Multifunctional electric screwdriver

Abstract

The invention relates to the technical field of screwdrivers, and discloses a multifunctional electric screwdriver which comprises a shell, a gyroscope and a pressure sensor which are arranged in the shell, a rotating shaft arranged at the bottom of the shell, a screwdriver blade arranged on one side of the rotating shaft and a telescopic unit arranged at the bottom of the rotating shaft. The telescopic unit comprises an adjusting telescopic assembly arranged in the rotating shaft and a clamping assembly arranged in the adjusting telescopic assembly, the adjusting telescopic assembly is used for adjusting the telescopic screwdriver blade, and the clamping assembly is used for clamping the screwdriver blade. The length of the screwdriver head can be adjusted through the telescopic unit, the screwdriver can adapt to various working conditions of deep holes, narrow grooves, protruding structures and the like, the replacement frequency of the screwdriver head is reduced, and the use cost is reduced. Through cooperation of a rotary knob, a clamping groove, a clamping block, a reset spring, a limiting rod and a limiting groove, single-hand quick unlocking, adjustment and automatic locking are achieved, adjustment is stable and does not move, operation is easy and convenient, positioning is accurate, and the use efficiency and reliability are greatly improved.

Description

A multi-functional electric screwdriver Technical Field

[0001] This invention relates to the field of screwdriver technology, and more particularly to a multi-functional electric screwdriver. Background Technology

[0002] Electric screwdrivers are commonly used assembly tools in the assembly of home appliances, digital products, and machinery. Traditional electric screwdrivers typically only have basic rotation and tightening functions. During use, they rely heavily on the operator's experience to control the tightening force and bit angle, which can easily lead to problems such as screws being driven in at an angle, stripping threads, misaligned screws, or excessive tightening force damaging the workpiece, or insufficient tightening force causing loose connections. They are difficult to achieve precise, controllable, and traceable tightening operations, resulting in poor assembly stability and safety.

[0003] Meanwhile, most existing electric screwdrivers have fixed-length screwdriver bits, requiring users to change the bit length according to different working conditions such as deep holes, narrow slots, and protruding structures. This is not only cumbersome and inefficient, but also necessitates carrying multiple bit sizes, increasing usage costs and carrying burden. Some electric screwdrivers with adjustment functions suffer from problems such as insufficient stability of the adjustment mechanism, susceptibility to mis-adjustment due to vibration, and easy loosening and slippage of the bit. Furthermore, the adjustment operation is complex and cannot achieve quick one-handed adjustment or automatic locking.

[0004] Furthermore, existing screwdriver bit clamping structures generally suffer from drawbacks such as inconvenient assembly and disassembly, low positioning accuracy, and poor clamping reliability. Some structures are also prone to component interference, jamming, and wear, affecting overall service life and user experience. Therefore, developing a multi-functional electric screwdriver with angle and pressure monitoring, adjustable screwdriver bit length, stable and reliable adjustment, and fast and secure clamping to solve the many shortcomings of existing technologies has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] In view of the problems of existing technology, such as difficulty in controlling the angle and tightening force, non-adjustable cutting head length, easy accidental adjustment, and inconvenient clamping, a multi-functional electric screwdriver is proposed.

[0006] Its purpose is to achieve intelligent detection of angle and pressure, quick adjustment and automatic locking of the cutter head length with one hand, fast and reliable clamping of the cutter head, improve assembly accuracy, stability and ease of use, and adapt to various working conditions.

[0007] The technical solution of this invention is a multifunctional electric screwdriver, including a housing, a gyroscope and a pressure sensor disposed within the housing, a rotating shaft disposed at the bottom of the housing, a screwdriver head disposed on one side of the rotating shaft, and a telescopic unit disposed at the bottom of the rotating shaft; the telescopic unit includes an adjusting telescopic component disposed inside the rotating shaft, and a clamping component disposed within the adjusting telescopic component, the adjusting telescopic component being used to adjust the telescopic screwdriver head, and the clamping component being used to clamp the screwdriver head; the adjusting telescopic component includes a movable cavity originating inside the rotating shaft, a movable cylinder disposed within the movable cavity, a threaded groove formed on the outer side of the movable cylinder, an adjusting ring disposed on the movable cylinder, an adjusting block disposed inside the adjusting ring, the adjusting block being slidably connected within the threaded groove, and a knob disposed at the end of the rotating shaft, the adjusting ring being slidably connected within the knob for limiting.

[0008] Furthermore, the adjustable telescopic assembly also includes a number of slots arranged in a ring array at the end of the rotating shaft, and a number of locking blocks disposed inside the knob, the locking blocks being engaged in the slots.

[0009] Furthermore, a rotating plate is also provided on one side of the knob for limiting the rotation, and a return spring is provided on one side of the rotating plate, with one end of the return spring fixedly connected to the rotating shaft.

[0010] Furthermore, the movable cavity is symmetrically provided with limiting rods, and the movable cylinder is correspondingly provided with limiting grooves, in which the limiting rods slide within the limiting grooves.

[0011] Furthermore, the clamping assembly includes two contraction grooves symmetrically opened inside the movable cylinder, a clamping spring disposed in the contraction groove, a clamping block disposed on one side of the clamping spring, and two positioning grooves correspondingly opened at the end of the screwdriver head, with the clamping block abutting against the positioning groove.

[0012] Furthermore, the clamping block has inclined surfaces on both sides, and one side of the inclined surface does not extend out of the shrinkage groove.

[0013] Furthermore, the knob also has a moving groove inside for the adjustment ring to move.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting a gyroscope and a pressure sensor in the housing, the present application can detect the attitude angle and tightening pressure of the screwdriver in real time, effectively avoiding the screw being tilted, stripped, or misaligned, while preventing the workpiece from being damaged by excessive tightening force or loosened due to insufficient tightening force, thus realizing controllable, quantifiable, and traceable tightening operations, and significantly improving assembly stability, safety, and assembly accuracy.

[0015] 2. The screwdriver bit length is adjustable via a telescopic unit, adapting to various working conditions such as deep holes, narrow slots, and protruding structures, reducing the frequency of bit replacement and lowering operating costs. Through the coordination of a knob, slot, locking block, return spring, limit rod, and limit groove, it enables quick one-handed unlocking, adjustment, and automatic locking. Adjustment is stable and prevents movement, making operation simple and positioning precise, significantly improving efficiency and reliability.

[0016] 3. The clamping assembly enables quick clamping and secure positioning of the screwdriver bit. The beveled structure of the clamping block makes bit loading and unloading smoother, and the clamping block does not protrude from the shrinkage groove, avoiding interference with other components. The moving groove inside the knob provides room for the adjustment ring to move, ensuring stable transmission. The overall structure is compact, operates smoothly, has a longer service life, and is more practical. Attached Figure Description

[0017] Figure 1 is a three-dimensional structural diagram of the present invention; Figure 2 is a structural diagram of the end of the present invention; Figure 3 is a cross-sectional structural diagram of the end of the present invention; Figure 4 is an enlarged structural diagram of point A in Figure 3 of the present invention; Figure 5 is an exploded structural diagram of the telescopic unit of the present invention; Figure 6 is a cross-sectional structural diagram of the knob and the moving cylinder of the present invention; Figure 7 is an exploded structural diagram of the knob and the rotating shaft of the present invention after cross-section; Figure 8 is a structural diagram of the clamping assembly of the present invention.

[0018] In the diagram: 1. Housing; 11. Rotating shaft; 12. Screwdriver head; 2. Adjustable telescopic assembly; 21. Moving cavity; 22. Moving cylinder; 23. Threaded groove; 24. Adjusting ring; 25. Adjusting block; 26. Knob; 27. Slot; 28. Slot; 3. Rotating plate; 4. Return spring; 5. Limiting rod; 6. Limiting groove; 7. Clamping assembly; 71. Contraction groove; 72. Clamping spring; 73. Clamping block; 74. Positioning groove; 75. Inclined surface; 8. Moving groove. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Example 1, referring to Figures 1-8, is the first embodiment of the present invention, providing a multifunctional electric screwdriver, including a housing 1, a gyroscope and a pressure sensor disposed within the housing 1, a rotating shaft 11 disposed at the bottom of the housing 1, one end of the rotating shaft 11 connected to the output shaft of a motor, the motor being built into the housing 1, a screwdriver head 12 mounted on one side of the rotating shaft 11, and a telescopic unit disposed at the bottom of the rotating shaft 11; the telescopic unit includes an adjusting telescopic component 2 disposed within the rotating shaft 11, and a clamping component 7 disposed within the adjusting telescopic component 2, for adjusting... The telescopic assembly 2 is used to adjust the telescopic screwdriver head 12, and the clamping assembly 7 is used to clamp the screwdriver head 12. The telescopic adjustment assembly 2 includes a movable cavity 21 that starts inside the rotating shaft 11, a movable cylinder 22 that is slidably connected inside the movable cavity 21, a threaded groove 23 that is opened on the outside of the movable cylinder 22, an adjusting ring 24 that is rotatably connected to the movable cylinder 22, an adjusting block 25 that is fixedly connected to the inside of the adjusting ring 24, the adjusting block 25 that is slidably connected in the threaded groove 23, and a knob 26 that is rotatably connected to the end of the rotating shaft 11, the adjusting ring 24 that is limited and slidably connected inside the knob 26.

[0021] Specifically, during use, a gyroscope is used to measure the screwdriver angle, preventing screws from being tilted, stripped, or misaligned. A pressure sensor measures the tightening pressure and provides real-time feedback, avoiding damage to screws and workpieces due to excessive force or loosening due to insufficient force. This achieves controllable, quantifiable, and traceable tightening operations, improving assembly stability and safety. Existing screwdriver heads 12 are generally of fixed length; during installation, the required length of the screwdriver head 12 is directly snapped into the screwdriver, without any length adjustment. This invention addresses this issue by... The telescopic unit allows for length adjustment of the fixed screwdriver head 12 to adapt to various working conditions. During adjustment, rotating the knob 26 rotates the adjusting ring 24, which in turn rotates the inner adjusting block 25. The adjusting block 25 moves within the threaded groove 23. Due to the limiting position within the moving cylinder 22, the movement of the adjusting block 25 within the threaded groove 23 drives the moving cylinder 22 to move back and forth. Since the screwdriver head 12 is fixed within the moving cylinder 22, it moves back and forth accordingly, thus achieving length adjustment. The screwdriver head can be freely extended and retracted according to different working conditions such as deep holes, narrow grooves, and protruding structures, adapting to multiple scenarios with a single machine. This reduces the frequency of changing screwdriver heads, improves work efficiency, eliminates the need to carry multiple sizes of screwdriver heads, reduces tool costs and carrying burden, and solves the pain point of traditional electric screwdriver heads having fixed and unadjustable lengths.

[0022] Referring to Figures 6-7, the adjustable telescopic assembly 2 also includes a number of slots 27 arranged in a ring array at the end of the rotating shaft 11, and a number of locking blocks 28 fixedly connected inside the knob 26, with the locking blocks 28 engaging in the slots 27.

[0023] Specifically, to adjust the length, first push the knob 26 forward, causing the locking block 28 inside the knob 26 to disengage from the slot 27. Then, rotate the knob 26 to adjust the length of the screwdriver head 12. Pushing the knob 26 enables three-stage operation: unlocking, adjusting, and resetting / locking. This prevents accidental rotation that could cause unexpected changes in the head length, improving operational stability. The annular array of slots 27 and locking blocks 28 works together to form a circumferential limit during tightening, preventing the head from extending, retracting, or loosening due to vibration or force, ensuring operational accuracy and safety, and effectively preventing the head length from shifting during operation. Furthermore, the entire process of unlocking, adjusting, and locking can be completed with one hand: push the knob 26 forward to unlock, rotate to adjust, and release to reset and lock. This continuous one-handed operation eliminates the need to change tools or use both hands, significantly improving the efficiency of disassembly, assembly, and deep-hole work. In addition, the multi-level uniform positioning and clear adjustment feel, the ring array slot 27 can realize multi-level and equal spacing length adjustment, and users can clearly feel the gear changes. The adjustment is precise, without slipping or spinning.

[0024] Referring to Figures 2-5, a rotating plate 3 is also connected to one side of the knob 26 for limiting rotation, and a return spring 4 is fixedly connected to one side of the rotating plate 3. One end of the return spring 4 is fixedly connected to the rotating shaft 11.

[0025] Specifically, the knob 26 automatically resets, eliminating the need for manual repositioning. After adjustment, the knob 26 automatically springs back and locks under the action of the return spring 4, and the locking block 28 automatically re-engages with the locking slot 27, saving the need for manual reset and improving ease of use. It maintains a locked state under normal conditions to prevent accidental adjustment. The return spring 4 always provides a reset force, keeping the knob 26 locked in place when not adjusting, preventing the knob 26 from loosening or the blade length from unexpectedly changing due to accidental touch or vibration during operation.

[0026] Referring to Figures 5 and 6, a limiting rod 5 is symmetrically fixedly connected inside the movable cavity 21, and a limiting groove 6 is correspondingly opened inside the movable cylinder 22, in which the limiting rod 5 is slidably connected.

[0027] Specifically, the limiting rod 5 and the limiting groove 6 slide together, which can effectively limit the circumferential rotation of the moving cylinder 22, ensuring that the cutter head does not slip, spin freely, or deviate during tightening operations, and the power transmission is more direct and efficient. The symmetrically arranged limiting rod 5 and limiting groove 6 form a double guide structure, which enables the moving cylinder 22 to move stably along a straight line during the extension and retraction process, avoiding eccentricity, jamming, or radial sway, and improving adjustment accuracy and reliability.

[0028] Example 2, referring to Figures 4-8, is the second embodiment of the present invention. This embodiment differs from the first embodiment in that: the clamping assembly 7 includes two contraction grooves 71 symmetrically opened inside the movable cylinder 22, a clamping spring 72 fixedly connected in the contraction grooves 71, a clamping block 73 fixedly connected to one side of the clamping spring 72, and two positioning grooves 74 correspondingly opened at the end of the screwdriver head 12, with the clamping block 73 abutting against the positioning grooves 74.

[0029] Specifically, when installing the screwdriver head 12, the end of the screwdriver head 12 is inserted into the moving cylinder 22. During the insertion process, the screwdriver head 12 presses against the clamping blocks 73 on both sides, causing the clamping blocks 73 to compress the clamping spring 72 in the shrinkage groove 71. After the screwdriver head 12 is inserted into place, the clamping spring 72 returns to its original position, pushing the clamping block 73 into the corresponding positioning groove 74 at the end of the screwdriver head 12, thus achieving quick clamping and fixing of the screwdriver head 12. When removing the screwdriver head 12, simply pull the screwdriver head 12 outward with force. The external force overcomes the elasticity of the clamping spring 72, causing the clamping block 73 to disengage from the positioning groove 74, making it easy to remove the screwdriver head 12. The operation is convenient and efficient. Secure clamping, precise positioning, and guaranteed operational stability: Two symmetrically arranged clamping blocks 73 precisely engage with the positioning groove 74 of the screwdriver head 12. Under the elastic force of the clamping spring 72, the clamping blocks 73 tightly abut against the positioning groove 74, achieving bidirectional positioning and clamping of the screwdriver head 12. This effectively prevents the screwdriver head 12 from loosening, shifting, slipping, or falling off during extension, adjustment, and tightening operations, ensuring stable power transmission and improving assembly accuracy.

[0030] Referring to Figure 6, the clamping block 73 has inclined surfaces 75 on both sides, and one side of the inclined surface 75 does not extend out of the shrinkage groove 71.

[0031] Specifically, the clamping block 73 has inclined surfaces 75 on both sides. During the insertion or removal of the screwdriver head 12, the inclined surfaces 75 cooperate with the end of the screwdriver head 12 to form a guide, which facilitates the smooth insertion or removal of the screwdriver head 12 and enables quick installation and removal of the screwdriver head. At the same time, one side of the inclined surface 75 of the clamping block 73 does not extend out of the shrinkage groove 71, so that when the clamping block 73 moves in and out of the shrinkage groove 71, it will not interfere with, scratch or jam with the external cavity or other parts.

[0032] Referring to Figure 7, the knob 26 also has a moving groove 8 for the adjustment ring 24 to move.

[0033] Specifically, the adjusting ring 24 is located within the movable groove 8 and can move axially and rotate circumferentially within it, achieving a movable connection and limiting fit between the adjusting ring 24 and the knob 26. This provides space for the adjusting ring 24 to move smoothly without structural interference during the processes of pushing to unlock, rotating to adjust, and resetting to lock the knob 26. It also ensures reliable limiting between the adjusting ring 24 and the knob 26, preventing radial offset, wobbling, or disengagement of the adjusting ring 24 during adjustment, thus ensuring stable transmission. The remaining structure is the same as in Embodiment 1.

[0034] Based on embodiments 1-2, the working principle of this invention is as follows: When the multi-functional electric screwdriver of this invention is working, the gyroscope inside the housing 1 detects the screwdriver bit's posture angle in real time to prevent the screw from being tilted, stripped, or misaligned during tightening. Combined with a pressure sensor, it monitors the tightening pressure in real time to prevent excessive tightening force from damaging the workpiece or insufficient force from causing loosening, thus achieving precise, controllable, and stable tightening operations. The screwdriver bit length is adjusted via a telescopic unit at the bottom of the rotating shaft 11. When the knob 26 is rotated, the knob 26 drives the internal adjusting ring 24 to rotate synchronously. The adjusting block 25 on the adjusting ring 24 moves along the threaded groove 23 on the outer side of the moving cylinder 22. Under the circumferential limiting action of the limiting rod 5 and the limiting groove 6, the moving cylinder 22 is driven to perform linear telescopic motion along the moving cavity 21, thereby causing the screwdriver bit 12 to extend and retract, meeting the needs of different working conditions such as deep holes and narrow grooves. Before adjustment, push the knob 26 forward to unlock the locking block 28 by disengaging it from the slot 27 on the rotating shaft 11. After adjustment, release the knob 26. Under the action of the return spring 4 and the rotating plate 3, the knob 26 automatically resets, and the locking block 28 re-engages into the slot 27 to lock, preventing accidental changes in the length of the screwdriver bit during operation. The screwdriver bit 12 is quickly clamped by the clamping assembly 7. When inserted, the tip of the screwdriver bit presses against the inclined surfaces 75 on both sides of the clamping block 73, causing the clamping block 73 to compress the clamping spring 72 and retract into the shrinkage groove 71. After reaching the desired position, the clamping block 73 automatically engages with the screwdriver bit positioning groove 74 under the action of the spring, completing a secure clamping. When pulling out, the screwdriver bit can be removed by overcoming the spring force. The clamping block 73 does not protrude from the shrinkage groove 71 to avoid interference with surrounding structures. The adjusting ring 24 moves within the moving groove 8 of the knob 26, ensuring smooth and stable adjustment. The overall structure is compact, easy to operate, precise in adjustment, and reliable in clamping.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A multifunctional electric screwdriver, comprising a housing (1), a gyroscope and a pressure sensor disposed within the housing (1), a rotating shaft (11) disposed at the bottom of the housing (1), and a screwdriver head (12) disposed on one side of the rotating shaft (11), characterized in that, It also includes a telescopic unit located at the bottom of the rotating shaft (11); the telescopic unit includes an adjusting telescopic assembly (2) located inside the rotating shaft (11) and a clamping assembly (7) located inside the adjusting telescopic assembly (2), the adjusting telescopic assembly (2) is used to adjust the telescopic screwdriver head (12), and the clamping assembly (7) is used to clamp the screwdriver head (12); the adjusting telescopic assembly (2) includes a movable cavity (21) located inside the rotating shaft (11), a movable cylinder (22) located inside the movable cavity (21), a threaded groove (23) located outside the movable cylinder (22), an adjusting ring (24) located on the movable cylinder (22), an adjusting block (25) located inside the adjusting ring (24), the adjusting block (25) being slidably connected in the threaded groove (23), and a knob (26) located at the end of the rotating shaft (11), the adjusting ring (24) being slidably connected within the knob (26).

2. The multi-functional electric screwdriver according to claim 1, characterized in that: The adjustable telescopic assembly (2) also includes a number of slots (27) arranged in a ring array at the end of the rotating shaft (11), and a number of locking blocks (28) set inside the knob (26), the locking blocks (28) being engaged in the slots (27).

3. The multi-functional electric screwdriver according to claim 2, characterized in that: A rotating plate (3) is also provided on one side of the knob (26), and a reset spring (4) is provided on one side of the rotating plate (3). One end of the reset spring (4) is fixedly connected to the rotating shaft (11).

4. The multi-functional electric screwdriver according to claim 3, characterized in that: The movable cavity (21) is also symmetrically provided with limiting rods (5), and the movable cylinder (22) is correspondingly provided with limiting grooves (6), and the limiting rods (5) are slidably connected in the limiting grooves (6).

5. The multi-functional electric screwdriver according to claim 1, characterized in that: The clamping assembly (7) includes two contraction grooves (71) symmetrically opened inside the movable cylinder (22), a clamping spring (72) opened in the contraction groove (71), a clamping block (73) opened on one side of the clamping spring (72), and two positioning grooves (74) corresponding to the end of the screwdriver head (12), with the clamping block (73) abutting against the positioning groove (74).

6. The multi-functional electric screwdriver according to claim 5, characterized in that: The clamping block (73) has inclined surfaces (75) on both sides, and one side of the inclined surface (75) does not extend out of the shrinkage groove (71).

7. The multi-functional electric screwdriver according to claim 1, characterized in that: The knob (26) also has a moving groove (8) for the adjustment ring (24) to move inside.

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