CN211748206U - Chassis of office chair - Google Patents
Chassis of office chair Download PDFInfo
- Publication number
- CN211748206U CN211748206U CN201922480346.7U CN201922480346U CN211748206U CN 211748206 U CN211748206 U CN 211748206U CN 201922480346 U CN201922480346 U CN 201922480346U CN 211748206 U CN211748206 U CN 211748206U
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- CN
- China
- Prior art keywords
- shell
- elastic sheet
- blocking piece
- pressing plate
- backrest
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- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 230000000903 blocking effect Effects 0.000 claims description 34
- 230000003139 buffering effect Effects 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 4
- 239000012634 fragment Substances 0.000 abstract description 15
- 230000005540 biological transmission Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model relates to an office chair chassis, which comprises a shell, a backrest lever and an adjusting mechanism, wherein the adjusting mechanism comprises a spring plate, a spring plate pressing platform, a spring plate pressing plate and an adjusting screw rod which are arranged inside the shell, one end of the spring plate is fixedly connected with the shell, a backrest lever fulcrum is rotatably connected with the shell, one end of the spring plate extends into the shell and pushes against the lower side of the middle part of the spring plate, and the other end of the spring plate is outside the shell and can be connected with a chair backrest; the inner part of the elastic sheet pressing plate is provided with an internal thread matched with the adjusting screw rod, the upper surface of the elastic sheet pressing plate is contacted with the upper surface of the inner part of the shell, and the lower surface of the elastic sheet pressing plate is provided with a semicircular pressing boss; the upper surface of the elastic sheet pressing table is provided with a semicircular stressed boss and is arranged on the upper surface of the movable end of the elastic sheet; adjusting screw and shell fragment clamp plate threaded connection, it contacts mutually with the atress boss to push down the boss, the utility model discloses choose for use to pass through the middle part that the back lever transmits the shell fragment with the strength of back for the atress of shell fragment is more even.
Description
Technical Field
The utility model relates to the field of furniture, especially, relate to an office chair chassis.
Background
Chinese publication No.: CN204561492U discloses a chair that can satisfy different human bodies and position of sitting needs, its power adjusting device that inclines and faces upward is such, with the one end of shell fragment and back fixed connection, the other end and chassis swing joint, then set up a pivot that can translate in the middle part of shell fragment, through changing the distance of pivot and shell fragment chassis end, adjust its power of inclining and facing upward, in the in-service use, this scheme exists that the shell fragment stress point is unset, consequently contact with the shell fragment, the surface of movable part can receive comparatively serious wearing and tearing, the condition that the part wearing and tearing became invalid can appear, has restricted life.
SUMMERY OF THE UTILITY MODEL
The utility model provides an office chair chassis, which comprises a shell, a backrest lever and an inclination and elevation force adjusting mechanism, wherein the inclination and elevation force adjusting mechanism comprises an elastic sheet, an elastic sheet pressing platform, an elastic sheet pressing plate and an adjusting screw rod which are arranged inside the shell, the elastic sheet is longitudinally arranged, one end of the elastic sheet is fixedly connected with the shell, a backrest lever fulcrum is rotationally connected with the shell, one end of the backrest lever fulcrum extends into the shell and abuts against the lower side of the middle part of the elastic sheet, and the other end of the backrest lever fulcrum is outside the shell and can be connected with a chair backrest;
the inner part of the elastic sheet pressing plate is provided with an internal thread matched with the adjusting screw rod, the upper surface of the elastic sheet pressing plate is contacted with the upper surface of the inner part of the shell, and the lower surface of the elastic sheet pressing plate is provided with a semicircular pressing boss;
the upper surface of the elastic sheet pressing table is provided with a semicircular stressed boss and is arranged on the upper surface of the movable end of the elastic sheet;
the adjusting screw is in threaded connection with the elastic sheet pressing plate, and the pressing boss is in contact with the stress boss.
Preferably, the backrest lever comprises a first force arm, a second force arm and a connecting shaft, wherein one end of the first force arm and one end of the second force arm are both provided with connecting holes for inserting the connecting shaft, the other end of the second force arm is further provided with a sliding pipe for abutting against the elastic sheet, and the connecting shaft is further sleeved with a sliding sleeve for being rotatably connected with the shell.
Preferably, the connecting shaft may have one of a polygonal tube and a tube with external splines, and the connecting hole has a shape matching the shape of the connecting shaft.
Preferably, the spring plate pressing table is further provided with an articulated arm, and the spring plate pressing table is articulated on the shell through the articulated arm.
Preferably, the upper surface inside the shell is further provided with a pressing plate rail, the pressing plate rail is a section of straight strip-shaped protrusion, and the upper surface of the elastic sheet pressing plate is further provided with a groove matched with the pressing plate rail.
Preferably, the chassis is provided with another set of tilting force adjusting mechanism and a backrest lever in a mirror image manner, and the thread part of the adjusting screw is provided with two threads with the same length and opposite thread directions.
Preferably, the chassis further has a tilt angle locking structure including: the gear shifter comprises a gear shifter, a blocking piece track plate and a blocking piece torsion spring, wherein the gear shifter is fixedly arranged on a connecting shaft of a backrest lever, the blocking piece track plate and the blocking piece torsion spring are arranged inside a shell, one end of the blocking piece is hinged to the blocking piece track plate, the other end of the blocking piece is connected with the blocking piece torsion spring, and the blocking piece is abutted against the gear shifter under the action of the blocking piece torsion spring;
the gear shifter can rotate along with the backrest lever, and at least three gear plate inserting grooves are formed in the surface of the gear shifter, swept by the gear plates, of the backrest lever in the rotating direction of the backrest lever;
the middle part of the baffle is provided with a protruding part which can be inserted into the baffle slot, and one end of the baffle, which is connected with the baffle torsion spring, is also provided with an operation hole.
Preferably, the leaning and leaning force adjusting mechanism further comprises a buffer device, the buffer device comprises a buffer foot arranged outside the shell, two ends of the buffer foot are respectively connected with the shell and the seat base in a rotating mode, a torsion spring is arranged inside the buffer foot, and two ends of the torsion spring are respectively connected with the buffer foot and the shell.
The beneficial effects of the utility model reside in that: choose for use to pass through the middle part of back lever with the strength of back with power transmission to the shell fragment for the atress of shell fragment is more even, and through the depth of push down that changes shell fragment one end, the pressure of direct adjustment shell fragment makes and need not change the relative position of shell fragment stress point and can change the dynamics of heeling on, the maintenance of the shell fragment of being convenient for, the stress point relatively fixed of this kind of structure shell fragment simultaneously, the inside wearing and tearing of structure are less, reduce the condition that leads to the inefficacy because of wearing and tearing.
Drawings
Fig. 1 is a schematic perspective view of the pitch-up force adjusting mechanism of the present invention, wherein the viewing angle is from bottom to top;
fig. 2 is a schematic perspective view of the pitch-up force adjusting mechanism of the present invention, wherein the viewing angle is from top to bottom;
fig. 3 is a schematic layout view of a pressing boss and a force-bearing boss of the improved form of the pitch-up force adjusting mechanism of the present invention;
fig. 4 is a schematic layout view of the elastic sheet pressing table of the present invention;
FIG. 5 is a schematic view of the arrangement of the buffering legs of the present invention;
FIG. 6 is a schematic structural view of the tilt angle locking structure of the present invention
Fig. 7 is a schematic structural view of the gear shifting device of the present invention;
fig. 8 is a schematic structural view of the baffle of the present invention.
Detailed Description
The invention will be further elucidated with reference to the accompanying drawings:
as shown in fig. 1-2, an office chair chassis comprises a shell, a backrest lever 2 and an adjusting mechanism, the shell is hollow, the adjusting mechanism comprises an elastic sheet 35, an elastic sheet pressing platform 31, an elastic sheet pressing plate 32 and an adjusting screw rod which are arranged in the shell 1, the elastic sheet 35 is arranged along the longitudinal direction of the shell, one end of the adjusting screw rod is fixedly connected with the shell, the other end is a movable end, a fulcrum of the backrest lever 2 is rotatably connected with the shell 1, one end of the adjusting screw rod extends into the shell and abuts against the lower side of the middle part of the elastic sheet 35, the other end of the adjusting screw rod is arranged outside the shell and can be connected with the backrest of the seat, two ends of the adjusting screw rod are rotatably connected with the loading shell, one end of the shell is fixedly provided with a transmission gear, the shell is rotatably connected with an adjusting wrench, the adjusting wrench is provided with an adjusting gear, the adjusting gear is meshed with the transmission gear, and the diameter of the adjusting gear is larger than that of the transmission gear;
the diameter of the adjusting gear is larger than that of the transmission gear, so that a user can rotate the adjusting screw rod through the adjusting wrench more easily.
The elastic sheet 35 is made of a material with good elasticity and toughness, and can be one of a glass fiber sheet and a carbon fiber sheet.
The inner part of the elastic sheet pressing plate 32 is provided with an internal thread matched with the adjusting screw rod, the upper surface of the elastic sheet pressing plate is contacted with the top surface of the inner part of the shell 1, and the lower surface of the elastic sheet pressing plate is provided with a semicircular pressing boss 321;
a pressing plate rail 11 is further arranged on the top surface inside the shell 1, the pressing plate rail 11 is a section of straight strip-shaped protrusion, and a groove matched with the pressing plate rail is further formed in the upper surface of the elastic plate pressing plate 32;
the provision of the platen rail 11 enables the dome platen 32 to travel in a more accurate trajectory and attitude.
The upper surface of the elastic sheet pressing platform 31 is provided with a semicircular stressed boss 311 and is arranged on the upper surface of the movable end of the elastic sheet 35;
the pressing boss 321 is in contact with the stress boss 311, the adjusting screw is in threaded connection with the spring plate pressing plate 32, and the adjusting screw is rotated to slide transversely, so that the pressing boss 321 extrudes the stress boss 311.
When the leaning and leaning force of the seat backrest needs to be increased, the adjusting screw rod is rotated, the downward pressing boss 321 is made to transversely slide, the downward pressing boss 321 extrudes the stress boss 311, the stress boss 311 is stressed to move downwards, the movable end of the elastic sheet 35 is pressed downwards, the elastic sheet 35 is bent, the backrest transmits force to the middle part of the elastic sheet 35 through the backrest lever 2, and the seat backrest needs to be leaned and leaned by a larger force, or vice versa.
The backrest lever 2 comprises a first force arm 21, a second force arm 22 and a connecting shaft 23, wherein one end of the first force arm 21 and one end of the second force arm 22 are both provided with connecting holes for inserting the connecting shaft 23, the first force arm 21 is positioned outside the shell 1, the second force arm 22 is positioned inside the shell 1, the other end of the second force arm is further provided with a sliding pipe 24 for abutting against the elastic sheet, the connecting shaft 23 is further sleeved with a sliding sleeve 25 for being connected with the shell 1 in a rotating mode, and the sliding sleeve 25 is arranged between the first force arm 21 and the second force arm 22.
The connecting shaft 23 may have one of a polygonal tube and a tube with external splines, and the connecting hole has a shape matching the outer shape of the connecting shaft 23.
As shown in fig. 4, the striking plate 31 further has an articulated arm 312, by which the striking plate 31 is articulated to the housing 1.
As an improved form of the scheme, referring to fig. 1 and fig. 2, a plane perpendicular to the adjusting screw is taken as a mirror image plane, and the tilting force adjusting mechanism is further provided with another set of adjusting mechanism and a backrest lever 2 in a mirror image manner;
the two second force arms 22 which are mirror images of each other are integrally formed, the two first force arms 21 which are mirror images of each other are integrally formed, and the transfer shaft simultaneously penetrates through the four force arms;
the thread part of the adjusting screw is provided with two threads with the same length and opposite thread directions, and the two elastic sheet pressing plates 32 which are mirror images can be close to each other or far away from each other by rotating the adjusting screw;
as shown in fig. 3, the elastic sheet pressing platform 31 may not be arranged in a mirror image manner, and only needs to be capable of contacting with two elastic sheets at the same time, and the force-bearing boss 311 is arranged between the two elastic sheets.
As an additional feature, as shown in fig. 5, the reclining force adjusting mechanism further includes a buffering device, the buffering device includes a buffering leg 7 disposed outside the housing 1, two ends of the buffering leg 7 are respectively rotatably connected to the housing 1 and the seat base, a torsion spring is disposed inside the buffering leg 7, and two ends of the torsion spring are respectively connected to the buffering leg 7 and the housing 1.
After increasing buffer, the in-process that the user sat down, buffer will drive the motion of chair base below backward, offset a part impact force after, reply a locating position, increase the comfort that the user sat on the chair, also can increase the elasticity of base simultaneously, reduce the use of the required elastic fabric of base, effectively reduce the cost.
As another additional feature of the present invention, referring to fig. 6, the tilt angle locking structure includes: the gear shifter comprises a gear shifter 4, a baffle plate 5, a baffle plate track plate 6 and a baffle plate torsion spring 8, wherein the gear shifter 4 is fixedly arranged on a connecting shaft 23 of a backrest lever 2, the baffle plate track plate 6 and the baffle plate torsion spring 8 are arranged inside a shell, one end of the baffle plate 5 is hinged on the baffle plate track plate, the other end of the baffle plate 5 is connected with the baffle plate torsion spring 8, and the baffle plate is abutted against the gear shifter 4 under the action of the baffle plate torsion spring 8;
referring to fig. 7, the shift position device 4 can rotate along with the backrest lever 2, and at least three shift position slot 41 are arranged on the surface of the shift position device 4 swept by the shift position piece along the rotation direction of the backrest lever 2;
as shown in fig. 8, a protruding portion 51 capable of being inserted into the blocking piece slot 41 is disposed in the middle of the blocking piece 5, and an operation hole 52 is further opened at one end of the blocking piece 5 connected to the blocking piece torsion spring, and the operation hole 52 may be connected to an operation mechanism on the seat through a wire.
One end of the backrest lever 2 is connected with the backrest, the other end of the backrest lever is in contact with the tilting force adjusting structure inside the shell, so that the force on the backrest is transferred to the tilting force adjusting structure, in the process, if the tilting angle needs to be locked, only the blocking piece needs to be stirred, the blocking piece is enabled to leave the surface of the gear device 4, then after the tilting angle of the backrest is adjusted, the blocking piece 5 is loosened, the blocking piece 5 can be drawn close to the direction of the gear device 4 under the action of the blocking piece torsion spring, the protruding part of the blocking piece can be inserted into the blocking piece inserting slot 41, if the blocking piece cannot be accurately inserted, the tilting angle of the backrest is slightly adjusted, and the blocking piece 5 can slide into the blocking piece inserting slot 41.
The above-mentioned embodiments are merely preferred examples of the present invention, and do not limit the scope of the present invention, so all equivalent changes or modifications made by the structure, features and principles of the present invention should be included in the claims of the present invention.
Claims (8)
1. An office chair chassis is characterized by comprising a shell, a backrest lever and a leaning and leaning force adjusting mechanism, wherein the leaning and leaning force adjusting mechanism comprises an elastic sheet, an elastic sheet pressing platform, an elastic sheet pressing plate and an adjusting screw rod which are arranged in the shell, the elastic sheet is longitudinally arranged, one end of the elastic sheet is fixedly connected with the shell, a backrest lever fulcrum is rotatably connected with the shell, one end of the elastic sheet extends into the shell and abuts against the lower side of the middle part of the elastic sheet, and the other end of the elastic sheet is arranged outside the shell and can be connected with a chair backrest;
the inner part of the elastic sheet pressing plate is provided with an internal thread matched with the adjusting screw rod, the upper surface of the elastic sheet pressing plate is contacted with the upper surface of the inner part of the shell, and the lower surface of the elastic sheet pressing plate is provided with a semicircular pressing boss;
the upper surface of the elastic sheet pressing table is provided with a semicircular stressed boss and is arranged on the upper surface of the movable end of the elastic sheet;
the adjusting screw is in threaded connection with the elastic sheet pressing plate, and the pressing boss is in contact with the stress boss.
2. The office chair chassis according to claim 1, wherein the backrest lever comprises a first force arm, a second force arm and a connecting shaft, wherein one end of the first force arm and one end of the second force arm are provided with connecting holes for inserting the connecting shaft, the other end of the second force arm is further provided with a sliding tube for abutting against a spring plate, and the connecting shaft is further sleeved with a sliding sleeve for being rotatably connected with the shell.
3. An office chair chassis according to claim 2, wherein the connecting shaft has an external shape selected from the group consisting of a polygonal tube and a tube with external splines, and the connecting hole has a shape matching the external shape of the connecting shaft.
4. An office chair chassis according to claim 1 in which the sprung platen is also provided with an articulated arm by which the sprung platen is articulated to the housing.
5. The office chair chassis according to claim 1, wherein the upper surface of the inside of the shell is further provided with a pressing plate rail, the pressing plate rail is a straight strip-shaped protrusion, and the upper surface of the spring pressing plate is further provided with a groove matched with the pressing plate rail.
6. An office chair chassis according to any one of claims 1 to 5, wherein the chassis is provided with a mirror image of another set of a reclining force adjusting mechanism and a backrest lever, and the thread part of the adjusting screw is provided with two threads with the same length and opposite thread directions.
7. An office chair chassis according to claim 2, wherein said chassis is further provided with a pitch angle locking arrangement comprising: the gear shifter comprises a gear shifter, a blocking piece track plate and a blocking piece torsion spring, wherein the gear shifter is fixedly arranged on a connecting shaft of a backrest lever, the blocking piece track plate and the blocking piece torsion spring are arranged inside a shell, one end of the blocking piece is hinged to the blocking piece track plate, the other end of the blocking piece is connected with the blocking piece torsion spring, and the blocking piece is abutted against the gear shifter under the action of the blocking piece torsion spring;
the gear shifter can rotate along with the backrest lever, and at least three gear plate inserting grooves are formed in the surface of the gear shifter, swept by the gear plates, of the backrest lever in the rotating direction of the backrest lever;
the middle part of the baffle is provided with a protruding part which can be inserted into the baffle slot, and one end of the baffle, which is connected with the baffle torsion spring, is also provided with an operation hole.
8. The office chair chassis according to claim 1, wherein the leaning force adjusting mechanism further comprises a buffering device, the buffering device comprises a buffering leg disposed outside the housing, two ends of the buffering leg are respectively rotatably connected to the housing and the seat base, a torsion spring is disposed inside the buffering leg, and two ends of the torsion spring are respectively connected to the buffering leg and the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922480346.7U CN211748206U (en) | 2019-12-31 | 2019-12-31 | Chassis of office chair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922480346.7U CN211748206U (en) | 2019-12-31 | 2019-12-31 | Chassis of office chair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211748206U true CN211748206U (en) | 2020-10-27 |
Family
ID=72891195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922480346.7U Active CN211748206U (en) | 2019-12-31 | 2019-12-31 | Chassis of office chair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211748206U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111150251A (en) * | 2020-01-09 | 2020-05-15 | 东莞二昆虫家居科技有限公司 | Chassis inclination force adjusting device |
-
2019
- 2019-12-31 CN CN201922480346.7U patent/CN211748206U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111150251A (en) * | 2020-01-09 | 2020-05-15 | 东莞二昆虫家居科技有限公司 | Chassis inclination force adjusting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240412 Address after: Building 1, 4th Floor, Zone 2, Sunshine Industrial Park, Guzhang Road, Dipu Street, Anji County, Huzhou City, Zhejiang Province, 313000 (within Anji Dadi Steel Plastic Products Co., Ltd.) (self declared) Patentee after: Zhejiang Erchong Technology Co.,Ltd. Country or region after: China Address before: Room 1313, Building 1, No. 4, Headquarters Second Road, Songshan Lake Park, Dongguan City, Guangdong Province, 523000 Patentee before: Dongguan second insect Home Technology Co.,Ltd. Country or region before: China |