JPH0716480Y2 - Power unit for small electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a power unit of a small electric device, and can be applied to both a drive unit requiring a motor and a drive unit not requiring a motor. It is a thing.

(Background of the Invention) As a small electric device, as shown in FIG. 9, a power unit 50 having a power supply unit 51 and drive unit units 55, 56, 57 having tool heads 52, 53 and a light bulb 54 are separately provided. It is known that the power unit 50 can be shared as a power source for a plurality of drive unit units 55 to 57 by forming it physically and connecting the drive unit units 55 to 57 to the power unit 50 interchangeably. . However, since the power unit 50 is not provided with a motor, the drive unit 55, 56 having a drive unit such as the tool head 52, 53, which requires a motor, has a motor M, respectively. There is a problem in that it has to be arranged, and the cost increases accordingly.

For this reason, it is conceivable to dispose a motor M in the power unit 50 as shown in FIG. However, in such a case, it is preferable to connect the drive unit units 55 and 56 having the drive unit that requires the motor M such as the tool heads 52 and 53, but the drive unit that does not require the motor M such as the light bulb 54. Even when the drive unit unit 57 having the above is connected, the motor M of the power unit 50 unnecessarily rotates.

(Object of the Invention) The present invention has been made in view of the above circumstances, and includes either a drive unit including a drive unit that requires a motor or a drive unit including a drive unit that does not require a motor. It aims at providing the power unit applicable also to.

(Summary of the Invention) The present invention is a power unit including a main body case in which a power supply unit and a motor are arranged. The power unit includes a loop including the motor and the power supply unit, and a power supply unit 6 not including the motor. An electric circuit having a loop is wired, and each loop is provided with a terminal portion that is selectively connected to a terminal portion of a drive unit that is detachably connected to the main body case.
With this configuration, when the drive unit including the drive unit that requires the motor is connected, the loop including the motor is closed and the drive unit including the drive unit that does not require the motor is formed. When the sub-units are connected, the loop not including the motor is closed so that the motor does not rotate unnecessarily.

(Embodiment) An embodiment of the present invention will be described by taking a small electric device of a type in which a plurality of drive unit units are connected to a power unit as an example.

FIG. 1 is a side view of a handheld small electric device in a connected state,
FIG. 2 is a cross-sectional view showing a power unit 1, a cleaner unit 2 as a drive unit, and a light unit.
3. The pencil sharpener 4 is sequentially connected in a removable manner. Each of the units 1 to 4 has a cylindrical shape, and the overall shape in which these units are connected is an oblong shape. Each drive unit 2, 3, 4 is interchangeably connected to the power unit 1 to be used as a common power supply unit, and each unit 1 to 4 is integrally connected and stored and carried. Then, each of the units 1 to 4 will be described in order with reference to the drawings.

First, the power unit 1 will be described with reference to FIGS. 2, 3, and 4. The power unit 1 has a cylindrical main body case 5 as a main body, a motor M is disposed in the center of the inside thereof, and a plurality of (four) power supply batteries 6 are housed around the motor M. The power battery may be a rechargeable battery. 7
Is a frame for supporting the motor M, and 8 is a rib for supporting the battery 6. As is clear from FIG. 4, the heavy battery 6 is mounted on the wall surface of the main body case 5 by the slide type switch unit 10
Are arranged in a concentrated manner along the peripheral wall surface on the opposite side, and thus the center of gravity line A of the power unit 1 is considerably deviated from the axial center line NA toward the battery 6 side. This is the center of gravity line A
By displacing the power unit 1 as shown in FIG. 4, even if the power unit 1 is laid down on its side and placed on a desk or the like, the center of gravity line A is set to the lower side and the power unit 1 is stabilized.
Can be prevented from rolling unnecessarily and being damaged by colliding with equipment or falling from a desk. Further, since the switch portion 10 is on the surface opposite to the center of gravity line A, that is, the upper surface, it is possible to prevent the switch portion 10 from being grounded and damaged. 11 is a switch body disposed inside the switch portion 10, 12 is a battery lid attached to the bottom of the main body case 5, and 13 is a ring-shaped elastic member such as a rubber ring attached to the lower surface of the battery lid 12. It is a grounding body made of material.

Reference numeral 14 denotes a rotation transmission joint mounted on the rotation shaft of the motor M, and is a recess formed in the center of the upper surface of the main body case 5 so as not to be damaged by an object or the like when the power unit 1 is handled alone. It is arranged inside the insertion part 15. 16,17,
Reference numeral 18 denotes a terminal portion made of a spring material arranged on the upper surface of the main body case 5, and connected to the battery 6 and the motor M by a lead wire (not shown). Numerals 20 and 20 are ribs projecting in an arc shape on both side portions of the terminal portions 16 to 18. Numerals 19 and 19 are a pair of engaging portions formed in a groove shape on the outer wall portion of the connecting portion 9 projectingly provided on the upper portion of the main body case 5, and are formed at positions facing each other in the radial direction. Engaging portions 39, 39 projecting like ribs at the bottom of the portion 2 (see FIGS. 2 and 6)
Is engaged with the engaging portions 19 and 19, and the engaging portion 19 and the engaging portion 39 are engaged with each other by rotating around the shaft center line NA, whereby the cleaner portion 2 is detachably connected to the power unit 1. It The respective units 3 and 4 described in detail later are also connected by the same means.
Next, the cleaner portion 2 will be described with reference to FIGS. 2, 5, and 6.

The cleaner portion 2 is mainly composed of a cylindrical main body case 21, and a fan portion 22 is arranged inside thereof. The fan unit 22 is formed by rotatably mounting a dust suction fan 24 on a disk-shaped base plate 23. Reference numeral 25 is a joint mounted on the rotary shaft of the fan 24. When the cleaner unit 2 is connected to the power unit 1, the joint 25 is inserted into the recess 15 and the joint is formed.
14 is engaged, and the rotation of the motor M is transmitted to the fan 24.
In FIG. 2 and FIG. 6, reference numeral 42 denotes an engaging rib of the base plate 23, and the fan portion 22 is detachably accommodated in the main body case 21 by engaging the base plate 23 with the rib 42. The base plate 23 is fixed to the inside of the main body case 21, so that the joint 25 is located inside the main body case 21 so as not to be damaged by hitting other objects. 26 is a fitting
It is a rib for protecting the joint 25 that is erected around the periphery of the arc 25 and also serves as a holding portion for the fan portion 22. Reference numeral 27 is a terminal portion that comes into contact with the terminal portions 17 and 18 and short-circuits both terminal portions 17 and 18. The ribs 20 and 20 are the terminal portions 16 to 1 of the terminal portion 27.
The pressure limit to 8 is specified.

29 is a dust suction hole formed in the center of the upper surface of the main body case 21, the second
In the figure, 30 is a partition plate that is detachably attached to the cylindrical portion 31 of the dust suction hole 29, a dust collection chamber 32 is formed below the partition plate 30, and between the partition plate 30 and the base plate 23. In the fan room
38 is formed. 33 is a communication port formed in the partition plate 30 for dropping the dust sucked by the fan 24 into the dust collecting chamber 32. Reference numeral 36 denotes an exhaust hole, which is formed in three lines on the peripheral body surface of the main body case 21. Reference numeral 37 is a holding rod for the partition plate 30 which is erected on the base plate 23. The reference numeral 34 designates a grounding body projecting three around the dust suction hole 29, which is made of an elastic material such as rubber,
The grounding body 34 is grounded on the upper surface of the desk or the like, and is slid along the upper surface to suck dust on the desk through the dust suction holes 29. Reference numeral 35 denotes a protrusion that is formed to form an engaging portion 19 with the light portion 3 and to secure a gap necessary for inflowing air from the lateral direction with the grounding body 34 grounded. , Is gradually lowered from the outer peripheral side toward the dust suction hole 29.

In FIG. 2, the light section 3 is mainly composed of a cylindrical main body case 40, and a light bulb 41 and a reflecting mirror 47 are disposed inside the main body case 40. Reference numeral 43 is a recessed portion, and an illumination lens 44 is disposed slightly inward thereof. With the light portion 3 connected to the power unit 1, the terminal portion 27 thereof contacts the terminals 16 and 18,
When the switch unit 10 is turned on, the light bulb 41 lights up. Next, the pencil sharpener 4 will be described with reference to FIGS. 2 and 7.

The pencil sharpening part 4 is mainly composed of a cylindrical main body case 50, and inside thereof, a pair of rotary blades 51, 52 driven by the motor M of the power unit 1 are arranged. 53 is a rotating blade 5
It is a turntable equipped with 1,52. Reference numeral 54 is a pencil insertion hole in which a switch unit 55 to be turned on by the inserted pencil is arranged. The heavy rotating blades 51, 52 are arranged at positions deviated from the axial center line NA, so that the center of gravity line B of the pencil sharpening part 4 is considerably deviated from the axial center line NA, and is inserted. The hole 54 is formed on the center line B. By thus forming the insertion hole 54 on the center-of-gravity line B, the center of gravity balance when carrying out the pencil sharpening while holding the pencil sharpening part 4 in the hand is improved, and the pencil sharpening is facilitated. In addition, the pencil sharpener 4 is replaced with the power unit 1 described above.
The center of gravity line B is displaced to the same side as the above center of gravity line A in the state of being connected to
Is considerably deviated to the same side as the center of gravity lines A and B of the units 1 and 4. That is, the center of gravity lines of these units 1 and 4 are deviated from the axis center line NA in both the single state and the connected state, and are prevented from rolling unnecessarily even if they are laid sideways. Reference numeral 56 is a dust case detachably attached to the side wall portion of the main body case 50, and reference numerals 57, 58 and 63 are ribs and engaging holes for engagement. Reference numeral 59 is a gear chamber formed in the lower portion of the main body case 50, in which a plurality of gears 60 are housed. Reference numeral 25 denotes a joint, and when the main body case 50 is connected to the power unit 1, the joint 25 engages with the joint 14, the rotation of the motor M is decelerated by each gear 60, and the turntable 53 and the rotary blade 51, Transmitted to 52. Also, this joint 25
As shown in FIG. 2, it is housed inside the recess 43 in a state of being connected to the light unit 3. Reference numerals 62 and 62 denote terminal portions provided on the bottom of the main body case 50, which are connected to the switch portion 55 and come into contact with the terminal portions 17 and 18. Next, the electric circuit provided in the power unit 1 will be described with reference to FIG.

As described above, the power unit 1 houses the power supply battery 6 and the motor M, and the upper surface thereof has three terminal portions 16
~ 18 are provided. This electric circuit is composed of the battery 6, the switch section 10, the terminal sections 17, 18 and the loop A in which the motor M is connected in series, and the battery 6, the switch section 10, the terminal sections 16, 18 and does not include the motor M. It has loop B. Terminal part 18
Is a common terminal part of both loops A and B. When cleaning the desk or the like with the cleaner unit 2, the cleaner unit 2 is connected to the power unit 1. Then, the terminals 17 and 18 are short-circuited by the terminal 27 and the loop A including the motor M is closed. When the switch 10 is turned on, the motor M is driven and the fan 24 is rotated. If it is slid along a desk or the like, dust on the desk is sucked into the dust collection chamber 32 through the dust suction hole 29. When the pencil sharpener 4 is connected to the power unit 1, the terminals 62 and 62 are connected to the terminals 17 and 18, and when the pencil is inserted into the insertion hole 54, the switch 55 is turned on and the motor M is driven. The rotary blades 51, 52 rotate to perform pencil sharpening. When the light section 3 is connected to the power unit 1, the terminal section 27 of the light section 3 comes into contact with the terminal sections 16 and 18, and the switch section 1
When 0 is input, the light bulb 41 lights up. In this case, the loop A including the motor M is open, and therefore the switch unit
Even if 10 is turned on, the motor M is not driven. By providing the power unit 1 with the two loops A and B as described above,
The invention can be applied to both the drive unit units 2 and 4 that require the motor M and the drive unit unit 3 that does not require the motor.

(Effect of the Invention) As described above, the power unit 1 according to the present invention is
The power supply unit 6 and the motor M are arranged in the main body case 5, and the loop A including the motor M and the loop B not including the motor M are wired, and the loops A and B are attached to and detached from the main body case 5. Since the terminal portions 16 to 18 which are selectively connected to the terminal portions of the driving unit units 2, 3, and 4 which are freely connected are provided,
The invention can be applied to both the drive unit units 2 and 4 that require the motor M and the drive unit unit 3 that does not require the motor.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 is an overall side view of a small electric device, FIG. 2 is an overall sectional view, FIG. 3 is a perspective view of a power unit, and FIG. 4 is a sectional view. 5 and 6 are perspective views of the cleaner portion, FIG. 7 is a perspective view of the pencil sharpening portion, FIG. 8 is an electric circuit diagram, and FIGS. 9 and 10 are electric circuit diagrams of a conventional one. 1 …… Power unit 2,3,4 …… Drive unit 5 …… Main body case 6 …… Power supply unit 16,17,18 …… Terminal unit A …… Loop B …… Loop M …… Motor

Claims (2)

[Scope of utility model registration request] 1. A power supply unit 6 and a motor M are provided in a main body case 5, and a loop A composed of the motor M and the power supply unit 6 and a power supply unit 6 not including the motor M are provided. A drive unit in which a power supply circuit having a loop B is connected and each of the loops A and B is detachably connected to the main body case 5.
A power unit for a small electric device, characterized in that terminal portions (16-18) selectively connected to the terminal portions (2, 3, 4) are provided. 2. One terminal portion 1 of each of the loops A and B
8. The power unit for a small electric device according to claim 1, wherein 8 is a common terminal portion.