JPH0231710Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hand mixer, and its purpose is to provide an inexpensive hand mixer with a simple structure.

In a conventional hand mixer, a terminal plate is fixed to the upper part of an extrusion member that pushes out a stirring member, and a switch dial is pivotally supported on the terminal plate and rotated, so that a sliding plate interlocked with the switch dial is moved onto the terminal plate. The motor is constructed so that starting, stopping, and shifting are performed by sequentially contacting a plurality of contacts, and the structure is complicated, and the number of parts increases, making it expensive.

The present invention has been devised to eliminate these drawbacks and provide an inexpensive hand mixer.

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 indicates an upper body, 2 a lower body, and three screw holes 3 for screwing together.
4 and 5 are provided on the lower body. Also, a pair of gears 6 are pivotally supported by the lower body, and as shown in FIG. A protrusion 11 is formed to hold the rotor 12.
It is rotated by a threaded portion 13. A pair of metals 14 pivotally support the rotor.

Reference numeral 15 denotes a gear holding plate, in which a pair of holes 16 through which the upper parts of the pair of gears 6 protrude, a spring receiving part 17 and a metal holding part 18 are formed, and a substantially hook-shaped contact part 1 is formed.
9 is bent upward.

20 is a stator core, which is fixed to the lower main body 2 at its shoulder portion 21. 22 is a bobbin fixed to the core, and a plurality of slit-shaped locking holes 24 bored in a pair of front parts 23 have hook parts 25.
After the connecting portion 27 of the arm fixing fitting 26 is inserted, it is twisted and fixed, and the stator winding 28 is appropriately connected to the connecting portion 27 as shown in FIG. A brush arm 30 having a carbon brush 29 fixed to its tip is engaged with the hook portion 25 of the arm fixing fitting 26, and is fixed to the front surface of the bobbin 22 by the arm fixing fitting 26 as shown in the figure.

One of the pair of rear end portions of the bobbin 22 is formed to protrude to form a plate-shaped terminal portion 31, and three grooves 32, 33, 34 arranged in parallel in the terminal portion 31, and a bottom portion of each groove are provided. Each of the locking holes 35 to 37 has a substantially L-shaped contact plate 40 having a contact portion 38 and a connecting portion 39, similar to the arm fixing fitting 26. After the connecting part 39 is inserted,
It is fixed by twisting, and each groove 32 to 34 has a contact portion 38.
is accommodated.

The locking hole 36 drilled at the bottom of the middle groove 33 is located closer to the rear end of the bobbin 22 than the other two locking holes 35 and 37, so it is not disposed in the groove 33. Only the contact plate 40 is inserted and fixed with the front and back reversed compared to the other two. As a result, the distance between the connecting portions 39 protruding from the side surface of the terminal portion 31 is ensured, making it easy to connect the electric wires. A stator winding 28 and a diode 41 are appropriately connected to each connection portion 39 as shown in the figure.

Reference numeral 42 designates a switch dial, on both sides of which a pair of shaft parts 43 are protruded, one side of which is formed with an eave-like contact part 44, an operating protrusion 45 on the upper part, and an operating protrusion 45 on the lower part. are recesses 46, 47, 4
Cam surfaces 50 having numbers 8 and 49 are formed, respectively.

A pair of oval bearing portions 52 are formed below a substantially rectangular dial hole 51 bored in the upper end of the upper body 1, and by fitting the shaft portion 43 into the bearing portions 52, The switch dial 42 is arranged to be movable and rotatable in the vertical direction. When the switch dial 42 is turned to the maximum counterclockwise direction as shown in FIG.
A recessed portion 53 that comes into contact with and prevents further rotation.
is provided on the side of the dial hole 51, and in the vicinity thereof is a protrusion 54 that comes into contact with the contact portion 44 of the switch dial 42 to prevent the dial from sinking during operation.
is formed.

Reference numeral 55 designates an extrusion member, and a rod 56 that comes into contact with the cam surface of the switch dial 42 is rotatably disposed at the upper end thereof, and a rod 56 that engages with a guide portion 57 formed in the upper body 1 at the side surface. It has a sliding part 58 that allows the extrusion member 55 to slide in the vertical direction, and a pair of extrusion parts 59 that are inserted into the upper part of the gear 6 and can come into contact with the head of the stirring member 7 at the lower part, and a pressing A spring receiving portion 61 is formed to lock a coil spring 60 that urges the member 55 upward. 62 is a protrusion;
This is for holding the coil spring 60 between the push-out member 55 and the gear holding plate 15 by coming into contact with the contact portion 19 of the gear holding plate 15 . Extrusion member 5
A sliding plate 63 is fixed to the front part of the bobbin 22, and its tip is connected to the three grooves 3 formed in the bobbin 22.
2, 33, and 34, so that as the extrusion member 55 moves up and down, the tip of the sliding plate 63 also contacts the three contact portions 38. The structure is configured such that the contact points are sequentially contacted.

The present invention is constructed as described above, and its operation and effects will be described below. When the switch dial 42 is stopped, the switch dial 42 is rotated to the maximum clockwise as shown in FIG. A rod 56 with a far recess 49 at the upper end of the pusher member 55
The push-out member 55 has moved downward to the maximum extent, and the tip of the sliding plate 63 has separated from any of the contact plates 40, and the rotor 12 has stopped. In this state, when the switch dial 42 is further pressed downward, the eave-like contact portion 44 and the protrusion 5 of the upper body 1
Since the dial 42 does not come into contact with the extrusion member 5
5 and moves downward against the coil spring 60,
When the stirring member 7 is held within the gear 6, the pushing part 59 can press the head and push out the stirring member 7 downward.

When the dial 42 is rotated counterclockwise in FIG.
moves slightly upward. At this time, since the tip of the sliding plate 63 is configured to be located at the same height as the groove 34, it comes into contact with the contact plate 40 fixed to the groove 34,
The rotor 12 rotates at low speed, and the gear 6 and stirring member 7 also rotate at low speed. In this state, the contact portion 44 protrudingly formed on the side surface of the switch dial 42 is positioned above the protrusion 54, so the dial 42 does not move downward even if pressed downward.

When the switch dial 42 is further rotated counterclockwise, the rod 56 engages with the recess 47 that is closer to the shaft 43, so the pressing member 55 is slightly raised, and the tip of the sliding plate 63 is fixed in the groove 33. The stirring member 7 rotates at a medium speed in contact with the contact plate 40 of.

When the dial 42 is rotated to the maximum as shown in FIG. Since the stirring member 7 comes into contact with the contact plate 40, it rotates at high speed. At this time, the contact portion 44
Since the concave portion 53 comes into contact with the concave portion 53, further rotation is impossible.

As described above, according to the present invention, a cam surface is formed on the switch dial, a pressing member is made to slide in the vertical direction on the cam surface, and a sliding plate is fixed to the pressing member, so that this sliding The structure is simple because the plate is brought into contact with a plurality of contact plates in sequence, and since the rod slides on the cam surface, no force is required. In addition, the contact plate is easy to install because it is fixed by simply twisting it after being inserted into the locking hole formed in the bobbin in the same way as the arm fixing bracket. Since it can be connected directly to the contact plate, the trouble of wiring can be saved, and since the contact part of the contact plate is accommodated in the groove formed in the bobbin, the intervals between each part can be arranged accurately, and there is no need to provide a separate contact plate. The abutting part of the switch dial and the protruding part of the upper body prevent the stirring member from falling off during operation, which is a highly effective idea in practical terms.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is an exploded perspective view of the main parts of the hand mixer according to the invention, Fig. 2 is a side sectional view of the hand mixer in a stopped state, and Fig. 3 is a side sectional view of the main parts during high-speed operation. Figure 4 is a plan view with the upper body removed, Figure 5 is a sectional view showing the arm fixing fitting inserted into the locking hole of the bobbin, and Figure 6 shows the contact plate inserted. Cross section, 7th
The figure is a sectional view showing a fitted state of a gear and a stirring member. In the figure, 1 is an upper body, 2 is a lower body, 20 is a stator core, 22 is a bobbin, 26 is an arm fixing fitting, 29 is a carbon brush, 30 is a brush arm, 40 is a contact plate, 55 is an extrusion member, 63 is a sliding plate.

Claims (1)

[Scope of utility model registration request] a switch dial that can be rotated and pushed down within the main body and forms a cam surface on the lower side; an extrusion member that is biased upward by a spring and is moved in the vertical direction by coming into contact with the cam surface of the switch dial; and the extrusion member A plurality of approximately L-shaped contact plates that sequentially contact sliding plates fixed to the stator core are fixed to one of a pair of bobbins fixed to the stator core, and a brush arm to which a carbon brush is fixed is fixed to the other bobbin. A hand mixer characterized in that an arm fixing metal fitting having a hook portion for use is fixed.