Quick-release structure for a screwdriver bit

Abstract

Quick-release structure for a screw bit, primarily for inserting a screw bit (6) on the outer circumference of which several locking sections (61) are arranged at intervals around the circumference and comprises the following: an outer tube body (1) which has a through hole (11) extending from one end to the other end; a rod body (2) which is partially inserted through the through hole (11) and has a mounting hole (21) extending from one end to the other end and a first end (22), wherein the first end (22) protrudes from the through hole (11), a mounting section (221) and two lateral mounting sections (222) are formed on the outer circumference of the first end (22), the mounting section (221) and the two lateral mounting sections (222) are alternately connected to each other and the mounting section (221) is continuously connected to the mounting hole (21); a limiting element (3), wherein a part of the limiting element (3) is received in the mounting section (221), another part of the limiting element (3) is received in the two lateral mounting sections (222), the part of the limiting element (3) received in the mounting section (221) is partially passed through the mounting hole (21), while another part protrudes from the mounting hole (21); a sliding sleeve (4) which is slidably arranged at the first end (22) and covers the mounting section (221), the two lateral mounting sections (222) and the limiting element (3), wherein at least one stop block (41) is formed projecting on an inner wall of the sliding sleeve (4) and the at least one stop block (41) is carried along by the sliding sleeve (4) and movably rests against the part of the limiting element (3) projecting from the mounting hole (21); a locking element (5) which is arranged at the end section of the first end (22) and movably rests against the sliding sleeve (4); wherein, when the sliding sleeve (4) is located near the locking element (5) and the screw bit (6) is inserted into the mounting hole (21), the part of the limiting element (3) located in the mounting section (221) engages in at least one detent section (61) of the screw bit (6), wherein, on the other hand, when the screw bit (6) is pulled out of the mounting hole (21), the sliding sleeve (4) is moved in the direction of the outer tube body (1), wherein the at least one stop block (41) located inside the sliding sleeve (4) presses against the part of the limiting element (3) protruding from the mounting hole (21), so that the limiting element (3) disengages from the detent engagement with the detent section (61) of the screw bit (6).

Description

[0001] The present invention relates to a mechanism applicable in the field of hand tools and in particular to a quick-release structure for a screw bit, with which a screw bit can be quickly mounted and released.

[0002] Reference is made to the Taiwanese patent specification with publication number TW 1562865 and the title "Quick-release structure for a screw bit". This patent specifies a polygonal hole at one end of a rod body into which a screw bit can be inserted. At least one slot is formed on the outer circumference. Inside the polygonal hole, an annular groove is formed, continuously connected to the slot, with the annular groove having a tapered section towards the end. A limiting element is received in the annular groove, which can deform elastically when the screw bit is inserted or withdrawn. Furthermore, at least one stop block projects from the inside of a sliding sleeve, the stop block being received in the slot and pressing against the limiting element when the sliding sleeve is axially displaced to lock or release the screw bit.The structure described above allows for quick assembly and disassembly of a screwdriver bit.

[0003] However, the technique described above still has certain shortcomings. If the sliding sleeve is frequently moved back and forth or subjected to repeated torsional loads, the edges of the slot or the stop block may exhibit wear or deformation due to local stress concentrations. In this case, rotational deviation may occur during the axial movement of the sliding sleeve, preventing the stop block from reliably and completely pressing against the limiting element, thus impairing the engagement or release between the limiting element and the screwdriver bit.

[0004] In light of this, the inventor conducted intensive research and development work and, after numerous experiments and tests, finally developed a quick-release structure for a screwdriver bit. The limiting element is simultaneously accommodated in a mounting section and in lateral mounting sections, so that even when the sliding sleeve is in different positions, the limiting element can be guided stably through other structures.

[0005] At the same time, the direct pressing of the limiting element by the stop block ensures that the limiting element has a clear direction of force when the locking engagement is released, thereby significantly reducing the risk of structural deformations or deviations in order to remedy the aforementioned defects and meet the requirements of the users.

[0006] The object of the present invention is to enable a screwdriver bit to be inserted and released quickly and reliably during operation, thereby avoiding the impairment of the stability of the pressure exerted by the limiting element in conventional designs due to rotational deviation caused by the interaction between the stop block and the slot during guidance. To achieve the above object and eliminate the shortcomings of the prior art, the present invention relates to a quick-release structure for a screwdriver bit, primarily for inserting a screwdriver bit with several detent sections arranged circumferentially at intervals around its outer circumference, and comprising the following: an outer tube body having a through-hole extending from one end to the other;a rod body that is partially inserted through the through-hole and has a mounting hole extending from one end to the other, as well as a first end, wherein the first end protrudes from the through-hole, a mounting section and two lateral mounting sections are formed on the outer circumference of the first end, the mounting section and the two lateral mounting sections are alternately connected to each other, and the mounting section is continuously connected to the mounting hole; a limiting element, wherein a part of the limiting element is received in the mounting section, another part of the limiting element is received in the two lateral mounting sections, the part of the limiting element received in the mounting section is partially passed through the mounting hole, while another part protrudes from the mounting hole;a sliding sleeve which is slidably arranged at the first end and covers the mounting section, the two lateral mounting sections and the limiting element, wherein at least one stop block is formed projecting on an inner wall of the sliding sleeve and the at least one stop block is carried along by the sliding sleeve and movably rests against the part of the limiting element protruding from the mounting hole;a locking element arranged at the end section of the first end and movably resting against the sliding sleeve, wherein, when the sliding sleeve is near the locking element and the screw bit is inserted into the mounting hole, the part of the limiting element located in the mounting section engages in at least one detent section of the screw bit, wherein, on the other hand, when the screw bit is pulled out of the mounting hole, the sliding sleeve is moved towards the outer tube body, wherein the at least one stop block located inside the sliding sleeve presses against the part of the limiting element protruding from the mounting hole, so that the limiting element disengages from the detent engagement with the detent section of the screw bit. Fig. Figure 1 shows a schematic perspective view of the present invention. Fig. Figure 2 shows a schematic exploded view of the present invention. Fig. Figure 3 shows a schematic sectional view along section line III-III of the present invention. Fig. Figure 4 shows a schematic perspective view of the boundary element of the present invention. Fig. Figure 5 shows a schematic perspective view of the rod body of the present invention. Fig. Figure 6 shows a schematic view of the present invention, in which the screw bit is to be removed without actuating the sliding sleeve and the limiting element rests against the stop section. Fig. Figure 7 shows a schematic view of the present invention, in which the sliding sleeve is moved towards the outer tube body to remove the screw bit. Fig. Figure 8 shows a schematic view of the present invention, in which, to remove the screw bit, the sliding sleeve is moved towards the outer tube body and the stop block rests against the pressure receiving sections. Fig. Figure 9 shows a schematic view in which the present invention is assembled with a handle structure.

[0007] It will be directed to the Fig. Reference is made to sections 1 to 9. The quick-release structure according to the invention for a screw bit primarily serves to insert a screw bit 6, on the outer circumference of which several locking sections 61 are arranged at intervals around the circumference, and comprises the following: an outer tube body 1, which has a through hole 11 extending from one end to the other end; a rod body 2, which is partially inserted through the through hole 11 and has a mounting hole 21 extending from one end to the other end as well as a first end 22, wherein the first end 22 projects out of the through hole 11, a mounting section 221 and two lateral mounting sections 222 are formed on the outer circumference of the first end 22, the mounting section 221 and the two lateral mounting sections 222 are alternately connected to each other and the mounting section 221 is continuously connected to the mounting hole 21; a limiting element 3,wherein a part of the limiting element 3 is received in the mounting section 221, another part of the limiting element 3 is received in the two lateral mounting sections 222, the part of the limiting element 3 received in the mounting section 221 is partially guided through the mounting hole 21, while another part protrudes from the mounting hole 21; a sliding sleeve 4, which is slidably arranged at the first end 22 and covers the mounting section 221, the two lateral mounting sections 222 and the limiting element 3, wherein at least one stop block 41 is formed projecting on an inner wall of the sliding sleeve 4 and the at least one stop block 41 is guided by the sliding sleeve 4 and movably rests against the part of the limiting element 3 protruding from the mounting hole 21; a locking element 5, which is arranged at the end section of the first end 22 and movably rests against the sliding sleeve 4, wherein,When the sliding sleeve 4 is near the locking element 5 and the screwdriver bit 6 is inserted into the mounting hole 21, the portion of the limiting element 3 located in the mounting section 221 engages in at least one detent section 61 of the screwdriver bit 6. Conversely, when the screwdriver bit 6 is withdrawn from the mounting hole 21, the sliding sleeve 4 moves towards the outer tube body 1, with the at least one stop block 41 located inside the sliding sleeve 4 pressing against the portion of the limiting element 3 protruding from the mounting hole 21, thus disengaging the limiting element 3 from the detent engagement with the detent section 61 of the screwdriver bit 6. The drawings used in the description serve only to illustrate the present invention and are not intended to limit the scope of protection of the invention.

[0008] To insert the screwdriver bit 6, the user inserts it into the mounting hole 21 via the first end 22 of the rod body. During insertion, the outer surface of the screwdriver bit 6 presses against the limiting element 3, causing the limiting element 3 to deform elastically and move outwards. When the locking section 61 of the screwdriver bit 6 is moved into the position corresponding to the limiting element 3, the limiting element 3 returns to its initial position due to its own elasticity and engages in one or more locking sections 61, thus positioning the screwdriver bit 6. To remove or replace the screwdriver bit 6, the sliding sleeve 4 must be actuated so that it moves towards the outer tube body 1.In this state, the at least one stop block 41, which projects from the inner wall of the sliding sleeve 4, rests against the part of the limiting element 3 arranged in the mounting section 221 and protruding from the mounting hole 21, causing the limiting element 3 to deform under force. This releases the locking position between the limiting element 3 and the screw bit 6, allowing the screw bit 6 to be easily loosened, as shown in the figures. Fig. Numbers 1 to 8 are shown.

[0009] Building on the above description, to prevent the sliding sleeve 4 from detaching from the rod body 2 due to excessive displacement during operation by the user when replacing or removing the screwdriver bit 6, and thus impairing the entire workflow and operational safety, a locking element 5 is provided at the end section of the first end 22 of the rod body 2. This locking element serves to limit the axial displacement range of the sliding sleeve 4. Furthermore, to facilitate operation of the sliding sleeve 4 by the user, a non-slip knurling 42 is formed on the outer surface of the sliding sleeve 4. To further ensure that the sliding sleeve 4 can precisely press against and bear against the limiting element 3, the stop block 41 can project inwards from the inner wall of the sliding sleeve 4 in an annular shape.This allows the stop block 41 to remain in precise contact with the limiting element 3 and deform it when the sliding sleeve 4 is moved towards the outer tube body 1, thus releasing the locking of the screw bit 6, as shown in the . Fig. Numbers 1 to 8 are shown.

[0010] Furthermore, the limiting element 3 has one closed segment 31 and two open segments 32. One end of each open segment 32 is connected to the closed segment 31. The closed segment 31 can perform a clamping function, so that when the screwdriver bit 6 is inserted into the mounting hole 21 and the limiting element 3 is thereby deformed, an inward clamping force is maintained. The open segments 32, on the other hand, provide space for elastic deformation when the screwdriver bit 6 is inserted into the mounting hole 21, so that the limiting element 3 can expand outwards and, when the locking sections 61 of the screwdriver bit 6 correspond to the position of the limiting element 3, return to its original shape and engage in the locking sections 61, as shown in the Fig. Numbers 1 to 8 are shown.

[0011] Building on the description above, the closed segment 31 further comprises a transverse bar section 311 and two vertical sections 312. The two ends of the transverse bar section 311 are each connected to the two vertical sections 312, while the other ends of the two vertical sections 312 are each connected to the corresponding open segments 32. Furthermore, the mounting section 221 additionally has a mounting recess 2211 that is continuously connected to the mounting hole 21. The two lateral mounting sections 222 each also have a mounting groove 2221, wherein one end of each mounting groove 2221 has an opening 2222 and each opening 2222 is continuously connected to the mounting recess 2211. When installing the limiting element 3, the crossbar section 311 is received in the mounting section 221, whereby part of the crossbar section 311 is passed through the mounting recess 2211 and the mounting hole 21.The vertical sections 312 are each guided through the corresponding openings 2222 from the mounting recess 2211, while the open segments 32 are each inserted into the corresponding mounting grooves 2221. Due to the radial size difference between the mounting section 221 and the lateral mounting sections 222, a portion of the limiting element 3 protrudes from the mounting section 221 after complete installation, so that when the sliding sleeve 4 is moved towards the outer tube body 1, precise contact with the limiting element 3 can be achieved and its displacement limited.Furthermore, the coordinated design between the mounting recess 2211, the openings 2222 and the mounting grooves 2221 and the open segments 32 and the closed segment 31 of the limiting element 3 makes it easier to install or replace the limiting element 3 by deforming the limiting element 3 due to its elastic recovery capacity and thus being able to be directly removed or installed, as shown in the . Fig. Numbers 1 to 8 are shown.

[0012] Continuing the description above, each of the two lateral mounting sections 222 also has a stop section 223. If the sliding sleeve 4 is not displaced and the user pulls out the screwdriver bit 6 in a direction opposite to the direction of the outer tube body 1, the limiting element 3 is pulled and moved along with the locking sections 61 due to its engagement with them, and moves until it comes to rest against the respective stop sections 223, thereby achieving an additional limit to prevent the screwdriver bit 6 from being pulled out and to ensure safety during use. Furthermore, several pressure-absorbing sections 33 are formed at the connection points between the crossbar section 311 and the two vertical sections 312, with these pressure-absorbing sections 33 each protruding from the mounting hole 21.When the sliding sleeve 4 is moved towards the outer tube body 1, the stop block 41, which projects from the inner wall of the sliding sleeve 4, presses against the pressure-receiving sections 33, so that a defined and uniform pressure force is exerted on the limiting element 3, causing the limiting element 3 to deform and the engagement between the limiting element 3 and the detent section 61 to be released, so that the screw bit 6 can be easily pulled out of the mounting hole 21, as shown in the . Fig. Numbers 1 to 8 are shown.

[0013] Furthermore, to adapt to different application requirements, a connecting element 7 is provided, which is inserted into the mounting hole 21 via the second end 23 of the rod body 2 opposite the first end 22 and is movably connected to a handle structure 8, thus facilitating the operation of the entire tool and the transmission of force. The screwdriver bit 6 also has a drive end 62 and a mounting end 63, the mounting end 63 being inserted into the mounting hole 21 via the first end 22 of the rod body 2. The detent sections 61 are arranged at intervals around the outer surface of the mounting end 63 to interact with the limiting element 3 and enable detent positioning, as shown in the Fig. Shown 1 to 9.

[0014] Furthermore, a magnetically attracting arrangement 9 is arranged in the mounting hole 21. The magnetically attracting arrangement 9 comprises a seat body 91, a magnetically attracting element 92, and a spring element 93. The magnetically attracting element 92 is arranged in the first mounting hole 911 of the seat body 91, while the spring element 93 extends partially through the second mounting hole 912 of the seat body 91. The two ends of the spring element 93 are resiliently positioned between the seat body 91 and the connecting element 7 and bear elastically against both, so that the magnetically attracting element 92 exerts an elastic thrust force within the mounting hole 21. Furthermore, the outer diameter of the end of the screwdriver bit 6 inserted into the mounting hole 21 is slightly smaller than the inner diameter of the first mounting hole 911.When the screwdriver bit 6 is inserted into the mounting hole 21, the magnetically attracting element 92 magnetically interacts with the screwdriver bit 6 and further positions it. Part of the screwdriver bit 6 can be inserted into the first mounting hole 911, which also limits the position of the screwdriver bit 6 and thus further improves stability during use. When the screwdriver bit 6 is released from the engaged state and is in the release state, the spring element 93 presses against the seat body 91, causing the seat body 91 to move towards the first end 22. In this state, the screwdriver bit 6 is pushed outwards from the mounting hole 21. Because the screwdriver bit 6 and the magnetically attracting element 92 are magnetically attracted to each other, the screwdriver bit 6 is not immediately ejected by the action of the spring element 93 during its release process.This allows the user to remove the screw bit 6 stably and conveniently, thus avoiding any impairment of smooth operation due to a possible jamming of the structure, as in the . Fig. 3 and Fig. 7 shown. Reference symbol list 1 Outer tube body 11 Through hole 2 rod bodies 21 mounting holes 22 first end 221 Assembly section 2211 Mounting recess 222 side mounting section 2221 Mounting groove 2222 Opening 223 Stop section 23 second end 3 Boundary element 31 closed segment 311 Crossbar section 312 vertical section 32 open segment 33 Pressure absorption section 4 sliding sleeve 41 Stop block 42 anti-slip ribbing 5 safety element 6 screw bits 61 Rest area 62 Drive end 63 End of assembly 63 7 Connecting element 8 Handle structure 9 magnetically attractive arrangement 91 Seat bodies 911 first mounting hole 912 second mounting hole 92 magnetically attractive element 93 Spring element

Claims

[1] Quick-release structure for a screw bit, primarily for inserting a screw bit (6) on the outer circumference of which several locking sections (61) are arranged at intervals around the circumference and comprises the following: an outer tube body (1) which has a through hole (11) extending from one end to the other end; a rod body (2) which is partially inserted through the through hole (11) and has a mounting hole (21) extending from one end to the other end and a first end (22), wherein the first end (22) protrudes from the through hole (11), a mounting section (221) and two lateral mounting sections (222) are formed on the outer circumference of the first end (22), the mounting section (221) and the two lateral mounting sections (222) are alternately connected to each other and the mounting section (221) is continuously connected to the mounting hole (21); a limiting element (3), wherein a part of the limiting element (3) is received in the mounting section (221), another part of the limiting element (3) is received in the two lateral mounting sections (222), the part of the limiting element (3) received in the mounting section (221) is partially passed through the mounting hole (21), while another part protrudes from the mounting hole (21); a sliding sleeve (4) which is slidably arranged at the first end (22) and covers the mounting section (221), the two lateral mounting sections (222) and the limiting element (3), wherein at least one stop block (41) is formed projecting on an inner wall of the sliding sleeve (4) and the at least one stop block (41) is carried along by the sliding sleeve (4) and movably rests against the part of the limiting element (3) projecting from the mounting hole (21); a locking element (5) which is arranged at the end section of the first end (22) and movably rests against the sliding sleeve (4); wherein, when the sliding sleeve (4) is located near the locking element (5) and the screw bit (6) is inserted into the mounting hole (21), the part of the limiting element (3) located in the mounting section (221) engages in at least one detent section (61) of the screw bit (6), wherein, on the other hand, when the screw bit (6) is pulled out of the mounting hole (21), the sliding sleeve (4) is moved in the direction of the outer tube body (1), wherein the at least one stop block (41) located inside the sliding sleeve (4) presses against the part of the limiting element (3) protruding from the mounting hole (21), so that the limiting element (3) disengages from the detent engagement with the detent section (61) of the screw bit (6). [2] Quick-release structure according to claim 1, wherein the limiting element (3) further comprises a closed segment (31) and two open segments (32), wherein one end of each open segment (32) is connected to the closed segment (31). [3] Quick-release structure according to claim 1 or 2, wherein the two lateral mounting sections (222) each further comprise a stop section (223), wherein, when the sliding sleeve (4) is not displaced and the screw bit (6) is pulled out in a direction opposite to the direction of the outer tube body (1), the limiting element (3) rests movably against the respective stop sections (223). [4] Quick-release structure according to claim 2, wherein the closed segment (31) further comprises a transverse bar section (311) and two vertical sections (312), wherein the two ends of the transverse bar section (311) are each connected to the two vertical sections (312), while the other ends of the two vertical sections (312) are each connected to the corresponding open segments (32). [5] Quick-release structure according to claim 4, in which several pressure-receiving sections (33) are formed at the connection points between the transverse bar section (311) and the two vertical sections (312), wherein the pressure-receiving sections (33) each protrude from the mounting hole (21), wherein, when the sliding sleeve (4) is moved in the direction of the outer tube body (1), each pressure-receiving section (33) movably presses against the at least one stop block (41). [6] Quick-release structure according to one of the preceding claims, wherein the rod body (2) has a second end (23) on the side opposite the first end (22), furthermore a connecting element (7) is provided which can be inserted at one end through the second end (23) via the mounting hole (21) and can be connected at the other end to a handle structure (8). [7] Quick-release structure according to one of the preceding claims, wherein the mounting section (221) additionally has a mounting recess (2211) continuously connected to the mounting hole (21), wherein the two lateral mounting sections (222) each further have a mounting groove (2221), wherein one end of each mounting groove (2221) has an opening (2222) and each opening (2222) is continuously connected to the mounting recess (2211). [8] Quick release structure according to claim 4, wherein the crossbar section (311) and the two open segments (32) are located on different horizontal planes. [9] Quick-release structure according to claim 6, in which a magnetically attracting arrangement (9) is further provided, which is arranged in the mounting hole (21) and comprises a seat body (91), a magnetically attracting element (92) and a spring element (93), wherein a first mounting hole (911) and a second mounting hole (912) are provided in the seat body (91), the magnetically attracting element (92) is arranged in the first mounting hole (911), a part of the spring element (93) is inserted into the second mounting hole (912) and the two ends of the spring element (93) are each elastically in contact with the seat body (91) and the connecting element (7). [10] Quick-release structure according to one of the preceding claims, wherein the outer surface of the sliding sleeve (4) further comprises an anti-slip ribbing (42).

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