JP2016199068A - Turning member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a turning member having two members turnably connected to each other, which comprises a lock mechanism which can regulate turning in two directions with a turning shaft as a center and can be easily released.SOLUTION: The turning member has: a first member 2 and a second member 3 which are connected to each other so as to turn with each other with a turning shaft as a center and separate from each other; an engagement protruding part 52 which is joined to the first member 2 to be able to advance and retreat in an advance and retreat direction A1 crossing the turning shaft; and an engagement recessed part 55 which is provided in the second member 3 as a receiving part which the engagement protruding part 52 can enter along the advance and retreat direction A1 in a state where a turning angle between the first member 2 and the second member 3 is within a target angle. The engagement protruding part 52 entering the engagement recessed part 55 can be gotten out from the engagement recessed part 55 by being applied with force by which the first member 2 and the second member 3 are separated from each other.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a rotating member, and more particularly to a rotating member that can be used to configure a table or the like provided in a vehicle seat.

  A folding structure is known in which two members such as a hinge or the like are rotatably connected between two members, such as between a support arm and a plate, for example, a vehicle seat such as an automobile or a railway vehicle. It is used as a table attached to. In this type of folding structure, the purpose is to keep the folded state connected to the hinges etc. against the force of gravity, as in the use of a table, and to adjust the angle at the time of deployment. A locking mechanism is provided. This type of locking mechanism is disclosed in Patent Document 1, for example.

JP 2002-154362 A

  In the folding structure in which the two members as described above are rotatably connected by a hinge or the like, when the lock mechanism for maintaining the rotation angle is provided, the rotation between the two members is performed. Even if it can be restricted by the action of the lock mechanism in one direction, the rotation in the opposite direction cannot be sufficiently restricted in many cases. For example, in the case of a table provided on a vehicle seat, a force is applied to the table surface from below even if the table surface is regulated so as not to hang down due to gravity in a state where the table surface is expanded substantially horizontally. The table surface can be easily rotated upward. Such a situation occurs, for example, when an occupant sitting on the seat kicks the table surface from below. When a lock mechanism that restricts rotation in two directions is provided, the lock mechanism tends to be complicated, and the lock cannot be easily released when the table is folded.

  The problem to be solved by the present invention is that a rotation member in which two members are rotatably connected can be controlled to rotate in two directions around a rotation axis and can be easily released. An object of the present invention is to provide a rotating member provided with a lock mechanism that can be used.

  In order to solve the above-described problem, a rotating member according to the present invention includes a first member and a second member that are connected to each other so as to be rotatable about a rotating shaft and to be separated from each other, and the rotating shaft. In the state where the engagement convex portion coupled to the first member so as to be capable of advancing and retreating in the advancing and retreating direction, and the rotation angle between the first member and the second member are at a target angle, the engagement convex portion Engaging recesses provided in the second member as receiving portions that can enter along the advancing and retreating direction, and the engaging protrusions that have entered the engaging recesses are the first member and The gist is that the second member is escaped from the engagement recess by applying a force to separate the second members from each other.

  Here, it is preferable that one of the engagement convex portion and the engagement concave portion is provided with a first magnet, and the other is provided with a second magnet or metal attracted by the first magnet. .

  Moreover, it is good for one of said 1st member and said 2nd member to be supported by the support shaft different from the said rotating shaft so that rotation in a gravity direction surface is possible.

  The rotating member may constitute a table provided in the vehicle seat, and at least one of the first member and the second member may be a table surface.

  In the rotating member according to the above-described invention, the engagement convex portion provided on the first member is formed on the rotating shaft between the first member and the second member in a state where the rotation angle is at the specific target angle. It penetrates into the engagement recessed part provided in the 2nd member along the advancing / retreating direction which cross | intersects. When the first member or the second member tries to rotate in any direction with respect to the rotation axis from the target angle, the rotation is regulated by the contact of the engaging convex portion and the engaging concave portion, The locking mechanism is activated. On the other hand, the first member and the second member are connected so as to be separable from each other. By applying a force for separating the first member and the second member, the engaging convex portion escapes from the engaging concave portion. With a simple operation such as pulling the two members, the lock mechanism can be released, and the rotation between the first member and the second member becomes possible again.

  Here, when one of the engagement convex part and the engagement concave part is provided with the first magnet and the other is provided with the second magnet or metal attracted by the first magnet, When the rotation angle between the first member and the second member reaches a predetermined target angle by the attractive force between the second magnet or the metal, the engaging convex portion automatically enters the engaging concave portion. The rotation between the first member and the second member is restricted. Moreover, the restriction | limiting of rotation becomes firm because both adsorb | suck.

  Further, when one of the first member and the second member is supported by a support shaft different from the rotation shaft so as to be rotatable in the gravity direction plane, the rotation member is moved with respect to the gravity direction. It can be used in a plurality of arrangements. At this time, the restriction of the rotation angle by entering the engagement convex portion into the engagement concave portion acts regardless of the arrangement with respect to the gravity, and the rotation angle between the first member and the second member is maintained at the target angle. be able to.

  When the rotating member constitutes a table provided in the vehicle seat and at least one of the first member and the second member is a table surface, the table surface is rotated downward by gravity or kicked up. It is possible to restrict both upward rotation due to the like. In addition, it becomes easy to use in various arrangements and for multipurpose use. On the other hand, since the restriction can be released by only a simple operation of pulling the table, the table can be easily stored after use.

It is a perspective view which shows the rotation member concerning one Embodiment of this invention. It is a figure which shows the connection part of the said rotation member, (a) is a side view, (b) is AA sectional drawing in (a), (c) is BB sectional drawing. It is a side view which shows the said connection part for every positional relationship of a 1st member and a 2nd member. It is sectional drawing which shows the locking part of the said rotation member for every positional relationship of a 1st member and a 2nd member. It is a perspective view which shows the example of the folding table provided in the vehicle seat, (a) is the time of folding, (b) has shown the time of expansion | deployment. It is a perspective view which shows the example of the armrest combined use table provided in the vehicle seat, (a) And (b) has shown the example of usage, respectively. It is a side view which shows the rotation state of the said armrest combined table, (a)-(d) has each shown the different state.

  Hereinafter, a rotating member according to an embodiment of the present invention will be described in detail with reference to the drawings.

[Configuration of rotating member]
(Overall configuration)
In FIG. 1, the structure of the rotation member 1 concerning one Embodiment of this invention is shown. The rotating member 1 has a flat plate-like first member 2 and a second member 3. One of the end faces (2a, 3b) constituting the side surfaces of the first member 2 and the second member 3 is formed in a semicircular cross section, and the first member 2 and the second member 3 have the end faces 2a, 2b are arranged on the same side so as to overlap each other as the end surface on the rotating shaft side. And it is mutually connected by the connection parts 4 and 4 in the side surface of the width direction both sides on both sides of rotating shaft side end surface 2a, 3a. The connection parts 4 and 4 connect the first member 2 and the second member 3 so as to be rotatable with respect to each other and detachable from each other. Then, two sets of lock portions 5 and 5 are provided on the rotation shaft side end surfaces 2 a and 3 a of the first member 2 and the second member 3. The lock parts 5 and 5 play a role of restricting the rotation angle from changing in a state where the first member 2 and the second member 3 are deployed in a planar shape by the rotation.

(Connecting member)
Here, the connecting portion 4 will be described. The structure of the connection part 4 is shown in FIG. Moreover, the change of the state of the connection part 4 is shown in FIG.

  As shown in FIG. 2, the connecting portion 4 includes one plate member 41 and two projecting members 42 and 43. The two protruding members 42 and 43 are integrally formed on the side surfaces of the first member 2 and the second member 3, respectively. The projecting members 42 and 43 integrally include shaft portions 42a and 43a and head portions 42b and 43b, respectively. The shaft portions 42 a and 43 a are shaft-shaped members that protrude laterally at the center positions in the thickness direction of the side surfaces of the first member 2 and the second member 3. The heads 42b and 43b are disk-shaped members having a larger diameter than the shafts 42a and 43a, and are provided at the tips of the shafts 42a and 43a. The plate member 41 is a plate-like member, and has guide holes 41a and 41b provided as two long hole-like through holes. The shaft portions 42a and 43a of the protruding members 42 and 43 are inserted into the two guide holes 41a and 41b. The plate member 41 is not fixed to other members.

  The plate member 41 has a plate thickness that is thinner than the protruding length of the shaft portions 42a, 43a of the protruding members 42, 43. The width of the guide holes 41a and 41b (the length in the short axis direction shown in FIG. 2A in the lateral direction) is larger than the shaft diameter of the shaft portions 42a and 43a of the projecting members 42 and 43, and It is smaller than the disc diameter of the heads 42b and 43b. Thereby, the protrusion members 42 and 43 inserted through the shaft portions 42a and 43a into the guide holes 41a and 41b of the plate member 41 are held in a state where they do not escape from the guide holes 41a and 41b. The lengths of the guide holes 41a and 41b (the length in the longitudinal direction shown in the longitudinal direction in FIG. 2A) are larger than the shaft diameters of the shaft portions 42a and 43a of the protruding members 42 and 43. . Thereby, the protrusion members 42 and 43 can relatively move in the major axis direction in the guide holes 41a and 41b. The specific lengths of the guide holes 41a and 41b are distances necessary for releasing the engagement of the lock portion 5 by separating the first member 2 and the second member 3 as will be described below. It is determined so that it can be secured. As shown in FIG. 2A, in the folded state in which the first member 2 and the second member 3 are overlapped, the projecting members 42 and 43 are closer to the inside than the center along the major axis direction of the guide holes 41a and 41b. It is arranged in the part.

  In FIG. 3, the state of the connection part 4 at the time of changing the positional relationship between the 1st member 2 and the 2nd member 3 is shown. FIG. 3A shows a folded state in which the first member 2 and the second member 3 are arranged so as to overlap each other as shown in FIG. The plate member 41 stands with the guide holes 41 a and 41 b perpendicular to the plate surfaces of the first member 2 and the second member 3. The protruding members 42 and 43 are arranged at a basic position closer to the inside than the center along the long axis direction of the guide holes 41a and 41b. From this state, the second member 3 is rotated in the unfolding direction D1 with respect to the first member 2 while maintaining the state in which the first member 2 and the second member 3 are in contact with each other at the rotation shaft side end surfaces 2a and 3a. Move and deploy. At this time, the tangent line between the rotation shaft side end surface 2a of the first member 2 and the rotation shaft side end surface 3a of the second member 3 becomes the rotation shaft. The second member 3 is moved from the folded state in FIG. 3A to the unfolded state in which the second member 3 in FIG. It is rotated. During this time, the plate member 41 is also rotated following the rotation of the second member 3, and finally the guide holes 41 a and 41 b are parallel to the surfaces of the first member 2 and the second member 3. In addition, the structure itself of such a connection part 4 does not have the factor which stops rotation of the 2nd member 3 in the expansion | deployment state of FIG.3 (c), and also rotates the 2nd member 3 to the direction D1. However, further rotation is prevented by the action of the lock portion 5 described below.

  In the unfolded state of FIG. 3C, the first member 2 and the second member 3 are in contact with each other at the rotation shaft side end surfaces 2a and 3a. From this state, as shown in FIG. Applying a pulling force to one or both of the first member 2 and the second member 3 along the separation direction D2 separating the first member 2 and the second member 3 without changing the rotation angle. Then, the first member 2 and the second member 3 are separated from each other within the length range of the guide holes 41a and 41b. The state in which the shaft portions 42a and 43a of the projecting members 42 and 43 are in contact with the outer edges of the guide holes 41a and 41b in the longitudinal direction corresponds to the state in which the first member 2 and the second member 3 are spaced apart to the maximum.

  As described above, the rotating member 1 uses the plate member 41 having the elongated guide holes 41 a and 41 b and the projecting members 42 and 43 formed integrally with the first member 2 and the second member 3. The first member 2 and the second member 3 are connected to each other at the side surface intersecting the rotation axis. Thereby, the 1st member 2 and the 2nd member 3 can be couple | bonded so that rotation is possible centering | focusing on a rotating shaft, and it can mutually isolate | separate.

(Lock part)
Next, the configuration of the lock unit 5 will be described. 4 (a) to 4 (d) show the state of the lock unit 5 in the state corresponding to FIGS. 3 (a) to 3 (d), respectively. First, the configuration of the lock unit 5 will be described based on the folded state of FIG. The lock portion 5 includes an accommodation recess 51 and an engagement protrusion 52 provided in the first member 2, a coil spring 53, and an engagement recess 55 provided in the second member 3.

  The housing recess 51 is formed in the first member 2 as a recess recessed inward from the rotation shaft side end surface 2a. The accommodating recess 51 is formed by connecting, in order from the bottom, three cylindrical spaces having different diameters, that is, a spring accommodating portion 51a, a convex portion accommodating portion 51b, and a convex portion passing portion 51c. The axes of the three cylindrical spaces coincide with the first engagement axis A1 orthogonal to the center position in the thickness direction of the rotation shaft side end surface 2a of the first member 2. The convex portion accommodating portion 51b has a larger inner diameter than the spring accommodating portion 51a and the convex portion passing portion 51c.

  The engaging convex part 52 has a cylindrical intrusion part 52b and a disc-shaped retaining part 52a formed integrally with the intrusion part 52b in a coaxial manner. The outer diameter of the intrusion part 52b is formed smaller than the inner diameter of the convex part passing part 51c of the accommodating recess 51, the outer diameter of the retaining part 52a is smaller than the inner diameter of the convex part accommodating part 51b, and the spring is accommodated. It is formed larger than the inner diameter of the part 51a and the convex part passing part 51c. The tip of the intrusion portion 52b is a first magnet 56 made of a permanent magnet. The engaging convex part 52 is accommodated in the convex part accommodating part 51b of the accommodating concave part 51 with the intrusion part 52b facing the opening side and the retaining part 52a facing the bottom part side.

  The coil spring 53 has one end coupled to the bottom of the housing recess 51 and the other end coupled to the end face of the retaining portion 52 a of the engagement projection 52. The central axis of the coil spring 53 coincides with the first engagement axis A1. Thereby, the engagement convex part 52 is the state couple | bonded with the 1st member 2 so that advance / retreat is possible along 1st engagement axis | shaft A1. In a state where the coil spring 53 is in a natural length, the entire engaging convex portion 52 is located in the accommodating concave portion 51. As the coil spring 53 expands and contracts and the engaging convex part 52 moves forward and backward, at least a part of the intruding part 52b can pass through the convex part passing part 51c and escape out of the accommodating concave part 51. The stop part 52a remains in the convex part accommodating part 51b.

  The engagement recess 55 is formed as a recess recessed inward from the rotation shaft side end surface 3a of the second member 3, and functions as a receiving portion into which the engagement protrusion 52 enters. The engagement concave portion 55 has an inner diameter larger than the outer diameter of the intrusion portion 52 b of the engagement convex portion 52, and is perpendicular to the center position in the thickness direction of the rotation shaft side end surface 3 a of the second member 3. It is formed as a cylindrical space along the axis A2. A second magnet 57 made of a permanent magnet that has an opposite polarity to the first magnet 56 and attracts the first magnet 56 is provided at the bottom of the engaging recess 55. The depth of the engagement recess 55, that is, the distance from the opening to the surface of the second magnet 57, as will be described later, is the first magnet provided in the engagement projection 52 that has entered the engagement recess 55 in the deployed state. 56 is defined so as to be in contact with the second magnet 57.

  When the second member 3 is rotated with respect to the first member 2 using the connecting portion 4 described above, the lock portion 5 passes through the state of FIG. 4 (b) as shown in FIG. 4 (c). It becomes a state. As shown in FIG. 4B, in the midway state until the unfolded state, only the positional relationship between the housing concave portion 51 and the engaging concave portion 55 changes, and the state of the engaging convex portion 52 and the coil spring 53 is not changed. There has been no substantial change.

  However, as shown in FIG. 4C, when the second member 3 is in a flattened state with respect to the first member 2, the first engagement shaft A <b> 1 and the second engagement shaft A <b> 2 coincide with each other. The accommodation recess 51 and the engagement recess 55 are communicated in a straight line. Then, due to the attractive force between the first magnet 56 and the second magnet 57, the engaging convex portion 52 is drawn toward the internal space of the engaging concave portion 55, and the intruding portion 52b passes through the convex portion passing portion 51c. It enters the housing recess 51. Then, the first magnet 56 is attracted to the second magnet 57. The coil spring 53 is in a state of being extended more than the natural length, and exerts a force in a direction to return the engaging convex portion 52 into the accommodating concave portion 51 by a restoring force, but between the first magnet 56 and the second magnet 57. By setting the attracting force to be larger than the restoring force of the coil spring 53, the engaging convex portion 52 enters the engaging concave portion 55, and the engaging state in which the first magnet 56 and the second magnet 57 are attracted is obtained. Maintained.

  By maintaining the state where the engaging convex portion 52 has entered the engaging concave portion 55, the second member 3 can be engaged with the first member 2 in the unfolding direction D <b> 1 or the opposite direction −D <b> 1. Due to the contact between the outer peripheral surface of the mating convex portion 52 and the inner wall surface of the engaging concave portion 55, it cannot be rotated. In this way, the rotation of ± D1 in two directions is restricted between the second member 3 and the first member 2 except for the play in the connecting portion 4 and the lock portion 5, and the unfolded state is strong. Maintained.

  In order to release the rotation restriction from the expanded state of FIG. 4C in which the rotation of the second member 3 with respect to the first member 2 is restricted in this way, one of the first member 2 and the second member 3 is released. Alternatively, a force for separating in the separation direction D2 within the range of the length of the guide holes 41a and 41b of the connecting member 4 may be applied to both. If the force exceeds the difference between the attraction force between the first magnet 56 and the second magnet 57 and the restoring force of the coil spring 53, the attraction between the first member 2 and the second member 3 is released, and the first The one member 2 escapes from the engaging recess 55 by the restoring force of the coil spring 53 and is pulled back to the receiving recess 51. In this way, the engagement in the lock portion 5 is released, and the first member 2 and the second member 3 are separated. Then, the second member 3 can be rotated with respect to the first member 2 again.

  By using such a lock part 5 together with the connecting part 4 that enables the rotation and separation between the first member 2 and the second member 3 as described above, the first member 2 and the second member are used. In the deployed state where the pivot angle between 3 is 180 °, both pivot states are locked, and the rotation angle is restricted from changing in either the deployment direction D1 or the opposite direction -D1. It is possible. On the other hand, the rotation angle is changed by releasing the rotation restriction and returning to the folded state by a simple operation of applying a force between the first member 2 and the second member 3 in the separation direction D2. Is possible. As described above, in the present rotating member 1, the bidirectional rotation restriction around the rotation axis and the simple restriction release are compatible with a simple configuration.

(Other forms)
As the rotating member according to the present invention, various forms other than the above-described embodiment can be considered and can be used to configure various articles. If the first member 2 and the second member 3 are plate-shaped members as described above, they can be widely used for tables and the like as described below, but the first member 2 and the second member 3 are Besides the plate shape, various shapes can be adopted. In addition, as described below as the armrest combined table 70, one of the first member 2 and the second member 3 is used as a support shaft different from the rotation shaft between the first member 2 and the second member 3. It can also be made to be rotatable with respect to the support shaft. Then, using the fact that the rotation between the first member 2 and the second member 3 is regulated in both the deployment direction D1 and the opposite direction −D1 by the lock portion 5, gravity is applied regardless of the attitude with respect to the support shaft. Since the rotation between the first member 2 and the second member 3 can be restricted against this, the rotation member 1 can be used in various arrangements.

  Other forms of the lock unit 5 are also conceivable. First, in the above description, the first magnet 56 and the second magnet 57 that attract each other are provided on the surface of the engaging convex portion 52 and the inside of the engaging concave portion 55, respectively, but both need not necessarily be magnets. You may comprise from the metal (ferromagnetic metal) attracted | sucked by a magnet. Moreover, in said embodiment, the engagement convex part 52 is connected with the 1st member 2 so that advance / retreat is possible, and the advancing / retreating direction which penetrates into the engagement recessed part 55 is a direction of 180 degrees with respect to the surface of the 1st member. Since the second member 3 has a 180 ° rotation angle with respect to the first member 2, the engaging convex portion 52 enters the engaging concave portion 55 and the second member with respect to the first member 2. The rotation of 3 was restricted. However, if a predetermined target angle is determined, not limited to 180 °, and the engaging convex portion 52 moves forward and backward, and the advancing and retracting direction entering the engaging concave portion 55 matches the target angle, the first member 2 and the first member 2 In a state where the rotation angle between the two members 3 is the target angle, the change in the rotation angle can be restricted. Further, in the above embodiment, the advancing / retreating direction is perpendicular to the rotation axis between the first member 2 and the second member 3, but if the advancing / retreating direction intersects the rotation axis, it is not necessarily perpendicular. Even if they do not intersect, the rotation between the first member 2 and the second member 3 around the rotation axis can be restricted.

  Furthermore, in the above embodiment, a magnet is used as means for automatically pulling the engaging convex portion 52 into the engaging concave portion 55 and maintaining the state where the engaging convex portion 52 has entered the engaging concave portion 55. However, it is not always necessary to use a magnet. For example, an operation member that can be operated from the outside, such as a lever, is coupled to the engagement convex portion 52, and the user can change the rotation angle between the first member 2 and the second member 3 to a target angle. The operating member may be manually operated to move the engaging convex portion 52 forward and backward to control entry / exit into the engaging concave portion 55.

[Use of vehicle seats as a table]
The rotating member 1 according to the above embodiment of the present invention can be suitably used as a member constituting a table provided on a vehicle seat. One or both of the first member 2 and the second member 3 may be used as a table surface. In the vehicle seat, the space in which the table can be arranged is limited. Therefore, by using the rotation between the first member 2 and the second member 3 to select the folded state and the unfolded state, the vehicle seat can be accommodated. A convenient table can be provided for use. Further, since the rotation angle between the first member 2 and the second member 3 can be held at a predetermined target angle by the lock portion 5, the vibration from the vehicle and the contact with the occupant, luggage, etc. are received. However, the rotation state is hardly changed, and particularly high convenience is obtained. Examples of use as two types of tables are shown below.

(Folding table)
As a first example, a folding table provided on the vehicle seat S exclusively for use as a table is shown in FIG.

  The folding table 1 has the same configuration as the rotating member 1 according to the embodiment described above, and includes the connecting portion 4 and the lock portion 5 as described above. In the folding table 1, the first member 2 is attached to one of the armrests S1, S2 (here, the left armrest S1 with respect to the seat S) provided on both sides of the vehicle seat S, and the other armrest S2 is mounted. The first member 2 is disposed so as to pass in the width direction. In the folded state of FIG. 5 (a), the folding table 1 is arranged so that the end surfaces on the rotary shaft side of the first member 2 and the second member 3 provided with the lock portion 5 face the front side of the seat S. The two members 3 are arranged on the upper side of the first member 2. The folding table 1 is attached to the armrest S1 so as to be rotatable toward the outer side in the width direction of the sheet S. When not in use, the folding table 1 is folded as shown in FIG. It can be made into the state which does not become a passenger | crew's obstruction easily by rotating to.

  When the folding table 1 is used, when the second member 3 of the folding table 1 passed between the two armrests S1 and S2 is rotated forward, the second member 3 as shown in FIG. Is in a deployed state with respect to the first member 2, the lock mechanism is activated, and the rotation of the second member 3 is restricted and locked in the deployed state. Then, the second member 3 is prevented from further rotating downward due to the weight of the second member 3 or the weight of the article placed on the second member 3. Further, even if the second member 3 receives a force from the bottom to the top by kicking up by an occupant seated on the seat S, it is prevented from rotating upward. From this state, when the occupant pulls the first member 2 or the second member 3 away from each other, the lock is released and the folded state shown in FIG. 5A can be restored. When a wide table surface is not required, only the plate surface of the second member 3 can be used as the table surface while the second member 3 is folded as shown in FIG.

(Armrest combined use table)
As a second example, an armrest / table 70 provided on the vehicle seat S is shown in FIGS.

  The armrest combined table 70 has a first member 72, a second member 73, and a third member 74 that are stacked in this order in the folded state. The first member 72 and the second member 73 use the configuration of the rotating member 1 according to the above-described embodiment, and include the connecting portion (not shown) and the lock portion 75 as described above. The second member 73 and the third member 74 are connected by a general hinge 77 that restricts rotation in one direction. As shown in FIG. 7A, in the second member 73, the third member 74 is connected to the end edge on the same side as the lock portion 75 by a hinge 77. As shown in FIG. 7B, the hinge 77 is arranged so that the angle between the second member 73 and the third member 74 does not become larger than a predetermined angle (about 135 ° in the figure). Regulates rotation. Although the 1st member 72 is formed in flat form, the 2nd member 73 is equipped with the accommodating part 73a dug inward from the surface used as the 3rd member 74 side in a folding state. In addition, the third member 74 includes a cushion material 74a on the outer surface in the folded state and a mirror 74b on the opposite surface. The second member 73 and the third member 74 are provided with magnet pairs 73b and 74c that are attracted to each other at positions where they are in contact with each other in the folded state.

  The armrest combined table 70 is attached to one armrest S1 of the seat S via an attachment member 76 connected to the first member 72 as shown in FIG. The attachment member 76 is attached to the armrest S1 so as to be rotatable about a first support shaft A3 in a substantially vertical direction. Thereby, the armrest combined use table 70 can be rotated in the substantially horizontal direction D3. In addition, the armrest / table 70 is connected to the attachment member 76 in the first member 72 so as to be rotatable about the second support shaft A4 in the substantially horizontal direction. Thereby, the armrest combined table 70 can be rotated in the substantially vertical direction D4.

  The armrest combined table 70 selects the rotation state between the first member 72, the second member 73, and the third member 74 and the entire rotation state around the two support shafts A3 and A4. Can be used in a variety of ways. First, as shown in FIG. 7A, in the folded state where the first member 72, the second member 73, and the third member 74 are all stacked, if the third member 74 provided with the cushion material 74a is disposed upward, Can be used as an armrest. At this time, if the armrest combined table 70 is arranged on the side of the seat S by adjusting the rotation direction around the first support shaft A3, the occupant seated on the seat S can move the arm in the lateral direction of the body. Can be placed. On the other hand, if the armrest / table 70 is arranged in front of the seat S as shown in FIG. 6A, the occupant can place the arm in front of the body.

  Next, when the third member 74 is rotated with respect to the second member 73 from the folded state as shown in FIG. 7B, the third member 74 is opened by a predetermined angle determined by the hinge 77. The rotating state of the third member 74 is maintained. As a result, the surface of the third member 74 on which the mirror 74b is provided appears. Therefore, if the armrest combined table is arranged in front of the seat S by turning around the first support shaft A3, the seated person remains in the sitting posture. Then, you can see your face reflected in the mirror 74b. Further, the article can be stored in the storage portion 73a provided in the second member 73, or the stored article can be taken out.

  On the other hand, when the second member 73 is rotated relative to the first member 72 with the third member 74 from the folded state as shown in FIG. Then, the rotation between the first member 72 and the second member 73 is restricted by the lock portion 75 in a state of being flatly developed. In this state, the plate surfaces of the first member 72 and the second member 73 facing upward can be used as a continuous table surface. By rotating around the first support shaft A3, the table surface can be used in any arrangement on the side of the sheet S and in front of the sheet S. In this state, the third member 74 is disposed on the lower side of the second member, but the third member 74 is provided with the magnet pairs 73b and 74c between the second member 73 and the third member 74. 74 is prevented from being developed by gravity with respect to the second member 73. Accordingly, the third member 74 maintains the function as a lid of the storage portion 73b provided on the second member 73, and the articles stored in the storage portion 73b are prevented from falling.

  Furthermore, in the state which expanded the 2nd member 73 with respect to the 3rd member 74 like FIG.7 (c), using the rotation (direction D4) centering on 2nd support shaft A4, it is an armrest combined table. When the 70 is rotated 180 ° in the plane of gravity, the surface of the first member 72 and the surface of the cushion material 74a of the third member 74 are adjacently facing upward as shown in FIG. It becomes. In this state, the armrest combined table 70 can be used as a cushioned table. For example, if the armrest combined table 70 is arranged in front of the seat S by the first support shaft A3 and the cushion material 74a faces the inside of the seat S, the seat is seated on the seat S as shown in FIG. An occupant can operate a device PC such as a notebook personal computer placed on the surface of the first member 72 while placing a hand on the cushion material 74a.

  In the armrest / table 70, the lock portion 75 provided between the first member 72 and the second member 73 restricts the rotation between the first member 72 and the second member 73 in two directions. In both the state of FIG. 7C and the state of FIG. 7D in which the direction of the surface is 180 ° different from the direction of gravity, the rotation of the second member 73 relative to the first member 72 in both the upper and lower directions can be restricted. . Therefore, both front and back surfaces of the first member 72 can be used as a table surface. Note that when the mirror 74b and the storage portion 63a are not provided and used only as an armrest and a table, the third member 74 may not be provided, and the upper surface of the second member 73 connected to the first member 72. A cushioning material may be provided directly on the surface.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

1 Rotating member (folding table)
2 First member 2a Rotating shaft side end surface 3 of the first member 2nd member 3a Rotating shaft side end surface 4 of the second member 4 Connecting portion 41 Plate members 41a, 41b Guide holes 42, 43 Protruding member 5 Locking portion 51 Containing recess 51a Spring accommodating part 51b Convex part accommodating part 51c Convex part passing part 52 Engaging convex part 52a Retaining part 52b Intruding part 53 Coil spring 55 Engaging concave part 56 First magnet 57 Second magnet 70 Armrest combined table 72 First member 73 Second member 73a Storage part 74 Third member 74a Cushion material 74b Mirror 75 Lock part 76 Attachment member 77 Hinge

Claims (4)

A first member and a second member connected to each other about a rotation axis so as to be rotatable with respect to each other and detachable from each other;
An engaging projection coupled to the first member so as to be capable of advancing and retreating in the advancing and retreating direction intersecting the rotation axis;
In a state where the rotation angle between the first member and the second member is a target angle, the engagement convex portion is provided on the second member as a receiving portion that can enter along the advancing and retreating direction. A recess, and
The engaging convex part that has entered the engaging concave part is escaped from the engaging concave part by applying a force for separating the first member and the second member from each other. .   One of the engagement convex part and the engagement concave part is provided with a first magnet, and the other is provided with a second magnet or metal attracted by the first magnet. Item 2. The rotating member according to Item 1.   The one of said 1st member and said 2nd member is supported by the support shaft different from the said rotation axis so that rotation is possible within a gravity direction surface. Rotating member.   The said rotation member comprises the table with which a vehicle seat is equipped, At least one of said 1st member and said 2nd member becomes a table surface, The any one of Claim 1 to 3 characterized by the above-mentioned. The rotating member described.

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