Combined long-rod screwdriver bit for electric screwdriver

Abstract

The utility model discloses a combined long rod screwdriver bit for an electric screwdriver, which comprises a long rod and a short screwdriver bit, the tail end of the long rod is provided with a long rod connecting part, an extension cylinder is sleeved outside the long rod, the tail end of the extension cylinder is in threaded connection with a lock sleeve, and the lock sleeve is used for locking the extension cylinder and the long rod. A short screwdriver head connecting part is arranged at the tail end of the short screwdriver head, and a connecting groove matched with the short screwdriver head connecting part is formed in the head end of the extension cylinder; a plurality of metal sheets are evenly arranged at the tail end of the extension cylinder, a contraction joint is arranged between every two adjacent metal sheets, and an inclined contraction part is arranged on the inner wall of the tail end of the lock sleeve. The telescopic rod part is formed by the long rod and the extension cylinder, the telescopic rod part can be connected between the electric screwdriver and the short screwdriver head, and the short screwdriver head is convenient to replace on the extension cylinder; a manufacturer and a user can achieve the use effect of multiple sets of screwdriver bits with different length specifications only through one set of short screwdriver bit and one telescopic rod part, and the cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of screwdriver tool technology, and in particular to a combination long-handled screwdriver bit for electric screwdrivers. Background Technology

[0002] Screwdriver bits are tools used to tighten screws. Their tips can be designed in various shapes to match different screws. They are usually mounted on electric screwdrivers and can quickly tighten screws.

[0003] Most existing screwdriver bits are one-piece structures and are designed and manufactured in various lengths to suit different working conditions. Short screwdriver bits have low torque and are suitable for screws that protrude from the mounting surface, while long screwdriver bits can be used to tighten screws in deep holes. However, in actual production and use, in order to meet the needs of various working conditions, manufacturers produce multiple sets of both long and short screwdriver bits. Users then need to purchase screwdriver bits of different lengths simultaneously, resulting in higher costs. Furthermore, after prolonged use, the tips of the screwdriver bits are prone to wear, which can cause them to spin freely on the screw. In this case, the entire screwdriver bit needs to be replaced, which is wasteful.

[0004] To address this issue, we propose a combination long-handled screwdriver bit for electric screwdrivers. Utility Model Content

[0005] The purpose of this invention is to provide a combined long-handled screwdriver bit for electric screwdrivers to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A combination long-handle screwdriver bit for an electric screwdriver includes a long handle and a short bit. The long handle has a long handle connecting part at its tail end, and an extension tube is sleeved on the long handle. A locking sleeve is threaded onto the tail end of the extension tube, which is used to lock the extension tube and the long handle. The short bit has a short bit connecting part at its tail end, and the head end of the extension tube has a connecting groove that matches the short bit connecting part. A magnetic block is embedded in the bottom of the connecting groove.

[0008] The tail end of the extension tube is evenly provided with several metal plates, and there is a contraction gap between adjacent metal plates. The inner wall of the tail end of the locking sleeve is provided with an inclined contraction part, and when the locking sleeve is tightened, the contraction part squeezes the metal plates tightly against the long rod.

[0009] In a further embodiment, a groove is provided inside the head end of the long rod, and a sliding rod matching the groove is connected inside the extension tube.

[0010] In a further embodiment, the cross-sectional shape of the groove and the slide rod is a regular hexagonal structure.

[0011] In a further embodiment, the cross-sectional dimensions of the short bit connector match the cross-sectional dimensions of the long rod connector.

[0012] In a further embodiment, the extension tube has an external thread on the outer wall near the metal sheet, and the locking sleeve has an internal thread that matches the external thread on the inner wall of the head end.

[0013] In a further embodiment, the tail end of the lock sleeve is provided with a flat opening, the inner diameter of which is larger than the outer diameter of the long rod, and the inner diameter of the flat opening is smaller than the minimum outer diameter of the metal sheet after it is locked.

[0014] In a further embodiment, the outer wall of the lock sleeve is provided with a plurality of grooves parallel to the axial direction, and the grooves are evenly distributed along the circumference of the lock sleeve.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention features a telescopic rod consisting of a long rod and an extension tube, which can be connected between an electric screwdriver and a short bit to form a long-rod screwdriver bit. The short bit can be easily replaced on the extension tube, allowing manufacturers and users to achieve the effect of using multiple sets of screwdriver bits of different lengths with only one set of short bits and one telescopic rod. This results in lower manufacturing and usage costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the long rod structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the tail end structure of the extension tube of this utility model;

[0020] Figure 4 This is a schematic diagram of the extended cylinder end structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the tail end structure of the lock sleeve of this utility model;

[0022] Figure 6 This is a schematic diagram of the lock head end structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the structure of this utility model after partial cross-section.

[0024] In the diagram: 1. Long rod; 11. Slide groove; 2. Short bit; 21. Short bit connector; 3. Long rod connector; 4. Extension cylinder; 41. Slide rod; 42. Metal sheet; 43. Contraction joint; 44. External thread; 45. Connecting groove; 5. Locking sleeve; 51. Contraction section; 52. Internal thread; 53. Flat end; 54. Groove; 6. Magnetic block. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-7A combination long-barrel screwdriver bit for an electric screwdriver includes a long bar 1 and a short bit 2. The long bar 1 has a long bar connecting part 3 at its tail end, which is used to connect to the electric screwdriver socket. An extension tube 4 is sleeved on the long bar 1, and a locking sleeve 5 is threaded onto the tail end of the extension tube 4. When the locking sleeve 5 is tightened, it is used to lock the extension tube 4 and the long bar 1, thereby fixing the combined length of the extension tube 4 and the long bar 1. The short bit 2 has a short bit connecting part 21 at its tail end, and the head end of the extension tube 4 has an opening that matches the short bit connecting part 21. The connecting groove 45 of the sleeve facilitates the insertion of the short screwdriver bit connecting part 21 into the connecting groove 45, thereby connecting the short screwdriver bit 2 with the extension tube 4, which is convenient for changing short screwdriver bits 2 of different shapes. Specifically, the cross-sectional dimensions of the short screwdriver bit connecting part 21 match the cross-sectional dimensions of the long rod connecting part 3, so that after the long rod 1 and the extension tube 4 are produced, they can be adapted to the short screwdriver bits already available on the market. A magnet 6 is embedded in the inner bottom of the connecting groove 45 so that the short screwdriver bit connecting part 21 can be attracted by magnetic attraction to prevent the short screwdriver bit 2 from falling out accidentally.

[0029] The tail end of the extension tube 4 is evenly provided with several metal pieces 42. The metal pieces 42 have a certain elasticity, and there is a contraction gap 43 between adjacent metal pieces 42. The inner wall of the tail end of the locking sleeve 5 is provided with an inclined contraction part 51. The contraction part 51 gradually contracts from the head end to the tail end. The outer wall of the extension tube 4 near the metal pieces 42 is provided with an external thread 44, and the inner wall of the head end of the locking sleeve 5 is provided with an internal thread 52 that matches the external thread 44. When the locking sleeve 5 is tightened, the contraction part 51 squeezes the metal pieces 42 tightly against the long rod 1. Specifically, the inner wall of the metal pieces 42 can be roughened to enhance its anti-slip ability and improve the firmness of the long rod 1 and the extension tube 4 when locked.

[0030] The long rod 1 has a groove 11 inside its head end, and the extension tube 4 is connected to a sliding rod 41 that matches the groove 11, thereby enhancing the strength of the long rod 1 and the extension tube 4. The groove 11 and the sliding rod 41 have a regular hexagonal cross-sectional shape, which can prevent the long rod 1 and the extension tube 4 from axially deflecting and slipping, and facilitate the rotation operation of the locking sleeve 5.

[0031] Furthermore, the tail end of the lock sleeve 5 is provided with a flat opening 53. The inner diameter of the flat opening 53 is larger than the outer diameter of the long rod 1, so that the lock sleeve 5 is less likely to rub against the surface of the long rod 1 when rotating. The inner diameter of the flat opening 53 is smaller than the minimum outer diameter of the metal plate 42 after locking, so that when the lock sleeve 5 is tightened, the flat opening 53 just abuts against the lower edge of the metal plate 42.

[0032] The outer wall of the lock sleeve 5 has several grooves 54 parallel to the axial direction, and the grooves 54 are evenly distributed along the circumference of the lock sleeve 5, which helps to reduce the problem of slippage on the surface of the lock sleeve 5 and makes it convenient for the user to apply force to rotate.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A combination long-handled screwdriver bit for an electric screwdriver, comprising a long handle (1) and a short bit (2), characterized in that: The long rod (1) has a long rod connecting part (3) at its tail end, and an extension tube (4) is sleeved on the long rod (1). The tail end of the extension tube (4) is threaded with a locking sleeve (5), which is used to lock the extension tube (4) and the long rod (1). The tail end of the short bit (2) has a short bit connecting part (21), and the head end of the extension tube (4) has a connecting groove (45) that matches the short bit connecting part (21). A magnetic block (6) is embedded in the bottom of the connecting groove (45). The tail end of the extension tube (4) is provided with a number of metal pieces (42) evenly distributed, and a shrinkage slit (43) is provided between adjacent metal pieces (42). The inner wall of the tail end of the locking sleeve (5) is provided with an inclined shrinkage part (51). When the locking sleeve (5) is tightened, the shrinkage part (51) squeezes the metal pieces (42) to fit tightly against the long rod (1).

2. A combination long-handled screwdriver bit for an electric screwdriver according to claim 1, characterized in that: The long rod (1) has a groove (11) inside its head end, and the extension tube (4) is connected to a sliding rod (41) that matches the groove (11).

3. A combination long-handled screwdriver bit for an electric screwdriver according to claim 2, characterized in that: The cross-sectional shape of the groove (11) and the slide rod (41) is a regular hexagonal structure.

4. A combination long-handled screwdriver bit for an electric screwdriver according to claim 1, characterized in that: The cross-sectional dimensions of the short bit connector (21) match the cross-sectional dimensions of the long rod connector (3).

5. A combination long-handled screwdriver bit for an electric screwdriver according to claim 1, characterized in that: The extension tube (4) has an external thread (44) on its outer wall near the metal sheet (42), and the locking sleeve (5) has an internal thread (52) that matches the external thread (44) on its inner wall.

6. A combination long-handled screwdriver bit for an electric screwdriver according to claim 1, characterized in that: The tail end of the lock sleeve (5) is provided with a flat opening (53), the inner diameter of which is greater than the outer diameter of the long rod (1), and the inner diameter of which is less than the minimum outer diameter of the metal piece (42) after locking.

7. A combination long-handled screwdriver bit for an electric screwdriver according to claim 1, characterized in that: The outer wall of the lock sleeve (5) is provided with a number of grooves (54) parallel to the axial direction, and the grooves (54) are evenly distributed along the circumference of the lock sleeve (5).

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