Arrangement of a quick-change bit holder
The quick-change bit holder arrangement addresses the compactness and stability issues of conventional designs by using a tapered receiving unit, spring, and sliding sleeve mechanism for secure and rapid screwdriver bit attachment, enhancing user-friendliness and operational efficiency.
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-02-17
- Publication Date
- 2026-04-02
AI Technical Summary
Conventional quick-change bit holders are not structurally compact enough and lack adequate protection and reinforcement, compromising the reliability and speed of screwdriver bit insertion and removal.
A quick-change bit holder arrangement featuring a receiving unit with a tapered design, a spring, a sliding sleeve, and a stop ring, allowing for secure and rapid attachment and detachment of screwdriver bits through a sliding mechanism that protects internal components and ensures a compact form factor.
The design enables quick and secure insertion and removal of screwdriver bits while maintaining a compact and stable structure, reducing ineffective operations and providing intuitive control.
Smart Images
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Abstract
Description
Technical field
[0001] The invention relates to an arrangement of a quick-change bit holder, in particular an arrangement of a quick-change bit holder that is compact and stable and particularly user-friendly. State of the art
[0002] When using electric screwdrivers, a quick-change bit holder is necessary to increase work efficiency and enable the rapid insertion and removal of screwdriver bits. However, conventional quick-change bit holders are not yet structurally compact enough. Furthermore, a compact design must simultaneously provide complete protection and reinforcement of the lightweight structures of the quick-change bit holder while still ensuring reliable and rapid insertion and removal of the screwdriver bits. Therefore, there is still considerable room for improvement in conventional quick-change bit holders. Object of the invention
[0003] The invention is based on the objective of creating a quick-change bit holder arrangement that is compact and stable and particularly user-friendly, whereby the compact design enables quick insertion and replacement of the screwdriver bits. Technical solution
[0004] This problem is solved according to the invention by an arrangement of a quick-change bit holder with the features of claim 1. Advantageous embodiments are the subject of the dependent claims.
[0005] The invention provides a quick-change bit holder arrangement for connection with a screwdriver bit. The quick-change bit holder comprises a receiving unit, a spring, a sliding sleeve, and a stop ring. The receiving unit is tapered from rear to front and has a stepped design with a first base body, a second base body, and a third base body. An inclined sliding groove is arranged on the side surface of the third base body, and the stop ring is fixed to the front end of the third base body by means of an interference fit. An axially extending receiving opening for receiving the screwdriver bit is formed on the receiving unit. At least one notch is recessed into the screwdriver bit.The spring is drawn over the third base body, with a locking section provided at the end of the spring. This locking section extends in a straight line and is inserted into the sliding groove in such a way that it engages in the notch. The sliding sleeve has a stop element and is fitted over the second base body so that it can slide a limited distance between the stop ring and the first base body. By sliding the sleeve, the stop element is caused to compress the spring, temporarily disengaging the locking section from the notch. The outer diameter of the sliding sleeve is larger than or equal to the outer diameter of the stop ring, and the inner diameter of the stop element of the sliding sleeve lies between the diameter of the third base body and the diameter of the second base body.
[0006] Optionally, a magnetic cap is arranged on the inside of the bottom of the receiving opening of the receiving unit, a magnet is provided on the upper side of which for magnetic fixation of the screwdriver bit, an elastic element for applying pressure to the magnetic cap is arranged between the lower part of the magnetic cap and the receiving opening, and a stop edge is arranged on the inside of the receiving opening to limit the range of movement of the magnetic cap.
[0007] Optionally, a flange is arranged on the inside of the bottom of the receiving opening of the receiving unit to support the bottom of the receiving unit.
[0008] Preferably, an embossing is provided on the surface of the sliding sleeve.
[0009] Preferably, the outer diameter of the sliding sleeve is larger than the outer diameter of the stop ring and less than or equal to 110% of the outer diameter of the stop ring.
[0010] The inventive arrangement of a quick-change bit holder is characterized by the following: By sliding the sleeve, the locking section is temporarily released from the notch, allowing the screwdriver bit to be quickly detached from the quick-change bit holder. When the screwdriver bit engages in the receiving opening, the locking section, under the influence of the elastic restoring force of the spring, engages in the notch, thus quickly and securely mounting the screwdriver bit. The internal structures, such as the spring and the third base body, are effectively protected by the sliding sleeve. In particular, the third base body, with the smallest diameter, is well protected by the sliding sleeve. Since the outer diameter of the sliding sleeve is larger than or equal to the outer diameter of the stop ring, the stop ring is smaller and can therefore be inserted more deeply and securely.Because the sliding sleeve's range of motion is located on the outside of the second body and limited between the stop ring and the first body, it is effectively prevented from falling off. This allows for precise control of the quick-change process, reducing ineffective operation. The sliding sleeve abuts the first body, creating an intuitive feel. The stepped tapering of the first, second, and third bodies cleverly limits both the sliding sleeve's travel and accommodates the spring. This results in an extremely compact design for the quick-change bit holder, reliably ensuring fast insertion and removal of the screwdriver bit. Brief description of the drawings Fig. Figure 1 shows a perspective view of an arrangement of a quick-change bit holder according to the invention. Fig. Figure 2 shows an exploded view of the arrangement according to the invention in Fig. 1. Fig. Figure 3 shows a cross-sectional side view of the arrangement according to the invention. Fig. 1. Fig. Figure 4 shows a schematic representation of the sliding sleeve of the arrangement according to the invention. Fig. 1 before sliding the same into cross-sectional side view. Fig. Figure 5 shows a schematic representation of the sliding sleeve of the arrangement according to the invention. Fig. 1 after sliding the same into cross-sectional side view. Fig. Figure 6 shows a schematic representation of the sliding sleeve of the arrangement according to the invention. Fig. 1 before sliding the same in cross-sectional front view. Fig. Figure 7 shows a schematic representation of the sliding sleeve of the arrangement according to the invention. Fig. 1 before sliding the same in cross-sectional front view. Fig. Figure 8 shows a schematic representation illustrating the removal of the screwdriver bit from the quick-change bit holder according to the invention. Fig. Figure 9 shows a schematic representation to illustrate the comparison of the diameter of the sliding sleeve with the diameter of the first base body according to the invention. Fig. Figure 10 shows a schematic representation to illustrate the limitation of the range of motion by the sliding sleeve according to the invention. Fig. Figure 11 shows a cross-sectional side view of a further embodiment of the arrangement of a quick-change bit holder according to the invention. Fig. Figure 12 shows a schematic representation of the arrangement according to the invention, wherein the outer diameter of the sliding sleeve corresponds to the outer diameter of the stop ring. Fig. Figure 13 shows a schematic representation of the arrangement according to the invention, wherein the outer diameter of the sliding sleeve is larger than the outer diameter of the stop ring. Fig. Figure 14 shows a perspective view of another embodiment of the spring of the arrangement according to the invention. Fig. Figure 15 shows a schematic representation of the operational state of the further embodiment of the spring in Fig. 14. Detailed description of preferred embodiments
[0011] The following section will explain in more detail the tasks, features, and advantages of the present invention with reference to a detailed description of exemplary embodiments and the accompanying drawings. However, the invention is not limited to the description of these exemplary embodiments and their representation in the accompanying drawings.
[0012] As in Fig. 1 to Fig. As shown in Figure 3, the invention relates to an arrangement of a quick-change bit holder 10, wherein the quick-change bit holder 10 is designed for connection with a screwdriver bit 20. The quick-change bit holder 10 comprises a receiving unit 11, a spring 12, a sliding sleeve 13, and a stop ring 14. The receiving unit 11 is tapered from rear to front and has a first base body 111, a second base body 112, and a third base body 113, wherein an inclined sliding groove 114 is arranged on the side surface of the third base body 113, and the stop ring 14 is fixed to the front end of the third base body 113 by means of an interference fit. An axially extending receiving opening 115 for receiving the screwdriver bit 20 is formed on the receiving unit 11. At least one notch 21 is formed on the screwdriver bit 20.The spring 12 is drawn over the third base body 113, with a locking section 121 provided at the end of the spring 12. This locking section extends in a straight line and is inserted into the sliding groove 114 such that it engages in the notch 21. The sliding sleeve 13 has a stop element 131 and is placed over the second base body 112 such that it is slidable to a limited extent between the stop ring 14 and the first base body 111. As in . Fig. 4 to Fig. As shown in Figure 7, the stop element 131 is moved by sliding the sliding sleeve 13, causing the spring 12 to compress so that the locking section 121 temporarily releases from the notch 21. The outer diameter of the sliding sleeve 13 is larger than or equal to the outer diameter of the stop ring 14, and the inner diameter of the stop element 131 of the sliding sleeve 13 lies between the diameter of the third base body 113 and the diameter of the second base body 112.
[0013] Further information will be provided on Fig. 8 referred to. By sliding the sliding sleeve 13, the locking section 121 is temporarily released from the notch 21, allowing the screwdriver bit 20 to be quickly detached from the quick-change bit holder 10. When the screwdriver bit 20 clicks into the receiving opening 115, the locking section 121 engages in the notch 21 under the influence of the elastic restoring force of the spring 12, thus quickly and securely mounting the screwdriver bit 20. As in Fig. As shown in Figure 9, the internal structures, such as the spring 12 and the third base body 113, can be effectively protected by the sliding sleeve 13. In particular, the third base body 113, which has the smallest diameter, is well protected by the sliding sleeve 13. Since the outer diameter of the sliding sleeve 13 is larger than or equal to the outer diameter of the stop ring 14, the stop ring 14 is smaller and can therefore be inserted more deeply and securely. As shown in Fig. As shown in Figure 10, the movement range of the sliding sleeve 13 is located on the outside of the second base body 112 and is limited between the stop ring 14 and the first base body 111. This effectively prevents the sliding sleeve 13 from falling out, allowing for precise control of the quick-change process and reducing ineffective actuations. The sliding sleeve 13 abuts the first base body 111, creating an intuitive operating feel. The stepped tapering of the first, second, and third base bodies 111, 112, and 113 cleverly limits both the displacement of the sliding sleeve 13 and accommodates the spring 12. This results in an extremely compact design for the quick-change bit holder 10, which reliably ensures quick insertion and removal of the screwdriver bit 20.
[0014] As in Fig. As shown in Figure 3, a magnetic cap 116 is arranged on the inside of the bottom of the receiving opening 115 of the receiving unit 11, a magnet 1161 is provided on the upper side of the cap for magnetically fixing the screwdriver bit 20, an elastic element 1162 is arranged between the lower part of the magnetic cap 116 and the receiving opening 115 for acting on the magnetic cap 116, a stop edge 1151 is arranged on the inside of the receiving opening 115 to limit the range of movement of the magnetic cap 116, the screwdriver bit 20 being attracted and fixed by means of the magnet.
[0015] In Fig. Figure 11 shows a further embodiment of the inventive arrangement of a quick-change bit holder, wherein a flange 117 is arranged on the inside of the bottom of the receiving opening 115 of the receiving unit 11 to support the bottom of the receiving unit 11 in order to limit the range of movement of the screwdriver bit 20.
[0016] As in Fig. 1 and Fig. As shown in Figure 2, an embossing is provided on the surface of the sliding sleeve 13 of the arrangement according to the invention in order to improve the grip.
[0017] As in Fig. As shown in Figure 2, the spring 12 is a spiral spring, with a nose 122 arranged at the end of the locking section 121, the stop part 131 striking the nose 122 to compress the spring 12.
[0018] As in Fig. 14 and Fig. As shown in Figure 15, the spring 12 is a coil spring, wherein a nose 122 is arranged at the end end of the locking section 121, and an extension section 123 is arranged at the end end of the nose 122, wherein the locking section 121, the nose 122 and the extension section 123 together form a triangular structure which is a rigid structure and provides increased stability, thereby preventing deformations and fractures of materials, ensuring reliable engagement of the locking section 121 in the notch 21 and preventing loosening or deformation of the locking section 121.
[0019] According to the invention, the sliding groove 114 on the third base body 113 is arranged such that it runs from back to front and the opening of the sliding groove 114 is located closer to the rear side of the third base body 113 compared to the bottom of the sliding groove 114.
[0020] According to the invention, the screwdriver bit 20 and the receiving opening 115 are both hexagonally profiled.
[0021] As in Fig. 12 and Fig. As shown in Figure 13, the outer diameter of the sliding sleeve 13 is larger than the outer diameter of the stop ring 14 and less than or equal to 110% of the outer diameter of the stop ring 14, so that the sliding sleeve 13 has a suitable outer diameter and is designed to be raised so that it can be easily pulled and pushed.
[0022] Although the present invention has been described in detail with reference to exemplary embodiments, it is obvious to those skilled in the art that the invention is not limited to these exemplary embodiments, but rather that modifications are possible in such a way that individual features can be omitted or different combinations of features can be implemented, as long as the scope of protection of the appended claims is not exceeded. The disclosure of the present invention includes all combinations of the individual features presented. Reference symbol list 10 quick-change bit holders 11 Recording unit 111 first basic body 112 second basic body 113 third basic body 114 Sliding groove 115 Intake opening 1151 Stop edge 116 magnetic cap 1161 Magnet 1162 elastic element 117 Flange 12 springs 121 Locking section 122 Nose 123 Extension section 13 Sliding sleeve 131 Stop part 14 Stop ring 20 screwdriver bits 21st notch
Claims
[1] Quick-change bit holder arrangement (10) which is designed for connection with a screwdriver bit (20), characterized bythat the quick-change bit holder (10) comprises a receiving unit (11), a spring (12), a sliding sleeve (13) and a stop ring (14), wherein the receiving unit (11) is tapered from rear to front and has a first base body (111), a second base body (112) and a third base body (113), wherein an obliquely extending sliding groove (114) is arranged on the side surface of the third base body (113), wherein the stop ring (14) is fixed to the front end of the third base body (113) by means of an interference fit, wherein an axially extending receiving opening (115) for receiving the screwdriver bit (20) is formed on the receiving unit (11), wherein at least one notch (21) is formed on the screwdriver bit (20), wherein the spring (12) is drawn over the third base body (113), wherein a locking section is provided at the end of the spring (12). (121) is provided for,which extends in a straight line and is inserted into the sliding groove (114) such that it engages in the notch (21), wherein the sliding sleeve (13) has a stop element (131) and is placed over the second base body (112) in such a way that it is displaceable to a limited extent between the stop ring (14) and the first base body (111), wherein the stop element (131) is caused by sliding the sliding sleeve (13) to compress the spring (12) so that the locking section (121) is temporarily released from the notch (21), wherein the outer diameter of the sliding sleeve (13) is larger than or equal to the outer diameter of the stop ring (14) and the inner diameter of the stop element (131) of the sliding sleeve (13) lies between the diameter of the third base body (113) and the diameter of the second base body (112). [2] Quick-change bit holder arrangement according to claim 1, characterized by, that a magnetic cap (116) is arranged on the inside of the bottom of the receiving opening (115) of the receiving unit (11), a magnet (1161) is provided on the upper side of the cap for magnetically fixing the screwdriver bit (20), an elastic element (1162) for acting on the magnetic cap (116) is arranged between the lower part of the magnetic cap (116) and the receiving opening (115), and a stop edge (1151) for limiting the movement range of the magnetic cap (116) is arranged on the inside of the receiving opening (115). [3] Quick-change bit holder arrangement according to claim 1, characterized by , that a flange (117) is arranged on the inside of the bottom of the receiving opening (115) of the receiving unit (11) to support the bottom of the receiving unit (11). [4] Quick-change bit holder arrangement according to claim 1, characterized by , that an embossing is provided on the surface of the sliding sleeve (13). [5] Quick-change bit holder arrangement according to claim 1, characterized by , that the spring (12) is a coil spring, wherein a nose (122) is arranged at the end of the locking section (121), wherein the stop part (131) strikes the nose (122) to compress the spring (12). [6] Quick-change bit holder arrangement according to claim 1, characterized by , that the sliding groove (114) on the third base body (113) is arranged such that it runs from back to front. [7] Quick-change bit holder arrangement according to claim 1, characterized by , that the screwdriver bit (20) and the receiving opening (115) are both hexagonal profiled. [8] Quick-change bit holder arrangement according to claim 1, characterized by , that the outer diameter of the sliding sleeve (13) is larger than the outer diameter of the stop ring (14) and less than or equal to 110% of the outer diameter of the stop ring (14). [9] Quick-change bit holder arrangement according to claim 1, characterized by , that the spring (12) is a coil spring, wherein a nose (122) is arranged at the end end of the locking section (121), wherein an extension section (123) is arranged at the end end of the nose (122), wherein the locking section (121), the nose (122) and the extension section (123) together form a triangular structure.