TW201700225A - Quick-release device for bits - Google Patents

Abstract

A quick-release device for bits includes a shank, a sleeve reciprocally movably mounted onto the shank and a stopper secured on a distal end of the shank to prevent the sleeve from detaching from the shank. The shank has a polygonal hole longitudinally defined in a first end thereof and adapted for receiving a body of the bit. At least one indentation is defined in the first end of the shank and an annular groove is peripherally defined in the polygonal hole, wherein an expandable holder is received in the annular groove. The annular groove communicates with the at least one indentation and has a tapered portion formed toward the first end of the shank. The sleeve includes at least one block inwardly extending therefrom and slidably received in the at least one indentation, wherein the at least one block and the at least one indentation complementally correspond to each other. The at least one block presses the holder when detaching the bit from the shank.

Description

Quick-release structure

The present invention relates to a quick release structure; in particular to an innovative structure for mounting a screwdriver bit.

According to the general daily life, people often use a hand tool to install a screwdriver head to disassemble items (such as DIY assembly furniture). Due to the variety of components, the hand tools need to be able to replace various types of screwdriver heads to match the components. According to various types, it can be seen that if the screwdriver head can be replaced more quickly and conveniently, the smoothness of use can be increased. The conventional hand tool structure is provided with a set of sockets at the working end of the hand tool to set the corresponding screwdriver head, and the fixed type of the screwdriver head is mostly formed by the steel ball engagement type, since the steel ball engagement type is required The steel ball is disposed on the inner side wall of the sleeve, and then an outer sleeve is sleeved on the outer side of the sleeve, and the bead groove is arranged on the inner side of the outer sleeve to drive the steel ball, thereby selectively clamping or releasing the screwdriver head. The internal space of the socket is limited. Therefore, it is not only inconvenient to install the spring and the steel ball in a limited space, but also the processing difficulty is high, and the processing cost of the socket is relatively increased. Moreover, in order to process the bead groove, the sleeve must have a certain wall thickness, and a certain structural strength can be maintained after processing, so that the diameter of the entire sleeve is thickened, not only wasting material, but also making the whole The weight of the group tool is not easy to carry, and the use and operation are also inconvenient for a small operation space.

Therefore, in view of the problems existing in the above-mentioned conventional technologies, how to develop an innovative structure that can be more ideal and practical, and the relevant industry should further consider the goals and directions of breakthrough.

In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After the detailed design and careful evaluation of the above objectives, the inventor has finally obtained the practical invention.

The main object of the present invention is to provide a quick-release structure for a screwdriver, and the technical problem to be solved is to develop a new quick-release structure with a low cost and easy assembly, which is more ideal and practical. The goal is to think about innovative breakthroughs.

The technical feature of the present invention is mainly that the quick-release structure of the screwdriver head comprises a rod body, and the first end of the rod body is axially formed with a polygonal hole for inserting the sub-head. The first end of the rod is formed with at least one slit. The inner wall of the polygonal hole is formed with a ring groove communicating with the slot, and the ring groove is provided with a tapered portion toward the end of the first end of the rod; a limiting member with an expanding capability, the limiting gap The sleeve is disposed in the ring groove; a sliding sleeve is disposed on the first end of the rod body, and the inner wall of the sliding sleeve is convexly provided with at least one stopper, and the at least one stopper is disposed in a corresponding section In the slot, and complementary to the corresponding slot; when the driver is to be removed, the block is pressed against the limiting member. A limiting structure fixed at the end of the rod body, the limiting structure is to prevent the sliding sleeve from sliding off the rod body.

The main effects and advantages of the present invention are that it can get rid of the traditional use of the spring and steel ball locking limit mode, and use the ring-shaped limit member, so the assembly is simple and the commercially available standard parts can be used, so the material is relatively cheap, Significantly reduce the manufacturing cost of the quick-release structure of the screwdriver. Furthermore, since it is no longer necessary to machine the bead groove and install the spring and the steel ball, and it is not necessary to install the outer casing in a sliding manner, the wall thickness of the rod body can be greatly reduced, and the wall thickness of the sliding sleeve is equivalent to the rod body and the socket. The diameter of the segment is poor, so there is no increase in the overall body and weight of the rod body, which can effectively reduce the weight of the tool set and is convenient to carry.

Please refer to Figures 1, 2, 3 and 4, which are preferred embodiments of the quick-release structure of the present invention, but the embodiments are for illustrative purposes only and are not limited by the structure in the patent application. The quick-release structure of the screwdriver includes a rod body 10, a sleeve 20 disposed on the rod body 10, and a limiting structure 30 fixed to the end of the rod body 10, the limiting structure 30 series The sliding sleeve 20 is prevented from slipping off the shaft 10.

The first end of the rod body 10 is axially formed with a polygonal hole 11 for inserting the shaft of the sub-head 40. The outer wall of the driver head 40 is formed with an annular card slot 41. The first end of the rod 10 is provided with a set of connecting segments 12. The end portion of the socket portion 12 is formed with at least one slit 13 . In the preferred embodiment of the present invention, the diameter of the sleeve portion 12 is smaller than the diameter of the rod body 10 , and the difference in diameter between the two is equal to the sleeve 20 . The wall is thick; the number of the slots 13 is set to two, and the two slots 13 are located at both ends of the same diameter of the rod 10. A ring groove 14 is formed in the inner wall of the socket portion 12, and the ring groove 14 is in communication with the at least one slot 13 and the ring groove 14 is provided with a tapered portion 15 toward the end of the socket portion 12. An outer limiting member 16 is received in the annular groove 14. The outer diameter of the limiting member 16 is slightly smaller than the inner diameter of the annular groove 14. In the preferred embodiment of the present invention, the limiting member 16 is a C-shaped buckle, and may of course also be an O-ring. In addition, the second end of the creative rod body 10 can further extend a binding post 17 to insert the rod body 10 of the present invention into a holding structure (not shown) for facilitating the operation of the screwdriver head 40. bolt.

The sliding sleeve 20 is sleeved on the socket portion 12 and reciprocally movable relative to the socket portion 12, and the inner wall of the sliding sleeve 20 is convexly provided with at least one stopper 21, and the number of the stoppers 21 The at least one stop 21 is received in a corresponding slot 13 and complements the corresponding slot 13 in accordance with the number of the slots 13 .

Please refer to the figures 1 , 5 and 6 . When the creation is to assemble the screwdriver head 40 , the bottom end of the screwdriver head 40 is directly inserted into the polygonal hole 11 , and the bottom end of the screwdriver head 40 runs through the limit. After the member 16, as shown in Fig. 9, the stopper 16 is slightly extended outward by the shaft of the bit 40, and at this time, the bit 40 continues to extend toward the inside of the polygonal hole 11. As shown in FIG. 10, when the limiting member 16 corresponds to the slot 41 of the outer wall of the screwdriver head 40, it is fastened to the upper end of the slot 40 of the slot 41. At this time, the end of the screwdriver head 40 is exactly the same. The bottom of the polygonal hole 11 allows the user to use the screwdriver bit 40 to rotate the bolt. In this state, if the screwdriver head 40 is to be pulled out in the reverse direction, the screwdriver head 40 will carry the limiting member 16 outward, and the tapered portion 15 then pushes the limiting member 16 inwardly, so that the limiting member 16 is caused. The tightening of the screwdriver head 40, coupled with the stopping action of the end edge of the tapered section 15, naturally prevents the driver head 40 from being directly removed from the shaft 10 of the present invention in this manner.

Please refer to the figures 1, 7, 8, and 11 again. When the user wants to replace the screwdriver head 40, the sliding sleeve 20 is first pushed to press the stopper 21 against the limiting member 16, and the user is in this manner. When the screwdriver head 40 is pulled down, the stopper 16 is not moved in the tapered portion 15 due to the pressing of the stopper 21, but is expanded out of the slot 41 by the action of the shaft of the screwdriver 40. When the user can pull out the screwdriver head 40. It is convenient to store, or install a different size of the screwdriver head 40, continue to operate.

Advantages of the Invention: The "starter head quick-release structure" disclosed in the present invention is capable of utilizing the novel structure and technical features of the invention, and the present invention can be utilized in comparison with the conventional structure proposed in [Prior Art] The special structural combination achieves the following advantages: 1. Reduced cost: This creation is free from the traditional use of the casing and steel ball restraint mode, and the ring-shaped limiter 16 is used, so the assembly is simple and can be used as a commercially available standard. Therefore, the material is relatively cheap, which can greatly reduce the manufacturing cost of the quick-release structure of the screwdriver. 2. Since the bead groove and the steel ball are no longer needed for the socket tube and the outer casing, the wall thickness of the rod body can be greatly reduced, and the wall thickness of the sliding sleeve 20 of the present invention is equivalent to the rod body 10 and the sleeve portion 12 The difference in diameter is not so much for the overall body and weight of the rod body 10, which can effectively reduce the weight of the tool set and is convenient to carry.

The above embodiments are intended to be illustrative of the present invention, and are not to be construed as limiting the scope of the invention. The principles are changed and modified to achieve an equivalent purpose, and such changes and modifications are to be included in the scope defined by the scope of the patent application as described later.

10‧‧‧ rods 11.‧ ‧ polygonal holes 12 ‧ ‧ sockets 13 ‧ ‧ grooving 14 ‧ ‧ ring groove 15 ‧ ‧ tapered section 16 ‧ ‧ limit parts 17 ‧ ‧ combination Column 20‧‧‧Sleeve 21‧‧‧Block 30‧‧‧Limited structure 40‧‧‧Starter head 41‧‧‧ card slot

Figure 1 is a perspective view of the present invention. Figure 2 is a perspective exploded view of the present invention. Figure 3 is a cross-sectional view showing the decomposition of the present invention. Figure 4 is a front view of the invention. Figures 5-11 are schematic views of the actions of the present invention.

10‧‧‧ rod body

11‧‧‧Polygonal holes

12‧‧‧ Sockets

13‧‧‧ slotting

14‧‧‧ Ring groove

15‧‧‧Constriction

16‧‧‧Limited parts

17‧‧‧ binding column

20‧‧‧Sleeve

21‧‧ ‧block

30‧‧‧Limited parts

Claims (7)

The utility model relates to a quick-release structure of a screwdriver, which mainly comprises: a rod body, the first end of the rod body is axially formed with a polygonal hole for inserting a sub-head; the first end of the rod body is formed with at least One slot. The inner wall of the polygonal hole is formed with a ring groove communicating with the slot, and the ring groove is provided with a tapered portion toward the end of the first end of the rod; a limiting member for expanding the capacity, the limiting member The sleeve is placed in the ring groove, and the outer diameter of the limiting member is slightly smaller than the inner diameter of the ring groove; a sliding sleeve is disposed on the first end of the rod body, and the inner wall of the sliding sleeve is convexly provided with at least one block a block, and the at least one block is received in a corresponding slot and complements the corresponding slot; when the driver is to be removed, the block is pressed against the limiter Therefore, the limiting member cannot contact the tapered portion due to the movement; a limiting structure fixed at the end of the rod body, the limiting structure prevents the sliding sleeve from sliding off the rod body. The quick-release structure of the screwdriver head according to claim 1, wherein the first end of the rod body is provided with a set of joints; the at least one slit is formed at an end of the sleeve portion, the sleeve portion The diameter is smaller than the diameter of the rod, and the difference in diameter between the two is equal to the wall thickness of the sleeve. The quick-release structure of the screwdriver head according to claim 1 or 2, wherein the limiting member is a C-shaped buckle. The quick-release structure of the screwdriver head according to claim 1 or 2, wherein the limiting member is an O-ring. The quick-release structure of the screwdriver head according to claim 1 or 2, wherein the second end of the rod body has a coupling post extending to insert the rod body of the present invention onto a holding structure. The quick-release structure of the screwdriver according to claim 3, wherein the second end of the rod extends with a binding post to insert the rod of the present invention onto a holding structure. The quick-release structure of the screwdriver according to claim 4, wherein the second end of the rod extends with a binding post to insert the rod of the present invention onto a holding structure.