JP2013074925A - Rocking bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rocking bed having a seat which can be rocked when used as a bed, and automatically regulating rocking of the chair when used as a chair.SOLUTION: A rocking lock mechanism 51 of the rocking bed 10 includes: a locking member 53 disposed in a seat 11 and whose position is changed according to a reclining angle of a backrest 21; and an engagement part 57 formed at a base part 31 to receive the locking member 53. The rocking of the seat 11 is permitted by separating the locking member 53 from the engagement part 57 when used as a bed, while regulating the rocking of the seat 11 by engaging the locking member 53 with the engagement part 57 when used as a chair.

Description

  The present invention relates to a swing bed for babies that not only takes the form of a bed that can swing by tilting the backrest part, but also takes the form of a chair by raising the backrest part.

  Conventionally, various types of swing beds are known. For example, a swing chair described in Japanese Patent Laid-Open No. 2006-198186 (Patent Document 1) has a seat portion and a backrest portion, and the backrest portion can be tilted backward from the chair state to the bed state. In addition, a seat body including a seat portion and a backrest portion is supported by the seat support member so as to be swingable.

JP 2006-198186 A

  However, the present inventor has found that there is a point to be further improved in the conventional swing chair. That is, in the bed state, the seat body should be swung at a suitable cycle in order to induce the sleep of the infant. On the other hand, if it is possible to swing even in a chair state, the upper body of the infant sitting on the seat body will swing unintentionally. For this reason, it is desirable to regulate the swing of the seat body in the chair state so as not to hinder the care of the infant or to disturb the balance of the posture of the infant.

  Although the conventional swing chair includes a known swing lock mechanism that allows or restricts the swing of the seat body, the operation of the swing lock mechanism is entrusted to an infant's guardian. For this reason, unless the guardian consciously operates the swing lock mechanism and regulates the swing of the seat body, the seat body swings even in the chair state.

  In view of the above situation, the present invention eliminates the need for the guardian to operate the rocking lock mechanism consciously, enables the seat to rock in the bed state, and restricts the rocking of the seat in the chair state. An object is to provide a swing bed.

  For this purpose, the rocking bed according to the present invention comprises a seat, a backrest connected to the seat and capable of adjusting a reclining angle from a chair state to a bed state, and a base that supports the seat so as to be rockable. A rocking lock mechanism that allows or restricts rocking of the seat portion. The rocking lock mechanism includes a lock member that is provided on the seat portion and is displaced according to a reclining angle of the backrest portion, and an engagement portion that is formed on the base portion and receives the lock member, and the lock member in the bed state. The seat is separated from the engaging portion to allow the seat to swing, and in a chair state, the lock member is engaged with the engaging portion to restrict the swing of the seat.

  According to the present invention, the rocking lock mechanism has a lock member that is displaced according to the reclining angle of the backrest part, and allows the seat part to rock by detaching the lock member from the engaging part in the bed state, Since the lock member is engaged with the engagement portion in the chair state and the swinging of the seat portion is restricted, the lock member can be automatically displaced in conjunction with the reclining angle of the backrest portion. Therefore, even if the guardian of the infant does not bother to operate the lock member, it is possible to allow the seat to swing in the bed state and to restrict the swing in the chair state. The shape of the engaging portion is not particularly limited, and is, for example, a recess or a hole that receives the lock member.

  The bed state is not limited to a state where both the seat portion and the backrest portion are leveled. For example, it should be understood that even if the backrest is tilted backward from 150 degrees to 180 degrees, it is included in the bed state. In addition, the seat is normally horizontal, but the front of the seat may be higher than the rear so that an infant can sit deeply. Therefore, for example, it should be understood that even if the seat is tilted backward from 0 degrees to 30 degrees, it is included in the bed state. In the reclining type swing bed, the reclining angle can be adjusted stepwise or steplessly, so that the bed state is defined to be larger than the predetermined reclining angle and the chair state is smaller than the predetermined reclining angle. You may prescribe.

  As one embodiment, the lock member is disposed behind the backrest portion, and when the backrest portion is tilted backward to the bed state, the lock member comes into contact with the backrest portion to be in an unlocked position allowing swinging, and the backrest portion When it is raised to the chair state, the lock member moves away from the backrest portion and returns to the lock position where the swinging is restricted. As another embodiment, a link mechanism or a gear mechanism is interposed between the lock member and the backrest portion, and the reclining angle of the backrest portion is transmitted to the lock member to change the position of the lock member. For example, the rocking lock mechanism further includes a cam that rotates in conjunction with the reclining angle, and the lock member is slidably contacted with the cam. According to this embodiment, the lock member can be displaced according to the rotation angle of the cam. The cam of the rocking lock mechanism is a disc having an oval-shaped contour in part and a perfect circular contour in the remaining portion, and the reclining angle of the backrest portion is transmitted. As another embodiment, the cam of the rocking lock mechanism has an arc-shaped contour centered on the axis of the backrest portion, and a contour recessed radially inward of the arc-shaped contour or an arc-shaped contour. It has a contour bulging outward in the direction. And the perfect circle shape part or circular arc shape part of a cam respond | corresponds to a chair state, and the swelling part or hollow part of a cam respond | corresponds to a bed state.

  The swing lock mechanism of the present invention is not particularly limited in terms of size and arrangement location. The rocking lock mechanism may be provided at the front part, the rear part, or the front-rear center part of the rocking bed, or at the one edge in the width direction, the other edge in the width direction, or the center part in the width direction. May be.

  As one embodiment, the rocking lock mechanism includes gear teeth that rotate according to the reclining angle of the backrest portion, and an intermediate gear that transmits the rotation of the gear teeth to the cam. Alternatively, as a preferred embodiment, the backrest portion is connected to the seat portion via a shaft extending in the width direction, the reclining angle is adjusted around the shaft, and the cam is provided on the backrest portion so as to be coaxial with the shaft. . According to this embodiment, the cam rotates integrally with the backrest portion, and the cam rotates at the same angle as the reclining angle of the backrest portion. Therefore, the rocking lock mechanism can be operated according to the reclining angle. Further, since the connecting shaft between the seat portion and the backrest portion is located at the center portion in the front-rear direction of the swing bed, a lock mechanism can be provided at the center portion in the front-rear direction of the swing bed. Therefore, the seat portion can be stably locked at the central portion in the front-rear direction, and the possibility that the guardian accidentally touches the lock mechanism can be reduced.

  As one embodiment of the rocking lock mechanism, the cam may be formed small and the lock member may be disposed in the vicinity of the shaft of the backrest portion, or as another embodiment, the cam may be formed large and the lock member may be disposed on the shaft of the backrest portion. You may arrange | position away from. Further, as one embodiment, the swing lock mechanism may be provided at the center in the width direction, but as a preferred embodiment, the swing lock mechanism may be provided at one end or both ends in the width direction. According to this embodiment, since the rocking lock mechanism is arranged away from the center region in the width direction, the center region in the width direction of the axis of the backrest portion can be made clear, which is advantageous in terms of layout.

  Since the cam comes into contact with the lock member, it is preferable that the rocking lock mechanism is separated from the infant so that the infant sitting on the seat portion and leaning on the backrest portion does not touch the lock member. As one embodiment, the backrest portion has a backrest surface formed in the center region in the width direction, and a backrest side wall formed on both sides in the width direction and rising from the backrest surface, and the cam is located on the outer side in the width direction of the backrest side wall. Be placed. According to this embodiment, since the cam is disposed on the outer side in the width direction of the backrest side wall, the cam can be hidden from the infant sitting on the swing bed, which is advantageous in terms of safety. The cam disposed on the outer side in the width direction of the backrest side wall may be a separate member from the backrest side wall, or may be formed integrally with the backrest side wall.

  Since the lock member comes into contact with the cam, it is preferable to arrange the rocking lock mechanism so as not to be exposed to the outside. As one embodiment, a cover that covers the rocking lock mechanism is provided. As a preferred embodiment, the seat portion has a seat surface formed in the center region in the width direction and seat side walls formed on both sides in the width direction and rising from the seat surface, and the backrest side wall is inward in the width direction from the seat side wall. The cam is provided on the outer side surface in the width direction of the backrest side wall and covered with the seat side wall. According to this embodiment, the contact portion of the cam and the lock member is disposed between the backrest side wall and the seat side wall, and the swing lock mechanism can be hidden so as not to be exposed to the outside. Therefore, it is possible to prevent danger such as finger filling.

  As a more preferred embodiment, the base portion has a partition wall that partitions the width direction outer space and the width direction inner space, and the engagement portion of the swing lock mechanism is formed on the inner wall surface in the width direction of the partition wall, The locking member of the mechanism may be arranged on the inner side in the width direction than the partition wall. According to this embodiment, the lock member can be hidden on the inner side in the width direction of the base portion so that the engagement portion between the lock member and the engagement portion is not exposed to the outside, which is advantageous in terms of safety.

  The base portion can swingably support the seat portion by various methods. As one embodiment, the seat is suspended from the base through the rod, the upper end of the rod is connected to the base, the lower end of the rod is connected to the seat, and the lower end of the rod is the front-rear direction with respect to the upper end of the rod. Rocks. As another embodiment, the base portion is provided with a rail extending horizontally in the front-rear direction, the seat portion is provided with a guide member guided by the rail, and the guide member reciprocates in the front-rear direction along the rail. Further, the base portion is provided with a power portion that applies a thrust in the front-rear direction to the seat portion at a predetermined cycle.

  As a preferred embodiment, either the base portion or the seat portion has a pair of curved raceway surfaces extending in the front-rear direction on both sides in the width direction, and the other base portion and the remaining seat portion roll along the raceway surface. The seat part swings with respect to the base part as the rolling element reciprocates on the raceway surface. According to this embodiment, the rod for hanging is unnecessary, and the vertical dimension of the seat part and the base part can be reduced. If no thrust is applied to the seat portion, the rolling element naturally returns to the center in the front-rear direction of the raceway surface, so that the lock member and the engaging portion can be in the same position in the front-rear direction. Therefore, it is possible to easily engage the engaging portion simply by pushing the lock member upward.

  The raceway surface is provided, for example, downward on the seat, and has a curved surface that is highest at the center in the front-rear direction and gradually decreases toward the front end and the rear end. On the other hand, the rolling element is rotatably provided on the base portion. The raceway is placed on the upper edge of the rolling element, and the raceway is reciprocated in the front-rear direction while the rolling element rotates. Alternatively, the raceway surface and the rolling element may be placed upside down so that the raceway surface is provided on the base portion, the rolling body is provided on the seat portion, and the rolling body reciprocates on the raceway surface.

  In such an embodiment, one rolling element rolls per track surface. And the raceway surface and rolling element which make a pair in this way are each arrange | positioned at the front and rear, right and left of a rocking bed, respectively. The center of gravity of the seat and the infant is positioned at the center of the rolling elements arranged on the front, rear, left and right of the swing bed, and stably supports the seat and the infant. The position of the rocking lock mechanism is not particularly limited, and may be the front side of the front rolling element or the rear side of the rear rolling element, but preferably the front rolling element and the rear rolling element. It is arranged between moving objects. Thereby, the rocking | locking locking mechanism can be arrange | positioned in the vicinity of the gravity center of a seat part and an infant, and a seat part can be locked stably.

  According to the swing bed of the present invention, if the guardian raises the backrest portion to the chair state, the seat portion is automatically locked so as not to swing, and the guardian tilts the backrest portion back to the bed state. The seat is automatically made swingable. Therefore, even if the guardian is conscious of not operating the lock mechanism, the seat is automatically made unswingable in the chair state.

It is a perspective view which shows the rocking bed which becomes one Example of this invention. It is a side view which shows typically the basic composition of a rocking | fluctuation lock mechanism. It is a side view which shows typically the basic composition of a rocking | fluctuation lock mechanism. It is a side view which shows the rocking bed of a bed state. It is a cross-sectional view which expands and shows a rolling element and a raceway surface. It is a longitudinal cross-sectional view which shows the rocking bed of a bed state. It is a cross-sectional view which expands and shows the rocking | fluctuation lock mechanism by which the rocking | fluctuation lock was cancelled | released. It is a longitudinal cross-sectional view which shows the rocking | swiveling bed of a chair state. It is a cross-sectional view which expands and shows the rocking | fluctuation lock mechanism of a locked state. It is a perspective view which takes out and shows the cam and lock member of a rocking | fluctuation lock mechanism. It is a perspective view which shows the locking member attached to the seat part. It is a perspective view which shows the locking member attached to the seat part. It is a perspective view for demonstrating the attachment method of a lock member. It is the perspective view which removed the seat surface and outer side wall of the seat from FIG. 11, Comprising: The positional relationship of a cam, a locking member, and a recessed part is represented.

  Hereinafter, embodiments of the present invention will be described in detail based on examples shown in the drawings.

  FIG. 1 is a perspective view showing a swing bed according to an embodiment of the present invention, and shows a chair state in which a backrest portion is raised forward. FIG. 2 is a side view schematically showing the basic configuration of the rocking lock mechanism, and shows a bed state. FIG. 3 is a side view schematically showing the basic configuration of the rocking lock mechanism, and shows a chair state. FIG. 4 is a side view showing the same embodiment viewed from the outside in the width direction, and shows a bed state in which the backrest portion is tilted backward. The swing bed 10 includes a seat portion 11 that supports the lower body of the infant, a backrest portion 21 that supports the upper body of the infant, a base portion 31 that supports the seat portion 11, and a leg portion 41 that supports the base portion 31. Have.

  The seat portion 11 has a substantially horizontal upwardly facing seat surface 12, and the seat surface 12 supports the lower half of the infant from below. The seat portion 11 has seat side walls 13 and 13 that rise from both sides of the seat surface 12 in the width direction. The seat side wall 13 holds the infant on the seat surface 12. A footrest portion 66 having a shape that hangs downward can be attached to the front portion of the seat portion 11. The footrest surface 66s formed at the lower end of the footrest portion 66 supports the foot portion of a large infant that has grown with age. Further, the footrest portion 66 is rotatably connected to the front end of the seat portion 11 via a shaft 66a whose upper end extends in the width direction. Therefore, the footrest portion 66 is rotatable about a shaft 66a extending in the width direction to a height position substantially the same as the seat surface 12, and supports the lower leg portion of a large infant in the bed state.

  The backrest portion 21 is connected to the rear portion of the seat portion 11 via a shaft 24 and rises rearward or upward from the rear portion of the seat portion 11. The backrest portion 21 has an upward or forward-facing backrest surface 22, and backrest side walls 23 and 23 that are provided on both sides in the width direction of the backrest surface 22 and rise from the backrest surface 22. The backrest surface 22 supports the infant's back. The backrest side wall 23 holds the infant on the backrest surface 22. Moreover, the backrest part 21 is provided with a pair of shoulder belts 25 that restrain the infant's shoulders. Although not shown in the figure, the backrest portion 21 may have a head guard that stands up from the backrest surface 22 and protects the infant's head at the front-rear direction end away from the shaft 24. The seat part 11 and the backrest part 21 constitute a seat for accommodating an infant. In the specification, the width direction refers to the left-right direction when viewed from the infant seated on the seat portion 11 and the backrest portion 21, and the front-rear direction refers to the horizontal direction from the foot portion to the head as viewed from the infant. This means the vertical direction from the foot to the head when viewed from this infant.

  The shafts 24 are respectively provided on both sides in the width direction and connect the back side wall 23 and the seat side wall 13 on one side in the width direction, and connect the back side wall 23 and the seat side wall 13 on the other side in the width direction and extend in the width direction. Configure a simple axis. FIG. 6 is a cross-sectional view showing a partial cross-sectional view of the swing bed 10 as viewed from the width direction inner side to the width direction outer side. The backrest side wall 23 is disposed on the width direction inner side than the seat side wall 13.

  The backrest part 21 can adjust its reclining angle by rotating around the axis 24. In this embodiment, the reclining angle can be adjusted stepwise, and the swinging bed 10 is brought into the bed state by maintaining the reclining angle of the backrest portion 21 with respect to the seat portion 11 at about 170 ° as shown in FIG. Can be. Moreover, the rocking bed 10 can be made into a chair state by maintaining the reclining angle of the backrest part 21 at any value of 90 ° to 140 °.

  The reclining angle is held by a known reclining angle holding mechanism. The reclining angle holding mechanism includes, for example, a plurality of holes 62, 62, 62... Formed at predetermined intervals in the width direction on one side and the other side of the seat portion 11 around the shaft 24, and the width of the backrest portion 21. It consists of a pair of rods 63 that are respectively attached to one side and the other side in the direction and are selectively inserted into one of the holes 62. In the bed state, as shown in FIG. 4, the rod 63 is inserted into the hole 62 formed at the lowest position. The hole 62 is covered with the cover and is not exposed to the outside in the width direction. However, in order to facilitate understanding of the reclining angle holding mechanism, the cover for covering the hole 62 and the shaft 24 from the outside in the width direction is removed in FIG. Represent.

  The rocking bed 10 provides a place for an infant to lie in the bed. The reclining angle for lying down is not limited to 180 °, and the backrest 21 may be slightly raised forward. In the swing bed 10 of this embodiment, the reclining angle of the backrest 21 is set to 170 ° in the bed state. In addition, it should be understood that the bed state in the present invention is included in a range where the reclining angle is 150 ° or more and 180 ° or less. In addition, it should be understood that the chair state in the present invention is included in a range where the reclining angle is 90 ° or more and less than 150 °. The swing bed 10 changes to a chair for an infant to sit in a chair state.

  A swing mechanism for swinging the seat portion 11 in the front-rear direction is provided between the seat portion 11 and the base portion 31. As shown in the side view of FIG. 4, the swing mechanism is a wheel-like rolling element 14 rotatably attached to the lower portion of the seat portion 11, and an upward track formed inside the base portion 31 and extending in the front-rear direction. A surface 34 and a power unit (not shown) that is provided between the pair of base portions 31 and applies a thrust in the front-rear direction to the seat portion 11 are provided. The power unit has a permanent magnet and an electromagnet, and generates a thrust in the front-rear direction by a repulsive force between these magnets. On the outer side in the width direction of one base portion 31, there is provided an operation portion 37 that includes an operation switch operated by an infant guardian and controls the power portion. The rolling element 14 is housed inside the seat portion 11 and is not exposed to the outside in the width direction. However, in order to facilitate understanding of the swing mechanism, a wall that covers the rolling element 14 from the outside in the width direction is shown in FIG. Removed to represent. Further, the raceway surface 34 is also formed inside the base portion 31 and is not exposed to the outside in the width direction. However, in order to facilitate understanding of the swing mechanism, a wall that covers the raceway surface 34 from the outside in the width direction is shown in FIG. Removed to represent.

  The raceway surface 34 is formed in the front part and the rear part of the base part 31, respectively. The raceway surface 34 is an upward surface and is a rail extending in the front-rear direction, and supports the rolling elements 14 from below. The rolling elements 14 are respectively attached to the front part and the rear part of the seat part 11 and supported by the raceway surfaces 34 respectively.

  FIG. 5 is an enlarged cross-sectional view showing the rolling elements and the raceway surface, and shows a state seen in the front-rear direction. The base portion 31 is a box extending in the front-rear direction, and is provided symmetrically on one side in the width direction and the other side in the width direction. A connecting portion 65 is formed inside the base portion 31 in the width direction. The connecting part 65 is formed at each of the front part and the rear part, and the end part of the cross member 64 extending in the width direction is inserted and fixed. As a result, the pair of base portions 31 are connected by the two front and rear cross members 64. The upper ends of the leg portions 41 are connected to the front portion and the rear portion of the base portion 31, respectively.

  The base part 31 supports the seat part 11 from below. The rolling elements 14 are provided on both the front and rear sides and the width direction sides of the seat portion 11, and a total of four rolling elements 14 are attached. Further, the raceway surface 34 is also provided at the front portion and the rear portion of the base portion 31 so as to correspond to each rolling element 14, and a total of four raceway surfaces 34 are formed.

  A shaft 15 extending in the width direction is coupled to the rolling element 14, and both ends of the shaft 15 protrude from the rolling element 14 with a substantially equal length. The rolling element 14 is disposed on the outer side in the width direction than the outer wall 17 depending from the outer end in the width direction of the seat portion 11. The outer end in the width direction of the shaft 15 is inserted into a hole 15h formed in the outer end in the width direction of the seat portion 11, and is attached rotatably. The inner end in the width direction of the shaft 15 is inserted into a vertically long notch 17c extending upward from the lower edge of the outer wall 17, and is held rotatably.

  The rolling element 14 is attached to the lower portion of the seat portion 11 via a shaft 15 extending in the width direction of the swing bed 10. As the rolling element 14 rolls on the raceway surface 34, the seat 11 swings on the base 31 in the front-rear direction. The seat 11 and the backrest 21 are stably supported on the base 31 by the four rolling elements 14.

  On both sides of the raceway surface 34 in the width direction, flanges 35 that are steps protruding upward from the raceway surface are formed. As a result, the raceway surface 34 and the flanges 35, 35 are formed in a cross-sectional shape that is recessed downward, such as a concave shape, and the rolling element 14 rolls on the raceway surface 34 without departing from the raceway surface 34. Although not shown in the drawing, the seat portion 11 and the base portion 31 are provided with stopper means for preventing the seat portion 11 from excessively swinging. Therefore, the rolling element 14 is prevented from jumping out in the front-rear direction beyond the raceway surface 34.

  The upward track surface 34 is formed in an arc shape having the lowest center in the front-rear direction and the highest both ends in the front-rear direction, and is gently curved. The four rolling elements 14 are arranged so as to be simultaneously positioned in the center in the front-rear direction of the respective raceway surfaces 34. And the four track surfaces 34 are arrange | positioned so that the four rolling elements 14 may carry out the same motion in the front-back direction and an up-down direction. Specifically, the four rolling elements 14 have the same diameter, and the four raceway surfaces 34 all have the same curvature.

  When a thrust in the front-rear direction is applied to the seat portion 11, the plurality of rolling elements 14 simultaneously move on the respective track surfaces 34 with the same movement. When the thrust in the front-rear direction is not applied to the seat portion 11, the plurality of rolling elements 14 naturally stop at the center of the raceway surface 34 in the front-rear direction. The position in the front-rear direction of the seat at this time is hereinafter referred to as a natural stop position. Further, when a forward thrust is applied to the seat 11 for a moment, the rolling element 14 advances from the center in the front-rear direction of the raceway surface 34 and rolls to the front end of the raceway surface 34, and then naturally retreats, After passing, the track moves back to the rear end of the track surface 34 and moves forward again toward the center of the track surface 34 in the front-rear direction. In this way, the power unit applies a thrust of a predetermined period to the seat part 11, so that the seat part 11 swings in the front-rear direction. If the power unit does not give thrust, the seat 11 returns to the natural stop position that is the center of the swinging region extending in the front-rear direction.

  Next, the rocking lock mechanism of this embodiment will be described. FIG. 6 is a longitudinal sectional view showing the swing bed in the bed state, and shows a state where the outside is viewed from the inner side in the width direction. FIG. 7 is a cross-sectional view showing a state in which the swing lock mechanism with the swing lock released is viewed from the front-rear direction, showing from the center C in the width direction to the outer edge in the width direction and corresponding to the bed state in FIG. To do. FIG. 8 is a longitudinal sectional view showing a schematic configuration of the swing bed in the chair state, and shows a state in which the outside is viewed from the inner side in the width direction. FIG. 9 is an enlarged cross-sectional view of the swing lock mechanism in which the swing is locked as viewed from the front and rear direction, showing from the center C in the width direction to the outer edge in the width direction. Correspond. First, the schematic configuration and operation of the rocking lock mechanism will be described.

  With reference to FIG. 2 and FIG. 3, the basic configuration of the rocking lock mechanism will be described. The swing lock mechanism 51 includes a lock member 53 that is displaceably attached to the seat portion 11, a recess 57 that is formed in the base portion 31 and receives the lock member 53, and a spiral that urges the lock member 53 toward the recess 57. And a spring 58. The backrest 21 operates the lock member 53 according to the reclining angle.

  The recess 57 has a shape recessed upward, and engages with the lock member 53 by receiving the lock member 53 that is displaced in the vertical direction. Thereby, the seat portion 11 including the lock member 53 is restricted from moving in the front-rear direction.

  As shown in FIG. 2, in the bed state, the backrest portion 21 depresses the lock member 53 to the free position F against the urging force of the spring 58 and causes the lock member 53 to be detached from the recess 57. This allows the seat portion 11 to swing as indicated by the thick arrow.

  As shown in FIG. 3, in the chair state, the spring 58 pushes up the lock member 53 to the lock position L and engages the lock member 53 with the recess 57. As a result, the swing of the seat portion 11 is restricted.

  The backrest 21 directly contacts the lock member 53 in the chair state shown in FIG. 2 and pushes the lock member 53 downward, and is separated from the lock member 53 in the chair state shown in FIG. Only. The lock member that is displaced according to the reclining angle of the backrest portion 21 can be realized by other configurations described below, and the lock member may always be in sliding contact with the member on the backrest portion 21 side.

  Next, the structure of each part of the rocking lock mechanism will be described in detail with reference to FIG. As shown in FIGS. 6 and 8, the swing lock mechanism 51 further includes a cam 52 provided on the backrest 21. The cam 52 of this embodiment is formed on the outer side surface of the backrest side wall 23 in the width direction. Alternatively, as a modification not shown, the cam 52 may be provided at the center in the width direction of the backrest 21.

The cam 52 rotates integrally with the backrest portion 21 about the shaft 24, a radially outward arc surface 52 r centering on the shaft 24, and a protrusion formed on the arc surface and projecting radially outward. 52t. When viewed from the outside in the width direction, the cam 52 is covered with the seat side wall 13 in both the bed state and the chair state, and is not exposed to the outside. The seat side wall 13 has a larger rising dimension and front-rear dimension than the cam 52, and always covers the cam 52 at all reclining angles. The swing lock mechanisms 51 are provided on both sides of the swing bed 10 in the width direction.
FIG. 10 is a perspective view showing the state of the lock member 53 that comes into contact with the cam 52. The lock member 53 is operated by the cam 52. The lock member 53 is a movable part having a main body portion 54, an engaging portion 55 protruding from the main body portion 54 to the outside in the width direction of the swing bed 10, and a protruding portion 56 protruding upward from the main body portion 54. It is arranged below the cam 52. The main body is attached to the lower part of the seat 11 (FIG. 7). The projecting portion 56 passes through the hole 16 (FIG. 7) formed in the seat portion 11, and its tip abuts on the cam 52.

  FIG. 11 is a perspective view showing the lock member attached to the seat portion, and shows a state seen from the inner side in the width direction of the swing bed. FIG. 12 is a perspective view showing the lock member attached to the seat portion, and shows a state seen from the outside in the width direction of the swing bed.

  The main body portion 54 of the locking member 53 is disposed on the inner side in the width direction than the outer wall 17 depending from the outer end portion in the width direction of the seat portion 11. The engagement portion 55 of the lock member 53 has a rectangular parallelepiped shape that is long in the vertical direction and short in the front-back direction when viewed from the outside in the width direction of the swing bed 10. And the engaging part 55 penetrates the long hole 18 formed in the outer side wall 17 of the seat part 11, and protrudes to the width direction outer side. Since the long hole 18 extending long in the vertical direction is longer than the vertical dimension of the engagement portion 55, the lock member 53 including the engagement portion 55 is guided in the vertical direction along the long hole 18.

  FIG. 13 is a perspective view for explaining a method of attaching the lock member, and shows a state seen from the lower side of the swing bed. The main body portion 54 of the lock member 53 includes a rectangular main body wall 54m facing the inner wall surface in the width direction of the outer wall 17, an upper side wall 54u rising from the upper edge of the main body wall 54m, and an upper side wall rising from the front side edge of the main body wall 54m. A front side wall 54f connected to 54u, and a rear side wall 54t rising from the rear edge of the main body wall 54m and connected to the upper side wall 54u. The front side wall 54f, the upper side wall 54u, and the rear side wall 54t are U-shaped. Constitutes a continuous wall. An engaging portion 55 is formed on the main body wall 54m. A protrusion 56 and a through hole 54h are formed in the upper side wall 54u. The shaft portion 59a of the stepped tapping screw 59 is passed through the through hole 54h from below to above, and the tip portion of the shaft portion 59a is inserted and fixed upward into the screw hole 19 formed in the seat portion 11.

  The shaft portion 59 a of the stepped tapping screw 59 passes through the spring 58. Since the outer diameter of the spring 58 is larger than the inner diameter of the through hole 54h, the upper end 58u of the spring 58 is locked to the lower surface 54ud of the upper side wall 54u. Further, since the outer diameter of the spring 58 is smaller than the outer diameter of the head portion 59n of the stepped tapping screw 59, the lower end 58d of the spring 58 is locked to the head portion 59n. As a result, the spring 58 is contracted in the vertical direction between the head portion 59n of the stepped tapping screw 59 that is a member on the seat portion 11 side and the upper side wall 54u of the lock member 53. The spring 58 urges the lock member 53 upward.

  Due to the urging force of the spring 58, the protrusion 56 of the lock member 53 is always in contact with the cam 52, and while the cam 52 is rotating, the tip of the protrusion 56 is an arc surface 52r (FIG. 8) or a protrusion 52t (FIG. 6). ).

  FIG. 14 is a perspective view in which the seating surface and the outer wall of the seat portion are removed from FIG. 11, and shows the positional relationship among the cam 52, the lock member 53, and the recess 57. Referring also to FIGS. 7 and 9, the base 31 has a partition wall 33 that is disposed on the outer side in the width direction than the outer wall 17 of the seat portion 11, faces the outer wall 17, and extends in the front-rear direction and the vertical direction. The partition wall 33 partitions the outer space in the width direction and the inner space in the width direction, and the inner wall surface in the width direction of the partition wall 33 includes a recess 36 that extends in the front-rear direction and receives the engaging portion 55, and an upper edge of the recess 36. And a downward curved surface 32 extending in the front-rear direction above the engaging portion 55. The curved surface 32 is formed such that the center in the front-rear direction swells below the front end and the rear end, and the curvature of the curved surface 32 is equal to the curvature of the track surface 34. A concave portion 57 that is recessed upward is formed in the center of the curved surface 32 in the front-rear direction. When the rolling element 14 naturally stops at the center in the front-rear direction of the raceway surface 34 and the seat portion 11 is in the natural stop position, the recess 57 faces the engaging portion 55 at the same position in the front-rear direction.

  In the bed state, the cam 52 pushes down the lock member 53, and the engaging portion 55 of the lock member 53 is released from the recess 57, whereby the swing lock mechanism 51 is released. As a result, the seat portion 11 is allowed to swing. While the seat portion 11 swings in the front-rear direction, the engaging portion 55 reciprocates in the front-rear direction below the curved surface 32.

  In the chair state, the seat portion 11 returns to the natural stop position, and the engaging portion 55 of the lock member 53 faces the concave portion 57 of the base portion 31 at the same position in the front-rear direction. The lock member 53 is urged upward by the spring 58 and the upper end of the engaging portion 55 is engaged with the concave portion 57, so that the swing lock mechanism 51 locks the swing of the seat portion 11.

  By the way, according to the swing bed 10 of the present embodiment, the seat portion 11, the backrest portion 21 that is connected to the seat portion 11 and can adjust the reclining angle from the chair state to the bed state, and the seat portion 11 are swingably supported. And a swing lock mechanism 51 that allows or restricts the swing of the seat portion 11. The rocking lock mechanism 51 includes a lock member 53 that is provided on the seat portion 11 and is displaced according to the reclining angle of the backrest portion 21, and a concave portion 57 that is formed on the base portion 31 and receives the lock member 53. The lock member 53 is detached from the recess 57 in the bed state to allow the seat portion 11 to swing, and the lock member 53 is engaged with the recess 57 in the chair state to restrict the swing of the seat portion 11. .

  Thereby, if a guardian raises the backrest part 21 and makes it a chair state (FIG.3, FIG.8, FIG.9), the seat part 11 will be automatically locked so that it may not rock | fluctuate. On the other hand, if the guardian tilts the backrest portion 21 backward to place it in the bed state (FIGS. 2, 6, and 7), the seat portion 11 is automatically swingable. Therefore, even if the guardian is conscious of not operating the swing lock mechanism, the seat portion 11 is automatically disabled in the chair state.

  Further, according to the present embodiment, the rocking lock mechanism 51 further includes the cam 52 that rotates in conjunction with the reclining angle, and the lock member 53 is slidably contacted with the cam 52. Thereby, the lock member 53 can be displaced according to the rotation angle of the cam 52.

  Further, according to this embodiment, the backrest portion 21 is connected to the seat portion 11 via the shaft 24 extending in the width direction, the reclining angle is adjusted around the shaft 24, and the cam 52 is coaxial with the shaft 24. The backrest portion 21 is provided. Thereby, the cam 52 rotates integrally with the backrest part 21, and the rocking | fluctuation lock mechanism 51 can be operated according to a reclining angle.

  Further, according to the present embodiment, the backrest portion 21 includes the backrest surface 22 formed in the center region in the width direction and the backrest side walls 23 formed on both sides in the width direction and rising from the backrest surface 22. As shown in FIG. 10, the cam 52 is disposed outside the backrest side wall 23 in the width direction. Thereby, the cam 52 can be hidden from the infant held on the backrest surface 22, which is advantageous in terms of safety.

  Further, according to the present embodiment, the seat portion 11 includes the seat surface 12 formed in the center region in the width direction, and the seat side walls 13 that are formed on both sides in the width direction and rise from the seat surface 12. 11, the backrest side wall 23 is disposed on the inner side in the width direction than the seat side wall 13, and the cam 52 is provided on the outer side surface in the width direction of the backrest side wall 23 and covered with the seat side wall 13 as shown in FIG. . Thereby, the contact part of the cam 52 and the lock member 53 is arrange | positioned between the backrest side wall 23 and the seat side wall 13, and it can hide so that the rocking | fluctuation lock mechanism 51 may not be exposed outside. Therefore, it is possible to prevent danger such as finger filling.

  Further, according to the present embodiment, the base portion 31 has the partition wall 33 that partitions the width direction outer space and the width direction inner space, and the recess 57 of the rocking lock mechanism 51 is formed on the width direction inner wall surface of the partition wall 33. The lock member 53 of the rocking lock mechanism 51 is disposed on the inner side in the width direction than the partition wall 33. Thereby, the engaging part of a locking member and a recessed part can be hidden inside the width direction of a base part so that it may not expose outside, and it is advantageous on safety.

  Further, according to the present embodiment, either the base portion 31 or the seat portion 11 has a pair of curved track surfaces 34 extending in the front-rear direction on both sides in the width direction, and the other remaining base portion 31 and the seat portion 11. Has a rolling element 14 that rolls along the raceway surface 34, and the seat 11 swings relative to the base portion 31 as the rolling element 14 reciprocates on the raceway surface 34. Thereby, if thrust is not given to the seat part 11, the seat part 11 will be automatically returned to a natural stop position, and the lock member 53 and the recessed part 57 can be made into the same position in the front-back direction. Therefore, it is possible to easily engage the recess 57 simply by pushing the lock member 53 upward.

  Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The swing bed according to the present invention is advantageously used in a childcare apparatus.

  DESCRIPTION OF SYMBOLS 10 Swing bed, 11 Seat part, 12 Seat surface, 13 Seat side wall, 14 Rolling body, 15 axis | shaft, 17 Outer side wall, 18 Long hole, 19 Screw hole, 21 Backrest part, 22 Backrest surface, 23 Backrest side wall, 24 axis , 31 Base part, 32 Curved surface, 33 Partition wall, 34 Track surface, 35 Bump part, 36 Recess, 41 Leg part, 51 Swing lock mechanism, 52 Cam, 52r Arc surface, 52t Projection part, 53 Lock member, 54 Main body Part, 54h through hole, 55 engaging part, 56 projecting part, 57 recessed part, 58 spring, 59 stepped tapping screw 66 foot rest part.

Claims (7)

A seat part, a backrest part connected to the seat part and capable of adjusting a reclining angle from a chair state to a bed state, a base part for swingably supporting the seat part, and swinging of the seat part are permitted or restricted. And a rocking lock mechanism that
The rocking lock mechanism includes a lock member that is provided on the seat portion and is displaced according to a reclining angle of the backrest portion, and an engagement portion that is formed on the base portion and engages with the lock member. In the bed state, the lock member is detached from the engaging portion to allow the seat portion to swing, and in the chair state, the lock member is engaged with the engaging portion to swing the seat portion. A rocking bed configured to regulate.   The swing bed according to claim 1, wherein the swing lock mechanism further includes a cam that rotates in conjunction with the reclining angle, and the lock member is slidably contacted with the cam. The backrest part is connected to the seat part via an axis extending in the width direction, and a reclining angle is adjusted around the axis,
The rocking bed according to claim 2, wherein the cam is provided on the backrest portion so as to be coaxial with the shaft. The backrest portion has a backrest surface formed in the center region in the width direction, and a backrest side wall formed on both sides in the width direction and rising from the backrest surface,
The rocking bed according to claim 3, wherein the cam is disposed on the outer side in the width direction of the backrest side wall. The seat portion has a seat surface formed in the center region in the width direction, and a seat side wall formed on each side in the width direction and rising from the seat surface,
The backrest side wall is disposed on the inner side in the width direction than the seat side wall,
The rocking bed according to claim 4, wherein the cam is provided on an outer side surface in the width direction of the backrest side wall and covered with the seat side wall.   The base portion has a partition wall that partitions the width direction outer space and the width direction inner space, and the engagement portion of the swing lock mechanism is formed on the inner wall surface in the width direction of the partition wall. The rocking bed according to any one of claims 1 to 5, wherein the lock member is disposed on the inner side in the width direction than the partition wall. One of the base part and the seat part has a pair of curved raceway surfaces extending in the front-rear direction on both sides in the width direction, and the other remaining part of the base part and the seat part rolls along the raceway surface. The rocking bed according to claim 1, further comprising: a rolling element that reciprocates on the raceway surface, wherein the seat rocks with respect to the base part.

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