TWI872511B - Locking tool with eccentric occlusion - Google Patents

Abstract

A locking tool with eccentric occlusion. One end of the locking tool is a wrench connecting portion. The other end of the locking tool is a bite hole. The inner wall of the occlusion hole has a plurality of main positioning grooves recessed outward. Between adjacent main positioning grooves, there is a protruding portion protruding inward. Each bump has an auxiliary positioning slot that presents an outward recess. Each auxiliary positioning groove comprises a long arc section and a short arc section which are connected with each other, and the connecting position of the long arc section and the short arc section of each auxiliary positioning groove deviates from the center position of the corresponding protruding part. The depth of each auxiliary positioning groove is less than the depth of each main positioning groove.

Description

Locking tool with eccentric bite

The invention relates to a locking tool with eccentric bite, which is used to be connected with a wrench so that the user can tighten or loosen the screw.

A wrench is a very common hand tool, generally used to loosen and tighten screws, nuts, etc. However, common open-end wrenches require a larger operating space to be used smoothly and continuously. If used in a small room, it will be restricted by the environment. After the wrench is swung at a slight angle, it must be removed, and then the screw must be put back on to turn it, which is quite time-consuming. Therefore, the relevant technical field has further developed a ratchet wrench, which allows users to keep turning the wrench without removing it from the screw, which is very convenient to use in a small environment.

In addition, the aforementioned wrenches have evolved into many styles according to different purposes. For example, repairing a piece of equipment often requires more than one size of wrench, but carrying multiple wrenches will undoubtedly greatly increase the weight of the tool box (bag), thereby increasing the difficulty of carrying. Therefore, a wrench that can quickly replace the wrench head has appeared on the market. Compared with carrying multiple wrenches of different sizes, the aforementioned wrench only needs to carry one wrench body and multiple wrench heads corresponding to different screws. In comparison, it can undoubtedly save a lot of overall weight and space, and indeed reduces the difficulty of carrying.

Although the aforementioned wrenches have greatly improved the difficulty of carrying wrenches of different sizes, there are still some unresolved problems. For example, the screw head of a new screw can be easily bitten by the wrench head with intact corners, but there is inevitably a tolerance between the wrench head and the screw in manufacturing, so that when the wrench head bites the screw head, there is actually a gap between the wrench head and the screw head. This gap will cause the wrench head to constantly wear the screw during the use of the wrench, and the screw head with serious corner damage can no longer be stably bitten by the wrench head, so that the user has difficulty in tightening and loosening it.

In view of the fact that tolerances between the wrench head and the screw head are unavoidable during manufacturing, the present invention aims to improve the wrench head (locking tool) in such a way that even if the corners of the screw head are severely damaged, the locking tool can still engage the screw head well. The most important improvement is the plurality of auxiliary positioning grooves, each of which includes a long arc segment and a short arc segment connected to each other. This allows the auxiliary positioning grooves to better engage the damaged corners of the screw head when the locking tool is rotated, thereby effectively improving the problem that the screw head is difficult to rotate when it is damaged.

In order to achieve the above-mentioned purpose and effect, the present invention provides a locking tool with eccentric bite, wherein: one end of the locking tool is a wrench connecting part, and the other end of the locking tool is a bite hole, the inner wall of the bite hole has a plurality of main positioning grooves that are recessed outward, and there is a raised part that is raised inward between each adjacent main positioning groove, and each raised part has an auxiliary positioning groove that is recessed outward, wherein each auxiliary positioning groove includes a long arc segment and a short arc segment connected to each other, and the connection position of the long arc segment and the short arc segment of each auxiliary positioning groove deviates from the center position of the corresponding raised part, and the recess depth of each auxiliary positioning groove is less than the depth of each main positioning groove.

Furthermore, the number of each protrusion and the corresponding auxiliary positioning groove is an even number, each auxiliary positioning groove is grouped into two adjacent auxiliary positioning grooves, and each group of adjacent auxiliary positioning grooves faces each other with a short arc segment.

To understand the implementation of the present invention in more detail, please refer to the drawings. As shown in the first and second figures, the present invention provides a locking tool 1 with eccentric engagement, wherein: one end of the locking tool 1 is a wrench connecting portion 11, and the other end of the locking tool 1 is an engagement hole 12. The inner wall of the engagement hole 12 has a plurality of main positioning grooves 121 that are recessed outwards, and between each adjacent main positioning groove 121, there is a raised portion 12 that is raised inwards. 2. Each protrusion 122 has an auxiliary positioning groove 123A~F that is recessed outward, wherein each auxiliary positioning groove 123 includes a long arc segment 1231 and a short arc segment 1232 connected to each other, and the connecting position of the long arc segment 1231 and the short arc segment 1232 of each auxiliary positioning groove 123A~F deviates from the center position of the corresponding protrusion 122, and the recessed depth of each auxiliary positioning groove 123A~F is less than the depth of each main positioning groove 121.

The above content is followed to further describe the implementation of the present invention. When the present invention is actually used, the wrench connecting portion 11 is movably assembled with the wrench body. The present invention can have different sizes according to the manufacturer's plan. The specific engagement of the present invention with the damaged screw head 100 is shown in the third figure. It can be seen that under normal use, the present invention utilizes each protrusion 122 and each main positioning groove 121 to engage the screw head 100.

Generally speaking, with current manufacturing technology, the problem of tolerance between the wrench head (locking tool 1) and the screw head 100 is unavoidable during manufacturing. Therefore, the improvement direction of the locking tool 1 of the present invention is that even if the corners of the screw head 100 are severely damaged, the locking tool can still bite it well. The most important improvement point is the multiple auxiliary positioning grooves 123A~F.

The specific pattern of each auxiliary positioning groove 123A~F is shown in the second figure. Each auxiliary positioning groove 123A~F includes a long arc segment 1231 and a short arc segment 1232 connected to each other, and the connection position of the long arc segment 1231 and the short arc segment 1232 (points A~F in the figure are used to help identify the connection position of each long arc segment 1231 and the corresponding short arc segment 1232) The center position of the corresponding protrusion 122 is deviated (the imaginary lines L1-L6 in the figure help to identify the center position of each protrusion 122), so that the auxiliary positioning groove 123 can better engage the damaged corner of the screw head 100 when the locking tool 1 is rotated, and because the width α in the aforementioned structural diagram is greater than the width β, for example, the width α is 27.18 mm and the width β is 27.11 mm.

Next, an embodiment is provided to prove that the present invention can indeed engage the damaged corner of the screw head 100. First, as shown in the second figure, the number of each protrusion 122 and the corresponding auxiliary positioning groove 123A~F is an even number (this embodiment takes the number six as an example), and each auxiliary positioning groove 123A~F is a group of two adjacent auxiliary positioning grooves (123A and 123B), (123C and 123D), (123E and 123F). Each group of adjacent auxiliary positioning grooves (123A and 123B), (123C and 123D), (123E and 123F) faces each other with a short arc segment 1232. The advantage of this structure is that the auxiliary positioning grooves at the intervals (123A and 123C and 123E), (123B and 123E and 123F) their short arc segments 1232 will face the same direction, so that the present invention can be engaged with the damaged screw head 100 by the auxiliary positioning groove (123B and 123E and 123F) when the clock is rotated as shown in the fourth figure, and the corresponding short arc segment 1232 pushes the screw head 100 to rotate. When the present invention is rotated counterclockwise as shown in the fifth figure, the auxiliary positioning grooves (123A, 123C and 123E) can engage with the damaged screw head 100, and the corresponding short arc segment 1232 pushes the inner side of the screw head 100 to rotate, thereby achieving that no matter what the rotation direction of the present invention is, it can well engage with the damaged screw head 100 and drive it to rotate.

In summary, the present invention can truly improve the problem that the screw head is difficult to rotate when it is damaged, and the present invention is truly novel and progressive.

The above is only used to explain the preferred embodiments of the present invention, and is not intended to limit the present invention in any form. Therefore, any modifications or changes made to the present invention under the same spirit of the invention, which are other forms that can be implemented and have the same effect, should still be included in the scope of protection intended by the present invention.

In summary, the present invention of "locking tool with eccentric bite" is indeed fully in line with the needs of industrial development in terms of practicality and cost-effectiveness, and the disclosed structural invention is also an unprecedented innovative structure, so there is no doubt that it is "novel". Moreover, the present invention can improve the effectiveness of the conventional structure, so it is also "progressive". It fully complies with the provisions of the application requirements of invention patents under the Patent Law of our country. Therefore, a patent application is filed in accordance with the law, and we sincerely request the Jun Bureau to review and affirm it as soon as possible.

1: Locking tool 11: Wrench connection 12: Engagement hole 121: Main positioning groove 122: Raised part 123: Auxiliary positioning groove 123A: Auxiliary positioning groove 123B: Auxiliary positioning groove 123C: Auxiliary positioning groove 123D: Auxiliary positioning groove 123E: Auxiliary positioning groove 123F: Auxiliary positioning groove 1231: Long arc segment 1232: Short arc segment 100: Screw head L1: Center line L2: Center line L3: Center line L4: Center line L5: Center line L6: Center line A: Point B: Point C: Point D: Point E: Point F: Point α: Width β: Width

The first figure is a three-dimensional schematic diagram of the present invention. The second figure is a three-dimensional schematic diagram of the present invention. The third figure is a schematic diagram of the present invention with an undamaged screw head engaged. The fourth figure is a schematic diagram of the present invention with a damaged screw head engaged by clockwise rotation. The fifth figure is a schematic diagram of the present invention with a damaged screw head engaged by counterclockwise rotation.

1: Locking tool

11: Wrench connection part

12: Bite hole

121: Main positioning slot

122: bulge

123: Auxiliary positioning slot

Claims (2)

A locking tool with eccentric bite, wherein: One end of the locking tool is a wrench connection part, and the other end of the locking tool is a bite hole. The inner wall of the bite hole has a plurality of main positioning grooves that are concave outward, and there is a raised part that is raised inward between each adjacent main positioning groove. Each raised part has an auxiliary positioning groove that is concave outward, wherein each auxiliary positioning groove includes a long arc segment and a short arc segment connected to each other, and the connection position of the long arc segment and the short arc segment of each auxiliary positioning groove deviates from the center position of the corresponding raised part. The concave depth of each auxiliary positioning groove is less than the depth of each main positioning groove. The number of the plurality of positioning grooves, each raised part, and each auxiliary positioning groove is six. A locking tool with eccentric bite as described in claim 1, wherein each auxiliary positioning groove has a short arc segment facing the short arc segment of the auxiliary positioning groove on one side adjacent to it and a long arc segment facing the long arc segment of the auxiliary positioning groove on the other side adjacent to it.

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