CN110842862A

CN110842862A - Screwdriver joint and fastening tool

Info

Publication number: CN110842862A
Application number: CN201911101106.XA
Authority: CN
Inventors: 高岩
Original assignee: Neusoft Medical Systems Co Ltd
Current assignee: Neusoft Medical Systems Co Ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-02-28

Abstract

The application discloses a screwdriver joint and fastening tool. The screwdriver joint is used for rotating a fastener with an occlusion part and comprises a screwdriver body with an accommodating cavity and a plurality of elastic rods arranged in the accommodating cavity. Each elastic rod can be contracted towards the inside of the containing cavity under the condition of bearing external force and is in a natural state under the condition of not bearing the external force. The shape of the elastic rod in the contraction state and the shape of the elastic rod in the natural state are matched with the shape of the engagement part of the fastener, so that the screwdriver joint is not limited by the type and the specification of the fastener, the situation that a fastening tool and a plurality of fastening tools are frequently replaced is avoided, and the purchase, maintenance and service costs are low.

Description

Screwdriver joint and fastening tool

Technical Field

The application relates to the technical field of tools, in particular to a screwdriver joint and a fastening tool.

Background

Based on the diversification and specificity of the fasteners, each fastener is provided with a special fastening tool, so that the fastening tools are diversified, for example, the specific specifications of the fasteners of the same fastener are different, each specification is provided with a corresponding fastening tool, and for example, the shapes of the fasteners are different, and various fastening tools can be provided, such as a hexagon wrench comprising an inner hexagon handle and an outer hexagon wrench.

Due to the variety of fasteners, at least the following problems can result: 1. in actual work, frequent replacement of the fastening tool may occur; 2. the situation that a certain fastening tool is lacked can occur, and in order to ensure complete tools, a plurality of fastening tools need to be carried, so that the convenience is influenced; 3. high purchasing cost and high maintenance cost.

Disclosure of Invention

To overcome some or all of the problems of the related art, the present application discloses a driver joint. The screwdriver joint is used for rotating a fastener with an occlusion part and comprises a screwdriver body with an accommodating cavity and a plurality of elastic rods arranged in the accommodating cavity. Each elastic rod can be contracted towards the inside of the containing cavity under the condition of bearing external force and is in a natural state under the condition of not bearing the external force. The shape of the elastic rod in the contraction state and the shape of the elastic rod in the natural state are matched with the shape of the occlusion part.

Optionally, the plurality of resilient bars fill the receiving cavity.

Optionally, the plurality of elastic rods are parallel to each other, and/or the diameter of a circumscribed circle of a cross section of each elastic rod along a direction perpendicular to the length direction is 1.5mm to 3 mm.

Optionally, the accommodating cavity comprises an accommodating cavity bottom wall and an opening portion opposite to the accommodating cavity bottom wall, each elastic rod comprises a fixed end connected to the accommodating cavity bottom wall and a head portion opposite to the fixed end, and all the head portions are collectively surrounded by the opening portion.

Optionally, the accommodating cavity comprises an accommodating cavity bottom wall, each elastic rod is connected to the accommodating cavity bottom wall and has a head part relative to the accommodating cavity bottom wall, and the head part is polygonal along a cross section perpendicular to the length direction of the elastic rod.

Optionally, the polygon comprises a regular hexagon, a regular pentagon, or a triangle.

Optionally, the accommodating cavity comprises an accommodating cavity bottom wall, each elastic rod comprises a fixed rod connected to the accommodating cavity bottom wall and an expansion rod connected to the fixed rod through an elastic element, and the expansion rod compresses the elastic element under the condition of bearing pressure and contracts into the fixed rod, and is in a natural state under the condition of no stress.

Optionally, the resilient element is a compression spring.

Optionally, the receiving cavity is cylindrical.

In another aspect, the present application discloses a fastening tool. The fastening tool includes any of the aforementioned driver joints.

The technical scheme provided by the embodiment of the application at least has the following beneficial effects:

1. because the shape of the elastic rod in the contraction state and the elastic rod in the natural state are matched with the shape of the meshing part of the rotary fastener, the shape of the meshing part of the fastener is different, the shape of the elastic rod in the contraction state and the natural state are different, and the whole formed by the elastic piece can be changed according to the shape of the meshing part of the fastener, so the screwdriver joint is not limited by the type and the specification of the fastener, and has at least the following advantages: 1) the condition of frequently changing fastening tool can not appear, 2) the condition that need carry multiple fastening tool can not appear yet, 3) only need purchase this utensil of revolving to connect, and need not purchase multiple fastening tool, purchase, maintenance and maintenance cost hang down.

2. As the accommodating cavities are filled with the elastic rods, the side walls of the accommodating cavities can surround the heads of the elastic rods, so that the heads bear radial force to have fastening torque, and the fastening piece can be effectively rotated. All the heads are gathered together and surrounded by the opening, so that the heads can have radial force and radial torque to effectively rotate the fastener.

4. Because it is cylindric to hold the chamber, like this, effective area is the biggest, prevents to take place the interference phenomenon among the rotatory fastener in-process.

5. Because the head of each elastic rod is polygonal along the section perpendicular to the length direction of the elastic rod, the processing technology is simple, the stress strength of a combined body formed by the elastic rods is high, and particularly, the stress strength is higher under the condition that the section is in a regular hexagon.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic view of a construction of a joint of a driver;

FIG. 2 is an exploded view of a screwdriver tip;

FIG. 3a is a schematic view of a driver bit assembled with a socket head fastener;

FIG. 3b is an exploded view of the driver head and socket head fastener of FIG. 3 a;

FIG. 4 is an exploded view of the driver head and the hex outer fastener;

FIG. 5 is an exploded view of a driver head and an in-line fastener;

FIG. 6 is an exploded view of a driver bit and a cruciform fastener

FIG. 7 is a schematic view of the resilient lever in its natural state;

FIG. 8 is a schematic view of the resilient lever in a compressed state.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Similarly, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one; "plurality" means two or more than two. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items.

Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following embodiments, features of the embodiments can be supplemented with each other or combined with each other without conflict.

Referring to fig. 1 and fig. 2 in combination with fig. 3a, fig. 3b, fig. 4 to fig. 6, a screwdriver joint 100 includes a screwdriver body 1 having a receiving cavity 11 and a plurality of elastic rods 2 disposed in the receiving cavity 11. The shape of the driver body 1 is not limited, and may be cylindrical or prismatic. The shape of the accommodating cavity 11 is not limited as long as the plurality of elastic rods 2 can be accommodated, for example, a cavity surrounded by an accommodating cavity bottom wall and an accommodating cavity side wall. The shape of the bottom wall of the accommodating cavity and the shape of the side wall of the accommodating cavity may be different, such that the shape of the accommodating cavity 11 is different, for example, the bottom wall of the accommodating cavity is circular and the side wall of the accommodating cavity surrounds the bottom wall for a circle, so that the accommodating cavity 11 is cylindrical as shown in fig. 2, for example, the bottom wall of the accommodating cavity is polygonal, and the side wall of the accommodating cavity is a plurality of planes surrounding the bottom wall of the accommodating cavity, so that the accommodating cavity 11 is prismatic, for example, the bottom wall of the accommodating cavity is spherical and the side wall of the accommodating cavity is cylindrical, and so on. The overall shape enclosed by the elastic rods 2 is not limited, and may be cylindrical as shown in fig. 2, or prismatic. In the case where all the elastic rods 2 fill the accommodation chamber 11, the overall shape of the elastic rods 2 is the same as that of the accommodation chamber 11. The elastic rods 2 may be arranged in the accommodating cavity 11 in an array manner, or may be arranged in multiple rows and staggered in the row direction, for example, when viewed vertically, the connecting lines of the elastic rods in adjacent rows are bent lines which are bent back and forth, or arranged in multiple rows and staggered in the row direction, in this case, when viewed horizontally, the connecting lines of the elastic rods in adjacent rows are bent lines which are bent back and forth. Each elastic rod 2 can be contracted inward of the accommodation chamber 11 under the external force and can be in a natural state under the condition of not bearing the external force, so that the elastic rod 2a in the contracted state and the elastic rod 2b in the natural state can be combined into different shapes in the screwdriver joint.

Referring to fig. 3a and 3b, the driver joint is used to rotate a fastener having a bite. The combined shape of the elastic rod 2a in the contracted state and the elastic rod 2b in the natural state matches the shape of the bite. The skilled person will appreciate that one way of matching the shapes is to have the same shape but is not limited thereto as long as the shape fit of the two enables the fastener to be rotated with the driver body 1 rotated. As shown in fig. 3a, in the case where the driver bit 100 is used to rotate the hexagon socket fastener 3a having the engaging portion 31, the engaging portion 31 includes a contact surface 311 and a recess 312. The groove 312 has a regular hexagonal prism shape. The method of rotating the fastener 3a may be as follows: the screwdriver joint 100 is abutted against the hexagon socket head cap fastener 3a, and then a force is applied to make the hexagon socket head cap fastener 3a and the screwdriver joint 100 move relatively, during the movement, a part of the elastic rod 2a is compressed, and another part of the elastic rod 2b is in a natural state (it should be noted that, in fig. 3b, a part of the elastic rod 2a shows that a part of the compressed part is in a natural state, which is just for the sake of making the skilled person to more clearly understand the shape of the combination of the elastic rod 2a in the compressed state and the elastic rod 2b in the natural state, normally, the elastic rod 2a is compressed or extended completely, for example, in the case that the elastic rod is cylindrical and has a relatively small diameter, the whole is compressed or extended, fig. 4 to 6 are also based on the same purpose, some elastic rods 2a are partially compressed), in this way, the combined shape of the elastic bars 2a in the contracted state matches (can be considered to be the same as) the shape of the contact surface 312, and the combined shape of the elastic bars 2 in the natural state matches (can be considered to be the same as) the shape of the concave groove 311, whereby the combined shape of the elastic bars 2a in the contracted state and the elastic bars 2b in the natural state matches the shape of the engaging portion 31. Finally, the tightening or loosening of the socket head cap fastener 3a can be achieved by rotating the driver joint 100 in different directions, for example, rotating the driver joint 100 clockwise tightens the fastener 3a and rotating the driver joint 100 counterclockwise loosens the fastener 3 b.

Referring to fig. 4, in the case that the driver bit 100 is used for fastening the hexagon socket fastener 3b, the engaging portion 31 includes a contact surface 311 and an outer contour 313. After the external hexagonal fastener 3b and the driver joint 100 move relatively, the shape of the elastic rod 2a in the contracted state matches the shape of the contact surface 311, and because the elastic rod 2a is contracted, the elastic rod 2b in the natural state can enclose a shape matching the outer contour 313, and finally, the combined shape of the elastic rod 2a in the contracted state and the elastic rod 2b in the natural state matches the shape of the engagement portion 31. The tightening or loosening of the hexagonal socket head fastener 3b can be achieved by rotating the driver bit 100 in different directions.

Referring to fig. 5 and 6, fig. 5 illustrates the rotation of the in-line fastener 3c, in which case the engaging portion 31 includes an in-line groove 314 and a contact surface 311. The elastic rod 2a in the contracted state is formed in a shape matching the contact surface 311, and the elastic rod 2b in the natural state is formed in a straight shape matching the straight groove 314, and finally combined in a shape matching the engaging portion 31. Fig. 6 illustrates the case of rotating a cross-shaped fastener, in which case the engaging portion 31 includes a cross-shaped recess 315 and a contact surface 311. The elastic rod 2a in the contracted state is formed in a shape matching the contact surface 311, and the elastic rod 2b in the natural state is formed in a cross shape matching the cross-shaped groove 315, and finally combined into a shape matching the engaging portion 31.

With continued reference to fig. 1 to 6, a skilled person will understand that the structure of the elastic rod 2 may be other structures as long as the elastic rod can be contracted towards the accommodating cavity 11 under the condition of bearing an external force and is in a natural state under the condition of not bearing the external force.

Referring to fig. 7 and 8 in combination with fig. 1 to 6, in an embodiment, the elastic rod is a telescopic rod, and the accommodating cavity 11 includes an accommodating cavity bottom wall 111. Each of the elastic bars 2 includes a fixing bar 21 connected to the bottom wall 111 of the receiving chamber and an expansion bar 22 connected to the fixing bar 21 by an elastic member, and the expansion bar 22 compresses the elastic member under pressure to contract into the fixing bar 21, and is in a natural state under an unstressed condition and in a natural state under an unstressed condition. The telescopic rod 22 is in a natural state, that is, the elastic rod 2 is in a natural state, and the telescopic rod 22 is in a contracted state, that is, the elastic rod 2 is in a contracted state. By adopting the way that the telescopic rod 22 extends into the fixing rod 21, the following advantages are achieved: 1) the dead lever 21 can support the telescopic link 22 and realize fixed and support function, 2) dead lever 21 makes the telescopic link 22 realize direction function 3) telescopic link 22 move in dead lever 21 along the axial motion of dead lever 21, and the tube hole that encloses through the pole wall 211 of dead lever 21 carries on spacingly to telescopic link 22, realizes limit function for telescopic link 22 is telescopic motion along the axial of dead lever 21 all the time. The elastic member may be a compression spring, for example, which is connected to the rear portion of the telescopic bar 22 and the fixing bar 21, respectively. Under the condition that the elastic element is adopted, under the condition that the fastener is separated from the elastic rod 2, the elastic rod 2a in the contraction state can automatically recover to the natural state, of course, the structure that a plurality of sleeves are sleeved end to end (similar to an antenna) can be adopted to realize the contraction of the elastic rod 2, and in the structure, after the fastener is separated from the elastic rod 2, the elastic rod 2b in the contraction state cannot automatically recover to the natural state, for example, as shown in fig. 3b and fig. 4 to 6.

With continued reference to fig. 7 to 8, in one embodiment, each of the elastic rods 2 includes a head portion (e.g., the end 221 of the telescopic rod 22 is used as the head portion) fixed to the bottom wall 111 of the accommodating cavity and having a polygonal cross section perpendicular to the length direction of the elastic rod 2 (e.g., the telescopic rod 22 is cylindrical), the length direction is the axial direction of the elastic rod 2, and the length direction is the radial direction perpendicular to the length direction of the elastic rod 2. In one embodiment, the polygon includes a regular hexagon, a regular pentagon, a triangle, or the like.

With continued reference to fig. 1 and 2 in conjunction with fig. 3 to 6, in one embodiment, the plurality of elastic rods 2 fill the accommodating cavity 11. One function of the filling is that the elastic rods 2 do not move along the side wall of the accommodating cavity 11 when the screwdriver body 1 is rotated, for example, the elastic rods 2 do not move in the circumferential direction when the accommodating cavity 11 is cylindrical, after the elastic rods 2 fill the accommodating cavity 11, the outermost elastic rods 2 surround the side wall of the accommodating cavity 11 to form a circle, the accommodating cavity 11 is cylindrical in fig. 1 to 4, and the elastic rods 2 surround the cylinder.

With continued reference to fig. 2 in conjunction with fig. 1 to 6, in one embodiment, the plurality of elastic rods 2 are parallel to each other, and may be understood as a bundle or bundle of elastic rods 2. The diameter of a circumscribed circle of the section of each elastic rod along the direction vertical to the length direction is 1.5 mm-3 mm. The skilled person will understand that the diameter of the circumscribed circle of the cross section of a section of the elastic rod (for example, a section of the telescopic rod 221) which can be merely matched with the engaging part of the fastener is 1.5mm to 3mm, for example, in the case that the cross section of the elastic rod is a regular hexagon, the diameter refers to the diameter of the circumscribed circle of the regular hexagon.

With continued reference to fig. 1 and 2 in conjunction with fig. 3-6, in the above embodiment, the accommodating chamber 11 is cylindrical, and it will be understood by those skilled in the art that other shapes, such as square, etc., are also possible. The function of the receiving cavity 11 at least includes receiving all the elastic rods 2 and surrounding all the elastic rods 2, so that all the elastic rods 2 can have a fastening torque to the fastening member as a whole, thereby facilitating the application of torque to fasten or unfasten the fastening member. As a modified embodiment in which the housing chamber 11 has a cylindrical shape, the housing chamber 11 includes a housing chamber bottom wall 111, an opening 112 opposite to the housing chamber bottom wall 111, and a side portion connected to the housing chamber bottom wall 111 and the opening 112, and in this case, the side portion may be formed by a plurality of connecting rods, and eventually the housing chamber 11 may have a frame shape. The depth of the opening 112 is determined by, for example, the recess of the fastener. Each of the elastic bars 2 includes a fixed end connected to the bottom wall 111 of the accommodating chamber and a head opposite to the fixed end. All the heads are collectively surrounded by the opening 112. For example, in the elastic bar 2 shown in fig. 7 and 8, the end 212 of the fixing bar 21 serves as the fixing end of the elastic bar 2, and the end 221 of the telescopic bar 22 serves as the head.

Based on the technical idea, the application also discloses a fastening tool, and the fastening tool comprises any one of the screwdriver joints. If the screwdriver body 1 is long and the height of the receiving cavity 11 is only a part of its length, the screwdriver body 1 can be used as a rotary handle. The skilled person will also understand that the driver body 1 may also be mounted to a swing handle to be assembled with the swing handle as a fastening tool.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims

1. A screwdriver joint is used for rotating a fastener with an occlusion part and is characterized by comprising a screwdriver body with an accommodating cavity and a plurality of elastic rods arranged in the accommodating cavity;

each elastic rod can be contracted towards the inside of the containing cavity under the condition of bearing external force and is in a natural state under the condition of not bearing the external force;

the shape of the elastic rod in the contraction state and the shape of the elastic rod in the natural state are matched with the shape of the occlusion part.

2. The driver joint of claim 1, wherein the plurality of resilient rods fill the receiving cavity.

3. The screwdriver joint as recited in claim 1, wherein said plurality of resilient bars are parallel to each other, and/or each resilient bar has a diameter of 1.5mm to 3mm along a circumscribed circle of a cross-section perpendicular to the length direction.

4. The screwdriver joint as recited in claim 1, wherein said receiving cavity comprises a receiving cavity bottom wall and an opening opposite said receiving cavity bottom wall, each said resilient rod comprising a fixed end connected to said receiving cavity bottom wall and a head opposite said fixed end, all said heads collectively surrounded by said opening.

5. The screwdriver joint as recited in claim 1, wherein said receiving cavity comprises a receiving cavity bottom wall, each of said elastic rods is connected to the receiving cavity bottom wall and has a head portion opposite to the receiving cavity bottom wall, and the head portion has a polygonal shape in a cross section perpendicular to a length direction of the elastic rod.

6. The screwdriver bit as recited in claim 5, wherein said polygon comprises a regular hexagon, a regular pentagon, or a triangle.

7. The screwdriver joint as recited in any one of claims 1 to 6, wherein said receiving cavity comprises a receiving cavity bottom wall, each of said elastic rods comprises a fixed rod connected to the receiving cavity bottom wall and a telescopic rod connected to the fixed rod by an elastic member, the telescopic rod compresses said elastic member under a pressure to be contracted inward of said fixed rod, and is in a natural state under an unstressed condition.

8. The driver joint of claim 7, wherein the resilient element is a compression spring.

9. The screwdriver tip of any one of claims 1 to 8, wherein said receiving cavity is cylindrical.

10. A fastening tool comprising a driver head according to any one of claims 1 to 9.