Magazine attachment with locking unit

Abstract

The invention discloses a magazine attachment, comprising a locking unit for locking the magazine attachment on a hand-held power tool, the locking unit having a knob for bringing the locking unit into a locked state or an unlocked state, a guide unit and a spring ring, wherein the spring ring surrounds an opening which is adapted to accommodate a locking section of the hand-held power tool and the knob is arranged rotatably relative to the guide unit.

Description

Technical Field

[0001] This invention relates to a cartridge accessory, comprising a locking unit for securing the cartridge accessory to a handheld machine tool, particularly a drywall screwdriver. Furthermore, this invention also relates to an apparatus. Background Technology

[0002] Motor-driven screwdrivers are already known and can be connected to a cartridge attachment. Typically, such handheld machine tools are equipped with a cartridge attachment to speed up the work. Such a device, consisting of a cartridge attachment and a handheld machine tool configured as a drywall screwdriver, can be used to create various threaded connections. For this purpose, the cartridge attachment enables automated screw re-pushing, and the screw can be easily and simply introduced into the building material guided by a guide.

[0003] The cartridge attachment is typically connected to the hand-held power tool via a locking connection. Here, for example, a spring-loaded locking ball or locking pin can prevent the drywall screwdriver from becoming detached from the cartridge attachment.

[0004] However, a problem with current connectivity solutions is that the cartridge attachment can unintentionally detach from the handheld power tool during frequent use. Furthermore, current solutions do not provide indication of whether the cartridge attachment is in the locked or unlocked position, thus failing to allow for the removal of the handheld power tool from the cartridge attachment. Summary of the Invention

[0005] The objective of this invention can be considered as providing a cartridge attachment having a locking unit for a handheld machine tool, which displays a locked state and enables reliable locking of the handheld machine tool on the cartridge attachment.

[0006] This task is solved by means of the corresponding subject matter of a preferred embodiment of the invention. The advantageous design of the invention is the subject matter of the alternative technical solution.

[0007] According to one aspect of the invention, a cartridge accessory is provided, comprising a locking unit for locking the cartridge accessory onto a handheld power tool, particularly a drywall screwdriver. Furthermore, the locking unit has a knob for positioning the locking unit in a locked or unlocked state. Additionally, the locking unit has a guide unit and a spring coil, wherein the spring coil surrounds an opening adapted to receive a locking section of the handheld power tool, and the knob is rotatably disposed relative to the guide unit.

[0008] Preferably, the spring coil extends on its end side through the guide slot of the guide unit and leads to at least one receiving section of the knob. Here, the spacing between the end sections of the spring coil can be changed by operating the knob and subsequently by rotating the knob relative to the guide unit.

[0009] The opening can be enlarged or reduced by changing the spacing between the end sections. In particular, the opening formed by the spring coil can be narrowed or widened so as to mechanically interact, for example, with the slot of the cartridge attachment and with the slot of the hand-held machine tool.

[0010] For example, in the case of a hopper accessory, the rotation of a knob accessible to the user can achieve clear signaling and error-free setting of the locking or unlocking state of the locking unit. In particular, the knob can be in the unlocked position to enable the locking unit to be unlocked and in the locked position to enable the locking unit to be locked.

[0011] In the unlocked state, the spring coil can be designed to be undeformed and, for example, form a circular or elliptical opening. The spring coil is then inserted into the receiving section of the knob in a torsion-resistant manner. If the knob is twisted relative to the guide unit, the spring coil also twists at its end, thereby deforming the spring coil.

[0012] For example, the spring coil can form a smaller or narrower opening in the deformed or locked state compared to the unlocked state. Such a locking mechanism enables reliable locking, which provides robust locking even under frequent use.

[0013] The locking state is changed by rotating the knob. This control of the locking unit provides a clear indication of the locking state.

[0014] In one embodiment, the receiving section of the knob is configured as an elongated slot with a length that substantially corresponds to the length of the guide slot of the guide unit. With this arrangement, the spring coil can be rotated and subsequently deformed by twisting the knob at the end with very little force.

[0015] The end portion of the spring coil can slide guidedly within the receiving portion of the knob.

[0016] According to another embodiment, the knob can be connected to the guide unit in a form-fitting manner via at least two locking hooks disposed on the knob and / or the guide unit, wherein the locking hooks are designed as guides for relative rotational movement between the knob and the guide unit. The locking hooks of the knob can here at least partially surround the guide unit and thus form a rotatable connection.

[0017] According to the design of the locking unit, the guide unit may have a locking hook that surrounds the knob on the outside and thus serves as a guide for the knob.

[0018] By using a locking hook, the knob can be easily connected to the guide unit. An exemplary design of the locking unit is mentioned here, in which the guide unit has a locking hook. Other designs are also possible, which connect the knob to the guide unit.

[0019] According to another embodiment, the rotation angle of the knob is limited by at least one slot, a recess, and / or by at least one stop. This measure limits the rotation of the knob to a predetermined angular range, thus preventing "over-rotation" of the spring coil. Furthermore, this provides the user of the locking unit with feedback regarding the locked or unlocked state of the locking unit.

[0020] In another embodiment, the locking hook extends axially or radially into the slot or remains in the air. Thus, the locking hook, in addition to guiding the rotational movement of the knob, also serves a limiting function. This limiting restricts the angular range available for the rotation of the knob.

[0021] According to another embodiment, the receiving section of the knob has a centered or centrally located opening for receiving and locking the spring coils at its ends in the locked state of the locking unit. If the knob is rotated from the unlocked position to the locked position, for example by a 90° rotation, the end sections of the spring coils can slide along the receiving section of the knob until they engage in the opening. Preferably, the end sections of the spring coils can generate a spring force pointing away from the rotation axis of the knob. This spring force causes the end sections to press and separate against each other within the receiving section.

[0022] In another embodiment, the knob is designed as a torsion bar or a torsion cap. This allows for a wide variety of knob designs. Alternatively or additionally, the knob can have a lever or lever-type marking to indicate the locking status. In this way, the knob can function as an indicator showing whether the locking unit is in the locked or unlocked position.

[0023] In another embodiment, a spring coil applies a spring force, wherein the spring force of the spring coil is radially opposite to the rotation axis of the knob. This causes the spring coil to tend towards the unlocked position. Operating the knob causes the spring coil to deform against its spring force, thereby moving the knob to the locked position and changing the opening of the spring coil.

[0024] According to another aspect of the invention, an apparatus is provided. The apparatus includes a cartridge attachment and a handheld power tool capable of being connected to the cartridge attachment. The handheld power tool can be specifically designed as a drywall screwdriver. The cartridge attachment has a locking unit for locking the handheld power tool.

[0025] By employing the locking unit, the handheld machine tool can be reliably connected to the cartridge attachment. The locking unit's knob provides information on its locking status, preventing accidental disengagement.

[0026] In one embodiment, the locking unit is inserted into the housing of the cartridge accessory transversely to the working direction of the handheld power tool, wherein the spring coil of the locking unit circumferentially surrounds the receiving space at the end side of the cartridge accessory. The handheld power tool can be inserted into the receiving space of the cartridge accessory at the end side in the working direction such that the spring coil, in the unlocked state of the locking unit, circumferentially surrounds the locking section of the handheld power tool. This allows the handheld power tool to be inserted into the receiving space without obstruction because the spring coil, in the unlocked state, presses against the receiving space radially outward due to its spring force.

[0027] According to another embodiment, by placing the locking unit in the locked state, the interval between the end segments of the spring coil can be changed, causing the opening formed by the spring coil to deform. In this locked state, the locking section of the handheld power tool can be locked in the working direction via the spring coil and the receiving space of the cartridge accessory. The receiving space of the cartridge accessory is changed by the deformation of the spring coil. In particular, the receiving space can be narrowed along at least one spatial direction, so that the spring coil, in the locked state, partially interacts with the locking section of the handheld power tool and partially conforms to the shape of the receiving space. This allows for a technically simple and reliable connection between the handheld power tool and the cartridge accessory.

[0028] According to another embodiment, the locking unit is laterally secured to the cartridge accessory via a guide unit. The guide unit can be disposed on any surface of the cartridge accessory's housing. For example, the guide unit can be screwed or snapped onto the cartridge accessory. The guide slot of the guide unit extends through the housing into the receiving space, thus accommodating the end section of the spring coil. This allows a knob to be placed on or in the guide unit so that the locking state is set by deformation of the spring coil. Attached Figure Description

[0029] Preferred embodiments of the invention are further illustrated below with reference to extremely simplified schematic diagrams. Here:

[0030] Figure 1 , 2 : A perspective view of the locking unit in the unlocked state according to one embodiment;

[0031] Figure 3 , 4 : A perspective view of the locking unit in the locked state according to one embodiment;

[0032] Figure 5 : A schematic cross-sectional view of the receiving section and guide gap in the unlocked state;

[0033] Figure 6 : A schematic cross-sectional view of the receiving section and guide gap in the locked state;

[0034] Figure 7-9 Perspective view of the components of a locking unit according to one embodiment;

[0035] Figure 10 A side view of an embodiment of the device; and

[0036] Figure 11 : A perspective view of a cartridge accessory having a locking unit according to one embodiment;

[0037] Figure 12 : A handheld tool designed as a drywall screwdriver. Detailed Implementation

[0038] Figure 1 and Figure 2 A perspective view of the locking unit 1 in the unlocked state according to one embodiment is shown. According to the illustrated embodiment, the locking unit 1 is used to lock a handheld tool designed as a drywall screwdriver onto a cartridge attachment. Figure 10 , Figure 11 and Figure 12 The material box accessory is described in detail below.

[0039] The locking unit 1 has a knob 2 for placing the locking unit 1 in a locked or unlocked state. For this purpose, the knob 2 can be rotated along the rotation axis D between the unlocked and locked positions within an exemplary 90° angular range.

[0040] The knob 2 is shaped to fit the guide unit 4. Here, the knob 2 is connected to the guide unit 4 such that the knob 2 can rotate relative to the guide unit 4 along the axis of rotation D. For this purpose, the knob 2 has two locking hooks 6 that protrude from the guide unit 4 along the axis of rotation D and surround the guide unit 4 on the rear and circumferential sides.

[0041] The guide unit 4 has a circular guide section 8 for guiding the rotational movement of the knob 2. Two slots 10 are introduced into the rear side of the guide section 8 of the guide unit 4, and the locking hook 6 of the knob 2 extends axially into the slots 10 relative to the rotation axis D. These slots 10, in addition to locking the knob 2 on the guide section 8 of the guide unit 4, also limit the available angular range.

[0042] The guide section 8 of the guide unit 4 extends in the middle along the rotation axis D of the knob 2 into the cylindrical fixing section 12, which can extend into the housing of the cassette accessory to fix the knob 2 to the cassette accessory.

[0043] The knob 2 has a receiving section 14 for accommodating the end section 16 of the spring coil 18. Here, the end section 16 of the spring coil 18 passes through the guide slot 20 of the guide unit 4 and enters the receiving section 14 of the knob 2.

[0044] The end segments 16 of the spring coil 18 can slide within the receiving segment 14, thereby changing the spacing A between them. In the illustrated embodiment, the end segments 16 are pressed apart by a spring force F, thus separating them from each other. Here, the end segments 16 can be pressed together to reduce the spacing A.

[0045] In the illustrated embodiment, the guide slot 20 of the guide unit 4 has a shape and size that substantially correspond to the shape and size of the receiving section 14 of the knob 2. The guide slot 20 extends through the guide section 8 and the fixing section 12 of the guide unit 4.

[0046] In the unlocked or unlocked position of knob 2, the guide slot 20 and the receiving section 14 are substantially aligned with each other. If knob 2 is rotated to the locked position, the two end sections 16 of spring coil 18 move in the direction of the rotation axis D.

[0047] A spring coil 18 surrounds the opening 22 on its circumferential side. The opening 22 does not deform in the unlocked state. By placing the locking unit 1 in the locked state, the opening 22 deforms and narrows along at least one spatial direction E. This deformation of the opening 22 is achieved by changing the interval A between the two end segments 16 of the spring coil 18.

[0048] Figure 3 and Figure 4 A perspective view of the locking unit 1 in the locked state according to one embodiment is shown. As described above, the shape of the opening 22 of the spring coil 18 is changed by placing the knob 2 in the locked position. Here, the opening 22 is narrowed E, which can be used for locking.

[0049] The lever section 24 of knob 2 is used as an indicator of the locking state of locking unit 1. By adjusting this lever section, the user of the locking unit can check and set the locking state without errors.

[0050] exist Figure 5 The diagram shows a schematic cross-sectional view of the receiving section 14 and the guide slot 20 in the unlocked state. In the unlocked state of the locking unit 1, the guide slot 20 of the guide unit 4 coincides with the receiving section 14 of the knob 2. The end sections 16 of the spring coil 18 are pressed away from the rotation axis D of the knob 2 by the spring force F of the spring coil 18. Thus, the end sections 16 of the spring coil 18 have a maximum spacing A between them.

[0051] Furthermore, it is clarified that the receiving section 14 of the knob 2 has two openings 26 located in the middle. Therefore, in Figure 6 The diagram shows a schematic cross-sectional view of the receiving section 14 and the guide slot 20 in the locked state, illustrating the function of the recess 26. Rotating the knob 2 to the locked position causes the end section 16 of the spring coil 18 to move axially relative to the axis of rotation D.

[0052] When the locking position is reached, the end section 16 can be inserted into and locked into the recess 26 on the side of the receiving section 14 by the spring force F of the spring coil 18. This provides fixation for the locking unit 1, which prevents the locking unit 1 from automatically loosening or changing its locked state.

[0053] The arrows illustrate the movement of the end segment 16 of the spring coil 18 as the knob 2 is rotated from the unlocked position to the locked position.

[0054] exist Figure 7 , Figure 8 and Figure 9 The diagram shows perspective views of the components of a locking unit 1 according to one embodiment, in order to illustrate the structure of the locking unit 1. Figure 7 A knob 2 is shown, including a lever section 24 for indicating the locked state of the locking unit 1. Figure 8 The text describes a guide unit 4 having a guide section 8 and a fixed section 12. Figure 9 The spring coil 18 in its disassembled state is shown. The two end segments 16 of the spring coil 18 and the opening 22 forming the spring coil 18 are explained here.

[0055] Figure 10 A side view of an apparatus 30 according to one embodiment is shown. The apparatus 30 has a cartridge attachment 32 and a handheld tool 34. The handheld tool 34 has a locking section 36 that extends into the cartridge attachment 32. The handheld tool 34 can be temporarily connected to the cartridge attachment 32 via a locking unit 1 on the locking section 36. For this purpose, the locking section 36 may have, for example, a groove or cutout that can mechanically interact with a spring coil 18.

[0056] To illustrate the securing of the locking unit 1 to the cartridge accessory 32, the knob 2 is not shown. Details Figure 10 Figure A shows the guide section 8 of the guide unit 4, which is fixed to the cartridge attachment 32 by means of two screws 28. The receiving section 14 of the knob 2 passes through the cartridge attachment 32 and enters the receiving space 38 of the cartridge attachment 32. The receiving space of the cartridge attachment is... Figure 11 The perspective view is used to illustrate this.

[0057] Knob 2 is positioned in the locked position. In the unlocked state, the opening 22 of the spring coil 18 substantially coincides with the cross-section of the receiving space 38. To facilitate easy placement of the handheld power tool 34 into the receiving space 38, the spring coil 18 extends into the slot 40 of the receiving space 38. Rotating the knob 2 to the locked position narrows the opening 22 of the spring coil 18, thereby causing the spring coil 18 to interact at least partially with the locking section 36 of the handheld power tool 34. This allows the handheld power tool 34 to be coupled to the cartridge attachment 32. The narrowing of the opening 22 is caused by a reduction in the spacing A between the end sections 16 of the spring coil 18.

[0058] Therefore, the handheld power tool 34 is locked by rotating the knob 2 along the rotation axis D, which is perpendicular to the working direction R of the device 30.

[0059] In particular, the spring coil 18 can be tensioned by placing the knob 2 in the locked position, and the spring coil 18 can be relaxed by placing the knob 2 in the unlocked position.

[0060] Figure 12 A handheld power tool 34 configured as a drywall screwdriver is shown. The handheld power tool 34 has a handle 58 that extends at an angle, at least approximately perpendicular, relative to the main extension direction of the handheld power tool 34 and is configured for a user to grip and guide or operate the handheld power tool 34 in operation. The handle 58 is formed as a part of the housing 50 of the handheld power tool 34. The handheld power tool 34 also has a switching element 52 movably supported within the housing 50 and configured to activate a drive unit 54 of the handheld power tool 34. Furthermore, the handheld power tool has a receiving unit for accommodating a battery unit 56. The handheld power tool 34 also includes a tool receiving section 57 configured to accommodate a plug-in tool 60 and hold the plug-in tool in operation.

Claims

1. A cartridge accessory comprising a locking unit (1) for locking the cartridge accessory (32) onto a handheld machine tool (34), the locking unit having: a knob (2) for engaging or disengaging the locking unit (1); a guide unit (4); and a spring coil (18), wherein, The spring coil (18) surrounds an opening (22) of a locking section (36) suitable for receiving a handheld machine tool (34), and the knob (2) is rotatably disposed relative to the guide unit (4).

2. The hopper accessory according to claim 1, wherein, The spring coil (18) extends at its end through the guide slot (20) of the guide unit (4) and leads to at least one receiving section (14) of the knob (2), wherein the interval (A) between the end sections (16) of the spring coil (18) can be changed by manipulating the knob (2).

3. The hopper accessory according to claim 1 or 2, wherein, The receiving section (14) of the knob (2) is configured as an elongated groove and has a length, wherein the length of the receiving section (14) of the knob (2) substantially corresponds to the length of the guide slot (20) of the guide unit (4).

4. The hopper accessory according to claim 1 or 2, wherein, The knob (2) can be connected to the guide unit (4) in a shape-fitting manner by at least two hooks (6) provided on the knob (2) and / or the guide unit (4), wherein the hooks (6) are designed as guides for relative rotational movement between the knob (2) and the guide unit (4).

5. The hopper accessory according to claim 1 or 2, wherein, The rotation angle of the knob (2) is limited by at least one slot (10), a gap and / or by at least one stop.

6. The hopper accessory according to claim 5, wherein, The locking hook (6) extends axially or radially into the slot (10) or remains in the air relative to the rotation axis (D) of the knob (2).

7. The cassette accessory according to any one of claims 1, 2, and 6, wherein, The receiving section (14) of the knob (2) has a centrally located opening (26) for receiving and locking the spring coil (18) at the end when the locking unit (1) is in the locked state.

8. The hopper accessory according to any one of claims 1, 2, and 6, wherein, The knob (2) is designed as a torsion bar or a torsion cap.

9. The cassette accessory according to any one of claims 1, 2, and 6, wherein, The spring coil (18) applies a spring force (F), wherein the spring force (F) of the spring coil (18) is radially away from the rotation axis (D) of the knob (2).

10. An apparatus (30) having a hopper attachment (32) according to any one of the preceding claims and a handheld machine tool (34) capable of being connected to the hopper attachment (32).

11. The apparatus according to claim 10, wherein, The locking unit (1) is placed transversely to the working direction (R) of the handheld power tool (34) into the housing of the cartridge accessory (32), wherein the spring coil (18) of the locking unit (1) surrounds the receiving space (38) of the end side of the cartridge accessory (32) on the circumferential side, wherein the handheld power tool (34) can be placed in the receiving space (38) of the cartridge accessory (32) on the end side in such a way that the spring coil (18) surrounds the locking section (36) of the handheld power tool (34) on the circumferential side when the locking unit (1) is in the unlocked state.

12. The apparatus according to claim 10 or 11, wherein, By placing the locking unit (1) in the locked state, the interval (A) between the end segments (16) of the spring coil (18) can be changed so that the opening (22) of the spring coil (18) is deformed. In this way, by placing the locking unit (1) in the locked state, the locking segment (36) of the handheld machine tool (34) can be locked in the working direction (R) by means of the spring coil (18) and the receiving space (38) of the hopper accessory (32).

13. The apparatus according to claim 10 or 11, wherein, The locking unit (1) is fixed to the hopper accessory (32) by the guide unit (4).

14. The apparatus according to claim 10, wherein, The handheld tool (34) is constructed as a drywall screwdriver.

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