Novel knob structure

Abstract

The utility model discloses a novel knob structure, which comprises a hand wheel, a shell, an adjustable resistor and a PCB (printed circuit board) which are sequentially arranged from top to bottom, a mounting hole with an upward opening is formed in the side, facing the hand wheel, of the shell, a bullet and a spring which are sequentially distributed from top to bottom are arranged in the mounting hole, and a circle of wavy clamping groove is further formed in the bottom of the hand wheel in a surrounding mode. The hand wheel locking device is reasonable in structural design, the bullet head can be matched with the wave-shaped clamping groove in the bottom of the hand wheel in a limiting mode under the elastic effect of the spring, and then position locking of the hand wheel is achieved; according to the utility model, through the cooperation among the bullet, the spring and the wave-shaped clamping groove, a shifting piece type knob structure in the prior art can be replaced, so that the service life of the knob structure is prolonged; and (2) each groove on the wave-shaped clamping groove represents a gear, gear adjustment can be easily realized by rotating the hand wheel, an operator can feel a pause hand feeling during gear switching, the operation is simple and convenient, the cost is low, and the product competitiveness is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tool hand wheels, in particular to a novel knob structure. Background Art

[0002] At present, the rotation function of the hand wheel of an electric tool is usually used in operations such as hand grinders, hand drills, and electric hammers. Among them, the rotation function of the hand wheel of an electric tool is mostly achieved by turning, for example, by turning a plastic sheet or a hardware sheet. However, most of the existing turning pieces have poor fatigue resistance, resulting in a short life of the existing hand wheel.

[0003] The defect of the above-mentioned prior art is that the fatigue resistance of the existing paddle is poor, resulting in a short life of the existing hand wheel. Utility Model Content

[0004] The utility model aims to provide a novel knob structure to solve the technical problem that the existing pick has poor fatigue resistance and thus has a short service life of the existing hand wheel.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a new type of knob structure, including a handwheel, a shell, an adjustable resistor, and a PCB board arranged in sequence from top to bottom, a rotating shaft extending vertically downward is fixedly arranged at the bottom of the handwheel, a buckle is arranged at the bottom end of the rotating shaft, the rotating shaft passes downward through the shell, the adjustable resistor, and the PCB board, and is connected to the bottom of the PCB board through the buckle; a mounting hole with an upward opening is arranged on the side of the shell facing the handwheel, a bullet head and a spring are arranged in sequence from top to bottom inside the mounting hole, a circle of wavy card grooves adapted to the bullet head are also arranged around the bottom of the handwheel, and the handwheel can be locked in position through the wavy card groove and the bullet head.

[0006] Furthermore, a column extending vertically upward is provided in the middle of the shell, the mounting holes are arranged at intervals on the side of the column, and a first through hole penetrating up and down is provided on the column, the first through hole is adapted to the rotating shaft, and the hand wheel rotates with the shell through the rotating shaft.

[0007] Furthermore, a baffle extending vertically upward is provided on the side of the column, and the baffle is fixedly connected to the column. An arc-shaped wall extending vertically downward is also provided on the bottom of the handwheel, and the arc-shaped wall is spaced apart beside the rotating shaft. The handwheel is limited by the baffle of the outer shell through the arc-shaped wall to limit the rotation range of the handwheel.

[0008] Furthermore, the center line of the column is higher than the center line of the mounting hole.

[0009] Furthermore, a cavity for accommodating an adjustable resistor is provided at the bottom of the shell, and the adjustable resistor extends upward into the cavity of the shell.

[0010] Furthermore, a second through hole is provided in the middle of the adjustable resistor, which passes through from top to bottom, and a circular ring is installed inside the second through hole. The circular ring is rotatably matched with the adjustable resistor through the second through hole; the inner side of the circular ring is provided with a square slot, and the rotating shaft is provided with a square slot that forms a close contact with the square slot.

[0011] Furthermore, the buckle is in the shape of a truncated cone with a larger top and a smaller bottom as a whole, a gap is provided in the middle of the buckle, and the left and right sides of the gap are configured as movable walls.

[0012] Furthermore, a third through hole is provided in the middle of the PCB board, which passes through the third through hole upward and downward. The rotating shaft passes through the third through hole downward and is engaged with the PCB board through two movable walls to limit the downward movement of the PCB board.

[0013] Furthermore, the top of the bullet head is configured to be hemispherical to reduce the friction of the bullet head sliding along the wavy slot.

[0014] Furthermore, a plurality of raised ribs are arranged at intervals around the outer circumferential surface of the hand wheel to achieve anti-slip effect.

[0015] In summary, the technical solution of the present invention has the following beneficial effects: the structural design of the present invention is reasonable. (1) Under the elastic action of the spring, the bullet head of the present invention can cooperate with the wave-shaped slot at the bottom of the handwheel to lock the position of the handwheel. The present invention can replace the paddle type of the prior art through the cooperation between the bullet head, the spring and the wave-shaped slot to extend the service life of the knob structure. (2) Each slot on the wave-shaped slot represents a gear position. The gear position can be easily adjusted by turning the handwheel. The operator can also feel the hand-feeling when switching gear positions. The operation is simple and the cost is low, which greatly improves the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram of the explosion structure;

[0018] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure when the PCB board is removed;

[0019] Figure 4 yes Figure 3 Schematic diagram of the three-dimensional structure when the hand wheel is removed;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the hand wheel of the utility model;

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the shell of the utility model;

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the assembly of the circular ring and the adjustable resistor of the utility model;

[0023] Figure 8 It is a rear view structural schematic diagram of the utility model.

[0024] Explanation of the accompanying drawings: 1-handwheel, 101-rotating shaft, 1011-buckle, 1012-square snap-in position, 102-wavy slot, 103-arc wall, 104-raised rib, 2-housing, 201-mounting hole, 202-column, 2021-first through hole, 203-baffle, 3-adjustable resistor, 301-second through hole, 4-PCB board, 401-third through hole, 5-bullet head, 6-spring, 7-ring, 701-square slot. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention, but this does not constitute a limitation on the protection scope of the present invention.

[0026] In the present invention, for a clearer description, the following explanation is made: the observer faces the attached Figure 8 For observation, the left side of the observer is set as left, the right side of the observer is set as right, the front of the observer is set as front, the rear of the observer is set as rear, the top of the observer is set as top, and the bottom of the observer is set as bottom. It should be pointed out that the terms "front end", "rear end", "left side", "right side", "middle", "top", "bottom" and the like in the text indicate the orientation or position relationship based on the orientation or position relationship set in the drawings, which is only for the convenience of clearly describing the utility model, and does not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", and "fourth" are only used for the purpose of clarity or simplification of description, and cannot be understood as indicating or implying relative importance or quantity.

[0027] See also Figures 1 to 8The present embodiment provides a novel knob structure, comprising a handwheel 1, a housing 2, an adjustable resistor 3, and a PCB board 4 which are arranged in sequence from top to bottom. A rotating shaft 101 extending vertically downward is fixedly arranged at the bottom of the handwheel 1, and a buckle 1011 is arranged at the bottom of the rotating shaft 101. The rotating shaft 101 passes downward through the housing 2, the adjustable resistor 3, and the PCB board 4, and is engaged and connected with the bottom of the PCB board 4 through the buckle 1011; a mounting hole 201 with an opening facing upward is arranged on the side of the housing 2 facing the handwheel 1, and a bullet head 5 and a spring 6 which are distributed in sequence from top to bottom are arranged inside the mounting hole 201. A wave-shaped groove 102 which is adapted to the bullet head 5 is also arranged around the bottom of the handwheel 1, and the handwheel 1 can be locked in position with the bullet head 5 through the wave-shaped groove 102. Function: (1) Under the elastic action of the spring 6, the bullet head 5 of the utility model can cooperate with the wavy groove 102 at the bottom of the handwheel 1 to achieve the position locking of the handwheel 1; the utility model can replace the paddle type of the prior art through the cooperation between the bullet head 5, the spring 6 and the wavy groove 102 to extend the service life of the knob structure; (2) Each groove on the wavy groove 102 represents a gear position, and the gear position can be easily adjusted by turning the handwheel 1. The operator can also feel the frustration when switching gears. It is easy to operate and low cost, which greatly improves the product competitiveness.

[0028] Specifically, a column 202 extending vertically upward is provided in the middle of the housing 2, and the mounting holes 201 are arranged at intervals beside the column 202. A first through hole 2021 penetrating from top to bottom is provided on the column 202, and the first through hole 2021 is adapted to the rotating shaft 101, and the hand wheel 1 is rotatably matched with the housing 2 through the rotating shaft 101. Function: The housing 2 can provide an upward supporting force to the hand wheel 1 through the arrangement of the column 202.

[0029] Specifically, a baffle 203 extending vertically upward is also provided beside the column 202, and the baffle 203 is fixedly connected to the column 202. A curved wall 103 extending vertically downward is also provided at the bottom of the hand wheel 1, and the curved wall 103 is arranged at intervals beside the rotating shaft 101. The hand wheel 1 is limited by the baffle 203 of the housing 2 through the curved wall 103 to limit the rotation range of the hand wheel 1. In actual application, the housing 2 is fixed, and the hand wheel 1 can rotate clockwise or counterclockwise. When the curved wall 103 of the hand wheel 1 abuts against the baffle 203, it means that the gear position at this time is the maximum or minimum gear position value. The operator can adjust the gear position according to the actual situation.

[0030] Specifically, the center line of the column 202 is higher than the center line of the mounting hole 201. Function: (1) The mounting hole 201 needs to install the spring 6 and the bullet head 5. At this time, the spring 6 needs a certain space to exert its elastic effect; (2) The operator applies an external force to the hand wheel 1. At this time, the bullet head 5 can be extended and retracted along the wavy slot 102 under the elastic effect of the spring 6 to achieve the gear lock.

[0031] Specifically, a cavity for accommodating the adjustable resistor 3 is provided at the bottom of the housing 2, and the adjustable resistor 3 enters upward into the cavity of the housing 2. Function: By arranging the adjustable resistor 3 in the bottom cavity of the housing 2, the adjustable resistor 3 can be well hidden in the housing 2, thereby ensuring a good appearance of the product.

[0032] Specifically, a second through hole 301 is provided in the middle of the adjustable resistor 3, which is penetrated from top to bottom. A circular ring 7 is installed inside the second through hole 301. The circular ring 7 is rotatably matched with the adjustable resistor 3 through the second through hole 301. The inner side of the circular ring 7 is provided with a square slot 701, and the rotating shaft 101 is provided with a square slot 1012 which is in close contact with the square slot 701. In actual application, (1) when the operator turns the hand wheel 1, the circular ring 7 will rotate with the hand, while the housing 2, the adjustable resistor 3, and the PCB board 4 are all prohibited from moving; (2) the adjustable resistor 3 can also be matched with electronic accessories such as a motor and the PCB board 4 to realize the speed adjustment of the electric tool.

[0033] Specifically, the buckle 1011 is generally in the shape of a truncated cone with a larger top and a smaller bottom. A gap is provided in the middle of the buckle 1011, and the left and right sides of the gap are provided as movable walls. In actual application, a gap is provided in the middle of the buckle 1011, so that the movable walls on the left and right sides of the gap have certain elastic properties, and can shrink inward or expand outward under the action of external force, so that the PCB board 4 can be easily inserted into the rotating shaft 101 of the hand wheel 1.

[0034] Specifically, a third through hole 401 is provided in the middle of the PCB board 4, which passes through the third through hole 401 downward, and is engaged with the PCB board 4 through two movable walls to limit the downward movement of the PCB board 4. In actual application, the top surfaces of the two movable walls are flush with and fixed to the bottom surface of the PCB board 4, and the housing 2, the adjustable resistor 3, the PCB board 4 and the hand wheel 1 are cleverly engaged and installed together, which is simple to assemble and has low cost.

[0035] Specifically, the top of the bullet head 5 is set to be hemispherical to reduce the friction of the bullet head 5 sliding along the wavy slot 102. Preferably, the bullet head 5 is a metal bullet head 5; the wavy slot 102 is a nylon wavy slot 102. Function: By setting the top of the bullet head 5 to be hemispherical, the friction between the bullet head 5 and the wavy slot 102 can be reduced, and the appropriate selection of materials can extend the service life of the utility model.

[0036] Specifically, a plurality of raised ribs 104 are arranged at intervals around the outer circumferential surface of the hand wheel 1 to achieve anti-slip effect. Function: The arrangement of the plurality of raised ribs 104 can increase the friction between the operator's palm and the surface of the hand wheel 1 to achieve an anti-slip effect.

[0037] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A new type of knob structure, characterized in that: The invention comprises a hand wheel (1), a housing (2), an adjustable resistor (3), and a PCB board (4) which are arranged in sequence from top to bottom. A rotating shaft (101) extending vertically downward is fixedly arranged at the bottom of the hand wheel (1). A buckle (1011) is arranged at the bottom end of the rotating shaft (101). The rotating shaft (101) passes through the housing (2), the adjustable resistor (3), and the PCB board (4) downward, and is snap-connected with the bottom of the PCB board (4) through the buckle (1011). A mounting hole (201) with an opening facing upward is arranged on one side of the housing (2) facing the hand wheel (1). A bullet head (5) and a spring (6) are arranged in sequence from top to bottom inside the mounting hole (201). A wave-shaped slot (102) which is matched with the bullet head (5) is also arranged around the bottom of the hand wheel (1). The hand wheel (1) can be locked in position with the bullet head (5) through the wave-shaped slot (102).

2. According to claim 1, the novel knob structure is characterized in that: A column (202) extending vertically upward is provided in the middle of the housing (2); the mounting holes (201) are arranged at intervals on the sides of the column (202); a first through hole (2021) penetrating from top to bottom is provided on the column (202); the first through hole (2021) is matched with the rotating shaft (101); and the hand wheel (1) is rotatably matched with the housing (2) via the rotating shaft (101).

3. According to claim 2, the novel knob structure is characterized in that: A baffle (203) extending vertically upward is also provided on the side of the column (202), and the baffle (203) is fixedly connected to the column (202). A curved wall (103) extending vertically downward is also provided on the bottom of the hand wheel (1), and the curved wall (103) is arranged at intervals on the side of the rotating shaft (101). The hand wheel (1) is limited by the curved wall (103) and the baffle (203) of the housing (2) to limit the rotation range of the hand wheel (1).

4. According to claim 3, the novel knob structure is characterized in that: The center line of the column (202) is higher than the center line of the mounting hole (201).

5. According to claim 1, the novel knob structure is characterized in that: A cavity for accommodating an adjustable resistor (3) is provided at the bottom of the housing (2), and the adjustable resistor (3) enters the cavity of the housing (2) upwards.

6. According to claim 5, the novel knob structure is characterized in that: The adjustable resistor (3) is provided with a second through hole (301) penetrating vertically in the middle thereof, a circular ring (7) is arranged inside the second through hole (301), and the circular ring (7) is rotatably matched with the adjustable resistor (3) through the second through hole (301); the inner side of the circular ring (7) is provided with a square clamping groove (701), and the rotating shaft (101) is provided with a square clamping position (1012) which forms a close contact with the square clamping groove (701).

7. A novel knob structure according to any one of claims 1 to 6, characterized in that: The buckle (1011) is generally in the shape of a truncated cone that is larger at the top and smaller at the bottom. A gap is provided in the middle of the buckle (1011), and the left and right sides of the gap are provided as movable walls.

8. According to claim 7, the novel knob structure is characterized in that: A third through hole (401) is provided in the middle of the PCB board (4) and passes through the third through hole (401) downwards. The rotating shaft (101) passes through the third through hole (401) downwards and is engaged with the PCB board (4) through two movable walls to limit the range of downward movement of the PCB board (4).

9. A novel knob structure according to any one of claims 1 to 6, characterized in that: The top end of the bullet head (5) is configured to be hemispherical, so as to reduce the friction of the bullet head (5) sliding along the wavy groove (102).

10. A novel knob structure according to any one of claims 1 to 6, characterized in that: The outer circumferential surface of the hand wheel (1) is provided with a plurality of raised ribs (104) at intervals to achieve anti-slip properties.

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