JP2012117563A - Mechanism for restricting movement in one direction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict the movement of a component member in a relative motion only when moving in a specific direction, and to allow a smooth movement without roughness when moving in an opposite direction.SOLUTION: A mechanism for restricting a movement in one direction includes pressing means 6, 9 for pressing a first projection 8 provided at a first member 1b in a relative motion, and the second projection 4 provided at the second member 2 in a relative motion, to the direction opposing to each other. The constitution is made such that the elastic force of the pressing means 6, 9 causes the second projection 4 pass over the first projection 8, and both members 1b, 2 move relatively. The position holding the second projection 4 becomes different when the direction of the relative movement is in one of the direction A and from when in the other of the direction B. By this constitution, the values of elastic forces working on the first and the second 4, 8 are varied.

Description

  The present invention relates to a one-way movement limiting mechanism that gives a large resistance to movement only when the movement direction between moving objects that move relatively is one direction.

A movement limiting mechanism is known that maintains a predetermined position unless an external force of a certain level or more is applied between two members that move relative to each other.
For example, a self-supporting mechanism in a rotary damper described in Patent Document 1 is a movement limiting mechanism for allowing an opened opening / closing lid to stand up without falling down.
Its specific structure is as follows.
A first needle protruding from the outer peripheral surface of the rotating shaft is provided in an axial groove formed on the outer periphery of the rotating shaft of the opening / closing lid, and a slit is provided in a cylindrical outer frame surrounding the rotating shaft. A second needle protruding inward from the inner peripheral surface of the outer frame is provided. The outer frame is provided with spring means for urging the second needle inward.

  In the process of rotating the rotary shaft with respect to the outer frame, when the first needle and the second needle provided on the rotary shaft come into contact with each other, the spring means is rotated against torque caused by elastic force. That is, unless a force that overcomes the torque due to the elastic force is applied, the rotating shaft does not rotate beyond the contact position between the first needle and the second needle. It can be made independent.

Japanese Patent No. 2739164

In the above self-supporting mechanism, when the outer frame and the rotation shaft rotate relative to each other, when the first needle on the rotation shaft side contacts the second needle on the outer frame side, an external force that overcomes the torque generated by the elastic force is applied. Otherwise, the rotating shaft cannot be rotated from that position, but the reason why such an external force is required does not depend on the rotating direction of the rotating shaft. That is, no matter which direction the rotating shaft is rotated, a large force is required at a predetermined position in order to rotate the rotating shaft beyond the position where the first needle and the second needle are in contact with each other. Become.
For example, when the lid is fully opened and stood up, the lid may fall by its own weight beyond the contact position between the first needle and the second needle unless a force in the direction of intentionally closing is applied. Absent.

However, when the lid is opened, as in the case of closing, the contact position between the first needle and the second needle is exceeded, so that a force large enough to overcome the torque by the elastic force is required.
Thus, in the conventional movement restriction mechanism, not only when the lid is closed, but also when the lid is opened, a large force that overcomes the torque generated by the elastic force must be applied at a predetermined position. Actually, it is necessary to prevent the opened lid from being closed on its own, and it is not necessary to provide resistance when opening the lid, but with the conventional restriction mechanism, even if the movement is in a direction that does not need to be restricted, There was a problem that a member such as a lid could not be moved smoothly without a sense of incongruity.

  An object of the present invention is to limit a movement of a relative moving member only when moving in a specific direction, and to allow a smooth movement without a sense of incongruity when moving in the opposite direction. Is to provide.

  The first invention includes a first relative movement member, a second relative movement member that moves relative to the first relative movement member, and first and second relative movement members that are provided on surfaces facing each other. A pressing member that is provided in one or both of the second protruding portion and the first relative moving member or the second relative moving member, and that exerts an elastic force that presses the first protruding portion or the second protruding portion toward the opposite surface. And a first holding position and a second holding position adjacent to each other in the moving direction, and the second projecting portion is movable within the range of the first and second holding positions. And a holding unit for holding.

  According to the first aspect of the present invention, when the moving force for moving the first relative movement member relative to the second relative movement member in one direction is applied, the second protrusion is positioned at the first holding position. While moving over the first protrusion against the elastic force of the pressing means and applying a moving force that moves the first relative moving member relative to the second relative moving member in the other direction, the first The two protrusions move over the first protrusion against the elastic force of the pressing means while being positioned at the second holding position, and the first relative movement member moves relative to the one direction to move the second protrusion. Relative movement of the first relative movement member relative to the other direction rather than the elastic force acting when the part gets over the first protrusion, and the elasticity acting when the second protrusion gets over the first protrusion The feature is that the force is greater.

  The second invention is characterized in that the pressing means comprises at least first pressing means for applying an elastic force to the first protrusion.

  3rd invention presupposes 1st or 2nd invention, and the said press means provided the said 1st press means and the 2nd relative movement member, and 2nd made the spring force smaller than the 1st press means. The second pressing means is characterized in that a spring force is applied to the second protrusion when the second protrusion is in the first holding position.

4th invention presupposes 2nd or 3rd invention, The said 1st protrusion part was integrated with the 1st press means, It is characterized by the above-mentioned.
The relative movement in the above invention includes the case where either the first relative movement member or the second relative movement member moves, but also includes the case where not only one of them but also both move simultaneously. It is.

  In the first to fourth inventions, when the relative movement direction of the second relative movement member with respect to the first relative movement member is one direction, and when the relative movement direction is the other direction, the second protrusion portion changes the first protrusion portion. The structure requires different force when moving over the vehicle. Therefore, when the relative movement direction of the first relative movement member and the second relative movement member is one direction, a force greater than a predetermined force is required to get over the protruding portion, and the inadvertent movement is restricted. However, the movement in the other direction can be performed smoothly without a sense of incongruity. For example, the open / close lid can be opened without resistance, and the lid in all states can be prevented from being closed by its own weight.

In 2nd invention, the elastic force which presses a 1st protrusion part to an opposing surface side can be made to act by a 1st press means.
According to the third aspect of the invention, when the relative movement direction of the first and second relative movement members is one direction and the second protrusion is in the first holding position, the second protrusion has a first pressing force. Since the spring force of the second pressing means having a smaller spring force than the means acts, both the relative movement members can move against the small spring force of the second pressing means.
On the other hand, when the relative movement direction is the other direction, since the large spring force of the first pressing means acts on the first protrusion and the second protrusion, in order to move both the relative movement members, A force that overcomes the spring force of the large first pressing means is required.
That is, the resistance can be changed depending on the relative movement direction.

  In 4th invention, a number of parts can be reduced by integrating a 1st protrusion part and a 1st press means.

FIG. 1 is a side view in which a part of the rotary damper according to the first embodiment is cut away. FIG. 2 is an operation explanatory diagram of the unidirectional movement restriction mechanism of the first embodiment, and shows the case where the relative movement direction is one direction in the order of (a) → (b) → (c) → (d). ing. FIG. 3 is an operation explanatory diagram of the unidirectional movement restriction mechanism of the first embodiment, and shows the case where the relative movement direction is another direction in the order of (a) → (b) → (c) → (d). ing. FIG. 4 is an outer side view (a) and a sectional view (b) of the second embodiment. FIG. 5 is a cross-sectional view of the third embodiment. FIG. 6 is an operation explanatory diagram of the unidirectional movement restriction mechanism of the fourth embodiment, and shows the case of the relative movement direction being one direction in the order of (a) → (b) → (c) → (d). ing. FIG. 7 is an operation explanatory diagram of the unidirectional movement restriction mechanism of the fourth embodiment, and shows the case where the relative movement direction is another direction in the order of (a) → (b) → (c) → (d). ing. FIG. 8 is an operation explanatory diagram of the unidirectional movement restriction mechanism of the fifth embodiment, and shows the case where the relative movement direction is one direction in the order of (a) → (b) → (c) → (d). ing. FIG. 9 is an operation explanatory diagram of the unidirectional movement restriction mechanism of the fifth embodiment, and shows the case where the relative movement direction is another direction in the order of (a) → (b) → (c) → (d). ing. 10A and 10B are operation explanatory views of the unidirectional movement limiting mechanism of the sixth embodiment. FIG. 10A is a plan view in which the first relative movement member is omitted, and FIG. Shows the direction case 11A and 11B are operation explanatory views of the unidirectional movement limiting mechanism of the sixth embodiment, wherein a) is a plan view in which the first relative movement member is omitted, and FIG. 11B is a cross-sectional view in which the relative movement direction is the other direction. Shows the case. FIG. 12 is a diagram for explaining the operation of the unidirectional movement restriction mechanism of the seventh embodiment, and shows the case where the relative movement direction is one direction in the order of (a) → (b) → (c) → (d). ing. FIG. 13 is a diagram for explaining the operation of the unidirectional movement restriction mechanism of the seventh embodiment, and shows the case where the relative movement direction is another direction in the order of (a) → (b) → (c) → (d). ing. FIG. 14 is a cross-sectional view of the eighth embodiment. FIG. 15 is a cross-sectional view of the ninth embodiment.

In the first embodiment of the present invention shown in FIGS. 1 to 3, a one-way movement restriction mechanism is provided on a rotary damper in which a shaft member 2 is rotatably inserted into a cylindrical casing 1. A damper mechanism for applying a braking force to relative rotation with the shaft member 2 is incorporated in the damper portion 1 a of the casing 1. This damper mechanism may be any mechanism such as one utilizing a fluid viscous resistance. Further, the damper portion 1a incorporating the damper mechanism is not essential and is not directly related to the one-way movement restriction mechanism of the present invention, so that the description thereof is omitted here.
The unidirectional restriction mechanism of the first embodiment is a notched portion in FIG. 1, and restricts movement according to the rotation direction when the cylindrical part 1 b protruding from the damper part 1 a and the shaft member 2 are relatively rotated. Or not.

In the first embodiment, the shaft member 2 that is the second relative movement member is provided in the cylindrical portion 1b that is the first relative movement member of the present invention while maintaining a predetermined interval.
A pair of holding portions 3 each including an axial groove are formed on the outer periphery of the shaft member 2 at a position rotated by 180 °. Each of the holding portions 3 incorporates a roller member 4, and the roller member 4 is attached to the shaft. The roller member 4 is protruded from the outer peripheral surface of the member 2 toward the cylindrical portion 1b, and the second protruding portion of the present invention is configured.
The holding portion 3 includes a first holding position 3a and a second holding position 3b that are adjacent to each other in the circumferential direction of the shaft member 2, and the depth of the first holding position 3a is greater than that of the second holding position 3b. Is also deep.

  A spring holding hole 5 that penetrates the shaft member 2 is formed on the bottom surface of the first holding position 3 a of the holding portion 3, and a coil spring 6 is inserted into the spring holding hole 5. The coil spring 6 functions as a second pressing means of the present invention in which both ends thereof are in contact with the roller member 4 in the holding portion 3 and exert a spring force that presses the roller member 4 toward the cylindrical portion 1b. .

On the other hand, in the cylindrical portion 1b, a pair of slits 7 and 7 extending in the axial direction are formed at positions rotated by 180 ° in a portion corresponding to the holding portion 3 of the shaft member 2, and each slit 7 has a diameter direction. The roller member 8 which can move is accommodated, and this roller member 8 constitutes the first protrusion of the present invention.
Further, the outer periphery of the cylindrical portion 1b is covered with a ring spring 9, which is the first pressing means of the present invention, and an elastic force toward the shaft member 2 is applied to the roller member 8 at the position of the slit 7. I am doing so. In addition, the code | symbol 10 in FIG. 2 is a stopper part for controlling rotation of the said ring spring 9. In FIG.
Note that the spring force of the ring spring 9 as the first pressing means is set to be overwhelmingly larger than the spring force of the coil spring 6 as the second pressing means.
Moreover, in FIG. 1, the code | symbol 11 is a screw member for fixing the cylinder part 1b to the said damper part 1a.

Next, the operation of the unidirectional movement limiting mechanism of the first embodiment will be described.
FIG. 2 is an operation explanatory diagram when the shaft member 2 is rotated in the direction of arrow A with respect to the cylindrical portion 1b. FIG. 3 is a diagram of the shaft member 2 rotated in the direction of arrow B opposite to the arrow A. It is operation | movement explanatory drawing at the time.

  When the shaft member 2 is rotated in the direction of arrow A from the state of FIG. 2A, the roller member 4 positioned at the second holding position 3 b of the holding portion 3 is moved to the cylindrical portion 1 b by the weak spring force of the coil spring 6. The roller member 4 on the shaft member side contacts the roller member 8 on the casing side as shown in FIG. 2B. When the roller member 4 is in contact with the roller member 8 and the shaft member 2 rotates in the direction of arrow A, the roller member 4 moves in the holding portion 3 from the second holding position 3b in the circumferential direction. 1 Move to the holding position 3a side.

Further, when a rotational force in the direction of arrow A is applied to the shaft member 2, the roller member 4 deflects the coil spring 6 at the first holding position 3 a and moves to the center side of the shaft member 2, and is the same as the roller member 8. It arranges on a diameter (refer FIG.2 (c)).
If a rotational force in the direction of arrow A is further applied to the shaft member 2 from FIG. 2C, the roller member 4 gets over the roller member 8 and the shaft member 2 rotates as shown in FIG. 2D.
At this time, the roller member 4 is kept pressed by the coil spring 6 and lightly pressed against the inner periphery of the cylindrical portion 1b at the first position holding position 3a.

  In the state of FIG. 2C, the elastic force of the coil spring 6 and the ring spring 9 is acting on the roller member 4 and the roller member 8, but the spring force of the coil spring 6 is applied to the ring spring 9. Since it is overwhelmingly smaller than the spring force, it is sufficient to bend the coil spring 6 having a small spring force when the roller member 4 gets over the roller member 8. That is, when the shaft member 2 is rotated in the direction of arrow A, it can be smoothly rotated without requiring a large rotational force.

On the other hand, FIG. 3 shows a state where the shaft member 2 is rotated in the arrow B direction from the state of FIG.
For example, when the shaft member 2 is rotated in the direction of arrow A and the shaft member 2 is rotated in the direction of arrow B from the state of FIG. It rolls between the shaft member 2 and the cylindrical part 1b and moves from the first holding position 3a to the second holding position 3b as shown in FIG.
When the shaft member 2 is rotated in the arrow B direction from the state of FIG. 3A, the roller member 4 on the shaft member 2 side contacts the roller member 8 on the casing side as shown in FIG. 3B. When the shaft member 2 rotates in the arrow B direction while the roller member 4 is in contact with the roller member 8, the roller member 4 located at the second holding position 3b cannot move in the center side direction of the shaft member 2. Therefore, as shown in FIG. 3 (c), the roller member 8 on the cylindrical portion 1b side is pressed outward. When the pressing force of the roller member 4 overcomes the elastic force of the ring spring 9 that presses the roller member 8, the roller member 8 moves outward from the cylindrical portion 1b, and as shown in FIG. After the member 4 and the member 8 are aligned on the same diameter, the roller member 4 gets over the roller member 8 and rotates to the state shown in FIG.

Thus, when the shaft member 2 is rotated in the direction of arrow B, the roller member 4 rotates over the roller member 8 from the state shown in FIG. 3B and rotates against the large elastic force of the ring spring 9. It is necessary to apply force.
Here, when the shaft member 2 is rotated in the arrow B direction from the state of FIG. 2D, the roller member 4 rolls and moves from the first holding position 3a to the second holding position 3b (FIG. 3 ( a) see) The case is explained, but when the spring force of the coil spring 6 is very small and the frictional force between the roller member 4 and the cylindrical portion 1b is small, the roller member 4 does not roll. In some cases, the first holding position 3a may remain.
Even in this case, if the shaft member 2 rotates in the direction of the arrow B and the roller member 4 and the member 8 come into contact with each other as shown in FIG. 3B, the roller member 4 is in the second holding position 3b. After moving to, the roller member 8 is overcome.

In the first embodiment, when the shaft member 2 is rotated in the direction of arrow A, the roller member 4 on the shaft member side passes over the roller member on the casing side, and thus a particularly large rotational force is not required and smooth. Although rotation is possible, when the roller member 4 is rotated in the direction of arrow B, a large rotational force is required in the process in which the roller member 4 gets over the roller member 8.
That is, the force required to get over the roller member varies depending on the rotation direction of the shaft member.

For example, when an opening / closing lid is connected to the shaft member 2 and the cylinder portion 1b is connected to the main body, if the lid is opened by rotation in the direction of the arrow A, the roller member 4 is not particularly uncomfortable when opening, and the roller member 4 becomes the roller member 8 However, when the shaft member 2 rotates in the B direction in which the lid closes, a force that overcomes the elastic force of the ring spring 9 must be applied. You won't get over the lid by its own weight.
The arrow A direction is one direction of the present invention, and the arrow B direction is the other direction of the present invention.

Moreover, in this 1st Embodiment, although the 1st, 2nd protrusion part is comprised by the roller members 8 and 4, a 1st, 2nd protrusion part is not restricted to a roller member.
As long as the second protrusion is configured to be positioned at the first holding position or the second holding position in the holding portion according to the moving direction of the relative movement member, the protrusion may be configured by any member. .

The second embodiment shown in FIG. 4 is a unidirectional movement limiting mechanism that differs from the first embodiment in that a coil spring 12 is wound around the outer periphery of the cylindrical portion 1b instead of the ring spring 9.
The same reference numerals as those in FIGS. 1 and 2 are used for the same constituent elements as those in the first embodiment, and description of the individual elements is omitted.
In this 2nd Embodiment, the clamping force of the coil spring 12 wound around the cylinder part 1b functions as a spring force of the press means which presses the roller member 8 which is a 1st protrusion part to the shaft member 2 direction. The spring force in the tightening direction of the coil spring 12 is sufficiently larger than the spring force of the coil spring 6 on the shaft member side which is the second pressing means.

  Also in the second embodiment, the direction in which the shaft member 2 is rotated in the direction of arrow A is one direction of the present invention. At this time, the roller member 4 is positioned at the first holding position 3a of the holding portion 3. Then, the coil spring 6 is lightly bent to rotate over the roller member 8 on the cylindrical portion 1b side (see FIG. 2).

On the other hand, the direction in which the shaft member 2 is rotated in the direction of arrow B is the other direction of the present invention, and the roller member 4 positioned at the second holding position 3b of the holding portion 3 is rotated by the coil spring 12 via the roller member 8. If is not spread out, the roller member 8 cannot be overcome and the movement is restricted (see FIG. 3).
Thus, also in 2nd Embodiment, the rotation can be restrict | limited by the relative rotation direction of the cylinder part 1b and the shaft member 2. FIG.

The third embodiment shown in FIG. 5 is that the ring spring 13 provided on the outer periphery of the cylindrical portion 1b is bent to form the first protruding portion 13a protruding from the slit 7 formed in the cylindrical portion 1b. Although different from the first embodiment, other configurations are the same as those of the first embodiment. The same reference numerals as those in the first embodiment are used for the same components as those in the first embodiment.
The third embodiment is characterized in that the ring spring 13 which is the first pressing means of the present invention is integrated with the first protruding portion 13a, and the first pressing means as in the first embodiment. In addition, the number of parts can be reduced and the assembly process can be simplified as compared with the case where the roller member 8 which is the first protrusion is used.
Also in this case, the spring force of the ring spring 13 is sufficiently larger than the spring force of the ring spring 6 as the second pressing means.

However, the operation as the one-way movement restriction mechanism is the same as that of the first embodiment.
That is, the direction in which the shaft member 2 is rotated in the direction of arrow A is one direction of the present invention, and the roller member 4 rotates slightly over the protruding portion 13a (see FIG. 2).
On the other hand, the direction in which the shaft member 2 is rotated in the direction of arrow B is the other direction of the present invention, and the roller member 4 positioned at the second holding position 3b is against the spring force of the ring spring 13 described above. If the protrusion 13a is not moved outward, the protrusion 13a cannot be overcome and rotated (see FIG. 3).
Thus, also in 3rd Embodiment, the rotation can be restrict | limited by the relative rotation direction of the cylinder part 1b and the shaft member 2. FIG.

The fourth embodiment shown in FIGS. 6 and 7 is a one-way movement restriction mechanism in which the shaft member 2 is a first relative movement member and the cylindrical portion 1b is a second relative movement member. And the same code | symbol as 1st Embodiment is used for the component which has the function similar to 1st Embodiment.
In the fourth embodiment, a spring holding hole 14 is formed in the shaft member 2 and a coil spring 15 as a first pressing means is incorporated, and holding grooves 16 are formed at both ends thereof, and the first projecting portion is provided there. The roller member 8 is provided.

On the other hand, a pair of spring holding holes 5 is formed at a position rotated 180 ° of the cylindrical portion 1b, and a coil spring 6 as a second pressing means is provided in the spring holding hole 5. Note that the spring force of the coil spring 6 as the second pressing means is overwhelmingly smaller than the spring force of the coil spring 15 as the first pressing means.
Moreover, the holding part 3 holding the roller member 4 which is a 2nd protrusion part is formed in opening of the spring holding hole 5 of the cylinder part 1b. The holding portion 3 has a first holding position 3a positioned on the same diameter as the spring holding hole 5 by increasing the depth from the inner peripheral surface of the cylindrical portion 1b, and the first holding position 3a. 2nd holding position 3b which adjoined and made shallow the depth from the internal peripheral surface of the cylinder part 1b is provided.

In the unidirectional movement limiting mechanism of the fourth embodiment, the roller member 4 is pushed by the coil spring 6 and is positioned at the second holding position 3b in the state of FIG. From the state of FIG. 6A, the shaft member 2 rotates in the direction of arrow A, and the roller member 8 on the shaft member 2 side rotates the roller member 4 on the cylindrical portion 1b side as shown in FIG. 6B. When pushed in the direction, the roller member 4 moves to the first holding position 3a side of the holding portion 3. Further, when a rotational force in the direction of arrow A is applied to the shaft member 2, the coil spring 6 on the cylindrical portion 1b side is bent as shown in FIG. 6C, so that the roller member 4 moves outward from the inner peripheral surface of the cylindrical portion 1b. Move to. Thereby, the roller member 4 which is a 2nd protrusion part gets over the roller member 8 which is a 1st protrusion part, and will be in the state of FIG.6 (d). In this state, the roller member 4 is again pushed by the coil spring 6 and moves to the second holding position 3b side.
The coil spring 6 bent in FIG. 6 (c) has a small spring force, so that the relative rotation in which the shaft member 2 rotates in the direction of the arrow A with respect to the cylindrical portion 1b hardly gives resistance or a sense of incongruity. .

On the other hand, when the shaft member 2 rotates in the direction of arrow B, the roller member 4 is pushed by the coil spring 6 and is positioned at the second holding position 3b, as in FIG. When the shaft member 2 rotates from the state of a) and the shaft member 2 rotates to the state of FIG. 7B, the roller member 8 contacts the roller member 4. 7B, the roller member 8 pushes the roller member 4 in the circumferential direction, so that the roller member 4 maintains the second holding position 3b in the holding portion 3.
In this state, when a rotational force in the direction of arrow B is further applied to the shaft member 2, the roller member 4 is in the second holding position 3b and cannot move outward from the cylindrical portion 1b. As shown in (c), the coil spring 15 as the second pressing means is bent and the roller member 8 moves to the center side of the shaft member 2. As a result, the roller member 4 gets over the roller member 8 and rotates to FIG.

The coil spring 15 that is bent in FIG. 7C has a larger spring force than the coil spring 6 that is the second pressing means. Therefore, in order for the cylindrical portion 1b and the shaft member 2 to rotate relative to the spring force of the coil spring 15, it is necessary to apply a large rotational force, and the spring force is inadvertent in the direction of arrow B. It will limit the rotation.
Thus, also in 4th Embodiment, the rotation can be restrict | limited by the relative rotation direction of the cylinder part 1b and the shaft member 2. FIG.

The fifth embodiment shown in FIGS. 8 and 9 is different from the first embodiment in that the shaft member 2 is not provided with the coil spring 6 as the second pressing means. Other configurations are the same as those of the first embodiment, and the same reference numerals are used for the same components as those of the first embodiment.
In the fifth embodiment, the state when the shaft member 2 rotates in the direction of the arrow A, that is, when it moves in one direction of the present invention is shown in FIGS. 8 (a), 8 (b), 8 (c), 8 (d). 9A and 9B show the case of rotating in the direction of the arrow B, that is, the case of moving in the other direction of the present invention.

  As shown in FIG. 8A, when the roller member 4 that is the second protrusion is located at the second holding position 3b and the shaft member 2 is rotated in the direction of the arrow A, the roller member 4 becomes the shaft. The roller member 4 moves together with the member 2, abuts against the roller member 8 that is the first protrusion, and is pressed against the roller member 8, so that the roller member 4 is held in the first holding portion 3 as shown in FIG. Move to position 3a. When the roller member 4 moves to the first holding position 3a, the amount of protrusion from the outer peripheral surface of the shaft member 2 decreases. When a rotational force in the direction of arrow A is further applied in this state, as shown in FIG. 8C, the ring spring 9 is slightly bent, and the roller member 4 as the second protrusion is the first protrusion. The roller member 8 gets over and rotates. Although the spring force of the ring spring 9 is large, if it bends only slightly, only a small elastic force acts. Therefore, even if the ring spring 9 is bent in the state of FIG. The resistance by is small, and the rotation of the shaft member 2 is not limited.

  When the roller member 4 gets over the roller member 8 from the state shown in FIG. 8C, the circumferential force by the roller member 8 acts. As shown in FIG. 8D, the roller member 4 is located at the first holding position 3a. However, after that, whether the roller member 4 stays at the first holding position 3a or moves to the second holding position 3b may be either due to the friction of the sliding surface or the influence of the rotational force.

  In the above description, the roller member 4 positioned at the second holding position 3b is pressed by the roller member 8 in the state shown in FIG. Although the case of moving to the position 3a has been described, the roller member 4 may be positioned at the first holding position 3a in the same rotational state as in FIG. As described above, when the roller member 4 has been positioned at the first holding position 3a before contacting the roller member 8, the roller is kept in the first holding position 3a after the contact with the roller member 8. The member 4 gets over the roller member 8. Therefore, also in this case, the roller member 4 can easily get over the roller member 8, and the relative rotation is not limited.

Moreover, the case where the shaft member 2 is rotated in the arrow B direction will be described with reference to FIG.
As shown in FIG. 9A, when the roller member 4 is in the first holding position 3a and the shaft member 2 is rotated in the arrow B direction, the member 4 moves together with the shaft member 2 rotating in the arrow B direction. 9B, the roller member 4 comes into contact with the roller member 8. As shown in FIG. Further, when a rotational force in the direction of arrow B is applied to the shaft member 2, the roller member 4 is pressed against the roller member 8, and the roller member 4 is pressed by the circumferential force by the roller member 8 as shown in FIG. Moves to the second holding position 3b side in the holding portion 3, and the protruding amount from the outer peripheral surface of the shaft member 2 becomes larger than that in FIG. 9B.

  If a rotational force in the direction of arrow B is further applied in this state, as shown in FIG. 9 (d), the ring spring 9 is greatly deflected and the roller member 8 moves outward from the cylindrical portion 1b. The roller member 4 that is the two projecting portions rotates over the roller member 8 that is the first projecting portion, and the state shown in FIGS. 8A and 9A is obtained. When the ring spring 9 bends greatly as shown in FIG. 9D, a large spring force acts as an elastic force that presses the shaft member 2 via the roller members 8 and 4. Will be limited.

  In the above description, the roller member 4 positioned at the first holding position 3a is pressed by the roller member 8 in the state shown in FIG. Although the case of moving to the position 3b is described, in the same rotation state as in FIG. 9A, if no force is applied to the roller member 4, the roller member 4 is positioned at the second holding position 3b. Sometimes. In this way, when the roller member 4 has been positioned at the second holding position 3b before contacting the roller member 8, the roller holding state 3b is maintained even after the contact with the roller member 8, and the roller The member 4 gets over the roller member 8. Therefore, also in this case, when the roller member 4 gets over the roller member 8, a large force is required, and the relative rotation is limited.

  In the fifth embodiment, the pressing means for the first and second projecting portions is only the ring spring 9 that is the first pressing means, but the amount of deflection depends on the relative rotational direction of the cylindrical portion 1b and the shaft member 2. Therefore, the magnitude of the acting elastic force is different, and the movement can be restricted or not depending on the rotation direction.

  In the sixth embodiment shown in FIGS. 10 and 11, the rotation between the cylindrical member 17 that is the second relative movement member and the rotating body 18 that is the first relative movement member that rotates relative to each other is limited according to the rotation direction. A one-way movement restriction mechanism is provided on the inner bottom surface of the cylindrical member 17. And the said cylindrical member 17 which is a 2nd relative displacement member is provided with the same coil spring 6, the roller member 4, and the holding | maintenance part 3 as what was provided in the shaft member 2 of 1st Embodiment, and a 1st relative displacement member On the bottom surface of the rotating body 18, the coil spring 15, the roller member 8, and the holding groove 16 provided in the cylindrical portion 1 b of the fourth embodiment are provided.

In the sixth embodiment, the same reference numerals as those in the first and fourth embodiments are used for the same constituent elements as those in the first and fourth embodiments. And the point which made the spring force of the said coil spring 6 smaller than the spring force of the said coil spring 15 is the same as said other embodiment.
FIGS. 10A and 11A are plan views in a state where the rotating body 18 is removed from the cylindrical member 17, and FIGS. 10B and 11B are rotated by the cylindrical member 17. It is an axial sectional view in the state where body 18 was assembled.

Further, the holding portion 3 of the roller member 4 provided on the inner bottom surface of the cylindrical member 17 is formed of a linear groove toward the center, and includes a first holding position 3a and a second holding position 3b that are adjacent to each other.
The first holding position 3a is a groove whose depth from the inner bottom surface of the cylindrical member 17 is deeper than that of the second holding position, and a coil spring 6 is incorporated in the spring holding hole 5 formed on the bottom surface. The roller member 4 exhibits an elastic force such that the roller member 4 is in light contact with the bottom surface of the rotating body 18.
A holding groove 16 is formed on the bottom surface of the rotating body 18 at a position corresponding to the holding portion 3, the roller member 8 is held by the holding groove 16, and a spring holding hole 14 is formed in the axial direction. The coil spring 15 is accommodated in the spring holding hole 14.

  In the sixth embodiment, when the rotating body 18 is rotated in the direction of arrow A in FIG. 10A, the roller member 8 indicated by a two-dot chain line moves as indicated by arrow A, and the roller member 4 is moved to the holding portion 3. It is located at the first holding position 3a. In this state, when the roller member 4 on the cylindrical member 17 side gets over the roller member 8, the coil spring 6 having a weak spring force is bent as shown in FIG.

On the other hand, when the rotating body 18 is rotated in the direction of arrow B in FIG. 11, in the state of FIG. 11A, the roller member 4 on the cylindrical member 17 side is pushed by the coil spring 6 and the second holding position of the holding portion 3. Located at 3b. When the rotating body 18 is rotated in the arrow B direction in this state, the roller member 8 indicated by a two-dot chain line moves as indicated by the arrow B, and the roller member 4 is positioned at the second holding position 3b of the holding portion 3. In this state, when the roller member 4 on the cylindrical member 17 side gets over the roller member 8, as shown in FIG. 11B, the coil spring 15 having the larger spring force is bent. That is, unless a rotational force that overcomes the elastic force of the coil spring 15 is applied, the relative rotation between the cylindrical member 17 and the rotating body 18 is limited.
Thus, also in 6th Embodiment, the rotation can be restrict | limited by the relative rotation direction of the cylindrical member 17 and the rotary body 18. FIG.

The seventh embodiment shown in FIGS. 12 and 13 is a first slide member 19 that is a first relative movement member, and a second relative movement member that is linearly slidable with respect to the first slide member 19. It is a one-way movement restriction mechanism that restricts relative movement with the slide member 20 according to the movement direction.
And the coil spring 15 which is a 1st press means is accommodated in the surface facing the 2nd slide member 20 in the said 1st slide member 19 similarly to the rotating member 18 of 6th Embodiment shown to FIG. A spring holding hole 14 for holding and a holding groove 16 for holding the roller member 8 as the first projecting portion are provided.

Further, on the surface of the second slide member 20 that faces the first slide member 19, the spring holding hole 5 that houses the coil spring 6 that is the second pressing means, similarly to the cylindrical member 17 of the sixth embodiment, A holding portion 3 that holds the roller member 4 that is the second protruding portion is provided.
In the seventh embodiment, the same reference numerals as those in the sixth embodiment are used for the same constituent elements as those in the sixth embodiment.

  In the seventh embodiment, when the second slide member 20 is moved from the state of FIG. 12A in the direction of arrow A, the roller member 4 comes into contact with the roller member 8 in FIG. In the process from getting over the roller member 8 to the state shown in FIG. 12D, the roller member 4 is positioned at the first holding position 3a as shown in FIG. Is bent over the roller member 8 by bending the small coil spring 6.

On the other hand, when the second slide member 20 is moved in the direction of arrow B in FIG. 13, the roller member 4 pushed by the roller member 8 is held in the second position as shown in FIGS. 13 (b) and 13 (c). The roller member 8 is moved over while remaining in the position 3b. As shown in FIG. 13C, when the roller member 4 gets over the roller member 8, the coil spring 15 on the first slide member 19 side is bent. The coil spring 15 is a spring having a large spring force, and a large external force is required to bend it.
That is, in order to move the second slide member 20 in the arrow B direction and get over the roller member 8, a large force is required, and the relative movement in this direction is limited.
Thus, also in the seventh embodiment, the movement can be restricted or not depending on the relative movement direction of the first slide member 19 and the second slide member 20.

As in the seventh embodiment, a mechanism that restricts movement between relative moving members that linearly move can be used for a sliding door or the like. For example, in order to prevent a sliding door that can be easily opened without restriction from being inadvertently closed, or to prevent a sliding door that can be easily closed from being opened easily, A one-way relative movement limiting mechanism can be used.
Further, the moving direction of the first and second slide members 19 and 20 is not limited to the horizontal direction, and may be any direction such as the vertical direction.

In the eighth embodiment shown in FIG. 14, except that the roller member 4 as the second protruding portion is provided at four positions rotated by 90 ° on the outer periphery of the shaft member 2 as the second relative movement member. The same as in the first embodiment. Therefore, in the eighth embodiment as well, the same reference numerals as those in the first embodiment are used for components having the same functions as in the first embodiment.
Also in the eighth embodiment, when the shaft member 2 is rotated in the direction of the arrow A, the roller member 4 is positioned at the first holding position 3a of the holding portion 3, and the coil spring 6 is a second pressing means having a small spring force. And the roller member 8 can be overcome. Therefore, no limitation is imposed when the shaft member 2 rotates in the direction of arrow A. This operation is the same as that of the second embodiment shown in FIG.

On the contrary, when the shaft member 2 rotates in the direction of arrow B, the roller member 4 is located at the second holding position 3b of the holding portion 3 as in the first embodiment shown in FIG. When 4 passes over the roller member 8, the coil spring 6 does not bend. Therefore, in order for the roller member 4 to get over the roller member 8 and relatively rotate, it is necessary to bend the ring spring 9 having a large spring force, which limits the rotation.
Thus, also in 8th Embodiment, the rotation can be restrict | limited by the relative rotation direction of the cylinder part 1b and the shaft member 2. FIG.

However, in the eighth embodiment, the roller member 4 is provided at a position rotated by 90 °, and the roller member 8 is provided at a position rotated by 180 °. Therefore, every time the rotary shaft 2 rotates by 90 °. The roller member 4 gets over the roller member 8. Therefore, when the shaft member 2 is rotated in the direction of arrow B, the rotation can be limited every time the shaft member 2 is rotated by 90 °.
In this embodiment, four roller members 4 are used to limit the relative rotation to four times. However, the number of the roller members 4 is not limited to four. Also, the timing for limiting the relative rotation can be increased or decreased by changing the arrangement or number of the roller members 8.

The ninth embodiment shown in FIG. 15 is the same as the first embodiment except that the cylindrical member 1b, which is a first relative rotation member, is provided with four roller members 8 serving as first protrusions. Therefore, in the ninth embodiment, the same reference numerals as those in the first embodiment are used for components having the same functions as those in the first embodiment.
Also in the ninth embodiment, when the shaft member 2 is rotated in the direction of arrow A, the roller member 4 is positioned at the first holding position 3a of the holding portion 3 as in the first embodiment shown in FIG. Thus, the coil spring 6 can be bent to get over the roller member 8. Therefore, the rotation in the direction of arrow A is not limited, and smooth rotation is possible.

On the other hand, when the shaft member 2 is rotated in the direction of the arrow B, the roller member 4 is located at the second holding position 3b of the holding portion 3 as in the first embodiment shown in FIG. Instead, the ring spring 9 with increased spring force must be bent to overcome the roller member 8. Therefore, when the shaft member 2 rotates in the direction of arrow B, when the roller member 4 gets over the roller member 8, a force that overcomes the large spring force of the ring spring 9 must be applied, and the rotation is limited. Will be.
In the ninth embodiment, the number of the roller members 8 that are the first protrusions is increased, and the timing at which the roller member 4 gets over it, that is, the timing for limiting the rotation in the direction of the arrow B is increased. The number is not particularly limited.

The number and arrangement of the first protrusions and the second protrusions are not limited to the above embodiment, but the timing for limiting the relative movement can be set by the number and arrangement.
In the above embodiment, the case where the second relative movement member moves relative to the first relative movement member has been described as an example. However, the unidirectional movement restriction mechanism of the present invention has the first and second relative movements. It is provided between the moving members, and there is no restriction when the moving direction is one, and the movement is restricted when the moving direction is the other, and either of the first and second relative moving members moves. Alternatively, both members may move simultaneously.

  The present invention can be applied to a case where the open / close lid can be opened to maintain an upright state, or the opened door is not carelessly closed or the closed door is not carelessly opened.

1b Tube part 2 Shaft member 3 Holding part 3a First holding position 3b Second holding position 4 Roller member 6 (second projecting part) Coil spring 8 (First projecting part) Roller member 9 (first pressing means) ring spring 12 (first pressing means) coil spring 13 (first pressing means) ring spring 13a (first) protrusion 15 (first pressing means) ) Coil spring 17 (second relative movement member) cylindrical member 18 (first relative movement member) rotator 19 (first relative movement member) first slide member 20 (second relative movement member) ) Second slide member

Claims (4)

  A first relative movement member, a second relative movement member that moves relative to the first relative movement member, first and second protrusions provided on surfaces facing each other on the first and second relative movement members, A pressing means provided on either one or both of the first relative moving member and the second relative moving member, for applying an elastic force for pressing the first projecting portion or the second projecting portion toward the opposing surface; and the second A first holding position and a second holding position which are provided on the relative movement member and are adjacent to each other in the moving direction, and a holding portion which holds the second projecting portion movably within the range of the first and second holding positions; And when the moving force for moving the first relative movement member relative to the second relative movement member in one direction is applied, the second protrusion is positioned at the first holding position while the pressing means Overcoming the first protrusion against the elastic force, When a moving force that moves the first relative moving member relative to the second relative moving member in the other direction is applied, the second protruding portion is positioned at the second holding position and resists the elastic force of the pressing means. Over the first protrusion, and the first relative movement member moves relatively in the one direction, and the first relative movement is greater than the elastic force acting when the second protrusion moves over the first protrusion. A one-way movement limiting mechanism configured such that an elastic force acting when the moving member relatively moves in the other direction and the second protruding portion gets over the first protruding portion is increased.   The one-way movement limiting mechanism according to claim 1, wherein the pressing unit includes at least a first pressing unit that applies an elastic force to the first protrusion.   The pressing means includes the first pressing means and a second pressing means provided on the second relative movement member and having a spring force smaller than that of the first pressing means. The second pressing means includes a second protrusion. The one-way movement restriction mechanism according to claim 1 or 2, wherein a spring force is applied to the second protrusion when the is in the first holding position.   The unidirectional movement restriction mechanism according to claim 2 or 3, wherein the first protrusion is integrated with the first pressing means.

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