JPH0635512Y2 - Small electrical equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a small electric device such as a tabletop cleaner or a pencil sharpener that functions by driving a motor,
The present invention relates to a structure in which a power unit including a power source and other components are detachably connected.

[Background of the invention]

2. Description of the Related Art Conventionally, there has been known a multifunctional electric device in which a so-called power unit including a power supply unit, a motor, etc., is selectively used as a functional attachment having a cleaner function or the like as needed.

As shown in FIG. 5, this kind of combined-type electric device usually has a drive switch 55 on the power unit 51 side, and the motor 52 in the power unit is driven by operating this drive switch 55. Since the drive shaft 53 of the motor 52 and the rotary shaft 56 of the functional attachment 54 are connected to each other, for example, the suction fan or the like functions by driving the motor 52 and can be used as a desk cleaner.

However, the power unit 51 is a functional attachment.
Since the motor 52 rotates by turning on the drive switch 55 regardless of whether 54 is connected or not, the functional attachment 54
If you accidentally turn on the switch 55 when the
Not only is the power source 57 wasted, but the motor drive shaft 53 that rotates at high speed is exposed, which is dangerous.

Therefore, as shown in FIG. 6, a safety switch 60 interlocking with the connection between the attachment and the power unit is provided to prevent the motor from being driven when the attachment is not connected,
It is conceivable to eliminate the above drawbacks.

However, in any of the above cases, since the drive switch exists only on the side of the power unit 51, the electrical equipment configured by each attachment connection is located in the same position, although the purpose of use and usage are different. In addition, only switches having the same shape can be set, which may cause inconvenience.

Further, if the individual drive switches are provided on the respective attachment sides, the above-mentioned drawbacks can be solved, but since the switches are provided for the respective attachments, the cost increases, which is not preferable.

[Purpose of device]

Therefore, the present invention comprises a power unit having a switch and a circuit open unit interposed between a power supply unit and a motor, and a plurality of types of attachments detachably connected to the power unit and functioning by driving the motor. In the power unit, the circuit open part is formed as a terminal on the surface facing the connection with the attachment, and the plurality of types of attachments are electrically connected to the terminal when the attachment and the power unit are connected. In a small electric device provided with a receiving portion, the plurality of types of attachments, the terminal receiving portion is formed by a short-circuit piece for short-circuiting the power unit side terminal, and the terminal receiving portion is formed in the attachment It can be used as a switch on the power unit side by configuring it with the one connected to the drive switch. In the case where it is convenient, without providing a switch on the attachment side, the switch on the power unit side is used as a drive switch, and when the switch on the power unit side is not convenient, a separate drive switch can be provided on the attachment side. .

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the storage state of each attachment of the dual-purpose electric device according to the present invention, which is connected to the power unit 1 or each functional attachment 2, 3, 4 in a tubular shape, and is integrated in a compact form. ing.

The power unit 1 can be connected to each of the functional attachments 2, 3, and 4, for example, by connecting the power unit 1 and the fan attachment 2, it can be used as a blower, and when connected to the cleaner attachment 3, a tabletop cleaner, a pencil sharpener. When connected to the attachment 4, it can be used as a pencil sharpener.

As shown in FIG. 2, the power unit 1 has a motor 5, a battery 6 as a power source, and a switch 7 built therein. Reference numeral 8 is an operation button of the switch 7.

First, the case where the cleaner attachment 3 and the power unit 1 are connected will be described. The drive shaft 9 of the motor 5 has a radial groove about the shaft as a means for transmitting the rotational force to the rotary shaft 13 of the fan 15 on the cleaner attachment 3 side. The formed rotation transmitting portion 10 is formed, and the above-described rotation transmitting portion is provided on the attachment 3 side when the attachment 3 is connected.
It is fitted with a receiving portion 14 having a substantially circular shape with 10 and interlocks with the rotation of the motor 5.

11a and 11b are terminals extending from the (+) side and (-) side of the battery b to the outside of the power unit 1, respectively.
Via a motor 5 and a switch 7.

The terminals 11a and 11b are the circuit opening portion 11 when the cleaner attachment 3 is not connected, and the motor 5 does not operate at all even when the operation button 8 is operated and the switch 7 is turned on. However, when the connecting portion 16 of the cleaner attachment 3 and the connecting portion 12 of the power unit 1 are connected, the short-circuit piece 19 as a terminal receiving portion made of a copper plate or the like formed on the facing surface of the terminals 11a and 11b of the cleaner attachment 3 is formed. The terminals 11a and 11b are brought into contact with each other, and conduction between the terminals 11a and 11b is obtained.

That is, the power from the battery 6 can be supplied to and stopped from the motor 5 only when the power unit 1 and the cleaner attachment 3 are connected, and when the operation button 8 is operated, the fan 15 rotates and sucks dust from the suction port 17.

18 is a brush planted on the bottom surface so that dust can be easily sucked in.

Next, a case where the pencil sharpener attachment 4 is connected to the power unit 1 will be described.

FIG. 3 shows a state in which the pencil sharpening attachment 4 is connected to the power unit 1 described above, and inside the attachment 4, a sharpening portion 21, a rotating body 23, a speed reducing portion 25 and the like are arranged. 22 is a shavings storage section.

Reference numeral 24 denotes a receiving portion which can be fitted into the rotation transmitting portion 10 on the side of the power unit 1 described above. The receiving portion 24 is interlocked with the rotation of the motor 5, and the rotating body 23 and the scraping portion 21 are decelerated and rotated via the reduction portion 25. Reference numeral 28 denotes a driving piece which is interlocked with the insertion of the pencil A and in which contact springs 26a and 26b configured as the driving switch 26 move in a closing direction. The contact springs 26a and 26b are terminal receiving portions 29a and 29b formed at positions facing the power unit 1, respectively.
When the power unit 1 and the pencil sharpener attachment 4 are connected by the connecting portions 12 and 30, the power unit 1 side terminals 11a and 11b and the attachment side terminal receiving portions 29a and 29b are electrically connected. It is a thing.

That is, when the power unit 1 and the attachment 4 are connected, the motor 5 of the power unit 1 does not drive even if only the switch 7 on the power unit 1 side is turned on, and the switch 7 of the power unit 1 is turned on to the attachment 4 side. When the drive switch piece 26 provided is operated (the pencil A is put in and out), the motor 5 on the power unit 1 side can be driven and stopped.

Therefore, turn on the operation button 8 of the power unit 1,
When the pencil A is inserted, the drive switch piece 28 moves and the contact springs 26a and 26b come into contact with each other. Then, the (+) side of the battery 6 −
Motor 5-Switch 7-Terminal 11a-Terminal 29a-Contact spring 26
A closed loop of a-contact spring 26b-terminal 29b-terminal 11-(-) side of the battery 6 is formed, and the motor 5 rotates. Motor 5
Rotation of the power unit 1 is transmitted to the attachment 4 side by fitting the rotation transmission portion 10 on the power unit 1 side and the receiving portion 24 on the attachment 4 side, and the transmitted rotational force is reduced by the reduction portion 25 and the rotating body 23 and the scraping member. Rotate part 21 and sharpen the pencil.

The case where the power unit 1 is connected to the cleaner attachment 3 and the case where the pencil sharpener attachment 4 is connected have been described above. However, when the power unit 1 is connected to the fan attachment 2, the connection structure is the same as when the cleaner attachment 3 is connected. . As the attachment, the above fan attachment, cleaner attachment,
In addition to the pencil sharpener attachment, various devices that use the rotational force of the motor are conceivable, such as an electric razor,
It may be an attachment such as a light that uses a rotation eraser or a dynamo to change the rotational force of the motor into electric power. In particular, the eraser attachment 34 shown in FIG.
In the case of, it is inconvenient to control the rotation of the motor 5 by the operation button 8 of the switch 7 on the power unit 1 side, so that the switch body 35 is provided on the attachment 34 side like the pencil sharpening attachment 4 described above. It is desirable to control the rotation of the motor 5 by operating the switch body 35. In this case, the connection structure between the attachment 34 and the power unit 1 is the same as the connection structure between the pencil sharpening attachment 4 and the power unit 1.

[Other Embodiments] Although dry batteries are used as the power supply unit in the above-described embodiments, rechargeable batteries may be used, or an AC type using a commercial power supply may be used.

As described above, according to the present invention, the power unit 1 including the switch 7 and the rotation opening portion 11 between the power source unit 6 and the motor 5, and the power unit 1 which is detachably connected to the power unit 1, drives the motor 5. A plurality of types of attachments 2, 3 and 4 functioning according to the above, and the circuit opening 11 is formed on the power unit 1 as a terminal 11a and 11b on the surface facing the connection with the attachments 2, 3 and 4. And the attachments for the above-mentioned multiple attachments 2, 3 and 4
In a small electric device provided with terminal receiving portions 19, 29a, 29b which are electrically connected to the terminals 11a, 11b when the power units 1, 2, 3 and 4 are connected, a plurality of types of attachments 2,
3, 4, the terminal receiving portion is formed by a short-circuit piece 19 that short-circuits the terminals 11a, 11b on the side of the power unit 1, and the terminal switch receiving portions 29a, 29b are formed on the attachment switch 4 as a drive switch 26. Since it is configured to be connected, even if various attachments with different purposes and conditions of use are connected with the same power unit, the switch operability is not impaired, and the switch button is located at the position where it is the easiest to operate. If it is possible to arrange it, and if a switch button is not required on the special attachment side, you can operate only the switch button on the power unit side by forming a short-circuit piece on the attachment, so you do not need to form a switch button unnecessarily Moreover, it can be implemented with a simple structure as a whole, and the increase in cost can be suppressed.

[Brief description of drawings]

1 is a perspective view of a small electric device according to the present invention, FIG. 2 is a sectional view when used as a desk cleaner, FIG. 3 is a sectional view when used as a pencil sharpener, and FIG. 4 is an electric motor. Sectional view when used as an eraser, Fig. 5 and 6
The figure is a cross-sectional view showing a conventional example. 1 …… Power unit, 2,3,4 …… Attachment, 5
...... Motor, 6 ...... Power supply section, 7 ...... Switch, 11 ...... Circuit opening section, 19 ...... Terminal receiving section, 26 ...... Drive switch, 29
...... Terminal receiving part.

Claims (1)

[Scope of utility model registration request] 1. A power unit 1 in which a switch 7 and a circuit opening 11 are interposed between a power source 6 and a motor 5, and a plurality of types which are detachably connected to the power unit 1 and function by driving the motor 5. Of the power unit 1, the circuit opening portion 11 is formed as a terminal 11a, 11b on the surface facing the connection with the attachments 2, 3, 4 in the power unit 1. Seed attachments 2,3,4 include attachments 2,3,4 and power unit 1
In a small electric device provided with terminal receiving portions 19, 29a, 29b electrically connected to the terminals 11a, 11b at the time of coupling,
The attachments 2, 3, 4 of the plurality of types, the terminal receiving portion is formed by the short-circuit piece 19 for short-circuiting the terminals 11a, 11b of the power unit 1 side, and the terminal receiving portion 29a, 29b in the attachment 4 A small electric device, which is configured to be connected to the formed drive switch 26.