CN111616542A

CN111616542A - Pedal for ergonomic chair

Info

Publication number: CN111616542A
Application number: CN202010394495.6A
Authority: CN
Inventors: 邓丹; 欧阳钟明
Original assignee: Beijing Youjin Furniture Co ltd
Current assignee: Beijing Youjin Furniture Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2020-09-04

Abstract

The invention relates to the technical field of ergonomic chairs, in particular to a pedal for an ergonomic chair, which comprises a fixed seat fixed at the lower part of a chair cushion, a supporting arm, an angle adjusting seat arranged in the fixed seat and used for adjusting the supporting arm to be in a using or folding state, a sliding component connected to the supporting arm in a sliding way and used for prolonging the length of the supporting arm, and a treading piece fixedly connected to the sliding component and used for supporting feet of a human body. The invention has the effect of facilitating the relaxation of the legs of the human body.

Description

Pedal for ergonomic chair

Technical Field

The invention relates to the technical field of ergonomic chairs, in particular to a pedal for an ergonomic chair.

Background

At present, the ergonomic chair mainly adopts elastic environment-friendly materials such as screen cloth, environment-friendly cloth and memory cotton to manufacture the cushion and the chair back, accords with a human mechanics structure in the overall structure design, can reduce the hip back compression area of a user, press stress points, promote the blood circulation of the hip back, avoid the strain of the neck, the shoulder and the waist, and is very beneficial to the health of people sitting for a long time.

The prior Chinese patent with the publication number of CN210095152U discloses an ergonomic chair structure, which comprises chair legs, a backrest mechanism, a telescopic rod, a seat cushion, a left bracket and a right bracket, wherein the telescopic rod is arranged at the upper end of the chair legs, the seat cushion is arranged at the upper end of the telescopic rod, the seat cushion is horizontally arranged, and the left bracket and the right bracket are respectively arranged at two sides of the rear end of the seat cushion; a first T-shaped sliding groove penetrating through the left support is formed in the left side of the left support, and a second T-shaped sliding groove penetrating through the right support is formed in the right side of the right support; the backrest mechanism comprises a first cross bar, a second cross bar, a left flexible wire, a right flexible wire and backrest cloth which are parallel to each other, wherein the left flexible wire and the right flexible wire are brought into the left support and the right support through a first T-shaped sliding chute and a second T-shaped sliding chute at two ends of the first cross bar respectively; when the multifunctional backrest is used, the buttocks, the back and the shoulders and the neck of a human body can be well relaxed, and meanwhile, the backrest cloth is convenient to disassemble and wash, so that the health is facilitated.

The above prior art solutions have the following drawbacks: when the chair is used, the feet of a human body step on the ground, the blood circulation of the legs is not smooth, and the problem of leg discomfort is easy to occur for a long time.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a pedal for an ergonomic chair, which is beneficial to relaxing legs of a human body.

The above object of the present invention is achieved by the following technical solutions: a pedal for an ergonomic chair comprises a fixed seat fixed on the lower part of a chair cushion, a supporting arm, an angle adjusting seat arranged in the fixed seat and used for adjusting the supporting arm to be in a using or folding state, a sliding component connected on the supporting arm in a sliding manner and used for prolonging the length of the supporting arm, and a pedal piece fixedly connected on the sliding component and used for supporting feet of a human body.

By adopting the technical scheme, when the pedals are used, the supporting arms are firstly turned outwards to the horizontal position, namely the use state, and then the length of the supporting arms is prolonged through the sliding component, then a user can step the feet on the stepping piece after sitting on the cushion, at the moment, the lower legs and the upper legs are supported, and the lower legs and the upper trunk can have better blood circulation, so that the pedal is very beneficial to the health of a person sitting for a long time; when the pedal is not used, the sliding component retracts, and then the supporting arm reversely rotates to the lower part of the chair, namely, the folding state is achieved, and the common use of the chair is facilitated.

The present invention in a preferred example may be further configured to: the fixed seat is fixedly connected with a limiting cylinder; an arc-shaped bulge is protruded in the limiting cylinder, and at least two arc-shaped caulking grooves are formed in the arc-shaped bulge and matched with the inner wall of the limiting cylinder; the angle adjusting seat comprises a rotating shaft, and the middle part of the rotating shaft penetrates through the limiting cylinder; a clamping ring is arranged on the rotating shaft, an arc-shaped embedded plate is arranged on the clamping ring in a protruding mode along the axial direction, the outer diameter of the clamping ring is matched with the inner diameter of the limiting cylinder, and the arc-shaped embedded plate is matched with any one arc-shaped embedding groove; the supporting arm is fixedly connected to the end part of the rotating shaft.

By adopting the technical scheme, when the arc-shaped embedded plate is embedded into the arc-shaped embedded groove, the rotation of the rotating shaft can be limited, and the supporting arm can be kept in a certain position state; the position state of the supporting arm is convenient to adjust.

The present invention in a preferred example may be further configured to: the clamping ring is connected to the rotating shaft in a sliding manner; a strip-shaped abdicating hole is formed in the middle of the rotating shaft; a push rod is connected in the rotating shaft in a sliding manner, a convex column is fixedly connected to the push rod, extends out of the abdicating hole and is inserted in the clamping ring; a telescopic spring is arranged between the supporting arm and the clamping ring; the arc panel and the expansion spring are respectively positioned at two sides of the snap ring.

Through adopting above-mentioned technical scheme, during the push-and-pull push rod, the projection can drive the snap ring and slide, and then makes the arc panel get into or withdraw from the arc caulking groove, and overall operation is comparatively convenient.

The present invention in a preferred example may be further configured to: the sliding component comprises an inner cylinder sleeved on the supporting arm, an outer cylinder sleeved outside the inner cylinder and fixedly connected with the inner cylinder, and a positioning piece used for positioning the sliding position of the inner cylinder on the supporting arm.

Through adopting above-mentioned technical scheme, the inner tube uses the support arm as the slide rail, and the sliding construction who forms is comparatively simple, and in use is comparatively reliable.

The present invention in a preferred example may be further configured to: the supporting arm is provided with a strip-shaped adjusting hole along the horizontal direction, one end of the adjusting hole close to the rotating shaft is communicated with a near-end slotted hole, one end of the adjusting hole far away from the rotating shaft is communicated with a far-end slotted hole, and the diameters of the near-end slotted hole and the far-end slotted hole are the same and are larger than the width of the adjusting hole; the positioning piece comprises a plug and a trigger rod with one end fixedly connected with the plug; the diameter of the plug is larger than that of the trigger rod; the inner cylinder is provided with a first through hole and a second through hole for the plug and the trigger rod to penetrate out; the outer cylinder is provided with a mounting hole for the plug column and the trigger rod to penetrate out; the diameter of the plug is matched with the near-end slotted hole and the far-end slotted hole, and the diameter of the plug is larger than the width of the adjusting hole; the diameter of the trigger rod is smaller than the width of the adjusting hole.

By adopting the technical scheme, when the inner cylinder is in a shortened state, the plug is inserted into the near-end slotted hole, and the sliding of the inner cylinder is limited by the plug; when the inner cylinder is required to slide out, the plug is pulled out of the near-end slotted hole, the trigger rod is positioned in the near-end slotted hole, the diameter of the trigger rod is smaller than the width of the adjusting hole, and the inner cylinder cannot generate an obstruction effect when sliding out; when the inner cylinder slides to the position farthest from the fixed seat, the inner cylinder is just at the extended limit position, and the plug can be inserted into the far-end slotted hole to limit the sliding of the contents. The whole positioning of the inner barrel is convenient, and the user can adjust the inner barrel conveniently and quickly in use.

The present invention in a preferred example may be further configured to: the end part of the plug is provided with a circular end, and the diameter of the circular end is larger than that of the plug and is matched with the mounting hole; the end, far away from the plunger, of the trigger rod is fixedly connected with an outer cover, and the diameter of the outer cover is larger than that of the trigger rod and is matched with the mounting hole.

By adopting the technical scheme, on one hand, the circular end head is matched with the outer cover, so that the position adjustment of the plug column and the trigger rod is more convenient; on the other hand, the plug and the trigger rod can be prevented from being separated from the adjusting hole under abnormal conditions.

The present invention in a preferred example may be further configured to: the trigger rod is sleeved with a reset spring of which one end is connected with the outer cover in an abutting mode and the other end is connected with the supporting arm in an abutting mode.

By adopting the technical scheme, the return spring can ensure that the plug is reliably inserted into the near-end slotted hole or the far-end slotted hole, so that the whole device is more reliable in use; meanwhile, the user can conveniently adjust the position of the inner barrel after pressing the outer cover to compress the return spring, and the use is more convenient.

The present invention in a preferred example may be further configured to: the supporting arm comprises a connecting rod, an extension rod and an I-shaped rod, wherein one end of the connecting rod is fixedly connected with the end part of the rotating shaft, one end of the extension rod is fixedly connected with the connecting rod, and one end of the I-shaped rod is fixedly connected to the other end of the extension rod and has an I-shaped cross section; the inner cylinder comprises a rectangular pipe section with a rectangular opening section and an I-shaped pipe section which is coaxial with the rectangular pipe section and one end of which is communicated with the rectangular pipe section, and the inner cavity of the I-shaped pipe section is matched with the section of the I-shaped rod.

By adopting the technical scheme, the sliding linearity of the inner cylinder is better due to the matching of the I-shaped rod on the supporting arm and the I-shaped pipe containing section, the whole sliding process is smoother and more reliable, and a user can adjust the inner cylinder more conveniently and quickly.

The present invention in a preferred example may be further configured to: the treading piece comprises two rotating connecting rods and a pedal fixedly connected between the two rotating connecting rods; the rotary connecting rod is rotatably connected with the inner side of the outer barrel, an unfolding placing table is arranged on the outer barrel, a placing edge is arranged on the rotary connecting rod and close to one side of the unfolding placing table, and when the rotary connecting rod rotates outwards to unfold, the placing edge is placed on the unfolding placing table.

By adopting the technical scheme, when in use, a user generally adjusts the pedals, sits on the cushion and then steps on the pedal part by the feet; if the whole length of the pedal is longer, people can be prevented from sitting on the cushion, and inconvenience is brought to users; the treading piece can be rotated and folded by arranging the rotating connecting rod, and a user can unfold the treading piece after sitting on the cushion, so that the use is more convenient; the placing edge and the placing platform are unfolded to ensure that the treading piece has enough supporting capacity and can reliably support the weight of the legs of the human body.

The present invention in a preferred example may be further configured to: a folding placing table is arranged on the outer barrel, and when the rotating connecting rod rotates inwards to be folded, the rotating connecting rod is placed on the folding placing table; meanwhile, a positioning hole is formed in the outer cylinder above the folding placing table, a bead jacking screw is fixedly connected to the rotating connecting rod, and the output end of the bead jacking screw corresponds to the positioning hole.

By adopting the technical scheme, under the normal condition, when the rotating connecting rod is in a folded state, the top bead on the top bead screw is just embedded into the positioning hole, and the cooperation of the top bead and the positioning hole can prevent the treading piece from further rotating downwards; however, in practical use, a user generally exerts a large force before turning over the rotating connecting rod and sitting on the cushion, and the rotating connecting rod is easy to rotate over; the folding placing table can limit the continuous downward rotation of the rotating connecting rod after folding, thereby avoiding the occurrence of the situation and being convenient to use; when the rotating connecting rod rotates and is folded, and the supporting arm is rotated to the lower part of the cushion through reverse rotation, the cooperation of the bead-ejecting screw and the positioning hole only needs to overcome the gravity of the treading piece, no artificial external force exists, and therefore the rotating connecting rod is enabled to be reliably kept in a folded state.

In summary, the invention includes at least one of the following beneficial technical effects:

1. by arranging the pedals, a user can step feet on the pedals after sitting on the cushion, so that the lower legs, the upper legs and the upper trunk can keep better blood circulation, the body health of a sedentary person is benefited, and the pedals can be folded when not used, so that the chair is beneficial to common use;

2. the angle adjusting seat has simple and reliable structure, and the supporting arms can be unfolded or folded conveniently;

3. the sliding component is more reliable and convenient to adjust, so that the pedal is more convenient and faster to use;

4. trample the piece and can fold, be convenient for in the use people sit the cushion, also be convenient for accomodate the cushion below under the condition that does not use, whole occupation space is less, and it is comparatively convenient to use.

Drawings

Fig. 1 is a schematic view of the structure of the foothold.

Fig. 2 is a schematic view showing a structure of the holder.

Fig. 3 is a schematic view showing a structure of a snap ring in an angle adjusting base.

FIG. 4 is a schematic view showing the structure of the push rod, snap ring, and rotary shaft.

FIG. 5 is a schematic view showing a fitting form of the outer cylinder and the inner cylinder.

Fig. 6 is a schematic view showing a fitting form of the positioning member and the adjustment hole.

FIG. 7 is a sectional view showing the fitting form of the outer cylinder, the inner cylinder and the I-shaped rod.

Fig. 8 is a schematic view showing the structure of the stepping member.

In the figure, 1, a fixed seat; 10. a side plate; 11. a base plate; 12. an end panel; 120. a shaft hole; 13. a limiting cylinder; 130. an arc-shaped bulge; 131. an arc caulking groove; 2. an angle adjusting seat; 20. a rotating shaft; 200. a hole of abdication; 21. a snap ring; 210. an arc-shaped panel; 211. a limiting hole; 22. a push rod; 220. a convex column; 23. a tension spring; 24. pressing the button; 3. a support arm; 30. a connecting rod; 31. an extension rod; 32. an I-shaped rod; 320. an adjustment hole; 321. a proximal slot; 322. a distal slot; 4. a slipping component; 40. an inner barrel; 400. a rectangular tube section; 401. an I-shaped pipe section; 402. a first through hole; 403. a second through hole; 404. blocking edges; 405. a clamping block; 41. an outer cylinder; 410. a position clamping hole; 411. unfolding the placing table; 412. folding the placing table; 413. mounting holes; 414. positioning holes; 42. a positioning member; 420. a plug; 421. a trigger lever; 422. an outer cover; 423. a return spring; 5. a tread member; 50. rotating the connecting rod; 500. placing edges; 51. a pedal; 52. a ball-top screw.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the pedal for an ergonomic chair disclosed in the present invention comprises a fixing base 1 fixed to a lower portion of a seat cushion of the chair, an angle adjusting base 2 installed in the fixing base 1 for adjusting a supporting arm 3 to be in a use or folded state, a sliding assembly 4 slidably connected to the supporting arm 3 for extending a length of the supporting arm 3, and a pedal member 5 fixedly connected to the sliding assembly 4 for supporting a foot of a human body.

Referring to fig. 1 and 2, the fixing base 1 includes two opposite side plates 10, a bottom plate 11 fixedly connected between bottoms of the two side plates 10, and two end plates 12 fixedly connected to two ends of the two side plates 10 and fixedly connected to the bottom plate 11, wherein the side plates 10, the bottom plate 11, and the end plates 12 are integrally formed, and preferably made of plastic. The side plates 10, the bottom plate 11 and the end plates 12 are enclosed to form a long-strip groove with an open top, the two end plates 12 are provided with shaft holes 120, and the axes of the two shaft holes 120 coincide with the length direction axis of the long-strip groove. The upper edge of the side plate 10 is turned outwards to form a connecting part, and a through threaded hole is formed in the connecting part along the length direction; the fixing seat 1 can be fixed on the lower part of the cushion by using screws to penetrate through the connecting parts. A limiting cylinder 13 is fixedly connected in the long groove, and the axis of the limiting cylinder 13 is overlapped with the axis of the shaft hole 120. An arc-shaped bulge 130 protrudes in the limiting cylinder 13, and two arc-shaped caulking grooves 131 are formed by matching the arc-shaped bulge 130 with the inner wall of the limiting cylinder 13; the two arc caulking grooves 131 are distributed up and down.

Referring to fig. 1, 2 and 3, the angle adjusting base 2 includes a rotating shaft 20, the middle of the rotating shaft 20 passes through the limiting cylinder 13, and both ends of the rotating shaft pass through the shaft hole 120. The rotating shaft 20 is sleeved with a snap ring 21, the inner diameter of the snap ring 21 is larger than the outer diameter of the rotating shaft 20, an arc-shaped panel 210 is axially and convexly arranged on the snap ring 21, the outer diameter of the snap ring 21 is matched with the inner diameter of the limiting cylinder 13, and the arc-shaped panel 210 is matched with any one arc-shaped caulking groove 131. Referring to fig. 4, the rotating shaft 20 is a hollow structure, a strip-shaped yielding hole 200 is formed in the middle of the rotating shaft 20, and the length direction of the yielding hole 200 is parallel to the length direction of the rotating shaft 20 and is communicated with the inside of the rotating shaft 20. A push rod 22 penetrates through the rotating shaft 20, a convex column 220 is fixedly connected to the push rod 22, the diameter of the convex column 220 is smaller than the width of the abdicating hole 200 and extends out of the abdicating hole 200, a limiting hole 211 is formed in the clamping ring 21, and the convex column 220 penetrates through the limiting hole 211. The two ends of the rotating shaft 20 are cut to form planes, the section of each plane is D-shaped, and the supporting arms 3 are sleeved on the end parts of the rotating shaft 20 and are in tight fit with each other. A telescopic spring 23 is sleeved on the rotating shaft 20, one end of the telescopic spring 23 is abutted against the supporting arm 3, and the other end of the telescopic spring is elastically abutted against the clamping ring 21; the arc panels 210 and the expansion springs 23 are respectively located at both sides of the retainer ring 21.

A pressing button 24 is fixedly connected to one end of the push rod 22 outside the rotating shaft 20, and the snap ring 21 can be synchronously pushed in the direction of separating from the arc caulking groove 131 by operating the pressing button 24 to compress the extension spring 23; when the arc-shaped panel 210 on the snap ring 21 is separated from the arc-shaped caulking groove 131, the rotation of the rotating shaft 20 is not restricted any more, and the supporting arm 3 can be rotated to the use state, i.e. the state that the supporting arm 3 is horizontally arranged, such as the state of the supporting arm 3 in fig. 1, or the folding state, i.e. the supporting arm 3 rotates to the lower side of the seat cushion in the reverse direction (from top to bottom around the rotating shaft 20); then, the pressing button 24 is released, the extension spring 23 restores the length thereof, and pushes the arc-shaped panels 210 to be inserted into the corresponding arc-shaped slots 131, thereby restricting the rotation of the rotating shaft 20 and maintaining the support arm 3 in the use or folded state.

Referring to fig. 6, the supporting arm 3 includes a connecting rod 30 having one end sleeved on the end of the rotating shaft 20 and tightly fitted with each other, an extending rod 31 having one end integrally connected to the connecting rod 30, and an i-shaped rod 32 having one end integrally connected to the other end of the extending rod 31 and having an i-shaped cross section. A strip-shaped adjusting hole 320 is formed in the I-shaped rod 32 in the horizontal direction, a near-end slot hole 321 is communicated with one end, close to the extension rod 31, of the adjusting hole 320, a far-end slot hole 322 is communicated with one end, far away from the extension rod 31, of the adjusting hole 320, and the diameters of the near-end slot hole 321 and the far-end slot hole 322 are the same and larger than the width of the adjusting hole 320.

Referring to fig. 5, the sliding assembly 4 includes an inner cylinder 40 sleeved on the extension rod 31 and the i-shaped rod 32, an outer cylinder 41 sleeved outside the inner cylinder 40 and fixedly connected with the inner cylinder 40, and a positioning member 42 for positioning the sliding position of the inner cylinder 40 on the support arm 3. The inner cylinder 40 comprises a rectangular pipe section 400 with a rectangular opening section, an I-shaped pipe section 401 which is coaxial with the rectangular pipe section 400 and one end of which is communicated with the rectangular pipe section 400, a blocking edge 404 which is arranged at one end of the rectangular pipe section 400, which is far away from the I-shaped pipe section 401, and a fixture block 405 which is fixedly connected to the inward side of the rectangular pipe section 400, wherein one side of the fixture block 405, which is far away from the blocking edge 404, is provided with an inclined surface, and one side, which is opposite to the; the inner cavity of the I-shaped pipe section 401 is matched with the section of the I-shaped rod 32, so that the inner cylinder 40 can slide more smoothly.

The outer cylinder 41 is provided with a clamping hole 410 at a position corresponding to the clamping block 405, the clamping block 405 is clamped in the clamping hole 410, and the axial movement of the outer cylinder 41 is limited by the blocking edge 404 and the vertical surface of the clamping block 405. The inclined surface of the latch 405 facilitates the installation of the outer tube 41, the outer tube 41 has a certain deformation capability, the end of the outer tube 41 gradually expands and goes over the latch 405 when the outer tube 41 is pushed forcibly, until the latch 405 enters the latch hole 410, and the end of the outer tube 41 is restored to the original shape. The latch 405 may hinder the installation of the outer cylinder 41, but the installation may be completed by applying force, and the outer cylinder 41 is preferably made of plastic or aluminum alloy material, which may have both strength and installation convenience. The step member 5 is mounted on the outer cylinder 41.

Referring mainly to fig. 7, and with reference to fig. 5 and 6, a first through hole 402 and a second through hole 403 are formed in the i-shaped pipe section 401 in a manner of being opposite to the installation position of the positioning member 42, the diameter of the first through hole 402 is larger than that of the second through hole 403, a circle center connecting line of the first through hole 402 and the second through hole 403 is in a horizontal state, the first through hole 402 is located on the inner side, and the second through hole 403 is located on the outer side. An installation hole 413 is formed in the outer cylinder 41 in the horizontal direction corresponding to the installation position of the positioning member 42.

The positioning member 42 comprises a plunger 420, a trigger rod 421 with one end fixedly connected to the plunger 420, an outer cover 422 fixedly connected to the other end of the trigger rod 421, and a return spring 423 sleeved on the trigger rod 421 and having one end abutting against the outer cover 422 and the other end abutting against the i-shaped pipe section 401; the outer diameter of the plug 420 is matched with the first through hole 402, a round end is arranged at the end part of the plug 420, and the diameter of the round end is larger than that of the plug 420 and is matched with the mounting hole 413; the diameter of the plug 420 is larger than that of the trigger rod 421, in this example, the plug 420 is provided with an internal thread, the end of the trigger rod 421 is provided with an external thread, and the two are connected by a thread; in addition, the plug 420 and the trigger bar 421 can also be fixed by other common fixing methods such as adhesion, insertion, clamping, fastener fixing, etc. The diameter of the trigger bar 421 is adapted to the second through hole 403. The outer cover 422 has a diameter larger than that of the trigger bar 421 and is fitted into the mounting hole 413. The plug 420 has a diameter that fits the proximal and

distal slots

321, 322 and a diameter that is greater than the width of the adjustment aperture 320. The diameter of the trigger bar 421 is smaller than the width of the adjustment aperture 320. After the return spring 423 completes compressing, the plug 420 can exit the proximal slot 321 or the distal slot 322.

Referring mainly to fig. 7 in conjunction with fig. 5 and 6, when the sliding assembly 4 is used, the outer cover 422 is pressed to push the plug 420 to exit from the proximal slot 321 or the distal slot 322 and to make the trigger bar 421 enter the proximal slot 321 or the distal slot 322; then, the outer cylinder 41 can be moved back and forth to perform shortening or extension adjustment; when the position is adjusted to the corresponding position, the outer cover 422 is released, and the plunger 420 enters the corresponding proximal slot 321 or distal slot 322 under the action of the return spring 423, so as to prevent the outer cylinder 41 from sliding and position the stepping member 5.

Referring to fig. 8, the treading member 5 includes two rotating connecting rods 50, a pedal 51 fixedly connected between the two rotating connecting rods 50, and a ball-pushing screw 52, wherein grooves are uniformly formed on the upper surface of the pedal 51 to form a rough surface, so that the foot of a user is not easy to slip when treading. Referring to fig. 3 and 5, a first rotary seat hole is formed in the rotary connecting rod 50, a second rotary seat hole is formed in the end of the outer tube 41 away from the supporting arm 3, and a pin shaft is matched in the first rotary seat hole and the second rotary seat hole. The rotating connecting rod 50 is rotatably connected with the inner side of the outer cylinder 41 by a pin shaft, an unfolding placing table 411 is arranged below the outer cylinder 41 corresponding to the second rotating seat hole, a placing edge 500 is arranged on one side of the rotating connecting rod 50 close to one end of the first rotating seat hole, and when the rotating connecting rod 50 rotates outwards and unfolds, the placing edge 500 is placed on the unfolding placing table 411. A folding placing table 412 is provided on the outer cylinder 41, and when the rotating link 50 is rotated inward to be folded, as in the state of fig. 3, the rotating link 50 is placed on the folding placing table 412; meanwhile, a positioning hole 414 is formed in the outer cylinder 41 above the folding platform 412, a ball-ejecting screw 52 is fixedly connected to the rotary connecting rod 50, and a ball-ejecting screw 52 is inserted into the positioning hole 414. In this example, the ball screw 52 may be any one of the ball screws 52 commonly available in the market, and the main working principle is to provide a compression spring inside the screw, and the compression spring pushes the ball to make a part of the ball protrude out of the end of the screw, so as to provide a certain resistance; when the force is larger than the elastic force of the compression spring, the compression spring retracts, and the top ball loses the blocking effect; common similar structures such as spring jumping beans and the like can also be adopted.

The implementation principle of the embodiment is as follows: when the user pedals, the supporting arm 3 is positively rotated to a horizontal position from the lower part of the cushion, namely a using state, such as the position in fig. 1, the rotating connecting rod 50 is placed on the unfolding placing table 411, then the positioning piece 42 is pressed, and the outer cylinder 41 slides out, so that the user can step feet on the pedal 51 after sitting on the cushion, and the lower leg and the upper leg can have better blood circulation after being supported and the upper body can have better blood circulation; when the pedal is not used, the rotating connecting rod 50 is firstly placed on the folding placing table 412, the bolt 52 is propped against and matched with the positioning hole 414, then the positioning piece 42 is pressed, the outer cylinder 41 is slidingly retracted, and then the supporting arm 3 is rotated to the lower part of the cushion, namely, the folding state, so that the whole pedal is folded below the cushion. The whole pedal is comfortable when in use, and is convenient to fold after being used, thereby being very beneficial to the physical health of sedentary people.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A footrest for an ergonomic chair, comprising: including fixing base (1), support arm (3) that are fixed in chair cushion lower part, install in fixing base (1) and be used for adjusting angle modulation seat (2) that support arm (3) are in the use or receive and fold the state, sliding connection is used for prolonging sliding assembly (4) of support arm (3) length on support arm (3) to and rigid coupling is used for supporting on sliding assembly (4) that the human foot steps on piece (5).

2. The footrest for an ergonomic chair of claim 1, wherein: a limiting cylinder (13) is fixedly connected to the fixed seat (1); an arc-shaped bulge (130) is protruded in the limiting cylinder (13), and at least two arc-shaped caulking grooves (131) are formed on the arc-shaped bulge (130) and matched with the inner wall of the limiting cylinder (13); the angle adjusting seat (2) comprises a rotating shaft (20), and the middle part of the rotating shaft (20) penetrates through the limiting cylinder (13); a snap ring (21) is arranged on the rotating shaft (20), an arc-shaped panel (210) is arranged on the snap ring (21) in a protruding mode along the axial direction, the outer diameter of the snap ring (21) is matched with the inner diameter of the limiting cylinder (13), and the arc-shaped panel (210) is matched with any one arc-shaped caulking groove (131); the supporting arm (3) is fixedly connected to the end part of the rotating shaft (20).

3. The footrest for an ergonomic chair of claim 2, wherein: the clamping ring (21) is connected to the rotating shaft (20) in a sliding manner; a strip-shaped abdicating hole (200) is formed in the middle of the rotating shaft (20); a push rod (22) is connected in the rotating shaft (20) in a sliding manner, a convex column (220) is fixedly connected to the push rod (22), and the convex column (220) extends out of the abdicating hole (200) and is inserted into the clamping ring (21); an expansion spring (23) is arranged between the supporting arm (3) and the clamping ring (21); the arc panel (210) and the expansion spring (23) are respectively positioned at two sides of the snap ring (21).

4. The footrest for an ergonomic chair according to claims 1 or 2, characterized in that: the sliding component (4) comprises an inner cylinder (40) sleeved on the supporting arm (3), an outer cylinder (41) sleeved outside the inner cylinder (40) and fixedly connected with the inner cylinder (40), and a positioning part (42) used for positioning the sliding position of the inner cylinder (40) on the supporting arm (3).

5. The footrest for an ergonomic chair of claim 4, wherein: a strip-shaped adjusting hole (320) is formed in the supporting arm (3) along the horizontal direction, a near-end slotted hole (321) is communicated with one end, close to the rotating shaft (20), of the adjusting hole (320), a far-end slotted hole (322) is communicated with one end, far away from the rotating shaft (20), of the adjusting hole (320), and the near-end slotted hole (321) and the far-end slotted hole (322) are the same in diameter and larger than the width of the adjusting hole (320); the positioning part (42) comprises a plug column (420) and a trigger rod (421) of which one end is fixedly connected with the plug column (420); the diameter of the plug (420) is larger than that of the trigger rod (421); the inner cylinder (40) is provided with a first through hole (402) and a second through hole (403) for the plug column (420) and the trigger rod (421) to penetrate out; the outer cylinder (41) is provided with a mounting hole (413) for the plug column (420) and the trigger rod (421) to penetrate out; the diameter of the plug (420) is matched with the proximal slotted hole (321) and the distal slotted hole (322), and the diameter of the plug is larger than the width of the adjusting hole (320); the diameter of the trigger rod (421) is smaller than the width of the adjusting hole (320).

6. The footrest for an ergonomic chair of claim 5, wherein: a round end head is arranged at the end part of the plug column (420), and the diameter of the round end head is larger than that of the plug column (420) and is matched with the mounting hole (413); an outer cover (422) is fixedly connected to one end, far away from the plug column (420), of the trigger rod (421), and the diameter of the outer cover (422) is larger than that of the trigger rod (421) and matched with the mounting hole (413).

7. The footrest for an ergonomic chair of claim 6, wherein: a return spring (423) having one end abutting against the outer cover (422) and the other end abutting against the support arm (3) is sleeved on the trigger rod (421).

8. The footrest for an ergonomic chair of claim 4, wherein: the supporting arm (3) comprises a connecting rod (30) with one end fixedly connected with the end part of the rotating shaft (20), an extension rod (31) with one end fixedly connected with the connecting rod (30), and an I-shaped rod (32) with one end fixedly connected with the other end of the extension rod (31) and the cross section of the I-shaped rod; the inner cylinder (40) comprises a rectangular pipe section (400) with a rectangular opening section and an I-shaped pipe section (401) which is coaxial with the rectangular pipe section (400) and one end of which is communicated with the rectangular pipe section (400), and the inner cavity of the I-shaped pipe section (401) is matched with the section of the I-shaped rod (32).

9. The footrest for an ergonomic chair of claim 4, wherein: the treading piece (5) comprises two rotating connecting rods (50) and a pedal (51) fixedly connected between the two rotating connecting rods (50); the rotating connecting rod (50) is rotatably connected with the inner side of the outer cylinder (41), an unfolding placing table (411) is arranged on the outer cylinder (41), a placing edge (500) is arranged on one side, close to the unfolding placing table (411), of the rotating connecting rod (50), and when the rotating connecting rod (50) rotates outwards to be unfolded, the placing edge (500) is placed on the unfolding placing table (411).

10. The footrest for an ergonomic chair of claim 9, wherein: a folding placing table (412) is arranged on the outer cylinder (41), and when the rotating connecting rod (50) rotates inwards to be folded, the rotating connecting rod (50) is placed on the folding placing table (412); meanwhile, a positioning hole (414) is formed in the outer cylinder (41) above the folding placing table (412), a bead jacking screw (52) is fixedly connected to the rotating connecting rod (50), and the output end of the bead jacking screw (52) corresponds to the positioning hole (414).