Waist support mechanism and seat

Abstract

The utility model provides a waist support mechanism and a seat, the waist support mechanism comprises a back support and a waist chasing assembly, the waist chasing assembly comprises an elastic piece connected with the back support and a sliding piece connected with the elastic piece; the waist rest is connected to the sliding piece capable of sliding forwards and downwards, so that the waist rest can form linkage with the sliding piece under the action of external force, the sliding piece slides forwards and downwards along with the waist rest under the elastic action of the elastic piece, follow-up elastic support is formed for the waist, and the phenomenon of'running of the waist 'is avoided. According to the seat provided by the invention, the back bracket is mounted on the back supporting frame, so that the seat has a waist chasing function of the waist supporting mechanism, the waist of a seated person is protected, and the sitting experience of the seat is improved.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to a lumbar support mechanism and a seat. Background Art

[0002] Chairs on the market usually include a seat and a backrest connected to the seat. The backrest is usually a plate-shaped member. When a user sits on the seat, the backrest is difficult to provide stable support for the waist. Therefore, in order to ensure the support effect for the waist, a lumbar support that protrudes forward and has a supporting function is provided at the lower end of the backrest. When the user sits on the seat, the lumbar support will support the user's waist, thereby avoiding the discomfort caused by the waist hanging in the air on the seat.

[0003] For example, in a seat patent with announcement number CN219895151, in order to enable the lumbar support to provide support for the waist whose position changes, a lumbar support that can be slid up and down and adjusted is provided in the seat, wherein the sliding portion of the lumbar support is slidably connected to a fixing member, the fixing member is fixedly connected to the chair back, an elastic protrusion is provided on the fixing member facing the sliding portion on one side, the elastic protrusion slides on the groove, so that after the lumbar support slides to a predetermined position, a stable support can be provided at the corresponding position of the waist, but the lumbar support only takes into account the supporting effect of the lumbar support in the upper and lower positions, but ignores the supporting effect of the lumbar support in the front and rear directions.

[0004] When the back of a person falls backward on the chair, the lumbar support and the chair back will rotate backward along the same rotation center point. However, due to the height difference between the human waist and the rotation center point of the lumbar support, the lumbar support rotates backward to a larger extent after the person falls backward, causing the lumbar support to separate from the waist in the fallen state. This is the so-called "running waist" phenomenon. When the "running waist" phenomenon occurs, the lumbar support can no longer provide support for the waist. Long-term use of this lumbar support will not only fail to improve the user experience of the chair, but will also damage the user's waist. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a lumbar support mechanism, by connecting the lumbar support to a sliding member that can slide forward and downward, so that the lumbar support can form a linkage with the sliding member under the action of an external force, so that the sliding member slides forward and downward with the lumbar support under the elastic force of the elastic member, and forms a follow-up elastic support for the waist, thereby avoiding the "waist running" phenomenon

[0006] Furthermore, a chair is provided, in which a back bracket is installed on a back support frame, so that the chair has a waist-tracking function of a lumbar support mechanism, thereby protecting the waist of the seated person and improving the sitting experience of the chair.

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

[0008] A lumbar support mechanism, comprising:

[0009] A back bracket, wherein a guide groove is provided at the lower end of the back bracket, and the guide groove extends obliquely forward and downward;

[0010] The waist-chasing assembly includes a sliding member and an elastic member, wherein the sliding member is slidably connected to the guide groove; the elastic member is connected between the sliding member and the back support and provides elastic force for the sliding member;

[0011] A lumbar support connected to the front end of the sliding member;

[0012] The lumbar support can be linked with the sliding member under the action of external force, so that the sliding member and the lumbar support can slide along the extension track of the guide groove at the same time under the elastic action of the elastic member.

[0013] Preferably, the guide groove is an arc-shaped groove extending obliquely forward and downward; the arc-shaped guide groove extending obliquely forward and downward can make the lumbar support more stable when sliding.

[0014] Preferably, the back support is provided with a receiving groove with a rear end opening, the receiving groove is connected to the guide groove front and back; the sliding member is in the receiving groove and is connected to the waist support at the front end of the back support through the guide groove. The receiving groove can provide installation space for the sliding member, so the sliding member does not need to be exposed to the outside, thereby keeping the exterior of the back support simple and beautiful.

[0015] Preferably, a first slot opening obliquely downward is provided at the bottom of the sliding member, a first snap-in opening facing the first slot is provided on the inner wall of the accommodating groove, and the elastic member is a first compression spring arranged between the first slot and the first snap-in opening; the first compression spring can be squeezed by the sliding member and form an elastic force on the sliding member.

[0016] Preferably, a cover plate for covering the opening of the accommodating groove is provided at the rear end of the back support; the cover plate can isolate the sliding part in the accommodating groove to prevent debris from entering.

[0017] Preferably, it also includes an elastic support component arranged between the back support and the lumbar support, the elastic support component includes a mounting piece connected to the sliding piece; a connecting part corresponding to the position of the mounting piece is provided at the lower end of the lumbar support, and the lower end of the connecting part is rotatably connected to the mounting piece; thereby, a rotation point is formed by the lumbar support relative to the mounting piece, so that after the lumbar support is subjected to the backward supporting force of the back, it can more easily form a linkage with the sliding piece.

[0018] Preferably, an elastic connector is provided between the upper end of the connecting part and the mounting part, and the elastic connector is a second compression spring that can be elastically deformed forwards and backwards; the second compression spring can use its own elastic deformation to enable the lumbar support to provide elastic support for the waist in the forward and backward directions, thereby enhancing the supporting effect of the lumbar support mechanism.

[0019] Preferably, the sliding member and the mounting member are connected by screws passing through the guide groove along the front-to-back direction; the guide groove provides sliding space for the sliding member and also provides installation space between the sliding member and the mounting member. This design is simple and ingenious, achieving two goals at one stroke.

[0020] Furthermore, a seat is provided, comprising a lumbar support mechanism and a back support frame, wherein the back support frame is installed at the front end of the back support frame.

[0021] The principle and beneficial effects of the utility model using the above technical solution are:

[0022] The purpose of the utility model is to provide a lumbar support mechanism, which connects the lumbar support to a sliding member that can slide forward and downward, so that the lumbar support can form a linkage with the sliding member under the action of an external force, so that the sliding member drives the lumbar support to slide forward and downward, and the lumbar support after sliding will form a follow-up elastic support for the waist due to the elastic force generated by the elastic member, thereby avoiding the occurrence of the "running waist" phenomenon.

[0023] A chair is further provided, in which a back bracket is installed on a back support frame, so that the chair has a waist-tracking function of a lumbar support mechanism. When the occupant leans back backward, the back bracket and the back support frame will rotate backward, and the lumbar support will form an elastic support for the waist forward when rotating with the back bracket, thereby protecting the occupant's waist and improving the sitting experience of the chair. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the structure of the seat;

[0025] Figure 2 is an enlarged view of the location of the receiving groove of the back support;

[0026] Figure 3 is an enlarged view of the components in the receiving tank;

[0027] Figure 4 It is an enlarged cross-sectional view of the lumbar support mechanism;

[0028] Figure 5 A schematic diagram of the opening of the cover plate installation receiving groove;

[0029] Figure 6 This is an enlarged view of the structure of the elastic support assembly at the front end of the back support;

[0030] Figure 7 It is a structural schematic diagram of the guide groove at the lower end of the back support;

[0031] Figure 8 It is a structural schematic diagram of the installation parts;

[0032] Fig. 9 This is a schematic diagram of the structure of the mounting parts from another angle;

[0033] Fig.10 is a schematic diagram of the structure of the sliding member;

[0034] The figures are marked as follows: 1-back support, 2-lumbar support, 3-sliding member, 4-first compression spring, 5-second compression spring, 6-rotating shaft, 7-mounting member, 8-back support frame, 11-guide groove, 12-first bayonet, 13-accommodating groove, 14-cover plate, 21-connecting part, 22-card column, 31-first card slot, 32-positioning slot, 33-through hole, 71-rotating shaft hole, 72-second bayonet, 73-screw hole, 74-positioning block. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] The specific implementation methods of the utility model are as follows:

[0039] like Figure 1-10 As shown, this embodiment provides a waist support mechanism, including:

[0040] The back support 1 is usually connected to the back of the seat; a guide groove 11 is provided at the lower end of the back support 1, and the guide groove 11 extends obliquely forward and downward; the guide groove 11 is symmetrically arranged at the lower end of the back support;

[0041] The waist-chasing assembly includes a sliding member 3 and an elastic member, wherein the sliding member 3 is slidably connected to the guide groove 11; the elastic member is connected between the sliding member 3 and the back support 1, and provides an elastic force for the sliding member 3 when the sliding member 3 slides;

[0042] A lumbar support 2 is connected to the front end of a sliding member 3;

[0043] When the waist presses the lumbar support 2 backward, the lumbar support 2 will be subjected to an external force. The lumbar support 2 can be linked with the sliding member 3 under the action of the external force, so that the sliding member 3 and the lumbar support 2 slide along the extension track of the guide groove 11 at the same time under the elastic action of the elastic member. After sliding, the lumbar support 2 will form a follow-up elastic support for the waist due to the elastic force generated by the elastic member, thereby avoiding the occurrence of the "running waist" phenomenon.

[0044] Further, if Figure 7 As shown, if the guide groove 11 is a straight line extending forward and downward, the lumbar support 2 will slide too fast, resulting in an unstable sliding of the lumbar support 2. Therefore, in order to make the lumbar support 2 slide more smoothly along the guide groove 11, the guide groove 11 is an arc-shaped groove extending obliquely forward and downward; the arc-shaped guide groove 11 extending obliquely forward and downward can make the trajectory of the lumbar support 2 when sliding close to a circle, thereby preventing the lumbar support 2 from sliding directly to the bottom of the guide groove 11.

[0045] Furthermore, the back support 1 is provided with a receiving groove 13 with a rear end opening, and the receiving groove 13 is connected to the guide groove 11 in the front and rear directions; the sliding member 3 is located in the receiving groove 13, and is connected to the waist support 2 at the front end of the back support 1 through the guide groove 11. The receiving groove 13 can provide an installation space for the sliding member 3, so the sliding member 3 does not need to be exposed to the outside, thereby keeping the exterior of the back support simple and beautiful.

[0046] like Figure 2-8 As shown, a first compression spring 4 inclined along the lower front is provided between the lower end of the sliding member 3 and the inner wall of the accommodating groove 13, and the first compression spring 4 can generate elastic deformation along the lower front when the sliding member 3 slides; specifically, a first clamping groove 31 opening obliquely downward is provided at the bottom of the sliding member 3, and a first circular ring protruding toward the first clamping groove 31 is provided on the inner wall of the accommodating groove 13, and a first bayonet 12 is formed in the first circular ring. The first compression spring 4 is clamped between the first bayonet 12 and the first clamping groove 31, and generates elastic compression or reset under the action of the sliding member 3.

[0047] Furthermore, in order to allow the sliding member 3 to work normally, a cover plate 14 is provided at the rear end of the back support 1 to cover the opening of the accommodating groove 13; the cover plate 14 can isolate the sliding member 3 in the accommodating groove 13 to prevent debris from entering.

[0048] like Figure 4-8As shown, in order to enable the lumbar support 2 to form an elastic support for the waist in the front-to-back direction, the lumbar support mechanism also includes an elastic support component arranged between the back support 1 and the lumbar support 2, and the elastic support component includes a mounting member 7 connected to the sliding member 3; a connecting portion 21 corresponding to the position of the mounting member 7 is provided at the lower end of the lumbar support 2, an elastic connecting member is provided between the upper end of the connecting portion 21 and the mounting member 7, and the lower end of the connecting portion 21 is rotatably connected to the mounting member 7; the elastic connecting member is a second compression spring 5 that can be elastically deformed front and back; the second compression spring 5 can enable the lumbar support 2 to form an elastic support for the waist in the front-to-back direction through its own elastic deformation, thereby improving the supporting effect of the lumbar support mechanism; specifically, a clamping column 22 facing the mounting member 7 is provided on the connecting portion 21, and a second protruding circular ring is provided at the front end of the mounting member 7, and a second bayonet 72 is formed in the second circular ring, and the second compression spring 5 is clamped between the second bayonet 72 and the clamping column 22, so that the connecting portion 21 of the lumbar support 2 and the mounting member 7 support form an elastic connection.

[0049] like Figure 6 As shown, when the waist presses the lumbar support 2 backward, in order to make the lumbar support 2 slide obliquely forward along the guide faster, the second compression spring 5 is arranged between the mounting member 7 and the upper end of the connecting part 21, and the lower end of the connecting part 21 is rotatably connected to the mounting member 7; specifically, the mounting member 7 is provided with a pivot hole 71 which passes through the left and right sides, and the pivot hole 71 is provided with a pivot 6 which passes the mounting member 7 and the lower end of the connecting part 21 together; after the lower end of the connecting part 21 is rotatably connected to the mounting member 7, a rotation center point will be formed for the upper end of the connecting member 21, so that the second compression spring 5 at the upper end of the connecting member 7 can more easily produce elastic deformation; after the lumbar support 2 is subjected to the backward supporting force of the back, it can more easily form a linkage with the sliding member; specifically, when the connecting part 21 rotates, a downward component force will be generated on the lumbar support 2, so that the lumbar support 2 can slide forward and downward more easily.

[0050] Furthermore, the sliding member 3 and the mounting member 7 are connected by screws (not shown) that are inserted into the guide groove 11 along the front-to-rear direction; the guide groove 11 provides a sliding space for the sliding member 3 while also providing an installation space between the sliding member 3 and the mounting member 7. This design is simple and ingenious, achieving two goals at one stroke.

[0051] Specifically, if Figure 9-10 As shown, in order to provide a left-right symmetrical positioning groove 32 on the sliding member 3, a through hole 33 penetrating from front to back is provided on the bottom wall of the positioning groove 32, and a positioning block 74 protruding backward and symmetrically provided at the rear end of the mounting member 7, and a screw hole 73 is provided on the positioning hole. During installation, the positioning block 74 can be quickly inserted into the positioning groove 32, so that the through hole 33 and the screw hole 73 are quickly aligned to facilitate the screw threading and connection, thereby improving the efficiency of the connection between the sliding member 3 and the mounting member 7.

[0052] A seat is provided, such as Figure 1As shown, it includes a lumbar support mechanism and a back support frame 8, and the back support 1 is installed at the front end of the back support frame 8; when the occupant leans back backward, the back support 1 and the back support frame 8 will rotate backward, and the lumbar support 2 will form an elastic support for the waist forward under the linkage of the sliding member 3 when rotating with the back support 1, thereby protecting the occupant's waist and improving the sitting experience of the chair.

[0053] To sum up, the mechanism has an initial support state and a lumbar-chasing support state on the seat. When the mechanism is in the initial support state, the back bracket 1 and the back support frame 8 are in a forward upright state, and the lumbar support 2 in the initial position provides support for the waist; when the mechanism switches to the lumbar-chasing support state, the back bracket 1 and the back support frame 8 will rotate backward, and the lumbar support 2 will slide forward and downward along the guide groove 11 driven by the sliding member 3, and the sliding member 3 will squeeze the first compression spring 4, so that the first compression spring 4 forms an elastic compression, thereby forming a lumbar-chasing elastic support for the waist; when the waist moves forward away from the lumbar support 2, the first compression spring 4 elastically resets, and the lumbar support 2 is reversely reset to the initial position driven by the sliding member 3, and the mechanism switches back to the initial support state.

[0054] 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 lumbar support mechanism, characterized in that: include A back support (1), wherein a guide groove (11) is provided at a lower end of the back support (1), and the guide groove (11) extends obliquely forward and downward; The waist-chasing component comprises a sliding member (3) and an elastic member, wherein the sliding member (3) is slidably connected to the guide groove (11); the elastic member is connected between the sliding member (3) and the back support (1) and provides an elastic force for the sliding member (3); A lumbar support (2) connected to the front end of the sliding member (3); The lumbar support (2) can be linked with the sliding member (3) under the action of an external force, so that the sliding member (3) and the lumbar support (2) can slide simultaneously along the extension track of the guide groove (11) under the elastic action of the elastic member.

2. A lumbar support mechanism according to claim 1, characterized in that: The guide groove (11) is an arc-shaped groove extending obliquely forward and downward.

3. A lumbar support mechanism according to claim 1, characterized in that: The back support (1) is provided with a receiving groove (13) with a rear end opening, and the receiving groove (13) is connected to the guide groove (11) front to back; the sliding member (3) is located in the receiving groove (13) and is connected to the waist support (2) at the front end of the back support (1) through the guide groove (11).

4. A lumbar support mechanism according to claim 3, characterized in that: A first clamping groove (31) opening obliquely downward is provided at the bottom of the sliding member (3), a first clamping opening (12) facing the first clamping groove (31) is provided on the inner wall of the accommodating groove (13), and the elastic member is a first compression spring (4) arranged between the first clamping groove (31) and the first clamping opening (12).

5. A lumbar support mechanism according to claim 3, characterized in that: A cover plate (14) is provided at the rear end of the back support (1) for covering the opening of the accommodating groove (13).

6. A lumbar support mechanism according to claim 3, characterized in that: It also includes an elastic support component arranged between the back support (1) and the lumbar support (2), the elastic support component including a mounting member (7) connected to the sliding member (3); a connecting portion (21) corresponding to the position of the mounting member (7) is provided at the lower end of the lumbar support (2), and the lower end of the connecting portion (21) is rotatably connected to the mounting member (7).

7. A lumbar support mechanism according to claim 6, characterized in that: An elastic connecting piece is provided between the upper end of the connecting portion (21) and the mounting piece (7), and the elastic connecting piece is a second compression spring (5) that can be elastically deformed forwards and backwards.

8. A lumbar support mechanism according to claim 6, characterized in that: The sliding member (3) and the mounting member (7) are connected via screws that penetrate the guide groove (11) along the front-rear direction.

9. A seat, characterized in that: It comprises the lumbar support mechanism and the back support frame (8) as described in any one of claims 1 to 8, wherein the back support (1) is mounted on the front end of the back support frame (8).

Images