Trigger speed regulating mechanism and garden air blower

Abstract

The utility model relates to the field of garden electric tools, and particularly discloses a trigger speed regulating mechanism and a garden air blower. The trigger speed regulating mechanism comprises a trigger, a magnetic element installed at one end of the trigger, a speed regulating switch arranged on one side of the trigger, and a Hall switch connected with the speed regulating switch through a circuit board and located on one side of the magnetic element; the Hall switch can be fixedly installed on the circuit board, and a touch block is arranged on one side of the trigger and corresponds to an elastic moving contact piece of the speed control switch. When the trigger rotates, the touch block can touch the elastic movable contact piece, so that the speed control switch is in an on state. Meanwhile, the Hall switch controls the speed parameter output by the speed regulation switch through the magnetic field change of the magnetic element. According to the trigger speed regulating mechanism, the Hall switch induces the magnetic field change of the magnetic element to regulate the speed of the trigger, a traditional mechanical pressing mode is replaced, the fault rate of the speed regulating switch is reduced, and the service life of the speed regulating switch is prolonged.

Description

Technical Field

[0001] The present application relates to the field of garden power tools, and in particular to a trigger speed regulating mechanism and a garden blower. Background Art

[0002] A backpack garden blower is a commonly used garden power tool, which is mainly used to use airflow to clean fallen leaves, grass clippings, road dust, snow, etc.

[0003] The backpack garden blower mainly includes a backpack frame, a shell installed on the backpack frame, a battery pack, a motor, a fan arranged in the shell, and a purge pipe connected to the shell and used to guide the high-speed airflow generated by the fan. A handle is installed on the purge pipe, and a trigger is installed on the shell of the handle.

[0004] Through understanding of relevant technologies, the trigger on the handle of the current backpack garden blower is mainly used to gradually press the speed control switch by rotating the trigger to achieve the speed control purpose. In actual application, this mechanical speed control structure is likely to cause the speed control switch to fail if used for a long time. Utility Model Content

[0005] The purpose of at least one specific embodiment of the present utility model is to solve the defects of the prior art and provide a trigger speed regulating mechanism and a garden blower.

[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0007] A trigger speed regulating mechanism, comprising:

[0008] trigger;

[0009] a magnetic element mounted on one end of the trigger;

[0010] The speed switch is mounted on the side of the trigger;

[0011] A Hall switch, which is connected to the speed control switch through a circuit board and is located on one side of the magnetic element;

[0012] Among them, a touch block is provided on one side of the trigger, and the touch block corresponds to the elastic movable contact piece of the speed regulating switch;

[0013] When the trigger is rotated, the contact block can touch the elastic movable contact piece, so that the speed control switch is in the on state;

[0014] At the same time, the Hall switch controls the speed parameter output by the speed control switch through the change of the magnetic field of the magnetic element.

[0015] Through the above technical solution, when the trigger is in the initial state, the speed control switch is in the closed state. When the trigger is pressed by the human hand, the trigger will rotate. During the rotation of the trigger, the touch block on the side will touch the elastic movable contact piece of the speed control switch, so that the speed control switch is in the open state. At the same time, during the rotation of the trigger, the magnetic element at its end will swing relative to the Hall switch. During the swing of the magnetic element, the magnetic field sensed by the Hall switch will change. The Hall switch controls the speed parameter output by the speed control switch according to the change of the sensed magnetic field, thereby achieving the purpose of speed regulation during the rotation of the trigger.

[0016] The trigger speed regulating mechanism uses the Hall switch to sense the magnetic field change of the magnetic element to adjust the trigger speed, replacing the traditional mechanical pressing method, reducing the failure rate of the speed regulating switch and increasing the service life of the speed regulating switch.

[0017] Furthermore, the trigger includes a connecting portion, a rotating portion and a pressing portion respectively arranged at two ends of the connecting portion, and the magnetic element is installed at the rotating portion.

[0018] Furthermore, the magnetic element is in an arc shape, and the Hall switch is fixedly mounted on one side of the magnetic element.

[0019] Furthermore, the connecting portion of the trigger is rotatably connected to the handle housing via a pin shaft, and a torsion spring is sleeved on the pin shaft. The torsion spring is suitable for controlling the reset of the trigger after rotation.

[0020] Furthermore, the speed regulating switch is a normally closed switch.

[0021] Furthermore, the speed regulating switch is provided with a fixed contact. When the trigger is in the initial state, the trigger block on the side of the trigger squeezes the elastic movable contact piece and causes the elastic movable contact piece to contact the fixed contact piece, and the speed regulating switch is in the closed state.

[0022] When the trigger is rotated, the elastic movable contact piece is separated from the fixed contact point, and the speed regulating switch is in the on state.

[0023] Furthermore, the magnetic element is arc-shaped and is made of a magnetic strip.

[0024] Furthermore, the surface of the touch block that contacts the elastic movable contact piece is an arc-shaped surface.

[0025] Furthermore, a mounting slot is provided at the rotating portion, and the magnetic element is embedded in the mounting slot. The side surface of the magnetic element is a magnetic arc surface, and the magnetic arc surface corresponds to the Hall switch;

[0026] When the trigger drives the magnetic element to rotate, the magnetic arc surface swings on one side of the Hall switch. The Hall switch controls the speed parameter output by the speed control switch through the change of the magnetic field of the magnetic element.

[0027] The beneficial technical effect of the trigger speed adjustment mechanism provided by the present application compared with the existing technology is that the trigger speed adjustment mechanism uses a Hall switch to sense the magnetic field change of the magnetic element to adjust the trigger speed, replacing the traditional mechanical pressing method, reducing the failure rate of the speed adjustment switch, and increasing the service life of the speed adjustment switch.

[0028] Another technical solution adopted in this application is to provide a garden blower, comprising:

[0029] handle;

[0030] The trigger speed regulating mechanism mentioned above;

[0031] Among them, the trigger speed regulating mechanism is installed in the housing of the handle.

[0032] Through the above technical solution, after the trigger speed regulating mechanism is installed on the handle of the garden blower, it has the corresponding technical effect of the above trigger speed regulating mechanism, reduces the failure rate of the speed regulating switch on the handle, and increases the service life of the speed regulating switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is a structural diagram of a trigger speed regulating mechanism in a certain embodiment of the present application;

[0035] Figure 2 This is a structural diagram of a trigger in a certain embodiment of the present application;

[0036] Figure 3 It is a schematic diagram of the installation structure of the trigger speed regulating mechanism on the handle housing;

[0037] Figure 4 for Figure 3 Schematic diagram of the local structure;

[0038] Figure 5 This is a schematic structural diagram of a garden blower in an embodiment of the present application. DETAILED DESCRIPTION

[0039] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0040] Example 1

[0041] Reference Figure 1 A trigger speed regulating mechanism 100 includes a trigger 10, a magnetic element 20 installed at one end of the trigger 10, a speed regulating switch 30 arranged on one side of the trigger 10, a Hall switch 50 connected to the speed regulating switch 30 through a circuit board 40, and located on one side of the magnetic element 20. During actual installation, the Hall switch 50 can be fixedly mounted on the circuit board 40.

[0042] Furthermore, a touch block 101 is provided on one side of the trigger 10 , and the touch block 101 corresponds to the elastically movable contact piece 301 of the speed regulating switch 30 ;

[0043] When the trigger 10 rotates, the trigger block 101 can touch the elastic movable contact piece 301, so that the speed control switch 30 is in the on state;

[0044] At the same time, the Hall switch 50 controls the speed parameter output by the speed regulating switch 30 through the change of the magnetic field of the magnetic element 20 .

[0045] Specifically, when the trigger 10 is in the initial state, the speed control switch 30 is in the closed state. When the trigger 10 is pressed by a person, the trigger 10 will rotate. During the rotation of the trigger 10, the touch block 101 on the side thereof will touch the elastic movable contact piece 301 of the speed control switch 30, so that the speed control switch 30 is in the open state. At the same time, during the rotation of the trigger 10, the magnetic element 20 at its end will swing relative to the Hall switch 50. During the swinging of the magnetic element 20, the magnetic field sensed by the Hall switch 50 will change. The Hall switch 50 controls the speed parameter output by the speed control switch 30 according to the change in the sensed magnetic field, thereby achieving the purpose of speed regulation during the rotation of the trigger.

[0046] The trigger speed regulating mechanism adjusts the trigger speed by sensing the magnetic field change of the magnetic element 20 through the Hall switch 50, replacing the traditional mechanical pressing method, reducing the failure rate of the speed regulating switch and increasing the service life of the speed regulating switch.

[0047] The present application is described in detail below in conjunction with the specific structure.

[0048] Reference Figure 2The trigger 10 includes a connecting portion 102, a rotating portion 103 and a pressing portion 104 respectively provided at both ends of the connecting portion 102, and the magnetic element 20 is installed at the rotating portion 103. In this embodiment, a mounting notch 105 is provided at the rotating portion 103, and the magnetic element 20 is embedded in the mounting notch 105. The magnetic element 20 is arc-shaped and is made of a magnetic strip. The Hall switch 50 is fixedly mounted on one side of the magnetic element 20. Specifically, in this embodiment, the Hall switch 50 is mounted on the circuit board 40.

[0049] In addition, the side surface of the magnetic element 20 is a magnetic arc surface 201 , and the magnetic arc surface 201 corresponds to the Hall switch 50 .

[0050] Reference Figure 3 , Figure 4 The connecting portion 102 of the trigger 10 is rotatably connected to the handle housing 70 through a pin 60. A torsion spring 80 is sleeved on the pin 60. One end of the torsion spring 80 is connected to the handle housing 70, and the other end is connected to the trigger 10. When the trigger 10 rotates, the torsion spring 80 can control the rotation of the trigger 10 to reset.

[0051] In some embodiments, the speed control switch 30 is a normally closed switch, and the speed control switch 30 has a fixed contact 302. When the trigger 10 is in the initial state, the trigger block 101 on the side of the trigger 10 squeezes the elastic movable contact 301 and makes the elastic movable contact 301 contact with the fixed contact 302, and the speed control switch 30 is in the closed state. It should be noted that the surface 106 on the trigger block 101 that contacts the elastic movable contact 301 is an arc-shaped surface.

[0052] When a person applies pressure to the pressing portion 104 of the trigger 10, the trigger 10 rotates relative to the pin 60. At this time, the trigger block 101 on the side of the trigger 10 also rotates together. When the surface 106 of the trigger block 101 separates from the elastic movable contact piece 301, the elastic movable contact piece 301 separates from the fixed contact 302 under the action of its own elastic force. At this time, the speed control switch 30 is in the on state.

[0053] That is to say, when the pressing part 104 of the trigger 10 is under pressure, the trigger 10 will rotate. When the trigger 10 rotates, the touch block 101 on its side will trigger the speed control switch 30 to turn on immediately. In the process of the trigger 10 driving the magnetic element 20 to rotate, the magnetic arc surface 201 of the magnetic element 20 swings on one side of the Hall switch 50. The Hall switch 50 controls the speed parameter output by the speed control switch 30 through the change of the magnetic field of the magnetic element 20.

[0054] Therefore, the trigger speed control mechanism 100 provided in the present application performs trigger speed control by sensing the magnetic field change of the magnetic element 20 through the Hall switch 50, replacing the traditional mechanical pressing method, reducing the failure rate of the speed control switch 30, and increasing the service life of the speed control switch.

[0055] Example 2

[0056] Reference Figure 5 Based on the same technical concept, an embodiment of the present application provides a garden blower 200, including a handle 210. The trigger speed regulating mechanism 100 in the above embodiment is installed in the housing of the handle 210. After the trigger speed regulating mechanism 100 is installed on the handle 210 of the garden blower 200, it has the corresponding technical effect of the above trigger speed regulating mechanism 100, reduces the failure rate of the speed regulating switch on the handle 210, and increases the service life of the speed regulating switch.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A trigger speed regulating mechanism, characterized in that: include; trigger; a magnetic element mounted on one end of the trigger; a speed regulating switch mounted on one side of the trigger; a Hall switch connected to the speed regulating switch via a circuit board and located on one side of the magnetic element; Wherein, a touch block is provided on one side of the trigger, and the touch block corresponds to the elastic movable contact piece of the speed regulating switch; When the trigger rotates, the touch block can touch the elastic movable contact piece, so that the speed regulating switch is in the on state; At the same time, the Hall switch controls the speed parameter output by the speed regulating switch through the change of the magnetic field of the magnetic element.

2. The trigger speed regulating mechanism according to claim 1, characterized in that: The trigger includes a connecting portion, a rotating portion and a pressing portion respectively arranged at two ends of the connecting portion, and the magnetic element is installed at the rotating portion.

3. The trigger speed regulating mechanism according to claim 1, characterized in that: The magnetic element is in an arc shape, and the Hall switch is fixedly mounted on one side of the magnetic element.

4. The trigger speed regulating mechanism according to claim 2, characterized in that: The connecting portion of the trigger is rotatably connected to the handle housing via a pin shaft, and a torsion spring is sleeved on the pin shaft. The torsion spring is suitable for controlling the reset of the trigger after rotation.

5. The trigger speed regulating mechanism according to claim 1, characterized in that: The speed regulating switch is a normally closed switch.

6. The trigger speed regulating mechanism according to claim 5, characterized in that: The speed regulating switch is provided with a fixed contact. When the trigger is in the initial state, the trigger block on the side of the trigger presses the elastic movable contact piece and causes the elastic movable contact piece to contact the fixed contact piece, and the speed regulating switch is in the closed state. When the trigger rotates, the elastic movable contact piece is separated from the fixed contact point, and the speed regulating switch is in an on state.

7. The trigger speed regulating mechanism according to claim 5, characterized in that: The material of the magnetic element is a magnetic strip.

8. The trigger speed regulating mechanism according to claim 2, characterized in that: The surface of the touch block that contacts the elastic movable contact piece is an arc-shaped surface.

9. The trigger speed regulating mechanism according to claim 2, characterized in that: The rotating portion is provided with a mounting slot, the magnetic element is embedded in the mounting slot, the side surface of the magnetic element is a magnetic arc surface, and the magnetic arc surface corresponds to the Hall switch; When the trigger drives the magnetic element to rotate, the magnetic arc surface swings on one side of the Hall switch, and the Hall switch controls the speed parameter output by the speed regulating switch through the change of the magnetic field of the magnetic element.

10. A garden blower, characterized in that: include: handle; The trigger speed regulating mechanism according to any one of claims 1 to 9; Wherein, the trigger speed regulating mechanism is installed in the housing of the handle.

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