CN101376240A

CN101376240A - Screwdriver

Info

Publication number: CN101376240A
Application number: CNA200710094052XA
Authority: CN
Inventors: 马剋; 劳伦斯; 埃利斯; 文森特
Original assignee: Logistics (shanghai) Co Ltd
Current assignee: Logistics (shanghai) Co Ltd
Priority date: 2007-08-31
Filing date: 2007-08-31
Publication date: 2009-03-04

Abstract

The invention discloses a screwdriver which comprises a screwdriver bar and a handle. The handle comprises an inner layer of handle, an intermediate layer of handle and an outer layer of handle, wherein the inner layer of handle is made of a first solid organic material and tightly wrapped on the screwdriver; the intermediate layer is made of a second organic material and tightly wrapped on the inner layer of handle; the texture of the second solid organic material is softer than the first solid organic material; the outer layer of handle is made of a third solid organic material and tightly wrapped on the intermediate layer of handle; and the texture of the third solid organic material is softer than the second solid organic material. The invention has a simple structure. when a user uses the screwdriver, the handle of the screwdriver is matched with the shape of a hand the user, so that the torque applied by the hand of the user is effectively passed to the screwdriver bar, thereby reducing the discomfort of the hand part of the user when the force is applied, enabling the user to apply force easily and ensuring the comfortable feeling of the hand part.

Description

Screwdriver

Technical field

The present invention relates to a kind of instrument, especially a kind of screwdriver.

Background technology

As a kind of instrument very commonly used, screwdriver is seen everywhere in people's life, and it is that indispensable instrument is produced in family life and work.Existing screwdriver often all is that the screwdriver rod with screwdriver simply is connected with a handle, though structure is very simple like this, but can have some problems in operation.Because people's hand can be perspired,, make the user to exert oneself fully so may cause hand when holding the handle of screwdriver, to slide between hand and the handle.Through observational study, find that this is because the handle of most existing screwdriver is not the shape that meets very much staff, thereby cause the generation of above-mentioned situation.In order to address this problem, there has been the people that the shape of the handle of screwdriver is improved, for example increase the depression that some hold finger, to meet the shape of staff.But because the shape and the size of people's hand all can be variant, therefore only for the improvement of profile, can't adapt to all users, it is pleasant to cause some to use, and the others uses, can still not meet the shape of its hand because of the profile of screw driver handle, and still sensation is required great effort.

Summary of the invention

Technical problem to be solved by this invention provides a kind of screwdriver, can adopt comparatively simple structure, make and prevent from use to slide between handle and the hand, make the transmission of moment of torsion more effective, and can alleviate screwdriver adversary's reaction force, the sense of discomfort that minimizing produces because of the reaction force adversary is even the variform user of hand also can exert oneself easilier.

For solving the problems of the technologies described above, technical scheme of the present invention is, comprises screwdriver rod and handle, and described handle comprises

The internal layer handle is made by first solid organic material, and it tightly is wrapped in the lower end of described screwdriver rod, can relative slip not take place with described screwdriver rod after being applied in moment of torsion;

The middle level handle, make by second solid organic material, it tightly is wrapped in outside the described internal layer handle from the side, after being applied in moment of torsion can relative slip not take place with described internal layer handle, described second solid organic material is softer than the quality of described first solid organic material, and described middle level handle outer surface is provided with the longitudinal strip projection;

Outer handle, make by the 3rd solid organic material, it tightly is wrapped in outside the handle of described middle level from the side, after being applied in moment of torsion can relative slip not take place with described middle level handle, described the 3rd solid organic material is softer than the quality of described second solid organic material, described outer handle is provided with the longitudinal strip hollow out, and the longitudinal strip projection of described longitudinal strip hollow out and described middle level handle is nested.

The present invention adopts three kinds of materials that hardness is different by the handle that makes screwdriver, its structure is comparatively simple, and when the user uses, can fit the more shape of user's hand of the handle of screwdriver, the moment of torsion that makes the user apply on hand more effectively is delivered on the screwdriver rod, and alleviated of compressing and the injury of the reaction force of screwdriver greatly to user's hand, reduced user's issuable sense of discomfort of hand firmly the time, made that the user is more prone to exert oneself and hand feels comfortable.

Description of drawings

The present invention is further detailed explanation below in conjunction with drawings and Examples:

Fig. 1 is the structural representation of screwdriver of the present invention;

Fig. 2 is the vertical view of screwdriver of the present invention;

Fig. 3 is an A-A cutaway view among Fig. 2;

Fig. 4 is a B-B cutaway view among Fig. 2.

Reference numeral is among the figure, 1. screwdriver rod; 2. handle; 3. internal layer handle; 4. middle level handle; 5. outer handle; 6. the expose portion of internal layer handle end; 7. cave in; 8. longitudinal strip projection; 9. small depressions or protrusions; 10. through hole.

The specific embodiment

The structure of screwdriver of the present invention can comprise screwdriver rod 1 and handle 2 referring to Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, and described handle 2 comprises:

Internal layer handle 3 is made by first solid organic material, and it tightly is wrapped in the lower end of described screwdriver rod 1, can relative slip not take place with described screwdriver rod 1 after being applied in moment of torsion;

Middle level handle 4, make by second solid organic material, it tightly is wrapped in outside the described internal layer handle 3 from the side, after being applied in moment of torsion can relative slip not take place with described internal layer handle 3, described second solid organic material is softer than the quality of described first solid organic material, and described middle level handle 4 outer surfaces are provided with longitudinal strip projection 8;

Outer handle 5, make by the 3rd solid organic material, it tightly is wrapped in outside the described middle level handle 4 from the side, after being applied in moment of torsion can relative slip not take place with described middle level handle 4, described the 3rd solid organic material is softer than the quality of described second solid organic material, described outer handle 5 is provided with the longitudinal strip hollow out, and the longitudinal strip projection 8 of described longitudinal strip hollow out and described middle level handle 4 is nested.

Like this, after the user holds screw driver handle, because the material hardness of handle 2 is from inside to outside more and more softer, therefore can be so that the handle of screwdriver can be with the shape generation deformation of user's hand, make the handle of screwdriver more meet the shape of user's hand, thereby the user is more prone to firmly.In addition, because it is described relatively softer than the material in the outside, therefore in use, material than the outside can fit in inboard material more relatively, make and relative slip can not take place between the different materials, like this, on the screwdriver rod that is delivered to screwdriver that the torsion that the user applied just can lose not, make that the transmission of moment of torsion is more effective, but also can alleviate of compressing and the injury of the reaction force of screwdriver to user's hand, reduce user's issuable sense of discomfort of hand firmly the time, allow the user feel more laborsaving and comfortable in use.

The rough surface of described internal layer handle 3, middle level handle 4 and outer handle 5.Can increase described internal layer handle 3, middle level handle 4, outer handle 5 so each other and the frictional force between handle and the hand, further prevent the generation of sliding relatively.

Described handle is middle thin, and two is pluckings; Top is short, following minister's pin shape.This shape meets the shape of staff when gripping object more, makes the user be more prone to firmly.

As shown in Figure 2, the outline in described handle cross section is a regular polygon, and the length of side of this regular polygon is corresponding with the average distance between the staff finger-joint, and the longitudinal strip projection 8 of described middle level handle is arranged on the rib of described handle 2.People's finger connects phalanges by the joint and forms, and therefore when gripping object, the inboard of hand is not to form a circular arc, but forms polygonal some limits.When the user used screwdriver of the present invention, described longitudinal strip projection 8 was positioned at the joint of the hand of gripping handle, made the shape of handle and hand fit more.

The top of described handle 2 or be provided with a plurality of depressions 7 near the position of front end, described a plurality of depressions 7 are between the axis of described adjacent two longitudinal strip projections 8.Use when of the present invention the user, this depression 7 can be held thumb and the forefinger that grips hand, to make things convenient for the user firmly.

The outer surface of described outer handle is provided with many small depressions or projection 9.This small depression or projection 9 can further increase the friction between hand and the handle, prevent that hand from handle relative slip taking place.

The end 6 of described internal layer handle is exposed to outside described middle level handle 4 and the described outer handle 5.。Sometimes, screwdriver can be used as chisel, at this moment just need knock screwdriver with hammer.Be positioned at outermost outer handle 5 if directly knock, because its quality softness, therefore the energy that knocks all is absorbed, and can't effectively reach the effect of knocking.The end 6 of described internal layer handle is exposed to described middle level handle 4 to be become outside the handle 5 outward with described, when knocking, because the expose portion 6 of internal layer handle end directly contacts with described screwdriver rod 1, and described internal layer handle 1 quality is hard, therefore the energy that knocks can all be delivered on the screwdriver rod 1, thereby has increased the function of screwdriver.

The bottom of described handle 2 is provided with a through hole 10, and the axis of described through hole 10 and the axis of screwdriver are in same plane and vertical mutually.When using screwdriver of the present invention to twist some very difficult screws of twisting, can be with a hard bar-shaped object, steel bar for example, pass described through hole 10, owing to increased the length of the arm of force, therefore the moment in the time of can increasing the screwdriver the turn of the screw greatly is even some very tight screws also can very easily screw down after increasing moment.

In sum, the present invention adopts three kinds of materials that hardness is different by the handle that makes screwdriver, its structure is comparatively simple, and when the user uses, can fit the more shape of user's hand of the handle of screwdriver, the moment of torsion that makes the user apply on hand more effectively is delivered on the screwdriver rod, and alleviated of compressing and the injury of the reaction force of screwdriver greatly to user's hand, reduce user's issuable sense of discomfort of hand firmly the time, made user's be more prone in use exert oneself (promptly feeling more laborsaving) and hand feel comfortable.

Claims

1. a screwdriver comprises screwdriver rod and handle, it is characterized in that, described handle comprises

2. screwdriver according to claim 1 is characterized in that, the rough surface of described internal layer handle, middle level handle and outer handle.

3. screwdriver according to claim 1 is characterized in that, described handle is middle thin, and two is pluckings; Top is short, following minister's pin shape.

4. according to claim 1 or 3 described screwdrivers, it is characterized in that, the outline in described handle cross section is a regular polygon, and the length of side of this regular polygon is corresponding with the average distance between the staff finger-joint, and the longitudinal strip projection of described middle level handle is arranged on the rib of described regular polygon.

5. screwdriver according to claim 4 is characterized in that, the top of described handle or be provided with a plurality of depressions near the position of front end, and described a plurality of depressions are between the axis of the longitudinal strip projection of described adjacent two middle level handles.

6. screwdriver according to claim 1 is characterized in that, the outer surface of described outer handle is provided with many small depressions or projection.

7. screwdriver according to claim 1 is characterized in that, the ends exposed of described internal layer handle is outside described middle level handle and described outer handle.

8. screwdriver according to claim 1 is characterized in that the bottom of described handle is provided with a through hole, and the axis of described through hole and the axis of screwdriver are in same plane and vertical mutually.