Straight screwdriver bit

Abstract

The invention relates to the technical field of screwdriver bits, and discloses a slotted screwdriver bit which comprises a tool bit, the tool bit comprises a tool tube and a cutting edge located in the tool tube, the tool tube is provided with a central axis, one end of the tool tube is open, and the cutting edge of the cutting edge faces the open end of the tool tube. The end face of the cutting edge end of the cutting edge is formed by four evenly and symmetrically arranged transition inclined faces, each transition inclined face inclines inwards from the outer edge in the length direction of the cutting edge and faces the opening end of the knife tube, the four transition inclined faces intersect at one point to form a knife point, and the knife point is located on the central axis. The technical problems that in the prior art, screw locking efficiency is low, and safety is not high are solved.

Description

Technical Field

[0001] This invention relates to the field of bit technology, and more particularly to a flathead bit. Background Technology

[0002] Slotted head screws are suitable for low-speed, large-size screw applications. During the fastening process, a slotted bit is required. Compared to Phillips head screws, automated fastening is more difficult, primarily due to the following challenges: The slotted head has a straight groove, and the bit must be parallel to this groove. Depending on the groove width, the tolerable angular deviation is only ±2°. Exceeding this threshold can cause the bit to slip on the end face or damage the groove. Therefore, high positioning accuracy is required, often necessitating a vision system or guiding mechanism for real-time calibration. During screwing, slight deviations caused by interaction forces or external forces can lead to misalignment between the screw shaft and the hole shaft, preventing screwing in. Real-time compensation for dynamic deviations is necessary. Furthermore, the bit sliding along the slot can scratch surrounding components, causing product quality issues.

[0003] Therefore, a single-stroke bit is urgently needed to solve the above problems. Summary of the Invention

[0004] Based on the above, the purpose of this invention is to provide a flathead screwdriver bit that solves the technical problems of low screw fastening efficiency and low safety in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A flathead screwdriver bit includes a blade head comprising a blade tube and a cutting edge located within the blade tube. The blade tube has a central axis and is open at one end. The cutting edge of the cutting edge faces the open end of the blade tube. The end face of the cutting edge is formed by four uniformly and symmetrically arranged transition slopes along the length of the cutting edge and towards the open end of the blade tube. Each transition slope slopes inward from its outer edge, and the four transition slopes converge at a point to form a blade tip located on the central axis.

[0007] As a preferred embodiment of a flathead screwdriver, the open end of the blade tube has multiple notches spaced apart circumferentially, and an elastic spring is formed between each two adjacent notches.

[0008] As a preferred option for a flathead screwdriver, the multiple stacks are evenly spaced.

[0009] As a preferred embodiment of a flathead screwdriver bit, the cutting edge has two opposing narrow sides and two opposing wide sides, the width of the narrow sides being less than the width of the wide sides, the two narrow sides being fixed to the inner wall of the blade tube, and the thickness of the cutting edge formed between the two wide sides gradually decreasing towards the open end in the length direction of the cutting edge.

[0010] As a preferred embodiment of a flathead screwdriver bit, the wall thickness of the peripheral wall of the screwdriver tube gradually decreases along the direction towards the open end in the length direction of the screwdriver tube.

[0011] As a preferred embodiment of a flathead screwdriver bit, the outer wall surface of the screwdriver tube is inclined in the direction toward the open end along the length of the tube.

[0012] As a preferred embodiment of a flathead screwdriver, the blade tube is cylindrical.

[0013] As a preferred embodiment of a flathead screwdriver bit, it also includes a shank connected to the end of the blade tube opposite to the open end.

[0014] As a preferred embodiment of a flathead screwdriver bit, it also includes a shank, which is connected to the end of the shank opposite to the bit.

[0015] As a preferred embodiment of a flathead screwdriver bit, the cutting edge and the shank are integrally formed, or the cutting edge and the shank are integrally formed.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention provides a flathead screwdriver bit. By placing the cutting edge inside the screwdriver tube, when aligning with the screw head, simply insert the screw head into the open end of the screwdriver tube, ensuring that the cutting edge and screw head are roughly aligned. The cutting tip is formed by four evenly distributed transition slopes. When the screw head and cutting edge are initially aligned, the cutting tip remains within the slotted groove of the screw head. Simply rotating the screw or the bit causes the cutting edge and screw head to rotate relative to each other. During rotation, the cutting edge slides along the transition slopes into the slotted groove of the screw head. The maximum rotation angle does not exceed 360° to achieve locking between the cutting edge and the screw, resulting in high efficiency. Furthermore, the evenly and symmetrically distributed transition slopes ensure high efficiency and consistency in locking in both directions. Simultaneously, during alignment, because the cutting tip remains within the slotted groove and the screwdriver tube provides limiting protection, relative slippage between the cutting tip and the screw effectively prevents damage to surrounding structures or personnel, ensuring high operational safety. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a flathead screwdriver bit and a screw before they are aligned, provided by an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a flathead screwdriver bit and a screw before alignment, provided by an embodiment of the present invention from another perspective;

[0021] Figure 3 This is a schematic diagram of the structure after the flathead screwdriver bit and the screw are aligned, as provided in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the blade structure provided in an embodiment of the present invention;

[0023] Figure 5 This is a cross-sectional view of a flathead screwdriver bit and a screw aligned from one perspective, provided in an embodiment of the present invention.

[0024] Figure 6 This is a cross-sectional view of the flathead screwdriver bit and screw aligned from another perspective, provided by an embodiment of the present invention.

[0025] In the picture:

[0026] 1. Blade head; 11. Blade tube; 110. Collar; 111. Elastic spring; 12. Blade edge; 121. Transition bevel; 122. Blade tip; 2. Blade shank; 3. Blade handle; 4. Screw; 40. Slotted groove. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0028] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are merely used for descriptive distinction and have no special meaning.

[0031] like Figures 1 to 6As shown, this embodiment of the invention provides a flathead screwdriver bit that can be mounted on an electric screwdriver or a screwdriver at the end of a robotic arm. Specifically, the flathead screwdriver bit includes a blade head 1, which includes a blade tube 11 and a cutting edge 12 located within the blade tube 11. The blade tube 11 has a central axis and one end is open. The cutting edge of the cutting edge 12 faces the open end of the blade tube 11. The end face of the cutting edge 12 is formed by four uniformly and symmetrically arranged transition slopes 121 along the length of the cutting edge 12 and towards the open end of the blade tube 11. Each transition slope 121 slopes inward from its outer edge, and the four transition slopes 121 converge at a point to form a blade tip 122, which is located on the central axis. That is, each transition slope 121 forms a non-180° angle with another transition slope 121 in two perpendicular directions, and the blade tip 122 is located at the most prominent point of the cutting edge 12. By placing the cutting edge 12 inside the cutting tube 11, when aligning it with the head of the screw 4, it is only necessary to insert the head of the screw 4 into the open end of the cutting tube 11, so that the cutting edge 12 and the head of the screw 4 are roughly aligned in relative position. Furthermore, the cutting tip 122 is formed by four evenly and symmetrically distributed transition slopes 121. When the head of the screw 4 and the cutting edge 12 are initially aligned, the cutting tip 122 is always located within the slotted groove 40 of the head of the screw 4. Simply rotating the cutting head 1 or the screw 4 causes the cutting edge 12 and the head of the screw 4 to rotate relative to each other. During this rotation, the cutting edge 12... The cutting edge 12 slides along the transition slope 121 into the slotted groove 40 on the head of the screw 4. The maximum rotation angle does not exceed 360° to achieve locking between the cutting edge 12 and the screw 4, resulting in high efficiency. Furthermore, the uniformly distributed design of the transition slope 121 ensures efficient and consistent locking in both directions. During alignment, the cutting tip 122 remains within the slotted groove 40, and the limiting protection provided by the cutting tube 11 effectively prevents relative slippage between the cutting head 1 and the screw 4, thus avoiding damage to surrounding structures or personnel, ensuring high operational safety. This flathead screwdriver bit has a simple structure, is relatively easy to design and manufacture, and has a low cost. It replaces high-cost auxiliary counterweight equipment at a low cost, solving the problem of fast and safe locking of flathead screws 4.

[0032] The blade tube 11 is preferably cylindrical, suitable for the widely used round-head screws 4. Of course, in other embodiments, the blade tube 11 can also be other shapes, such as square tubes, depending on the actual needs.

[0033] More specifically, the flathead screwdriver bit also includes a shank 2, which is connected to one end of the screwdriver tube 11 away from the opening end. The shank 2 serves as an extension rod of the screwdriver head 1 for easy operation. The material and shape of the shank 2 can be set according to actual needs, for example, the same as a regular flathead screwdriver bit.

[0034] More specifically, the flathead screwdriver bit also includes a handle 3, which is connected to the end of the shank 2 opposite to the screw head 1. The handle 3 is connected to a locking tool, such as an electric screwdriver or a screwdriver end effector for a robotic arm; it can also serve as a manual operating part. The material and shape of the handle 3 can be set according to actual needs, for example, the same as a regular flathead screwdriver bit.

[0035] Optionally, the blade 12 and the shank 2 are integrally formed, or the blade 12 and the tube 11 are integrally formed, for example, the blade 12 and the tube 11 are integrally formed, and the tube 11 is welded to the shank 2.

[0036] Furthermore, such as Figure 1 , Figure 5 and Figure 6 As shown, the blade 12 has two opposing narrow sides and two opposing wide sides. The width of the narrow sides is smaller than the width of the wide sides. The two narrow sides are fixed to the inner wall of the blade tube 11. Along the length of the blade 12, the thickness of the blade 12 formed between the two wide sides gradually decreases towards the open end. That is, the two wide sides are symmetrical arc-shaped bevels. The two opposing narrow sides of the blade 12 are fixed to the inner wall of the blade tube 11, ensuring the stability of the blade 12 in the blade tube 11 and its stability and reliability during operation, preventing the blade 12 from shaking, and making the overall structure of the blade head 1 have high strength and high safety in use. The blade 12 is thinner near the cutting edge and thicker near the root, which ensures that the cutting edge can be smoothly inserted into the slotted groove 40 of the screw 4, while the overall structure of the blade 12 has high strength and is not prone to breakage.

[0037] Furthermore, the open end of the blade tube 11 has multiple circumferential notches 110, with an elastic spring 111 formed between each pair of adjacent notches 110. The ring-shaped elastic spring 111 provides a clamping and stabilizing effect on the head of the screw 4, ensuring the coaxiality of the screw 4 and the flathead bit, reducing the possibility of misalignment caused by misalignment, and solving the problems of low locking efficiency and low safety. At the same time, the multiple notches 110 also have a certain weight-reduction effect, so that the overall weight of the flathead bit is not significantly increased compared to the weight of traditional bit.

[0038] Preferably, the open end of the blade tube 11 has multiple notches 110 evenly spaced along the circumference, that is, each elastic spring 111 has the same size and spacing, so that the circumferential clamping force on the screw 4 is relatively uniform, and the coaxiality between the screw 4 and the flathead bit is guaranteed to the greatest extent.

[0039] In this embodiment, along the length of the blade tube 11, the wall thickness of the peripheral wall of the blade tube 11 gradually decreases towards the open end. This results in greater elasticity at the open end of the blade tube 11, meaning the elastic spring 111 has greater elasticity, which can effectively clamp the head of a screw 4 with a slightly larger diameter, improving practicality while ensuring the overall structural strength of the blade tube 11. It also helps to reduce the overall weight of the blade tube 11, ensuring that the overall weight of the flathead screwdriver bit is not significantly increased compared to traditional screwdriver bits, avoiding a top-heavy feel during use, and conforming to ergonomic design.

[0040] Preferably, along the length of the cutter tube 11, the outer wall surface of the cutter tube 11 is inclined towards the open end. That is, when the cutter tube 11 is cylindrical, the inner diameter of the cutter tube 11 remains unchanged, while the outer diameter of the cutter tube 11 gradually decreases towards the open end, ensuring that the inner wall of the cutter tube 11 provides stable positioning for the screw 4.

[0041] When fastening the slotted screw 4, there is no need to deliberately align the slotted groove 40. The tip 122 of the slotted screwdriver bit is always centered within the slotted groove 40, achieving an effect similar to a Phillips head. By rotating the slotted screwdriver bit or the screw 4, under the guidance of the transition slope 121, the cutting edge 12 gradually slides into the slotted groove 40 until it is aligned, achieving a complete alignment at a maximum rotation angle of 360°, greatly improving alignment efficiency. Furthermore, the symmetrical design of the transition slope 121 ensures high efficiency and consistency in fastening in both directions. At the same time, the design of the blade tube 11 effectively isolates the side of the cutting edge 12 from the surrounding structural components, avoiding injury to personnel and scratches to products, ensuring personnel safety and product quality. The design of the notch 110 allows the slotted screwdriver bit to be used with screws 4 of various sizes, that is, it can stably clamp slotted screws 4 with a diameter exceeding the inner wall diameter of the blade tube 11, and ensure the coaxiality of the screw 4 and the slotted screwdriver bit, while also reducing weight.

[0042] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A single-pin screwdriver bit, characterized in that, The device includes a cutting head, which comprises a cutting tube and a cutting edge located within the cutting tube. The cutting tube has a central axis and is open at one end. The cutting edge of the cutting edge faces the open end of the cutting tube. The end face of the cutting edge is formed by four uniformly and symmetrically arranged transition slopes along the length of the cutting edge and toward the open end of the cutting tube. Each transition slope slopes inward from its outer edge, and the four transition slopes converge at a point to form a cutting tip located on the central axis.

2. The flathead screwdriver bit according to claim 1, characterized in that, The blade tube has multiple circumferentially spaced openings at its open end, with an elastic spring formed between each pair of adjacent openings.

3. The flathead screwdriver bit according to claim 2, characterized in that, The multiple stack openings are evenly spaced.

4. The flathead screwdriver bit according to claim 1, characterized in that, The blade has two opposing narrow sides and two opposing wide sides. The width of the narrow sides is smaller than the width of the wide sides. The two narrow sides are respectively fixed to the inner wall of the blade tube. In the length direction of the blade, the thickness of the blade formed between the two wide sides gradually decreases towards the opening end.

5. The flathead screwdriver bit according to claim 1, characterized in that, Along the length of the blade tube, the wall thickness of the peripheral wall gradually decreases towards the open end.

6. The flathead screwdriver bit according to claim 5, characterized in that, Along the length of the blade tube, the outer wall surface of the blade tube is inclined toward the open end.

7. The flathead screwdriver bit according to claim 1, characterized in that, The blade tube is cylindrical.

8. The flathead screwdriver bit according to claim 1, characterized in that, It also includes a tool holder, which is connected to the end of the tool tube opposite to the open end.

9. The flathead screwdriver bit according to claim 8, characterized in that, It also includes a handle, which is connected to the end of the shank opposite to the blade head.

10. The flathead screwdriver bit according to claim 8, characterized in that, The blade and the blade holder are integrally formed, or the blade and the blade tube are integrally formed.

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