Self-locking screwdriver

Abstract

The utility model discloses a self-locking screwdriver, belongs to the technical field of hardware tools, and aims to overcome the defect that an existing screwdriver head is instable in installation. The screwdriver comprises a screwdriver handle and a screwdriver head, a movable operating part is arranged on the screwdriver handle, a limiting part is arranged on the operating part, a limiting groove is formed in the screwdriver head, and a first elastic part is arranged between the operating part and the screwdriver handle so that the limiting part can be embedded into the limiting groove. The tool bit can be stably installed on the tool handle through the cooperation of the limiting part on the operation part of the tool handle and the limiting groove in the tool bit, the elastic part is arranged between the operation part and the tool handle, and the limiting part can automatically return to be embedded into the limiting groove under the action of the elastic part, so that the installation operation of the tool bit is simple, convenient, labor-saving and stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of hardware tools and relates to a self-locking screwdriver. Background Art

[0002] A screwdriver is a common installation tool in life. An existing screwdriver includes a handle and a plurality of replaceable blade heads to suit screws of different specifications. The blade heads are detachably mounted on the handle. A connecting piece is fixed on the handle. The connecting piece has a slot, and the blade head is inserted into the slot. The blade head is fixed in the slot due to friction between the blade head and the inner wall of the slot. The connection between the blade head and the handle in this fixing method is not stable, and the blade head is easy to fall off the handle. Summary of the invention

[0003] The utility model proposes a self-locking screwdriver in view of the problems existing in the prior art, aiming to overcome the defect that the prior tool head is not firmly installed.

[0004] The utility model is achieved in this way:

[0005] A self-locking screwdriver comprises a handle and a bit, wherein a movable operating member is provided on the handle, a limiting portion is provided on the operating member, a limiting groove is provided on the bit, and a first elastic member is provided between the operating member and the handle so that the limiting portion is embedded in the limiting groove.

[0006] When in use, since the operating member is movable, the user operates the operating member to make the limiting part disengage from the limiting groove, and the cutter head is free from the constraint of the limiting part, so that the cutter head can be taken out from the handle. When installing the cutter head, the cutter head is inserted into the handle so that the limiting groove and the limiting part are aligned, and under the action of the elastic member, the limiting part is embedded in the limiting groove, so that the cutter head is stably fixed on the handle.

[0007] Preferably, the operating member comprises a slider that can move forward and backward, a push button fixed on the slider, and a lifting and lowering locking block, the limiting portion is located on the locking block, one of the slider and the locking block is provided with an inclined opening, and the other is provided with a connecting column that moves along the inclined opening, so that when the push button moves forward, the locking block moves upward. When the push button causes the slider to move forward, the connecting column moves backward relative to the inclined opening, and at the same time causes the locking block connected to the connecting column to move upward, so that the limiting portion located on the locking block is separated from the limiting groove.

[0008] Preferably, the knife handle comprises a handle, a connecting seat and a front cover body, the connecting seat comprises a fixing part fixed in the handle and a control part exposed outside the handle, the front cover body is fixed on the control part, the front cover body has a mounting opening, the push button is embedded in the mounting opening and can slide forward and backward in the mounting opening, the control part is provided with a first slide groove, the slider is embedded in the first slide groove and can move forward and backward in the first slide groove;

[0009] The front section of the slider has a convex column, one end of the first elastic member is sleeved on the convex column and abuts against the slider, the slider has an extension portion extending forward, and the extension portion has a groove, so that the installation of the first elastic member is more stable.

[0010] Preferably, the slider has a sliding portion extending to both sides, the control portion has a sinking platform higher than the bottom of the first slide groove, the sliding portion abuts against the sinking platform and can slide back and forth on the sinking platform, and the width of the slider is greater than the width of the installation opening. This can prevent the slider from detaching from the control portion.

[0011] Preferably, one of the control part and the locking block has a second slide groove extending up and down, and the other has a guide part embedded in the second slide groove, so that the guide part can move up and down along the second slide groove; the control part has a lifting hole extending up and down and penetrating the mounting hole, and the locking block is embedded in the lifting hole and can move up and down along the lifting hole. When the locking block moves up and down in the lifting hole, the guide part moves up and down along the second slide groove, and the guide part and the second slide groove can reduce the friction force of the locking block moving up and down, so that the locking block moves up and down more smoothly.

[0012] Preferably, the first elastic member is a spring, one end of the spring abuts against the slider, and the other end of the spring abuts against the front cover, so that the slider tends to move backward.

[0013] Preferably, the first elastic member is embedded in the first sliding groove, so that the installation of the first elastic member is more stable.

[0014] Preferably, a second elastic member is provided between the cutter head and the handle to enable the cutter head to move forward relative to the handle, so as to facilitate the automatic ejection of the cutter head and the removal of the cutter head, and also to prompt the user that the limiting part has been separated from the limiting groove.

[0015] Preferably, the connecting seat has a mounting hole that passes through from front to back, the cutter head is inserted into the mounting hole, the second elastic member is a spring, one end of the second elastic member abuts against the cutter head, and the other end is fixed to the handle.

[0016] Preferably, the front end surface of the locking block has a guide surface, and the guide surface is tilted backward from top to bottom, so that when the cutter head is inserted into the handle, the cutter head pushes the locking block to move upward. In this way, the cutter head can be inserted into place without pushing the push button, which is convenient for quick installation of the cutter head.

[0017] The utility model provides a self-locking screwdriver, which can stably mount the cutter head on the cutter handle through the cooperation of the limiting part on the cutter handle operating part and the upper limiting groove on the cutter head. Since an elastic part is arranged between the operating part and the cutter handle, the limiting part can automatically return to its original position and embed into the limiting groove under the action of the elastic part, so that the installation operation of the cutter head is simple, convenient, labor-saving and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the screwdriver structure;

[0019] Figure 2 It is a cross-sectional view of the local structure of the screwdriver;

[0020] Figure 3 for Figure 2 A magnified view of the part A in the middle;

[0021] Figure 4 This is a schematic diagram of the exploded structure of a screwdriver;

[0022] Figure 5 This is an exploded view of the local structure of the screwdriver.

[0023] Explanation of the accompanying drawings: 100, knife handle; 110, handle; 111, installation cavity; 120, connecting seat; 121, fixing part; 122, control part; 123, first slide groove; 124, sink; 125, installation hole; 126, second slide groove; 127, lifting hole; 130, front cover; 131, installation opening; 200, knife head; 210, limiting groove; 300, operating member; 310, slider; 311, inclined opening; 312, plug-in hole; 313, boss; 314, extension part; 315, groove; 316, sliding part; 320, push button; 321, rib; 322, installation part; 330, locking block; 331, limiting part; 332, connecting column; 333, guide part; 334, guide surface; 400, first elastic member; 500, second elastic member. DETAILED DESCRIPTION

[0024] The following will further describe the specific implementation of the utility model in combination with the accompanying drawings of the embodiments, so that the technical solution of the utility model is easier to understand and grasp. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0025] like Figure 1-5As shown, a self-locking screwdriver provided in this embodiment includes a handle 100 and a bit 200, wherein a movable operating member 300 is provided on the handle 100, a limiting portion 331 is provided on the operating member 300, a limiting groove 210 is provided on the bit 200, and a first elastic member 400 is provided between the operating member 300 and the handle 100 to allow the limiting portion 331 to be embedded in the limiting groove 210. When in use, since the operating member 300 is movable, the user operates the operating member 300 to disengage the limiting portion 331 from the limiting groove 210, and the bit 200 is disengaged from the constraint of the limiting portion 331, and the bit 200 can be taken out of the handle 100. When installing the cutter head 200 , insert the cutter head 200 into the handle 100 so that the limiting groove 210 and the limiting portion 331 are aligned. Under the action of the elastic member, the limiting portion 331 is embedded in the limiting groove 210 , so that the cutter head 200 is stably fixed on the handle 100 .

[0026] like Figure 3 , 4 As shown, the operating member 300 includes a slider 310 that can move forward and backward, a push button 320 fixed on the slider 310 and a liftable locking block 330, the limiting portion 331 is located on the locking block 330, one of the slider 310 and the locking block 330 is provided with an inclined opening 311, and the other is provided with a connecting column 332 that moves along the inclined opening 311, so that when the push button 320 moves forward, the locking block 330 moves upward. In this embodiment, the inclined opening 311 is located on the slider 310, and the locking block 330 has a connecting column 332, which passes through the inclined opening 311. The inclined opening 311 is inclined backward from bottom to top. When the push button 320 causes the slider 310 to move forward, the connecting column 332 moves backward relative to the inclined opening 311, and at the same time, the locking block 330 connected to the connecting column moves upward, so that the limiting portion 331 on the locking block 330 is separated from the limiting groove 210. Figure 2 In other optional embodiments, the inclined opening 311 may be located on the locking block 330 , and the connecting column 332 may be located on the slider 310 .

[0027] The operating member 300 moves forward and backward so that the limiting portion 331 is embedded in or separated from the limiting groove 210, so that the operating member 300 can be prevented from protruding too much from the handle 100. In other optional embodiments, the operating member 300 can also be a swing member, and the limiting portion 331 is embedded in or separated from the limiting groove 210 by the swing of the operating member 300. The slider 310 and the push button 320 of this embodiment are separate parts fixed to each other. In other optional embodiments, the slider 310 and the push button 320 can also be connected as one piece.

[0028] like Figure 2-4 As shown, the knife handle 100 includes a handle 110, a connection seat 120 and a front cover 130. The handle 110, the connection seat 120 and the front cover 130 can be made of different materials. For example, the connection seat 120 is made of metal materials such as aluminum alloy and stainless steel to improve strength and durability, and the handle 110 can be made of plastic and other materials to reduce costs. The handle 110 can also be attached with rubber and other materials to improve friction. The connection seat 120 includes a fixing portion 121 fixed in the handle 110 and a control portion 122 exposed to the handle 110. The fixing portion 121 is a hexagonal prism to prevent the fixing portion 121 from rotating relative to the handle 110. The front cover body 130 is fixed on the control part 122, and the front cover body 130 has a mounting opening 131. The push button 320 is embedded in the mounting opening 131 and can slide back and forth in the mounting opening 131. The upper surface of the push button 320 has a convex rib 321, which can increase the friction between the hand and the push button 320 and play an anti-slip role. The push button 320 has a mounting portion 322 on the lower surface, and the slider 310 has a plug hole 312. The mounting portion 322 is inserted in the plug hole 312. When the push button 320 is pushed to move, the slider 310 also moves accordingly. The control part 122 is provided with a first slide groove 123, and the slider 310 is embedded in the first slide groove 123 and can move back and forth in the first slide groove 123.

[0029] The first elastic member 400 is a spring, which is embedded in the first slide groove 123. One end of the spring abuts against the slider 310, and the other end abuts against the front cover 130, so that the slider 310 tends to move backward. The front section of the slider 310 has a protrusion 313. One end of the first elastic member 400 is sleeved on the protrusion 313 and abuts against the slider 310, which can make the first elastic member 400 more stable and prevent the first elastic member 400 from shifting. When the slider 310 moves forward, the first elastic member 400 is compressed. When the push button 320 is released, the first elastic member 400 will restore its deformation and push the slider 310 to move backward.

[0030] The slider 310 has a sliding portion 316 extending to both sides, the control portion 122 has a sinking platform 124 higher than the bottom of the first slide groove 123, the sliding portion 316 abuts against the sinking platform 124 and can slide forward and backward on the sinking platform 124, the sinking platform 124 can support the slider 310, the slider 310 has an extension portion 314 extending forward, and the extension portion 314 has a groove 315, the extension portion 314 and the groove 315 can further limit the first elastic member 400 to prevent the first elastic member 400 from shifting. Since the slider 310 has the sliding portion 316 extending to both sides, the width of the slider 310 is greater than the width of the installation opening 131, preventing the slider 310 from detaching from the installation opening 131.

[0031] A second elastic member 500 is provided between the cutter head 200 and the handle 100 to enable the cutter head 200 to move forward relative to the handle 100. The connection seat 120 has a mounting hole 125 extending from front to back, and the cutter head 200 is inserted into the mounting hole 125. The second elastic member 500 is a spring, one end of which abuts against the cutter head 200, and the other end is fixed to the handle 110. The handle 110 has a mounting cavity 111, the fixing portion 121 is inserted and fixed in the mounting cavity 111, and the second elastic member 500 is inserted in the mounting cavity 111, one end of which abuts against the cutter head 200, and the other end abuts against the bottom wall of the mounting cavity 111. When the cutter head 200 is installed in the mounting hole 125 and the limiting portion 331 is embedded in the limiting groove 210, the second elastic member 500 is in a compressed state. When the locking block 330 moves upward and the limiting portion 331 is separated from the limiting groove 210, the second elastic member 500 restores elastic deformation, and the cutter head 200 is ejected, so that the cutter head 200 can be easily taken out. In other optional embodiments, the mounting hole 125 may not be through, one end of the second elastic member 500 is fixed on the rear end wall of the mounting hole 125, and the other end abuts against the cutter head 200.

[0032] One of the control part 122 and the locking block 330 has a second slide groove 126 extending up and down, and the other has a guide part 333 embedded in the second slide groove 126, so that the guide part 333 can move up and down along the second slide groove 126. Figure 2-5As shown, in this embodiment, the second slide groove 126 is located on the control part 122, the guide part 333 is located on the locking block 330, and the guide part 333 is embedded in the second slide groove 126. The control part 122 has a lifting hole 127 extending up and down and penetrating the mounting hole 125. The locking block 330 is embedded in the lifting hole 127 and can move up and down along the lifting hole 127. When the locking block 330 moves up and down in the lifting hole 127, the guide part 333 moves up and down along the second slide groove 126. The guide part 333 and the second slide groove 126 can reduce the friction force of the locking block 330 moving up and down, so that the locking block 330 moves up and down more smoothly. In other optional embodiments, the second slide groove 126 can be located on the locking block 330, and the guide part 333 is located on the control part 122.

[0033] The front end surface of the locking block 330 has a guide surface 334, and the guide surface 334 is tilted backward from top to bottom, so that when the cutter head 200 is inserted into the handle 100, the cutter head 200 pushes the locking block 330 to move upward. When installing the cutter head 200, there is no need to push the push button 320. The locking block 330 can be moved upward by inserting the cutter head 200 into the handle 100 with force. Since the operating member 300 has a tendency to move back under the action of the first elastic member 400, when the limiting groove 210 on the cutter head 200 corresponds to the limiting portion 331, the limiting portion 331 will automatically embed into the limiting groove 210, and the cutter head 200 can be quickly, conveniently and stably installed on the handle 100.

[0034] The cutter head 200 can be easily disassembled and assembled, and the screwdriver can be equipped with different types of cutter heads 200. For example, the cutter head 200 can be a flat head, a cross head, an internal hexagon head, an external hexagon head, etc. The various cutter heads 200 can also be of the same type but different sizes, making the screwdriver more applicable to a wider range of scenarios.

Claims

1. A self-locking screwdriver, comprising a handle (100) and a cutter head (200), characterized in that: A movable operating member (300) is provided on the knife handle (100), a limiting portion (331) is provided on the operating member (300), a limiting groove (210) is provided on the knife head (200), and a first elastic member (400) is provided between the operating member (300) and the knife handle (100) so that the limiting portion (331) is embedded in the limiting groove (210).

2. A self-locking screwdriver according to claim 1, characterized in that: The operating member (300) comprises a slider (310) that can move forward and backward, a push button (320) fixed on the slider (310), and a lifting and lowering locking block (330); the limiting portion (331) is located on the locking block (330); one of the slider (310) and the locking block (330) is provided with an inclined opening (311); the other is provided with a connecting column (332) that moves along the inclined opening (311), so that when the push button (320) moves forward, the locking block (330) moves upward.

3. A self-locking screwdriver according to claim 2, characterized in that: The knife handle (100) comprises a handle (110), a connecting seat (120) and a front cover (130); the connecting seat (120) comprises a fixing portion (121) fixed inside the handle (110) and a control portion (122) exposed outside the handle (110); the front cover (130) is fixed on the control portion (122); the front cover (130) has a mounting opening (131); the push button (320) is embedded in the mounting opening (131) and can slide forward and backward in the mounting opening (131); the control portion (122) is provided with a first sliding groove (123); the sliding block (310) is embedded in the first sliding groove (123) and can move forward and backward in the first sliding groove (123); The front section of the slider (310) has a convex column (313), one end of the first elastic member (400) is sleeved on the convex column (313) and abuts against the slider (310), the slider (310) has an extension portion (314) extending forward, and the extension portion (314) has a groove (315).

4. A self-locking screwdriver according to claim 3, characterized in that: The slider (310) has a sliding portion (316) extending to both sides, the control portion (122) has a sink (124) higher than the bottom of the first slide groove (123), the sliding portion (316) abuts against the sink (124) and can slide back and forth on the sink (124), and the width of the slider (310) is greater than the width of the installation opening (131).

5. A self-locking screwdriver according to claim 3, characterized in that: The first elastic member (400) is a spring, one end of which abuts against the slider (310), and the other end of which abuts against the front cover (130), so that the slider (310) tends to move backward.

6. A self-locking screwdriver according to claim 3, characterized in that: The first elastic member (400) is embedded in the first sliding groove (123).

7. A self-locking screwdriver according to claim 3, characterized in that: A second elastic member (500) is provided between the cutter head (200) and the cutter handle (100) so as to enable the cutter head (200) to move forward relative to the cutter handle (100).

8. A self-locking screwdriver according to claim 7, characterized in that: The connecting seat (120) has a mounting hole (125) that passes through from front to back, and the cutter head (200) is inserted into the mounting hole (125). The second elastic member (500) is a spring, and one end of the second elastic member (500) abuts against the cutter head (200), and the other end is fixed to the handle (110).

9. A self-locking screwdriver according to claim 8, characterized in that: One of the control part (122) and the locking block (330) has a second slide groove (126) extending up and down, and the other has a guide part (333) embedded in the second slide groove (126) so that the guide part (333) can move up and down along the second slide groove (126); the control part (122) has a lifting hole (127) extending up and down and communicating with the mounting hole (125), and the locking block (330) is embedded in the lifting hole (127) and can move up and down along the lifting hole (127).

10. The self-locking screwdriver according to claim 2, characterized in that: The front end surface of the locking block (330) has a guide surface (334), and the guide surface (334) is inclined backward from top to bottom, so that when the tool head (200) is inserted into the tool handle (100), the tool head (200) pushes the locking block (330) to move upward.

Images