Chair back and seat

Abstract

The utility model provides a chair back and a seat, the chair back comprises a back supporting piece and rib side supporting pieces on the left side and the right side of the back supporting piece, and each rib side supporting piece is connected with a corresponding driving piece; the rib side supporting pieces are driven by the driving pieces to act, the opening degree between the rib side supporting pieces on the two sides of the back supporting piece is adjusted, the distance between the two rib side supporting pieces is adjustable, and the clamping and supporting effects are achieved on the rib sides of sitting persons of different body types. The novel chair back is directly or indirectly connected to the chair seat, on the premise that the distance between the rib side supporting pieces is adjustable, a user can freely adjust the supporting positions of the rib side supporting pieces, then effective supporting can be formed on the two sides of the ribs of children or adults of different body types, the application range of the seat is widened, and the sitting experience feeling of the seat is improved.

Description

Technical Field

[0001] The utility model relates to the field of chairs, in particular to a chair back and a seat. Background Art

[0002] The existing seats on the market include seats for adults, such as office chairs, and seats for children, such as study chairs. Many of these seats do not take into account how to correct the user's sitting posture, so side supports are not provided on the seats. Fig. 9 For example, due to the lack of side support, when a user sits on this type of chair, it is easy for the user to fall left or right. After falling, the user's sitting posture has changed. Maintaining this sitting posture for a long time will cause the user to have health problems such as scoliosis.

[0003] In order to correct the sitting posture of the occupant, some chairs will be provided with corresponding rib side support members on the left and right sides of the chair back, so that the chair can fully support the ribs of the occupant, and can also prevent the occupant from falling to the sides of the chair due to sitting for a long time, so as to achieve the purpose of correcting the sitting posture; for example, in the patent of the backrest chair with announcement number CN206714499, the upper and lower parts of the single-sided chair back are connected and transitioned by a waist clamp, and the waist clamp spirally rises counterclockwise from bottom to top. The waist clamp can effectively support the side position of the waist and play a role in correcting the sitting posture, but the waist clamp in the patent is fixed and the support position cannot be adjusted. Therefore, it is difficult to be used by adults with different body shapes or children in different developmental states.

[0004] In the seat elastic mechanism with announcement number CN209769729, a bracket is connected to the rear position of the main chair part, and an elastic body is connected to the bracket, and one end of the elastic body is connected to the bracket and the other end is connected to the support body; when the user leans back, the connecting arm will be driven to rotate backward, and the support body will compress the compression spring. When the user's waist and back move forward, the elastic force of the compression spring pushes the support body to move forward tightly in accordance with the waist and back of the human body, so that the human body can be supported by the support body in different postures; this elastic structure set up based on the principle of lever can produce a corresponding waist clamping effect according to the user's sitting force, so it is suitable for users of different body shapes to sit; but the waist clamping of the support body needs to rely on the pressure generated by the user's back leaning backward to be realized, and the user cannot always be in a posture close to the backrest on the seat. When the user moves his body slightly on the seat, the support body will separate from the user's body, resulting in the limited effect of the elastic structure on the correction of the human body's sitting posture. Summary of the invention

[0005] In order to solve the above-mentioned technical problems, the purpose of the utility model is to provide a chair back, which drives the rib side support members to move through corresponding driving members, adjusts the opening and closing degree between the rib side support members on both sides of the back support member, and then changes the size of the leaning space, so that the distance between the two rib side support members can be adjusted to form a clamping support effect on the rib sides of occupants of different body shapes.

[0006] A seat is further provided, in which a chair back is arranged on the seat, and under the premise that the distance between the rib side supports is adjustable, the seated person can freely adjust the supporting position of the rib side supports, thereby effectively supporting both sides of the ribs of children or adults of different body shapes, thereby improving the application range of the seat and the sitting experience.

[0007] The technical solution of the utility model is achieved in this way:

[0008] A chair back, comprising:

[0009] a back support configured to support a back;

[0010] The rib side support members are used to support the two sides of the ribs; the rib side support members are symmetrically arranged on the left and right sides of the back support member, and the portions of the rib side support members on both sides that extend forward beyond the front surface of the back support member have clamping surfaces, and the clamping surfaces of the rib side support members on both sides are arranged facing each other; so that a leaning space is formed between the clamping surfaces of the two rib side support members and the front surface of the back support member;

[0011] A driving member, acting on a corresponding rib side support member;

[0012] The driving member can drive the corresponding rib side support members to move, so that the two rib side support members move closer or farther away from each other, thereby adjusting the size of the leaning space; and after the adjustment, the corresponding rib side support members stay at the corresponding position and remain in place.

[0013] Preferably, the rear end of the rib side support is rotatably connected to the back support along the left-right direction. When the driving member drives the rib side support, the rear end of the rib side support rotates along the left-right direction, so that the rib side support members on both sides of the back support member are closer to or farther away from each other; the design of the rotational connection is simple and efficient, so that the rib side support member can rotate and change the supporting distance between itself and the rib side position of the human body, so that the rib side support member forms a stable support for the rib side position.

[0014] Preferably, the left and right sides of the back support are provided with connecting ears extending forward, and the connecting ears are located on the outside of the rib side support members; one end of the driving member is supported by the connecting ears, and the other end of the driving member is interlaced with the rib side support members through the screw rod and nut principle, so that when the driving member rotates, the rib side support members are forced to rotate left or right; the screw rod and nut matching method is simple and efficient, and can drive the rib side support members to rotate to the specified position, and then form a self-locking effect through the matching structure of the screw rod and nut, so that the rib side support members stay in the corresponding position.

[0015] Preferably, it also includes a back bracket, and the back support member is connected to the back bracket; both sides of the back bracket are provided with connecting ears extending outward, and the connecting ears are located outside the rib side support member; one end of the driving member is supported by the connecting ears, and the other end of the driving member is interlaced with the rib side support member through the principle of screw rod and nut, so that when the driving member rotates, the rib side support member is forced to rotate left or right. The screw rod and nut matching method is simple and efficient, and after the rib side support member is driven to rotate to the specified position, a self-locking effect is formed through the matching structure of the screw rod and nut, so that the rib side support member stays in the corresponding position.

[0016] Preferably, the driving member and the rib side support member are threadedly matched at the insertion position; the driving member is a screw rod arranged between the connecting ear and the rib side support member, the rib side support member is provided with a push-pull member, and the push-pull member is provided with a screw hole; the screw rod and the screw hole of the push-pull member are spirally matched; the push-pull member is connected to the rib side support member by rotating in the left-right direction and is circumferentially fixed with the screw rod; a handle is connected to the end of the screw rod away from the rib side support member; the handle is turned and the screw rod is driven to rotate circumferentially along its own axis, so that the push-pull member slides along the axis direction of the screw rod and pushes and pulls the rib side support member to rotate in the left-right direction. The design of the handle driving the screw rod is simple and labor-saving, and is easy to operate; when the handle is turned, the push-pull member can provide another rotation support point for the rib side support member while pushing and pulling the rib side support member, so as to prevent the screw rod from getting stuck when driving the rib side support member.

[0017] Preferably, the rib side support member includes a main body and a cover shell arranged on the main body, the push-pull member is a spherical body installed in the cover shell, at least one of the upper and lower ends of the spherical body is flattened and formed with a first plane, and a second plane corresponding to the position is provided on the inner wall of the cover shell, and the second plane is in contact with the first plane; the spherical body occupies a small volume and has a simple structure; and the contact between the first plane and the second plane can enable the spherical body to remain circumferentially fixed with the screw while rotating left and right, thereby driving the rib side support member to move.

[0018] Preferably, an avoidance groove is provided on the rib side support, the width of the avoidance groove is greater than the diameter of the screw, the screw passes through the avoidance groove and is screwed into the screw hole on the push-pull member; when the rib side support rotates along the left and right directions, the avoidance groove avoids the screw, preventing interference or collision between the screw and the rib side support.

[0019] Preferably, the cover shell comprises a first shell and a second shell, the second shell is integrally formed on the rib side support, and the first shell is connected to the first shell by screws to install the spherical body in the cover shell.

[0020] Preferably, the rear end of the rib side support is integrally formed with the back support, and the rib side support is elastic; when the driving member drives the rib side support, the rib side support swings in the left and right directions and generates elastic deformation, so that the two rib side supports are closer to or farther away from each other; the integrated elastic design is simple and efficient, so that the rib side support can be elastically deformed and change the support distance between itself and the rib side position of the human body, so that the rib side support forms a stable support for the rib side position.

[0021] Preferably, the rib side support member swings to the left or to the right at an angle ranging from 10° to 20°.

[0022] Preferably, the middle position of the front end of the rib side support member is arched forward, so that the front end contour of the rib side support member forms an arch structure; in this way, the rib side support member forms a forward convex portion at the position of the arch structure, and the forward convex portion can adapt to the shape of the front arch of the human lumbar spine, so that the rib side support member and the rib side portion have sufficient contact area, thereby forming effective support for the two sides of the lumbar spine at the side.

[0023] Preferably, an outer contour line is formed on the front side of the rib side support member, and the outer contour line is divided into an upper contour line and a lower contour line with the middle position of the front end of the rib side support member as the boundary. The upper contour line extends from the upper end of the rib side support member to the forward and downward direction, and the lower contour line extends from the lower end of the rib side support member to the forward and upward direction and intersects with the upper contour line to form the arch structure, so that the entire outer contour line is in the shape of a parabola protruding forward; the protruding parabola shape is consistent with the human lumbar vertebrae curve, so that the rib side support member can fit the human lumbar vertebrae curve and form a more comprehensive support for the rib side.

[0024] Preferably, the front-to-back length range of the rib side support is 10cm-20cm; when the user sits down, the rib side support in this length range provides reasonable support for the rib side support position, and when the user needs to stand up, the rib side can also quickly detach from the rib side support, thereby improving the sitting experience.

[0025] Preferably, the rib side support members are connected with side support cushions for supporting the ribs; the side support cushions can provide soft support for the rib side positions, thereby improving the sitting comfort.

[0026] A seat comprises a seat support and a chair back, wherein the back support is directly or indirectly connected to the rear end of the seat support.

[0027] The beneficial effects of the utility model using the above technical solution are:

[0028] The utility model provides a chair back and a seat, compared with the prior art:

[0029] The rib side support members on the left and right sides of the back support member are connected to corresponding driving members, so that the rib side support members can move under the action of the driving members, so that the seated person can adjust the size of the leaning space according to his or her own body shape until the rib side support members form a stable support for the rib side; when sitting, the seated person does not need to lean back closely against the chair back, and the rib side support members on the chair back can also form a stable support for the rib side position of the seated person; in addition, when the seated person moves his or her body slightly on the seat, the rib side support members driven into place by the driving member will also be close to the rib side position, so that the seat can always form a comprehensive and effective sitting posture correction effect on the rib side position; this design allows the seat to adapt to children or adults of different body shapes, thereby improving the applicability of the seat and the sitting experience.

[0030] The driving member and the rib side support member are interlaced with each other through the principle of the screw rod and nut. The driving member can rotate and make the rib side support member move into place to form a self-locking effect through the principle of the screw rod and nut, so that the rib side of the seated person can get stable support when leaning on the rib side support member, and a poor sitting posture will not occur due to the displacement of the rib side support member.

[0031] Each rib side support is provided with a corresponding driving member for driving adjustment. When one rib side support is adjusted, the supporting position of another rib side support will not change, so that the seated person can adjust the position of the rib side support according to his or her own sitting posture, thereby improving the applicability of the seat.

[0032] The rib side support member of the utility model clamps the ribs of the human body, that is, clamps the chest and waist sides of the human body. Compared with simply clamping the waist position, it has a better supporting effect on the human body and is more conducive to maintaining a centered sitting posture, so that the spine can remain upright.

[0033] If the rib side supports are adjusted by rotation, the two rib side supports can be in an open state in the initial state, that is, a shape with a large front opening and a narrow rear end is formed between the two rib side supports. In this way, when the human body leans back, it is easy to guide and will not be hit by the front end of the rib side supports; and when the user needs to leave the seat during use, it is easier to get out by moving forward.

[0034] The front-to-back length range of the rib side support is 10cm-20cm, the height of the rib side support is between 25-45cm, and the middle position of the front end of the rib side support is arched forward, so that overall, the rib side support can play a lateral support role without protruding too forward, and has better coordination with the back support and stronger aesthetics. When the rib side support is in a fully opened state, it can move backward closer to the plane where the back support is located, which can eliminate the abruptness. It looks like the back support has just been widened, forming a whole with the back support, and does not destroy the overall beauty of the back support. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is an enlarged view of the inner side of the chair back;

[0036] Figure 2 This is an exploded view of the chair back;

[0037] Figure 3 It is an enlarged view of a partial cutaway of the rib side support member position;

[0038] Figure 4 This is a schematic diagram of the structure of the seat after the backrest cushion and side support cushions are installed;

[0039] Figure 5a It is a schematic diagram of the structure in which two rib side supports are spread outwards;

[0040] Figure 5b It is a schematic diagram of the structure in which two rib side supports are closed inwards;

[0041] Figure 6 This is a schematic diagram of the structure in which the connecting ears are arranged on the back support in Example 2;

[0042] Figure 7 A schematic diagram of a user sitting on a seat;

[0043] Figure 8 A side view of a user sitting on the seat;

[0044] Fig. 9 A schematic diagram of a user leaning to the left or right side when sitting down in the background technology;

[0045] Fig.10 It is a schematic diagram showing that the outer contour line of the front side of the rib side support is consistent with the lumbar curve of the human body;

[0046] The figures are marked as follows: 1-back support, 2-rib side support, 3-seat support, 4-screw, 5-blocking piece, 6-back bracket, 7-rotating shaft, 11-support, 12-connecting ear, 13-back cushion, 14-side support cushion, 21-cover, 22-avoidance groove, 23-spherical body, 24-screw hole, 25-protective cover, 211-first shell, 212-second shell, 213-second plane, 231-first plane. DETAILED DESCRIPTION

[0047] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0048] In the description of the present invention, the term "at least one" refers to one or more than one, unless otherwise clearly defined. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0050] The utility model has multiple implementation modes, and the specific implementation modes are as follows:

[0051] Example 1: Figure 1-5b , Figure 7-8 , Fig.10 As shown, this embodiment provides a chair back, comprising:

[0052] A back support 1 configured to support the back;

[0053] The rib side support members 2 are used to support the two sides of the ribs; the rib side support members 2 are symmetrically arranged on the left and right sides of the back support member 1, and the portions of the rib side support members 2 on both sides that extend forward beyond the front surface of the back support member 1 have clamping surfaces, and the clamping surfaces of the rib side support members 2 on both sides are arranged facing each other; so that a leaning space is formed between the clamping surfaces of the two rib side support members 2 and the front surface of the back support member 1;

[0054] A driving member, acting on the corresponding rib side support member 2;

[0055] The driving member can drive the corresponding rib side support member 2 to move, so that the two rib side support members 2 are moved closer or farther away from each other, thereby adjusting the size of the leaning space; and after the adjustment, the corresponding rib side support member 2 stays at the corresponding position and remains in place.

[0056] Further, if Figure 1-3 As shown, in order to enable the rib side support member 2 to move left and right, the rear end of the rib side support member 2 is rotationally connected to the back support member 1 along the left and right directions; specifically, two supports 11 spaced apart from each other are provided on the left and right sides of the back support member 1, and a corresponding rotating connection portion is provided on the rib side support member 2, and a rotating shaft 7 is passed between the support 11 and the rotating connection portion to rotationally connect the two; when the driving member drives the rib side support member 2, the rear end of the rib side support member 2 rotates along the left and right directions, so that the rib side support members 2 on both sides of the back support member 1 are closer to or farther away from each other; the design of the rotating connection is simple and efficient, so that the rib side support member 2 can rotate and change the supporting distance between itself and the rib side position of the human body, so that the rib side support member 2 forms a stable support for the rib side position.

[0057] Furthermore, the rib side support members 2 are adjusted by rotation so that in the initial state, the two rib side support members 2 are in an open state, that is, a shape with a large front opening and a narrow rear end is formed between the two rib side support members 2. In this way, when the human body leans back, it is easy to guide and will not be hit by the front end of the rib side support member 2; and when the user needs to leave the seat during use, it is easier to get out by moving forward.

[0058] Furthermore, each rib side support member 2 is driven by a corresponding driving member. After driving the rib side support member 2 to a predetermined position, the driving member should also keep the rib side support member 2 in a stable supporting state to prevent the rib side support member 2 from shifting. Specifically, the driving member acts on the corresponding rib side support member 2 in this way: connecting ears 12 extending forward are provided on both sides of the back support member 1, and the connecting ears 12 are located on the outside of the rib side support member 2; one end of the driving member is supported by the connecting ear 12, and the other end of the driving member is interlaced with the rib side support member 2 through the principle of a screw rod and a nut, so that when the driving member rotates, the rib side support member 2 is forced to rotate left or right; the screw rod and the nut are matched in a simple and efficient manner, and after driving the rib side support member 2 to rotate to a specified position, a self-locking effect is formed through the matching structure of the screw rod and the nut, so that the rib side support member 2 stays in the corresponding position; and each driving member can drive and adjust the corresponding rib side support member 2 individually, so that the occupant can make individual adjustments according to his or her own sitting needs, thereby improving the applicability of the seat.

[0059] Further, if Figure 1-3 As shown, in order to make the adjustment process of the rib side support member 2 smooth and not stuck, the driving member and the rib side support member 2 are threadedly matched at the insertion position; the driving member is a screw rod 4 arranged between the connecting ear 12 and the rib side support member 2, and the rib side support member 2 is provided with a push-pull member, and the push-pull member is provided with a screw hole 24; the push-pull member is connected to the rib side support member 2 by rotating in the left and right directions, and is circumferentially fixed with the screw rod 4; the screw rod 4 is spirally matched with the screw hole 24 of the push-pull member; a handle 41 is connected to the end of the screw rod 4 away from the rib side support member 2; the handle 41 is turned to drive the screw 4 to rotate circumferentially along its own axis, so that the push-pull member slides along the axial direction of the screw 4 and pushes and pulls the rib side support member The side support 2 rotates along the left and right directions; the design of the handle 41 driving the screw 4 is simple and labor-saving, and is easy to operate; and since the rear end of the rib side support 2 is rotatably connected to the back support 1, the movement process of the rib side support 2 is a rotation process, not a translation process. If the push-pull member is directly fixed on the rib side support 2, the rib side support 2 will be stuck with the screw 4 during rotation. Therefore, the push-pull member rotatably connected to the rib side support 2 can provide a rotation support point for the rib side support while pushing and pulling the rib side support 2, thereby preventing the screw 4 from getting stuck when driving the rib side support 2, and thus the rib side support 2 can be quickly adjusted into place.

[0060] Further, if Figure 3As shown, considering that the cost and occupied space of the push-pull member should be within a reasonable range, the push-pull member has a simple structure and occupies a small space. It is arranged on the rib side support member 2 as follows: the rib side support member 2 includes a main body 2a and a cover shell 21 arranged on the main body 2a, and the push-pull member is a spherical body 23 installed in the cover shell 21. At least one of the upper and lower ends of the spherical body 23 is flattened and formed with a first plane 231. The inner wall of the cover shell 21 has a second plane 213 corresponding to the position, and the second plane 213 is in contact with the first plane 231. Specifically, the cover shell 21 has an arc surface in contact with the outer surface of the spherical body 23, and the spherical body 23 can be in contact with the arc surface and rotate left and right. When the screw When the rod 4 is inserted and fitted into the screw hole 24 of the spherical body 23, the spherical body 23 is equivalent to a rotation support point on the rib side support member 2. When the rear end of the rib side support member 2 rotates, the rib side support member 2 also rotates around the spherical body 23 in the horizontal plane; and when the first plane 231 and the second plane 213 located at the upper and lower ends of the spherical body 23 are fitted together, it is equivalent to limiting the freedom of the spherical body 23 to rotate circumferentially with the screw 4, so that the spherical body 23 is restricted from rotating circumferentially in the cover shell 21. When the screw 4 rotates circumferentially along the axis in the left and right directions, the spherical body 23 cannot rotate with the rotation of the screw 4, and can only be forced to slide along the axis direction of the screw 4 and drive the rib side support member 2 to move left and right.

[0061] Furthermore, rotating the handle 42 can cause the screw 4 to rotate in place and drive the rib side support 2 to rotate, but the rib side support 2 will produce an angle change relative to the screw 4 when it rotates. Therefore, in order to ensure smooth adjustment of the rib side support 2, an avoidance groove 22 is provided on the rib side support 2. The width of the avoidance groove 22 is greater than the diameter of the screw 4. The screw 4 passes through the avoidance groove 22 and is spirally engaged in the screw hole 24 on the push-pull member; in this way, when the rib side support 2 rotates in the left and right directions, the avoidance groove 22 will avoid the screw 4 to prevent the screw 4 from interfering or colliding with the rib side support 2.

[0062] Furthermore, in order to facilitate the disassembly and assembly of the spherical body 23, the cover shell 21 includes a first shell 211 and a second shell 212. The second shell 212 is integrally formed on the rib side support member 2. The first shell 211 is connected to the first shell 211 by screws to install the spherical body 23 in the cover shell 21.

[0063] Furthermore, in order to make the appearance of the chair back simple, a protective cover 25 is provided on the opposite side of the cover shell 21 on the rib side support 2, and the avoidance groove 22 passes through the protective cover 25. The protective cover 25 is connected to the rib side support 2 by screws, and covers the cover shell 21 and the spherical body 23 in the cover shell 21 from the outside of the chair back.

[0064] Furthermore, in order to make the rib side support member 2 fit the rib side of the seated person as closely as possible, the middle position of the front end of the rib side support member 2 is arched forward, so that the front end contour of the rib side support member forms an arch structure; in this way, the rib side support member 2 forms a forward convex portion at the position of the arch structure, and the forward convex portion can adapt to the shape of the front arch of the human lumbar spine, so that the rib side support member 2 has sufficient contact area with the rib side, thereby forming effective support for the two sides of the lumbar spine from the side.

[0065] Further, if Fig.10 As shown, the human body's lumbar vertebrae partially bends forward and forms a lumbar vertebrae curve, and the lumbar vertebrae curve is a parabolic shape that protrudes forward. In order to make the rib side support member 2 fit the lumbar vertebrae curve and form support for the rib side, an outer contour line is formed on the front side of the rib side support member 2. The outer contour line is divided into an upper contour line and a lower contour line with the middle position of the front end of the rib side support member 2 as the boundary. The upper contour line extends from the upper end of the rib side support member 2 to the front and bottom direction, and the lower contour line extends from the lower end of the rib side support member 2 to the front and upward and intersects with the upper contour line to form the arch structure, so that the entire outer contour line is in a parabolic shape that protrudes forward. The outer contour line on the front side of the rib side support member 2 imitates the curve of the human lumbar vertebra so that it can coincide with the human lumbar vertebrae curve when supporting the rib side position of the human body, so that the rib side support member 2 can fit the human lumbar vertebrae curve and form a more comprehensive support for the rib side.

[0066] Furthermore, the upper section of the outer contour line extends from the upper end of the rib side support 2 toward the front and bottom and forms a slope structure extending toward the front and bottom; the slope structure can enhance the sitting experience; specifically, when a person is sitting, the upper end of the rib side support 2 is between the arm and the rib side, if the rib side support 2 is not provided with a slope structure, the upper end of the rib side support 2 will interfere with the rib side support 2 when the arm moves, affecting the sitting experience, and the rib side support 2 with a slope structure, while supporting the rib side, is equivalent to cutting off the part of the rib side support 2 that interferes with the arm, thereby avoiding the above-mentioned interference problem.

[0067] Furthermore, considering the actual support range and adjustment range of the rib side support 2, the angle range of the rib side support 2 to the left or right is 10°-20°; the front-to-back length range of the rib side support 2 is 10cm-20cm, and when the user sits down, the rib side support 2 in this length range provides reasonable support for the rib side support position, and when the user needs to stand up, the rib side can also quickly detach from the rib side support 2, thereby improving the sitting experience.

[0068] Furthermore, the front-to-back length range of the rib side support member 2 is 10cm-20cm, which means that the length from the rear end of the rib side support member 2 to the middle arched position of the front end is 10cm-20cm, and the height of the rib side support member 2 is between 25-45cm, which means that the length range of the upper and lower ends of the rib side support member 2 is between 25-45cm; on the whole, the reasonable front-to-back length and the upper and lower lengths enable the rib side support member 2 to play a lateral supporting role without protruding too far forward, and to have better coordination with the back support member 1 and a stronger aesthetic feeling. When the rib side support member 2 is in a fully opened state, it can move backward closer to the plane where the back support member 1 is located, thereby eliminating the abrupt feeling, and it looks like the back support member 1 has only been widened to form a whole with the back support member 1 without destroying the overall beauty of the back support member 1.

[0069] Furthermore, the screw rod 4 includes a spiral section with a spiral groove and a smooth section without a spiral groove, and the handle 42 is connected to the end of the smooth section; there are scale lines (not shown) on the rod body of the smooth section, and when the handle 42 is turned to adjust the rib side support 2, the user can adjust the supporting position of the rib side support 2 to the correct position by visually observing the scale lines.

[0070] Further, if Figure 4 As shown, in order to ensure the comfort of the chair back, the rib side support member 2 is connected with a side support cushion 14 for supporting the ribs; the side support cushion 14 can form a soft support for the rib side position to enhance the sitting comfort; and a backrest cushion 13 is connected to the front surface of the back support member 1, and the backrest cushion 13 and the side support cushion 14 are integrally formed, so that when the occupant sits, his back and rib side position can be flexibly supported.

[0071] A seat is further provided, comprising a seat support 3 and a chair back, wherein a back support 1 is directly or indirectly connected to the rear end of the seat support 3; specifically, the seat 3 and the back support 1 can be connected in various ways, wherein the back support 1 can be directly connected to the rear end of the seat 3, or a corresponding support can be provided at the rear end of the seat 3, and then the back support 1 is connected to the support, so that the back support 1 is indirectly connected to the rear end of the seat 3.

[0072] like Figure 7-8 As shown, when an adult or a child sits on the seat, by turning the handles 41 on both sides of the chair back, the rib side supports 2 on both sides of the chair back will support the user's rib sides, so that both sides of the ribs of the adult or child will be clamped between the rib side supports 2, thereby playing a role in maintaining a correct sitting posture.

[0073] Example 2: Figure 6As shown, the difference between this embodiment and the above embodiment is that the seat in this embodiment also includes a back bracket 6, and the back support member 1 is connected to the back bracket 6; the left and right sides of the back bracket 6 are provided with connecting ears 12 extending outward, and the connecting ears 12 are located on the outside of the rib side support member 2; one end of the driving member is supported by the connecting ear 12, and the other end of the driving member is interlaced with the rib side support member 2 through the principle of a screw rod and a nut, so that when the driving member rotates, the rib side support member 2 is forced to rotate to the left or right; the setting position of the connecting ear 12 in this embodiment is changed, and the same effect as in the above embodiment can also be achieved.

[0074] Embodiment 3: This embodiment is different from the above embodiments in that the rear end of the rib side support member 2 in this embodiment is integrally formed with the back support member 1, and the rib side support member 2 is elastic; when the driving member drives the rib side support member 2, the rib side support member 2 swings in the left and right directions and generates elastic deformation, so that the two rib side support members 2 are closer to or farther away from each other; the integrated elastic design is simple and efficient, so that the rib side support member 2 can be elastically deformed and change the support distance between itself and the rib side position of the human body, so that the rib side support member 2 forms a stable support for the rib side position; in this embodiment, the rear end of the rib side support member 2 is no longer rotatably connected to the back support member 1, but is integrally formed with the back support member 1 and is elastic. When the driving member rotates, the rib side support member 2 can generate elastic deformation and change the support position to achieve the same effect as in the above embodiments.

[0075] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A chair back, characterized in that: include: A back support member (1) configured to support the back; The rib side support members (2) are used to support the two sides of the ribs; the rib side support members (2) are symmetrically arranged on the left and right sides of the back support member (1); the portions of the rib side support members (2) on both sides that extend forward beyond the front surface of the back support member (1) have clamping surfaces; the clamping surfaces of the rib side support members (2) on both sides are arranged facing each other; a leaning space is formed between the clamping surfaces of the two rib side support members (2) and the front surface of the back support member (1); A driving member, acting on a corresponding rib side support member (2); The driving member can drive the corresponding rib side support member (2) to move, so that the two rib side support members (2) move closer or farther away from each other, thereby adjusting the size of the leaning space; and after the adjustment, the corresponding rib side support member (2) stays at the corresponding position and remains in place.

2. A chair back according to claim 1, characterized in that: The rear end of the rib side support member (2) is connected to the back support member (1) for rotation in the left-right direction. When the driving member drives the rib side support member (2), the rear end of the rib side support member (2) rotates in the left-right direction, so that the rib side support members (2) on both sides of the back support member (1) are moved closer to or farther away from each other.

3. A chair back according to claim 2, characterized in that: The back support member (1) is provided with connecting ears (12) extending forward on both left and right sides, and the connecting ears (12) are located outside the rib side support member (2); one end of the driving member is supported by the connecting ears (12), and the other end of the driving member is interlaced with the rib side support member (2) through the principle of a screw rod and a screw nut, so that when the driving member rotates, the rib side support member (2) is forced to rotate to the left or right.

4. The chair back according to claim 2, characterized in that: The back support (6) is also comprised of a back support member (1) connected to the back support member (6); the left and right sides of the back support member (6) are both provided with connecting ears (12) extending outwards, the connecting ears (12) being located outside the rib side support member (2); one end of the driving member is supported by the connecting ears (12), and the other end of the driving member is interlaced with the rib side support member (2) through the principle of a screw rod and a screw nut, so that when the driving member rotates, the rib side support member (2) is forced to rotate leftward or rightward.

5. A chair back according to claim 3 or 4, characterized in that: The driving member is threadedly engaged with the rib side support member (2) at the insertion position; the driving member is a screw (4) arranged between the connecting ear (12) and the rib side support member (2); the rib side support member (2) is provided with a push-pull member, and the push-pull member is provided with a screw hole (24); the push-pull member is connected to the rib side support member (2) by rotation in the left-right direction, and is circumferentially fixed with the screw (4); the screw (4) is threadedly engaged with the screw hole (24) of the push-pull member; a handle (41) is connected to one end of the screw (4) away from the rib side support member (2); the handle (41) is turned to drive the screw (4) to rotate circumferentially along its own axis, so that the push-pull member slides along the axis of the screw (4) and pushes and pulls the rib side support member (2) to rotate in the left-right direction.

6. A chair back according to claim 5, characterized in that: The rib side support member (2) comprises a body (2a) and a cover shell (21) arranged on the body (2a); the push-pull member is a spherical body (23) installed in the cover shell (21); at least one of the upper and lower ends of the spherical body (23) is flattened and formed with a first plane (231); the inner wall of the cover shell (21) has a second plane (213) at a corresponding position; the second plane (213) is in contact with the first plane (231).

7. The chair back according to claim 5, characterized in that: The rib side support member (2) is provided with an avoidance groove (22), the width of the avoidance groove (22) being greater than the diameter of the screw rod (4), the screw rod (4) passes through the avoidance groove (22) and is screw-fitted in a screw hole (24) on the push-pull member; when the rib side support member (2) rotates in the left-right direction, the avoidance groove (22) avoids the screw rod (4).

8. The chair back according to claim 6, characterized in that: The cover shell (21) comprises a first shell (211) and a second shell (212); the second shell (212) is integrally formed on the rib side support member (2); the first shell (211) is connected to the first shell (211) by screws, so that the spherical body (23) is installed in the cover shell (21).

9. The chair back according to claim 1, characterized in that: The rear end of the rib side support member (2) is integrally formed with the back support member (1), and the rib side support member (2) is elastic; when the driving member drives the rib side support member (2), the rib side support member (2) swings in the left-right direction and generates elastic deformation, so that the two rib side support members (2) move closer to or farther away from each other.

10. A chair back according to claim 2 or 9, characterized in that: The middle part of the front end of the rib side support member (2) is arched forward, so that the front end profile of the rib side support member (2) forms an arched structure.

11. A chair back according to claim 10, characterized in that: An outer contour line is formed on the front side of the rib side support member (2), and the outer contour line is divided into an upper contour line and a lower contour line with the middle position of the front end of the rib side support member (2) as the boundary. The upper contour line extends from the upper end of the rib side support member (2) in the forward and downward direction, and the lower contour line extends from the lower end of the rib side support member (2) to the forward and upward direction and intersects with the upper contour line to form the arch structure, so that the entire outer contour line presents a parabolic shape protruding forward.

12. A chair back according to claim 2 or 9, characterized in that: The front-to-back length of the rib side support member (2) ranges from 10 cm to 20 cm.

13. The chair back according to claim 1, characterized in that: The rib side support member (2) is connected to a side support cushion (14) for supporting the rib portion.

14. A seat, characterized by: The chair comprises a seat support (3) and the chair back according to any one of claims 1 to 13, wherein the back support (1) is directly or indirectly connected to the rear end of the seat support (3).

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