CN2260717Y - Lead core capable of drawing three-fixed-width line and propelling pencil thereof - Google Patents

Abstract

The utility model provides a lead core capable of drawing three kinds of fixed line widths and an automatic pencil thereof. It includes a triangular prism-shaped lead core, an inner core and a pen holder, and is characterized in that: the cross-section of the triangular prism-shaped lead core is a triangle with different side lengths, and the upper end of the inner wall of the pen holder is respectively provided with a three-jaw chuck to ensure that the inner core The clamped triangular lead is an orientation projection and an orientation guide groove corresponding to the triangular prism shape of the lead outlet at the lower end of the pen holder. When in use, the lengths of the three bottom edges of the triangular prism-shaped lead core are not equal, and one bottom edge can be selected according to the line width to be drawn, and three kinds of lines with the same width as each edge can be drawn.

Description

Ability to draw three types of lead with fixed line width and its automatic pencil

The utility model relates to an improved lead core and an automatic pencil thereof, in particular to a lead core capable of drawing three kinds of fixed line widths and an automatic pencil thereof. Suitable for drawing, standardized test painting answer selection box.

Chinese Patent No. 9320310.9 "Pencil for Examination" provides a pencil for filling the answer selection box of the standardized test paper. Sectional pencil. Chinese Patent No. 92229750.9 "Pencil lead with rectangular cross-section and mechanical pencil with rectangular lead", which provides a pencil lead with a rectangular cross-section and a mechanical pencil with a rectangular lead. It consists of an inner core and a penholder. The inner core is made of lead Core, four-jaw chuck jacket, four-jaw chuck, spring outer sleeve, spring, spring inner sleeve, pen lead storage tube, lead input button, etc. After the inner core is installed, put it into the pen holder, press the nib outlet and the pen clip to form a mechanical pencil. Although the pencils provided by the above two patents bring convenience to drawing, they only provide two standard line widths.

The task of the utility model is to provide a lead lead capable of drawing three kinds of fixed line widths and an automatic pencil thereof.

The task of the present utility model is finished in the following way, this can draw the lead lead of three kinds of fixed line widths and automatic pencil thereof, it comprises the lead lead of triangular prism shape, the inner core of the chuck that band can clamp lead lead and The lower end of the pen barrel has a lead outlet, and the upper end of the pen barrel has a pen barrel gland that presses the inner core into the pen barrel. It is characterized in that: the cross section of the triangular prism-shaped lead is a triangle with different side lengths; the lead outlet at the lower end of the pen barrel The inner wall is a triangular prism slightly larger than the triangular prism-shaped lead core; the chuck of the inner core is a three-jaw chuck that can clamp the triangular prism lead core and corresponds to the triangle of the cross-section of the triangular prism-shaped lead core; The upper end of the outer wall and the upper end of the inner wall of the pen holder respectively have orientation projections and orientation guide grooves to ensure that the triangular lead core clamped by the three-jaw chuck of the inner core corresponds to the triangular prism shape of the lead outlet at the lower end of the pen holder.

When in use, the lengths of the three bottom edges of the triangular prism-shaped lead core are not equal, and one bottom edge can be selected according to the line width to be drawn, and three kinds of lines with the same width as each edge can be drawn.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the longitudinal sectional schematic view of the lead core and the mechanical pencil capable of drawing three kinds of fixed line widths provided by the utility model.

Fig. 2 is an enlarged view of the section A-A of Fig. 1 .

In the accompanying drawings, 1, lead core outlet, 2, clamp head, 3, clamp head hoop, 4, sliding sleeve, 5, spring, 6, pen holder, 7, triangular prism-shaped lead core, 8, inner core, 9, Penholder gland, 10, eraser, 11, input lead button, 12, directional guide groove, 13, directional projection.

This kind of lead lead and its mechanical pencil capable of drawing three kinds of fixed line widths include a triangular prism-shaped lead lead 7, an inner core 8 with a chuck 2 capable of clamping the lead lead, and a pen holder 6 with a lead lead outlet 1 at the lower end, The upper end of the penholder 6 has a penholder gland 9 that presses the inner core 8 in the penholder 6. The cross section of the triangular prism-shaped lead core 7 is a triangle with different side lengths, and the inner wall of the lead outlet at the lower end of the penholder is slightly larger than the triangular prism. The triangular prism shape of the lead core 7; the chuck 2 of the inner core 8 is a three-jaw chuck corresponding to the cross-sectional triangle of the triangular prism lead core 7 that can clamp the triangular prism lead core 7; the inner core 8 The upper end of the outer wall and the upper end of the inner wall of the pen holder 6 respectively have orientation bumps 13 and orientation guides that ensure that the triangular prism-shaped lead 7 clamped by the three-jaw chuck of the inner core 8 corresponds to the triangular prism shape of the lead outlet 1 at the lower end of the pen holder 6 . Slot 12. When in use, the lengths of the three bottom edges of the triangular prism-shaped lead core are not equal, and one bottom edge can be selected according to the line width to be drawn, and three kinds of lines with fixed width can be drawn. When the mechanical pencil is installed to adjust the triangular prism-shaped lead core 7, the lead core input button 11 can be pressed, the inner core 8 is pushed, the clamp head 2 is pushed forward, and the steps on the inner wall of the pen holder 6 prevent the sliding sleeve 4 and the clamp head hoop from 3 directions. Before that, release the three claws of the chuck 2, align the triangular prism-shaped lead core 7 according to the different edge lengths and put them into the chuck 2 of the inner core 8 through the lead core outlet 1, or adjust the position of the lead core to release it. The pressed lead core button 11, due to the effect of the spring 5, makes the inner core 8 retreat, and the sliding sleeve 4 and the clamp hoop 3 re-press the clamp 2, so that the triangular prism-shaped lead core 7 is fixed and stuck on the clamp superior. You can also unscrew the penholder gland 9 to take out the inner core 8 and its accessories 2, 3, 4, 5, 7, 10, 11 from the penholder 6, and push the clamp headband 3 and the sliding sleeve 4 back with your hands to make the clamp Stretch out the head 2 and relax it, put the triangular prism-shaped lead core 7 into the position of the corresponding three claws of the chuck 2, when the hand is released, the spring 5 acts to make it clamp automatically, and align the orientation bump 13 with the orientation guide After the groove 12, the inner core 8 and its accessories 2, 3, 4, 5, 7, 10, 11 are put into the penholder 6 together, and then the penholder gland 9 is screwed on.

Claims (2)

1. A lead core capable of drawing three kinds of fixed line widths, which is a triangular prism-shaped lead core, is characterized in that: the cross-section of the triangular prism-shaped lead core is a triangle with unequal side lengths. 2. A mechanical pencil capable of drawing three fixed line widths, which includes a triangular prism-shaped lead [7], an inner core [8] with a chuck [2] capable of clamping the lead, and a lead outlet at the lower end [ 1] the penholder [6], the upper end of the penholder [6] has a penholder gland [9] that presses the inner core [8] into the penholder [6], and is characterized in that: the cross section of the triangular prism-shaped lead core [7] It is a triangle with side lengths unequal, and the inner wall of the lead outlet [1] at the lower end of the pen holder [6] is a triangular prism slightly larger than the triangular prism-shaped lead [7], and the chuck of the inner core [8] is capable of clamping The three-jaw chuck corresponding to the cross-section triangle of the triangular prism lead [7] of the triangular prism lead [7], the outer wall upper end of the inner core [8] and the inner wall upper end of the pen holder [6] are respectively guaranteed to make the inner core The triangular prism-shaped lead core [7] clamped by the three-jaw chuck of [8] corresponds to the triangular prism-shaped orientation projection [13] and orientation guide groove [12] of the lead core outlet [1] at the lower end of the penholder [6] ].

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