made into and have the groove that cross section is circular arc or triangle or rectangle, the length of groove is selected the length of different size respectively for use.

6, by the described pencil-lead sharpener of claim 5, it is characterized in that described lead for retractable pencil dimension measuring instrument ［ 16 ］, the mutual maximum length difference of ［ 17 ］ groove are 1.1～1.5 millimeters.

7, by the described pencil-lead sharpener of claim 2, it is characterized in that described pencil sharpener comprises knife rest ［ 7 ］, blade ［ 19 ］ and screw ［ 18 ］, it is the small cylindrical hole ［ 20 ］ that reverse frustoconic hole ［ 21 ］ about 20 ° and length are equivalent to lead for retractable pencil dimension measuring instrument ［ 16 ］ length that there is the angle between a bus then of linking to each other in the central authorities of knife rest ［ 7 ］, and screw ［ 18 ］ is anchored on blade ［ 19 ］ on the knife rest ［ 7 ］.

8, by the described pencil-lead sharpener of claim 7, it is characterized in that the sword limit of described blade ［ 19 ］ and the bus of reverse frustoconic hole ［ 21 ］ coincide, a tip on sword limit is on the intersection of reverse frustoconic hole ［ 21 ］ and cylindrical hole ［ 20 ］ just.

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