JP2004275787A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing machine in which a rotation position of the drum is fixed by simple structure. <P>SOLUTION: This drum type washing machine is equipped with an engaging groove 25 on the outer periphery part of a rotor 20b of an outer rotor type motor directly connected to the main shaft 14 of the drum 13 and a drum lock device 21 just under the shaft. The drum lock device 21 has structure in which a lock pin 212 is vertically moved together with rotation of a torque motor 211. A position of the drum 13 is fixed by advancing the lock pin 212 to fit into a groove hole of the engaging groove 25. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drum type washing machine having a drum that rotates about a horizontal axis or an inclined axis. In general, a drum-type washing machine can often perform washing to drying continuously, but the drum-type washing machine mentioned here may not be capable of drying.

  The drum-type washing machine has a configuration in which a cylindrical basket-shaped drum is rotatably arranged inside an outer tub around a horizontal axis or an inclined axis, and an outside in which laundry is stored and water is stored in the drum. The laundry is slap-washed by rotating in a tub. In such a general drum type washing machine, a door body for putting clothes in is provided on the front side of a substantially rectangular parallelepiped outer box, and when the door body is opened, through an opening provided in an outer tub, The laundry input port provided on one end surface of the drum is configured to be viewed.

  One of the great complaints of the general consumers about such a drum type washing machine is that it is difficult to put clothes in and out. That is, in the drum type washing machine having the above configuration, even when the laundry loading port is at a low position and the washing machine is placed on a dedicated table, the difficulty of loading the laundry is completely reduced. Not resolved. Conventionally, in order to cope with such dissatisfaction, there is a drum type washing machine on the market in which a laundry loading port of a drum is slightly inclined upward using an inclined shaft. Also, attempts have been made to make the laundry inlet as large as possible. However, even with such a configuration, the usability is not necessarily sufficiently good for those who are accustomed to the operability of the spiral washing machine.

One possible solution to the above-mentioned inconvenience in the drum type washing machine is to place the laundry inlet on the top of the outer box instead of the front of the outer box, as in the case of the conventional spiral type washing machine. It is to provide. When the laundry inlet is provided on the upper surface of the outer box, it is necessary to provide an opening of the outer tub and an opening of the drum at a position coincident with the inlet, so that not the end surfaces of the outer tub and the drum but the respective peripheral surfaces. An opening will be provided. However, while the position of the outer tub is fixed, the drum is rotatable in the outer tub, so that the drum is stopped at a position where the opening provided in the drum coincides with the outer tub opening. There is a need.
JP-A-4-189394

  In such a drum type washing machine, a mechanism that can securely and quickly fix the rotational position of the drum with a simple configuration is desired.

  SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a main object is to rotate the drum so that the drum opening coincides with the outer tank opening when the drum is stopped with a simple configuration. It is to provide a drum type washing machine that can fix the drum type washing machine.

Means for Solving the Problems According to the present invention made to solve the above-described problem, a drum having a substantially cylindrical peripheral surface is rotatably disposed about a horizontal axis or an inclined axis inside an outer tank disposed in an outer box. In drum type washing machines,
a) a shaft having one end fixed to the drum as the horizontal axis or the inclined axis,
b) a bearing in the outer tub that supports the shaft,
c) a rotor attached to the other end of the shaft, and a drum rotation driving motor including a stator attached to the outer tub side,
d) drum locking means for stopping rotation of the motor rotor to fix the drum in a predetermined rotation position,
It is characterized by having.

  In the drum-type washing machine according to the present invention, for example, when the drum is stopped at a position where the laundry input port or the outer tub opening coincides with the drum opening as described above, the drum rotates integrally with the drum. The position of the drum is fixed by stopping the rotation of a rotor provided outside the outer tub in the member. For this reason, there is no danger that the drum lock means is immersed in or wet by water, so that it is not necessary to seal with water. Further, since the diameter of the rotor is larger than that of the shaft body, the positional accuracy can be easily improved as compared with the case where the rotation of the shaft body itself is stopped.

  As one embodiment of the drum type washing machine, the motor is an outer rotor type motor, and a rotor of the motor has a concave portion for engagement, and the drum lock means is an operating body that advances or retreats toward the rotor. And a structure in which a part of the operating body is engaged with the concave portion to lock the drum. Further, it is preferable that the concave portion has a guide piece extending outward on both sides of the entrance of the concave portion, and it is more preferable that the concave portion is provided on the outer peripheral edge of the rotor.

  According to this configuration, when the operating body of the drum locking means advances toward the rotor, if there is a recess in the front of the operating body, the tip of the operating body engages with the recess to stop the rotor. In addition, when the rotation of the rotor is slightly deviated and the tip of the operating body comes into contact with the guide piece, the tip of the operating body is guided to the dent by slightly rotating the rotor while maintaining the contact state. can do. Thereby, the force applied at the time of engagement can be reduced, and the operating body itself and a part of the rotor can be prevented from being damaged by the operating body contacting an undesired portion.

  Hereinafter, a drum-type washing machine according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an external perspective view of a drum-type washing machine according to the present embodiment, and FIG. 2 is a vertical sectional side view of an upper portion. In this drum type washing machine, the outer box has an inclined shape (hereinafter, referred to as “inclined portion 1c”) in which the corner between the upper surface portion 1a and the front surface portion 1b is slightly rounded and falls forward. A large laundry inlet 3 is opened from the inclined portion 1c to the rear upper surface 1a, and an upper lid 2 for opening and closing the laundry inlet 3 extends horizontally in the horizontal direction as shown in FIG. The shafts 2a and 2b can be erected in a folded state behind the laundry inlet 3.

  On the left side of the upper lid 2, a detergent container 4 that can be pulled out forward is provided, and on the right side, an operation panel 5 is provided extending in the front-rear direction. The operation panel 5 has various operation keys for setting a driving course, a reservation time, and the like, and lights up according to these settings, notifies the progress of the washing process, or reserves the remaining time for the reservation or operation. Various indicators for displaying such information are distributed and arranged as appropriate. Since almost the entire operation panel 5 is directed obliquely upward, when the user looks down diagonally downward while standing in front of the washing and drying machine, the surface of the operation panel 5 is perpendicular to the line of sight. Consideration is given that the display is in a close state, the display is easy to see, and the operation keys are easy to press.

  Next, an internal configuration of the drum type washing machine will be schematically described with reference to FIGS. 3 is a front vertical sectional view of a main part inside the drum type washing machine, FIG. 4 is a left side view of the same inside, and FIG. 5 is a right side vertical sectional view of the inside.

  On the pedestal portion 6 inside the outer case 1, an outer tub 10 whose peripheral surface is substantially cylindrical and whose both end surfaces are substantially closed is placed in a state where the end surfaces face the left and right side surfaces of the outer case 1, respectively. The two springs 11 are suspended and supported from above on both left and right sides, and a damper 12 which supports the lower portion of the outer tub 10 in the front-rear direction is held so as to be able to swing appropriately. Inside the outer tub 10, as an inner tub for accommodating laundry, a horizontal drum 13 in which both ends of a substantially cylindrical peripheral surface having a large number of water holes are substantially closed. Are provided rotatably about a horizontal axis C extending in the left-right direction.

  The main shaft 14 fixed to the center of the left end surface of the drum 13 is supported by a bearing 17 held by a first bearing case 16 made of aluminum die casting and fixed to the left end surface of the outer tub 10. On the other hand, the auxiliary shaft 15 fixed to the center of the right end face of the drum 13 is supported by a second bearing 19 held in a second bearing case 18 fixed to the right end face of the outer tub 10. The horizontal axis C is formed by the main shaft 14 and the auxiliary shaft 15. A rotor 20b of an outer rotor type motor 20 is fixed to a tip of a main shaft 14 protruding laterally from a left end surface of the outer tub 10, and a stator 20a of the motor 20 is mounted on a first bearing case 16 which also serves as a motor base. Has been fixed. When a driving current is supplied from a control circuit (not shown) to the stator 20a, the rotor 20b rotates by this, and the drum 13 is driven to rotate via the main shaft 14 at the same rotation speed as the rotor 20b.

  An outer tub opening 100 for taking in and out the laundry is provided at a position corresponding to the laundry insertion opening 3 of the outer box from an upper part of the outer peripheral surface of the outer peripheral surface to an obliquely forward direction. Opening / closing is enabled by 101. A drum opening 130 for taking in and out the laundry is also provided on the peripheral surface of the drum 13, and the drum opening 130 can be opened and closed by a drum door 131 including two door bodies 131a and 131b having a double door structure. Has become. However, since the drum 13 is rotatable, the movable engagement means is provided below the stator 20a so that the drum 13 maintains a stopped state at a position where the drum opening 130 radially coincides with the outer tank opening 100. Drum lock device 21 is provided.

  It is dangerous that the user opens the outer tub door 101 while the drum 13 is rotating. Although not shown, a door lock mechanism for prohibiting the opening of the outer tub door 101 is provided by the drum exposure prohibiting means. The lock is automatically applied during operation. For the same purpose, a lock mechanism for prohibiting opening of the upper lid 2 may be provided.

  A drain port 22 is provided at the bottom of the outer tub 10, and the drain port 22 is connected to an external drain through a drain hose (not shown) via a drain valve 23. A concave portion is formed at the bottom of the outer tub 10, and a water heater 24 for heating the stored water is provided therein.

  Although not described in detail here, hot air is supplied into the drum 13 during drying on the right outside of the outer tub 10 to condense, liquefy, and remove the water vapor taken from the laundry to reheat the air. Such a circulating air flow path is formed.

  FIG. 6 is an electrical configuration diagram of a main part of the drum type washing machine of the present embodiment. The control unit 50 mainly includes a microcomputer including a CPU, a ROM, a RAM, a timer, and the like. Based on a control program stored in the ROM, the control unit 50 controls the operation of each process of washing, rinsing, dehydrating, and drying. Various controls for the execution are executed. The control unit 50 receives a key input signal from various operation keys 52 provided on the operation panel 5 for the user to give various settings and instructions, and detects a water level of water stored in the outer tub 10. A water level sensor 54, a water temperature at the time of easy rinsing, a drum outlet temperature sensor 55 for detecting the temperature at the drum outlet side during the drying process, a cooling water temperature sensor 56 for detecting the temperature of the cooling water during the drying process, and the drum motor 20. A detection signal is input from a rotation sensor 20c provided with a Hall element or the like for detecting a rotation position of the motor 20.

  Further, a load driving unit 51 is connected to the control unit 50, and the drum motor 20, the fan motor 57, the water heater 24, the drying heater 58, the water supply valve 59, and the drain valve 23 are connected through the load driving unit 51. And other operations are controlled. Further, in order to perform a drum lock that inhibits the rotation of the drum 13 as described later, the control unit 50 transmits a detection signal from a rotation position detector 217 incorporated in a torque motor 211 provided in the drum lock device 21. While receiving, the operation of the torque motor 211 is controlled.

  Next, characteristic components of the drum type washing machine of the present embodiment will be described in detail. First, the configuration of the drum lock device 21 in the present drum-type washing machine will be described with reference to FIG. 7 in addition to FIGS. FIGS. 7A and 7B are enlarged views of the drum lock device 21. FIG. 7A shows a state where the drum lock is released, and FIG.

  The drum lock device 21 includes a torque motor 211 as a driving source, an operating body 213 having a lock pin 212 at an end, a spring 214 for urging the operating body 213, a cam 215 fixed to a rotating shaft of the torque motor 211, and the like. And is fixed to both the first bearing case 16 and the outer tub 10 over the both. Although the outer tub 10 is made of plastic, the first bearing case 16 is made of aluminum die-cast, so that the drum lock device 21 can be firmly held. The operating body 213 can move only in the vertical direction along a guide groove provided in the case, and is urged upward by a spring 214. The protrusion 216 provided on the cam 215 is movable within an opening 213 a provided on the operating body 213.

  On the other hand, the engagement groove 25 as the fixed engagement means, which is the side for receiving the lock pin 212, is provided on the outer peripheral edge of the rotor 20 b of the drum motor 20. Guide pieces 25a are provided on the left and right (in the rotational direction of the rotor 20b, front and rear).

  Thus, when the protrusion 216 is at the lowest position as shown in FIG. 7A, the protrusion 216 presses the operating body 213 downward against the urging force of the spring 214. The lock pin 212 is pulled downward (that is, retracted). When the torque motor 211 is rotated in the counterclockwise direction from this state, the protrusion 216 rises with the rotation, and accordingly, the operating body 213 gradually moves upward by the urging force of the spring 214. Thereby, the lock pin 212 starts to advance upward.

  As shown in FIG. 7B, just when the cam 215 makes a half turn and the protrusion 216 reaches the highest position, the operating body 213 also reaches the highest position, and the lock pin 212 is advanced most. At this time, if the engagement groove 25 exists in front of the advance, the lock pin 212 fits into the groove of the engagement groove 25, thereby stopping the rotation of the rotor 20b. That is, the drum 13 is locked. Since the tip of the lock pin 212 has a trapezoidal shape with both corners cut off, even if the position of the lock pin 212 and the slot of the engagement groove 25 are slightly displaced, the entrance of the slot of the engagement groove 25 is not required. When the cut-off portions of the lock pins 212 come into contact with both corner portions, they are fitted so as to slide along the inclination of the cut-off portions.

  Further, when the torque motor 211 is rotated in the counterclockwise direction, the convex portion 216 descends with the rotation, and accordingly, the operating body 213 gradually moves downward. Then, the lock pin 212 is disengaged from the groove of the engagement groove 25, and the rotor 20b becomes rotatable. That is, the drum lock is released.

  As described above, according to the rotation operation of the torque motor 211 that rotates only in one direction, the drum lock and the lock release are achieved. As described above, the torque motor 211 has a built-in rotation position detector 217 for detecting the rotation position of the shaft, and the detection signal indicates that the lock pin 212 is in the advanced state or the retracted state. It is possible to determine whether there is. Although a solenoid may be considered as a mechanism for reciprocating the operating body 213, a sound during operation can be suppressed by using a torque motor, and the lock pin advances due to a positional shift between the lock pin and the engagement groove. There is an advantage that, even when the operation is stopped in the middle, an abnormal current does not flow and the device is not damaged.

  Next, the control operation for performing the drum lock will be specifically described with reference to the flowchart of FIG. The control unit 50 resets the number of drum position correction operations C to 0 (step S10). Then, after the rotation of the drum motor 20 is stopped at a predetermined position by driving the drum motor 20, the torque motor 211 is driven to advance the lock pin 212 as described above (step S11). Immediately thereafter, it is determined whether or not the drum lock has been completed (step S12). Here, when it is detected from the rotation position detector 217 that the cam 215 has rotated to the predetermined position, the drum lock is considered to be completed. Therefore, the rotation position detector 217 and a part of the control unit 50 work together as the detection unit. When the lock pin 212 is fitted in the slot of the engagement groove 25, it is determined that the drum lock is completed. Therefore, the process proceeds to step S26 to continue the operation other than the drum lock.

  There may be a slight shift in the rotational position adjustment by the first driving of the drum motor 20. As a result, when the position of the lock pin 212 and the slot of the engagement groove 25 are shifted, the lock pin 212 comes into contact with the guide piece 25 a projecting to the side of the engagement groove 25. Then, the torque motor 211 does not rotate any more, and it cannot be determined in step S12 that the drum lock has been completed. Therefore, the number of drum position correction operations C is incremented (step S13), and it is determined whether or not the value is 3 or less (step S14). If it is not more than 3, control is performed so that the drum 13 is gradually rotated in the normal rotation direction (step S15). At this time, the rotor 20b rotates while the lock pin 212 is in contact with the guide piece 25a of the engagement groove 25. Then, while determining whether or not the drum lock has been completed, the drum 13 is rotated until the rotation angle reaches 5 ° (steps S16 and S17). If the lock pin 212 fits into the slot during this time, it is determined that the drum lock has been completed. Therefore, the process proceeds to step S25, where the rotation of the drum motor 20 is stopped, and then the operation is continued.

  When the rotation angle reaches 5 ° without detecting the completion of the drum lock, the drum motor 20 is temporarily stopped (step S18), and control is performed so that the drum motor 20 is gradually rotated in the reverse rotation direction (step S19). Then, while determining whether or not the drum lock has been completed, the drum 13 is rotated until the rotation angle reaches 10 ° (that is, 5 ° in the reverse direction as viewed from the state before the start of normal rotation) (steps S20 and S21). ). If the lock pin 212 is fitted into the groove of the engagement groove 25 during this time, it is determined that the drum lock is completed. Therefore, the process proceeds to step S25, where the rotation of the drum motor 20 is stopped and the operation is continued.

  If the rotation angle reaches 5 ° without detecting the completion of the drum lock, the drum motor 20 is temporarily stopped (step S22), and the process returns to step S13. Therefore, the drum lock is attempted by repeating the processes of S13 to S22 up to three times. When the number C of times of the drum position correcting operation exceeds 3, the process proceeds from step S14 to S23, informing the user that the drum lock is abnormal by a buzzer sound or display, and unlocks the outer tank door 101 ( Step S24). As a result, the outer tub door 101 can be freely opened, and the user can take out the laundry by opening the upper lid 2, the outer tub door 101, and the drum door 131 as needed.

  As described above, in the drum type washing machine of the present embodiment, the drum 13 is slightly rotated in the forward and reverse directions at the position where the lock pin 212 and the slot of the engagement groove 25 are close to each other to set the position where the two fit. Drum lock can be performed in a short time because it is found.

  As described above, the positioning by driving the drum motor 20 is not strict. However, if the drum 13 is rotated by ± 5 ° as described above, in most cases, the position where the drum is locked can be found. However, if the initial positioning accuracy is still worse, the lock pin 212 may come off the guide piece 25a when rotating the drum by ± 5 °. When the lock pin 212 is removed from the outside of the guide piece 25a, the lock pin 212 advances as much as possible. Therefore, the detection signal from the rotation position detector 217 is in the same state as when the drum lock is completed, and it is erroneously determined that the drum lock is completed. Therefore, when the initial positioning accuracy is poor, it is preferable to execute a drum lock process by another control as described below.

  Next, control by another method of the drum lock will be described with reference to the flowchart of FIG. The control unit 50 resets the number of drum position correction operations C to 0 (step S30). Then, after the drum motor 20 is driven to stop the rotation at a predetermined position, the torque motor 211 is driven to advance the lock pin 212 as described above (step S31). Thereafter, it is determined whether or not the drum lock has been completed (step S32). If it is determined that the drum lock has been completed, the operation other than the drum lock is continued (step S42).

  If it is determined in step S32 that the drum lock has not been completed, the number of drum position correction operations C is incremented (step S33), and it is determined whether the value is 3 or less (step S34). If it is equal to or less than 3, the drum motor 20 is controlled so that the drum 13 is gradually rotated in the normal rotation direction (step S35). At this time, the rotor 20b rotates while the lock pin 212 is in contact with the guide piece 25a of the engagement groove 25. The drum 13 is rotated until it is determined that the drum lock is completed (step S36). If it is determined that the drum lock is completed, the drum motor 20 is temporarily stopped, and then the torque motor 211 is further rotated half a turn to release the drum lock. That is, an operation of pulling in the lock pin 212 is performed (step S38). Then, when it is determined that the drum lock has been released by the detection signal from the rotation position detector 217, that is, the lock pin 212 has retreated, the process returns to step S31 to retry the drum lock operation.

  If the unlocking is not detected in step S39, the user is notified of the drum unlocking abnormality by a buzzer sound or display (step S40), and then the outer tank door 101 is unlocked (step S41). According to this control method, when the lock of the drum fails, the lock pin 212 is once pulled in. Therefore, even if the drum 13 is rotated with the lock pin 212 advanced, the lock pin 212 collides with the engagement groove 25. There is no danger of damage or the like.

  Further, as still another method of controlling the drum locking operation, a flowchart shown in FIG. 10 may be used. In this control, a pulse signal generated each time the drum motor 20 rotates by a predetermined angle, that is, a detection signal from the rotation sensor 20c in FIG. 6 is used. Here, it is assumed that the number of pulse signals generated during a period in which the drum 13 makes one rotation is 72.

  When performing the drum lock, first, the drum motor 20 is driven to rotate in the normal rotation direction at a predetermined speed (step S50), and when it is detected that the drum 13 has passed a predetermined rotation position (step S51), the rotation sensor 20c is used. Is reset (step S52). Then, counting is started from the state where the count value P is 0 (step S53). If it is detected that the count value P has reached 65 (“Y” in step S54), that is, about When the 325 ° drum 13 rotates, the driving of the torque motor 211 is started, and the lock pin 212 starts to advance (step S55). There is a slight time delay in actually advancing the lock pin 212 to the extent that it fits into the slot of the engagement groove 25 or abuts the guide piece 25a thereof. Immediately before the slot comes, the lock pin 212 contacts the guide piece 25a, and then the lock pin 212 contacts the guide piece 25a and the rotor 20b rotates slightly to fit into the slot. Then, since it is determined that the drum lock has been completed ("Y" in step S56), the drum motor 20 is stopped (step S57).

  The rotation speed of the drum motor 20 may be increased to some extent until an instruction to advance the lock pin 212 is given, but after that, the rotation speed is reduced so that the lock pin 212 contacts the engagement groove 25. It is advisable to reduce the impact. According to this control, the probability of failure of the drum lock operation becomes extremely small, so that it is possible that the drum lock can be performed in the shortest time on average.

  By the way, in order to minimize the mechanical load on the lock pin 212 and the rotor 20b when performing the drum lock as described above, the rotor 20b is temporarily stopped after being rotated by a minute angle, It is desirable to perform intermittent rotation drive, such as detecting whether or not the rotor 20b is locked, and if necessary (for example, if not locked), continuing to rotate the rotor 20b by a small angle. If an induction motor is used, such fine speed control is difficult, so a DC brushless motor is used as the drum motor 20 and this is driven by an inverter. However, even if a DC brushless motor is used, when the drum 13 is driven to rotate at a low speed, the generated torque becomes low. In a state where the laundry is contained in the drum 13, after the drum 13 is slightly rotated, When the laundry is temporarily stopped, the laundry is likely to move and the drum 13 is easily rotated by the force, and it is difficult to maintain a stable suspended state.

  Therefore, in the drum type washing machine of the present embodiment, by adopting the rotation control method described below, sufficient torque is generated even at low-speed intermittent rotation to obtain stability. This rotation control method will be described. Generally, the rotation control of a DC brushless motor uses the attraction force and repulsion force of a magnet to smoothly rotate the rotor. However, in this drum type washing machine, the repulsion force of the magnet is substantially reduced. By using only the suction force without using it, the position retention at the time of temporary stop when the rotor is intermittently rotated is improved.

  FIG. 11 is an operation principle diagram of the drum control used in the drum lock operation in the washing machine. In this figure, for simplicity, a rotor is disposed at the center and a stator having three phases of U, V, and W is disposed on the outer peripheral side. However, in the actual drum motor 20, the magnet of the rotor 20b has 24 poles and the stator 20a Is 36 slots.

  First, as shown in FIG. 11A, when currents are respectively supplied to the U-phase and the V-phase, and the U-phase is the N-pole and the V-phase is the S-pole, the rotor is held at the illustrated position. Next, as shown in FIG. 11B, when currents are respectively supplied to the W phase and the V phase, and the W phase is the N pole and the V phase is the S pole, the rotor rotates counterclockwise by about 60 ° and is illustrated. Held in position. Subsequently, as shown in FIG. 11 (C), when currents are supplied to the W phase and the U phase, respectively, and the W phase is the N pole and the U phase is the S pole, the rotor further rotates counterclockwise by about 60 °. It is held at the position shown. In this way, by sequentially changing the current flowing phase one by one, the rotor can be intermittently rotated by 60 °. Then, in each state as shown in FIG. 11, the rotor maintains its rotational position only by the attractive force of the magnet. Therefore, the position is stable, and even if a force for rotating the rotor acts from outside, the rotor does not rotate easily.

  In the actual control, for example, when a command to stop the drum 13 is given from a state in which the drum motor 20 is rotationally driven in the normal control, the control is switched to the above-described control, and the drum is controlled under the above-described control. The drum motor 20 is stopped when the motor 20 rotates by a predetermined angle after the Z-phase signal output only once during the rotation of the motor 20 is obtained. At this time, as described above, the position of the rotor 20b is fixed only by the attractive force of the magnet, so that the rotor 20b can be kept almost stationary regardless of the state of the load in the drum 13. For example, in the control example shown in FIG. 9, the torque motor 211 is controlled so that the lock pin 212 advances in this state. Thus, when the lock pin 212 is inserted into the slot of the engagement groove 25, the rotor 20b does not move, and almost no impact is applied to the lock pin 212.

  The above embodiment is an example of the present invention, and it is apparent that changes and modifications can be made as appropriate within the scope of the present invention.

1 is an external perspective view of a drum type washing machine according to an embodiment of the present invention. The side surface longitudinal section of the upper part of the drum type washing machine of a present Example. FIG. 2 is a front vertical sectional view of a main part inside the drum type washing machine of the embodiment. The left side view inside the drum type washing machine of a present Example. FIG. 3 is a vertical sectional view on the right side inside the drum type washing machine of the embodiment. FIG. 2 is an electric configuration diagram of a main part of the drum type washing machine of the embodiment. It is an enlarged view of a drum lock device, (A) is a state at the time of drum lock release, (B) is a state at the time of lock operation. 9 is a flowchart illustrating an example of a control method of a drum lock operation. 9 is a flowchart showing another control method of the drum lock operation. 9 is a flowchart showing still another control method of the drum lock operation. FIG. 5 is an operation principle diagram of drum control used in a drum locking operation in the drum type washing machine of the embodiment.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 ... Outer box 2 ... Top lid 3 ... Laundry inlet 10 ... Outer tub 100 ... Outer tub opening 101 ... Outer tub door 13 ... Drum 130 ... Drum opening 131 ... Drum door 14 ... Main shaft 16 ... First bearing case 20 ... Drum Motor 20a ... stator 20b ... rotor 20c ... rotation sensor 21 ... drum lock device 211 ... torque motor 212 ... lock pin 213 ... operating body 213a ... opening 215 ... cam 216 ... convex part 217 ... rotational position detector 25 ... engagement groove part 25a ... Guide piece 50 ... Control unit 51 ... Load drive unit

Claims (4)

In a drum-type washing machine in which an outer tub arranged in an outer box has a drum having a substantially cylindrical peripheral surface rotatably disposed about a horizontal axis or an inclined axis,
a) a shaft having one end fixed to the drum as the horizontal axis or the inclined axis,
b) a bearing in the outer tub that rotatably supports the shaft body;
c) a rotor attached to the other end of the shaft, and a drum rotation driving motor including a stator attached to the outer tub side,
d) drum locking means for stopping rotation of the motor rotor to fix the drum in a predetermined rotation position,
A drum type washing machine comprising: The motor is an outer rotor type motor, and the rotor of the motor has a concave portion for engagement, and the drum lock means has an operating body that advances or retreats toward the rotor, and a part of the operating body is The drum type washing machine according to claim 1, wherein the drum is locked by engaging with the concave portion. The drum-type washing machine according to claim 2, wherein the recess has guide pieces extending outward on both sides of an entrance of the recess. The drum type washing machine according to claim 2 or 3, wherein the concave portion is provided on an outer peripheral edge of the rotor.