Electric tool self-locking switch and electric tool

Abstract

The invention discloses an electric tool self-locking switch and an electric tool, and relates to the field of small electric tools, the electric tool self-locking switch comprises a shell, a trigger movably arranged on the shell and a safety piece rotationally arranged on the shell, a switch body triggered by the trigger is arranged in the shell, the trigger comprises a first abutting part and a first clamping part, and the first abutting part is connected with the first clamping part. The safety piece is provided with a second abutting part and a second clamping part. The safety piece comprises an abutting position and a continuous triggering position, the safety piece is switched between the abutting position and the continuous triggering position through rotation, and when the safety piece is located at the abutting position, the first abutting portion abuts against the second abutting portion, and the trigger cannot trigger the switch body; when the safety piece reaches the continuous triggering position, the second abutting part and the first abutting part are staggered, the second clamping part and the first clamping part are clamped, and the trigger continuously triggers the switch body. The electric tool adopts the electric tool self-locking switch. The electric tool has the advantages that the safety coefficient is high, and starting of the electric tool caused by mistaken touch is not prone to occurring.

Description

Technical Field

[0001] The invention relates to the field of small electric tools, and in particular to an electric tool self-locking switch and an electric tool. Background Art

[0002] Existing small electric tools such as angle grinders are increasingly used, but the start switch of such small electric tools needs to have an anti-lock mechanism to prevent the tool from starting when the switch trigger is accidentally touched, causing harm to personnel. Existing small electric tools are all designed with a safety piece. When the switch trigger is pressed alone, the switch trigger cannot be pressed due to the obstruction of the safety piece, and the electric tool cannot be triggered to work. Only when the safety piece is pressed, the safety piece slides in the housing to avoid the switch trigger pressing position, and then the switch can be triggered by pressing the switch trigger, and the electric tool can work.

[0003] Since at least one end of the existing safety part extends out of the shell and is unlocked by sliding, it generally does not need to overcome too much resistance when sliding. Due to the heavy weight of the power tool, if the power tool is placed on the ground, it is possible to press the safety part, making the safety part in an unlocked state, causing the safety part to lose its safety function, and there is still a certain safety hazard. Summary of the invention

[0004] The object of the present invention is to provide a self-locking switch for an electric tool and an electric tool, which can effectively solve the problem of low safety factor of existing safety parts.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] A self-locking switch for an electric tool comprises a housing, a trigger movably arranged on the housing, and a safety piece rotatably arranged on the housing, a switch body triggered by the trigger is arranged in the housing, the trigger comprises a first abutting portion and a first clamping portion, and the safety piece is provided with a second abutting portion and a second clamping portion;

[0007] The safety piece includes an abutment position and a continuous triggering position. The safety piece switches between the abutment position and the continuous triggering position by rotating. When the safety piece is at the abutment position, the first abutment portion abuts against the second abutment portion, and the trigger cannot trigger the switch body; when the safety piece reaches the continuous triggering position, the second abutment portion is misaligned with the first abutment portion, the second clamping portion is clamped against the first clamping portion, and the trigger continuously triggers the switch body.

[0008] In the above-mentioned self-locking switch of the electric tool, the safety member is spirally arranged on the housing, one of the side wall of the safety member and the housing is provided with a spiral portion, and the other is provided with a guide portion cooperating with the spiral portion.

[0009] In the above-mentioned electric tool self-locking switch, the spiral portion is arranged on the outer peripheral wall of the safety element and protrudes from the side wall of the safety element. The spiral portion includes a first spiral surface and a second spiral surface arranged opposite to each other. Two guide portions are provided on the shell, which respectively abut the first spiral surface and the second spiral surface.

[0010] In the above-mentioned self-locking switch of the electric tool, the guide portion is a guide block, and the guide portion protrudes from the housing toward the direction of the spiral portion.

[0011] In the above-mentioned self-locking switch of the electric tool, the guide portion is a first spiral groove provided on the housing, and the first spiral groove is matched with the spiral portion.

[0012] In the above-mentioned electric tool self-locking switch, the spiral portion is a second spiral groove and is arranged on the outer peripheral wall of the safety element, and the guide portion is arranged on the housing and protrudes from the housing toward the spiral portion.

[0013] In the above-mentioned electric tool self-locking switch, the spiral portion is a third spiral groove and is arranged on the outer peripheral wall of the safety component, the guide portion is a fourth spiral groove and is arranged at a position on the shell corresponding to the third spiral groove, the third spiral groove and the fourth spiral groove are combined into a guide groove, and a ball is arranged in the guide groove.

[0014] In the above-mentioned self-locking switch of the electric tool, both the first clamping portion and the second clamping portion are hooks; or, one of the first clamping portion and the second clamping portion is a clamping groove, and the other is a clamping block.

[0015] In the above-mentioned self-locking switch of the electric tool, a first elastic reset member is further provided between the safety member and the housing, and the first elastic reset member drives the safety member to rotate from the continuous triggering position to the abutting position.

[0016] An electric tool adopts any one of the above electric tool self-locking switches.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] By rotating the safety part on the housing, the problem of low safety factor of the current safety part is solved. Since the safety part is rotatably arranged on the housing, it cannot be driven to rotate by axial force, or under the same conditions, a larger axial force is required than the sliding safety part to drive the safety part to rotate. Therefore, the safety factor of the rotating safety part is much higher than that of the sliding safety part. When the safety part is in the abutting position, the first abutting part and the second abutting part abut each other. At this time, when the trigger is pressed, the trigger will not have enough stroke to trigger the switch body. When the safety part is in the continuous triggering position, the second abutting part is misaligned with the first abutting part, which will not hinder the first abutting part from moving with the trigger. The trigger also has enough stroke to trigger the switch body. At the same time, the second clamping part is clamped with the first clamping part, so that the trigger continues to maintain the state of triggering the switch body, and the user can continuously use the electric tool to work without continuously pressing the trigger. In addition, due to the split structure of the trigger and the switch body, the switch has strong interchangeability and adaptability, and the size of the trigger is easy to adjust to adapt to product shape and constantly updated safety standards.

[0019] Furthermore, the safety piece is spirally arranged on the housing, and one of the side wall of the safety piece and the housing is provided with a spiral portion, and the other is provided with a guide portion that cooperates with the spiral portion. The safety piece is spirally arranged on the housing, and in addition to being driven to rotate by rotating the safety piece, it can also be driven to rotate by pressing, and the driving methods are diversified, and a guide portion is provided to cooperate with the spiral portion to ensure that the safety piece can rotate around its own axis.

[0020] Furthermore, the spiral portion is arranged on the outer peripheral wall of the safety part and protrudes from the side wall of the safety part, and the spiral portion includes a first spiral surface and a second spiral surface arranged opposite to each other, and the shell is provided with two guide portions that respectively abut against the first spiral surface and the second spiral surface. The two guide portions are arranged on the shell to cooperate with the two spiral surfaces of the spiral portion. On the one hand, it can ensure that the spiral portion can be limited by the guide portions in both forward and reverse rotation to maintain the rotation posture. On the other hand, the guide portions are arranged separately, which can also facilitate the manufacture of the shell, reduce the difficulty of shell manufacturing, and make the distribution of the internal parts of the shell more flexible. The two guide portions can be arranged separately, and there are not too many requirements for the relative positions.

[0021] Furthermore, the guide portion is a guide block, and the guide portion protrudes from the housing toward the spiral portion. The protruding guide block cooperates with the protruding spiral portion to reduce the difficulty of assembly.

[0022] Furthermore, the guide part is a first spiral groove provided on the housing, and the first spiral groove is adapted to the spiral part. In another guide part structure, the guide part is a spiral groove provided on the housing, and the spiral groove cooperates with the protruding spiral part to increase the contact area between the spiral groove and the spiral part, so that the safety part is more stable when rotating.

[0023] Furthermore, the spiral portion is a second spiral groove and is arranged on the outer peripheral wall of the safety element, and the guide portion is arranged on the housing and protrudes from the housing toward the spiral portion. Another structural form of the spiral portion can also achieve the purpose of allowing the safety element to rotate spirally, and the guide portion protrudes from the housing to facilitate the guide portion extending into the second spiral groove to guide the safety element to rotate stably around its own axis.

[0024] Furthermore, the spiral portion is a third spiral groove and is arranged on the outer peripheral wall of the safety member, the guide portion is a fourth spiral groove and is arranged at a position on the shell corresponding to the third spiral groove, the third spiral groove and the fourth spiral groove are combined into a guide groove, and a ball is arranged in the guide groove. The ball can not only limit the rotation trajectory of the safety member relative to the shell, but also reduce the resistance between the safety member and the shell during the rotation process.

[0025] Furthermore, the first clamping part and the second clamping part are both hooks; or, one of the first clamping part and the second clamping part is a slot and the other is a block. The first clamping part and the second clamping part adopt a hook structure, and when the two are clamped, they can maintain a long-term stable clamping state and are not easy to loosen when subjected to vibration; and the first clamping part and the second clamping part adopt a clamping groove and a clamping block to be clamped, which can simplify the structure of the clamping part, facilitate manufacturing, and the steps of clamping and contacting the clamping state are relatively simpler.

[0026] Furthermore, a first elastic reset member is provided between the safety member and the housing, and the first elastic reset member drives the safety member to switch from the continuous trigger position to the abutment position. After the first clamping portion and the second clamping portion are released from the clamping state by the first elastic reset member, the safety member can be restored to the abutment position, and it is no longer necessary to manually drive the safety member to switch from the continuous trigger position to the abutment position.

[0027] The present invention also discloses an electric tool using the above-mentioned electric tool self-locking switch in any direction, which has a self-locking function and avoids the user from pressing the trigger for a long time when continuous work is required, making the user operation more convenient, and the switch is not easily touched by mistake, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An exploded view of a first embodiment of a self-locking switch for an electric tool according to the present invention;

[0029] Figure 2 It is a structural schematic diagram of a trigger in Embodiment 1 of a self-locking switch for an electric tool of the present invention;

[0030] Figure 3 It is a structural schematic diagram of a safety element in a first embodiment of a self-locking switch for an electric tool of the present invention;

[0031] Figure 4 It is a structural schematic diagram of a first embodiment of a self-locking switch for an electric tool of the present invention, in which the safety element is connected to the trigger when the safety element is in a continuous triggering position;

[0032] Figure 5 It is a structural schematic diagram of a first embodiment of a self-locking switch for an electric tool of the present invention, in which the safety element is in the abutting position and is connected to the trigger;

[0033] Figure 6 It is a structural schematic diagram of an electric tool of the present invention;

[0034] Figure 7 An exploded view of a safety member and a housing in a second embodiment of a self-locking switch for an electric tool according to the present invention;

[0035] Figure 8 An exploded view of the safety element and the housing in Embodiment 3 of a self-locking switch for an electric tool according to the present invention;

[0036] Fig. 9 An exploded view of the safety element and the housing in a fourth embodiment of a self-locking switch for an electric tool according to the present invention;

[0037] Fig.10 This is a schematic structural diagram of a safety element and a housing in a fifth embodiment of a self-locking switch for an electric tool according to the present invention.

[0038] The accompanying drawings are marked as follows:

[0039] The housing 10, the guide portion 11, the trigger 20, the first abutting portion 21, the first clamping portion 22, the safety member 30, the second abutting portion 31, the second clamping portion 32, the spiral portion 33, the first spiral surface 331, the second spiral surface 332, the switch body 40, the ball 50, the first elastic return member 60, the second elastic return member 70, and the pressing cap 80. DETAILED DESCRIPTION

[0040] A self-locking switch for an electric tool comprises a housing 10, a trigger 20 movably arranged on the housing 10, and a safety piece 30 rotatably arranged on the housing 10, wherein a switch body 40 triggered by the trigger 20 is arranged in the housing 10, the trigger 20 comprises a first abutting portion 21 and a first clamping portion 22, and a second abutting portion 31 and a second clamping portion 32 are arranged on the safety piece 30; the safety piece 30 comprises an abutting position and a continuous triggering position, and the safety piece 30 switches between the abutting position and the continuous triggering position by rotating, when the safety piece 30 is located at the abutting position, the first abutting portion 21 abuts against the second abutting portion 31, and the trigger 20 cannot trigger the switch body 40; when the safety piece 30 reaches the continuous triggering position, the second abutting portion 31 is misaligned with the first abutting portion 21, the second clamping portion 32 clamps against the first clamping portion 22, and the trigger 20 continuously triggers the switch body 40.

[0041] By rotatably setting the safety member 30 on the housing 10, the problem of low safety factor of the current safety member 30 is solved. Since the safety member 30 is rotatably set on the housing 10, it cannot be driven to rotate when subjected to axial force, or under the same conditions, a greater axial force is required to drive the safety member 30 to rotate than the sliding safety member 30. Therefore, the safety factor of the rotatably set safety member 30 is much higher than that of the sliding safety member 30. When the safety piece 30 is in the abutting position, the first abutting portion 21 and the second abutting portion 31 abut against each other. At this time, when the trigger 20 is pressed, the trigger 20 will not have enough travel to trigger the switch body 40. When the safety piece 30 is in the continuous triggering position, the second abutting portion 31 is misaligned with the first abutting portion 21, which will not hinder the first abutting portion 21 from moving with the trigger 20. The trigger 20 has enough travel to trigger the switch body 40. At the same time, the second clamping portion 32 is clamped with the first clamping portion 22, so that the trigger 20 continues to maintain the state of triggering the switch body 40. The user does not need to continuously press the trigger 20 to continuously use the power tool to work.

[0042] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Embodiment 1:

[0047] See also Figures 1 to 5 This is a first embodiment of a self-locking switch for an electric tool of the present invention. The self-locking switch for an electric tool includes a housing 10, a trigger 20 movably arranged on the housing 10, and a safety member 30 rotatably arranged on the housing 10. A switch body 40 triggered by the trigger 20 is arranged in the housing 10. The trigger 20 is movably arranged on the housing 10 mainly to facilitate the trigger 20 to move relative to the housing 10 to trigger the switch body 40. For example, the trigger 20 can slide relative to the housing 10 or the trigger 20 can swing relative to the housing 10, and a second elastic reset member 70 is arranged in the housing 10 to help the trigger 20 return to its initial position. The trigger 20 includes a first abutment portion 21 and a first clamping portion 22, and the safety member 30 is provided with a second abutment portion 31 and a second clamping portion 32. The safety member 30 includes an abutment position and a continuous triggering position, and is switched between the two positions by rotating the safety member 30 relative to the housing 10. The rotation switching can be that the safety member 30 rotates in the same direction all the time to switch between the two positions, or the safety member 30 rotates forward and reversely to switch between the two positions. In order to prevent misoperation, in this embodiment, the safety member 30 will be switched between the two positions by rotating forward and reversely. For example, the forward rotation of the safety member 30 will switch from the abutment position to the continuous triggering position, and the reverse rotation of the safety member 30 will switch from the continuous triggering position to the abutment position.

[0048] When the safety member 30 is in the abutting position, the first abutting portion 21 on the trigger 20 abuts against the second abutting portion 31 on the safety member 30. At this time, the trigger 20 cannot move relative to the housing 10 or only moves slightly relative to the housing 10. The trigger 20 cannot trigger the switch body 40. That is, the power tool is in a stopped state at this time, preventing the user from accidentally touching the trigger 20 and causing safety hazards when the power tool is running. When the safety member 30 is in the continuous triggering position, due to the rotation of the safety member 30, the second abutting portion 31 is misaligned with the first abutting portion 21, that is, the safety member 30 makes way for the first abutting portion 21, and the user can press the trigger 20 to trigger the switch body 40. The second clamping portion 32 is clamped with the first clamping portion 22 as the safety member 30 rotates, locking the trigger 20 in the triggering position all the time, allowing the trigger 20 to continuously trigger the switch body 40. The user does not have to press the trigger 20 to operate the power tool, which reduces the user's operating burden. Controlling the position switching of the safety member 30 by rotation is not only simple to operate and reduces the user's learning cost, but also less prone to misoperation than the push-type switching method. That is, when the safety member 30 is squeezed, it cannot be driven to move or under the same conditions, a greater force than the push-type is required to trigger the movement of the safety member 30, thereby improving overall safety.

[0049] Furthermore, the safety piece 30 that is rotatably disposed on the housing 10 may be rotatably disposed on the housing 10 in a plane, or may be rotatably disposed on the housing 10 in a spiral. If the safety piece 30 that is rotatably disposed on the housing 10 in a plane is rotatably disposed on the housing 10, when subjected to an axial force, the safety piece 30 will not switch positions, and it needs to rotate circumferentially to switch positions. In this way, two hands are required to lock the trigger 20 to continuously trigger the switch body 40, that is, one hand rotates the safety piece 30, and the other hand presses the trigger 20. The operation is relatively troublesome, but the safety factor is the highest. If the safety part 30 is spirally arranged on the housing 10, one-handed operation can be achieved. When an axial force is applied to the safety part 30, a component force driving the safety part 30 to rotate will be generated, and the safety part 30 will rotate along the spiral. However, since the force pressing on the safety part 30 will cause the safety part 30 to produce axial and circumferential movement, under the same conditions, a greater force is required to drive the safety part 30 to move. Compared with the safety part 30 that is axially slidably arranged on the housing 10, its safety factor is also greatly improved.

[0050] Since the safety member 30 is spirally arranged on the housing 10, it can be operated with one hand and has a higher safety factor. This solution will be described in detail in this embodiment.

[0051] In order to make the safety member 30 rotate spirally to switch between the abutment position and the continuous triggering position, a spiral portion 33 is provided on one of the side wall of the safety member 30 and the housing 10, and a guide portion 11 cooperating with the spiral portion 33 is provided on the other, and the safety member 30 rotates spirally relative to the housing 10 through the cooperation between the spiral portion 33 and the guide portion 11. In this embodiment, the spiral portion 33 is provided on the safety member 30, and the guide portion 11 is provided on the housing 10. If the positions of the two are opposite, the structural forms are basically the same.

[0052] In order to better assemble the safety member 30 with the housing 10, the safety member 30 is generally configured as a cylinder, and a guide hole is opened on the housing 10. The safety member 30 is arranged in the guide hole, and the guide portion 11 can be located in the guide hole or be arranged separately. At least one end of the safety member 30 extends out of the housing 10, and the safety member 30 is more stable when it rotates relative to the housing 10 through the guide hole.

[0053] The spiral portion 33 is arranged on the outer peripheral wall of the safety member 30 and protrudes from the side wall of the safety member 30. Considering that the first abutting portion 21 and the second abutting portion 31 need to be switched between the abutting and misaligned states, and the helical rotation switching position of the safety member 30 needs to adopt a forward and reverse rotation method, the spiral portion 33 does not need to go around the outer periphery of the safety member 30 in a full circle. The spiral portion 33 includes a first helical surface 331 and a second helical surface 332 that are arranged opposite to each other. Correspondingly, two guide portions 11 are provided on the housing 10 to abut against the first helical surface 331 and the second helical surface 332 respectively. The two helical surfaces play a role when the safety member 30 rotates in the forward and reverse directions respectively. Of course, if there is no assembly gap, the two guide portions 11 and the two helical surfaces can also play a role at the same time to eliminate the gap of the safety member 30 in the axial direction.

[0054] Furthermore, the guide portion 11 can be a guide block, which protrudes from the shell 10 toward the spiral portion 33, so as to ensure that the guide block abuts against the corresponding spiral surface. In this way, the structure of the guide portion 11 is relatively simple, and the shell 10 is generally produced by plastic injection molding, which can also reduce the manufacturing cost of the shell 10 mold.

[0055] On the basis of the above embodiment, in order to reduce the complexity of user operation, a first elastic reset member 60 is provided between the safety member 30 and the housing 10. When the safety member 30 switches from the abutment position to the continuous trigger position, a force will be applied to the first elastic reset member 60, so that the first elastic reset member 60 accumulates elastic potential energy. When it is necessary to switch the safety member 30 from the continuous trigger position to the abutment position, the elastic potential energy of the first elastic reset member 60 is released, and the safety member 30 will be driven to complete the position switching. This process does not require manual operation by the user, which can simplify the user operation steps. In the case where the safety member 30 is spirally rotated on the housing 10, the first elastic reset member 60 can be a compression spring, and the first elastic reset member 60 will generate an axial thrust to push the safety member 30 to switch from the continuous trigger position to the abutment position; in the case where the safety member 30 is rotated on the housing 10 in a plane, the first elastic reset member 60 can be a torsion spring, and the first elastic reset member 60 will generate a circumferential thrust to push the safety member 30 to switch from the continuous trigger position to the abutment position.

[0056] On the basis of the above embodiment, in order to ensure that the first clamping part 22 and the second clamping part 32 can be stably clamped together, the first clamping part 22 and the second clamping part 32 are both hook bodies. In this embodiment, the first clamping part 22 is arranged at one end of the first abutting part 21 close to the safety member 30, so that when the first clamping part 22 and the second clamping part 32 are clamped together, the movement stroke of the first clamping part 22 driven by the trigger 20 can be reduced. In order to ensure that the first clamping part 22 and the second clamping part 32 can be clamped together, a notch is provided between the second clamping part 32 and the second abutting part 31, and the notch allows the first clamping part 22 to move a certain distance toward the center direction of the safety member 30, so that the first clamping part 22 of the hook body and the second clamping part 32 of the hook body are first displaced along the radial direction of the safety member 30, so that the two hook bodies can finally hook together to complete the clamping process.

[0057] When the trigger 20 is driven to move alone, the trigger 20 cannot trigger the switch body 40 due to the abutment between the first abutting portion 21 and the second abutting portion 31. When the switch body 40 needs to be triggered, the safety member 30 is driven to rotate relative to the housing 10. If the safety member 30 and the housing 10 are arranged to rotate in a spiral manner, it is necessary to apply force to the safety member 30 in the axial direction to push the safety member 30 to rotate in a spiral manner. Of course, at this time, the end of the safety member 30 extending out of the housing 10 will also rotate relative to the user's finger, causing discomfort to the user. A pressing cap 80 can be put on the end of the safety member 30 extending out of the housing 10. The pressing cap 80 is put on the end of the safety member 30 and can rotate relatively. The pressing cap 80 and the housing 10 are connected by sliding along the axial direction of the safety member 30; if the safety member 30 and the housing 10 are arranged to rotate in a plane, the user needs to twist the safety member 30 to rotate the safety member 30 in the plane. In the above process, the trigger 20 can be continuously pressed. Once the first abutting portion 21 loses the abutment of the second abutting portion 31, the trigger 20 can move toward the center direction of the safety member 30 to trigger the switch body 40. As the safety member 30 continues to rotate, the second clamping portion 32 on the safety member 30 will clamp with the first clamping portion 22 on the trigger 20, maintaining the state of the trigger 20 continuously triggering the switch body 40. When the trigger 20 needs to release the state of continuously triggering the switch body 40, the clamping state of the first clamping portion 22 and the second clamping portion 32 is first released. If both the first clamping portion 22 and the second clamping portion 32 are hooks, the trigger 20 needs to be pressed first to decouple the first clamping portion 22 and the second clamping portion 32 in the radial direction of the safety member 30. At this time, the first elastic reset member 60 will drive the safety member 30 to rotate from the continuous trigger position to the abutting position. After releasing the hand, the second elastic reset member 70 will drive the trigger 20 back to the initial position.

[0058] like Figure 6 As shown, this embodiment also discloses an electric tool, including the electric tool self-locking switch of any of the above schemes, and the switch body 40 is electrically connected to the controller in the electric tool. The electric tool has a self-locking function, and the user does not need to press the trigger 20 all the time to maintain the electric tool in a working state, and before the safety member 30 is operated to switch positions, the electric tool will not be started even if the trigger 20 is accidentally touched. If the safety member 30 needs to be driven to switch positions, the safety member 30 needs to be rotated relative to the housing 10. Compared with the existing method of switching the position of the safety member 30 by pressing and driving the safety member 30 to slide relative to the housing 10, the safety factor of the electric tool is greatly improved.

[0059] Embodiment 2:

[0060] like Figure 7As shown, the difference between this embodiment and the first embodiment is that the structure of the guide portion 11 in this embodiment is different. In this embodiment, the guide portion 11 is a first spiral groove arranged on the shell 10, and the spiral groove is threadedly matched with the spiral portion 33 of the side wall of the protruding safety member 30, thereby increasing the contact area between the guide portion 11 and the spiral portion 33, and the safety member 30 can be more stable when the spiral rotation is carried out, and it is not easy to produce axial swing.

[0061] For other contents not described in this embodiment, please refer to Embodiment 1.

[0062] Embodiment three:

[0063] like Figure 8 As shown, the difference between this embodiment and the first embodiment is that in this embodiment, a second spiral groove is provided on the side wall of the safety member 30 to form a spiral portion 33, and accordingly, the guide portion 11 is provided on the housing 10, protrudes from the housing 10, and extends into the spiral portion 33. The guide portion 11 can be a guide block or an internal thread provided on the housing 10, and can also achieve the purpose of spiral rotation of the safety member 30 relative to the housing 10.

[0064] For other contents not described in this embodiment, please refer to Embodiment 1.

[0065] Embodiment 4:

[0066] like Fig. 9 As shown, the difference between this embodiment and the second embodiment is that in this embodiment, the guide part and the spiral part are both spiral grooves and balls are added, specifically: the spiral part 33 is a third spiral groove and is arranged on the outer peripheral wall of the safety part 30, the rotation axis of the spiral part 33 coincides with the rotation axis of the safety part 30, the guide part 11 is a fourth spiral groove arranged on the housing 10, and after the safety part 30 is assembled on the housing 10, the third spiral groove and the fourth spiral groove are combined into a guide groove, and a ball 50 is arranged in the guide groove. The ball 50 not only limits the safety part 30 in the direction of the rotation axis of the safety part 30 to prevent the safety part 30 from sliding out of the housing 10 in the axial direction, but also reduces the friction between the safety part 30 and the housing 10 when the safety part 30 rotates, so that the force that pushes the safety part 30 to rotate spirally is reduced, but under the same conditions, it still requires a greater driving force than the press type, and the overall safety can still be improved.

[0067] For other contents not described in this embodiment, please refer to Embodiment 1.

[0068] Embodiment five:

[0069] like Fig.10As shown, the difference between this embodiment and the first embodiment is that the structures of the first clamping portion 22 and the second clamping portion 32 in this embodiment are different. In this embodiment, one of the first clamping portion 22 and the second clamping portion 32 is a clamping groove and the other is a clamping block. This structure is only applicable to the case where the safety member 30 is spirally rotated and arranged on the housing 10. In order to ensure that the clamping groove and the clamping block can cooperate, a certain displacement is required in the axial direction of the safety member 30.

[0070] Specifically, the first clamping portion 22 is a clamping groove, and the second clamping portion 32 is a clamping block. The first clamping portion 22 is located on the first abutting portion 21, and the opening of the clamping groove is located at the end of the first abutting portion 21 close to the safety member 30. When the safety member 30 switches from the abutting position to the continuous triggering position, the second clamping portion 32 is located behind the spiral portion 33, and the second abutting portion 31 is located between the spiral portion 33 and the second clamping portion 32. The second abutting portion 31 can be an annular shape. When the safety member 30 rotates spirally, the second abutting portion 31 contacts the first abutting portion 21, and the trigger 20 does not move relative to the housing 10, so that the trigger 20 is kept stable. As the safety piece 30 continues to spirally rotate, the safety piece 30 moves axially and the second abutting portion 31 will be staggered with the first abutting portion 21. As the safety piece 30 reaches the continuous triggering position, the second clamping portion 32 also reaches the clamping position. When the trigger 20 is pressed, the second clamping portion 32 will be inserted into the first clamping portion 22. Driven by the first elastic reset member 60 or manually driven by the user to rotate the safety piece 30 in the opposite direction, the second clamping portion 32 squeezes the first clamping portion 22 along the circumferential direction of the safety piece 30, increasing the friction between the second clamping portion 32 and the first clamping portion 22. At the same time, the top surface of the second abutting portion 31 and the bottom surface of the first abutting portion 21 can also generate friction along the axial direction, thereby maintaining the clamping state of the first clamping portion 22 and the second clamping portion 32, and the trigger 20 can be kept in a state of continuously triggering the switch body 40.

[0071] If the continuous trigger position needs to be released, the safety member 30 needs to be rotated slightly toward the abutment position and the continuous trigger position to release the squeezing of the second clamping portion 32 and the first clamping portion 22 along the circumference of the safety member 30, and the second elastic reset member 70 is used to push the trigger 20 back to its original position, so that the first clamping portion 22 is disengaged from the second clamping portion 32, and then the safety member 30 is released, and the first elastic reset member 60 is used to return the safety member 30 from the continuous trigger position to the abutment position.

[0072] For other contents not described in this embodiment, please refer to Embodiment 1.

[0073] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A self-locking switch for an electric tool, characterized in that: The invention comprises a housing (10), a trigger (20) movably arranged on the housing (10), and a safety piece (30) rotatably arranged on the housing (10); a switch body (40) triggered by the trigger (20) is arranged in the housing (10); the trigger (20) comprises a first abutting portion (21) and a first clamping portion (22); and the safety piece (30) is provided with a second abutting portion (31) and a second clamping portion (32); The safety member (30) comprises an abutment position and a continuous triggering position. The safety member (30) switches between the abutment position and the continuous triggering position by rotating. When the safety member (30) is at the abutment position, the first abutment portion (21) abuts against the second abutment portion (31), and the trigger (20) cannot trigger the switch body (40); when the safety member (30) reaches the continuous triggering position, the second abutment portion (31) is misaligned with the first abutment portion (21), the second clamping portion (32) clamps against the first clamping portion (22), and the trigger (20) continuously triggers the switch body (40).

2. A self-locking switch for electric tools as claimed in claim 1, characterized in that: The safety member (30) is spirally arranged on the housing (10); one of the side wall of the safety member (30) and the housing (10) is provided with a spiral portion (33), and the other is provided with a guide portion (11) matched with the spiral portion (33).

3. A self-locking switch for electric tools as claimed in claim 2, characterized in that: The spiral portion (33) is arranged on the outer peripheral wall of the safety member (30) and protrudes from the side wall of the safety member (30), and the spiral portion (33) comprises a first spiral surface (331) and a second spiral surface (332) arranged opposite to each other. The housing (10) is provided with two guide portions (11) respectively abutting against the first spiral surface (331) and the second spiral surface (332).

4. A self-locking switch for electric tools as claimed in claim 3, characterized in that: The guide portion (11) is a guide block, and the guide portion (11) protrudes from the housing (10) in the direction of the spiral portion (33).

5. The self-locking switch for electric tools as claimed in claim 3, characterized in that: The guide portion (11) is a first spiral groove arranged on the housing (10), and the first spiral groove is adapted to the spiral portion (33).

6. A self-locking switch for electric tools as claimed in claim 2, characterized in that: The spiral portion (33) is a second spiral groove and is arranged on the outer peripheral wall of the safety member (30); the guide portion (11) is arranged on the housing (10) and protrudes from the housing (10) in the direction of the spiral portion (33).

7. A self-locking switch for electric tools as claimed in claim 2, characterized in that: The spiral portion (33) is a third spiral groove and is arranged on the outer peripheral wall of the safety member (30); the guide portion (11) is a fourth spiral groove and is arranged at a position on the housing (10) corresponding to the third spiral groove; the third spiral groove and the fourth spiral groove are combined into a guide groove, and a ball (50) is arranged in the guide groove.

8. The self-locking switch for electric tools according to claim 1, characterized in that: The first clamping portion (22) and the second clamping portion (32) are both hooks; or, one of the first clamping portion (22) and the second clamping portion (32) is a clamping slot, and the other is a clamping block.

9. The self-locking switch for electric tools according to claim 1, characterized in that: A first elastic reset member (60) is also provided between the safety member (30) and the housing (10), and the first elastic reset member (60) drives the safety member (30) to turn from the continuous triggering position to the abutting position.

10. An electric tool, characterized in that: A self-locking switch for electric tools according to any one of claims 1 to 9 is adopted.

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