Securing unit for securing adapter to wrench

Abstract

A wrench includes a handle and a driving head and a ratchet ring with a receiving hole is received in the driving head. An adapter is detachably inserted into the receiving hole and has a neck, an engaging portion and a reception hole. The neck on first end of the engaging portion has a first groove. A second groove is defined in the second end of the engaging portion. Multiple holes are defined through the bottom of the second groove and communicate with the reception hole. 33 A clip is engaged with the second groove and partially protrudes beyond the holes and exposed in the reception. A securing unit is connected to the driving head to secure or release the adapter. The receiving hole is connected with larger bits or sockets, and the adapter is connected with smaller bits or sockets.

Claims

1. A wrench comprising: a handle and a driving head which has a ratchet ring installed therein, the ratchet ring having a receiving hole, which is a is a polygonal hole; an adapter detachably inserted into the receiving hole and having a neck, an engaging portion and a reception hole defined through the neck and the engaging portion, the engaging portion of the adapter being a polygonal portion, a first groove defined in an outside of the neck which extends from a first end of the engaging portion, a second groove defined in an outside of a second end of the engaging portion, multiple holes defined through a bottom of the second groove and communicating with the reception hole, a shoulder extending inward and radially from an inner periphery of the reception hole of the adapter, the shoulder located corresponding to the neck so as to be adapted to stop a bit or a socket in the reception hole; a clip engaged with the second groove and partially protruding beyond the holes and exposed in the reception hole, and a securing unit connected to the driving head and securing or releasing the adapter relative to the receiving hole, the securing unit having a shifter and a spring, the driving head having a slot in which the shifter is inserted, a first end of the shifter located beyond the slot and a second end of the shifter pivotably connected to the driving head, the first end of the shifter inserted into the receiving hole and engaged with the first groove of the adapter, the driving head having a first recess, the first end of the shifter having a second recess which is located corresponding to the first recess, the spring received between the first and second recesses, wherein when pivoting the shifter, the spring is compressed so that the first end of the shifter is disengaged from the first groove of the adapter so that the adapter is removed from the driving head, wherein when the shifter is not pivoted, the spring is not compressed so that the first end of the shifter is engaged with the first groove of the adapter so that the adapter is secured in the driving head.

2. The wrench as claimed in claim 1, wherein the adapter includes a protrusion formed on the second end thereof, the second groove is defined in the protrusion.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view to show the wrench of the present invention;

(2) FIG. 2 is an exploded view to show the adapter and the driving head of the wrench of the present invention;

(3) FIG. 3 shows a socket is connected to the adapter on the wrench of the present invention;

(4) FIG. 4 is an exploded view to show the socket and the wrench of the present invention;

(5) FIG. 5 is a cross sectional view of the combination disclosed in FIG. 3;

(6) FIG. 6 shows that the wrench is able to be connected with two bolts of different sizes;

(7) FIG. 7 is a perspective view to show the second embodiment of the wrench of the present invention;

(8) FIG. 8 is a cross sectional view to show the second embodiment of the wrench of the present invention;

(9) FIG. 9 is a perspective view to show the third embodiment of the wrench of the present invention;

(10) FIG. 10 is a cross sectional view to show the third embodiment of the wrench of the present invention;

(11) FIG. 11 is a cross sectional view to show the fourth embodiment of the wrench of the present invention, and

(12) FIG. 12 is an exploded view to show the securing unit of wrench of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(13) Referring to FIGS. 1 to 6, the wrench 1 of the present invention comprises a handle and a driving head 11 which has a ratchet ring 2 installed therein. The ratchet ring 2 has a receiving hole 21 which is a polygonal hole so as to be engaged with a bit 20 or a socket 10 therein.

(14) An adapter 3 detachably inserted into the receiving hole 21 and two ends of the adapter 3 are in flush with two sides of the driving head 11. The adapter has a neck 31, an engaging portion 32 and a reception hole 33 which is defined through the neck 31 and the engaging portion 32. A first groove 311 is defined in the outside of the neck 31 which extends from the first end of the engaging portion 32. A second groove 321 is defined in the outside of the second end of the engaging portion 32. Multiple holes 322 are defined through the bottom of the second groove 321 and communicate with the reception hole 33. The engaging portion 32 of the adapter 3 is a polygonal portion which is shaped to be received in the receiving hole 21.

(15) A clip 4 which is a C-lip is engaged with the second groove 321 and partially protrudes beyond the holes 322 and exposed in the reception hole 33. A securing unit 5 is connected to the driving head 11 and secures or releases the adapter 3 relative to the receiving hole 21. The securing unit 5 is removably engaged with the first groove 311 in the receiving hole 21.

(16) It is noted that the reception hole 33 of the adapter 3 is a polygonal hole which is designed to be connected to a bit 20 or a socket 10 that is smaller than the bit 20 or the socket 10 suitable for being connected to the receiving hole 21 of the driving head 11.

(17) The users carry the wrench 1 and the bits 20 and sockets 10 needed, when the larger bits 20 and socket 10 are needed, the adapter 3 is removed from the wrench 1, and the larger bits 20 and socket 10 are directly connected to the receiving hole 21 of the driving head 11. Alternatively, when the smaller bits 20 and socket 10 are to be used, they are connected to reception hole 33 of the adapter 3.

(18) As shown in FIG. 5, a shoulder 34 extends inward and radially from the inner periphery of the reception hole 33 of the adapter 3. The shoulder 34 is located corresponding to the neck 31 so as to stop the bit 20 or the socket 10 in the reception hole 33. In other words, the depth that the bit 20 or the socket 10 that is inserted into the reception hole 33 is restricted. The portion of the clip 4 that exposed from the holes 322 and is located within the reception hole 33 also contacts the spherical portion of the socket 10 to position the socket 10.

(19) As shown in FIGS. 7 and 8, the reception hole 33 of the adapter 3 is shaped and sized to be connected with the bit 20 of smaller size. When the bit 20 is inserted into the reception hole 33 of the adapter 3, the portion of the clip 4 that exposed from the holes 322 and is located within the reception hole 33 is engaged with the notches 201 of the bit 20 to position the bit 20.

(20) As shown in FIGS. 9 and 10, the adapter 3 includes a protrusion 35 formed on the second end thereof, and the second groove 321 is defined in the protrusion 35. This embodiment is designed to be cooperated with a longer bit 20, and the portion of the clip 4 that exposed from the holes 322 and is located within the reception hole 33 is engaged with the notches 201 of the bit 20 to position the bit 20.

(21) As shown in FIG. 11, the embodiment shows that the clip 4 is replaced by a bead 7 which performs the same function as the clip 4.

(22) As shown in FIG. 2, the engaging portion 32 of the adapter 3 has the same shape as the receiving hole 21 so that when the adapter 3 is inserted into the receiving hole 21 and the wrench 1 is rotated, the adapter 3 is rotated with the wrench 1.

(23) As shown in FIG. 12, the securing unit 5 has a shifter 51 and a spring 52. The driving head 11 has a slot 111 in which the shifter 51 is inserted. The first end of the shifter 51 is located beyond the slot 111 and a pin 6 extends through a second end of the shifter 51 and the slot 111 to pivotably connect the shifter 51 to the driving head 11. The driving head 11 has a first recess 12, and the first end of the shifter 51 has a second recess 511 which is located corresponding to the first recess 12. The spring 52 is received between the first and second recesses 12, 511. When pivoting the shifter 51, the spring 52 is compressed and the first end of the shifter 51 is disengaged from the first groove 311 of the adapter 3 so that the adapter 3 is removed from the driving head 11.

(24) When the shifter 51 is not pivoted, the spring 52 is not compressed so that the first end of the shifter 51 is engaged with the first groove 311 of the adapter 3 so that the adapter 3 is secured in the driving head 11.

(25) The wrench 1 is connected to the adapter 3 and able to be cooperated with bits 20 and sockets 10 of different sizes.

(26) While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.