JPH0515358Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention uses a wound spring as a drive source, which can be loaded into a narrow space and does not require much force, making it suitable for use as a power source for toys such as toy cars. Regarding the improvement of a spring motor that increases speed with a gear train via an idler, in more detail, the number of support shafts of the speed increasing gear train is reduced, the speed increasing gear train is arranged three-dimensionally, and all the support shafts are made of a case. By eliminating the need for another intermediate frame that supports the support shaft, the outer dimensions are reduced and the structure is simplified, and the case, support shaft, and gear group can be easily assembled. Therefore, the present invention relates to a suitable structure of a spring motor which can be manufactured compactly by significantly simplifying the entire mechanism, and which can be easily installed in a toy or the like having a small space.

[Prior Art] Generally, spring motors are often used as a power source for toys and the like. Among these spring motors, those related to this invention use a wound spring such as a spiral spring as a driving source. This type of spring motor can be installed in a narrow space, directly transmits torque, and provides large angular displacement, so it is often used in toys, etc. It can control the strong force of the mainspring spring, and can be used for long periods of time. It uses a gear train and a feedback mechanism to enable rotation. Also, a speed governor is usually used to control the rotational speed.

For example, an example of a conventional technique related to a spring motor using a wound spring as a drive source used in toys is a pullback type spring drive source used in toys such as Chiyoro Q. This pullback type mainspring drive source is shown in FIGS. 7 to 10.

Fig. 7 is a front view of the pullback type mainspring drive source, Fig. 8 is a sectional view taken along line C-C' in Fig. 7, and Fig. 9 is a diagram for explaining the transmission system of the gear train when winding up the mainspring spring. In the figures, a is a side view of longitudinal section D-D' of b, b is a front view, and FIG. -E′ side view, b is a front view, b in FIGS. 9 and 10;
Both are front views seen from the shaft side of a, that is, the opposite side of the mainspring spring.

In these figures, 38 is the drive pinion 39
is fixed to the drive shaft (in Figures 9 and 10, the shaft center -
), 40, 41, and 42 are intermediate shafts (axis centers -, -, -, respectively), and 43 is a winding shaft (axis center -) to which the spring end of the mainspring spring 44 is fixed. The intermediate shaft 40 has an intermediate drive gear 4 that meshes with the drive pinion 39 at one end.
5 is loosely fitted to the other end, and an idle pinion 46 is loosely fitted to the other end, and between the intermediate drive gear 45 and the idle pinion 46 is a driven clutch that is fixed to the intermediate drive gear 45 and has a serrated side tooth profile on the periphery. 47
A one-way clutch 49 with serrated side teeth is loosely fitted therein, and is constituted by a driving clutch 48 which is fixed to the idler pinion 46 and has a serrated pawl. Further, a winding gear 50 is fixed to one end of the winding shaft 43 near the mainspring spring 44, and a winding gear 51 is fixed to the other end of the winding shaft 43.
A rewinding pinion 52 that meshes with the rewinding gear 50 is loosely fitted to one end, and an idle gear 53 that meshes with the idler pinion 46 is loosely fitted to the other end. Further, a planetary pinion 54 is fixed to the intermediate shaft 41 and rotates planetarily around the winding gear 51 around the winding shaft 43 and meshes with the winding gear 51 and the intermediate drive gear 45. and,
The drive shaft 38 and the winding shaft 43 are supported by the case 55 and the lid 56, the intermediate shafts 40 and 41 are supported by the lid 56 and the intermediate frame 57, and the intermediate shaft 42 is supported by the case 55 and the intermediate frame 57, respectively.

The transmission system of the gear train during winding up and unwinding of the mainspring spring of the pullback type mainspring drive source constructed as described above will be briefly explained with reference to FIGS. 9 and 10. When winding up the mainspring spring 44, the planetary pinion 54 moves toward the winding gear 5, as shown by the solid line in FIG. 9a and the arrow in b.
1 and is operated to mesh with the intermediate drive gear 45. Subsequently, when the drive shaft 38 is rotated counterclockwise around the axis,
This rotation is caused by the intermediate drive gear 45 and the planetary pinion 5.
4. It is transmitted through the winding gear 51, and the winding shaft 43 is rotated clockwise about the axis -. Therefore, the mainspring spring 44 is wound up. At this time, the driven clutch 47 rotates clockwise about its axis while being decelerated by the meshing of the drive pinion 39 and the intermediate drive gear 45, while the driving clutch 48 rotates clockwise around the axial center. It rotates clockwise about its axis while being accelerated through the pinion 52, idle gear 53, and idle pinion 46. Therefore, since the driving clutch 48 is rotating faster than the driven clutch 47, the teeth and pawls of these clutches do not mesh.

Next, when the mainspring spring 44 is unwound, the planetary pinion 54 is planetarily rotated around the winding gear 51 and disengaged from the intermediate drive gear 45, as shown by the solid line in FIG. 10a and the arrow in b. It is manipulated so that Subsequently, when the winding shaft 43 is rotated counterclockwise around the shaft center by the elastic force of the mainspring spring 44, this rotation is caused by the winding gear 50, the winding pinion 52, the idle gear 53, and the idle gear. The power is transmitted through the pinion 46 at increased speed, causing the driving clutch 48 to rotate counterclockwise about the axis. Since the serrated claws of the driving clutch 48 mesh with the serrated side teeth of the driven clutch 47, the intermediate drive gear 4
5 is rotated counterclockwise around the shaft center, and this rotation is further accelerated to drive the drive pinion 3.
Conducted to 9. Therefore, the drive shaft 38 is centered at -
rotated clockwise around the center. In addition, at this time, the rotation of the winding gear 51 is caused by the planetary pinion 54.
Because the mesh with the intermediate drive gear 4 is disengaged,
5 is not conducted. Due to the above structure, the output rotation speed is higher than the winding rotation speed.

[Problems to be solved by the invention] However, in the above configuration, since the speed-increasing gear train is arranged in a plane, the external shape is inevitably bulky (larger in the vertical direction). wozu,
Further, the intermediate shaft 41 supporting the planetary pinion 54 is disposed at a position passing through the rewinding gear 50 and the idle gear 45 from the side, and the intermediate shaft 42
Since the intermediate frame 57 for supporting these intermediate shafts is disposed at a position passing through the planetary pinion 54 from the side, the intermediate frame 57 that supports these intermediate shafts must be disposed outside the case and the lid. Therefore, it has the disadvantage that the arrangement of parts is complicated and assembly is not easy. In order to eliminate the above-mentioned drawbacks of conventional spring motors of the same type, this invention reduces the number of support shafts of the speed-increasing gear train, eliminates the need for an intermediate frame that supports them, and simplifies the structure. It is an object of the present invention to provide a spring motor suitable for toys, etc., which can be assembled into a compact overall structure by arranging gear trains three-dimensionally, is easy to assemble, and can be made compact and compact.

[Means for Solving the Problems] In order to achieve the above object, the spring motor of the present invention uses a spiral spring such as a spiral spring as a drive source and speeds up using a gear train via an idler. It has three shafts: two support shafts that support the speed gear train, and a drive shaft whose tip protrudes from the case. A wound spring such as a mainspring spring supported on one support shaft is disposed between the initial stage gear and the case, and a speed regulating means is provided at the final stage of the speed increasing gear train supported on the other support shaft. A one-way transmission means for transmitting rotation in the winding direction of the winding spring is provided between the drive pinion fixed to the drive shaft and the winding pinion rotatably supported on the drive shaft, and The gist is that one-way transmission means supported by the other support shaft that transmits rotation in the unwinding direction of the winding spring is provided between the final stage gear of the gear train, the winding pinion, and the speed regulating means. do.

[Operation] In the spring motor of this invention configured as described above, the number of support shafts of the speed increasing gear train is reduced to three, and all the support shafts are supported by the case and the lid. Because it is arranged three-dimensionally,
An intermediate frame is not required, the structure is simplified, the overall structure can be assembled with low bulk, and a small and compact spring motor can be obtained. Furthermore, a speed governor is incorporated in the final stage of the speed increasing gear train, and a one-way clutch is installed between the drive pinion and the hoisting pinion that transmits rotation only in the winding direction of the winding spring, and the speed governor and the governor drive pinion. A one-way ratchet clutch that transmits rotation only in the unwinding direction of the winding spring is provided between the drive pinion's rotation transmission gear train and the winding pinion's rotation transmission gear train. This makes it possible to reliably control the speed-up gear train and to reliably avoid support due to feedback of the speed-increasing gear train. Furthermore, during assembly, after arranging the drive pinion that is fixed to the drive shaft, the speed governor and the speed increasing gear group are sequentially fitted onto the three support shafts and arranged in a stacked manner, which greatly simplifies assembly. It can be facilitated.

[Embodiment of the invention] This invention will be explained in detail below using an example shown in FIGS. 1 to 6. Fig. 1 is a cross-sectional view taken along the line A-A' in Fig. 2, which shows an embodiment of the spring motor according to the present invention, Fig. 2 is a top side view of the same, (a view with the vertical direction turned to the horizontal direction), and Fig. 3 is a sectional view taken along line A-A'. This is a side view of the one-way ratchet clutch same as the above, seen from the mainspring spring side in Fig. 1. Fig. 4 is a side view showing the general structure of the same speed governor as shown in Fig. 1. A view seen in the direction of the spring, Figure 5 is a diagram for explaining the transmission system of the speed increasing gear train when winding up the same mainspring spring, and Figure 6 is a view of the speed increasing gear train when unwinding the same main spring spring. FIG. 3 is a diagram for explaining a conduction system. In addition, in FIGS. 5 and 6, a is a side view taken along the longitudinal section B-B' of b, and b is a front view. In addition, in FIGS. 1 to 6 excluding FIG. 3, in order to simplify the explanation below,
The rotational directions of rotating elements such as shafts, gears, and clutches are shown as viewed from the governor side in the direction of the mainspring spring in FIG.

In these figures, 1 is the case, 2 is the lid,
The case 1 and the lid 2 are constructed so that three pins implanted in the case 1 are fitted into holes 4 provided in the lid 2, so that the case 1 and the lid 2 are integrated. 5 is mounted on a shaft between case 1 and lid 2, and both ends are connected to case 1 and lid 2.
This is a drive shaft (axial center line) that protrudes outward from the drive shaft and has a drive pinion 6 fixed thereto. Drive shaft 5
A hoisting pinion 7 is loosely fitted on the right side of the drive pinion 6 (FIG. 1). Also, on the right side of the drive pinion 6 is a drive clutch 8 having serrated side teeth.
is fixed, and a driving clutch 8 is installed on the left side of the hoisting pinion 7 at two positions that equally divide the circumferential direction.
A driven clutch 9 having a serrated pawl that engages with the serrated side teeth of the clutch is fixed, and a compression spring 10 loosely fitted to the drive shaft 5 is tensioned between the winding pinion 7 and the lid 2. has been done. The driven clutch 9 is always pressed toward the driving clutch 8 by the elastic force of the compression spring 10 and is configured to mesh with the driving clutch 8, and the teeth of these clutches rotate counterclockwise around the axis line. It is set so that rotation can be transmitted only by rotation in the direction. That is, these clutches 8 and 9 constitute a one-way clutch capable of transmitting rotation only in the winding direction of the mainspring spring. The mechanism itself of this one-way clutch is the same as the conventionally known mechanism, so a detailed explanation will be omitted.

On the other hand, a support shaft 11 (axis center line) is fixed to the case 1 and the lid 2 diagonally above the drive shaft (Fig. 2). , a governor pendulum 12 to be described later, a drive gear 14 to which a driven pinion 13 is fixed and meshes with the drive pinion 6, and an intermediate gear 1 to which an intermediate pinion 15 is fixed and meshes with the hoisting pinion 7.
6, and a sales gear 19 having a long sleeve 18 for winding a mainspring spring 17 is loosely fitted therein. One end of the mainspring spring 17 is hooked to a pin 20 implanted in the sleeve 18, and the other end is hooked to a spring hook 21 (FIG. 2, details not shown) formed in the case 1. , wrapped around the sleeve 18. Also, pendulum 12
As shown in FIG.
plow 2 supported by a sleeve fixed to 2;
4, and constitutes a speed governor 25 facing an escape wheel which will be described later.

On the other hand, vertically above the support shaft 11 (FIG. 2), an intermediate shaft 26 (axis center line) is fixed to the case 1 and the lid 2, and this intermediate shaft 26 has a left side (first
The escape wheel 2 constituting the speed governor 25 is shown in order from FIG.
7. An intermediate hoisting gear 32 to which a governor drive pinion 28, a driven gear 29, an intermediate drive pinion 30, and an intermediate hoisting pinion 31 are fixed is loosely fitted. In addition, the escape wheel 27 and the driven gear 29
As shown in Fig. 3, the side surface is hollowed out circularly to a depth smaller than the tooth width and has an appropriate thickness up to each root circle, and a serrated internal tooth profile is formed on the circumference. Ratchets 33 and 34 are formed respectively on the left side of each gear of the governor drive pinion 28 and intermediate drive pinion 30 (FIG. 1), and two ratchets are formed at two positions that bisect the circumferential direction. Fixed ratchet wheels 35, 36 are formed by resilient arms having serrated pawls that engage the serrated internal teeth of the ratchets 33, 34. The ratchet wheels 35, 36 are configured such that their serrated claws constantly press the ratchets 33, 34 outward in the radial direction and engage with the ratchets 33, 34 by the elastic force of the elastic arms. The teeth of these ratchets and ratchets are set so that rotation can only be transmitted by clockwise rotation about the axis. That is, these ratchets 3
3 and the ratchet wheel 35, and the ratchet 34 and the ratchet wheel 36 each constitute a one-way ratchet clutch capable of transmitting rotation only in the unwinding direction of the mainspring spring. Furthermore, the escape wheel 27 that faces the pendulum 12 and constitutes the speed governor 25 is constructed from the
It has the same shape as the escape wheel disclosed in No. 55-8549, and has star teeth 37 at equal intervals on the circumference, as shown in FIG. Note that the ratchet 33 and ratchet wheel 35 and the ratchet 34 and ratchet wheel 36
The mechanisms of each of the one-way ratchet clutches and the governor 25, which consists of an escape wheel 27 and a pendulum 12, are the same as those conventionally known, and detailed explanations thereof will be omitted. In addition, in FIGS. 5 and 6, in order to facilitate the explanation of the transmission system of the speed-increasing gear train, the serrated internal tooth ratchets 33 and 34 are shown as serrated side teeth, and the ratchets 35 and 36 are is shown as a serrated side claw.

In the above configuration, the operation of the embodiment of this invention will be explained with reference to FIGS. 5 and 6.
When the mainspring spring 17 is wound up, the drive shaft 5 is rotated counterclockwise around the axis as shown by the solid line in FIG. Winding pinion 7, intermediate gear 16, intermediate pinion 1
5. It is transmitted through the intermediate hoisting gear 32 and the intermediate hoisting pinion 31, and rotates the hoisting gear 19 clockwise about the axis -. Therefore, the pin 2 is attached to the sleeve 18 of the winding gear 19.
The mainspring spring 17, which is latched at 0, is wound around the sleeve 18. At this time, the intermediate drive pinion 30 meshing with the intermediate gear 16 is also rotated counterclockwise around the axis, but the ratchet 36 is rotated against the ratchet 34 while resisting the elastic force of the elastic arm. The gears do not mesh and rotate idly, so that the rotation of the driven gear 19 is not transmitted. Further, the rotation of the drive pinion 6 causes the governor drive pinion 28 to rotate counterclockwise around the axis via the drive gear 14, but similarly to the above, the ratchet 35 does not mesh with the ratchet 33. It idles and therefore no rotation is transmitted to the escape wheel 27.

Next, when the mainspring spring 17 is unwound, the sleeve 18 is rotated counterclockwise around the axis by the elastic force of the mainspring spring 17, as shown by the solid line in FIG. 6a and the arrow in b. This rotation is caused by the hoisting gear 19, the intermediate hoisting pinion 31, the intermediate hoisting gear 32, and the intermediate pinion 1.
5. The transmission is accelerated through the intermediate gear 16 and the intermediate drive pinion 30, and the ratchet 36 is rotated as the axis.
Since the gear is rotated clockwise around
Rotate clockwise around the axis -,
Furthermore, this rotation is caused by the driven pinion 13 and the driving gear 1.
4 to drive the drive pinion 6 to the axis -
Rotate clockwise around the center. Accordingly, the drive shaft 5 fixed to the drive pinion 6 is also sped up and rotated clockwise about the shaft center. Further, since the rotation of the drive gear 14 causes the governor drive pinion 28 to rotate clockwise around the axis, the ratchet wheel 35 meshes with the ratchet 33 and rotates the escape wheel 27 clockwise around the axis. Rotate it. Therefore, as shown in FIG.
The pendulum 12 is engaged with the claw 22 to swing the pendulum 12 clockwise about the axis - as shown by the two-dot chain line, and then the pendulum 12 is caused to swing clockwise about the axis - as shown by the two-dot chain line. By repeating the swinging of the pendulum 12 in this manner, speed regulation is performed as is well known. In addition, at this time, the winding pinion 7 which is also meshed with the gear 16 in the middle is also centered on the axis -
At the same time, the driven clutch 9 is also rotated clockwise about the shaft center.
The rotational speed of the driving clutch 8, which rotates clockwise around
Since the driving clutch 8 is rotating faster, the driving clutch 8 presses the slope of the serrated side claw of the driven clutch 9 with the slope of its serrated side tooth, and the driven clutch 8 resists the elastic force of the compression spring 10. 9 to the right (Figure 1)
Rotate while pushing it away. Therefore, the hoisting pinion 7 only idles and does not cause any trouble to the drive pinion 6. In this way, when the mainspring spring 17 is unwound, the drive shaft 5 is sped up, and rotates clockwise around the shaft center while the rotational speed is controlled by the speed governor 25, ensuring that the drive shaft 5 is used as an output shaft. It continues to rotate.

[Effects of the invention] As described in detail above, according to the spring motor of this invention, the number of support shafts supporting the speed increasing gear train, the speed governor, and the mainspring spring is reduced to only three;
In addition, the speed-increasing gear train, speed governor, mainspring spring, etc. are arranged three-dimensionally on these support shafts, which are supported only by the case and lid, so the structure is simplified without the need for an intermediate frame. This has the effect that the entire structure can be assembled at a low volume. Furthermore, a speed governor is installed at the final stage of the speed increasing gear train, and two types of one-way clutches with different rotation transmission directions are installed at three locations in the gear transmission train between the drive pinion and the speed governor drive pinion. , reliable control of the rotational speed and disturbances due to feedback of the speed-up gear train can be completely avoided. Furthermore, when assembling, all that is required is to sequentially fit the speed governor, speed increasing gear group, etc. onto the three support shafts, arrange them in a stacked manner, and connect the case and lid with pins to integrate them. This has great effects, such as significantly simplifying assembly.

The embodiments of this invention have been described above, but of course this invention is not limited to these embodiments, and various design improvements can be made without departing from the spirit of this invention. For example, instead of a one-way ratchet clutch, a spring clutch can be used, and both the driving and driven ratchets of the one-way clutch can have tooth profiles on the entire circumference or other types of well-known one-way clutches. The speed mechanism can be a centrifugal governor type instead of a pendulum type, and a coil spring can be used instead of a spiral spring.

[Brief explanation of the drawing]

1 is a sectional view taken along the line A-A' in FIG. 2 showing an embodiment of the spring motor according to the present invention; FIG. 2 is a top side view of the same; FIG. Fig. 4 is a side view showing the general configuration of the speed governor, Fig. 5 is a diagram for explaining the transmission system of the speed increasing gear train when winding up the mainspring spring, and Fig. 6 is a diagram showing the transmission system of the speed increasing gear train when winding up the mainspring spring. A diagram for explaining the transmission system of the speed increasing gear train during rewinding, FIG. 7 is a front view of a pullback type mainspring drive source showing an example of the conventional technology, and FIG.
A sectional view taken along the line C-C' in Figure 9. Figure 9 is a diagram for explaining the transmission system of the gear train when winding up the same mainspring spring. Figure 10 is a diagram for explaining the transmission system of the gear train when the same mainspring spring is unwinding. It is a figure for explaining. 1... Case, 2... Lid, 5... Drive source, 6...
...Drive pinion, 7...Hoist pinion, 8...
...Driving clutch, 9...Driven clutch, 10...
Compression spring, 11... Support shaft, 12... Pendulum, 17... Mainspring spring, 19... Winding gear, 25... Speed governor, 26... Intermediate shaft, 27...
Escape wheel, 28... Governor drive pinion, 29...
... Driven gear, 30 ... Intermediate drive pinion, 33,
34... Ratchet, 35, 36... Ratchet wheel.

Claims (1)

[Scope of utility model registration request] In a spring motor that uses a wound spring such as a mainspring spring as a drive source and increases speed by a gear train via an idler, there are two support shafts that support the speed-increasing gear train and a drive shaft whose tip protrudes from the case. A wound spring such as a spiral spring, which has a main shaft, at least the drive source is rotatably supported by the case, and is supported by one support shaft between the first gear of the speed increasing gear train and the case. A speed regulating means is provided at the final stage of the speed increasing gear train supported on the other support shaft, and a drive pinion fixed to the drive shaft and a hoisting pinion rotatably supported on the drive shaft are provided. A one-way transmission means for transmitting the rotation in the winding direction of the winding spring is provided between them, and a winding of a winding spring is provided between the final gear of the speed increasing gear train, the winding pinion, and the speed governing means. A spring motor characterized in that it is provided with a one-way transmission means supported by the other support shaft that transmits rotation in the return direction.