JP2012055584A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guide a correct way of sitting regarding a chair including a tiltable seat.SOLUTION: The chair includes: a seat member 1 for supporting a sitting person; a seat base 2 for supporting the seat member 1; a tilting means 3 provided between the seat base 2 and the seat member 1, for tilting the seat member 1 in a biased direction when a sitting position is biased from a preset position; an energizing means 4 provided between the seat base 2 and the seat member 1, for energizing the seat member 1 so as to be in a non-tilted attitude; and a sensing means 5 for stimulating the sitting person or changing a feeling given to the sitting person linked with the tilting of the seat member 1 to sense the tilting of the seat member 1.

Description

  The present invention relates to a chair. More particularly, the present invention relates to a chair having a tiltable seat.

  Conventionally, there is a chair that can tilt the seat. This chair is shown in FIG. This chair is provided with a universal joint 107 between a support plate 103 fixed to a seat frame 102 of a chair frame 101 and a seat portion 104, and supports the seat portion 104 so as to be tiltable. The chair frame 101 is formed by bending a pipe, and a leg 105 and a backrest 106 are integrally formed.

  If you use this chair, the seat 104 will tilt if you do not sit in the correct position, so it is customary to recognize the displacement of the sitting position by being aware of the tilt of the seat 104, and sit in the correct position by sitting back correctly It is possible to turn on.

JP 2006-68223 A

  However, in the above-described chair, there is a case where the inclination of the seat portion 104 is not noticed. In particular, the seated person is less likely to notice the tilt of the seat 104 when he / she is concentrated on work or has become accustomed to the chair by sitting for a long time. If the seated person is not aware of the inclination of the seat 104, he / she will not be aware of the deviation of his / her sitting position and cannot acquire the habit of sitting correctly.

  An object of the present invention is to provide a position where a seated person can sense the inclination of the seat without being particularly aware of the inclination of the seat.

  In order to achieve such an object, the chair according to claim 1 is provided between a seat member that supports a seated person, a seat base that supports the seat member, and the seat base and the seat member, and a seating position is set in advance. Tilting means for tilting the seat member in a biased direction when biased from the position, biasing means provided between the seat base and the seat member for biasing the seat member so as not to tilt, and a seat Sensing means for sensing the tilt of the seat member by stimulating the seat occupant in conjunction with the tilt of the member or changing the feel given to the seat occupant.

  Therefore, when the seated person sits at a position deviated from the correct position of the seat member (a position set in advance as a correct seat position), the tilting means tilts the seat member in the bias direction. The sensing means is displaced or deformed in conjunction with the tilting, and the seat member is tilted by changing the feeling of giving (contacting or pushing) a part of the seated person's body or giving to the seated person. Sense. When the seated person stands up and the load acting on the seat member disappears, the tilted seat member is returned to the non-tilted posture by the biasing member. On the other hand, when the seated person sits at the correct position of the seat member, the seat member does not tilt. Therefore, the sensing means does not change the feeling of giving a stimulus to the worker or giving it to the seated person.

  Further, in the chair according to claim 2, the sensing means displaces a part of the backrest forward. Therefore, a part of the backrest is displaced forward in conjunction with the swing of the seat member, and the seated person's back is stimulated. Thereby, the seated person senses the swing of the seat member.

  In the chair according to claim 3, the sensing means bulges the bulging portion provided on the backrest toward the front. Therefore, the bulging portion bulges forward in conjunction with the swinging of the seat member and stimulates the seated person's back. Thereby, the seated person senses the swing of the seat member.

  Further, in the chair according to claim 4, when the tilting of the seat member includes a component in the right direction, the right side portion of the backrest is displaced forward, and when the tilting of the seat member includes a component in the left direction, the backrest is detected. The left side portion is displaced forward. Therefore, with respect to the left-right direction (width direction) of the chair, the direction of tilting of the seat member can coincide with the direction of the position where the seated person receives a stimulus from the sensing means.

  Further, in the chair according to claim 5, the sensing means has a connection point with the seat base as a fulcrum, a connection point with the seat member as a power point, and a connection point with the backrest as an action point. It has the link which advances. Therefore, when the seat member tilts, the link swings, and a part or the front part of the backrest is displaced or deformed.

  According to a sixth aspect of the present invention, there is provided a tilt prevention means for preventing the seat member from tilting backward between the seat base and the seat member. Therefore, the seat member can be prevented from tilting backward.

  Further, in the chair according to claim 7, the sensing means partially changes the easiness of bending when the flexible backrest is bent and leaned. Therefore, the feeling when leaning on the backrest is interlocked with the swing of the seat member, and the stimulus given to the seated person is changed. Thereby, the seated person senses the swing of the seat member.

  According to the chair of the first aspect, the sensing means stimulates the seat occupant or changes the feeling given to the seat occupant in conjunction with the tilting of the seat member. It is possible to detect a shift in the sitting position. Therefore, the seated person can be guided so as to sit correctly.

  Here, like the chair according to claim 2, the sensing means may be configured to displace a part of the backrest forward, and like the chair according to claim 3, the sensing means may be a bulge provided on the backrest. The protruding portion may be bulged forward.

  According to the chair of the fourth aspect, with respect to the left-right direction (width direction) of the chair, the tilting direction of the seat member can coincide with the direction (side) of the position where the seated person receives the stimulus from the sensing means. Therefore, even if the seated person is not particularly conscious, the seated position can be passively sensed.

  According to the chair of the fifth aspect, the sensing means can be operated by swinging the link, so that the operation of the sensing means can be further ensured.

  Further, according to the chair of the sixth aspect, the seat member can be prevented from tilting backward, so that the seat member does not tilt backward and surprises the seated person, and the usability is further improved. Can be made. Further, since the operation of the sensing means can be prevented when leaning on the backrest, the usability of the chair can be further improved from this point.

Further, as in the chair according to the seventh aspect, the sensing means may partially change the ease of bending when the flexible backrest is bent.

It is a side view of the state which shows 1st Embodiment of the chair of this invention, and the seat member is not tilting. It is a rear view which shows the backrest and seat of the chair of FIG. It is sectional drawing which shows the seat of the chair of FIG. It is a top view of the chair of FIG. It is a side view of the state which shows 1st Embodiment of the chair of this invention and the seat member inclines to the left. It is sectional drawing which shows the seat of the chair of FIG. It is a side view of the state which shows 2nd Embodiment of the chair of this invention, and the seat member is not tilting. It is sectional drawing which shows the seat of the chair of FIG. It is a top view of the chair of FIG. It is a side view of the state which shows 1st Embodiment of the chair of this invention and the seat member inclines to the left. It is sectional drawing which shows the seat of the chair of FIG. It is a side view of the state which shows 3rd Embodiment of the chair of this invention, and the seat member is not tilting. It is a rear view which shows the backrest and seat of the chair of FIG. It is sectional drawing which shows the seat of the chair of FIG. It is a top view of the chair of FIG. It is a side view of the state which shows the chair of FIG. 12 and the seat member inclines to the left. It is a rear view which shows the backrest and seat of the chair of FIG. It is sectional drawing which shows the seat of the chair of FIG. It is a top view of the chair of FIG. It is a side view of the state which shows 4th Embodiment of the chair of this invention, and the seat member is not tilting. It is a rear view which shows the backrest and seat of the chair of FIG. It is sectional drawing which shows the seat of the chair of FIG. It is a top view of the chair of FIG. It is a side view of the state which shows the chair of FIG. 20 and the seat member inclines to the left. It is a rear view which shows the backrest and seat of the chair of FIG. It is sectional drawing which shows the seat of the chair of FIG. It is a top view of the chair of FIG. It is a top view of the chair which abbreviate | omitted the tilt prevention means. It is a side view of the conventional chair.

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

  1 to 6 show a first embodiment of the chair of the present invention. The chair is provided between a seat member 1 that supports a seated person, a seat base 2 that supports the seat member 1, and between the seat base 2 and the seat member 1, and is biased when the seating position deviates from a preset position. Tilting means 3 for tilting the seat member 1 in the direction, a biasing means 4 provided between the seat base 2 and the seat member 1 for biasing the seat member 1 so as not to tilt, and a seat member Sensing means 5 is provided for sensing the tilt of the seat member 1 by stimulating the seated person in conjunction with the tilting of the seat 1 or changing the feeling given to the seated person.

  In the present embodiment, the backrest 6 is a plate-like backrest 6 having flexibility, and two horizontal slits 7 are provided in the substantially vertical center so as to bend easily. The space between the two slits 7 projects most forward in the vertical direction. Further, the substantially central portions in the vertical direction on both sides of the backrest 6 are partially cut off to form a swing plate 8 which is a separate member. The left and right rocking plates 8 have inner side edges connected to the backrest body 6a by hinges 9, and can be swung so that the outer side edges are turned forward. The swing plate 8 is a constituent member of the sensing means 5. The upper part of the backrest body 6 a is supported by a pair of left and right support arms 11 attached to the back support rod 10, and the lower part is connected to the seat base 2 by second links 12 at both sides thereof.

  The seat of the chair is composed of a seat base 2 and a seat member 1. The seat base 2 is supported by the seat receiving member 14 supported by the legs 13 and the back support rod 10 supported by the seat receiving member 14 to constitute a so-called synchro-rocking mechanism that interlocks the movement of the seat and the back. ing. In addition, the seat member 1 of the present embodiment has a configuration in which the cushion material 16 is mounted on the support plate 15 so as to overlap. The seat member 1 is supported on the seat base 2 by a tilting means 3 and a biasing means 4 so as to be tiltable. Between the seat base 2 and the seat member 1, a tilting means 3 and a biasing means 4 are disposed, and a space 17 that allows the seat member 1 to tilt is provided.

  The tilting means 3 is provided at a position where the center of gravity of the seated person acts when the seated person sits at the correct position of the seat member 1. Here, the correct position is a position set as a position where the seated person should sit when the chair is designed. When the seated person sits at the set correct position, the balance is achieved and the seat member 1 does not tilt, but when the seated person sits at a position deviated from the correct position, the balance is lost and the seat member 1 tilts. To do. In the present embodiment, the tilting means 3 is provided at a position corresponding to the center of the seat member 1. However, the position of the seat member 1 is not limited to this, and can be appropriately set as long as the seat member 1 balances when the seated person sits at the correct position.

  In this embodiment, a universal joint is used as the tilting means 3. However, the seat member 1 is not limited to a universal joint, and may be a pivot bearing, a ball joint, or the like, or may be supported so as to be tiltable by using deformation of an elastic body such as a coil spring or a rubber block. There is no particular limitation as long as it can be tiltably supported. In the present embodiment, the two swinging central axes of the universal joint are arranged in the front-rear direction and the left-right direction. However, the arrangement is not limited to this.

  The maximum angle at which the seat member 1 can tilt is appropriately set in consideration of, for example, sitting comfort. For example, 3 degrees. However, this is not the case.

  When the tilting means 3 is a universal joint, a pivot bearing, a ball joint, or the like, if one side of the seat member 1 is lowered due to tilting, the opposite side is raised. It is called movement. For example, tilting to the left side means a movement in which the left side of the seat member 1 is lowered and the right side is raised. On the other hand, when the tilting means 3 uses deformation of an elastic body, even if one side is lowered by tilting, the opposite side does not move so much up or down. In such a case, focusing on the operation on one side, which is the side that is greatly lowered, is called rocking. For example, tilting to the left side means a movement in which the left side of the seat member 1 is greatly lowered with respect to the right side and the right side is lowered or raised, that is, a movement that sinks to the left side.

  The urging means 4 supports the seat member 1 so as not to swing. In the present embodiment, since the posture of the seat member 1 not swinging is a horizontal posture, the biasing means 4 biases the seat member 1 to be horizontal. However, it is not always necessary to support the seat member 1 so as to be horizontal. For example, the seat member 1 may be supported so as to tilt slightly forward (tilt forward) or tilt backward (tilt backward). That is, the seat member 1 may be tilted in a state where the weight of the seated person is not applied.

  In the present embodiment, a coil spring is used as the biasing means 4. However, the spring is not limited to the coil spring, and other springs may be used. When the seated person stands up and the seated person's load acting on the seat member 1 disappears, the seat member 1 can be returned to the horizontal position. If it is a thing, it will not restrict | limit in particular. For example, four coil springs are provided and arranged corresponding to the four corners of the seat member 1. However, the number of coil springs is not necessarily limited to four. The spring seat on the seat member 1 side of the coil spring is attached to the support plate 15, and the spring seat on the seat base 2 side is attached to the support arm 2 a provided on the seat base 2. The coil spring is provided along the vertical direction.

  In the present embodiment, since the seat base 2 is smaller than the seat member 1 in the plan view, support arms 2a are provided at the four corners of the seat base 2, and biasing means is provided between the support arm 2a and the seat member 1. By providing 4, the urging means 4 is arranged at the four corners of the seat.

  The strength of the urging force of the urging means 4 is, for example, in a state where the chair is not used or in a state where the seating member 1 is balanced even if the seating position is used, even if a slight external force is applied. When the seat 1 is not tilted and the seating position is deviated from the correct position, the strength is set such that the seat member 1 can tilt. However, this is not always necessary. For example, the strength of the urging force may be weak, and specifically, the urging force may be such that the seat member 1 tilts when receiving an external force.

  The biasing means 4 also functions as a stopper that determines the maximum tilt angle of the seat member 1. That is, the seat member 1 can be tilted until the deformation amount of the biasing means 4 reaches the limit. However, the biasing means 4 does not necessarily function as a stopper, and a stopper may be provided separately from the biasing means 4.

  The sensing means 5 is provided on each of the left and right sides of the chair. The sensing means 5 displaces a part of the backrest 6 forward. In the present embodiment, a part of the backrest 6 is displaced forward by allowing the swinging plate 8 of the backrest 6 to swing back and forth.

  Further, the sensing means 5 of the present embodiment has a connection point with the seat base 2 as a fulcrum 18, a connection point with the seat member 1 as a force point 19, a connection point with the backrest 6 as an action point 20, It has a link 21 that swings about the fulcrum 18 and moves the action point 20 forward by descending. The points 18, 19, and 20 are arranged in the order of the force point 19, the fulcrum 18, and the action point 20 from the lower end to the upper end. In this embodiment, the link 21 is substantially L-shaped, and a force point 19 is provided at the lower end of the link 21, a fulcrum 18 is provided near the force point 19, and an action point 20 is provided at the upper end. Therefore, when the force point 19 is lowered by the swing of the seat member 1, the action point 20 moves forward and swings the swing plate 8 forward. That is, when the tilting of the seat member 1 includes a component in the right direction, the sensing means 5 displaces the right side portion (the right swing plate 8) of the backrest 6 forward and includes a component in the left direction. For this, the left side of the backrest 6 (left swing plate 8) is displaced forward. Further, since the distance between the fulcrum 18 and the action point 20 is larger than the distance between the force point 19 and the fulcrum 18, the swing plate 8 is swung larger than the tilt distance of the seat member 1. Can do.

  In the present embodiment, the force point 19 of the link 21 is swingably connected to the fixture 22 fixed to the bottom surface of the seat member 1, and the fulcrum 18 of the link 21 swings to the tip of the arm 23 provided on the seat base 2. An action point 20 of the link 21 is slidably connected to a fixture 24 that is movably connected and fixed to the back surface of the oscillating plate 8. The center axis of the swing of each 18, 19, and 20 points is along the left-right direction of the chair.

  The seat member 1 on the side opposite to the tilting direction is lifted, and the link 21 swings in the opposite direction to the above, and the swinging plate 8 swings backward. Since there is usually enough space after 8, this is not a problem.

  Further, between the seat base 2 and the seat member 1, tilt prevention means 29 for preventing the seat member 1 from tilting backward is provided. The tilt prevention means 29 is, for example, a convex portion provided in the space 17 between the seat base 2 and the seat member 1, and a member having a small horizontal dimension of the chair is provided at the rear of the tilt means 3, that is, in the center in the horizontal direction. ing. By providing a member having a small size in the left-right direction at the center in the left-right direction, the seat member 1 can be prevented from tilting rearward and can be tilted in the left-right direction and the front direction. In the present embodiment, the plate-like tilt preventing means 29 is arranged along the front-rear direction. However, the tilt preventing means 29 is not limited to this configuration. For example, a plurality of rod-like members may be arranged along the front-rear direction after the tilting means 3 or one rod-like member may be arranged after the tilting means 3. It may be arranged. In the present embodiment, the tilting means 3 is attached to the seat member 1, but may be attached to the seat base 2.

  When the seat member 1 tries to tilt backward, the seat member 1 hits the tilt preventing means 29, so the seat member 1 cannot swing backward. Thereby, the seat member 1 does not tilt backward and surprises the seated person, and usability can be further improved.

  Further, by providing the tilt prevention means 29, the seat member 1 can be prevented from tilting backward when the seat 6 is leaned on the backrest 6 and relaxed, and the operation of the sensing means 5 can be prevented. That is, since the sensing means 5 can be prevented from operating when the backrest 6 is used, the chair using the backrest 6 is preferably provided with the tilt prevention means 29.

  Next, the operation of the sensing means 5 will be described. When the chair is not used, the seat member 1 is balanced or urged by the urging means 4 and is horizontal (FIG. 3). Therefore, the left and right sensing means 5 are not activated.

  When the chair is used in this state, that is, when the user is seated, a load is applied to the seat member 1. If the seated position of the seated person is correct and the seated person's posture is also correct, the seat member 1 balances and does not tilt. Therefore, the left and right sensing means 5 do not operate.

  On the other hand, if the seating position is deviated or the seated person is in a bad posture even if the seating position is correct, the seat member 1 is out of balance and tilted. Here, the case where the seating position is shifted to the left side will be described as an example (FIG. 6). Since the seat member 1 tilts to the left side, the left rocking plate 8 is displaced forward by the rocking of the left link 21. Then, it touches and pushes the back of the seated person (two-dot chain line position in FIG. 4, FIG. 5). That is, the left sensing means 5 is activated to stimulate the left side of the seated person's back. That is, when the seated person is leaning on the backrest 6, the swing plate 8 pushes the back of the seated person forward, and when the seated person is not leaning on the backrest 6, the swinging plate 8 is Touch the back and push forward. Thereby, the seated person can passively sense that the seating position is shifted to the left side. A seated person who senses a shift in the seating position corrects the seating position correctly. In addition, when a seated person's sitting posture is bad, it senses similarly and a seated person corrects a posture. As described above, the chair of the present invention can guide the seated person to perform the correct sitting.

  The right side of the seat member 1 is lifted by tilting to the left, and the link 21 of the right sensing means 5 swings in the opposite direction to the link 21 of the left sensing means 5. For this reason, the right rocking plate 8 is swung rearward. However, since there is usually a sufficient space after the rocking plate 8, there is no particular problem.

  Then, when the seated person stands up and the load acting on the seat member 1 disappears, the seat member 1 that has been tilted is returned to the non-tilt posture by the biasing means 4. As a result, the operation of the sensing means 5 is released and the original position is restored.

  Even when the tilting direction of the seat member 1 includes not only the horizontal component of the chair but also the forward component, the sensing means 5 is activated by the horizontal component.

  In the above description, the left swing plate 8 is swung by the left link 21 and the right swing plate 8 is swung by the right link 21, but the present invention is not limited to this. Instead, the left swing plate 8 may be swung by the right link 21 and the right swing plate 8 may be swung by the left link 21.

  Next, a second embodiment of the chair of the present invention will be described. In addition, the same code | symbol is attached | subjected about the same member as the member of the chair of FIG. 1, and those description is abbreviate | omitted. The chair of this embodiment differs from the chair of the first embodiment in the sensing means 5.

  The chair of this embodiment is shown in FIGS. The sensing means 5 of this embodiment bulges the bulging part 25 provided in the backrest 6 toward the front. The bulging portion 25 is, for example, an air bag, and the bulging portion 25 of the front side of the backrest 6, specifically, the bulging portion 25 of the left side sensing means 5 is bulged by the left side of the backrest 6. The portions 25 are respectively provided on the right side portions of the backrest 6. Further, in the present embodiment, the installation height of the bulging portion 25 is set to approximately the center of the backrest 6 in the vertical direction. However, the installation height of the bulging portion 25 is not necessarily limited to the approximate center of the backrest 6 in the vertical direction, and is not particularly limited as long as it can stimulate the seated person by bulging.

  The bulging portion 25 communicates with an air pump 27 through a tube 26. The air pump 27 is disposed in the space 17 between the seat base 2 and the seat member 1, the air pump 27 of the left sensing means 5 is on the left side, and the air pump 27 of the right sensing means 5 is on the right side. Is provided. In the present embodiment, the air pump 27 is fixed to the seat base 2, but may be fixed to the support plate 15 of the seat member 1.

  The tube 26 that communicates the bulging portion 25 and the air pump 27 is disposed at a position that does not interfere with the use of the chair, for example, on the back surface of the backrest 6, and is fixed by a fixing tool (not shown).

  Next, the operation of the sensing means 5 will be described. In a state where the sensing means 5 is not operated, that is, in a state where air is not sent into the bulging portion 25 by the air pump 27, the bulging portion 25 is deflated and thinly folded (the positions of the solid lines in FIGS. 7 and 9). ).

  From this state, when the seat member 1 is tilted, for example, to the left side by use of the chair, the left air pump 27 is sandwiched between the seat member 1 and the seat base 2 and is crushed. (FIG. 11). As a result, the left bulge portion 25 bulges forward and stimulates the left side portion of the back of the seated person (the position of the two-dot chain line in FIG. 9, FIG. 10). That is, the seated person is stimulated on the left side of the back by the operation of the left sensing means 5 and can passively sense that the seating position is shifted to the left side.

  The right side of the seat member 1 is lifted by swinging to the left side. However, since the air pump 27 is not fixed to the seat member 1, the right side of the seat member 1 is lifted away from the right air pump 27, and the right side. The bulging portion 25 does not swell.

  When the seated person corrects the seating position, the seat member 1 balances and returns to the horizontal position, so that the shape of the left air pump 27 that has been crushed is restored. At this time, the left air pump 27 sucks back the air in the left bulging portion 25, so that the left bulging portion 25 that has been swollen is deflated and thinly folded. That is, the operation of the left sensing means 5 is released. Since the seated person does not receive the stimulus from the bulging portion 25 by releasing the operation, it can be sensed that the seating position is correct. Similarly, when the seated posture of the seated person is bad or when the seated position is shifted to the right side, the seated person corrects the seated position or the seated position. As described above, in the chair according to the present embodiment as well, the seated person can be guided so as to perform the correct sitting as in the chair according to the first embodiment.

  In the above description, air is used to inflate the bulging portion 25, but the fluid to be used is not limited to air. For example, a fluid such as gel or liquid may be used.

  In the above description, the bulging portion 25 is attached to the backrest 6, but the mounting position of the bulging portion 25 is not limited to the backrest 6, and any position that can stimulate the seated person is particularly useful. Not limited. For example, the bulging portion 25 may be provided on the upper surface of the cushion material 16 of the seat member 1.

  In the above description, the left bulge 25 is inflated with the left air pump 27 and the right bulge 25 is inflated with the right air pump 27. However, the present invention is not limited to this. The bulging portion 25 may be inflated with the right air pump 27, and the right bulging portion 25 may be inflated with the left air pump 27.

  Next, a third embodiment of the chair of the present invention will be described. In addition, the same code | symbol is attached | subjected about the same member as the member of the chair of FIG. 1, and those description is abbreviate | omitted. The chair of the present embodiment is different from the chair of the first embodiment in that the swinging plate 8 is not provided on the backrest 6.

  The chair of this embodiment is shown in FIGS. The sensing means 5 of the present embodiment provides the seated person in conjunction with the tilting of the seat member 1 by partially changing the ease of bending when the flexible backrest 6 is bent and leaned. The feeling is changed to sense the tilt of the seat member 1. In this embodiment, since the swing plate 8 is not provided on the backrest 6, the action point 20 of the link 21 of the sensing means 5 is directly connected to the backrest 6, and a part of the backrest 6 is used as the sensing means 5.

  The link 21 of the right sensing means 5 is connected to the right side of the backrest 6, and the link 21 of the left sensing means 5 is connected to the left side of the backrest 6. In the present embodiment, the connection point is provided at the substantially central height in the vertical direction of the backrest 6 (the height connected to the swing plate 8 in FIG. 1). However, the height of the connection point is not limited to this. In this embodiment, the action point 20 of the link 21 is swingably connected to the fixture 24 fixed to the back surface of the backrest 6. The central axis of the swing of the connection is along the left-right direction of the chair.

  When the link 21 is swung by the tilting of the seat member 1 and the action point 20 moves forward to partially push out the backrest 6 and bend it, the backrest 6 becomes difficult to bend when the seated person leans. That is, since the feeling when leaning on the backrest 6 changes, the seated person can sense the tilt of the seat member 1.

  For example, when the seating position is shifted to the left side, the seat member 1 tilts to the left side, so that the link 21 of the left sensing means 5 displaces the left side portion of the backrest 6 forward and the link of the right sensing means 5. 21 displaces the right side of the backrest 6 backward. Therefore, the backrest 6 is bent so as to be twisted to the right side, and the ease of bending when it is leaned is different from the case where it is not bent, and the feeling when bending is different. Further, since the backrest 6 itself is also deformed, the feeling when leaning is different. Therefore, the seated person can passively sense that the seating position is shifted to the left side.

  When the seat member 1 is tilted to the right side, the backrest 6 bends so as to be twisted to the left side, that is, the twisting direction is different, so that the seated person can sense the direction of displacement of the seating position.

  As described above, also in the chair of the present embodiment, the seated person can be guided so as to perform the correct sitting as in the above-described chair.

  In the above description, the left side portion of the backrest 6 is displaced by the left link 21 and the right side portion of the backrest 6 is displaced by the right link 21, but the present invention is not necessarily limited to this, and the backrest 6 The left side portion of the backrest 6 may be displaced by the right link 21, and the right side portion of the backrest 6 may be displaced by the left link 21.

  Next, a fourth embodiment of the chair of the present invention will be described. In addition, the same code | symbol is attached | subjected about the same member as the member of the chair of FIG. 3, and those description is abbreviate | omitted. The chair of this embodiment differs in the link 28 of the sensing means 5 from the chair of the third embodiment.

  The chair of this embodiment is shown in FIGS. The link 28 of this embodiment is shorter than the link 21 of the third embodiment, and the lower part of the backrest 6 is displaced up and down. That is, the action point 20, which is the connection point with the backrest 6, is raised by the lowering of the force point 19, which is the connection point with the seat member 1.

  The link 28 of the right sensing means 5 is connected to the lower right portion of the backrest 6, and the link 28 of the left sensing means 5 is connected to the lower left portion of the backrest 6. In this embodiment, the action point 20 of the link 28 is swingably connected to the fixture 24 fixed to the back surface of the backrest 6. The central axis of the swing of the connection is along the left-right direction of the chair.

  In this embodiment, since the link 28 of the sensing means 5 is connected to the lower part of the backrest 6, the second link 12 connecting the lower part of the backrest 6 required in the third embodiment to the seat base 2. Is omitted.

  When the link 28 is swung by the tilting of the seat member 1 and the action point 20 is raised and the backrest 6 is partially pushed up and bent, the backrest 6 becomes difficult to bend when the seated person leans. That is, since the feeling when leaning on the backrest 6 changes, the seated person can sense the tilt of the seat member 1.

  For example, when the seating position is shifted to the left side, the seat member 1 tilts to the left side. Therefore, the link 28 of the left sensing means 5 displaces the left side portion of the backrest 6 upward to move the center portion (two in the vertical direction). The portion that protrudes most forward in the vertical direction between the slits 7) projects forward, and the link 28 of the right sensing means 5 displaces the right side of the backrest 6 downward so that the center in the vertical direction is rearward. Withdraw. Therefore, the backrest 6 is bent so as to be twisted to the right side, and the ease of bending when it is leaned is different from the case where it is not bent, and the feeling when bending is different. Further, since the backrest 6 itself is also deformed, the feeling when leaning is different. Therefore, the seated person can passively sense that the seating position is shifted to the left side.

  When the seat member 1 is tilted to the right side, the backrest 6 bends so as to be twisted to the left side, that is, the twisting direction is different, so that the seated person can sense the direction of displacement of the seating position.

  As described above, also in the chair of the present embodiment, the seated person can be guided so as to perform the correct sitting as in the above-described chair.

  In the above description, the left side of the backrest 6 is displaced by the left link 28, and the right side of the backrest 6 is displaced by the right link 28. However, the present invention is not limited to this, and the backrest 6 The left side portion of the backrest 6 may be displaced by the right link 28, and the right side portion of the backrest 6 may be displaced by the left link 28.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

  For example, in the above description, a chair (rocking chair) having a synchro-rocking mechanism is taken as an example, but a chair to which the present invention can be applied is not limited to a rocking chair. For example, a chair (so-called fixed chair) that does not connect the back support rod 10 and the seat base 2 and does not transmit the movement of the backrest 6 to the seat base 2 may be used.

  Moreover, although the above-mentioned chair was provided with the tilt prevention means 29, the tilt prevention means 29 does not need to be provided. An example of a chair not provided with the tilt prevention means 29 is shown in FIG. By omitting the tilt prevention means 29, it is possible to tilt backward, and the seat member 1 can be tilted in any direction of 360 degrees. For example, when a fixed chair is used without using the backrest 6 so much, the seat member 1 can be tilted 360 degrees in any direction without providing the tilt prevention means 29, and the seating position can be shifted backward. You may make it make a seated person sense. When the seat member 1 is tilted backward, the entire rear part of the seat member 1 is lowered, so that the left and right sensing means 5 are simultaneously operated to allow the seated person to sense the tilt backward. That is, when both the left and right sensing means 5 are activated, the seated person can sense a backward tilt.

  In the above description, the tilting means 3 allows the seat member 1 to tilt in any direction of 360 degrees. However, the tilting means 3 does not necessarily need to be able to tilt in any direction of 360 degrees. It may be possible to tilt only in the width direction. In this case, it is possible to make the seated person sense a shift of the sitting position in the left direction or the right direction.

  In the above description, the sensing means 5 uses the swinging of the links 21 and 28 and the fluid pressure to stimulate the seated person or change the feeling given to the seated person. However, the present invention is not limited to this. For example, the seating person may be stimulated by electric means or the feeling given to the seating person may be changed. For example, a switch that is turned on when the seat member 1 is tilted, and an actuator such as a motor or a pump that displaces the swing plate 8, a part of the backrest 6, and the bulging portion 25 by a predetermined time by a switch operation Alternatively, the actuator may be actuated by electrical, vibration, temperature, air volume, or other means to stimulate the seated person or change the feeling given to the seated person.

  In the above description, the slit 7 is provided in the backrest 6. However, if the backrest 6 can be sufficiently bent without providing the slit 7, the slit 7 may not be provided.

DESCRIPTION OF SYMBOLS 1 Seat member 2 Seat base 3 Tilt means 4 Energizing means 5 Sensing means 6 Backrest 25 Bumping part 18 Support point 19 Power point 20 Action point 21, 28 Link 29 Tilt prevention means

Claims (7)

  A seat member that supports a seated person, a seat base that supports the seat member, and a seat base that is provided between the seat base and the seat member, and in a direction that is biased when the seating position deviates from a preset position. Tilting means for tilting, biasing means provided between the seat base and the seat member for biasing the seat member so as not to tilt, and interlocking with tilting of the seat member A chair comprising sensing means for sensing the tilt of the seat member by stimulating the seated person or changing a feeling given to the seated person.   The chair according to claim 1, wherein the sensing means displaces a part of the backrest forward.   The chair according to claim 1, wherein the sensing means bulges a bulging portion provided on a backrest toward the front.   The sensing means displaces the right side of the backrest forward when the tilt of the seat member includes a rightward component, and forwards the left side of the backrest forward when it includes a leftward component. The chair according to claim 1, wherein the chair is displaced.   The sensing means includes a link that uses a connection point with the seat base as a fulcrum, a connection point with the seat member as a force point, a connection point with a backrest as an action point, and advances the action point by lowering the force point. The chair according to claim 1, further comprising:   The chair according to claim 1, further comprising a tilt prevention means for preventing the seat member from tilting backward between the seat base and the seat member.   The chair according to claim 1, wherein the sensing means partially changes the ease of bending when the flexible backrest is bent.

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