Rotary switch for power tools

Abstract

Rotary switch for power tools, comprising: • a housing (10) which has a first partial area (11), a feed area (12) and a second partial area (13) which are connected to one another, wherein an annular groove (14) is formed between the first partial area (11) and the second partial area (13), which is designed to match the feed area (12); • a spring element (20) which is placed on the intake area (12) and arranged in the annular groove (14), wherein the spring element (20) has a first end (21) and a second opposite end (22), wherein the first end (21) is fixedly attached to the housing (10); • at least one first electrode (30) which is fixedly mounted in the annular groove (14), wherein the first electrode (30) is located outside the spring element (20) which is arranged between the first electrode (30) and the intake region (12); • an outer ring (40) which is rotatably positioned on the intake region (12), the outer ring (40) being arranged outside the spring element (20) and the first electrode (30) and having an inner circumferential surface (41), the outer ring (40) being provided for rotational adjustment between a first position and a second position, the second end (22) of the spring element being fastened to the outer ring (40); • at least one second electrode (50) which is connected to the inner peripheral surface (41) of the outer ring (40); • a battery (60) electrically connected to the first electrode (30); and • a drive source (70) electrically connected to the battery (60) and the second electrode (50), wherein • in this way, the second electrode (50) and the first electrode (30) are not aligned with each other and there is an open circuit between the battery (60) and the power source (70) when the outer ring (40) is in the first position, wherein the first electrode (30) is electrically connected to the second electrode (50) when the outer ring (40) is in the second position and the battery (60) is connected to the power source (70).

Description

[Technical field]

[0001] The present invention relates to a power tool, in particular to a rotary switch of a power tool. [State of the art]

[0002] Push-button switches are commonly used as the operating mechanism for power tools, but this conventional design poses some safety concerns. The power tool remains in operation once the switch is pressed until manually turned off. This design allows for ease of use but also presents potential hazards. For example, there is a risk of damage to the tool or surrounding equipment, or injury to passersby if an operator rushes out of the work area without turning off the tool, which could lead to an unintentional collision between a running power tool and its surroundings.

[0003] Another serious design flaw is the common design of these push-button switches, which protrude from the grip surface, increasing the likelihood of accidental contact. In confined work environments, tools can be accidentally touched and activated, potentially leading to a dangerous situation. Given these safety considerations, there is a clear need for improvements to existing push-button switches to increase the safety and reliability of tool use. [Tasks of the minor technical invention]

[0004] The present invention provides a rotary switch for power tools whose main function is to prevent accidental contact or to enable automatic switching off in order to increase safety.

[0005] To achieve this, the present invention provides a rotary switch for power tools comprising the following elements.

[0006] One of the elements is a housing comprising a first section, a feed section, and a second section that are connected to each other. An annular groove is formed between the first section and the second section, which is designed to fit the feed section.

[0007] One of the elements is a spring element, which is placed on the intake area and positioned in the annular groove. The spring element has a first end and an opposite second end, with the first end being firmly attached to the housing.

[0008] One of the elements is a first electrode, which is firmly mounted in the annular groove. The first electrode is located outside the spring element, which is arranged between the first electrode and the intake area.

[0009] One of the elements is an outer ring, which is rotatably positioned on the intake area. The outer ring is arranged outside the spring element and the first electrode and has an inner circumferential surface. The outer ring is provided for rotational adjustment between a first position and a second position, with the second end of the spring element being attached to the outer ring.

[0010] One of the elements is a second electrode, which is connected to the inner circumferential surface of the outer ring.

[0011] One of the elements is a battery, which is electrically connected to the first electrode.

[0012] One of the elements is also a power source, which is electrically connected to the battery and the second electrode.

[0013] In this way, when the outer ring is in the first position, the second electrode and the first electrode are not aligned, and an open circuit exists between the battery and the power source. When the outer ring is in the second position, the first electrode is electrically connected to the second electrode, and the battery is connected to the power source.

[0014] As can be seen from the above, the present invention ensures the electrical circuit between the battery and the power source primarily by ensuring that the second electrode radially overlaps or corresponds in position to the first electrode when the outer ring is rotated with some force, allowing the second electrode to be displaced relative to the first electrode, and providing a restoring force through the spring element. When the outer ring is released, the spring element moves the second electrode along with it, ensuring that the second electrode and the first electrode become misaligned, creating an open circuit between the battery and the power source. This ensures that the power tool is turned off. [Brief description of the drawings] Fig. 1 Exploded view of the rotary switch for power tools according to the invention Fig. 2 Spatial schematic view of the rotary switch for power tools according to the invention Fig. 3 Sectional view of the rotary switch for power tools according to the invention Fig. 4 Sectional view of the rotary switch for power tools according to the invention from a different perspective Fig. 5 Spatial schematic view of the rotary switch for power tools according to the invention Fig. 6 Sectional view of the rotary switch for power tools according to the invention Fig. 7 Sectional view of the rotary switch for power tools according to the invention from a different perspective Fig. 8 Schematic circuit diagram of the rotary switch for power tools according to the invention [Ways of carrying out the invention]

[0015] The present invention provides, as in Fig. 1 to 8, a rotary switch for power tools, which comprises the following elements.

[0016] One of the elements is a housing 10, which has a first section 11, a feed section 12, and a second section 13, which are connected to one another in the order mentioned. The cross-section of the first section 11 and the second section 13 is larger than that of the feed section 12. Between the first section 11 and the second section 13, an annular groove 14 is formed, which is designed to fit the feed section 12.

[0017] One of the elements is a spring element 20, which is placed on the intake area 12 and arranged in the annular groove 14. The spring element 20 can be designed as a spiral spring. The spring element 20 has a first end 21 and a second opposite end 22, with the first end 21 being fixedly attached to the housing 10. In this embodiment, the first end 21 is inserted into the intake area 12.

[0018] One of the elements is a first electrode 30, which is firmly attached in the annular groove 14. The first electrode 30 is located outside the spring element 20, which is arranged between the first electrode 30 and the intake region 12. According to a preferred embodiment, the housing 10 has a first inner end surface 15 and a second inner end surface 16 that face each other, wherein the first inner end surface 15 and the second inner end surface 16 are arranged on opposite sides of the annular groove 14. The first inner end surface 15 and the second inner end surface 16 are annular. The first inner end surface 15 is located at one end of the first section 11, where it is connected to the intake region 12, and the second inner end surface 16 is located at one end of the second section 13, where it is connected to the intake region 12.One end of the first electrode 30 is inserted into the first inner end surface 15, and the other end of the first electrode 30 is inserted into the second inner end surface 16. As a result, the first electrode 30 is firmly mounted in the annular groove 14.

[0019] One of the elements is an outer ring 40, which is rotatably positioned on the intake area 12. The outer ring 40 is arranged outside the spring element 20 and the first electrode 30 and has an inner peripheral surface 41 and an outer opposing peripheral surface 42. The inner peripheral surface 41 is spaced from the intake area 12. The outer ring 40 has a surface 43 and an opposing lower surface 44, wherein the surface 43 abuts the first inner end surface 15 and the lower surface 44 abuts the second inner end surface 16. The outer ring 40 is provided for rotational adjustment between a first position and a second position and is normally in the first position. The second end 22 of the spring element 20 is attached to the outer ring 40, whereby the second end 22 can move with the outer ring 40.According to a preferred embodiment, the peripheral surface 42 has a plurality of projections 421 which are spaced apart from one another, whereby an operator can securely hold the outer ring 40.

[0020] One of the elements is a second electrode 50, which is connected to the inner peripheral surface 41 of the outer ring 40. The number of second electrodes 50 corresponds to the number of first electrodes 30. According to one embodiment, the number of first electrodes 30 and second electrodes 50 is four each, with the second electrodes 50 being spaced apart from one another and attached to the inner peripheral surface 41.

[0021] One of the elements is, as in Fig. 8, further comprises a battery 60 which is located in the housing 10 and is electrically connected to the first electrode 30.

[0022] One of the elements is a drive source 70, which is located in the housing 10 and is electrically connected to the battery 60 and the second electrode 50. According to one embodiment, the drive source 70 is embodied as a motor.

[0023] As in the Fig. As shown in Figures 2 to 4, the second electrode 50 and the first electrode 30 are not aligned with each other when the outer ring 40 has not yet been rotated and is in the first position. The spring element 20 is in a non-compressed or non-extended state. At this time, an open circuit exists between the battery 60 and the power source 70.

[0024] As in the Fig.As shown in Figures 5 to 7, the second electrode 50 radially overlaps or corresponds in position to the first electrode 30 when the outer ring 40 is rotated and in the second position. As a result, the first electrode 30 is electrically connected to the second electrode 50, and the spring element 20 is in a compressed or expanded state. At this time, the battery 60 is connected to the power source 70, thereby activating the power source 70.

[0025] When the outer ring 40 is released, the spring element 20 moves the second electrode 40 back to the first position, ensuring that the second electrode 50 and the first electrode 30 are not aligned. This creates an open circuit between the battery 60 and the power source 70, ensuring that the power tool is turned off.

[0026] As can be seen from the foregoing, the present invention ensures the electrical circuit between the battery 60 and the power source 70 primarily by ensuring that the second electrode 50 radially overlaps or corresponds in position to the first electrode 30 when the outer ring 40 is rotated with some force, by allowing the second electrode 50 to be displaced relative to the first electrode 30, and by providing a restoring force through the spring element 20. When the outer ring 40 is released, the spring element 20 moves the second electrode 50 along with it, ensuring that the second electrode 50 and the first electrode 30 are not aligned, creating an open circuit between the battery 60 and the power source 70. This ensures that the power tool is turned off.

[0027] The present invention provides a rotary switch for power tools that ensures the electrical circuit between the battery and the power source primarily by ensuring that the second electrode radially overlaps or corresponds in position to the first electrode when the outer ring is rotated with some force, by allowing the second electrode to be displaced relative to the first electrode, and by providing a restoring force through the spring element. When the outer ring is released, the spring element moves the second electrode along with it, ensuring that the second electrode and the first electrode are not aligned, creating an open circuit between the battery and the power source. This ensures that the power tool is turned off.

Claims

[1] Rotary switch for power tools, comprising: • a housing (10) which has a first partial area (11), a feed area (12) and a second partial area (13) which are connected to one another, wherein an annular groove (14) is formed between the first partial area (11) and the second partial area (13), which is designed to match the feed area (12); • a spring element (20) which is placed on the intake area (12) and arranged in the annular groove (14), wherein the spring element (20) has a first end (21) and a second opposite end (22), wherein the first end (21) is fixedly attached to the housing (10); • at least one first electrode (30) which is fixedly mounted in the annular groove (14), wherein the first electrode (30) is located outside the spring element (20) which is arranged between the first electrode (30) and the intake region (12); • an outer ring (40) which is rotatably positioned on the intake region (12), the outer ring (40) being arranged outside the spring element (20) and the first electrode (30) and having an inner circumferential surface (41), the outer ring (40) being provided for rotational adjustment between a first position and a second position, the second end (22) of the spring element being fastened to the outer ring (40); • at least one second electrode (50) which is connected to the inner peripheral surface (41) of the outer ring (40); • a battery (60) electrically connected to the first electrode (30); and • a drive source (70) electrically connected to the battery (60) and the second electrode (50), wherein • in this way, the second electrode (50) and the first electrode (30) are not aligned with each other and there is an open circuit between the battery (60) and the power source (70) when the outer ring (40) is in the first position, wherein the first electrode (30) is electrically connected to the second electrode (50) when the outer ring (40) is in the second position and the battery (60) is connected to the power source (70). [2] Rotary switch for power tools according to claim 1, characterized by that the cross-section of the first partial area (11) and the second partial area (13) is larger than that of the catchment area (12). [3] Rotary switch for power tools according to claim 1, characterized by that the spring element (20) is designed as a helical spring. [4] Rotary switch for power tools according to claim 1, characterized bythat the first end (21) is inserted in the intake area 12 and the second end (22) is fastened on the inner peripheral surface (41) of the outer ring (40). [5] Rotary switch for power tools according to claim 1, characterized by that the outer ring (40) has an outer peripheral surface 42 which is opposite the inner peripheral surface (41), wherein the outer peripheral surface (42) has a plurality of projections (421) which are spaced apart from one another. [6] Rotary switch for power tools according to claim 1, characterized byin that the housing (10) has a first inner end surface (15) and a second inner end surface (16) which face one another, the first inner end surface (15) being located at one end of the first partial region (11) where it is connected to the intake region (12), the second inner end surface (16) being located at one end of the second partial region (13) where it is connected to the intake region (12), one end of the first electrode (30) being inserted at the first inner end surface (15), the other end of the first electrode (30) being inserted at the second inner end surface (16), the outer ring (40) having a surface (43) and an opposite lower surface (44), the surface (43) being in contact with the first inner end surface (15) and the lower surface (44) being in contact with the second inner end surface (16). [7] Rotary switch for power tools according to claim 1, characterized bythat the number of second electrodes (50) corresponds to the number of first electrodes (30). [8] Rotary switch for power tools according to claim 1, characterized by that the number of first electrodes (30) and second electrodes (50) is four each, wherein the second electrodes (50) are spaced apart from one another and attached to the inner peripheral surface (41).

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