A handle assembly and a power tool

Abstract

The present invention provides a handle assembly, comprising: a handle; a microswitch; a trigger, which is pivotally mounted on the handle and includes a abutting portion located inside the handle, a pressing portion at least partially located outside the handle, and a pivoting portion located between the abutting portion and the pressing portion; and a pressing plate, which is pivotally mounted inside the handle; wherein, the trigger controls the microswitch through the pressing plate to control the on / off of the circuit. Compared with the prior art, the handle assembly of the present invention triggers the microswitch through the pressing plate arranged inside the handle, so that the size of the trigger can be reduced without affecting the function; and, since one end of the pressing plate cooperating with the trigger can bear lateral force, one end of the pressing plate cooperating with the microswitch can be arranged to abut the microswitch directly.

Description

Technical Field

[0001] The present invention relates to a handle assembly and a power tool having the handle assembly. Background Art

[0002] With the progress of society, the application of hand-held power tools in our daily life is becoming more and more extensive. Hand-held power tools not only reduce the labor intensity of users, but also effectively improve the operation efficiency of users, thus saving manpower, material resources, etc. Existing hand-held power tools generally include an operation assembly, a driving assembly for driving the operation assembly to work, and a handle assembly for controlling the power-on or power-off of the driving assembly. The handle assembly includes a micro switch for controlling the power-on or power-off of the driving assembly and a trigger cooperating with the micro switch. The trigger requires a sufficient working stroke to ensure that the micro switch is completely triggered, and at the same time, it will not cause damage to the micro switch.

[0003] Please refer to Figure 1 As shown, in order to reduce the space occupied by the trigger in the handle, the trigger is arranged to apply a force to the triggering part of the micro switch from the side, and the included angle δ between the direction of the force F received by the triggering part of the micro switch and the axis of the triggering part is greater than 30°. Such a setting not only results in poor transmission efficiency of the trigger, but also poor user feel, that is, the user needs to apply a greater force to trigger the micro switch. At the same time, since the triggering part of the micro switch is laterally stressed, the micro switch is also relatively easily damaged.

[0004] In view of the above problems, it is necessary to provide a new handle assembly to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a handle assembly. The handle assembly triggers the micro switch through a pressing plate arranged in the handle, so that the size of the trigger can be reduced without affecting the function; and, since one end of the pressing plate cooperating with the trigger can bear lateral force, one end of the pressing plate cooperating with the micro switch can be arranged to abut against the micro switch directly, thus avoiding damaging the micro switch.

[0006] To achieve the above object, the present invention provides a handle assembly, including: a handle; a micro switch; a trigger pivotally mounted on the handle, including a holding part located in the handle, a pressing part at least partially located outside the handle, and a pivoting part located between the holding part and the pressing part; and a pressing plate pivotally mounted in the handle; wherein, the trigger controls the micro switch through the pressing plate to control the on-off of the circuit.

[0007] As a further improvement of the present invention, the microswitch includes a trigger part, the pressing plate includes a first pressing plate part that cooperates with the trigger part, and when the first pressing plate part abuts against the trigger part, the included angle between the axis of the trigger part and the first pressing plate part is between 80° and 110°.

[0008] As a further improvement of the present invention, the ratio of the distance between the pivot shafts of the pressing plate to the height of the trigger part is 9 to 36.

[0009] As a further improvement of the present invention, the pressing plate further includes a second pressing plate part that cooperates with the abutting part, and the ratio of the length of the first pressing plate part to the length of the second pressing plate part is less than or equal to 1.

[0010] As a further improvement of the present invention, the width of the trigger part is 3 mm to 5 mm.

[0011] As a further improvement of the present invention, the abutting part is provided with a groove that cooperates with the second pressing plate part; the ratio of the opening width of the groove to the thickness of the second pressing plate part is 1.05 to 1.5.

[0012] As a further improvement of the present invention, the ratio of the depth of the groove to the opening width of the groove is 1.1 to 2.

[0013] As a further improvement of the present invention, the abutting part is provided with a groove that cooperates with the second pressing plate part; the groove includes a bottom wall of the groove, a first side wall of the groove close to the pivot part, and a second side wall of the groove that is oppositely arranged with the first side wall of the groove and is far from the pivot part; an included angle α is formed between the first side wall of the groove and the second side wall of the groove, so that the distance between the first side wall of the groove and the second side wall of the groove gradually increases from the opening of the groove to the bottom wall of the groove; the degree of the included angle α is 10° to 20°.

[0014] As a further improvement of the present invention, a guiding wall is further arranged between the bottom wall of the groove and the first side wall of the groove, and the included angles between the guiding wall and the bottom wall of the groove and between the guiding wall and the first side wall of the groove are both obtuse angles.

[0015] As a further improvement of the present invention, the second pressing plate part includes a first pressing plate wall that cooperates with the first side wall of the groove and a second pressing plate wall that cooperates with the second side wall of the groove; an included angle β is formed between the first pressing plate wall and the second pressing plate wall; the degree of the included angle β is between 20° and 30°.

[0016] As a further improvement of the present invention, an included angle θ is formed between the first pressing plate part and the second pressing plate part, and the degree of the included angle θ is between 145° and 160°.

[0017] As a further improvement of the present invention, the trigger, the pressure plate, and the microswitch are arranged such that when the trigger rotates by an angle φ, the first pressure plate portion contacts the trigger portion of the microswitch; when the trigger rotates by an angle ψ, the first pressure plate portion abuts against the trigger portion of the microswitch, so that the trigger portion travels a displacement, thereby causing the microswitch to operate; the degree of the angle φ is between 7° and 9°, and the degree of the angle ψ is between 9° and 11°.

[0018] The present invention also discloses a power tool, including an operating component, a driving component for driving the operating component to work, and the aforementioned handle component, wherein the microswitch of the handle component is used to control the power-on or power-off of the driving component.

[0019] The beneficial effects of the present invention are as follows: The handle component of the present invention triggers the microswitch through the pressure plate arranged in the handle, so that the size of the trigger can be reduced without affecting the function; and, since one end of the pressure plate cooperating with the trigger can bear the lateral force, one end of the pressure plate cooperating with the microswitch can be arranged to abut against the microswitch directly, thereby avoiding damaging the microswitch. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the existing trigger and microswitch.

[0021] Figure 2 is a three-dimensional structural diagram of the handle component of the present invention.

[0022] Figure 3 is Figure 2 a schematic internal structural diagram of the handle component shown.

[0023] Figure 4 is a schematic structural diagram of the microswitch.

[0024] Figure 5 is a schematic structural diagram of the trigger.

[0025] Figure 6 is Figure 5 a partial enlarged view of the trigger shown.

[0026] Figure 7 is a schematic structural diagram of the pressure plate.

[0027] Figure 8 is a schematic cooperation diagram of the microswitch, the pressure plate, and the trigger, wherein the pressure plate is not in contact with the microswitch.

[0028] Figure 9 is a schematic cooperation diagram of the microswitch, the pressure plate, and the trigger, wherein the pressure plate just contacts the microswitch.

[0029] Figure 10It is a schematic diagram of the cooperation among the micro switch, the pressure plate, and the trigger, where the pressure plate abuts against the trigger part of the micro switch.

[0030] Figure 11 It has Figure 2 A schematic structural diagram of a power tool with the handle assembly shown. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Please refer to Figure 2 and Figure 3 As shown, the present invention discloses a handle assembly 100, including a handle 10, a micro switch 20, a trigger 30 at least partially located outside the handle 10, and a pressure plate 40 cooperating with the micro switch 20.

[0033] Please refer to Figure 2 and Figure 3 As shown, in an embodiment of the present application, the handle 10 includes a first housing 11 and a second housing 12 disposed opposite to the first housing 11. The first housing 11 and the second housing 12 together form a receiving cavity 13 to receive the micro switch 20, the trigger 30, and the pressure plate 40. In this embodiment, the handle 10 is a ring structure with a hollow part 14. The receiving cavity 13 includes a first receiving cavity 131 above the hollow part 14 and a second receiving cavity 132 between the hollow part 14 and the power tool. Please refer to Figure 3 and Figure 4 As shown, the micro switch 20 is disposed inside the handle 10 and located in the second receiving cavity 132 to control the on / off of the power tool circuit. The micro switch 20 includes a main body part 21 and a trigger part 22 on one side of the main body part 21. The width W of the trigger part 22 is 3 mm to 5 mm. Such a setting can ensure that there is enough contact area between the trigger part 22 and the pressure plate 40, and at the same time, it will not cause the cooperation between the trigger part 22 and the pressure plate 40 to be unsmooth due to the excessive width of the trigger part 22.

[0034] Please refer to Figure 3 and Figure 5As shown, the trigger 30 is pivotally mounted on the handle 10 and includes a resisting portion 31 located within the handle 10, a pressing portion 32 at least partially located outside the handle 10, a pivotal portion 33 between the resisting portion 31 and the pressing portion 32, and a first elastic element 34. The resisting portion 31 is located within the first receiving cavity 131 and cooperates with the pressing plate 40. The ratio of the length of the resisting portion 31 to the length of the pressing portion 32 is 0.4 - 0.5. With such a setting, the trigger 30 has a better force transmission ratio, enabling the user to drive the pressing plate 40 to move by applying a moderate force to the pressing portion 32, and then driving the triggering portion 22 through the pressing plate 40. At this time, the user will not feel a poor hand feeling due to an overly large force transmission ratio, nor will it be difficult to operate due to an overly small force transmission ratio. Preferably, the length of the resisting portion 31 is 4 cm - 5 cm, and the length of the pressing portion 32 is 10 cm - 12 cm. With such a setting, the stroke change amount per unit angle of the pressing portion 32 is suitable for the user's manual operation feeling, and at the same time, the stroke change amount per unit angle of the resisting portion 31 also matches the triggering portion 22. The resisting portion 31 is further provided with a groove 311 that cooperates with the pressing plate 40. Please refer to Figure 5 As shown, the groove 311 includes a groove bottom wall 3111, a first groove side wall 3112 adjacent to the pivotal portion 33, and a second groove side wall 3113 disposed opposite to the first groove side wall 3112 and away from the pivotal portion 33. An included angle α is formed between the first groove side wall 3112 and the second groove side wall 3113, so that the distance between the first groove side wall 3112 and the second groove side wall 3113 gradually increases from the opening of the groove 311 towards the groove bottom wall 3111. The degree of the included angle α is between 10° and 20°. A guiding wall 3114 is further provided between the groove bottom wall 3111 and the first groove side wall 3112. The included angles γ1 between the guiding wall 3114 and the groove bottom wall 3111 and γ2 between the guiding wall 3114 and the first groove side wall 3112 are both obtuse angles. The pressing portion 32 is located above the hollow portion 14 and at least partially protrudes into the hollow portion 14. In this embodiment, the pivotal portion 33 is a shaft hole, but in other embodiments, the pivotal portion 33 can also be a pivot shaft. The first elastic element 34 is used to reset the trigger 30. One end of the first elastic element 34 is fixedly installed on the pressing portion 32, and the other end is fixedly installed on the cavity wall of the first receiving cavity 131.

[0035] Please refer to Figure 3 and Figure 7As shown, the pressing plate 40 is disposed at the junction of the first receiving cavity 131 and the second receiving cavity 132. Since the trigger 30 triggers the microswitch 20 through the pressing plate 40, the size of the trigger 30 can be reduced without affecting the function, so that the handle 10 can be made thinner, avoiding the drawback that the existing handle is thicker because the trigger directly triggers the microswitch. The pressing plate 40 includes a first pressing plate portion 41 that cooperates with the triggering portion 22, a second pressing plate portion 42 that cooperates with the abutting portion 31, a pivot member 43 located between the first pressing plate portion 41 and the second pressing plate portion 42, and a second elastic element 44. In this embodiment, the pivot member 43 is a pivot shaft, but in other embodiments, the pivot member 43 can also be a shaft hole. The ratio of the length of the first pressing plate portion 41 to the length of the second pressing plate portion 42 is 0.9 to 1. Such a setting is to make the stroke change amount of the abutting portion 31 and the force applied by the abutting portion 31 be transmitted to the triggering portion 22 equally or nearly equally, thereby avoiding the deterioration of the user's feel due to a large force transmission ratio. Preferably, the ratio of the length of the first pressing plate portion 41 to the length of the second pressing plate portion 42 is 1. Also, since the second pressing plate portion 42 that cooperates with the trigger 30 can withstand a large lateral force, the first pressing plate portion 41 can be set to abut the microswitch 20 directly, thereby effectively avoiding damage to the microswitch 20. Preferably, the pressing plate 40 is set as: Please refer to Figure 9 As shown, when the first pressing plate portion 41 just contacts the triggering portion 22, the angle between the first pressing plate portion 41 and the plane perpendicular to the axis of the triggering portion 22 is not greater than 20°; Please refer to Figure 10 As shown, when the first pressing plate portion 41 abuts the triggering portion 22 to make the microswitch 20 work, the first pressing plate portion 41 is substantially perpendicular to the axis of the triggering portion 22, and at this time, the angle between the axis of the triggering portion 22 and the first pressing plate portion 41 is 80° to 110°. Such a setting can effectively prevent the triggering portion 22 of the microswitch 20 from being easily damaged due to a large lateral force. Preferably, in order to make the working stroke amount of the first pressing plate portion 41 suitable for the microswitch 20, the length of the first pressing plate portion 41 is 24 mm to 28 mm. The ratio of the distance between the pivot member 43 and the triggering portion 22 to the height H of the triggering portion 22 is 9 to 36. Such a setting makes the rotation angle amount of the first pressing plate portion 41 smaller when the first pressing plate portion 41 abuts and pushes the triggering portion 22 to move to make the microswitch 20 work, so that the first pressing plate portion 41 can be approximately perpendicular to the triggering portion 22 throughout, thereby avoiding damage to the microswitch 20 due to a large lateral force.

[0036] Please refer to Figure 5 、 Figure 7 and Figure 8 As shown, the second pressing plate portion 42 cooperates with the groove 311 of the abutting portion 31. The ratio of the opening width A of the groove 311 to the thickness C of the second pressing plate portion 42 is 1.05 - 1.5. With such a setting, it can make the second pressing plate portion 42 have a better moving space in the groove 311, and it will not cause a large collision between the second pressing plate portion 42 and the groove 311 due to a large moving space, thus generating noise. Preferably, the ratio of the depth B of the groove 311 to the opening width A of the groove 311 is 1.1 - 2. With such a setting, not only can the second pressing plate portion 42 better receive the force from the abutting portion 31, but also it can effectively prevent the second pressing plate portion 42 from easily slipping out of the groove 311 due to too shallow a depth, and at the same time, it can also prevent the second pressing plate portion 42 from not smoothly cooperating with the groove 311 due to too large a depth. Also, since the distance between the first groove side wall 3112 and the second groove side wall 3113 gradually increases from the opening of the groove 311 to the bottom wall 3111 of the groove, and the included angle between the guiding wall 3114 and the bottom wall 3111 of the groove, and the included angle between the guiding wall 3114 and the first groove side wall 3112 are both obtuse angles, thus enabling the second pressing plate portion 42 to easily rotate in the groove 311, and further enabling the second pressing plate portion 42 to change from a state perpendicular to the bottom wall 3111 of the groove (such as Figure 8 shown) to a state having a larger included angle with the bottom wall 3111 of the groove (such as Figure 10 shown). The second pressing plate portion 42 includes a first pressing plate wall 421 that cooperates with the first groove side wall 3112 and a second pressing plate wall 422 that cooperates with the second groove side wall 3113. An included angle β is formed between the first pressing plate wall 421 and the second pressing plate wall 422, and the degree of the included angle β is between 20° and 30°. With such a setting, it can make the second pressing plate portion 42 easily rotate in the groove 311. An included angle θ is formed between the second pressing plate portion 42 and the first pressing plate portion 41, and the degree of the included angle θ is between 145° and 160°. With such a setting, it is to facilitate the second pressing plate portion 42 to vertically insert into the groove 311, and at the same time, the first pressing plate portion 41 can be substantially perpendicular to the axis of the triggering portion 22. In this embodiment, the second elastic element 44 is a torsion spring for resetting the pressing plate 40.

[0037] Please refer to Figure 8 、 Figure 9 and Figure 10As shown, when the handle assembly 100 of the present invention is used, pressing the pressing portion 32 causes the pressing portion 32 to rotate around the pivoting portion 33, so that the pressing plate 40 rotates under the action of the abutting portion 31, and further causes the first pressing plate portion 41 to contact the triggering portion 22. Then, continue to press the pressing portion 32. At this time, the first pressing plate portion 41 continues to abut against and push the triggering portion 22 to move under the action of the abutting portion 31 and the second pressing plate portion 42, so that the microswitch 20 is triggered. When the pressing portion 32 is released, the pressing plate 40 is reset under the action of the second elastic element 44, and the trigger 30 is reset under the action of the first elastic element 34. Preferably, the trigger 30, the pressing plate 40, and the microswitch 20 are arranged such that when the trigger 30 rotates by an angle φ, the first pressing plate portion 41 just contacts the triggering portion 22 of the microswitch 20; when the trigger 30 continues to rotate by an angle ψ, the first pressing plate portion 41 abuts against the triggering portion 22 of the microswitch 20, so that the triggering portion 22 travels a displacement, thereby causing the microswitch 20 to operate. The degree of the angle φ is between 7° and 9°, and the degree of the angle ψ is between 9° and 11°. Preferably, the angle φ is 8.2°, and the angle ψ is 9.4°.

[0038] Please refer to Figure 11 As shown, the present invention also discloses a power tool 200, including an operating assembly 201, a driving assembly (not shown) for driving the operating assembly 201 to work, and the handle assembly 100. The microswitch 20 of the handle assembly 100 is used to control the energization or power-off of the driving assembly.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A handle assembly, characterized in that, Comprising: A handle; A microswitch; A trigger pivotally mounted on the handle, including a abutting portion located within the handle, a pressing portion at least partially located outside the handle, and a pivoting portion between the abutting portion and the pressing portion; and A pressing plate pivotally mounted within the handle; Wherein, the trigger controls the microswitch through the pressing plate to control the on / off of the circuit; The microswitch includes a triggering portion, and the pressing plate includes a first pressing plate portion cooperating with the triggering portion; The trigger, the pressing plate, and the microswitch are arranged such that when the trigger rotates by an angle φ, the first pressing plate portion contacts the triggering portion of the microswitch; when the trigger rotates by an angle ψ, the first pressing plate portion abuts against the triggering portion of the microswitch, so that the triggering portion travels a displacement, thereby causing the microswitch to operate; the degree of the angle φ is between 7° and 9°, and the degree of the angle ψ is between 9° and 11°.

2. The handle assembly according to claim 1, wherein: When the first pressing plate portion abuts against the triggering portion, the included angle between the axis of the triggering portion and the first pressing plate portion is between 80° and 110°.

3. The handle assembly according to claim 1, wherein: The ratio of the distance between the triggering portion and the pivot axis of the pressing plate to the height of the triggering portion is 9 to 36.

4. The handle assembly according to claim 1, wherein: The pressing plate further includes a second pressing plate portion cooperating with the abutting portion, and the ratio of the length of the first pressing plate portion to the length of the second pressing plate portion is less than or equal to 1.

5. The handle assembly according to claim 1, wherein: The width of the triggering portion is 3 mm to 5 mm.

6. The handle assembly according to claim 4, wherein: The abutting portion is provided with a groove cooperating with the second pressing plate portion; the ratio of the opening width of the groove to the thickness of the second pressing plate portion is 1.05 to 1.

5.

7. The handle assembly according to claim 6, characterized in that: The ratio of the depth of the groove to the opening width of the groove is 1.1 to 2.

8. The handle assembly according to claim 4, characterized in that: The abutting portion is provided with a groove cooperating with the second pressing plate portion; the groove includes a bottom wall, a first groove side wall close to the pivoting portion, and a second groove side wall oppositely arranged with the first groove side wall and away from the pivoting portion; an included angle α is formed between the first groove side wall and the second groove side wall, so that the distance between the first groove side wall and the second groove side wall gradually increases from the opening of the groove to the bottom wall; the degree of the included angle α is 10° to 20°.

9. The handle assembly according to claim 8, wherein: A guiding wall is further provided between the bottom wall and the first groove side wall, and the included angles between the guiding wall and the bottom wall, and between the guiding wall and the first groove side wall are both obtuse angles.

10. The handle assembly according to claim 8, characterized in that: The second pressing plate portion includes a first pressing plate wall cooperating with the first groove side wall and a second pressing plate wall cooperating with the second groove side wall; an included angle β is formed between the first pressing plate wall and the second pressing plate wall; the degree of the included angle β is between 20° and 30°.

11. The handle assembly according to claim 8, wherein: An included angle θ is formed between the first pressing plate portion and the second pressing plate portion, and the degree of the included angle θ is between 145° and 160°.

12. An electric tool, characterized in that, Comprising: An operating assembly; A driving assembly for driving the operating assembly to work; And The handle assembly according to any one of claims 1 to 11, wherein the microswitch of the handle assembly is used to control the energization or de-energization of the driving assembly.

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