Seat chassis structure
By integrating the seat lifting and lowering adjustment, backrest tilt locking and forward tilt limiting functions into the chassis structure, the complex structure and error-prone problems during the seat assembly process are solved, and the assembly process is simplified and assembly efficiency is improved, and user experience and performance are improved.
Patent Information
- Application Number
- CN202422428288.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The existing liftable seats are complex, cumbersome and error-prone during assembly, resulting in high production costs, low assembly efficiency and poor user experience.
The seat lifting adjustment, backrest tilt locking and forward tilt limiting functions are integrated into the chassis structure, and a simplified locking device and a forward tilt limiting device are used to install and design them into non-coined structures through the first and second mounting grooves to avoid functional conflicts and use pull wires and return springs to achieve convenient operation.
The seat assembly process is simplified, assembly efficiency and accuracy are improved, production costs are reduced, and user experience and overall seat performance are improved.
Smart Images
Figure CN223183193U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of seats, in particular to a seat chassis structure. Background Art
[0002] With the increasing demand for comfort and functionality in modern office and home environments, height-adjustable chairs have become an integral part of the market. These chairs not only offer height adjustment to accommodate varying heights and work requirements, but also incorporate a variety of additional features to enhance the user experience, such as adjustable backrest spring force, a reclining lock, and forward tilting limiters.
[0003] However, as seats continue to expand in functionality, their internal structures and assembly processes are becoming increasingly complex. Traditional seat assembly methods often involve numerous screws, nuts, and other fasteners, as well as complex assembly steps. This not only increases production costs but also creates significant assembly challenges. This is particularly true for seats that require on-site installation or user-assembled products. The cumbersome assembly process often degrades the user experience and can even lead to assembly errors or damage.
[0004] Therefore, in order to solve the problems of tedious, complicated and error-prone assembly in existing liftable seats, it is necessary to improve the functional structure of the seats, simplify the assembly process, and improve assembly efficiency and accuracy. This can significantly reduce the production and assembly costs of the seats, while improving the user experience and the overall performance of the seats. Utility Model Content
[0005] The purpose of the present invention is to solve the above-mentioned technical problems and provide a seat chassis structure. The present application aims to improve the seat chassis structure and integrate the seat lifting adjustment, backrest reclining locking and backrest forward tilt limiting functions on the seat chassis.
[0006] A seat chassis structure includes a chassis, a lifting device, a locking device and a forward tilt limit device, the chassis includes a lifting mounting position and a locking limit mounting position, the lifting device is installed on the lifting mounting position, the locking limit mounting position includes a first mounting slot and a second mounting slot, the first mounting slot and the second mounting slot are facing the seat back, the locking device is telescopically installed in the first mounting slot, the locking device extends into the seat back to lock the position of the seat back, the forward tilt limit device is telescopically installed in the second mounting slot, the forward tilt limit device extends into the movement trajectory of the seat back, so that it cooperates with the seat back to limit the forward tilt position of the seat back.
[0007] According to the seat chassis structure of the present application, the chassis is improved, and the lifting device, locking device and forward tilt limit device of the seat are uniformly assembled on the chassis, making the assembly structure of the seat simpler and more convenient, and improving the assembly efficiency and accuracy of the seat; the structure of the locking device and the forward tilt limit device is also simplified, and the same installation position is used for installation, so that the locking device and the forward tilt limit device can better cooperate with each other, and the structure is also simpler and more reliable, and it is also easier to assemble the locking device and the forward tilt limit device on the chassis.
[0008] Furthermore, the first and second mounting slots are arranged in a vertical relationship, and the portions of the locking device and the forward tilt limiter that extend and engage with the seat back do not overlap when viewed from above. This avoids functional conflict between the locking device and the forward tilt limiter, and prevents them from interfering with each other.
[0009] Furthermore, the locking device includes a locking block, a first pull wire and a first return spring. The locking block is retractably installed in the first mounting groove. The seat back is provided with multiple locking grooves corresponding to the positions of the locking block. The first pull wire is connected to the locking block. The first return spring is pressed against the locking block and the first mounting groove respectively. In the locked state, the locking block extends into the locking groove under the action of the first return spring. In the unlocked state, the locking block is pulled out of the locking groove by the first pull wire, and the first return spring is compressed.
[0010] Furthermore, a first pull wire mounting member is provided on the locking limit mounting position, wherein a first wire groove is provided in the first pull wire mounting member, the first wire groove being connected to the first mounting groove, and the first pull wire is guided into the first mounting groove through the first wire groove. The first pull wire mounting member can protect the first pull wire and prevent the first pull wire from damaging the groove body of the first mounting groove.
[0011] Furthermore, the forward tilt limit device includes a forward tilt limit block, a second pull wire and a second return spring. The forward tilt limit block is retractably installed in the second mounting groove. The seat back is provided with a limit groove at the position corresponding to the forward tilt limit block. The second pull wire is connected to the forward tilt limit block. The second return spring is respectively pressed against the forward tilt limit block and the second mounting groove. The forward tilt limit block has a limiting portion extending into the limiting groove under the pressure of the second return spring. When the seat back leans back, the limiting portion slides in the limiting groove. When the seat back tilts forward, there is a forward tilt limit position so that the limiting portion and the groove surface of the limiting groove are pressed against each other for limitation. The forward tilt limit block is pulled out of the limiting groove by the second pull wire, the second return spring is compressed, and the forward tilt limit of the seat back is released.
[0012] Furthermore, a second pull wire mounting member is provided on the locking limit mounting position, and a second wire groove is provided in the second pull wire mounting member. The second wire groove communicates with the second mounting groove, and the second pull wire is guided into the second mounting groove through the second wire groove. The second pull wire mounting member can protect the second pull wire and prevent the second pull wire from damaging the groove body of the second mounting groove.
[0013] Furthermore, the second mounting slot is arranged above the first mounting slot, the forward tilting limit block and the second mounting slot are provided with corresponding limit posts, and the second return spring is sleeved on the limit posts. The provision of the limit posts can prevent the position of the second spring from being offset.
[0014] Furthermore, the seat backrest further includes a spring force adjustment device. The chassis further includes a sliding mounting position. The spring force adjustment device is slidably mounted in the sliding mounting position. The spring force adjustment device slides in the sliding mounting position to adjust the spring force of the seat backrest. The spring force adjustment device includes a leaf spring, a driving member, and a sliding member. The ends of the leaf spring press against the seat backrest and the chassis. The sliding member presses against the lower middle portion of the leaf spring. A guide rail is provided in the sliding mounting position. The sliding member is mounted on the guide rail. The driving member drives the sliding member to slide along the guide rail to change the position of the sliding member pressing against the leaf spring. By adjusting the position of the pressing leaf spring, the spring force provided by the leaf spring to the seat backrest is adjusted.
[0015] Furthermore, the driving member includes a driving rod and a screw rod, one side of the driving rod is transmission-connected to the screw rod, and the screw rod is threadedly connected to the sliding member.
[0016] Furthermore, the lifting device includes a trigger plate, a third pull wire and a support rod, the lifting mounting position includes a mounting hole and a hinge seat, the support rod is installed in the mounting hole, the trigger portion of the support rod extends upward from the mounting hole, one end of the trigger plate is hingedly installed in the hinge seat, and the other end of the trigger plate is connected to the third pull wire. The trigger plate triggers the trigger portion under the pull of the third pull wire, causing the support rod to be raised and lowered. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional diagram of the seat of the present invention.
[0018] Figure 2 It is a cross-sectional view of the seat chassis structure of the present invention.
[0019] Figure 3 This is an exploded view of the seat chassis structure of the present invention.
[0020] Figure 4 It is a three-dimensional diagram of the seat chassis structure of the present invention.
[0021] Figure 5 for Figure 4A partial enlarged view of . DETAILED DESCRIPTION
[0022] A seat chassis structure of the present invention is described with reference to the accompanying drawings.
[0023] like Figures 1 to 5 The seat chassis structure shown in the figure includes a chassis 1, a lifting device 2, an elastic force adjustment device 3, a locking device 4 and a forward tilt limit device 5. The chassis 1 is fixed under the seat cushion 7, and the seat back 6 is hingedly installed on the seat cushion 7. The chassis 1 includes a lifting installation position 12, a sliding installation position 11 and a locking limit installation position 13. After the chassis 1 is installed, the functions of lifting, elastic force adjustment, locking and forward tilt limit of the seat can be formed, making the assembly structure of the seat simpler and more convenient, and improving the assembly efficiency and accuracy of the seat; the lifting device 2 is installed on the lifting installation position 12, the elastic force adjustment device 3 is slidably installed in the sliding installation position 11, and the elastic force of the seat back 6 is slidably adjusted in the sliding installation position 11. The locking limit installation position 13 3 includes a first mounting slot 131 and a second mounting slot 132, the first mounting slot 131 and the second mounting slot 132 facing the seat back 6. The locking device 4 is retractably mounted in the first mounting slot 131 and extends into the seat back 6 to lock the seat back 6 in position. The forward tilt limiting device 5 is retractably mounted in the second mounting slot 132 and extends into the movement trajectory of the seat back 6 so as to cooperate with the seat back 6 to limit the forward tilt position of the seat back 6. The structures of the locking device 4 and the forward tilt limiting device 5 are also simplified. They are installed in the same mounting position, so that the locking device 4 and the forward tilt limiting device 5 can better cooperate with each other, and the structure is simpler and more reliable. It is also easier to assemble the locking device 4 and the forward tilt limiting device 5 to the chassis 1.
[0024] like Figure 5 As shown, the present application provides an embodiment in which the first mounting groove 131 and the second mounting groove 132 are arranged in a vertical positional relationship, and the portions of the locking device 4 and the forward tilt limiting device 5 that extend out to cooperate with the seat back 6 do not overlap in a top view. The non-overlapping can avoid the functions of the locking device 4 and the forward tilt limiting device 5 from conflicting with each other and avoiding mutual obstruction in position, such as Figure 5 As shown, the protruding portion of the forward tilt limit device 5 is a limiting portion 512, and the limiting portion 512 is arranged on both sides of the forward tilt limit device 5, so that the forward tilt limit device 5 is Y-shaped in a plan view, and the limiting portion 512 is arranged at both ends of the Y-shape. The protruding portion of the locking device 4 is arranged in the middle of the Y-shape in a plan view, so that the limiting portion 512 can avoid the protruding portion of the locking device 4 and do not overlap in a plan view, as shown in FIG. Figure 3As described above, the non-overlapping structures can prevent the structures on the seat back 6 that cooperate with the locking device 4 and the forward tilt limiting device 5 from overlapping and affecting each other.
[0025] like Figures 3 to 5 As shown, the locking device 4 includes a locking block 41, a first pull wire and a first return spring. The locking block 41 is retractably installed in the first mounting groove 131. The seat back 6 is provided with a plurality of locking grooves 61 at the position corresponding to the locking block 41. Each locking groove 61 can lock the seat back 6 to a different reclining angle. The first pull wire is connected to the locking block 41, and the first return spring is pressed against the locking block 41 and the first mounting groove 131 respectively. In the locked state, the locking block 41 extends into the locking groove 61 under the action of the first return spring. In the unlocked state, the locking block 41 is pulled out of the locking groove 61 by the first pull wire, and the first return spring is compressed. When the first pull wire stops being pulled, the locking block 41 can be reset under the action of the first return spring. When the locking block 41 is relative to the position of a locking groove 61, the locking block 41 can be pushed into the locking groove 61 to position the reclining angle of the seat back 6.
[0026] like Figures 3 to 5 As shown, the locking limit installation position 13 is provided with a first pull wire installation part 133, and the first pull wire installation part 133 is preferably made of wear-resistant material. A first wire groove is provided in the first pull wire installation part 133, and the first wire groove is connected to the first installation groove 131. The first pull wire is introduced into the first installation groove 131 through the first wire groove. When the first pull wire is pulled, the first pull wire can be pulled in the first wire groove under the restriction of the first pull wire installation part 133. The first pull wire installation part 133 can protect the first pull wire and prevent the position of the first pull wire from being offset and being stuck. It can also prevent the first pull wire from damaging the groove body of the first installation groove 131 during long-term reciprocating pulling. Figures 3 to 5 As shown, the first pull wire mounting member 133 of the present application is L-shaped, and the first wire groove is also L-shaped, so that the first pull wire can be led out from the side of the chassis 1 after being led out of the first mounting groove 131, thereby facilitating its connection with the pulling operating structure on the side of the seat, so that the user can conveniently operate the pulling first pull wire while sitting on the seat.
[0027] like Figures 3 to 5As shown, the forward tilt limit device 5 includes a forward tilt limit block 51, a second pull wire and a second return spring. The forward tilt limit block 51 is retractably installed in the second mounting groove 132. The seat back 6 is provided with a limit groove 62 corresponding to the position of the forward tilt limit block 51. The second pull wire is connected to the forward tilt limit block 51. The second return spring is pressed against the forward tilt limit block 51 and the second mounting groove 132 respectively. The forward tilt limit block 51 has a limit position under the pressure of the second return spring. The part 512 extends into the limiting groove 62. When the seat back 6 leans back, the limiting part 512 slides in the limiting groove 62, so that the forward tilt limit device 5 will not hinder the backward tilt of the seat back 6. When the seat back 6 leans forward, there is a forward tilt limit position so that the limiting part 512 and the groove surface of the limiting groove 62 are restrained and limited, avoiding the seat back 6 from leaning forward excessively. The forward tilt limit block 51 is pulled out of the limiting groove 62 by the second pull wire, the second return spring is compressed, and the forward tilt limit of the seat back 6 is released.
[0028] like Figures 3 to 5 As shown, a second wire installation member 134 is provided on the locking limit installation position 13, and the second wire installation member 134 is made of the same structure and material as the first wire installation member 133, so that the first wire installation member 133 and the second wire installation member 134 can be interchangeable with each other, and a second wire groove is provided in the second wire installation member 134, and the second wire groove is connected to the second installation groove 132, and the second wire is introduced into the second installation groove 132 from the second wire groove. When the second wire is pulled, the second wire can be pulled in the second wire groove under the restriction of the second wire installation member 134. The second wire installation member 134 can protect the second wire, prevent the position of the second wire from being offset and stuck, and can also prevent the second wire from damaging the groove body of the second installation groove 132 during long-term reciprocating pulling.
[0029] The second mounting groove 132 is arranged on the upper part of the first mounting groove 131, so that if the second spring is not limited, the second spring may pop out of the second mounting groove 132, resulting in the failure of the function of the second spring. Figure 5 As shown, the forward limit block 51 and the second mounting slot 132 are correspondingly provided with a limit column 511, and the second return spring is sleeved on the limit column 511. The provision of the limit column 511 can prevent the position of the second spring from being offset.
[0030] like Figure 3 and Figure 4 As shown, the elastic force adjustment device 3 includes a leaf spring 34, a driving member and a sliding member 31. The two ends of the leaf spring 34 are pressed against the seat back 6 and the chassis 1, as shown in FIG. Figure 4The chassis 1 is provided with a socket for inserting the leaf spring 34, and a positioning block 112 is provided in the socket. The leaf spring 34 is provided with a positioning hole so that the leaf spring 34 can be positioned on the end inserted into the chassis 1. The side of the leaf spring 34 inserted into the seat back 6 is not positioned. The sliding member 31 presses against the lower middle portion of the leaf spring 34. The sliding mounting position 11 is provided with a guide rail 111, and the sliding member 31 is mounted on the guide rail 111. The driving member drives the sliding member 31 to slide along the guide rail 111, thereby changing the position of the sliding member 31 pressing against the leaf spring 34. By adjusting the position of the pressing leaf spring 34, the elastic force provided by the leaf spring 34 to the seat back 6 is adjusted.
[0031] like Figure 3 and Figure 4 As shown, the driving member includes a driving rod 32 and a screw 33. One side of the driving rod 32 is connected to the screw 33 through a transmission connection. The driving rod 32 and the screw 33 are connected through a bevel gear transmission connection. The screw 33 is threadedly connected to the sliding member 31. The forward and reverse rotation of the screw 33 can make the sliding member 31 move forward or backward along the screw 33.
[0032] like Figures 3 and 4 As shown, the lifting device 2 includes a trigger plate 22, a third pull wire and a support rod 21. The support rod 21 is a pneumatic rod or a hydraulic rod. The lifting mounting position 12 includes a mounting hole 121 and a hinge seat 122. The support rod 21 is installed in the mounting hole 121. The trigger portion of the support rod 21 extends upward from the mounting hole 121. One end of the trigger plate 22 is hingedly installed in the hinge seat 122. The other end of the trigger plate 22 is connected to the third pull wire. The trigger plate 22 triggers the trigger portion under the pull of the third pull wire, so that the support rod 21 is raised and lowered.
[0033] Based on the disclosure and teachings of the above description, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and any modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although certain specific terms are used in this description, these terms are for convenience of description only and do not constitute any limitation to the present invention.
Claims
1. A seat chassis structure, characterized in that: The seat backrest comprises a chassis, a lifting device, a locking device and a forward tilt limit device, wherein the chassis comprises a lifting mounting position and a locking limit mounting position, the lifting device is mounted on the lifting mounting position, the locking limit mounting position comprises a first mounting slot and a second mounting slot, the first mounting slot and the second mounting slot face the seat back, the locking device is retractably mounted in the first mounting slot, the locking device extends into the seat back to lock the position of the seat back, the forward tilt limit device is retractably mounted in the second mounting slot, the forward tilt limit device extends into the movement trajectory of the seat back, so that it cooperates with the seat back to limit the forward tilt position of the seat back.
2. The seat chassis structure according to claim 1, characterized in that: The first mounting slot and the second mounting slot are arranged in an upper and lower positional relationship, and the parts of the locking device and the forward tilt limiting device that extend out to cooperate with the seat back do not overlap in a top-down view.
3. The seat chassis structure according to claim 1, characterized in that: The locking device includes a locking block, a first pull wire and a first return spring. The locking block is retractably installed in the first installation groove. The seat back is provided with multiple locking grooves at positions corresponding to the locking block. The first pull wire is connected to the locking block. The first return spring is pressed against the locking block and the first installation groove respectively. In the locked state, the locking block extends into the locking groove under the action of the first return spring. In the unlocked state, the locking block is pulled out of the locking groove by the first pull wire, and the first return spring is compressed.
4. The seat chassis structure according to claim 3, characterized in that: A first pull wire installation piece is provided on the locking limit installation position, a first wire groove is provided in the first pull wire installation piece, the first wire groove is connected to the first installation groove, and the first pull wire is introduced into the first installation groove through the first wire groove.
5. The seat chassis structure according to claim 1, characterized in that: The forward tilt limit device includes a forward tilt limit block, a second pull wire and a second return spring. The forward tilt limit block is retractably installed in the second mounting groove. The seat back is provided with a limit groove at the position corresponding to the forward tilt limit block. The second pull wire is connected to the forward tilt limit block. The second return spring is respectively pressed against the forward tilt limit block and the second mounting groove. The forward tilt limit block has a limit portion extending into the limit groove under the pressure of the second return spring. When the seat back leans back, the limit portion slides in the limit groove. When the seat back tilts forward, there is a forward tilt limit position so that the limit portion and the groove surface of the limit groove are pressed against each other for limitation. The forward tilt limit block is pulled out of the limit groove by the second pull wire, the second return spring is compressed, and the forward tilt limit of the seat back is released.
6. The seat chassis structure according to claim 5, characterized in that: A second pull wire installation piece is provided on the locking limit installation position, a second pull wire installation piece is provided with a second wire groove, the second wire groove is connected to the second installation groove, and the second pull wire is introduced into the second installation groove through the second wire groove.
7. The seat chassis structure according to claim 5, characterized in that: The second mounting slot is arranged on the upper part of the first mounting slot, the forward tilting limit block and the second mounting slot are correspondingly provided with limit columns, and the second return spring is sleeved on the limit columns.
8. The seat chassis structure according to claim 1, characterized in that: It also includes an elastic force adjustment device, and the chassis also includes a sliding mounting position. The elastic force adjustment device can be slidably installed in the sliding mounting position. The elastic force adjustment device slides in the sliding mounting position to adjust the elastic force of the seat back. The elastic force adjustment device includes a leaf spring, a driving member and a sliding member. The two ends of the leaf spring are pressed against the seat back and the chassis, and the sliding member is pressed against the lower middle part of the leaf spring. A guide rail is provided in the sliding mounting position, and the sliding member is installed on the guide rail. The driving member drives the sliding member to slide along the guide rail to change the position of the sliding member pressing against the leaf spring.
9. The seat chassis structure according to claim 8, characterized in that: The driving member includes a driving rod and a screw rod. One side of the driving rod is transmission-connected to the screw rod, and the screw rod is threadedly connected to the sliding member.
10. The seat chassis structure according to claim 1, characterized in that: The lifting device includes a trigger plate, a third pull wire and a support rod. The lifting mounting position includes a mounting hole and a hinge seat. The support rod is installed in the mounting hole. The trigger portion of the support rod extends upward through the mounting hole. One end of the trigger plate is hingedly installed in the hinge seat. The other end of the trigger plate is connected to the third pull wire. The trigger plate triggers the trigger portion under the pull of the third pull wire, causing the support rod to be raised and lowered.