MXPA98000731A - Motorized assembly, specifically for the legs of a woman - Google Patents

Abstract

A drive assembly, specifically for the legs of a wrist, consisting of a geared transmission where the outer wheel, supported by the body structure of the wrist, has two opposite eccentric pins (48, 48 '), one for each leg . In each of the pins is hooked, so that it can rotate, a U-shaped element (50 '), and is mounted on the structure of the body of the wrist, and restricted by it, in order to be driven by the respective Eccentric pin with an up and down movement and simultaneously with an oscillating movement. The U-shaped element has a pin (58) for mounting the leg, which can be mounted on it with the possibility that it can rotate around the past

Description

MOTOR SET, SPECIFICALLY FOR THE DOLL OF A DOLL DESCRIPTION The invention relates to the field of driving mechanisms for the extremities of a toy, in particular to mechanisms for moving the legs of a doll, in order to simulate the movement of walking.

Several mechanisms have already been designed to simulate the movement of walking in dolls. A common problem with these mechanisms is to reduce the total dimensions of them, so that they can be inserted into the body structure of a doll, even a small doll.

A prior patent application describes a mechanism of the aforementioned type, which makes an end gear move, starting from a worm driven by a motor energized by batteries. The end gear has two off-center means, 180 ° apart from each other, which move rigid wires placed on the legs of the wrist. Difficulties have been encountered in trying to print motion from a worm. A further disadvantage of the aforementioned mechanism is that it can only be applied to wrists that have legs integrated to the body, and can not be applied successfully to wrists that have their legs together. r In addition, the mechanisms currently available in the market for the movement of dolls with their legs together involve the use of a transmission with several gears, with too much volume, which can not be miniaturized to adapt them to the so-called "fashion dolls". ", which are usually small in size.

Accordingly, an object of the invention is to achieve the movement of the legs of a doll, effectively and resembling the movement of walking, using means of smaller size.

Another object of the invention is to obtain a system of movement such that it can be used in wrists with joined or articulated legs.

These objectives and others of the present invention have been achieved with a set as mentioned in claim 1. Other features are listed in the appended claims.

In other words, the new drive mechanism assembly is constituted, starting with a drive shaft that is contained in the body structure of a wrist, by a gear wheel transmission supported within the body structure, which ends in a s.alida wheel, which holds on two opposite sides two eccentric pins that are angularly decentered about 180 °, approximately, between them. Each pin is inserted, so that it can rotate, inside a contact element that supports the leg. Each support element of the leg is U-shaped, and a branch extending from the U makes contact with the eccentric pin. The leg support element is also inserted into a special opening in the body structure. The second branch of the U supports known means, which are suitable for engaging one end of a leg of the wrist, so that it can rotate about the axis of the pin.

The new assembly can be easily manufactured in small sizes and at low cost; allows a movement to walk quite similar to that of humans; can be adapted to dolls with legs together.

These and other features and advantages of the invention will become clearer in this specification by the description thereof, which is provided solely by way of illustrative but not limiting example, with reference to the accompanying drawings, in which: Figure 1 is a sectional view taken along a plane schematically indicated by 1-1 in Figure 2, through the body structure of a wrist; the transmission mechanism is shown by a side view; Figure 2 is a sectional view taken substantially along the plane 2-2 of Figure 1; Figure 3 is an enlarged sectional view of the U-shaped element supporting the leg, the upper part of the leg being mounted thereon; Figure 4 is a side view of an element supporting the leg, taken from the right in relation to figure 3; Figure 5 is a side view of the leg supporting element, taken from the left in relation to figure 3; Figure 6 shows two angularly decentered positions that can be adopted by the two elements, which are on the right and left hand, that support the leg, during the movement to walk; the plane in section of the drawings is the same as that of Figure 2; Figure 7 shows two vertically decentered positions, which can be adopted by the elements that are on the right and on the left, that support the leg, during the movement to walk.

Figure 8 shows various possible positions of the same element that holds the leg, during a cycle of operation.

In the drawings, the assembly of the invention has the reference number 10. It includes, in the body structure of a doll whose reference number is 12, two pairs of aligned housings 14, 14 * 'and 15, 15' vertically separated one of the other, to hold gear shafts or pulleys. Furthermore, the housings 16, 16 'and 17, 17' are made in a central part of the body whose reference number is 19. A drive mechanism, whose reference number is 20, includes a motor 22 whose drive shaft 24 is connected , by means of a belt 26 and a pulley 28, in order to rotate an axis 30 with the ends held in the housings 14, 14 '. A pinion 32 is mounted on the shaft 30 and meshes with a sprocket 34 supported by an axle 36. The axle 36 is mounted so that it can rotate in the recesses 15, 15 'of the body. In turn, the shaft 36 holds a pinion 38 which meshes with a gear wheel 40 which is carried by a rotating hub 42 held in the housings 16, 16 '. The gear 40 meshes with an end gear 44 carried in a hub or a short shaft 46, which rotatably supports the housings 17, 17 '. Two eccentric pins or pins, whose respective reference numbers are 48 and 48 ', are integrated with the gear 44 on opposite faces of the hub 46. These pins project laterally and are peripherally 180 ° apart from each other. Each pin 48 is inserted into a hole 49 of the leg supporting element, or of the leg supporting element whose general reference number is 50. The drawing of a single element holding the leg 50 is shown; it is understood that a similar element (not shown) is inserted in the pin 48 '. The leg supporting member 50 is U-shaped, taken from a front view, and includes a first branch 51 and a second branch 52. The first branch has said opening 49 and is housed in a housing 53 of the body structure of the body 50. the wrist formed between the central body 19 and a side wall 54. The lower part of the U projects through the slot 57 of the body of the wrist, and the branch 52 of the U is partially positioned outside the side wall 54 of the body structure and ends in a tapered portion 55 which is housed within the structure of the body through an opening 56. The slot 57 or the opening 56 has a limited extension, slightly greater than the width of the part 50 of the element introduced there. On the outward facing surface, the branch 52 has a pin 58 and detent projections 59, 59 circumferentially spaced apart. A leg G of the wrist, or a substantially rigid part thereof, is mounted on a toothed pin 58 by means of a bushing 60 housed in the space 62 of the leg, and a cover 64 with a cavity 68. A spring 65 and a washer 66 are placed between a projection 61 of the U-shaped element and the lid 64. The leg is inserted into the pin 58 by means of the teeth of the pin, which engage in the cavity 68 of the cover 64.

When the motor 22, energized, for example, with batteries, transmits movement to the drive shaft 24, (each reference number 70 indicates an existing space for placing the batteries in the body of the wrist), each of the eccentric pins 48 and 48 'transmits to the element that at that moment supports the leg, an upward and downward reciprocating movement and, due to the fact that the walls of the opening 57 or of the opening 56 act as a point of support, it is also transmitted an oscillating movement in combination with the ascending and descending movement, as can be seen in Figures 6, 7 and 8. This movement simulates the movement of the legs of a person walking quite well. More specifically, with reference to Figures 6 and 7, the item that is on the right hand side and holds the wrist leg has been marked with the number 50d, and the item on the left hand side that holds the wrist leg with the number 50s. In Figure 6 it can be seen that the two legs adopt a position like open scissors when the pins 48, 48 'are arranged with their axes in a horizontal plane (Figure 6) while adopting a vertically off-center position when the two pins 48, 48 'are aligned with their axes in a vertical plane (Figure 7). As can be seen in Figure 8, the leg of the wrist moves with a movement that mimics the walk of humans quite well.

It can be seen that the fact of supporting the axes of the gear wheels in special seats formed in the structure of the body of the wrist allows the mechanism to be miniaturized so that it can also be used on small dolls.

Claims (8)

1. A motor unit for the limbs, specifically the legs, of a toy, especially a doll, which contains in the structure of its body (12): a motor (22), an extreme or exit wheel (44), a mechanism of transmission of movement (20) between said motor and said extreme wheel, said extreme wheel having eccentric pins (48, 48 ') on opposite faces, angularly spaced apart from each other, characterized in that it also includes for each leg of at least a pair of toy legs, an element that holds the leg (50) inserted so that it can rotate in one of said pins (48) and that has connecting means for the leg.

2. A drive assembly according to claim 1, characterized in that said leg-supporting element (59) is U-shaped, and in that a first branch (51) of the U makes contact with said pin, and a second branch of the U holds that leg.

3. A drive assembly according to claim 2, characterized in that the second leg-supporting leg ram (50) has a toothed pin (58) that contacts a cap for introducing the leg.

4. A drive assembly according to claim 1, characterized in that the leg-supporting member is also inserted into a small-sized slot (56-57) of the body structure / in order to achieve an oscillating movement caused by the movement of said pin (48 or 48 ') and by the introduction in said groove.

5. A drive assembly according to claim 3, characterized in that the leg is mounted on the pin by means of a bushing (60) and a pressure spring 65, with a washer.

6. A drive assembly according to claim 1, characterized in that the end wheel is integrated to a hub (46) that is rotatably housed in a housing (17) formed in a central part (19) of the structure of the body.

7. A drive assembly according to claim 1, characterized in that the housings for supporting, in a rotational manner, the axes of the mechanism are formed directly in the structure of the body.

8. A drive assembly according to claim 1, characterized in that the mechanism (20) has, downstream of the drive shaft (24), a belt (26) to which said drive shaft transmits movement and moves a pulley (28). ), said pulley being integrated to a first shaft (30) that holds a pinion (32), said pinion (32) engaging with a gear wheel (34) of a second transmission shaft (36) which holds an additional pinion ( 38); the additional pinion (38) meshes with a gear wheel (40) which is housed in a central part (19) of the structure of the body of the toy, the additional wheel (40) engaging with the output wheel (44).