JPS6264781A - Electric can opener - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to an electric can cutter.

(B) Conventional technology Conventionally, after a cutter is made to cut into the can lid by operating a lever, the can lid is automatically cut open without pressing the lever, and when the cutting is completed, the thrust acting on the cutter disappears. An automatic incision device that can terminate the incision by stopping the drive of the motor is well known, such as in Japanese Patent Publication No. 52-436.

This type of device generally has a complicated switch mechanism and requires a large switch operating lever, making it difficult to make the device smaller and lighter.

(c) Problems to be Solved by the Invention It is an object of the present invention to solve the above-mentioned drawbacks and to make it easier to maintain the ON state of the operation control push button.

(d) Means for Solving the Problems The present invention provides a drive wheel that rotates by transmitting the rotation of the motor to the front side of a main body case that houses the motor, and a drive wheel that is provided above the drive wheel to be vertically movable and cooperates with the drive wheel. The device is equipped with a cutting blade that operates to cut the can lid, and is movable up and down with respect to a button type formed on the top surface of the main body case, and turns on a contact point that controls the operation of the motor.

In the push button which is turned OFF, the push button has a locking step portion formed on one side thereof that engages with a narrow circumferential number when the push button is pushed in, and a groove or a protrusion formed on the side surface, and the main body case has A protrusion that can be inserted into the groove or a groove into which the protrusion can be completely inserted is formed on the top and bottom, one end of which is locked to a first spring receiver of the push button, and the other end is held by a second spring receiver of the main body case to hold the push button. A coil spring is provided that is always biased upward, and the second spring receiver is formed such that its center is deviated toward the locking step portion from the center of the first spring receiver when the push button is located at the upper position. That is.

(e) Operation By the means described above, the push button is pushed against the biasing force of the fill spring, and the locking step portion is engaged with the periphery of the button hole to maintain the operating state of the motor. A force in the mating direction acts on the push button, facilitating engagement. Also, by releasing the push button J: Recording stand, the operation of the motor is stopped again.

(F) Embodiment An embodiment of the present invention will be described below with reference to the drawings. The couplet machine shown in the figure is a handy type rechargeable couplet machine, and the main body case (TO) has a protruding and rotatable drive wheel (can feeding tooth) (1) on the n11 side and above the drive wheel on the same front surface. The can is opened while rotating by means of a cutting blade (3) which is movable up and down.
The drive wheel drive mechanism (A) is a mechanical component that drives the drive wheel (1) at low speed by a motor (5). (A1) and an electric component (A2) that electrically controls the motor.

[1] Main body case The main body case (K) is made of synthetic resin, and has screws <6
) (7) The front case (K1) and the rear case (K2) are removably connected by the pins (8) and (9), and are formed into a flat shape (left and right width 1,1>front and back width L2>), From a functional point of view, there is a roughly U-shaped handle that is connected to the mechanism part (10) so as to have a mechanism part (10) that mainly houses the mechanical component part A1) and a rectangular handle window (11). The front case (K1) consists of a mechanical part (1(1)l).
This is divided into a corresponding first part (K o ), seven other second parts (K12), and these two parts (Kn) (K
The tongue piece (13) and the first part (Kst) are engaged with the protrusion and the groove at the joint part of 12) and protrude so as to overlap from the second part (K12) to the first part (Kll). It is fixed with a polymerization screw (not shown).

[2] Torso drive mechanism - mechanical component (A1) Next, the drive wheel drive mechanism (A) will be explained. The mechanical component (A1) is a DC motor (5) and a reduction gear mechanism (14).
It is mainly composed of. The motor (5) has its drive shaft <1
5) protrudes toward the front end (right end in FIG. 1), and the electrical terminals (16) (16) are at right angles to the thickness direction of the mechanism section (10) (first end in FIG. 1). A partition wall (17) installed horizontally in a direction parallel to the plane of the drawing and erected in the first part (K11).
A drive shaft (15) is attached to (18) so as to pass through the partition wall (17), and is fixed to the partition wall (17) with a screw (not shown) passing through the partition wall (17).

The reduction gear mechanism (14) is used to reduce and transmit the rotation of the motor drive shaft (15) to the rotatable drive wheel (1) protruding from the front surface of the main body case (K). 15), a large-diameter synthetic resin gear (22) that meshes with the metal two-ohm gear (21), and a small-diameter gear (23) located in front of the gear. A first gear (G1) rotatably supported by a metal shaft (24) protruding from the shaft, and a large-diameter synthetic resin gear (25) that meshes with the small-diameter gear (23) of the first gear (G1). )
and a metal shaft (2) having a metal small-diameter gear (26) located behind it and protruding inward from the first part (Kzt).
7), a second gear (G2) rotatably supported by the second gear (G2), and a bearing that meshes with the J1 diameter gear <26>j of the second gear (G2) and is integrally provided on the first part (Kit). It consists of a third gear (G3) fixed to the rear end of a metal shaft (29) rotatably supported through the cylinder (28). The shaft (29)
A screw groove (31) is formed at the front end of the front end, that is, a portion protruding from the front case (K1), and the drive wheel (1) is removably screwed into this portion. The direction of the threaded groove (31) is formed so that the direction of rotation (X) of the shaft (29>) and the screwing direction of the drive wheel (1) are opposite.The shafts (24) and (27)
The rear end of (29) is the boss part (32) of the front case (K1)
It is supported by a metal support plate (34) that is fixed with screws (not shown) that are screwed into the base plate (33).

The gear ratio of the above reduction gear mechanism (14) is, for example, 268:
1, especially the worm gear (21) and the first gear (
G1), the gear ratio is 33:1, and a small gear reduces the speed.

[3] Drive wheel drive mechanism - electrical component (A2) The electrical component (A2) of the drive wheel drive mechanism (A) is a charging plug to be inserted into an AC commercial power outlet (not shown) as shown in Figure 15. (35L Miki's secondary rechargeable battery consisting of a step-down transformer (T) that can be connected to this, and an N1-CD battery that can be connected to the secondary side of this transformer via a rectifier diode (Dl)) Batteries (bx) (bl) (b3 ), the operation control switch (S
), −7 of transformer (T) = reverse current blocking diode (D3) connected in series on the secondary side
, a light emitting diode (LED) and a resistor (R) that light up during charging, and a diode (D2) that is connected to light the light emitting diode (LED) during operation.

Referring to FIG. 3, the charging plug (35) consists of a synthetic resin base (35b) with a support shaft (35a) protruding from both ends, and a Miki plug blade (35b) that has been insert-molded thereon. 35c) (35c), and the rear case (K2
) is mounted in the vicinity of the handle window (11) close to the motor (5) and gear mechanism (14) so as to be rotatable and retractable. Specifically, the motor (
5) The protruding part (36) partially protrudes according to the thickness of
) is formed with a plug storage recess (37), and this recess (37
) into the bearing groove (38) formed in the recess <37) from the inside of the rear case <K2>.
5a) (35a) is housed in a fitted state. Then, the plug (35) is recessed into the recess (37) and flush with the protrusion (36) (see Fig. 3), and the plug blades (35c) (35c) are pushed back from the recess (37). It is configured to be rotatable between the protruding state (see FIG. 4) that protrudes perpendicularly to the case (K2). On the other hand, the second part (K12) of the front case (K1)
has a fixed contact plate (39) (3) facing the plug (35).
9) attached to the terminal block (41) (41) is attached to the rear case (K
2), the charging plug (35) is stored in the recess (37), and the front case (K1) and rear case (K
2), the supporting shafts (35a) (35a) will fit into the bearing recesses (42) (42) provided in the terminal blocks (41) (41).
It is constructed so that it fits in. (43) is a terminal block (41)
(41) and the support plate (34), and the base (43) is installed in the recess between the terminal block (41)<41).
a) and by providing the support plate (34) with a rearward protrusion (34a), the terminal block (41) (41) wall and the protrusion (34a) are positioned laterally, and the base ( 43a) is placed on the stepped ribs (44) (44) and h provided on the terminal blocks (41) (41>), and
b) on the support plate (34) (see Fig. 1), and check the appearance and retraction of the charging plug (35) as it rotates on the base (35b).
) has a holding effect due to its own elastic deformation when it comes into contact with a protrusion (not shown). Charging plug (
When the plug blades (35c) (35c) of the plug blades (35) protrude, the rear ends of the plug blades (35c) (35c) that protrude from the base (35b) come into elastic contact with the contact plates (39) (39), and the plug blades (35c) 35c) (35c) and the contact plate (39) (39) are maintained in an electrically connected state, and the plug blade <35c) (35
c) This electrical connection is broken when immersed.

The transformer (T) is located in the lower storage space (
Rib (45) near the motor (5) of 12A)
It is positioned and arranged by .... Since this position is close to the charging plug (35), the high voltage wiring can be short.

Among the secondary batteries, Miki (bl) (b3) has a rib (46) on the rear side of the transformer (T) in the lower storage space (12A).
... and the upright wall (47) of the front case (K1), and the remaining one (bl) is placed on the handle part (12).
) at the rear end of the upper storage space (12B).
)... and the upright wall (47) of the front case (Ks).The former Miki (b 2) (
b3) are in direct contact, and the other one (bl) is electrically connected using a contact plate (49), so that the three are connected in series.

The operation control switch (S) is a fixed contact plate (54) attached to a printed circuit board (53) inserted between the ribs (51) and lips (52) of the front case (K1).
The movable contact plate (55) is mainly composed of a first push button (56) that presses the movable contact plate (55). 1st push button 56
) is the rising wall (47) of the front case (K1) with reference to Figure 6.
) and a semi-circular groove (57b) formed in the upright wall (58) of the rear case (K2). (56a) and the pressing portion (of the movable contact plate (55)
The first actuating part (56b) is integrally connected to the first actuating part (56b) so as to face the first actuating part (56b), and the upper surface of the leading corner part is connected to the lower end of the cylindrical part (56a) on the opposite side to the first actuating part (56b). The second actuating part (56c) has a slope (50) formed by cutting it diagonally.
). The cylindrical part (56a) has one end engaged with the peripheral edge (58) of the button type (57), and has an engagement step part (59) for keeping the movable contact plate (55) in contact with the fixed contact plate (54). ) is formed. In order to stabilize the state of engagement between the stepped portion (59) and the peripheral edge (58), the upper surface of the first actuating portion (56b) and the peripheral protrusion (60) of the button type (57) are brought into contact with each other (see Fig. 8). ) I can forgive it. This protrusion (60) is fitted into the groove (56d) of the push button (56) in FIG. 6.

Various measures have been taken to make the engagement of this stepped portion (59) easier. First, the front case (K1) and the rear case (K2) are attached to the front and rear sides of the cylindrical part (56a>lower end, respectively).
A guide groove (62H62) into which a pair of guide protrusions (61) (61) (rear case side not shown) formed in
) (the front side is not shown).

These guide ribs (61) (61) extend in the vertical direction, but the upper part (61a) and the lower part (61b) are shifted in the left-right direction, that is, the lower part (61b) is at the top with respect to the upper part (61a). (the right end in Figure 1), and the middle part (61c
) is formed so that it slopes downward toward the front side.

The horizontal width of the above grooves (62) (62) is the protrusion (61) (6
The specified width is set larger than the left and right width (thickness) of 1), and the push button (
56) -L downward movement can be performed smoothly.

In this embodiment, due to the presence of the inclined intermediate portion (61), when the push button (56) is pressed, the push button (56) is displaced toward the front side.

Next, the first cylindrical splash receiver (56d) formed inside the cylindrical part (56a) (see Figure 1 (a))) and the front case (
A coil spring (64) is interposed between the dish-shaped second spring receiver (63) integrally formed with the cylindrical spring receiver (56).
By allowing the center (D2) of the dish-shaped spring receiver (63) to deviate toward the beginning with respect to the center (Dl) of d), a state in which the lower part is deviated with respect to the upper part of the coil spring (64) (115th
! J (see (a) and (b)), and the push button (56) receives a force that moves it toward the front end due to the round return force of the coil spring (64).

Further, the suppressing part (55a) of the movable contact plate (55) is injected downward to form a mountain shape, and this pressing part (55a) is pressed by the pressing protrusion (65) of the first operating part (56b). With this configuration, when the push button (56) is pressed, the elastic force of the movable contact plate (55) causes the pressing portion (55a) to urge the movable contact plate (55) toward the front end.

Furthermore, the rear side of the upper surface of the cylindrical part (56a) is the lower part (65).
) and an inclined surface (
67). With this configuration, you can press the button (
56) Pressing the top surface tends to generate force toward the top.

The diode (Di) (D2) (D3) and the resistor (R
) can be attached to the bottom side of the printed circuit board (53), and the light emitting diode (LED) is installed upright in the part located on the front side of the third gear (G3), which is an extension of the top side of the printed circuit board (53>). , a window (68) formed on the top surface of the first part (Klt)
), the tip is exposed on the top surface.

[4] Cutting blade operating mechanism (B) Next, the configuration of the cutting blade operating mechanism (B) will be explained. This mechanism (B) is attached to the upper part of the first part (K11) of the main body case (K). Referring to Figure 5, (71) is the first
A rotating shaft (73) that is rotatably supported in a shaft hole (72) formed in the part (Kn) is protruded, and is a metal interlocking plate that is rotatably provided in the main body case (K). Rotating shaft (73)
A cutting blade (3) is removably fixed to the tip of the cutting blade (3).
3) is rotatable around the fulcrum (74), that is, the central axis of the rotating shaft (73). The tip fixing part (73a) of the rotating shaft (73) is formed into a rectangular shape (as long as it is non-circular) with a smaller diameter than other parts, and a synthetic resin lever (75) is attached to the fixing part (73a) at the corner. After the hole (76) is fully press-fitted, the cutting blade (3) is formed on the upper part of the fixing part (73).
a>, and is fixed to the fixing part (73a) with a screw (79) that screws into a screw hole (78) formed in the fixing part (73a).

The lever (75) is press-fitted to hold the interlocking plate (71) so that it will not easily be removed from the main case (K), and the distance of the cutting blade 3) from the front of the main case (K) is determined. A hand grip piece (75a) is integrally formed at the front of the upper edge of the lever (75), and the lever (75
) is configured to also function as a blade-lifting lever that allows the blade to be rotated upward. Also, the rear end of the handhold piece (75a) comes into contact with the upper surface of the arm support stand (90), which will be described later, and the cutting blade (3)
The rotation in the downward direction is restricted.

The cutting blade (3) has a substantially rectangular shape as shown in FIG. 14, and has a fulcrum (74) between the lower end of the leading side edge (3A) and the lower end of the trailing side edge (3B) on the rear side (right side in the figure). ) is formed with an arc-shaped cutting edge (3C) at the center, and the lower end corner on the leading side (corner on the biting side) is cut out to form an acute biting edge (3D).The interlocking plate (71) is a coil spring (biasing means) (+1
12), the blade is energized in the direction of arrow P in FIG. 5, that is, in the blade lowering direction.

(83) is the main body case (K) with reference to Figures 6 and 13.
) A second push button made of synthetic resin for blade-beards is provided on the top surface of the blade and on the front side of the first push button (56), and is slid up and down through the button hole (84) formed on the top surface of the main body case (K). Moving cylindrical part (8
3a>, a first actuating part for blade-beard (83b) and a second actuating part for stopping operation (83c) integrally formed on the lower end thereof, and a spring holder (85> formed on the main body case (K)). It is always biased upward by a coil spring 86〉 interposed between the spring receiver (83d) (see Fig. 1) formed inside itself.The second operating portion (830) is in the operating state. A slope (87) is formed above the slope (50) of the second actuating part (56c) of the first push button (56) (see Fig. 8), which is engaged with the second push button (83). ) to select the first
The push button (56) is moved toward the rear, and the engagement of the push button (56) is released. Note that it is sufficient to provide either one of the slopes (,50) and (87). (89) (89) is the previous case (
K1) and a pair of guide lips formed on the rear case (K2) (the rear case side is not shown), and a pair of grooves (91) (91) formed on the front and rear of the cylindrical part (83a) (the front side is (not shown) to guide the cylindrical portion (83a) up and down.

(92) is a synthetic resin actuating lever rotatably supported on a shaft (93) protruding inside the main body case (K), and when the second push button (83) is pressed in the middle part, the actuating part (83b ), the first engaging portion (92a) protrudingly provided so as to abut and engage with the
Also, a second engaging portion (92b) is exposed at the tip end, which abuts and engages with a pin (71a) protruding from the interlocking plate (71) when the operating lever (92) is rotated. This actuation lever (
92> is an operating arm (92c) that can be elastically deformed at the upper middle part.
is integrally formed, and at its tip there is an engagement groove (71b>) formed in the interlocking plate (71) when the second push button (83) is pressed.
A release arm (92d) is formed on the opposite side of the shaft (93) from the actuating arm (92c) to engage the second push button (<56) of the first push button. Actuation part (56
c), and when the first push button (56) descends, the second actuating part (56c) pushes the release arm (92d) and engages the engagement groove (71b) and the engagement part (94). ).

(95) is a U-shaped leaf spring attached to the main body case (K), and when the cutting blade (3) is in the lowered state, the interlocking plate (71)
) is in contact with the protrusion (71c) and slightly pushes the blade support plate (71) in the direction of raising the blade.
-17- cut the cutting blade (3
) is stuck in the can, a force is applied to the support plate (71) in the lifting direction, making it easier to pull up the cutting blade (3).

(96) is a can support stand installed on the front of the main body case (K), which allows the can (N) to be separated from the case (K) by an appropriate distance.

(97) is a can holding shaft, and (98) is a magnet for attracting a can lid attached to an arm (99) that can freely rotate in the horizontal direction.

In the above parts arrangement, the charging plug (35) is attached to the heavy motor (5) and the reduction gear mechanism (14).
, and on the opposite side of the motor (5) and reduction gear mechanism (14) with the charging plug (35) in the center, there is a transformer (T) and a secondary battery (b) which are the next heaviest.
1) to (b3) are arranged to balance the left and right weight, the center of gravity (0) of the device is located at the position shown in the third section, and is close to the charging plug (35). As a result, when the charging plug (35) is inserted into a power outlet for charging, excessive rotational moment is not applied to the charging plug, and damage to the charging plug (35) can be prevented.

The operation in the above configuration will be explained. In the initial state, the cutting blade (3) is in a raised state (see Figure 6 and the dashed-dotted line in Figure 1).
To perform the line cutting operation, hold the can (N) in your left hand, place its edge (wrapped part) on the drive wheel (1), and abut the side surface against the support stand (96). Then the first
When the push button (56>) is pressed, the operating lever (92) is rotated, the engagement between the interlocking plate (71) and the operating lever (92) is released, the cutting blade (3) is lowered, and the edge (3D) is Lid (N
1) comes into contact (see Fig. 7). Furthermore, when the first push button (56) is pressed, the contacts (54) and (55) come into contact and the operation control switch (S) is turned ON. In this state, the step part (59)
) (see Fig. 8). When the operation control switch (S) is turned on, the drive wheel (1) starts rotating and the can (N
) rotates, and the cutting blade (3) is automatically and easily inserted into the lid (N1) from the edge (3D), and the lid (N1) is cut.

When you finish cutting the lid (N1), press the second push button (83) halfway and the second actuating part (83c) moves to the second position of the first push button (56).
When the actuating part (56c) comes into contact with the first push button (56), its engagement is released and the first push button (56) returns to the upper position, and the operation control switch (S) is released.
is turned off and the motor (5) stops (see Figure 6).

Next, hold the can (N) with your left hand and press the second push button (83) all the way to rotate the actuating lever (92).
92), the interlocking plate (71) rotates and the cutting blade (3>
is pulled up, and the engaging portion (94) and the engaging groove portion <71b)
This pulled-up state is maintained by engagement with and returns to the initial state. In this state, the can (N) can be removed.

When the secondary battery is discharged during the above-mentioned line cutting operation, the cutting blade will be stuck in as shown in Fig. 14, but the cutting blade (3
) is shaped like an arc around the fulcrum (74), so when the push button (83) is pressed, the blade edge does not get caught in the incision R (100) of the lid (N1) and can be easily cut. The blade (3) can be pulled up. If, push button (83)
If it is difficult to pull it up by hand, it is also possible to pull it up by placing your hand on the lever (75). It should be noted that "the present invention is not limited to the above embodiments.

is formed with grooves (62) ('62) on the first push button (56) side and protrusions (61) (61) on the main body case (K) side, but there are no protrusions on the first push button (56) side. A groove (not shown) for guiding this protrusion may be formed on the main body case (K) side.

(g) Effects According to the present invention configured as described above, since it is not an automatic cutting device, the switch mechanism for controlling the motor is simple, and a large switch actuating lever is not required. The size and weight can be reduced. In addition, the push button can be easily engaged with the main body case using the restoring force of the coil spring.
It has great effects such as being able to easily maintain the ON state of the push button.

[Brief explanation of drawings]

1 to 15 each show an embodiment of the present invention,
Figure 1 (A) is a partial cross-sectional rear view with the rear case removed, Figure (B) is an enlarged view of the main parts, Figure 2 is an overall front view, and Figure 3 is an overall rear view ( b) is an enlarged view of the main part, 4th
The figure is an overall top view, Figure 5 is a sectional view taken along the line V to V in Figure 1, Figures 6 to 8 are explanatory diagrams showing mutually different operating states, and Figures 9 and 10 are mutually different operating states. FIG. 11 is an exploded perspective view of the main parts, FIGS. 12 and 13 are perspective views of parts, respectively, and FIG. 14 is an explanatory view of the line cutting operation.
FIG. 15 is an electrical circuit diagram. (1)... Drive wheel, (3)... Cutting blade, (5)...
・Motor, (K)・Body case, (54)(55)・
...Contact, (56), push button, (56d)...first spring receiver, (57)...button type, (58)...periphery, (5
9)...Locking step portion, (61)...Protrusion, (62)
...Groove, (63)...Second spring receiver, (64)...
・Coil spring.

Claims (1)

[Claims] (1) A drive wheel that rotates when the rotation of the motor is transmitted to the front side of the main body case that houses the motor, and a cutting blade that is provided above the drive wheel so as to be movable up and down and cooperates with the drive wheel to cut open the can lid. and has a push button that is movable up and down with respect to a button hole formed on the top surface of the main body case and that turns ON and OFF a contact that controls the operation of the motor, the push button has a button on one side when the push button is pressed. A locking stepped portion that engages with the periphery of the hole is formed, and a groove or a protrusion is formed on the side surface, and the main case has a protrusion inserted into the groove or a groove into which the protrusion is inserted up and down. A coil spring is provided, one end of which is locked to a first spring receiver of the push button, the other end of which is held by a second spring receiver of the main body case, and which constantly biases the push button upward; An electric can opener characterized in that the push button is formed to be offset toward the locking stepped portion from the center of the first spring receiver when the push button is located at the upper position.