JP5515736B2 - Charge impact driver - Google Patents

Description

  The present invention relates to a charging impact driver, and more particularly, to a charging impact driver that improves the environmental resistance as well as the assemblability.

  Generally, a charging impact driver, which is a portable electric tool, includes a board (control board) on which a control circuit for controlling the maximum number of revolutions of a motor and the like and an operation panel including an operation unit for switching the operation mode of the tool. The control board and the operation panel are assembled to the main body housing.

  For example, the following portable electric tools are known as related arts. In this prior art, a printed circuit board on which a control circuit is mounted is disposed on a front projecting portion on a lower side of a grip in a housing, and an operation unit for switching an operation mode is provided in the area of the display setting unit (for example, Patent Documents). 1).

Japanese Patent No. 4111173

  In the prior art described in Patent Document 1, an operation unit (outer part) for switching the operation mode is provided independently as an operation panel, and is separated into a printed circuit board on which a control circuit is mounted. By the way, a printed circuit board or the like assembled in a portable charging impact driver is required to improve environmental resistance such as dustproof and moistureproof. For this purpose, a resin coating is usually applied to the printed circuit board. Etc. are performed. However, in the above case, the assembly process of the operation unit for the printed circuit board on which the control circuit is mounted and the resin coating process are separate processes, and the resin coating process is a manual operation and causes a decrease in productivity. become.

  Therefore, there is a technical problem to be solved in order to efficiently integrate the substrate and the operation panel to improve the assemblability and the environmental resistance, and the present invention aims to solve this problem. And

The present invention has been proposed in order to achieve the above object, a first aspect of the present invention, a motor is rotating source, set operation signal by the operation unit and an operation unit for switching operation the operation mode in the charging impact driver having a board mounted with the necessary electronic components, and a manipulation panel provided at a position corresponding to the operating unit including the components of a control circuit for controlling the motor based on,
The substrate is housed in a case portion having a side plate portion, and the operation panel is inserted into the case so that the substrate and the operation panel have a required assembly structure, and is dropped into the case and solidified. Provided is a charging impact driver in which the substrate and the operation panel are integrated with a potting material.

  According to this configuration, when assembling the substrate and the operation panel, the operation panel is inserted into a case containing the substrate and subjected to a potting process so that the substrate and the operation panel are integrated with a required assembly structure. In addition, a required part of the substrate and the operation panel is coated with a thermosetting resin such as an epoxy type or a silicone type which is a potting material.

  According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a tact switch and an LED which are mounted on the substrate, the required portion faces the operation panel, and at least the required portion should avoid being embedded in the potting material. A charging impact driver is provided in which a partition wall for blocking the potting material at the time of dripping is provided at least around the required portion of an electronic component including the electronic component.

  According to this configuration, electronic components such as tact switches and LEDs that are mounted on the board and have a required portion facing the operation panel are functionally integrated after the board and the operation panel are assembled together. It is necessary that the required part is exposed from the operation panel to the outside. Therefore, by providing a partition wall around at least the required part of these electronic components, at the time of assembling the substrate and the operation panel, at least the required part of the electronic component is embedded in the potting material. Thus, the required part is exposed from the operation panel to the outside.

  According to the first aspect of the present invention, when the substrate and the operation panel are assembled, the substrate and the operation panel are efficiently integrated only by performing a potting process, and a required portion is coated with a thermosetting resin. Thus, there is an advantage that environmental resistance such as dust proof and moisture proof is improved.

  In addition to the effect of the invention described in claim 1, the invention described in claim 2 further includes providing a partition wall around at least a required portion of the electronic component such as a tact switch and an LED, so that the substrate, the operation panel, At the time of assembly, it is avoided that at least a required part of the electronic component is embedded in the potting material, and the required part is exposed from the operation panel to the outside, and the function of these electronic components is improved. There is an advantage that it can be fully exhibited.

The figure shows a charging impact driver according to an embodiment of the present invention.
The longitudinal cross-sectional view which shows the internal structure of a charge impact driver. The perspective view which expands and shows the case which accommodated the board | substrate. The perspective view which shows the state which inserted the operation panel in the case which accommodated the board | substrate. The perspective view which shows the back surface of an operation panel part.

The present invention, in order to achieve the object of environmental resistance is also improved with assemblability by integrating the substrate and the operation panel efficiently, the motor is a rotational source, an operating unit for switching operation the operation mode a board mounted with a required electronic components that include components of a control circuit for controlling the motor based on the operation signals set by the operation unit, an operation panel provided at a position corresponding to the operating unit, In the charging impact driver, the substrate is accommodated in a case portion having a side plate portion, and the operation panel is inserted into the case so that the substrate and the operation panel have a required assembly structure. This was realized by integrating the substrate and the operation panel with a potting material dropped and solidified inside.

  A preferred embodiment of the present invention will be described below with reference to FIGS. First, the configuration of the charging impact driver according to the present embodiment will be described. As shown in FIG. 1, the charging impact driver 1 includes a cylinder 3 a in the housing 2, a motor 3 that is a rotation source, a planetary gear 4, a drive unit 5 that transmits the rotation of the motor 3 at a reduced speed, A part of the output shaft 6 that outputs the rotation output set by the drive unit 5 is internally provided. A battery pack mounting portion 2c is formed at the lower end of the grip portion 2b extending downward from the cylindrical portion 2a so as to protrude forward, and the battery pack 8 for storing the batteries 7,... Is attached to and detached from the battery pack mounting portion 2c. It is provided freely.

  And the operation panel 9 provided with the operation part which switches the operation mode of the said charge impact driver 1 in the part of the said battery pack attachment part 2c, and the said motor 3 based on the operation signal set by the said operation part A printed circuit board 10 on which required electronic components including components of a control circuit (not shown) to be controlled are mounted is incorporated. From the control circuit on the printed circuit board 10 or the like, a required signal line 11 is set up toward the motor 3 or the like in the cylindrical portion 2a.

  As shown in FIG. 2, the printed circuit board 10 is accommodated in a case 19 having a side plate portion 12, and the case 19 is formed in a low and high case shape. A control circuit (not shown) is mounted on the printed board 10 as described above. Further, on one side (the left side in the figure) of the printed circuit board 10 on which the operation panel 9 is assembled, two tact switches 14, and four LEDs 15, between the two tact switches 14,. Are implemented in a row at the required intervals.

  The two tact switches 14,... Function as the operation unit, and the four LEDs 15,... Function as display elements such as the switched operation mode and the remaining amount of the batteries 7,. Since the tact switch 14 and the LEDs 15,... Each have such a function, the drive pin 14a can be driven and exposed to the outside in terms of the required portion, that is, the tact switch 14. For the LEDs 15,..., It is necessary that the light emitting surface be exposed to the outside.

  FIG. 3 shows a state in which the operation panel 9 is inserted into the printed circuit board 10 accommodated in the case 19 so as to have a required assembly structure. In this assembly mode, each drive pin 14a in the two tact switches 14,... Is exposed to the outside so as to be drivable from the portion of the round hole 16, and each light emitting surface in the four LEDs 15,. From the portion of the square hole 17 to the outside, it is in an apparent state.

  The printed circuit board 10 and the operation panel 9 are subjected to a potting process as will be described later in order to integrate the two in such a required assembly mode. At the time of the potting process, the tact switch 14,... Has a lower end side inner peripheral edge 16a (see FIG. 4) of the round hole 16 so that the potting material does not flow through the drive pin 14a. It closely contacts the upper surface of the part 14b. Accordingly, in the tact switch 14, the inner peripheral surface of the round hole 16 serves as a partition wall that blocks the potting material during the potting process.

  Further, at each LED 15 portion, the lower end of the rectangular tube 18 (see FIG. 4) extending downward from the square hole 17 is printed so that the potting material does not flow to the light emitting surface portion during the potting process. Close contact with the surface of the substrate 10. Accordingly, in each LED 15 portion, each square tube 18 becomes a partition wall that blocks the potting material during the potting process. Furthermore, a low and high partition wall 9a is also erected around the upper surface of the operation panel 9 (see FIG. 3).

  In the state where the preparation as described above is performed, a potting process is performed, and a potting material (not shown) is dropped and solidified in the cased printed circuit board 10, and the printed circuit board 10 and the operation panel 9 are connected to each other as required. It is integrated with an assembly structure. After the integration, on the upper surface of the operation panel 9, the round hole 16 portion above each drive pin 14a in the tact switch 14,... And the square hole 17 portion above each light emitting surface in the LEDs 15,. A thin plastic sheet (not shown) having flexibility is attached.

  Next, the operation of the charging impact driver configured as described above will be described. When the printed circuit board 10 and the operation panel 9 are assembled, the operation panel 9 is inserted into the printed circuit board 10 accommodated in the case 19 so as to have a required assembly structure, and a potting material is dropped into the case 19. By performing the potting process, the printed circuit board 10 and the operation panel 9 are integrated with a required assembly structure. Also, together with this, the required electronic components including the components of the control circuit mounted on the printed circuit board 10 and the tact switch 14 functioning as an operation unit, an epoxy system in which a part such as the casing unit 14b in the tact switch 14 is a potting material, It is coated with a thermosetting resin such as silicone.

  During the potting process, the inner peripheral surface of the round hole 16 serves as a partition wall for blocking the potting material, and the driving pin 14a is embedded in the potting material. Can be avoided. Moreover, with respect to the light emission surface in each LED15, it can be avoided that each square tube 18 becomes a partition wall and the light emission surface is embedded in the potting material.

  As described above, in the charging impact driver according to this embodiment, when the printed circuit board 10 and the operation panel 9 are assembled, the printed circuit board 10 and the operation panel 9 are efficiently integrated only by performing a potting process. At the same time, the required electronic components mounted on the printed circuit board 10 are coated with a thermosetting resin as a potting material, thereby improving the environmental resistance such as dustproof and moistureproof.

  A partition wall is provided around each required portion such as a light emitting surface of the drive pin 14a and the LEDs 15 in the tact switch 14,... When the printed circuit board 10 and the operation panel 9 are assembled. The required portions are prevented from being embedded in the potting material, and the respective required portions are exposed from the operation panel 9 to the outside, and the functions of the electronic components such as the tact switch 14 and the LEDs 15,. It can be fully demonstrated.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

  Applicable to portable power tools that have a board on which required electronic components are mounted and an operation panel, and it is essential to efficiently integrate the board and the operation panel to improve assembly and environmental resistance. It is possible.

DESCRIPTION OF SYMBOLS 1 Charging impact driver 2 Housing 3 Motor 4 Planetary gear 5 Drive part 6 Output shaft 7 Battery 8 Battery pack 9 Operation panel 10 Printed circuit board (board | substrate)
11 Signal line 12 Side plate part 14 Tact switch 15 LED
16 round holes
Inner peripheral edge (surface) of 16a round hole 16 (potting material blocking partition wall)
17 square hole 18 square tube (potting material blocking partition wall)
19 cases

Claims (2)

A motor as a rotation source;
A board mounted with a required electronic components that include components of a control circuit for controlling the motor based on the set operation signal by the operation unit and an operation unit for switching operation of the operation mode,
An operation panel provided at a position corresponding to the operation unit;
In charge impact driver with
The substrate is accommodated in a case portion having a side plate portion,
The operation panel is inserted into the case so that the substrate and the operation panel have a required assembly structure, and the substrate and the operation panel are integrated by a potting material that is dropped and solidified in the case. Charging impact driver characterized by that. At the time of the dripping, at least around the required portion of the electronic component including the tact switch and the LED, which is mounted on the substrate, the required portion faces the operation panel, and at least the required portion should be prevented from being embedded in the potting material. The charging impact driver according to claim 1, further comprising a partition wall that blocks the potting material.

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