JPH01279128A - Device for slow shifting - Google Patents

Abstract

PURPOSE:To keep a shifting member shifting at moderate speed by installing a spring for providing turning force to a shaft between the shifting member and the shaft, then sealing the spring with viscous grease to control the turning force of the spring, and then engaging a pinion attached to the shaft with the rack of the fixed member. CONSTITUTION:On the rear end portion of an inner case 10 inserted into an outer case 20 in such a manner that the inner case is capable of freely going in and out of the outer case, is formed a through hole 2 in such a manner that the same may traverse across the inner case 10. In side the through hole 2 is rotatably formed a shaft provided with pinions 5 attached to both ends thereof and also a torsion spring 6 is attached to the shaft so that the shaft may turn by means of the wind-off of the torsion spring 6. The through hole 2 is filled inside with viscous grease, by means of which the spring 6 winds off more slowly so that the rotation of the shaft is slowed down. Therefore, the running speed of the pinion 5 is moderated on the rack 8 formed on the outer case 20 and hence the inner case 10 can be drawn out at moderate speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a slowing device that controls the speed of movement of a movable member that automatically moves relative to a fixed member.

[Prior Art and its Problems] Conventionally, as a movable member that moves relative to a fixed member, there are, for example, an article storage container, an article placement plate on a workbench, or a sliding top plate on a dining table.

Conventionally, such containers, mounting plates, or top plates have been moved manually to achieve their purpose.

That is, the accessory case consists of an outer case and an inner case that retracts from the outer case, and the inner case is manually moved to store or take out small items.

However, as products have become more sophisticated in recent years, there has been a demand for automation of movable parts that move relative to fixed members, but those that use the repulsive force of springs cannot control the speed of movement. However, when a damper device is attached for this control, there are problems in that the device becomes complicated and large in size, and therefore, no one that satisfies the above requirements has been put into practical use.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to make it possible to control the speed of a movable member that moves relative to a fixed member, even though it utilizes the repulsive force of a spring. To provide a slowing device that has a simple structure and can be made compact.

[Means for Solving the Problems] The present invention achieves the above object by incorporating a spring that stores movement energy in a movable member that moves relative to a fixed member, and viscous grease that controls the speed of the movable member by this spring. This is what I did.

That is, the present invention includes a movable member that moves relative to a fixed member, a rack provided on the fixed member, a shaft rotatably attached to the movable member, and a movable member that is attached to the shaft and meshes with the rack. A spring installed between the movable member and the shaft to apply rotational force to the shaft, and viscous grease sealed between the shaft and the movable member. .

The viscous grease is sealed between a pipe provided in a movable member whose rotation is restricted and a shaft inserted into the pipe.

Further, the viscous grease may be sealed between the shaft and the hole wall of the shaft holding hole formed in the moving member.The spring may be a torsion spring, a spiral spring, or a spring.

[Function] Since the present invention is configured as described above, the rotational force of the shaft due to the spring is transmitted to the pinion meshing with the rack. This converts the spring force into a driving force for the movable member, which automatically moves relative to the fixed member. During this movement, the high-speed rotation of the shaft is suppressed by the shear resistance of the viscous grease, so that the moving member moves at a slow speed.

In addition, by applying an external force to move the moving member in the opposite direction to the direction of movement of the spring force described above, the shaft is rotated in the opposite direction to the above through the rack and pinion, and driving energy is stored in the spring. .

[Examples] The present invention will be specifically described below based on illustrated examples.

As shown in FIG. 7, this embodiment uses an article storage device 30 (for example, an accessory case) in which an inner case (movable member) 10 that accommodates articles moves relative to an outer case (fixed member) 20. This is a moving device.

In the article storage device 30, the inner case 10 is inserted into the outer case 20 so as to be freely retractable, and after storing the articles in the inner case 10, the articles can be stored by sinking the inner case 10 into the case 2o. It is now possible to do so.

The slowing device of the present invention will be explained based on the embodiment shown in FIGS. 1 to 6.

Figure 1 is a plan cross-sectional view of the slowing device, and Figure 2 is II of Figure 1.
-II line sectional view, FIG. 3 shows a sectional view taken along the line ■-■ in FIG. 1, and FIG. 4 shows a view taken along the ■ arrow in FIG.

In the figure, an inner case 10 is inserted into an outer case 20 so as to be freely retractable. The inner case IO is provided with a recess 10a that opens upward from approximately the front end to the vicinity of the rear end of the case, and articles can be stored in the recess 10a.

Further, a through hole 2 is bored in the rear end portion 10b of the inner case l○ so as to traverse the inner case 10, and a mechanism section is attached within this through hole 2. The through hole 2 has a large diameter hole 2a in the center, a small diameter bearing hole 2b communicating with one end of the large diameter hole 2a, and a hexagonal hole 2C communicating with the other end.
It consists of recesses 2d and 2e provided on both sides of the inner case 1o, respectively, so as to communicate with the large diameter hole 2a through the bearing hole 2b and the hexagonal hole 2C. The above large diameter hole 2a
As shown in FIG. 3, the bottom side of the inner case 10 is open.

Then, in the mechanism part, the head part 3a is fitted into the hexagonal hole 2C of the through hole 2 with rotation restrained, and the body part 3b is fitted into the large diameter hole 2a.
A pipe 3 is positioned inside the pipe 3, and the inside of the pipe 3 is passed through, and the shaft part on one end side is placed in the bearing hole 2b of the through hole 2, and the shaft part on the other end side is positioned inside the pipe 3 so as to be freely rotatable. a pinion 5.5 located in the recesses 2d and 2e on both sides of the through hole 2 and attached to both ends of the shaft 4 so as to rotate together with the shaft 4; One end 6a is locked in the provided through hole 4a, and the coil part 6b inserts the pipe 3 and shaft 4, and the other end 6C is locked in the pipe 3, thereby connecting the shaft 4 and the inner case 10. The hook is composed of a screw spring 6 and a screw spring 6 that is passed between the handle and the handle. A viscous grease 7 is sealed between the pipe 3 and the shaft 4 of the mechanism section.

The pipe 3 has a head 3a as shown in Fig. 5 (a) and (b).
is formed in a hexagonal shape, and this head 3a is connected to the through hole 2.
By fitting into the hexagonal hole 2C of the inner case 10, rotation is restrained and attached. Further, a groove 30 is formed in the head 3a of the pipe 3 in the length direction of the pipe.
The other end 6G of the torsion spring 6 is engaged with this groove 3c.

In addition, the shaft 4 has both ends 4b and 4c cut in parallel, as shown in FIGS. 6(a) and 6(b).
By fitting holes of the same shape drilled in the pinion 5 into b and 4c, the shaft 4 and the pinion 5 can rotate together.

On the other hand, racks 8.degree. 8 are fixed to the outer case 20 on both sides of the bottom plate 20a along the moving direction of the inner case 10. The tooth profile and width of the rack 8 are designed so that the pinion 5, which constitutes the mechanical section of the inner case 1o described above, can be engaged with the rack 8.

The slowing device 1 of this embodiment is constructed as described above, and this slowing device 1 operates as follows.

In the state shown in FIG. 1, the screw spring 6 is tightened and energy for urging the shaft 4 to rotate is stored in this spring. In this state, the inner case 10 is locked into the outer case 20 by a suitable locking means (not shown).

When the lock is released, the repulsive force of the screw spring 6 causes the pinion 5 to rotate via the shaft 4, and this rotation of the pinion 5 is converted into a driving force for the inner case 10 through engagement with the rack 8. The inner case 10 automatically advances from inside the outer case 20 in the direction of arrow A. Inner case l at this time
O moves by overcoming the shear resistance of the viscous grease sealed between the pipe 3 and the shaft 4, so it does not move shockingly and moves at a slow speed that provides a good operating feel. Become.

Next, a method for assembling the mechanical parts of the inner case 10 in the above embodiment will be described.

First, after applying viscous grease 7 to the outer circumferential surface of the shaft 4, the torsion spring 6 is inserted onto the shaft 4 and its one end 6a is engaged with the through hole 4a of the shaft 4 to form a subassembly. Thereafter, with the screw spring 6 bent in the longitudinal direction, the shaft 4 is tilted and the other end of the shaft 4 is first inserted into the hexagonal hole 2C of the through hole 2 from the open side of the large diameter hole 2a. Fully pull the shaft 4 toward the other end and place the subassembly inside the through hole 2. Next, return the torsion spring 6 to its free state, pull the shaft 4 toward the one end, and tighten the shaft portion on the one end of the shaft 4. The pipe 3 is supported by the bearing hole 2b of the through hole 2, and the pipe 3 is inserted into the through hole 2 formed in the inner case 10 from the right side in FIG. 1 with the body 3b side at the beginning. By this insertion, the head 3a of the pipe 3 is inserted into the hexagonal hole 2 of the through hole 2.
C, and the other end 6c of the torsion spring 6 is locked in the groove 3C formed in the head 3a. In this way, one end of the shaft 4 is positioned in the bearing hole 2b of the through hole 2, the other end is positioned inside the pipe 3, and the shaft 4 is inserted into the inner case 1.
Rotatably attach to o.

After that, the pinion 5.5 is attached to both ends 4b of the shaft 4,
4c, and the assembly of the mechanism part is completed.

In the above embodiment, the inner case 10 can move outward (in the direction of the arrow A in FIG. 1) relative to the outer case 2o.
By reversing the winding direction of the torsion spring 6, the inner case 10 can be retracted into the outer case 20 (in the direction of arrow B in FIG. 1).

The present invention is not limited to the embodiments described above, and various modifications can be made.

The viscous grease 7 may be sealed between the hole wall of the through hole 2 and the shaft 4 by omitting the pipe 3 described above. In order to do this, the screw spring 6 is set so as to be biased towards one of the side surfaces of the inner case 10, and the large diameter hole 2a of the through hole 2 is made small in diameter to serve as a shaft holding hole. This can be easily done by providing a gap in which the viscous grease 7 is sealed.

Further, a spiral spring or a mainspring spring may be used in place of the torsion spring 6 in the above embodiment. When this spiral spring or mainspring is used, these springs are set to one side on one side of the inner case 10. Therefore, it is advantageous to seal the viscous grease 7 in the gap between the shaft 4 and the hole wall of the shaft holding hole as in the above-mentioned modification.

[Effects of the Invention] As described above, the present invention incorporates a spring that stores movement energy in a movable member that moves relative to a fixed member, and viscous grease that controls the speed of the movable member by this spring to drive the movable member itself. Since the function and the damper function are provided, the entire device can be made compact, and the spring repulsive force can be designed to be sufficiently large so that the speed of the moving member can be kept constant despite changes in the weight of the moving member.

Further, although the present invention utilizes the repulsive force of a spring, it also has a damper function, so that the moving speed of the moving member can be controlled so as to provide an appropriate operational feeling.

Further, according to the present invention, it is possible to obtain a slowing device that has a simple structure, is easy to assemble, and has fewer failures.

[Brief explanation of the drawing]

FIG. 1 is a plan sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, FIG. 3 is a sectional view taken along the line ■-■ in FIG. Figure 1 shows the pipe used in the example above, (A) shows the front view, (B) shows the side view, and Figure 6 shows the shaft used in the example above. ) is a front view thereof, (b) is a side view thereof, and FIG. 7 is a perspective view of a conventional accessory case. l... Slowing device, 2... Through hole, 3... Pipe,
4...Shaft, 5...Pinion, 6...Torsion spring 7...Viscous grease, 8...Rack, 10...
Inner case (moving member), 20... Outer case (fixed member). Patent Applicant NHK Spring Co., Ltd. Agent Patent Attorney Hide Sato Showu 5 Criminals (A) (B) Ryotsu 2 (A) (℃) 1.

Claims (4)

[Claims] (1) A moving member that moves relative to a fixed member, a rack provided on the fixed member, a shaft rotatably attached to the moving member, and a pinion attached to the shaft and meshing with the rack. a spring installed between the moving member and the shaft to apply rotational force to the shaft; and viscous grease sealed between the shaft and the moving member. Device. (2) The slowing device according to claim (1), wherein the viscous grease is sealed between a pipe whose rotation is restricted by the moving member and a shaft inserted into the pipe. (3) The slowing device according to claim (1), wherein the viscous grease is sealed between the shaft and a hole wall of a shaft holding hole formed in the moving member. (4) The slowing device according to claim (1), wherein the spring is a torsion spring, a spiral spring, or a mainspring.