TWI823502B - End-operated quick release screwdriver bit holder - Google Patents

Abstract

The present invention provides an end-operated quick release screwdriver bit holder, which mainly includes a rod body, an expandable limiter and an embedded sliding sleeve, wherein the embedded sliding sleeve is assembled at the notch of the polygonal slot set on the rod body, the embedded sliding sleeve includes an embedded cylinder and a pressure control end. The embedded sliding sleeve has an axial actuating stroke and includes the first position and the second position. The embedded cylinder includes a plurality of full suppression blocks spaced in an annular manner and located at the axial equal height position and a plurality of walls connecting the full suppression blocks. The radial width of each full suppression blocks is larger than the line diameter of the expandable limiter, the radial width of the walls is relatively smaller than the radial surface width of each full suppression blocks, and the pressure control end is protruded outside the notch for pressure control.

Description

End-operated screwdriver bit quick release

The present invention relates to a screwdriver bit quick release; in particular, it refers to an innovative end-operated screwdriver bit quick release structural type revealer.

The conventional structure of hand tools usually has a socket sleeve pivoted at the working end of the hand tool to set the corresponding screwdriver bit. Most of the screwdriver bits are fixed using steel ball engagement. Since the steel ball engagement requires The steel balls are placed on the inner side wall of the socket, and an outer casing is placed on the outside of the socket. The steel balls are driven by sliding the bead groove provided on the inside of the outer casing to achieve the function of selectively locking or releasing the screwdriver head. However, the internal space of the socket barrel is limited, so it is not only inconvenient to install springs and steel balls in the limited space, but also difficult to process, which relatively increases the processing cost of the socket barrel. Furthermore, in order to process the bead groove, the socket must have a certain wall thickness so that it can maintain sufficient strength after processing. Therefore, the diameter of the entire socket will become thicker, which not only wastes material but also makes the entire set of tools heavier. It is easy to carry, but it also causes inconvenience in use and operation in a small operating space.

Although the applicant of this case has previously publicly disclosed another conventional structure type that uses C-type buckles or O-rings to replace the aforementioned steel balls (Note: Please refer to the previous invention patent case of "Screwdriver Head Quick-Release Structure" with Certificate No. I562865 ), however, it has been found that this conventional structural type still has some problems in practical application experience. For example, it is still criticized for having too many components and difficulty in manufacturing and processing. In other words, its assembly The component part must include a rod body, a C-shaped buckle (or O-ring), a sliding sleeve and a limit ring body (note: to prevent the sliding sleeve from coming out), and the end of the rod sleeve segment It must also be re-processed to form a slotted shape. In addition, because the sliding sleeve is set around the body of the rod, it will inevitably cause the outer diameter of the screwdriver quick release product to expand and make it difficult to miniaturize, and its slotted shape This is to achieve the purpose of controlling the buckle, but the slotted shape will inevitably lead to the disadvantage that the strength of the rod body structure is relatively reduced. Therefore, this conventional structure still has room for improvements and breakthroughs in many aspects such as assembly, processing, miniaturization, and structural strength. This is indeed worthy of the attention and attention of the relevant industry. Important technical issues for breakthrough.

The main purpose of the present invention is to provide an end-controlled screwdriver bit quick release. The technical problem it aims to solve is how to develop a new screwdriver bit quick release structure that is more ideal and practical. Think about the goal, innovate and make breakthroughs.

Based on the foregoing purpose, the technical feature of the present invention to solve the problem mainly lies in that the end-operated screwdriver bit quick release device includes: a rod body extending along an axial direction to form a head end and a tail end, wherein the tail end The end has a set of connecting sections, and the head end is axially concave to form a polygonal slot for inserting a screwdriver head, and a plurality of clamping edges are formed at the same height in the axial direction of the screwdriver head, and the polygonal slot includes a plurality of A groove surface and a plurality of corners connected between adjacent groove surfaces. The polygonal slot is adjacent to an expanded groove section corresponding to the head end of the rod body. The expanded groove section has a notch, and the expanded groove section faces the notch. An anti-detachment limit ring groove and an expansion groove of the limiter are formed in sequence at axial intervals, and a restraining edge is formed adjacent to the expansion groove of the limiter toward the notch; an expandable limiter The piece is accommodated in the expansion slot of the limiter of the polygonal slot. The expandable limiter is defined to have an outer diameter, an inner diameter and a wire diameter. The inner diameter must be smaller than the corner portion of the polygonal slot by a circumference. The line connection defines the diameter of the circumscribed circle, and when the screwdriver head is inserted into the polygonal slot, an expandable stopper is formed to fit exactly into the latching edges of the screwdriver head, thereby positioning the screwdriver head; an inner The embedded sliding sleeve is assembled at the notch of the polygonal slot. The embedded sliding sleeve includes an inner cylinder part and a pressure control end. The inner cylinder part is formed with a through hole for the screwdriver head to pass through. The barrel insert assembly fits inside the expanded groove section of the polygonal slot, and the inner barrel forms a ring flange that is correspondingly embedded in the anti-separation limit ring groove, and makes the gap between the anti-separation limit ring groove and the ring flange It has an axial matching clearance, and constitutes an embedded sliding sleeve with an axial actuation stroke, and includes a first position and a second position; and the embedded cylinder part includes a plurality of fully pressed blocks spaced in a ring and connected to each other. There are a plurality of connecting walls of the fully suppressed block, and these fully suppressed blocks and the connecting walls are all located at the same height in the axial direction. The radial surface width of each fully suppressed block is greater than the line diameter of the expandable limiter, and The pressure control end protrudes outside the notch for the purpose of applying force and pressure control, and restrains the edge and the connecting wall to be arranged oppositely in the circumferential direction; when the embedded sliding sleeve is in the first position, it refers to the expandable type. The limiter is aligned and inserted into the latching edges of the screwdriver head to position the screwdriver head. At this time, the expandable limiter is restrained by the restraining edge and presents an anti-falling state, and the pressure control end is in a state where it is not applied. The state of force and pressure control; when the embedded sliding sleeve is in the second position, the pressure control end is forced to control the displacement, forming each fully suppressed block to forcibly push the expandable limiter away from the restraining edge and continue Displacement toward the expansion slot of the limiting member causes the expandable limiting member to break away from the clamping edges of the screwdriver head, thereby forming a released state of the screwdriver head.

The main effects and advantages of the present invention are that the screwdriver bit quick release product can achieve many advantages and practical progress, such as further simplification of components, miniaturization, and better structural strength.

Please refer to Figures 1 to 7, which are preferred embodiments of the end-operated screwdriver bit quick release of the present invention. However, these embodiments are for illustration only and are not limited by this structure in patent applications. .

The end-operated screwdriver bit quick release device includes the following components: a rod body 10 extending along an axial direction L1 to form a head end 11 and a tail end 12, wherein the tail end 12 has a set of Connected to the section 13, the head end 11 is axially concave to form a polygonal slot 14 for inserting a screwdriver head 20, and a plurality of clamping edge portions 21 are formed at the same axial height of the screwdriver head 20. The polygonal slot 14 includes a plurality of groove surfaces 141 and a plurality of corner portions 142 connected between adjacent groove surfaces 141. The polygonal slot 14 is adjacent to an expanded groove section 15 corresponding to the head end 11 of the rod body 10. The expanded groove section 15 has a notch 16, and the expanded groove section 15 sequentially forms an axially spaced anti-detachment annular groove 17 and a limiter expansion groove 18 inwardly of the notch, and The limiter expansion groove 18 is formed with a restraining edge 19 (number is not limited) adjacent to the notch 16; an expandable limiter 30 is accommodated in the polygonal slot 14. At the expansion groove 18, the expandable limiting member 30 defines an outer diameter 31, an inner diameter 32, and a line diameter 33 formed between the outer diameter 31 and the inner diameter 32, wherein the inner diameter 32 must 32 is smaller than a circumscribed circle diameter L3 formed by connecting each corner portion 142 of the polygonal slot 14 with a circumferential line L2 (as shown in FIG. 7 ), when the screwdriver head 20 is inserted into the polygonal slot 14 , the expandable limiting member 30 is configured to be exactly embedded in the card edge portions 21 of the driver head 20, thereby positioning the driver head 20 (as shown in Figure 4); an embedded sliding sleeve 40 , assembled at the slot 16 of the expanded groove section 15, the built-in sliding sleeve 40 includes an built-in cylinder portion 41 and a pressure control end 42. The built-in cylinder portion 41 is formed with a through hole 43 for the The screwdriver head 20 is inserted, and the inner cylinder part 41 is inserted and matched inside the expanded groove section 15 of the polygonal slot 14. The inner cylinder part 41 is formed with an annular flange 44 correspondingly embedded in the anti-disengagement limit. is located in the ring groove 17, and there is an axial matching gap L4 (as shown in Figure 5) between the anti-detachment limiting ring groove 17 and the ring flange 44, so that the embedded sliding sleeve 40 has An axial actuation stroke, and includes a first position and a second position; wherein, the inner cylinder portion 41 includes a plurality of fully pressed blocks 441 arranged in a spaced circle and a plurality of connections connecting each of the fully pressed blocks 441 Wall 442, and wherein, the fully pressed blocks 441 and the connecting wall 442 are all located at the same height in the axial direction, and the radial surface width of each fully pressed block 441 is greater than that of the expandable limiting member 30 The wire diameter is 33, and the pressure control end 42 is exposed outside the notch 16 for the purpose of applying force and pressure control, and the restraining edge 19 and the connecting wall 442 are arranged oppositely in the circumferential direction; when the When the embedded sliding sleeve 40 is in the first position, as shown in FIG. 4 and FIG. 5 , it means that the expandable limiting member 30 is aligned and engaged with the clamping edge portions 21 of the driver head 20 to position the screwdriver head 20 . The state of the screwdriver head 20 , at this time, the expandable limiting member 30 is restrained by the restraining edge 19 and presents an anti-falling state, and the pressure control end 42 is in a state where no pressure is applied; and when the inner When the embedded sliding sleeve 40 is in the second position, as shown in FIGS. 8 and 9 , the pressure control end 42 is pressed to control displacement, forming each fully pressed block 441 to force the expandable limiting member 30 Push away from the restraining edge 19 and continue to move toward the expansion groove 18 of the limiter, so that the expandable limiter 30 is separated from the latching edges 21 of the driver head 20, thus forming a released state of the driver head 20. (As shown in Figure 8-10).

The radial surface width of the connecting walls 442 is relatively smaller than the radial surface width of each fully pressed block 441 . Through the restriction conditions described in this example, the releasing and retracting and constraining positioning action parts of the screwdriver head 20 can be offset in the circumferential direction (but at the same height in the axial direction), and the effect will not increase the strength of the rod body 10 outer diameter, thereby achieving the advantage of miniaturizing the product volume.

As shown in FIGS. 3 and 4 , in this example, a magnetic seat 50 is installed inside the polygonal slot 14 , and an elastic element 60 is supported between the magnetic seat 50 and the assembly section 13 for insertion. The screwdriver head 20 placed in the polygonal slot 14 generates an elastic pushing force. In this example, through the arrangement of the elastic element 60, when the screwdriver head 20 is in the released state, the magnetic base 50 can be pushed through the elastic member 60, and the screwdriver head 20 can be pushed out as shown in Figure 8, so that the user can take it out.

As shown in FIG. 6 (and shown in conjunction with FIG. 7 ), in this example, the through hole 43 of the embedded cylinder part 41 is further formed with an expanded edge part 435 corresponding to each corner part 142 of the polygonal slot 14 . . In this example, the shape of the expanded edge portion 435 is used to prevent the screwdriver head 20 from getting stuck due to the tightness between the screwdriver head 20 and the through hole 43 of the inner cylinder portion 41 .

Among them, the tail end 12 is formed with any one of the following functional types: a combination functional type (as shown in Figure 1) or a control functional type (not shown in the figure, such as a handle or a bent angle rod type). ).

As shown in FIG. 2 , in this example, the pressure control end 42 is in an enlarged diameter shape relative to the inner cylindrical portion 41 , and the through hole 43 of the inner cylindrical portion 41 is in a polygonal outline.

With the above structural composition and technical features, the end-controlled screwdriver bit quick release disclosed by the present invention is first used as shown in Figures 4 to 5. The embedded sliding sleeve 40 is in the first position, that is, the screwdriver bit. 20 is inserted into the polygonal slot 14 of the head end 11 of the rod body 10 to obtain the positioning state. At this time, the expandable limiter 30 is aligned and embedded in the edge portions 21 of the driver head 20 to position the driver head 20. Moreover, the expandable limiting member 30 is restrained by the restraining edge 19 to prevent it from falling off, and the pressure control end 42 is in a state where no pressure is exerted on it. When the embedded sliding sleeve 40 is in the second position, as shown in Figures 8 and 9, the pressure control end 42 is forced to pressure control (as shown by arrow L5) displacement, forming each fully suppressed block 441. The expandable limiter 30 is forcibly pushed away from the restraining edge 19 and continues to move toward the expansion groove 18 of the limiter, so that the expandable limiter 30 is separated from the clamping edges 21 of the screwdriver head 20 , thereby forming the released state of the screwdriver head 20. At this time, the magnetic base 50 is pushed through the elastic element 60, thereby pushing out the screwdriver head 20 (as shown by arrow L6).

The necessary components of the end-operated screwdriver bit quick release disclosed by the present invention for controlling the positioning and releasing state of the screwdriver bit 20 can be simplified to the rod body 10, the expandable limiter 30 and the embedded sliding sleeve 40. Therefore, It enables the screwdriver bit quick release product to achieve better industrial economic benefits by further simplifying the components and significantly reducing manufacturing and assembly costs. And the inner cylinder part 41 of the embedded sliding sleeve 40 is inserted into the expanded groove section 15 of the polygonal slot 14 of the rod body 10, and only the pressure control end 42 is exposed outside the groove 16 for the user to apply force. It is used for control, so it is more conducive to the development and design trend of miniaturization of screwdriver quick release products. In addition, the inner cylindrical portion 41 includes a plurality of fully pressed blocks 441 arranged in a spaced circle and located at equal heights in the axial direction and a connecting wall 442 connecting each fully pressed block 441, and the diameter of each fully pressed block 441 is Characteristics such as the face width being larger than the wire diameter 33 of the expandable limiter 30 ensure that each pushing action of the embedded sliding sleeve 40 against the expandable limiter 30 can achieve stable and reliable quality. The connecting wall 442 connecting each fully pressed block 441 allows the built-in sliding sleeve 40 to have better structural strength, thereby ensuring its sturdiness and durability.

10: Rod body

11: Head end

12:Tail end

13: Group connection section

14:Polygon slot

141: Groove surface

142:Corner part

15: Expansion section

16: Notch

17: Anti-off limit ring groove

18: Limiter expansion slot

19:Restrict the edge

20: Screwdriver head

21: Card edge part

30: Expandable limiter

31:Outer diameter

32:Inner diameter

33: Wire diameter

40: Built-in sliding sleeve

41: Built-in cylinder part

42: Voltage control terminal

43:Perforation

435: Expanding the edge outside the material

44: Ring flange

441: Full suppression block

442:Connect wall

50:Magnetic base

60: Elastic element

L1: axial

L2: Circular line

L3: circumscribed circle diameter

L4: Axial fit clearance

L5, L6: arrow number

Note: For the meanings of 5 in Figure 4, 9 in Figure 8, 6-6 and 7-7 in Figure 5, 10-10 in Figure 9, etc., please refer to the diagram for a brief description.

Figure 1 is an assembled perspective view of a preferred embodiment of the present invention. Figure 2 is an exploded perspective view of some components of the preferred embodiment of the present invention. Figure 3 is an exploded sectional view of partial components of the preferred embodiment of the present invention. Figure 4 is an assembled cross-sectional view of partial components of the preferred embodiment of the present invention. Figure 5 is an enlarged view of the portion marked 5 in Figure 4 . Figure 6 is a cross-sectional view of Figure 5 at line 6-6. Figure 7 is a cross-sectional view of Figure 5 at 7-7. Figure 8 is a schematic diagram of the release state of the screwdriver head according to the preferred embodiment of the present invention. Figure 9 is an enlarged view of the portion marked 9 in Figure 8 . Figure 10 is a cross-sectional view of Figure 9 at 10-10.

10: Rod body

11: Head end

14:Polygon slot

141: Groove surface

142:Corner part

15: Expansion section

16: Notch

17: Anti-off limit ring groove

18: Limiter expansion slot

19:Restrict the edge

20: Screwdriver head

21: Card edge part

30: Expandable limiter

40: Built-in sliding sleeve

41: Built-in cylinder part

42: Voltage control terminal

43:Perforation

435: Expanding the edge outside the material

44: Ring flange

L1: axial

Claims (6)

An end-operated screwdriver bit quick release device, including: A rod body is formed along an axial extension shape with a head end and a tail end, wherein the tail end has a set of connecting sections, and the head end is axially concave to form a polygonal slot for a joint. The head is inserted, and a plurality of clamping edge portions are formed at the same height in the axial direction of the driver head. The polygonal slot includes a plurality of groove surfaces and a plurality of corner portions connected between adjacent groove surfaces. The polygonal socket The groove is adjacent to an expanded groove section corresponding to the head end of the rod body. The expanded groove section has a notch, and the expanded groove section sequentially forms an axially spaced anti-fall-off limiting ring groove inward of the notch. A limiter expands the groove, and the expansion groove of the limiter forms a restraining edge adjacent to the notch; An expandable limiter is received at the expansion groove of the limiter in the polygonal slot. The expandable limiter is defined to have an outer diameter, an inner diameter, and a distance between the outer diameter and the inner diameter. A wire diameter formed between them, wherein the inner diameter must be smaller than the diameter of the circumscribed circle defined by connecting the corner portions of the polygonal slot with a circumferential line. When the screwdriver head is inserted into the polygonal slot, it is The expandable limiting member is configured to be embedded in the latching edges of the screwdriver head, thereby positioning the screwdriver head; and An embedded sliding sleeve is assembled at the notch of the expanded groove section. The embedded sliding sleeve includes an embedded cylinder part and a pressure control end. The embedded cylinder part is formed with a through hole for the screwdriver. The head is inserted, wherein the inner cylinder part is inserted into the expansion groove section of the polygonal slot, and the inner cylinder part is formed with a ring flange corresponding to be embedded in the anti-detachment limit ring groove, and make the There is an axial matching gap between the anti-separation limit ring groove and the ring flange, which constitutes the embedded sliding sleeve to have an axial actuation stroke in use, and includes a first position and a second position; wherein , the inner cylinder part includes a plurality of fully pressed blocks arranged in an interval ring and a plurality of connecting walls connecting the fully pressed blocks, and wherein the fully pressed blocks and the connecting walls are all located at the same height in the axial direction position, the radial surface width of each fully pressed block is greater than the wire diameter of the expandable limiter, and the pressure control end is protruding outside the notch for the purpose of applying force and pressure control and the restraining edge The portion and the connecting wall are arranged opposite to each other in the circumferential direction; when the embedded sliding sleeve is in the first position, it means that the expandable limiting member is aligned and embedded in the card edge portions of the screwdriver head. Thereby the screwdriver head is positioned in a state where the expandable limiting member is restrained by the restraining edge and presents an anti-falling state, and the pressure-controlled end is in a state where no force is applied and pressure-controlled; and when the inline When the sliding sleeve is in the second position, the pressure control end is pressed to control the displacement, forming each full pressing block to force the expandable limiter away from the restraining edge and continue toward the limiter. The displacement of the expansion slot causes the expandable limiting member to break away from the clamping edges of the screwdriver head, thereby forming a released state of the screwdriver head. The end-operated screwdriver bit quick release device as claimed in claim 1, wherein the radial surface width of the connecting walls is relatively smaller than the radial surface width of each of the fully pressed blocks. The end-operated screwdriver bit quick release device as described in claim 1, wherein a magnetic seat is installed inside the polygonal slot, and an elastic element is supported between the magnetic seat and the assembly section to facilitate insertion. The screwdriver head placed in the polygonal slot generates an elastic pushing force. The end-operated screwdriver bit quick release device according to claim 1, wherein the perforation of the inner cylinder part is further formed with a material-free expanded edge corresponding to each corner part of the polygonal slot. The end-operated screwdriver bit quick release device as described in claim 1, wherein the tail end is formed with any one of the following functional types: a combination functional type or a control functional type. The end-operated screwdriver bit quick release device as described in claim 1, wherein the pressure control end is in an expanded diameter shape relative to the inner cylinder part, and the perforation of the inner cylinder part is in a polygonal outline. .

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