TWI801677B - A fixture of a chair foot ring - Google Patents

Abstract

The present invention discloses a fixture of a chair foot ring, comprising a seat, a prop, a socket and a position unit. The prop is erected at the bottom of the seat, and the center of the foot ring comprises a socket ring. The socket disposed in the socket ring is a tube with a conical inner surface including an inner thread, and the diameter of the inner surface is gradually enlarged. The position unit including a plurality opening is another tube set on the prop, and each opening is embeds with a movable brake. The outer surface of each brake includes an outer thread and slightly protrudes from the position unit to form a conical shape that matches the socket. The outer thread may screw with the abovementioned inner surface of the socket. The socket is interlocked with the foot ring. When the foot ring rotates in one direction, the socket presses the brake to move toward the prop, so that the foot ring is clamped on the prop.

Description

Chair ring fixing structure

The present invention relates to a chair, in particular to a foot ring fixed on the chair to provide rest for the feet.

Some chairs are equipped with pedal rings on the pillars for users to rest their feet. Since the pedal rings must adjust their height and position according to the needs of users, they must be able to slide and move on the pillars. position.

Inventors US9,578,969 and US9,706,849 disclose adjustable pedal rings, which use a lever-type quick-release device for sliding and positioning, although the lever-type quick-release device can provide excellent clamping force and operation Convenience, but the cost of using the lever-type quick-release device on the fixed structure of the pedal ring is relatively high. For some products whose main consideration is low cost, the lever-type quick-release device cannot provide price competition Force, but it is necessary to find other adjustable fixtures.

In addition, this US9,706,849 patent also adds a plurality of shrapnel integrated with the base on the base of a fixed pedal ring, and these shrapnel are pressed against the pillar by extrusion deformation to increase the pedal ring clamping force, although effectively It helps to fix the pedal ring after the position is changed, but one end of the shrapnel is fixed on the base, so that the deformed block and angle are limited, and the clamping force provided is not comprehensive enough, so it can only be used as a Auxiliary but unable to completely replace the lever-type quick-release device; in addition, when the elastic fatigue of these shrapnel occurs, it is unusable and the entire base must be replaced to cause waste. Moreover, the design of this base, the surface of which is all threaded, consumes a lot of manufacturing cost, which is the reason why the cost cannot be reduced more effectively.

The main purpose of the present invention is to provide a chair pedal ring fixing structure, which can take into account stable clamping force and low manufacturing cost, especially suitable for low-cost manufacturing of pedal rings, but without sacrificing the convenience of operation In particular, the design of the brake block and the positioning seat (i.e. the base of the prior art) as a fixed and brake pedal ring is completely separated and movable. If it can be replaced independently because of wear or deformation, it is very important for the user The cost of purchase can also be reduced.

In order to achieve the above object, the chair pedal ring fixing structure of the present invention includes a seat cushion, a pillar, a seat and a positioning seat, the pillar is fixed upright on the bottom of the seat cushion, and a set of seat ring is arranged in the center of the pedal ring. Ring, the sleeve is fixed in the ring, it is a pipe body with a tapered inner surface, the diameter of the inner surface gradually expands and is provided with internal threads, the positioning seat is a set of pipe body fixed on the pillar , with a plurality of openings, each opening is embedded with a movable brake block, the outer surface of each brake block slightly protrudes from the positioning seat, and forms a tapered shape matching the sleeve and is provided with an outer screw The outer thread and the inner thread of the sleeve can be screwed together. The sleeve is linked with the pedal ring. When the pedal ring rotates in one direction, the sleeve presses the brake block to move toward the pillar to make the pedal A ring is clamped to the post.

Another preferred solution is: each of the brake blocks includes a body and a brake pad, wherein the inner surface of the brake pad is provided with diamond-shaped friction lines to enhance its braking ability.

Another preferred solution is: the two opposite sides of the body of the brake block are respectively formed with a step edge, and the two corresponding sides of the opening of the positioning seat are provided with ribs corresponding to the step edge. Block against the step edge, so that the positioning seat produces an inward stop for the brake block, preventing the brake block from falling into the positioning seat from the opening; wherein, the gap between the step edge of the brake block and the rib of the corresponding positioning seat An activity space is reserved between them, so that the brake block can move toward the pillar after being pressed.

Another preferred solution is: the body of the brake block is extended downward with a hook, and a button hole is provided under the opening of the positioning seat to allow the hook to be fixed therein; the button hole and A bridge plate is arranged between the openings, and the hook is hooked on the bridge plate so that the main body is positioned against the opening. In addition, the outer edge of the hook is further provided with a protruding step plate, and the opposite side of the button hole of the positioning seat is provided with a block corresponding to the step plate, and the block block prevents the brake block from turning outward; Therefore, when the brake block is assembled on the positioning seat, it is limited to move between the step edge and the blocking plate without breaking away from the positioning seat.

1‧‧‧chair

11‧‧‧Pillar

12‧‧‧Cushion

2‧‧‧pedal ring

21‧‧‧ring body

211‧‧‧collar

212‧‧‧card slot

213‧‧‧spokes

22‧‧‧positioning seat

221‧‧‧opening

2211‧‧‧Front

2212‧‧‧bridge

2213‧‧‧Block

2214‧‧‧button hole

222‧‧‧brake block

2221‧‧‧brake pad

2222‧‧‧Body

2223‧‧‧External thread

2224‧‧‧Hook

2225‧‧‧groove

2226‧‧‧Positioning hole

2227‧‧‧Positioning convex body

2228‧‧‧step edge

2229‧‧‧Friction pattern

2230‧‧‧step board

223‧‧‧flange

224‧‧‧Expansion joint

23‧‧‧seat

23a, 23b‧‧‧semi-circular shell

231‧‧‧block

232‧‧‧Conical inner surface

233‧‧‧Internal thread

G‧‧‧Activity Space

Fig. 1 is a schematic view of the overall appearance of the chair used in the present invention.

Fig. 2 is a three-dimensional exploded view of the pedal ring structure of the present invention.

Fig. 3 is a three-dimensional appearance view of the brake block of the present invention.

Fig. 4 is a three-dimensional exploded view of the brake block of the present invention.

Fig. 5 is a three-dimensional appearance view of the positioning seat of the present invention.

Fig. 6 is a side view of the positioning seat of the present invention.

Fig. 7 is a longitudinal sectional view of the positioning seat of the present invention.

Fig. 8 is a transverse sectional view of the positioning seat of the present invention.

Fig. 9 is a cross-sectional view of the pedal ring of the present invention when it is assembled on a pillar.

Fig. 10 is a sectional view of the pedal ring of the present invention locked to the pillar.

Hereby, the structure and features of the present invention are described in detail in conjunction with the drawings, so as to make them more clear.

The "upper" and "lower" directions referred to in the following explanations and scope of patent application are based on the normal upright use state of the chair 1 on the ground (horizontal plane) as shown in Figure 1, that is, the seat cushion 12 is generally in a horizontal direction, and the seat cushion 12 The surface for people to sit on is the direction facing "up", and the direction opposite to this direction and facing the ground is "down"; and the "inside" and "outside" directions are "inside" toward the center of the chair 1, and Towards the outside of the chair 1 is "outside". As for the pedal ring 2 referred to in the present invention, it is an annular body assembled on the upright support 11 (such as an air pressure rod) under the seat cushion 12 of the chair 1, so that the user of the chair 1 can step on the pedal ring 2 with the sole of the foot Go to rest.

Referring to Fig. 2, the pedal ring 2 includes a ring body 21, a ring 211 positioned at the center of the ring body 21, a plurality of spokes 213 connected between the ring body 211 and the ring body 21, and the ring body 211 There is a card groove 212 on the surface of the sleeve, and the sleeve 23 is axially fixed in the sleeve ring 211, and is attached to the inner wall of the sleeve ring 211. In the disclosed embodiment, the sleeve 23 is composed of two semicircular Cylindrical tube formed by shaped shells 23a, 23b, but not limited thereto. The sleeve 23 has a tapered inner surface 232, the diameter of the tapered inner surface 232 gradually expands, and is provided with an internal thread 233, and the outer surface of the sleeve 23 is protruded with a block 231, the block 231 can be fitted into the draw-in groove 212 of the collar 211 to form a positioning effect, so that the sleeve seat 23 and the collar 211 are fixedly connected as one and linked together; and a positioning seat 22, which is a hollow pipe body , axially sleeved on the pillar 11, the lower end of the positioning seat 22 protrudes outward to form a flange 223, so that the user can hold the flange 223 and fix the positioning seat 22, the wall of the positioning seat 22 has multiple Openings 221, in the illustrated embodiment, the number of openings 221 is three, evenly distributed on the wall of the positioning seat 22, but not limited thereto, each opening 221 is embedded with a movable brake block 222, each brake block 222 The inner surface is attached to the pillar 11 . Preferably, the positioning seat 22 defines an expansion joint 224 axially between any two openings 221 , so that the positioning seat 22 has the ability of elastic strain when being squeezed.

Continued Please also refer to Figure 3 to Figure 7. The brake block 222 is composed of a body 2222 and a brake pad 2221. The surface of the body 2222 is provided with a groove 2225, which can accommodate the brake pad 2221 to be embedded in it, preferably outside the brake pad 2221. One or two positioning protrusions 2227 are protruded on the surface, and corresponding positioning holes 2226 are opened in the groove 2225 of the body 2222, so that the positioning protrusions 2227 can be inserted into the positioning In the positioning hole 2226, the positioning effect of the brake pad 2221 on the body 2222 is enhanced; in addition, the inner surface of the brake pad 2221 is also provided with diamond-shaped friction lines 2229 as shown in FIG. Better stopping power.

At least one hook 2224 extends downward from the lower edge of the body 2222 . In the embodiment shown in FIG. 3 , the number of the hooks 2224 is two, but not limited thereto. The two opposite sides of the main body 2222 are respectively formed with a step edge 2228, and the two corresponding sides of the opening 221 of the positioning seat 22 are provided with a rib 2211 corresponding to the step edge 2228, as shown in FIG. 5 . The rib 2211 is used to block the step edge 2228 , so that the positioning seat 22 forms an inward stop for the brake block 222 , preventing the brake block 222 from falling into the positioning seat 22 from the opening 221 . In addition, a buckle hole 2214 is provided below the opening 221 to allow the hook 2224 of the brake block 222 to be fixed therein, and a bridge plate 2212 and hook 2224 are provided between the buckle hole 2214 and the opening 221. It can be hooked on the bridge plate 2212 so that the brake block 222 can be positioned against the positioning seat 22 to facilitate subsequent assembly and can be driven. Preferably, the outer edge of the hook 2224 is further provided with a protruding step 2230, and the opposite side of the button hole 2214 of the positioning seat 22 is provided with a blocking piece 2213 corresponding to the stepping plate 2230, using the blocking piece 2213 Blocking the step plate 2230 can prevent the brake block 222 from falling outwards. In other words, when the brake block 222 is assembled on the positioning seat 22, it is restricted to move between the rib 2211 and the blocking piece 2213 without breaking away from the block. Positioning seat 22.

Referring to Fig. 8, after the brake block 222 is assembled on the positioning seat 22, the positioning seat 22 and the inner wall surface of the brake pad 2221 jointly form a cylindrical wall surface, and its inner diameter is slightly equivalent to the outer diameter of the pillar 11 of the chair 1. And the inner surface of the brake pad 2221 is Slightly protrudes from the inner surface of the positioning seat 22 . In addition, there is a movable space G between the step edge 2228 of the brake block 222 and the rib 2211 of the corresponding positioning seat 22, so that the brake block 222 can move toward the pillar 11 after being pressed, and the brake pad 2221 The friction lines 2229 are attached to the surface of the pillar 11, and the friction lines 2229 are pressed against the surface of the pillar 11 to generate a braking force.

As shown in Figure 6 and Figure 7, the outer surface of the brake block 222 slightly protrudes from the positioning seat 22, and forms a matching taper with the inner surface 232 of the sleeve seat 23, the diameter of which gradually expands, and each The outer surface of the body 2222 of the brake block 222 is further provided with an external thread 2223 that can be screwed with the internal thread 233 of the sleeve 23, so that when the sleeve 23 is rotated under force, each brake block 222 can be driven to move toward the pillar 11 at the same time .

Finally, please refer to Figure 9 and Figure 10. After the pedal ring 2 is set up on the pillar 11 of the chair 1, the plurality of brake pads 2221 on the positioning seat 22 are close to or even in contact with the surface of the pillar 11, but the pedal ring 2 can still slide freely on the pillar 11 to change its position , as shown in Figure 9.

After the height position of the pedal ring 2 is determined, as shown in FIG. Seat 23, so that the internal thread 233 of the sleeve 23 and the external thread 2223 of the plurality of brake blocks 222 are screwed together, and the outer surface of the brake block 222 is matched with the tapered design of the inner surface 232 of the sleeve 23, so that The sleeve 23 squeezes the plurality of brake blocks 222 to move toward the pillar 11, and the brake pad 2221 is pressed against the surface of the pillar 11 to generate a braking force so that the pedal ring 2 is clamped on the pillar 11, and no longer It can be done with the help of the lever type quick release device of the prior art. Conversely, if the pedal ring 2 needs to be replaced again, as long as the ring body 21 is reversed to release the suppression of the plurality of brake blocks 222 to the pillar 11, the position can be changed back to the free state shown in FIG. 9 .

11‧‧‧Pillar

2‧‧‧pedal ring

21‧‧‧ring body

211‧‧‧collar

212‧‧‧card slot

213‧‧‧spokes

22‧‧‧positioning seat

221‧‧‧opening

2211‧‧‧Front

2212‧‧‧bridge

2214‧‧‧button hole

222‧‧‧brake block

2221‧‧‧brake pad

2223‧‧‧External thread

2224‧‧‧Hook

2228‧‧‧step edge

223‧‧‧flange

23‧‧‧seat

23a, 23b‧‧‧semi-circular shell

231‧‧‧block

232‧‧‧Conical inner surface

233‧‧‧Internal thread

Claims (9)

A pedal ring fixing structure of a chair, comprising: a seat cushion; a pillar, which is vertically connected to the bottom of the seat cushion; a pedal ring, which has a ring body and a ring connected with the ring body; a seat, It is axially sleeved in the collar and is a pipe body with a tapered inner surface. The diameter of the inner surface gradually expands downwards and is provided with internal threads; and a positioning seat is a hollow pipe body. It is sleeved on the pillar and has a plurality of openings. Each opening is embedded with a movable brake block. The outer surface of each brake block slightly protrudes from the positioning seat and forms a tapered shape matching the inner surface of the sleeve. The diameter gradually increases. Expanded and provided with external thread, the external thread is screwed with the internal thread of the sleeve, and a step edge is formed on the two opposite sides of the brake block, and the two corresponding sides of the opening of the positioning seat are provided with The rib corresponding to the step edge is used to block the step edge, so that the positioning seat produces an inward stop for the brake block, preventing the brake block from falling into the positioning seat from the opening; thereby, the The sleeve is linked with the pedal ring, and when the pedal ring rotates in one direction, the sleeve presses the brake block to move toward the pillar so that the pedal ring is clamped on the pillar. The pedal ring fixing structure of a chair according to claim 1, wherein each of the brake blocks includes a body and a brake pad. The pedal ring fixing structure of the chair according to claim 2, wherein the inner surface of the brake pad is provided with friction lines to enhance the braking ability. The pedal ring fixing structure of the chair as described in claim 2, wherein the inner surface of the main body is provided with a groove, which can accommodate the brake pad to fit in it, and the outer surface of the brake pad is provided with a positioning protrusion, and A corresponding positioning hole is opened in the groove of the body, so that the positioning protrusion can be inserted into the positioning hole to replace the brake pad. The pedal ring fixing structure of a chair according to claim 1, wherein there is a movable space between the step edge of the brake block and the rib of the corresponding positioning seat, so that the brake block can move toward the pillar after being compressed. The pedal ring fixing structure of a chair as described in any one of claims 1 to 5, wherein the brake block is extended downward with a hook, and a button hole is provided under the opening of the positioning seat to allow the hook to be fixed. In it, a bridge plate is arranged between the button hole and the opening, and the hook is hooked on the bridge plate so that the brake block is positioned on the opening. The pedal ring fixing structure of the chair as described in claim 6, wherein the outer edge of the hook is further provided with a protruding step plate, and the opposite side of the button hole of the positioning seat is provided with a block corresponding to the step plate , the block prevents the brake block from turning outwards. The pedal ring fixing structure of the chair as described in claim 1, wherein the surface of the collar is provided with a slot, and the outer surface of the seat is protruded with a block, and the block can be fitted into the collar. The socket and the collar are interlocked in the card slot. The pedal ring fixing structure of a chair as described in any one of claims 2 to 4, wherein after the brake block is assembled on the positioning seat, the inner surface of the brake pad is slightly protruding from the inner surface of the positioning seat and is more close to the pillar.

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