A bit holder for stable bit replacement

Abstract

This utility model discloses a screwdriver bit holder for stable bit replacement, aiming to provide a stable and smooth bit replacement mechanism that improves bit replacement efficiency. It includes a bit holder body with a magnetic suction limiting cavity and a bit limiting cavity; a movable seat with a spring connected to the magnetic suction limiting cavity, a magnetic block connected to one end of the movable seat, and the spring connected to the other end of the movable seat; a connecting piece with the spring connected to the connecting piece; a limiting ball that inserts into the magnetic suction limiting cavity, and a limiting groove on the outer side of the movable seat; a limiting sleeve that sleeves onto the bit holder body, with a second spring connected to the bit holder body; a locking ball inserted into the bit limiting cavity, which is movably connected to the bit holder body via the limiting sleeve; and a fixed sleeve with a clearance groove. The beneficial effects of this utility model are: improved efficiency and stability of screwdriver bit replacement; smooth bit replacement; and prevention of misoperation and dropping.

Description

Technical Field

[0001] This utility model relates to the field of screwdriver technology, and in particular to a screwdriver bit connector that allows for stable replacement of the bit. Background Technology

[0002] A screwdriver is a tool used to tighten or loosen screws. It typically consists of a screwdriver bit and a handle with a bit extension bar (the link between the screwdriver bit and the handle). The shape of the screwdriver bit varies depending on the type of screw, such as flathead, Phillips head, or hex head. To use a screwdriver, the bit is inserted into the screw slot in the screwdriver handle, and the handle is rotated with appropriate force. Because screwdriver bits come in various shapes, screwdrivers with interchangeable bits have been designed. By inserting the bit into the pre-drilled space in the bit extension bar and locking it with a ball joint, a screwdriver with the desired bit type can be assembled.

[0003] Chinese Patent Announcement No.: CN 222405453 U, Announcement Date: January 28, 2025. This utility model discloses a screwdriver with an easy-to-replace tip, including a handle, a sleeve rod, a magnetic tip holder, and a magnetic screwdriver tip A. The top of the handle has an integrally formed boss, and a retaining ring is fitted around the boss. A through groove is formed on the surface of the retaining ring, and the magnetic screwdriver tip B is movably disposed inside the groove. The sleeve rod is fixed to the bottom of the handle, and a square slot is formed at the bottom of the sleeve rod. Several hemispherical holes are vertically and equidistantly formed on the inner wall of the square slot. The magnetic tip holder is embedded below the sleeve rod, and the magnetic screwdriver tip A is magnetically attracted to the bottom of the magnetic block. The shortcomings of this technical solution are: 1. Poor connection stability between the tip and the magnetic tip holder, low connection efficiency of the parts, resulting in reduced tip replacement and user experience; 2. The tip and the magnetic block rely on simple magnetic attraction, losing traction the moment they separate, leading to easy misoperation and the tip falling out, affecting the stability of tip replacement and use.

[0004] In summary, screwdrivers have drawbacks such as poor efficiency and connection stability when changing the bit, and the bit is easily dropped due to accidental operation. Utility Model Content

[0005] This invention aims to overcome the shortcomings of existing screwdrivers, such as poor efficiency and connection stability when changing screwdriver bits, and the tendency for screwdriver bits to fall off accidentally. It provides a screwdriver bit connector that improves the efficiency, stability, and smoothness of screwdriver bit replacement and allows for stable bit replacement.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A bit holder for stable bit replacement, including The tool holder body is provided with a magnetic attraction limiting cavity and a tool head limiting cavity; The movable seat has a magnetic limiting cavity connected to a spring component, one end of the movable seat is connected to a magnetic block, and the other end of the movable seat is connected to the spring component. The connector and spring are connected to each other, and the connector is detachably connected to the movable seat and the magnetic limiting cavity. The limiting ball is inserted into the magnetic limiting cavity, and the outer side of the movable seat is provided with a limiting groove, and the limiting ball is slidably connected to the limiting groove; A limiting sleeve is sleeved with the tool holder body. The tool holder body is connected to a second spring component. One end of the limiting sleeve is connected to the second spring component. The limiting ball is in contact with the inner wall of the limiting sleeve. The cutting head limiting cavity is fitted with a locking ball, which is movably connected to the cutting shank body through a limiting sleeve; The fixing sleeve has a relief groove, and the other end of the limiting sleeve is inserted into the relief groove.

[0007] The end face of the tool holder has, from the outside in, a tool head limiting cavity and a magnetic limiting cavity. The tool head limiting cavity is used to insert a replacement tool head. A locking ball inside the tool head limiting cavity locks the inserted tool head. The elastic movement of the limiting sleeve switches the locking or unlocking state of the locking ball. The fixed sleeve cooperates with the limiting sleeve for stable positioning. The magnetic limiting cavity is used to house the movable seat. A magnetic block, made of a magnetic stone, is built into one end of the movable seat facing the tool head limiting cavity to attract the metal tool head and prevent it from falling out of the tool holder before locking. The other end of the movable seat is connected to an elastic element. When the movable seat is connected via the elastic element, the release of the adsorbed screwdriver tip is delayed when it is pulled out, increasing the critical force required for disengagement. This prevents sudden separation of the tip from the movable seat, avoids misoperation, and reduces the chance of the tip falling off, making the disengagement process smoother and safer while protecting the tip. The connector facilitates the assembly of the elastic element with the movable seat and the screwdriver shank, allowing for quick and stable connection of the components. The limiting ball bearing restricts the path distance of the movable seat through the limiting groove, limiting the elastic movement distance of the movable seat, thereby delaying disengagement while ensuring the stability of the components during operation. This achieves the effects of improving the efficiency and stability of screwdriver tip replacement, ensuring smooth tip replacement, and preventing misoperation and tip falling off.

[0008] Preferably, one end face of the movable seat is provided with a connecting groove, and the connecting parts include a connecting plate 1 and a connecting plate 2. The connecting plate 1 is connected to one end of the spring component 1, and the connecting plate 2 is connected to the other end of the spring component 1. The magnetic suction limiting cavity is provided with a connecting groove 2. The connecting plate 1 is threadedly connected to the connecting groove 1, and the connecting plate 2 is threadedly connected to the connecting groove 2. One end face of the movable seat is threadedly connected to the connecting plate 1 through the recessed connecting groove 1, and the connecting plate 2 is threadedly connected to the connecting groove 2. Thus, the spring component 1 can act as a fulcrum to support the elastic movement of the movable seat under the fixation of the connecting plate 2. The connection method is stable and precise, which facilitates the rapid assembly and connection of accessories within the limited space inside the tool holder body. This achieves the effect of improving the assembly efficiency of the spring component 1.

[0009] Preferably, the other end face of the movable seat is provided with a fixing groove, and the magnetic block is connected to the fixing groove. The fixing groove has a connecting hole, which is connected to the first connecting groove. The second connecting plate is connected to the mounting block. The other side of the movable seat is used for the stable internal installation of the magnetic block through the fixing groove. The bottom of the fixing groove is connected to the first connecting groove on the other side through the opening connecting hole. Therefore, before assembling the magnetic block, a tool is used to screw the mounting block of the second connecting plate through the connecting hole, so that the second connecting plate can be stably screwed into the second connecting groove, and then the magnetic block is pressed in. This achieves the effect of further stabilizing and efficiently assembling the first spring component and the magnetic block.

[0010] Preferably, the tool holder body is provided with several limiting ball holes, which are connected to the magnetic limiting cavity, and the limiting balls are inserted into the limiting ball holes. The tool holder body uses the limiting ball holes on its surface to hold the limiting balls. Due to the connection between the limiting ball holes and the magnetic limiting cavity, the limiting balls partially extend into the limiting grooves recessed on the surface of the movable seat. The outer side of the limiting balls is restricted by the limiting sleeve, thus allowing multiple limiting balls to evenly limit the movement distance of the movable seat. This achieves the effect of ensuring the horizontal and stable limiting movement of the movable seat.

[0011] Preferably, the tool holder body is provided with several locking ball holes, which are connected to the tool head limiting cavity, and the locking balls are inserted into the locking ball holes. The tool holder body has several locking ball holes, and the locking balls are placed inside these holes and locked to the tool head by the push of the limiting sleeve. When not enclosed by the limiting sleeve, the locking balls are pushed out of the locking ball holes by the force of the tool head. The presence of the fixing sleeve ensures that the locking balls are placed in the clearance groove, preventing them from falling out of the locking ball holes. Multiple locking balls increase the locking strength, achieving the effect of ensuring stable assembly of the tool head.

[0012] Preferably, the tool holder body is fitted with a fixed ring, and a movable groove is provided for limiting the movement. A second spring element is placed within the movable groove, with one end connected to the fixed ring and the other end connected to the bottom of the movable groove. The fixed ring is fixedly fitted to the outside of the tool holder body, allowing the movable seat to move elastically and automatically reset under the support of the fixed ring. This improves the operational stability of the movable seat.

[0013] Preferably, the limiting sleeve is provided with a mating groove, and the fixed sleeve and the limiting sleeve are interlocked through the mating groove and the clearance groove. The mating groove on the limiting sleeve allows the fixed sleeve and the limiting sleeve to interlock, resulting in a smooth surface at the joint after interlocking. This improves the fitting accuracy and provides a smooth, aesthetically pleasing surface for the limiting sleeve.

[0014] Preferably, the inner wall of the limiting sleeve near its end is provided with a guide groove, and the locking ball is slidably connected to the guide groove. The groove opening has a guide slope. The guide groove makes the end of the limiting sleeve thinner than other parts, allowing the locking ball to be pressed into the locking cutter head and making it easier to insert between the locking ball and the fixed sleeve. In addition, the guide groove opening has an angled guide slope, allowing the limiting sleeve to contact and apply force more smoothly with the locking ball. This improves the smoothness and stability of the limiting sleeve operation.

[0015] The beneficial effects of this utility model are: improving the efficiency and stability of screwdriver tip replacement; ensuring smooth tip replacement and preventing misoperation and drop; ensuring the stability of parts during operation; ensuring stable tip assembly; and improving the assembly accuracy and surface smoothness of parts. Attached Figure Description

[0016] Figure 1 This is a perspective view of the utility model; Figure 2 yes Figure 1 Exploded view; Figure 3 yes Figure 1 The main view; Figure 4 yes Figure 1 A sectional view; Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0017] In the diagram: 1. Tool holder body, 2. Magnetic limiting cavity, 3. Tool head limiting cavity, 4. Movable seat, 5. Spring component one, 6. Magnetic block, 7. Connecting plate one, 8. Limiting ball, 9. Limiting groove, 10. Limiting sleeve, 11. Spring component two, 12. Locking ball, 13. Fixing sleeve, 14. Relief groove, 15. Connecting groove one, 16. Connecting plate two, 17. Connecting groove two, 18. Fixing groove, 19. Connecting hole, 20. Mounting block, 21. Limiting ball hole, 22. Locking ball hole, 23. Fixing ring, 24. Movable groove, 25. Docking groove, 26. Guide groove, 27. Guide slope, 28. Anti-slip groove, 29. Anti-slip annular groove, 30. Through hole, 31. Mounting hole. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of components illustrated in these embodiments do not limit the scope of this application. For ease of illustration, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, an element described as being “below” other elements or features would be positioned “up” other elements or features. Thus, the exemplary term “down” can include both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. It should also be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale. Techniques, processes, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, processes, and equipment should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0021] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0022] Example 1: like Figure 1 , 2 As shown in Figures 3 and 4, a bit holder with stable bit replacement includes a bit holder body 1, which has a magnetic attraction limiting cavity 2 and a bit limiting cavity 3; a movable seat 4, where a spring element 5 is connected to the magnetic attraction limiting cavity 2, a magnetic block 6 is connected to one end of the movable seat 4, and the other end of the movable seat 4 is connected to the spring element 5; a connecting piece, where the spring element 5 is connected to the connecting piece, and the connecting piece is detachably connected to the movable seat 4 and the magnetic attraction limiting cavity 2; and a limiting ball 8, which is inserted into the magnetic attraction limiting cavity 2. The outer side of the movable seat 4 is provided with... A limiting groove 9 is provided, and a limiting ball 8 is slidably connected to the limiting groove 9; a limiting sleeve 10 is sleeved with the tool holder body 1, and the tool holder body 1 is connected to a spring element 2 11. One end of the limiting sleeve 10 is connected to the spring element 2 11, and the limiting ball 8 is in contact with the inner wall of the limiting sleeve 10; a locking ball 12 is inserted into the tool head limiting cavity 3, and the locking ball 12 is movably connected to the tool holder body 1 through the limiting sleeve 10; a fixing sleeve 13 is provided with a clearance groove 14, and the other end of the limiting sleeve 10 is inserted into the clearance groove 14.

[0023] like Figure 2 , 4 As shown, one end face of the movable seat 4 is provided with a connecting groove 15. The connecting parts include a connecting plate 7 and a connecting plate 16. The connecting plate 7 is connected to one end of the spring 5, and the connecting plate 16 is connected to the other end of the spring 5. The magnetic suction limiting cavity 2 is provided with a connecting groove 17. The connecting plate 7 is threadedly connected to the connecting groove 15, and the connecting plate 16 is threadedly connected to the connecting groove 17.

[0024] like Figure 4 As shown, the other end face of the movable seat 4 is provided with a fixing groove 18, the magnetic block 6 is connected to the fixing groove 18, the fixing groove 18 is provided with a connecting hole 19, the connecting hole 19 is connected to the connecting groove 15, and the connecting plate 26 is connected to the mounting block 20.

[0025] like Figure 4 As shown, the tool holder body 1 is provided with several limiting ball holes 21, the limiting ball holes 21 are connected to the magnetic limiting cavity 2, and the limiting ball 8 is inserted into the limiting ball hole 21.

[0026] like Figure 4 , 5As shown, the tool holder body 1 is provided with several locking ball holes 22, which are connected to the tool head limiting cavity 3. The locking balls 12 are inserted into the locking ball holes 22. A fixing ring 23 is sleeved on the tool holder body 1. The limiting sleeve 10 is provided with a movable groove 24. A spring element 11 is placed in the movable groove 24. One end of the spring element 11 is connected to the fixing ring 23, and the other end of the spring element 11 is connected to the bottom of the movable groove 24. The limiting sleeve 10 is provided with a mating groove 25. The fixing sleeve 13 and the limiting sleeve 10 are inserted into each other through the mating groove 25 and the clearance groove 14. The inner wall of the limiting sleeve 10 near the end is provided with a guide groove 26. The locking balls 12 are slidably connected to the guide groove 26. The groove opening of the guide groove 26 is provided with a guide slope 27.

[0027] like Figure 1-5 As shown: The limiting sleeve 10 is provided with anti-slip grooves 28. The anti-slip grooves 28 are arranged in an interlaced pattern on the surface of the limiting sleeve 10. The limiting sleeve 10 is provided with anti-slip annular grooves 29. The anti-slip annular grooves 29 are arranged in annular recesses on the limiting sleeve 10. The arrangement direction of the anti-slip annular grooves 29 is perpendicular to the elastic movement direction of the limiting sleeve 10. The depth of the anti-slip annular grooves 29 is greater than the depth of the anti-slip grooves 28 to further improve anti-slip properties and facilitate quick connection of the cutter head.

[0028] The inner wall of the cutter head limiting cavity 3 has a prismatic cross-section. The cutter head (not shown in the figure) is a conventional replaceable cutter head structure (one end is a prism) that is adapted to and inserted into the cutter head limiting cavity 3. The surface of the cutter head has a conventional locking groove that is adapted to the size of the locking ball 12 so that the locking ball 12 is locked after the cutter head is inserted.

[0029] Both spring component 5 and spring component 11 adopt conventional existing spring structures. The magnetic block 6 is connected to the fixing groove 18 by an interference fit to enhance the connection tightness and prevent it from falling off.

[0030] The inner walls of connecting groove 15 and connecting groove 27 are threaded, and the surfaces of connecting plate 17 and connecting plate 26 are threaded. The mounting block 20 is hexagonal in shape and can be turned with an internal hex screwdriver to drive the connecting plate 26 to rotate synchronously for threaded connection. The center of connecting plate 17 is provided with a through hole 30 so that an internal hex screwdriver can pass through the through hole 30. The surface of connecting plate 17 is provided with more than two mounting holes 31 so that connecting plate 17 can be easily installed in connecting groove 15 by inserting a tool into the mounting holes 31.

[0031] In use: The limiting sleeve 10 is retracted rearward (compressing the spring element 11), while the cutter head is inserted into the cutter head limiting cavity 3. The locking ball 12 is first squeezed outward by the cutter head into the clearance groove 14, then encounters the locking groove on the cutter head. The limiting sleeve 10 is then released and pushed into the clearance groove 14 of the fixing sleeve 13, so that the locking ball 12 is completely fixed in the locking groove of the cutter head. At this time, the cutter head is attached to the magnetic block 6 and is in a magnetically attracted state. During use, even if the limiting sleeve 10 is accidentally retracted, the separation of the cutter head from the magnetic block 6 is delayed due to the elastic buffering force of the spring element 5. When pulling out the cutter head, the limiting sleeve 10 is retracted backward (compressing the spring 11), the cutter head is taken out of the cutter head limiting cavity 3, the locking ball 12 rolls out of the locking groove of the cutter head, and the pulling force is applied to overcome the elastic force of the spring 5 (at this time, the movable seat 4 is pulled forward by the suction force of the pull-out fastener 6 and the spring 5 is pulled backward) and the suction force of the magnetic block 6, and then the cutter head can be pulled out for replacement.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bit holder for stable bit replacement, characterized in that, include The tool holder (1) is provided with a magnetic attraction limiting cavity (2) and a tool head limiting cavity (3). The movable seat (4) is connected to the magnetic suction limiting cavity (2) with a spring element (5), one end of the movable seat (4) is connected to a magnetic block (6), and the other end of the movable seat (4) is connected to the spring element (5); The spring component (5) is connected to the connector, and the connector is detachably connected to the movable seat (4) and the magnetic limiting cavity (2); The limiting ball (8) is inserted into the magnetic limiting cavity (2), and the outer side of the movable seat (4) is provided with a limiting groove (9), and the limiting ball (8) is slidably connected to the limiting groove (9); A limiting sleeve (10) is sleeved with a tool bar body (1). A spring element two (11) is connected to the tool bar body (1). One end of the limiting sleeve (10) is connected to the spring element two (11). The limiting ball (8) is in contact with the inner wall of the limiting sleeve (10). The cutting head limiting cavity (3) is fitted with a locking ball (12), and the locking ball (12) is movably connected to the cutting bar body (1) through the limiting sleeve (10); The fixed sleeve (13) is provided with a relief groove (14), and the other end of the limiting sleeve (10) is inserted into the relief groove (14).

2. The tool holder according to claim 1, wherein The movable seat (4) has a connecting groove 1 (15) on one end face. The connecting member includes a connecting plate 1 (7) and a connecting plate 2 (16). The connecting plate 1 (7) is connected to one end of the spring member 1 (5), and the connecting plate 2 (16) is connected to the other end of the spring member 1 (5). The magnetic suction limiting cavity (2) has a connecting groove 2 (17). The connecting plate 1 (7) is threaded to the connecting groove 1 (15), and the connecting plate 2 (16) is threaded to the connecting groove 2 (17).

3. The tool holder according to claim 2, wherein the tool holder is configured to be replaced with a new tool holder without removing the tool holder from the machine tool. The other end face of the movable seat (4) is provided with a fixing groove (18), the magnetic block (6) is connected to the fixing groove (18), the fixing groove (18) is provided with a connecting hole (19), the connecting hole (19) is connected to the first connecting groove (15), and the second connecting plate (16) is connected with an installation block (20).

4. The tool holder according to claim 1, wherein, The tool holder body (1) is provided with a plurality of limiting ball holes (21), the limiting ball holes (21) are connected to the magnetic limiting cavity (2), and the limiting ball (8) is inserted into the limiting ball hole (21).

5. A bit holder for stable bit replacement according to claim 1, characterized in that, The cutter body (1) is provided with a plurality of locking ball holes (22), the locking ball holes (22) are connected to the cutter head limiting cavity (3), and the locking ball (12) is inserted into the locking ball hole (22).

6. The tool holder according to claim 1, wherein, The tool holder body (1) is fitted with a fixed ring (23), the limiting sleeve (10) is provided with a movable groove (24), the second spring (11) is placed in the movable groove (24), one end of the second spring (11) is connected to the fixed ring (23), and the other end of the second spring (11) is connected to the bottom of the movable groove (24).

7. The tool holder according to claim 1, wherein the tool holder is a tool holder for a tool bit having a replaceable tip. The limiting sleeve (10) is provided with a butt joint groove (25), and the fixed sleeve (13) and the limiting sleeve (10) are mutually inserted through the butt joint groove (25) and the giving recess (14).

8. The tool holder according to claim 7, wherein the tool holder is configured to be replaced with a new tool holder. The inner wall of the limiting sleeve (10) near the end is provided with a guide groove (26), the locking ball (12) is in sliding connection with the guide groove (26), and the slot of the guide groove (26) is provided with a guide inclined surface (27).

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