Combined office chair baseTechnical Field
The invention relates to the technical field of chairs, in particular to a combined office chair base.
Background
Office chairs are various chairs equipped for convenience in daily life and social activities, and office chairs in a broad sense include all chairs used in offices such as office chairs, middle office chairs, guest chairs, staff chairs, conference chairs, guest chairs, training chairs, etc., and office chairs in a narrow sense are back chairs on which a person sits while performing a desktop work in a sitting posture state.
The prior Chinese patent with the bulletin number of CN205285669U discloses an office chair, which comprises a chair seat, a chair back, a base and an air column, wherein the chair back is arranged at the rear side of the chair seat, and the base is arranged below the chair seat through the air column.
The prior art scheme has the following defects that with the rise of electronic commerce, people often purchase office chairs on the internet, sellers usually disassemble the office chairs into parts such as a chair seat, a chair back, a base, an air column and the like to be sent to users, and then the users assemble the office chairs by themselves.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to solve the problems of the prior art, namely, the invention provides a combined office chair base, which solves the problems of large occupied space and inconvenient storage of the base in the prior art by arranging a connecting frame and supporting legs which are detachably connected.
(II) technical scheme
The combined office chair base comprises a center frame, wherein connecting frames with mounting grooves in the middle are circumferentially arranged on the side walls of the center frame, positioning holes I communicated with the mounting grooves are formed in the side walls of each connecting frame, supporting feet are arranged on each connecting frame, mounting holes for inserting the connecting frames are formed in the middle of each supporting foot, positioning holes II communicated with the mounting holes and used for being aligned with the positioning holes I are formed in the side walls of the supporting feet, spring piece buckles are arranged in the mounting grooves, each spring piece buckle comprises a V-shaped spring piece capable of bending and deforming, protrusions which are arranged on the V-shaped spring pieces and used for sequentially penetrating through the corresponding positioning holes I and II, and deformation gaps are formed in the middle of the protrusions.
The invention is further characterized in that the side wall of the supporting leg far away from the connecting frame is provided with a jack communicated with the mounting hole, one end of the supporting leg far away from the connecting frame is detachably provided with a universal wheel device, the universal wheel device comprises a fixing frame which is in plug-in fit with the mounting hole, the bottom surface of the fixing frame is provided with a groove, the side wall of the fixing frame is provided with a plurality of guide holes communicated with the groove, each guide hole is provided with a plug post which is in plug-in fit with the jack in a sliding manner, and the groove is provided with a control post mechanism which is used for controlling the plug post to reciprocate in the guide hole.
The invention is further characterized in that one end of each inserting column close to the groove is provided with a hinge bracket, the end face of the hinge bracket, facing the groove, is provided with a hinge groove I, the hinge groove I is provided with a hinge shaft I, the column control mechanism comprises a rotary table and a plurality of connecting rods, the rotary table is rotatably arranged at the center of the groove, the side wall of the rotary table is provided with a hinge groove II, each inserting column in the hinge groove II is provided with a hinge shaft II, one end of each connecting rod is hinged with the hinge bracket through the hinge shaft I, the other end of each connecting rod is hinged with the rotary table through the hinge shaft II, and the bottom of the rotary table is coaxially provided with a first wheel frame which is in rotary fit with the groove and is provided with a first universal wheel on the bottom surface.
The invention is further characterized in that a positioning groove is formed in the inner wall of the fixing frame, and a positioning ring which is embedded into the positioning groove and is in running fit with the positioning groove is arranged on the side wall of the first wheel frame.
The invention is further characterized in that a clamping hole I communicated with the positioning groove is formed in the outer side wall of the fixing frame, a clamping groove I aligned with the clamping hole I is formed in the side wall of the positioning ring, a reset spring I is arranged on the bottom wall of the clamping groove I, and a clamping block I matched with the clamping hole I in a clamping way is arranged at one end, away from the bottom wall of the clamping groove I, of the reset spring I.
The invention further provides that the column control mechanism comprises a rotating shaft rotatably arranged at the center of the groove and a cam coaxially arranged on the rotating shaft, wherein the outer contour of the cam is formed by alternately arranging a plurality of convex arc curved surfaces and concave arc curved surfaces, the inserted column is provided with an elastic piece for driving the end part of the inserted column, which is close to the cam, to be attached to the outer contour of the cam, so that the inserted column is driven by the cam to reciprocate in the guide hole, and the bottom of the rotating shaft is coaxially provided with a second wheel carrier which is in rotary fit with the groove and is provided with a second universal wheel on the bottom surface.
The invention is further characterized in that a plurality of spring grooves communicated with the guide holes are formed in the inner wall of the fixing frame, a stress disc in sliding fit with the spring grooves is arranged on the inserting column, and the elastic piece is a control column spring which is sleeved on the inserting column, one end of the elastic piece is connected with the bottom wall of the spring groove, and the other end of the elastic piece is connected with the stress disc.
The invention is further characterized in that a positioning chute is formed in the outer contour of the cam, a wheel mounting groove is formed in one end, facing the cam, of each inserting column, and a positioning roller in rolling fit with the bottom wall of the positioning chute is arranged in each wheel mounting groove.
The invention is further characterized in that a second clamping hole communicated with the groove is formed in the outer side wall of the fixing frame, a second clamping groove aligned with the second clamping hole is formed in the side wall of the second wheel frame, a second reset spring is connected to the bottom wall of the second clamping groove, and a second clamping block matched with the clamp Kong Erka in a connecting mode is arranged at one end, away from the bottom wall of the second clamping groove, of the second reset spring.
(III) beneficial effects
In summary, compared with the prior art, the invention has the following beneficial effects:
1. When the combined office chair base is installed, a user presses two bulges to enable the bulges to descend and enter the first positioning hole, then one end of each supporting leg is sleeved on the connecting frame, the first positioning hole is aligned with the second positioning hole, the two bulges ascend under the reset action of the V-shaped elastic sheet and are inserted into the second positioning hole, and then the connecting frame and the supporting legs are connected together.
2. When the universal wheel device is installed, a user inserts the fixing frame into one end of the mounting hole far away from the connecting frame, aligns the four guide holes with the four jacks, then rotates the first universal wheel, then the first wheel frame and the rotary table rotate along with the fixing frame, and the inserted post extends outwards and penetrates through the jacks under the pushing action of the connecting rod;
3. during installation, a user inserts the mount into one end that the connecting frame was kept away from to the mounting hole to make four guiding holes and four jack alignment, then rotate the second universal wheel, then second wheel carrier, the pivot, the cam rotates thereupon, until the inserted link moves to bellied highest point from the sunken minimum point of cam towards one end of cam, the inserted link outwards stretches out and passes the jack under the promotion effect of cam, simultaneously, draw-in groove two aligns with card hole, reset spring two resets and then promotes the fixture block to move in two directions of keeping away from reset spring, until fixture block two inserts in card hole two, then the second universal wheel, the second wheel carrier, the pivot, the cam is restricted to rotate, the inserted link keeps passing the state of jack, universal wheel device demountable installation is on the supporting legs this moment, and universal wheel device dismouting is comparatively convenient.
Drawings
FIG. 1 is a schematic view of a base of a combined office chair according to the first embodiment;
FIG. 2 is a schematic view of a sectional view of a base of a sectional office chair according to the first embodiment;
FIG. 3 is a schematic diagram of a spring clip according to an embodiment I;
FIG. 4 is a schematic view of the structure of a universal wheel device according to the first embodiment;
FIG. 5 is a schematic view in partial cross-section of a support foot and caster device of the first embodiment;
FIG. 6 is an enlarged view at A in FIG. 5;
fig. 7 is an enlarged view at B in fig. 5;
FIG. 8 is a schematic view showing the structure of each part in the fixing frame in the first embodiment;
FIG. 9 is a schematic view in partial cross-section of a support foot and caster device of the second embodiment;
Fig. 10 is an enlarged view at C in fig. 9;
Fig. 11 is a schematic structural diagram of a center pillar mechanism according to the second embodiment.
The device comprises the following components of 1, a center frame, 2, a connecting frame, 3, a mounting groove, 4, a first positioning hole, 5, a spring piece buckle, 51, a V-shaped spring piece, 52, a bulge, 521, a deformation gap, 6, a supporting leg, 7, a mounting hole, 8, a second positioning hole, 9, an inserting hole, 10, a universal wheel device, 11, a fixing frame, 12, a groove, 13, a guiding hole, 14, a plunger, 15, a hinge frame, 16, a first hinge groove, 17, a first hinge shaft, 18, a turntable, 19, a second hinge groove, 20, a second hinge shaft, 21, a connecting rod, 22, a first wheel frame, 23, a first universal wheel, 24, a positioning groove, 25, a positioning ring, 26, a clamping hole, 27, a clamping groove I, 28, a return spring I, 29, a first clamping block, 30, a spring groove, 31, a force disc, 32, a rotating shaft, 33, a cam, 34, an elastic piece, 35, a bearing groove, 36, a bearing, 37, a positioning chute, 38, a wheel mounting groove, 39, a positioning roller, 40, a second wheel frame, 41, a second wheel frame, a second clamping groove, 41, a second universal wheel, a second clamping groove, 43, a second clamping groove and a second clamping groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Embodiment one:
As shown in fig. 1 and 2, a combined office chair base comprises a center frame 1, wherein the section of the center frame 1 is circular. In this embodiment, five link frames 2 are fixedly connected with on the lateral wall of center frame 1, and five link frames 2 are equidistant circumference and distribute, and mounting groove 3 has all been seted up at the middle part of every link frame 2, and two locating holes one 4 have all been seted up upwards on the lateral wall of every link frame 2, and two locating holes one 4 all communicate with mounting groove 3.
As shown in fig. 2 and 3, a spring piece buckle 5 is provided in each mounting groove 3, and the spring piece buckle 5 includes a V-shaped spring piece 51 and a protrusion 52. The V-shaped spring piece 51 is V-shaped as a whole, and the V-shaped spring piece 51 can be bent and deformed. The number of the protrusions 52 is two and the protrusions are arranged on one sheet body of the V-shaped elastic sheet 51 together, and the middle part of each protrusion 52 is provided with a deformation gap 521.
By providing the deformation gap 521, the protrusion 52 can deform, so that the protrusion 52 can move in the first positioning hole 4 and the second positioning hole 8. When the V-shaped elastic piece 51 works, two sheet bodies of the V-shaped elastic piece 51 prop against the groove wall of the mounting groove 3, two protrusions 52 penetrate through the two positioning holes 4 respectively, and when the two protrusions 52 are pressed, the two sheet bodies of the V-shaped elastic piece 51 are close to each other, and the protrusions 52 move towards the direction close to the mounting groove 3.
As shown in fig. 1 and 2, each connecting frame 2 is detachably connected with a supporting leg 6, the supporting leg 6 is integrally L-shaped, a mounting hole 7 is formed in the middle of the supporting leg 6, two ends of the mounting hole 7 are flush with two end faces of the supporting leg 6 respectively, and the mounting hole 7 is used for inserting the connecting frame 2. The side wall of the supporting leg 6, which is close to the connecting frame 2, is provided with two positioning holes 8 communicated with the mounting holes 7, and the two positioning holes 8 are aligned with the two positioning holes 4 respectively. As shown in fig. 5, the side wall of the supporting leg 6 far away from the connecting frame 2 is provided with four jacks 9, and the four jacks 9 are distributed circumferentially at equal intervals and are all communicated with the mounting hole 7.
The installation process of the base of the combined office chair is as follows:
The user presses two protruding 52, two lamellar bodies of V-arrangement shell fragment 51 are close to each other, protruding 52 removes to the direction that is close to mounting groove 3 to get into locating hole one 4 in, then with the one end cover of supporting legs 6 on link 2, and make locating hole one 4 and locating hole two 8 align, two protruding 52 wear out locating hole one 4 and insert locating hole two 8 under the reset action of V-arrangement shell fragment 51, then link 2 and supporting legs 6 link together, this combination formula office chair base easy dismounting, occupation space is less, is convenient for deposit and transportation.
As shown in fig. 4 and 5, the end of the supporting leg 6 far away from the connecting frame 2 is detachably provided with a universal wheel device 10, the universal wheel device 10 comprises a fixing frame 11, the fixing frame 11 is cylindrical, and the fixing frame 11 is in plug-in fit with the mounting hole 7. The bottom surface of the fixing frame 11 is provided with a groove 12, and the cross section of the groove 12 is round. Four guide holes 13 are formed in the side wall of the fixing frame 11, the four guide holes 13 are distributed circumferentially at equal intervals and are communicated with the grooves 12, and the four guide holes 13 are used for being aligned with the four jacks 9. A plug 14 is slidably provided in each guide hole 13, and the plug 14 is used to pass through the insertion hole 9 so as to connect the supporting leg 6 and the fixing frame 11 together. A control column mechanism is arranged in the groove 12 and is used for controlling the plunger 14 to reciprocate in the guide hole 13.
As shown in fig. 6 and 8, one end of each plunger 14, which is close to the groove 12, is fixedly connected with a hinge bracket 15, the end surface of the hinge bracket 15 facing the groove 12 is provided with a hinge groove one 16, and a hinge shaft one 17 is fixedly connected in each hinge groove one 16.
As shown in fig. 6 and 8, the column control mechanism includes a turntable 18 and a link 21. The turntable 18 is coaxially arranged at the center of the groove 12, and a second hinge groove 19 is formed in the outer side wall of the turntable 18, and the section of the second hinge groove 19 is circular. Four second hinge shafts 20 are fixedly arranged in the second hinge groove 19, the four second hinge shafts 20 are distributed circumferentially at equal intervals, and the positions of the four second hinge shafts 20 correspond to the four first hinge shafts 17 respectively. The number of the connecting rods 21 is four, one end of each connecting rod 21 is hinged with the hinged frame 15 through the first hinged shaft 17, and the other end of each connecting rod 21 is hinged with the turntable 18 through the second hinged shaft 20.
As shown in fig. 5, a first wheel frame 22 is coaxially fixed to the bottom of the turntable 18, the first wheel frame 22 is cylindrical, and the first wheel frame 22 is inserted into the groove 12 and is in running fit with the groove 12. A first universal wheel 23 is fixedly mounted on the bottom surface of the first wheel frame 22, the first universal wheel 23 is positioned outside the groove 12, and the first universal wheel 23 can provide a force application point for a user to rotate the second wheel frame 40.
As shown in fig. 5 and 8, a positioning groove 24 is formed on the inner wall of the fixing frame 11, and the cross section of the positioning groove 24 is circular. A positioning ring 25 is fixedly connected to the side wall of the first wheel frame 22, and the positioning ring 25 is embedded into the positioning groove 24 and forms a running fit with the positioning groove. When the positioning ring 25 is embedded in the positioning groove 24, the first wheel frame 22 cannot move up and down in the groove 12, which is beneficial to increasing the use stability of the universal wheel device 10.
As shown in fig. 7 and 8, a first clamping hole 26 communicated with the positioning groove 24 is formed in the outer side wall of the fixing frame 11, and the cross section of the first clamping hole 26 is circular. The side wall of the positioning ring 25 is provided with a first clamping groove 27 aligned with the first clamping hole 26, and the cross section of the first clamping groove 27 is circular. The bottom wall of the clamping groove I27 is connected with a first reset spring 28, one end, away from the bottom wall of the clamping groove I27, of the first reset spring 28 is connected with a first clamping block 29, the first clamping block 29 is bullet-shaped, and the first clamping block 29 is matched with the first clamping hole 26 in a clamping mode. When the first latch 29 is inserted into the first latch hole 26, the first wheel frame 22 is restricted from rotating.
The installation process of the base of the combined office chair is as follows:
During installation, a user inserts the fixing frame 11 into one end of the mounting hole 7 far away from the connecting frame 2, aligns the four guide holes 13 with the four jacks 9, then rotates the first universal wheel 23, then the first wheel frame 22 and the rotary disc 18 rotate along with the fixing frame, further the inserting column 14 stretches out outwards and penetrates through the jacks 9 under the pushing action of the connecting rod 21, meanwhile, the clamping groove I27 is aligned with the clamping hole I26, the reset spring I28 resets to push the clamping block I29 to be inserted into the clamping hole I26, then the rotating shaft 32, the first wheel frame 22 and the first universal wheel 23 are limited to rotate, the inserting column 14 keeps a state of penetrating through the jacks 9, at the moment, the universal wheel device 10 is detachably installed on the supporting foot 6, and the universal wheel device 10 is convenient to assemble and disassemble.
Embodiment two:
the second embodiment differs from the first embodiment in that:
As shown in fig. 9 and 10, four spring grooves 30 are formed in the inner side wall of the fixing frame 11, the spring grooves 30 are communicated with the guide holes 13, the cross section of each spring groove 30 is circular and concentric with the guide holes 13, and the diameter of each spring groove 30 is larger than the diameter of each guide hole 13. The outer side wall of the inserted column 14 is integrally connected with a force-bearing disc 31, and the force-bearing disc 31 is circular and is in sliding fit with the spring groove 30.
As shown in fig. 9 and 10, the column control mechanism includes a rotation shaft 32, a cam 33, and an elastic member 34. The bottom wall of the groove 12 is provided with a bearing groove 35, and the section of the bearing groove 35 is circular. The rotating shaft 32 is cylindrical, and the rotating shaft 32 is rotatably arranged at the center of the groove 12. The bearing 36 is sleeved at the end part of the rotating shaft 32, the bearing 36 and the bearing groove 35 are mutually embedded, the bearing groove 35 and the bearing 36 are in interference fit, and the rotating shaft 32 is not easy to move in the vertical direction on one hand and can be easily rotated by a user on the other hand through the tight fit between the bearing groove 35 and the bearing 36 and between the bearing 36 and the rotating shaft 32.
As shown in fig. 10 and 11, the cam 33 is coaxially disposed in the middle of the rotating shaft 32, and the outer profile of the cam 33 is formed by alternately disposing four curved surfaces of the protrusions 52 and four curved surfaces of the recesses. The elastic piece 34 is a control column spring sleeved on the plunger 14, one end of the control column spring is connected with the bottom wall of the spring groove 30, the other end of the control column spring is connected with the force-bearing disc 31, the elastic piece 34 is used for pushing the plunger 14 to move towards the direction close to the cam 33, one end of the plunger 14 towards the cam 33 is always attached to the outer contour of the cam 33 under the driving of the elastic piece 34, and the plunger 14 is driven by the cam 33 to do linear reciprocating motion in the guide hole 13. When the end of the plunger 14 facing the cam 33 is fitted at the lowest point of the recess of the cam 33, the plunger 14 is completely located in the guide hole 13, and the elastic member 34 is used to push the plunger 14 to move in a direction approaching the cam 33. When the end of the plunger 14 facing the cam 33 is fitted at the highest point of the projection 52 of the cam 33, the end of the plunger 14 protrudes out of the guide hole 13.
As shown in fig. 10 and 11, the outer contour of the cam 33 is provided with a positioning chute 37, and the section of the positioning chute 37 is rectangular. The end of each plunger 14 facing the cam 33 is provided with a wheel mounting groove 38, each wheel mounting groove 38 is rotatably provided with a positioning roller 39, the positioning roller 39 is embedded into the positioning chute 37, and the positioning roller 39 is in rolling fit with the bottom wall of the positioning chute 37. By providing the positioning slide groove 37 and the positioning roller 39, the end of the plunger 14 close to the cam 33 can more stably move in conformity with the outer contour of the cam 33, and at the same time, the plunger 14 can more stably reciprocate in the guide hole 13.
As shown in fig. 9, a second wheel frame 40 is coaxially fixed to the bottom of the rotation shaft 32, the second wheel frame 40 has a cylindrical shape, and the second wheel frame 40 is inserted into the groove 12 and is in a rotating fit with the groove 12. A second universal wheel 41 is fixedly mounted on the bottom surface of the second wheel frame 40, the second universal wheel 41 is positioned outside the groove 12, and the second universal wheel 41 can provide a force application point for a user to rotate the second wheel frame 40.
As shown in fig. 9, a second clamping hole 42 communicated with the groove 12 is formed in the outer side wall of the fixing frame 11, and the section of the second clamping hole 42 is circular. The side wall of the second wheel frame 40 is provided with a second clamping groove 43 aligned with the second clamping hole 42, and the section of the second clamping groove 43 is circular. The bottom wall of the clamping groove II 43 is connected with a return spring II 44, one end, away from the bottom wall of the clamping groove II 43, of the return spring II 44 is connected with a clamping block II 45, the clamping block II 45 is bullet-shaped, and the clamping block II 45 is matched with the clamping hole II 42 in a clamping way. When the second latch 45 is inserted into the second latch hole 42, the second wheel frame 40 is restricted from rotating to some extent.
The installation process of the base of the combined office chair is as follows:
During installation, a user inserts the fixing frame 11 into one end of the mounting hole 7 far away from the connecting frame 2, aligns the four guide holes 13 with the four insertion holes 9, then rotates the second universal wheel 41, the second wheel frame 40, the rotating shaft 32 and the cam 33 rotate along with the fixing frame until the inserting column 14 moves from the lowest point of the recess of the cam 33 to the highest point of the protrusion 52 towards one end of the cam 33, the inserting column 14 stretches out and passes through the insertion holes 9 under the pushing action of the cam 33, meanwhile, the clamping groove II 43 aligns with the clamping hole II 42, the reset spring II 44 resets to further push the clamping block II 45 to move away from the reset spring II 44 until the clamping block II 45 is inserted into the clamping hole II 42, then the second universal wheel 41, the second wheel frame 40, the rotating shaft 32 and the cam 33 are limited to rotate, the inserting column 14 keeps a state of passing through the insertion holes 9, at the moment, the universal wheel device 10 is detachably mounted on the supporting foot 6, and the universal wheel device 10 is convenient to assemble and disassemble.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.