An easily interchangeable hand tool

Abstract

A hand tool that is easy to interchange, comprising a handle portion and an interchange mechanism. The handle portion comprises a socket. The interchange mechanism comprises a mounting cylinder, a female lock device, and a male lock rod. The mounting cylinder comprises an insertion cylinder and two lock core slots. The female lock device comprises an unlocking cylinder, two lock core rods, and a restoring elastic member. Two unlocking grooves are arranged on the outer side wall of the unlocking cylinder. The two lock core rods are respectively inserted into the two lock core slots and the two unlocking grooves. The male lock rod comprises an insertion rod and two clamping grooves. The two clamping grooves are respectively used to clamp the lock core rods. The hand tool that is easy to interchange can conveniently realize the replacement of the male lock rod through the interchange mechanism, and can also reduce the types of hand tools. Only the appropriate drive head needs to be replaced, and the drive head is small in size, especially in diameter, and is easy to store and store, and easy to produce, which will greatly reduce the cost of a series of hand tools.

Description

Technical Field

[0001] The invention relates to the technical field of tool manufacturing, and in particular to a hand tool which is easy to interchange. Background Art

[0002] A screwdriver tool used to drive screws and other fasteners usually includes a drive head and a handle such as a connecting rod. The drive head is used to connect with the fastener, and the handle is used to be held by the user to apply power. The drive head has different structures for different screws. For example, the drive head for driving screws has a straight, cross, Pozi, hexagonal, etc., and the drive head for driving nuts has various types of wrenches or sockets, etc.

[0003] Because of the variety of drive head structures, both industrial and household tools are equipped with multiple tools to meet different needs, which not only increases the cost of a series of hand tools, especially in industrial fields such as auto repair shops, but also brings great trouble to people's storage. At the same time, each drive head is equipped with a handle, which will greatly increase the manufacturing cost and material cost. Summary of the invention

[0004] In view of this, the present invention provides a hand tool that is easy to interchange and can improve the above disadvantages to meet the above needs.

[0005] A hand tool that is easy to interchange, comprising a handle portion, and an interchange mechanism fixedly inserted in the handle portion. The handle portion comprises an insertion hole. The interchange mechanism comprises a mounting tube inserted in the insertion hole, a female lock device inserted in the mounting tube, and a male lock rod inserted in the mounting tube and the female lock device. The mounting tube comprises an insertion tube, and two lock core slots respectively penetrating the side walls of the insertion tube. The female lock device comprises an unlocking tube inserted in the insertion tube, two lock core rods respectively located on the side walls of the unlocking tube, and a restoring elastic member sandwiched between the unlocking tube and the insertion tube. The two lock core slots are symmetrically arranged in a plane passing through the central axis of the insertion tube. In a cross section perpendicular to the length direction of the two lock core slots, the two lock core slots are arranged in an outward eight-shaped shape, and one end of each lock core slot closer to the outer side wall of the insertion tube is closer to the restoring elastic member. Two unlocking slots corresponding to the two lock core slots are arranged on the outer side wall of the unlocking tube. The two unlocking grooves are arranged in the same manner as the two lock core grooves, and each of the unlocking grooves is connected to the inner side wall of the unlocking cylinder. The two lock core rods are respectively inserted into the two lock core grooves and the two unlocking grooves. The male lock rod includes an insertion rod inserted into the unlocking cylinder and the insertion cylinder, and two clamping grooves arranged on the side walls of the insertion rod. The two clamping grooves are respectively used to clamp the lock core rod. When the axial length of the recovery elastic member is compressed to the shortest, the lock core rod is located at one end of the outer side wall of the lock core groove closer to the insertion cylinder and the minimum distance between the two lock core rods is greater than the maximum diameter of the male lock rod. When the recovery elastic member is not subjected to external force, the two lock core rods are respectively clamped in the clamping grooves of the male lock rod.

[0006] Furthermore, on a cross section along the central axis of the insertion tube and perpendicular to the arrangement direction of the two lock core rods, the contour line of the unlocking groove includes a clamping section perpendicular to the central axis of the insertion tube, and a sliding section forming an acute angle with the central axis of the insertion tube, and the lock core rod slides along the sliding section.

[0007] Furthermore, a guide column is provided on the outer side wall of the unlocking cylinder, and a guide groove coupled with the guide column is provided on the inner side wall of the inserting cylinder, and the extension direction of the guide column and the guide groove is parallel to the central axis of the inserting cylinder.

[0008] Furthermore, the guide groove is arranged on one side of the opening end of the insertion tube.

[0009] Furthermore, the unlocking cylinder also includes a flange cover, which is arranged on the open end of the insertion cylinder.

[0010] Furthermore, the insertion cylinder is a step cylinder, and the restoring elastic member is arranged between the step of the step cylinder and the end of the unlocking cylinder.

[0011] Furthermore, the insertion tube includes a first insertion tube and a second insertion tube, the first insertion tube is used to be inserted in the unlocking tube, and the second insertion tube is used to insert the male locking rod.

[0012] Furthermore, the cross-sectional shape of the male locking rod is hexagonal, and the cross-sectional shapes of the second inserting cylinder and the unlocking cylinder are also hexagonal.

[0013] Furthermore, the interchange mechanism also includes a push-up spring, and the push-up spring is clamped between the second insertion tube and the male locking rod.

[0014] Furthermore, the two lock core penetration grooves are arranged on the first insertion tube.

[0015] Compared with the prior art, the interchangeable hand tool provided by the present invention can conveniently realize the replacement of the male lock rod through the interchange mechanism, and the male lock rod is provided with a driver head such as a screwdriver bit, so that the driver head can be conveniently replaced. Specifically, when the male lock rod needs to be replaced, as long as the unlocking cylinder is pressed toward the installation cylinder, the unlocking cylinder drives the lock core rod to slide along the end of the central axis of the insertion cylinder toward the end of the outer wall of the insertion cylinder, so that the minimum distance between the two lock core rods is greater than the maximum diameter of the lock core rod, and then the lock core rod is disengaged from the clamping groove of the male lock rod, so that the male lock rod can be taken out for replacement. When the pressing of the unlocking cylinder is released, the unlocking cylinder slides away from the installation cylinder under the support of the restoring elastic member, so as to bring the lock core rod to slide toward the end of the central axis of the insertion cylinder toward the insertion cylinder of the lock core groove, and at the same time, because the lock core rod is inserted in the lock core groove and the unlocking groove, the unlocking cylinder will not be disconnected from the installation cylinder. When the replaced male lock rod is inserted into the unlocking cylinder, the unlocking cylinder is pressed again to make the minimum distance between the two lock core rods larger than the maximum diameter of the male lock core rod, and then the male lock rod is inserted. During the insertion process, the unlocking cylinder is released from the pressing. During the insertion process of the male lock rod, the lock core rod will automatically snap into the snap-in groove, thereby locking the male lock rod to achieve the purpose of replacing the male lock rod. Therefore, such an interchange mechanism can reduce the types of manual tools. Only the appropriate drive head needs to be replaced. The drive head is small in size, especially in diameter, and is easy to store and store, and easy to produce, which will greatly reduce the cost of a series of manual tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the exploded structure of an easily interchangeable hand tool provided by the present invention.

[0017] Figure 2 for Figure 1 A schematic diagram of the main structure of a base for an easily interchangeable hand tool.

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of an engagement block of a selector drive mechanism of an easily interchangeable hand tool.

[0019] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the sleeve of the rotating selection sleeve of the interchangeable hand tool picture . DETAILED DESCRIPTION

[0020] The specific embodiments of the present invention are further described in detail below. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0021] like Figures 1 to 4 As shown in FIG. 1 , it is a schematic diagram of the structure of a hand tool that is easily interchangeable provided by the present invention. The hand tool that is easily interchangeable includes a handle portion 10 and an interchange mechanism 20 that is fixedly inserted in the handle portion. It is conceivable that a peripheral module, such as a sheath, a rubber sleeve for increasing friction, etc., may be provided on the outside of the handle portion 10, and the interchange mechanism 20 may be provided with various screw bits, etc., which are well known to those skilled in the art and will not be described in detail one by one here.

[0022] The handle portion 10 can be made of materials such as rubber or plastic, and is used for a socket 11. The socket 11 is used to set the interchange mechanism 20. It is conceivable that the handle portion 10 can be made into various shapes according to actual needs, so as to facilitate hand holding, improve aesthetics, and increase users' purchasing desire.

[0023] The interchange mechanism 20 includes a mounting tube 21 inserted in the insertion hole 11, a female lock device 22 inserted in the mounting tube 21, a male lock rod 23 inserted in the mounting tube and the female lock device 22, and a top spring 24 sandwiched between the male lock rod 23 and the mounting tube 21. The mounting tube 21 includes an insertion tube 211, and two lock core slots 212 respectively penetrating the side walls of the insertion tube 211. The insertion tube 211 includes a first insertion tube 213 and a second insertion tube 214. The diameter of the first insertion tube 213 is greater than the diameter of the second insertion tube 214, so that the insertion tube 211 becomes a stepped tube. The second insertion tube 213 is used to insert the female lock device 22, so its cross-section is adapted to the corresponding structure of the female lock device 22. The second insertion tube 214 is used to insert the male lock rod 23, so its cross-sectional shape is the same as the cross-sectional shape of the male lock rod 23. In this embodiment, the cross-sectional shapes of the male lock rod 23 and the second insertion tube 214 are both regular hexagons. The two lock core grooves 212 are arranged on the first insertion tube 213. The arrangement direction of the two lock core grooves 212 is perpendicular to the central axis of the insertion tube 211, so that the central axis of the male lock rod 23 after being fixed coincides with the central axis of the insertion tube 211. The two lock core grooves 212 have the same structure, but they are symmetrically arranged in a plane passing through the central axis of the insertion tube 211. In the cross section perpendicular to the length direction of the two lock core groove holes 212, the two lock core grooves 212 are arranged in an outward eight-shaped shape and the end of each lock core groove 212 that is closer to the outer wall of the insertion tube 211 is closer to the restoring elastic member described below. The two lock core grooves 212 are cylindrical slots to prevent the lock core rod 222 described below from slipping out. The insertion tube 211 further includes a plurality of guide grooves 215 disposed on the inner side wall of the first insertion tube 213 , and the guide grooves 215 extend parallel to the central axis of the insertion tube 211 .

[0024] The female lock device 22 includes an unlocking cylinder 221 inserted in the insertion cylinder 211, two lock core rods 222 respectively located on the side walls of the unlocking cylinder 221, and a restoring elastic member 223 sandwiched between the unlocking cylinder 221 and the insertion cylinder 211. The unlocking cylinder 221 includes a cylinder body 2211, two unlocking grooves 2212 arranged on the outer side wall of the cylinder body 2211 and corresponding to the two lock core slots 212 respectively, a plurality of guide columns 2213 arranged around the outer periphery of the cylinder body 2221, and a flange cover 2214 arranged at the end of the cylinder body 2221. The cylinder body 2211 is inserted in the first insertion cylinder 213 of the insertion cylinder 21, and the flange cover 2214 is covered at the end of the first insertion cylinder 213. The existence of the flange cover 2214 can not only limit the concentration of the cylinder body 2211 inserted into the insertion cylinder 211, but also increase the pressing area of ​​the unlocking cylinder 221. The two unlocking grooves 2212 are arranged in the same manner as the two lock core grooves 213, and each unlocking groove 2212 is connected to the unlocking cylinder 221, i.e., the inner side wall of the cylinder body 2211, so that when the lock core rod 222 is inserted into the lock core groove 213 and the unlocking groove 2212, the lock core rod 221 can interfere with the cylinder body 2211 to clamp the male lock rod 23. On the cross section along the central axis of the insertion cylinder 211 and perpendicular to the arrangement direction of the two lock core rods 221, the contour line of the unlocking groove 2212 includes a clamping section 2215 perpendicular to the central axis of the insertion cylinder 211, and a sliding section 2216 that forms an acute angle with the central axis of the insertion cylinder 211. The extension direction of the guide column 2213 is parallel to the central axis of the insertion cylinder 211 and is coupled to the guide groove 215 to guide the movement direction of the unlocking cylinder 221 and prevent the unlocking cylinder 221 from rotating relative to the insertion cylinder 211 .

[0025] The lock core rod 222 can be a round stick, which is conducive to rolling and reduces friction. When the lock core rod 222 is inserted into the unlocking groove 2212 and the lock core groove 212, the installation cylinder 21 and the unlocking cylinder 221 can be connected together. At the same time, when the lock core rod 222 presses the unlocking cylinder 221, the lock core rod 222 can move in the unlocking cylinder 221 and the lock core groove 212. Even if the lock core rod 222 slides along the sliding section 2216, it also moves in the lock core groove 212.

[0026] The restoring elastic member 223 is sandwiched between the steps formed by the unlocking cylinder 221 and the first and second insertion cylinders 213 and 214 of the insertion cylinder 211, thereby pressing against the unlocking cylinder 221 to move it away from the insertion cylinder 211. However, due to the existence of the lock core rod 222, the restoring elastic member 223 will not cause the unlocking cylinder 221 to separate from the insertion cylinder 211, and will also tighten the connection between the lock core rod 222 and the unlocking groove 2212 and the lock core groove 212.

[0027] The male lock rod 23 includes an insertion rod 231 inserted in the unlocking cylinder 221 and the insertion cylinder 211, and two clamping grooves 232 arranged on the side wall of the insertion rod 231. It is conceivable that one end of the insertion rod 231 is also provided with one of a plurality of forms of driving heads, such as a straight line, a cross, a fen, a hexagonal, etc. The cross-sectional shape of the insertion rod 231 is a polygon to avoid rotation. In this embodiment, the cross-sectional shape of the insertion rod 231 is a regular hexagon. The clamping groove 232 is used to clamp with the lock core rod 222, so the cross-sectional shape of the clamping groove 232 should be the same as the cross-sectional shape of the lock core rod 222. In this embodiment, the cross-sectional shape of the clamping groove 232 is an arc shape, and its central angle is less than 180 degrees, so as to facilitate the lock core rod 222 to enter and exit the clamping groove 232.

[0028] The push-up spring 24 is sandwiched between the end of the male lock rod 23 and the bottom of the second insertion tube 214, which is conducive to tightening the male lock rod 23 and preventing the male lock rod 23 from shaking along the central axis of the insertion tube 211 during use due to the existence of a gap formed by tolerance. In addition, due to the existence of the push-up spring 24, when the lock core rod 222 is disengaged from the clamping groove, the push-up spring 24 can also directly eject the male lock rod 23, improving the replacement experience.

[0029] When replacing, press the unlocking cylinder 221 to make the lock core rod 222 slide from the end close to the central axis of the insertion cylinder to the end close to the outer wall of the insertion cylinder 211, that is, when the axial length of the restoring elastic member 223 is compressed to the shortest, the lock core rod 222 is located at the end of the outer wall of the lock core groove 212 closer to the insertion cylinder 211 and the minimum distance between the two lock core rods 222 is greater than the maximum diameter of the male locking rod 23, so that the locking groove 232 on the male locking rod 23 disengages the lock core rod 222, and then the male locking rod 23 can be pulled out for replacement. During insertion, similarly, the unlocking cylinder 221 is pressed again to make the minimum distance between the two lock core rods 222 greater than the maximum diameter of the male lock rod 23, and then the male lock rod 23 is inserted. During the insertion process, the unlocking cylinder 221 is released from the pressing. During the insertion process of the male lock rod 23, the lock core rod 222 is automatically engaged in the engaging groove 232, thereby locking the male lock rod 23 to achieve the purpose of replacing the male lock rod 23. It can be understood that when the restoring elastic member 223 is not subjected to external force, the two lock core rods 222 are respectively engaged in the engaging grooves 232 of the male lock rod 23.

[0030] Compared with the prior art, the interchangeable hand tool provided by the present invention can conveniently realize the replacement of the male lock rod 23 through the interchange mechanism 20, and the male lock rod 23 is provided with a driver head such as a screwdriver bit, so that the driver head can be conveniently replaced. Specifically, when the male lock rod 23 needs to be replaced, as long as the unlocking cylinder 221 is pressed toward the installation cylinder 21, the unlocking cylinder 221 drives the lock core rod 222 to slide along the end of the lock core groove 212 facing the central axis of the insertion cylinder 211 toward the end of the outer wall close to the insertion cylinder 211, so that the minimum distance between the two lock core rods 222 is greater than the maximum diameter of the lock core rod 222, thereby disengaging the lock core rod 222 from the engagement groove 232 of the male lock rod 23, so that the male lock rod 23 can be taken out for replacement. When the unlocking cylinder 221 is released from the pressure, the unlocking cylinder 221 slides away from the installation cylinder 21 under the pressure of the restoring elastic member 223, thereby bringing the lock core rod 222 to slide toward the end of the central axis of the insertion cylinder 211 facing the lock core groove 212, and at the same time, since the lock core rod 222 is inserted in the lock core groove 212 and the unlocking groove 2212, the unlocking cylinder 221 will not be disconnected from the installation cylinder 21. When the replaced male lock rod 23 is inserted into the unlocking cylinder 221, the unlocking cylinder 221 is pressed again so that the minimum distance between the two lock core rods 222 is greater than the maximum diameter of the male lock rod 23, and then the male lock rod 23 is inserted. During the insertion process, the unlocking cylinder 221 is released from the pressure. At the same time, during the insertion process of the male lock rod 23, the lock core rod 222 will automatically snap into the snap-in groove 232, thereby locking the male lock rod 23 to achieve the purpose of replacing the male lock rod 23. Therefore, such an interchangeable mechanism 20 can reduce the types of manual tools. Only the appropriate drive head needs to be replaced. The drive head is small in size, especially in diameter, and is easy to store and preserve, and easy to produce, which will greatly reduce the cost of a series of manual tools.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A hand tool that is easily interchangeable, characterized in that: The interchangeable hand tool comprises a handle portion and an interchange mechanism fixedly inserted in the handle portion, the handle portion comprises an insertion hole, the interchange mechanism comprises a mounting tube inserted in the insertion hole, a female lock device inserted in the mounting tube, and a male lock rod inserted in the mounting tube and the female lock device, the mounting tube comprises an insertion tube, and two lock core slots respectively penetrating the side walls of the insertion tube, the female lock device comprises an unlocking tube inserted in the insertion tube, and two male lock rods respectively located in the unlocking tube. The lock core rod is on the side wall of the cylinder, and a restoring elastic member is sandwiched between the unlocking cylinder and the insertion cylinder. The two lock core slots are symmetrically arranged in a plane passing through the central axis of the insertion cylinder. In the cross section perpendicular to the length direction of the two lock core slots, the two lock core slots are arranged in an outward eight-shaped shape, and the end of each lock core slot closer to the outer side wall of the insertion cylinder is closer to the restoring elastic member. Two unlocking grooves corresponding to the two lock core slots are arranged on the outer side wall of the unlocking cylinder, and the arrangement method of the two unlocking grooves is the same as that of the two The lock core grooves are arranged in the same manner and each of the unlocking grooves is communicated with the inner side wall of the unlocking cylinder. Two lock core rods are respectively arranged in the two lock core grooves and the two unlocking grooves. The male lock rod includes an insertion rod inserted in the unlocking cylinder and the insertion cylinder, and two clamping grooves arranged on the side walls of the insertion rod. The two clamping grooves are respectively used to clamp the lock core rods. When the axial length of the restoring elastic member is compressed to the shortest, the lock core rod is located at one end of the outer side wall of the lock core groove closer to the insertion cylinder and the minimum distance between the two lock core rods The lock core rod is larger than the maximum diameter of the lock core rod. When the recovery elastic member is not subjected to external force, the two lock core rods are respectively clamped in the clamping groove of the male lock rod. On the cross section along the central axis of the insertion cylinder and perpendicular to the arrangement direction of the two lock core rods, the contour line of the unlocking groove includes a clamping section perpendicular to the central axis of the insertion cylinder, and a sliding section forming an acute angle with the central axis of the insertion cylinder. The lock core rod slides along the sliding section. The insertion cylinder is a step cylinder, and the recovery elastic member is arranged between the step of the step cylinder and the end of the unlocking cylinder.

2. The interchangeable hand tool according to claim 1, characterized in that: A guide column is also arranged on the outer side wall of the unlocking cylinder, and a guide groove coupled with the guide column is arranged on the inner side wall of the inserting cylinder. The extending directions of the guide column and the guide groove are parallel to the central axis of the inserting cylinder.

3. The interchangeable hand tool according to claim 2, characterized in that: The guide groove is arranged on one side of the opening end of the insertion tube.

4. The interchangeable hand tool according to claim 1, characterized in that: The unlocking cylinder also includes a flange cover, which is arranged on the open end of the insertion cylinder.

5. The interchangeable hand tool according to claim 1, characterized in that: The inserting cylinder includes a first inserting cylinder and a second inserting cylinder. The first inserting cylinder is used to be inserted in the unlocking cylinder, and the second inserting cylinder is used to insert the male locking rod.

6. The interchangeable hand tool according to claim 5, characterized in that: The cross-sectional shape of the male locking rod is hexagonal, and the cross-sectional shapes of the second inserting cylinder and the unlocking cylinder are also hexagonal.

7. The interchangeable hand tool according to claim 5, characterized in that: The interchange mechanism further comprises a resisting spring, and the resisting spring is sandwiched between the second inserting tube and the male locking rod.

8. The interchangeable hand tool according to claim 5, characterized in that: The two lock core penetration grooves are arranged on the first insertion tube.

Images