Multifunctional driving movement and plush doll

Abstract

The utility model discloses a multi-functional drive machine core and plush doll, including shell, drive motor, speed reducing mechanism, swing duplex gear, swing deflector rod, first actuating mechanism and second actuating mechanism, be equipped with arc-shaped chute in the shell, swing duplex gear's rotary shaft is installed in the chute in sliding mode, drive motor and speed reducing mechanism transmission connection, swing deflector rod is equipped with the first actuating mechanism, the second actuating mechanism is equipped with the second actuating mechanism. The speed reducing mechanism is meshed with the swing duplicate gear, the first end of the swing deflector rod is rotationally connected with a rotating shaft of the swing duplicate gear, and the second end of the swing deflector rod is in friction transmission with the speed reducing mechanism. Through friction transmission of a transmission duplex gear and a swing shifting rod, a driving motor is controlled to rotate clockwise and anticlockwise to enable the swing duplex gear to swing, so that the swing duplex gear is meshed with a first execution mechanism and a second execution mechanism respectively; only one driving motor drives the first executing mechanism and the second executing mechanism, the control mode is simple, the structure is simple, cost is low, the size is reduced, and the control mode is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of toys, in particular to a multifunctional driving movement and a plush doll. Background Art

[0002] A plush doll is a type of plush toy. It is a toy with a face made of plush fabric and other textile materials as the main fabrics, and filled with pp cotton, foam particles, etc. Traditional plush dolls have a single facial expression and cannot express emotions actively. Children often express emotions passively by pulling the face of the plush toy, which is not interesting. Existing plush dolls with emotional expression need to install multiple independently driven drive movements inside to drive the face and torso of the plush doll to deform for active emotional expression, but their structure is complex and takes up a lot of space, which affects the softness of the plush toy, so it is necessary to improve them. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a multifunctional driving movement and a plush doll, which simplifies the structure, reduces the cost, enriches the emotional expression content, provides fun, reduces the volume, and improves the softness.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multifunctional driving movement, including a shell, a driving motor, a reduction mechanism, a swinging double-linked gear, a swinging lever, a first actuator and a second actuator. An arc-shaped slide groove is arranged in the shell, and the rotating shaft of the swinging double-linked gear is slidably installed in the slide groove. The driving motor is transmission-connected with the reduction mechanism, and the reduction mechanism is meshed with the swinging double-linked gear. The first end of the swinging lever is rotationally connected with the rotating shaft of the swinging double-linked gear, and the second end of the swinging lever is friction-transmitted with the reduction mechanism. One end of the slide groove is set as a first transmission part and the other end is set as a second transmission part. When the swinging double-linked gear moves to the first transmission part, the first actuator is meshed with the swinging double-linked gear, and when the swinging double-linked gear moves to the second transmission part, the second actuator is meshed with the swinging double-linked gear.

[0005] In a further technical solution, the deceleration mechanism includes a first pulley, a second pulley, a transmission belt and a transmission double gear. The first pulley is fixedly mounted on the output shaft of the driving motor, the second pulley is connected to the first pulley through a transmission belt, a second belt gear is provided on one side of the second pulley, the second belt gear is meshed with the transmission double gear, the transmission double gear is meshed with the swinging double gear, and the second end of the swinging lever is frictionally transmitted with the transmission double gear.

[0006] In a further technical solution, the first actuator includes a first actuating gear, a first movable link, and a first pull rod. A first eccentric connecting portion is eccentrically provided on one side of the first actuating gear. The first end of the first movable link is rotatably connected to the first eccentric connecting portion, and the second end of the first movable link is hinged to the first pull rod. When the oscillating double gear moves to the first transmission portion, the oscillating double gear meshes with the first actuating gear.

[0007] In a further technical solution, the first pull rod is a U-shaped pull rod, and eyeball connecting portions are respectively provided at both ends of the first pull rod. The second end of the first movable link is hinged to the middle of the first pull rod.

[0008] In a further technical solution, the second actuator includes an intermediate gear, a second actuating gear, a second movable link, and a second lever. The intermediate gear meshes with the second actuating gear. The first end of the second lever is hinged to the housing, and the second end of the second lever is a free end. A second eccentric connecting portion is eccentrically provided on one side of the second actuating gear. The first end of the second movable link is rotatably connected to the second eccentric connecting portion, and the second end of the second movable link is rotatably connected to the middle of the second lever. When the oscillating double gear moves to the second transmission portion, the oscillating double gear meshes with the intermediate gear.

[0009] In a further technical solution, a friction limiting groove is provided on the side of the transmission double gear facing the oscillating lever. A rotary connecting sleeve is provided at the first end of the oscillating lever. The rotary connecting sleeve is sleeved on the rotating shaft of the oscillating double gear. A friction transmission portion is provided at the second end of the oscillating lever. The friction transmission portion is arranged in the friction limiting groove and frictionally transmits with the groove bottom of the friction limiting groove.

[0010] In a further technical solution, a PCB board and a power supply battery are further provided in the housing. The PCB board is provided with a control circuit. The power supply battery and the drive motor are electrically connected to the control circuit respectively. The drive motor has a clockwise rotation state and a counterclockwise rotation state.

[0011] When the drive motor is in the clockwise rotation state, the oscillating double gear moves to the first transmission portion, and the oscillating double gear meshes with the first actuator.

[0012] When the drive motor is in the counterclockwise rotation state, the oscillating double gear moves to the second transmission portion, and the oscillating double gear meshes with the second actuator.

[0013] In a further technical solution, the PCB board is further provided with an indicating light source. The housing is provided with a light-transmitting hole. The indicating light source is inserted into the light-transmitting hole. The control circuit is electrically connected to the indicating light source.

[0014] In a further technical solution, the outer shell includes a first housing and a second housing. The first housing and the second housing are buckled and clamped with each other. The first housing is provided with a motor fixing hole, and the second housing is provided with a battery slot. The driving motor is fixedly installed in the motor fixing hole, and the power supply battery is fixedly installed in the battery slot.

[0015] A plush doll includes a plush outer cover and a multifunctional driving mechanism core. The plush outer cover includes a trunk part and a head part. The head part is arranged on the upper part of the trunk part. The head part is provided with a mouth part and two eyeball parts. The outer shell is fixedly installed inside the head part and located at the mouth part. The first actuator is respectively connected to the two eyeball parts, and the second actuator extends to the trunk part and is fixedly connected to the inner side of the trunk part.

[0016] After adopting the above structure, the advantages of the present utility model compared with the prior art are as follows: Through the friction drive of the transmission double-connected gear and the swing lever, the swing double-connected gear swings by controlling the driving motor to rotate clockwise and counterclockwise, so that the swing double-connected gear meshes with the first actuator and the second actuator respectively. Only one driving motor is required to drive the first actuator and the second actuator. The control method is simple, the structure is simple, the cost is low, the volume is reduced, and the softness of the plush toy is improved. Only one multifunctional driving mechanism core is required to drive the plush doll to perform diverse emotional expressions; The first actuator and the second actuator are respectively connected to the plush doll, so as to drive the head part and the trunk part of the plush doll to achieve active emotional expression and increase the fun; The first actuator is eccentrically connected through the first execution gear and the first movable link to convert the rotational motion into a reciprocating motion, so as to drive the first pull rod to move the eyeball part of the plush doll. The second actuator is eccentrically connected through the second execution gear and the second movable link to convert the rotational motion into a reciprocating motion, so as to drive the second lever to perform an opening and closing motion, causing the trunk part of the plush doll to rise and fall. When the second lever performs an opening and closing motion, the outer shell receives a reverse acting force to form an opening and closing action, and is fixedly connected to the mouth part of the plush doll, so that the mouth part of the plush doll performs a front and back undulation, further enriching the emotional expression form of the plush doll. Description of the Drawings

[0017] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0018] Figure 1 is a schematic structural diagram of the multifunctional driving mechanism core of the present utility model;

[0019] Figure 2 is an exploded view of the multifunctional driving mechanism core of the present utility model;

[0020] Figure 3 is a schematic structural diagram of the plush doll of the present utility model;

[0021] Figure 4 is a schematic structural view of the multi-functional drive core of the present utility model installed on a plush doll;

[0022] Figure 5 is a schematic view of the state of the drive motor of the present utility model in the clockwise rotation state;

[0023] Figure 6 is a schematic view of the state of the drive motor of the present utility model in the counterclockwise rotation state.

[0024] In the figure:

[0025] 1 housing, 11 chute, 12 first housing, 121 motor fixing hole, 13 second housing, 131 battery slot, 14 light-transmitting hole;

[0026] 2 drive motor;

[0027] 31 first pulley, 32 second pulley, 321 second belt gear, 33 transmission belt, 34 transmission double gear, 341 friction limit groove;

[0028] 41 swing double gear, 42 swing lever, 421 rotary connecting sleeve, 422 friction transmission part;

[0029] 51 first execution gear, 511 first eccentric connecting part, 52 first movable connecting rod, 53 first pull rod, 54 eyeball connecting part;

[0030] 61 intermediate gear, 62 second execution gear, 621 second eccentric connecting part, 63 second movable connecting rod, 64 second lever;

[0031] 71 PCB board, 72 power supply battery, 73 indicating light source;

[0032] 8 plush outer cover, 81 trunk part, 82 head part, 821 mouth part, 822 eyeball part. Detailed implementation manners

[0033] The following are only the preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly.

[0034] A multi-functional drive core, as Figures 1 to 2As shown, it includes a shell 1, a driving motor 2, a reduction mechanism, a swing double gear 41, a swing lever 42, a first actuator and a second actuator. An arc-shaped slide groove 11 is arranged in the shell 1. The rotating shaft of the swing double gear 41 is slidably installed in the slide groove 11. The driving motor 2 is transmission-connected with the reduction mechanism, the reduction mechanism is meshed with the swing double gear 41, the first end of the swing lever 42 is rotationally connected with the rotating shaft of the swing double gear 41, the second end of the swing lever 42 is friction-transmitted with the reduction mechanism, one end of the slide groove 11 is set as the first transmission part, and the other end is set as the second transmission part. When the swing double gear 41 moves to the first transmission part, the first actuator is meshed with the swing double gear 41, and when the swing double gear 41 moves to the second transmission part, the second actuator is meshed with the swing double gear 41.

[0035] Traditional plush dolls cannot actively express emotions and are not interesting. Existing plush dolls that can express emotions often have multiple relatively independent driving movement movements inside the plush dolls, which not only takes up a large installation space, but also reduces the internal filling material of the plush dolls, resulting in poor softness of the plush dolls. The control procedures of multiple independently driven driving movement movements are complicated, difficult to control, and costly. The utility model uses friction transmission of the transmission double gear 34 and the swing lever 42, thereby controlling the drive motor 2 to rotate clockwise and counterclockwise to make the swing double gear 41 swings so that the swinging double gear 41 meshes with the first actuator and the second actuator respectively. Only one driving motor 2 is needed to drive the first actuator and the second actuator. The control method is simple, the structure is simple, the cost is low, the volume is reduced, and the softness of the plush toy is improved. Only one multifunctional driving movement is needed to drive the plush doll to express various emotions. The plush doll is connected to the first actuator and the second actuator respectively, thereby driving the head 82 and the trunk 81 of the plush doll to achieve active emotional expression and increase fun.

[0036] Specifically, the speed reduction mechanism includes a first pulley 31, a second pulley 32, a transmission belt 33, and a transmission double gear 34. The first pulley 31 is fixedly installed on the output shaft of the drive motor 2. The second pulley 32 is drivingly connected to the first pulley 31 through the transmission belt 33. A second belt gear 321 is provided on one side of the second pulley 32. The second belt gear 321 meshes with the large gear of the transmission double gear 34. The small gear of the transmission double gear 34 meshes with the large gear of the swing double gear 41. The second end of the swing lever 42 is in frictional transmission with the transmission double gear 34. The drive motor 2 drives the first pulley 31 to rotate. The first pulley 31 drives the second pulley 32 to rotate through the transmission belt 33. The second pulley 32 drives the transmission double gear 34 to rotate through the second belt gear 321. The transmission double gear 34 then drives the swing double gear 41 to rotate. The center of the arc-shaped chute 11 is located on the rotation axis of the transmission double gear 34, so that the swing double gear 41 always remains in a meshing state with the transmission double gear 34 during the swinging process. The speed reduction drive is carried out by means of pulley drive, with a simple structure, low cost, and quiet and stable operation.

[0037] Specifically, a PCB board 71 and a power supply battery 72 are further provided inside the housing 1. The PCB board 71 is provided with a control circuit. The power supply battery 72 and the drive motor 2 are electrically connected to the control circuit respectively. The drive motor 2 has a clockwise rotation state and a counterclockwise rotation state. Power is supplied to the drive motor 2 through the power supply battery 72. The drive event, drive speed, and rotation direction of the drive motor 2 are controlled through the control circuit, so as to obtain various combined actions and be able to perform diverse emotional expressions on plush dolls of different styles. By providing a remote control circuit or a wireless induction circuit on the PCB board 71, the functions of remote control and wireless induction can be realized, further improving the playability and interest.

[0038] When the drive motor 2 is in the clockwise rotation state, as Figure 5 shown, the swing double gear 41 moves to the first transmission part, and the swing double gear 41 meshes with the first actuator;

[0039] Specifically, the first actuator includes a first actuating gear 51, a first movable link 52, and a first pull rod 53. A first eccentric connecting portion 511 is eccentrically provided on one side of the first actuating gear 51. The first end of the first movable link 52 is rotatably connected to the first eccentric connecting portion 511, and the second end of the first movable link 52 is hinged to the first pull rod 53. When the swing double gear 41 moves to the first transmission portion, the large gear of the swing double gear 41 meshes with the first actuating gear 51. The transmission double gear 34 is in frictional transmission with the swing lever 42, so that the swing lever 42 swings, thereby driving the swing double gear 41 to move to the first transmission portion, so that the swing double gear 41 meshes with the first actuating gear 51. The rotation of the first actuating gear 51 drives the first movable link 52 to make a reciprocating motion, with a simple structure and low cost.

[0040] Specifically, the first pull rod 53 is a U-shaped pull rod, and eyeball connecting portions 54 are respectively provided at both ends of the first pull rod 53. The second end of the first movable link 52 is hinged to the middle of the first pull rod 53. By connecting with the eyeball portion of the plush doll through the eyeball connecting portion 54, the first movable link 52 is hinged to the first pull rod 53 through a hinge position, thereby driving the movement of the eyeball portion of the plush doll.

[0041] When the driving motor 2 is in the counterclockwise rotation state, as Figure 6 shown, the swing double gear 41 moves to the second transmission portion, and the swing double gear 41 meshes with the second actuator.

[0042] Specifically, the second actuator includes an intermediate gear 61, a second actuating gear 62, a second movable link 63, and a second lever 64. The intermediate gear 61 meshes with the second actuating gear 62. The first end of the second lever 64 is hinged to the housing 1, and the second end of the second lever 64 is a free end. A second eccentric connecting portion 621 is eccentrically provided on one side of the second actuating gear 62. The first end of the second movable link 63 is rotatably connected to the second eccentric connecting portion 621, and the second end of the second movable link 63 is rotatably connected to the middle of the second lever 64. When the swing double gear 41 moves to the second transmission portion, the large gear of the swing double gear 41 meshes with the intermediate gear 61. The transmission double gear 34 is in frictional transmission with the swing lever 42, so that the swing lever 42 swings in the reverse direction, thereby driving the swing double gear 41 to move to the second transmission portion, so that the swing double gear 41 meshes with the second actuating gear 62. The rotation of the second actuating gear 62 drives the second movable link 63 to make a reciprocating motion, thereby driving the second lever 64 to make an opening and closing motion. By the opening and closing motion of the second lever 64, the surface of the plush doll is driven to undulate, which can simulate the breathing of the plush toy and enrich the emotional expression.

[0043] Specifically, a friction limiting groove 341 is provided on one side of the transmission double gear 34 facing the swing lever 42. A rotary connecting sleeve 421 is provided at the first end of the swing lever 42. The rotary connecting sleeve 421 is sleeved on the rotating shaft of the swing double gear 41. A friction transmission part 422 is provided at the second end of the swing lever 42. The friction transmission part 422 is arranged in the friction limiting groove 341 and frictionally transmits with the groove bottom of the friction limiting groove 341. The friction limiting groove 341 limits the friction transmission part 422 to prevent the transmission double gear 34 from separating from the swing lever 42, thereby improving reliability and stability.

[0044] Specifically, the PCB board 71 is further provided with an indicating light source 73. The housing 1 is provided with a light-transmitting hole 14. The indicating light source 73 is inserted into the light-transmitting hole 14. The control circuit is electrically connected to the indicating light source 73. The indicating light source 73 is set as a light-emitting LED to reflect the working state of the multifunctional driving mechanism, or the indicating light source 73 is set as a distance sensor or a light sensor to sense the surrounding environment and automatically execute different driving modes to further improve the interactivity.

[0045] Specifically, the housing 1 includes a first housing 12 and a second housing 13. The first housing 12 and the second housing 13 are buckled and clamped with each other. The first housing 12 is provided with a motor fixing hole 121, and the second housing 13 is provided with a battery slot 131. The driving motor 2 is fixedly installed in the motor fixing hole 121, and the power supply battery 72 is fixedly installed in the battery slot 131. The housing 1 is formed by buckling the first housing 12 and the second housing 13, which is convenient for production and processing. The driving motor 2 is fixed through the motor fixing hole 121, and the power supply battery 72 is fixed through the battery slot 131, without occupying the internal space of the housing 1, thereby improving the heat dissipation effect of the driving motor 2 and the power supply battery 72.

[0046] A plush doll, such as Figures 3 to 6As shown, it includes a plush coat and a multifunctional driving movement. The plush coat 8 includes a torso 81 and a head 82. The head 82 is connected to the torso 81. The head 82 is provided with a mouth 821 and two eyeballs 822. The outer shell 1 is fixedly installed inside the head 82 and located at the mouth 821. The first actuator is respectively connected to the two eyeballs 822. The second actuator extends to the torso 81 and is fixedly connected to the inner side of the torso 81. The first actuator is connected eccentrically with the first actuator gear 51 and the first movable link 52 to convert the rotational motion into reciprocating motion, thereby driving the first pull rod 53 to move the eyeball 822 of the plush doll. The second actuator is connected eccentrically with the second actuator gear 62 and the second movable link 63 to convert the rotational motion into reciprocating motion, thereby driving the second lever 64 to open and close, so that the torso 81 of the plush doll fluctuates. When the second lever 64 opens and closes, the shell 1 is subjected to a reverse force to form an opening and closing action, and is fixedly connected with the mouth 821 of the plush doll, so that the mouth 821 of the plush doll fluctuates back and forth, thereby further enriching the emotional expression of the plush doll. Of course, the first actuator and the second actuator are not limited to the linkage of the mouth 821, the eyeball 822 and the torso 81 of the plush doll. The multifunctional driving movement can be connected and installed according to different positions of plush dolls of different styles and models to achieve different action simulations.

[0047] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A multifunctional driving mechanism, characterized in that: The invention comprises a housing (1), a driving motor (2), a speed reducing mechanism, a swing double gear (41), a swing lever (42), a first actuator and a second actuator. An arc-shaped slide groove (11) is arranged in the housing (1). The rotating shaft of the swing double gear (41) is slidably installed in the slide groove (11). The driving motor (2) is transmission-connected with the speed reducing mechanism. The speed reducing mechanism is meshed with the swing double gear (41). The first end of the swing lever (42) is rotationally connected with the rotating shaft of the swing double gear (41). The second end of the swing lever (42) is frictionally transmitted with the speed reducing mechanism. One end of the slide groove (11) is arranged as a first transmission part and the other end is arranged as a second transmission part. When the swing double gear (41) moves to the first transmission part, the first actuator is meshed with the swing double gear (41). When the swing double gear (41) moves to the second transmission part, the second actuator is meshed with the swing double gear (41).

2. The multifunctional driving movement according to claim 1, wherein: The deceleration mechanism comprises a first pulley (31), a second pulley (32), a transmission belt (33) and a transmission double gear (34); the first pulley (31) is fixedly mounted on the output shaft of the driving motor (2); the second pulley (32) is transmission-connected to the first pulley (31) via the transmission belt (33); a second belt gear (321) is provided on one side of the second pulley (32); the second belt gear (321) is meshed with the transmission double gear (34); the transmission double gear (34) is meshed with the swing double gear (41); and the second end of the swing lever (42) is frictionally driven with the transmission double gear (34).

3. The multifunctional driving core according to claim 2, wherein: The first actuator comprises a first actuator gear (51), a first movable link (52) and a first pull rod (53); a first eccentric connecting portion (511) is eccentrically arranged on one side of the first actuator gear (51); a first end of the first movable link (52) is rotationally connected to the first eccentric connecting portion (511); a second end of the first movable link (52) is hinged to the first pull rod (53); and when the swing double gear (41) moves to the first transmission portion, the swing double gear (41) meshes with the first actuator gear (51).

4. A multifunctional driving core according to claim 3, characterized in that: The first pull rod (53) is a U-shaped pull rod, and eyeball connecting parts (54) are respectively provided at both ends of the first pull rod (53), and the second end of the first movable connecting rod (52) is hinged to the middle part of the first pull rod (53).

5. A multifunctional driving core according to claim 2, characterized in that: The second actuator includes a transition gear (61), a second actuator gear (62), a second movable link (63), and a second lever (64). The transition gear (61) meshes with the second actuator gear (62). The first end of the second lever (64) is hinged to the housing (1), and the second end of the second lever (64) is a free end. A second eccentric connection portion (621) is eccentrically provided on one side of the second actuator gear (62). The first end of the second movable link (63) is rotatably connected to the second eccentric connection portion (621), and the second end of the second movable link (63) is rotatably connected to the middle of the second lever (64). When the oscillating double gear (41) moves to the second transmission portion, the oscillating double gear (41) meshes with the transition gear (61).

6. The multifunctional driving core according to claim 2, characterized in that: A friction limiting groove (341) is provided on one side of the transmission double gear (34) facing the oscillating lever (42). A rotary connection sleeve (421) is provided at the first end of the oscillating lever (42). The rotary connection sleeve (421) is sleeved on the rotary shaft of the oscillating double gear (41). A friction transmission portion (422) is provided at the second end of the oscillating lever (42). The friction transmission portion (422) is arranged in the friction limiting groove (341) and frictionally transmits with the bottom of the friction limiting groove (341).

7. A multifunctional driving core according to any one of claims 1 to 6, characterized in that: A PCB board (71) and a power supply battery (72) are further provided in the housing (1). The PCB board (71) is provided with a control circuit. The power supply battery (72) and the drive motor (2) are electrically connected to the control circuit respectively. The drive motor (2) has a clockwise rotation state and a counterclockwise rotation state. When the drive motor (2) is in the clockwise rotation state, the oscillating double gear (41) moves to the first transmission portion, and the oscillating double gear (41) meshes with the first actuator. When the drive motor (2) is in the counterclockwise rotation state, the oscillating double gear (41) moves to the second transmission portion, and the oscillating double gear (41) meshes with the second actuator.

8. A multifunctional driving core according to claim 7, characterized in that: The PCB board (71) is further provided with an indicating light source (73). A light-transmitting hole (14) is provided on the housing (1). The indicating light source (73) is inserted into the light-transmitting hole (14), and the control circuit is electrically connected to the indicating light source (73).

9. A multifunctional driving core according to claim 7, characterized in that: The housing (1) includes a first housing (12) and a second housing (13). The first housing (12) and the second housing (13) are buckled and clamped with each other. The first housing (12) is provided with a motor fixing hole (121), and the second housing (13) is provided with a battery slot (131). The drive motor (2) is fixedly installed in the motor fixing hole (121), and the power supply battery (72) is fixedly installed in the battery slot (131).

10. A plush doll, characterized in that: It includes a plush outer coat and the multifunctional driving mechanism core according to any one of claims 1 to 9. The plush outer coat (8) includes a trunk part (81) and a head part (82). The head part (82) is connected to the trunk part (81). The head part (82) is provided with a mouth part (821) and two eyeball parts (822). The outer shell (1) is fixedly installed inside the head part (82) and is located at the mouth part (821). The first actuating mechanism is respectively connected to the two eyeball parts (822). The second actuating mechanism extends to the trunk part (81) and is fixedly connected to the inner side of the trunk part (81).

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