Slide stop device of a hexagonal spanner

A slide stop device of a hexagonal spanner serves for preventing a rounded edged inner hexagonal screw to slide as the hexagonal spanner drives the inner hexagonal screw. The slide stop device comprises a spanner body; one end of the spanner body having a driving portion. The driving portion has at least one axial slot; a screw hole formed along an axial direction of driving portion; a through hole extending from an inner side of the screw hole and being at the same line with the screw hole; a screwing resisting element capable of being screwed into the screw hole; one end of the screwing resisting element having a driving hole so that an opening can be inserted into the cruciform hole to drive the screwing resisting element to rotate. In use, the screwing resisting element is inserted into the screw hole.

FIELD OF THE INVENTION

The present invention relates to spanners for driving hexagonal screws, and particular to a slide stop device of a hexagonal spanner.

BACKGROUND OF THE INVENTION

In general, if a screw is used for a longer time, the screw will round so that it is difficult to drive the screw by a spanner. Thereby, it is often that the screw must be destroyed for taking the screw out. This will destroy the work piece.

Thereby, to improve the defect in the prior art, there are some ways are developed for resolving the prior art problem.

However, all these improvements are aimed to improve outer hexagonal screws (that is, a screw has a hexagonal driving portion at an outer side of the screw) instead of improving inner hexagonal screws (that is, a screw has a hexagonal driving portion at an inner side of the screw).

This is because, referring toFIG. 7, the conventional spanner for driving an inner hexagonal screw has a solid structure with an L shape which does not deform. Each spanner is designed for screws with predetermined sizes. As the inner hexagonal screw has rounded edges so that as the hexagonal screw is driven, it will slide with respect to the spanner so that it can not be effectively driven.

However, for the outer hexagonal screws, the conventional spanner has expandable claming portions at two ends thereof so that as the edges of the hexagonal portion of an outer hexagonal screw are rounded, the clamping portions can deform to match the round edges of the outer hexagonal screws, but no this mechanism is design for the convention spanner for driving the inner hexagonal screws.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to provide a slide stop device of a hexagonal spanner for preventing a rounded edged inner hexagonal screw to slide as the hexagonal spanner drives the inner hexagonal screw; the slide stop device comprises a spanner body; one end of the spanner body having a driving portion. The driving portion has at least one axial slot; a screw hole formed along an axial direction of driving portion; a through hole extending from an inner side of the screw hole and being at the same line with the screw hole; a screwing resisting element capable of being screwing into the screw hole; one end of the screwing resisting element having a driving hole so that an opening can be inserted into the cruciform hole to drive the screwing resisting element to rotate. In use, the screwing resisting element is inserted into the screw hole.

DETAILED DESCRIPTION OF THE INVENTION

With reference toFIGS. 1 and 2, the slide stop device of a hexagonal spanner of the present invention is illustrated. The slide stop device of a hexagonal spanner includes the following elements.

A spanner body10is enclosed. One end of the spanner body10has a driving portion11. The driving portion11has three axial slots12. Each, slot is extended from a center of one end surface of the driving portion11to apexes or lateral sides of a hexagonal cross section of the driving portion11. A screw hole13is formed along an axial direction of driving portion11. An outer end of the screw hole12in the axial center of the driving portion11has a tapered shape. A through hole14extends from an inner side of the screw hole13and is at the same line with the screw hole13. The through hole14penetrates through a wall of the driving portion11.

A screwing resisting element20has a shape matching the shape of the screw hole13. Thus, a head end21of the screwing resisting element20has a tapered shape. The screwing resisting element20is capable of being screwing into the screw hole13. Another end of the screwing resisting element20has a cruciform driving hole22so that an opening can be inserted into the cruciform hole to drive the screwing resisting element20to rotate. The screwing resisting element20serves for enforcing the driving portion11to deform.

In the hexagonal spanner of the present invention, a screw hole13is formed. By this space, the hexagonal spanner can deform from this portion so as to screw a loosely engaged inner hexagonal screw.

In use, referring toFIGS. 2 and 3, the screwing resisting element20is screwed into the screw hole13with the cruciform hole is at an inner side of the screw hole13. When the spanner body10is placed in an inner side of an inner hexagonal screw30, if initially, the hexagonal screw do not fully resist against the spanner body10due to, for example, the hexagonal screw30has rounded edges. A screw opener is inserted into the through hole14and then into the cruciform hole22for driving the screwing resisting element20to move further into the screw hole13so that the driving portion11can be expanded towards. Thereby, the driving portion11will tightly resist against a wall of the hexagonal screw30. Moreover, in use of the hexagonal spanner, the expansion of the spanner body10can be adjusted as desired even the spanner body10is engaged with the inner hexagonal spanner.

Referring toFIGS. 4 and 5, the second preferred embodiment of the present invention is illustrated. It is illustrated that at another driving end15of the spanner body vertical the driving portion11has three axial slots12′. Each slot is extended from a center of the driving end15to apexes or lateral sides of a hexagonal cross section of the driving end15. A screw hole13′ is formed along an axial direction of driving end15. An outer end of the screw hole12′ in the axial center of the driving end15has a tapered shape. A through hole14′ extends from an inner side of the screw hole13′ and is at the same line with the screw hole13′. The through hole14′ penetrates through a wall of the driving end15.

Referring toFIG. 6, a third preferred embodiment of the present invention is illustrated. It is illustrated that in the driving hole22, the screwing resisting element20may have a cruciform shape, a straight slot shape, a hexagonal shape, or a star shape. Thereby, a screw opening can be inserted into the hole for driving the screwing resisting element20into the screw hole13.