TWI714687B - Fastening structure for footrest ring of chair - Google Patents

Abstract

A pedal ring locking mechanism includes a hollow inner sleeve. The outer sleeve of the inner sleeve has a taper surface with threads distributed on the outer sleeve, and a continuous hole is formed on the taper surface. A deformable clip, and a gap through the longitudinal direction of the cone to provide deformation of the inner sleeve; a quick release device connected to the bottom end of the inner sleeve to control the size of the gap; and a hollow outer sleeve for The connecting foot ring has a conical surface that matches the conical surface of the inner sleeve, and is distributed with corresponding threads, which are connected to the outside of the inner sleeve through rotation; thereby providing the foot ring to be assembled in a labor-saving and convenient manner Chair, and has reliable stability.

Description

Foot ring locking mechanism

The pedal ring of the present invention is assembled on the chair to provide rest for the occupant's feet, and particularly refers to a locking mechanism for fixing the pedal ring on the chair.

In order to provide comfort when sitting on a chair, in addition to considering the functionality of the chair back or cushion, a footrest ring structure for resting the feet is also common on the pillars supporting the chair to stand, so that the user can use the footrest Ring to ease the support of the foot, especially after raising the seat cushion of the chair, or on a common high-leg seat.

Since the pedal ring is used as a support for the foot, it must be able to bear considerable weight, otherwise it will easily fall off or fall from the pillar of the chair; if it is light, just re-adjust and fix it. In severe cases, the foot may suddenly lose support and cause strain, or the foot ring may fall off and cause crushing or damage.

The inventor applied for an invention patent for a pedal ring locking mechanism on August 31, 2016, the application number is 105127967, in order to overcome the insufficient stability of the pedal ring when it is fixed. As shown in Figure 9, the application mainly includes a hollow inner sleeve 90 for sleeved on the pillar of the chair, with a tapered exterior and threads 91 distributed on the surface, and a penetrating longitudinal, Provide a gap 92 for the deformation of the inner sleeve 90; a quick release device 93 connected to the bottom end of the inner sleeve 90 to control the size of the gap 92; and, a hollow outer sleeve 94 for connecting the pedal ring 95, It has a tapered inner part that matches the inner sleeve 90, and is distributed with corresponding threads 96, which are connected to the outer part of the inner sleeve 90 through rotation. By locking the quick-folder 93, the inner sleeve 90 can be positioned on the pillar of the chair in advance and temporarily, and then the foot ring 95 can be rotated to engage the outer sleeve 94 with the inner sleeve 90. 95 fixed; Among them, the gap 92 of the inner sleeve 90 and its outer tapered design can help the pedal ring 95 to be fixed more tightly during operation, and its reliability is definitely better than in the past.

Although the buckle portion 97 is pressed by the rotational torque of the quick release device 93 to make the gap 92 smaller, the inner sleeve 90 can be deformed to generate a clamping force on the pillar of the chair to be fixed, and the outer sleeve 94 has a tapered surface The thread 96 is rotated and engaged with the inner sleeve 90. The rotating torsion force makes the gap 92 smaller and produces a stronger clamping force; however, because the inner sleeve 90 is integrally formed, it is designed to accept the outer sleeve through a tapered surface. The amount of variation produced by the rotary extrusion of the barrel 94 is small. In other words, the radial compression force directly generated on the pillar of the chair is still somewhat insufficient, and there is room for improvement.

The present invention is a "foot pedal ring locking mechanism", which is mainly a technology for fixing the pedal ring on the chair pillar. The locking mechanism includes a hollow inner sleeve to be sleeved on the chair pillar. It has a tapered surface with threads distributed on the outside, and has a section of hole on the tapered surface, so that a deformable clip is formed on the tapered surface, and a gap that penetrates the longitudinal direction of the tapered surface and provides deformation of the inner sleeve. ; A quick release device is connected to the bottom end of the inner sleeve to control the size of the gap; a hollow outer sleeve is used to connect the pedal ring, and the inner part has a cone surface that matches the cone surface of the inner sleeve, and Corresponding threads are distributed and connected to the outside of the inner sleeve through rotation.

The beneficial effect produced by the above locking mechanism is: the inner sleeve is connected with a quick release device, and the inner sleeve is temporarily positioned on the pillar of the chair through the lock of the quick release device, and then the pedal ring is rotated to make The outer sleeve and the inner sleeve can be joined to fix the pedal ring. This assembly method is more convenient and labor-saving than the prior art; moreover, the gap of the inner sleeve and the outer tapered surface design can help the pedal ring It is tighter when fixed, and in the process of rotating and joining the outer sleeve and the inner sleeve, the clip is also deformed toward the pillar of the chair due to external force and forms a clamping force on the pillar, so that the inner sleeve The tube can be more stably fixed on the pillar of the chair.

A‧‧‧Locking mechanism

1‧‧‧Inner sleeve

10‧‧‧Cone

11‧‧‧Gap

12‧‧‧Thread

13‧‧‧Fastening part

131‧‧‧through hole

14‧‧‧Cushion pad

141‧‧‧Corresponding hole

15‧‧‧Break hole

16‧‧‧Clip

161‧‧‧fixing hole

17‧‧‧Clip

171‧‧‧Friction pattern

172‧‧‧Locking part

100‧‧‧Chair

101‧‧‧Pillars

2‧‧‧Outer sleeve

21‧‧‧Cone

22‧‧‧Thread

23‧‧‧Through the slot

3‧‧‧Foot Ring

31‧‧‧Main body

311‧‧‧Locating slot

32‧‧‧Support Rod

33‧‧‧Anti-slip mat

4‧‧‧Quick release

41‧‧‧Through hole

5‧‧‧Bolt

6‧‧‧Nut

Fig. 1 is an external view of a chair assembled with the foot ring of the present invention.

Figure 2 is a completed view of the assembly of the pedal ring and the locking mechanism of the present invention.

Figure 3 is an exploded view of the locking mechanism of the present invention.

Fig. 4 is a diagram showing the structure of the inner sleeve of the present invention and the assembly relationship with the quick release device.

Figure 5 is a plan view of the inner sleeve of the present invention.

Fig. 6 is a side view of the pedal ring of the present invention assembled on a chair using a locking mechanism.

Fig. 7 is an operation diagram of the present invention, showing the use state of changing the height position of the foot ring.

Fig. 8 is an operation diagram of the present invention, showing the use state of Fig. 7 after the height position of the pedal ring is changed.

Fig. 9 is a structural diagram of a prior art.

Please refer to FIG. 1, the foot ring 3 referred to in the present invention is installed on the pillar 101 that supports the chair 100 to stand, and the occupant who provides the chair 100 can step on the foot ring 3 to rest. The locking mechanism A, as shown in FIG. 2, is used to fix the foot ring 3 on the pillar 101.

As shown in Figures 3 to 5, the locking mechanism A mainly includes a hollow inner sleeve 1, a quick release device 4, and a hollow outer sleeve 2, the inner sleeve 1 is used to sleeve the chair 100 The pillar 101 has a tapered surface 10 on the outside with threads 12 distributed, and a slit 11 penetrating the longitudinal direction, so that the inner sleeve 1 has a C-shaped cross section and can be compressed and deformed. At the bottom end of the inner sleeve 1, there are two convex buckling portions 13 distributed on both sides of the gap 11. Each buckling portion 13 has a through hole 131 and corresponds to each other. Due to the gap 11, When the two buckling parts 13 are forced to close together, the inner sleeve 1 is deformed to generate a clamping force.

The quick release device 4 has a through hole 41 corresponding to the two through holes 131 at its end. A bolt 5 is inserted between the through hole 41 and the two through holes 131, and the end of the bolt 5 is connected to an anti-falling screw. The cap 6 is connected by rotation to connect the quick release device 4 to the inner sleeve 1; the torsion force generated by the rotation of the quick release device 4 acts on the fastening portion 13, so that the gap 11 is reduced and the inner sleeve 1 It is fixed to the pillar 101 of the chair 100. Preferably, there is a cushion 14 between the two buckling portions 13, and the cushion 14 has a corresponding hole 141 corresponding to the through hole 131 for the bolt 5 to pass through. The function of the cushion 14 is to avoid two buckles. The joint 13 is damaged by collision when it is clamped by force.

The tapered surface 10 of the inner sleeve 1 has a continuous hole 15 so that a deformable clip 16 is formed on the tapered surface 10; preferably, there is a fixing hole 161 on the clip 16 through The fixing hole 161 is provided with a clamping pad 17 on the inner surface of the clamping piece 16. The surface of the clamping pad 17 is provided with friction patterns 171 and faces the hollow of the inner sleeve 1. In addition, the clamping pad 17 is disposed There is a pair of engaging parts 172 corresponding to the fixing holes 161, and the clamping pad 17 is made of plastic material, by which the engaging parts 172 can be clamped on the fixing holes 161 in a pressing and pressing manner.

The outer sleeve 2 is used to connect the pedal ring 3, and has a tapered surface 21 matching the inner sleeve 1 inside. The surface of the tapered surface 21 is distributed with threads 22 corresponding to the threads 12 of the inner sleeve 1. It is joined to the inner sleeve 1 through rotation. When the outer sleeve 2 is engaged with the inner sleeve 1 in a rotating manner, the corresponding tapered surface design can be used to make the gap 11 of the inner sleeve 1 smaller, and generate radial effects on the pillar 101 of the chair 100. The pressing force of, the inner sleeve 1 can be more closely attached to the pillar 101 to be fixed, and the outer sleeve 2 can also be fixed on the inner sleeve 1 more tightly. What's more, since the clip 16 on the inner sleeve 1 is also deformed toward the pillar 101 due to external forces and forms a clamping force on the pillar 101, the inner sleeve 1 can be more stably fixed to the On the pillar 101 of the chair 100; in addition, the clip pad 17 can avoid wear when the clip 16 contacts the pillar 101, and the clip pad 17 is replaceable, thereby extending the service life of the inner sleeve 1.

In addition, as shown in Figures 2 and 3, the foot ring 3 has a ring-shaped body part 31 made of metal material. The body part 31 is provided with a non-slip pad 33. In addition, the body part 31 and the outer sleeve A plurality of support rods 32 are connected between 2 and the body portion 31 is provided with a positioning groove 311 at a position corresponding to each support rod 32; and the outer surface of the outer sleeve 2 is provided with a position corresponding to each support rod 32. There is a through groove 23. The two ends of each support rod 32 penetrate into the through groove 23 and the positioning groove 311 to be fixed, so that the pedal ring 3 can be connected with the outer sleeve 2, and each support rod 32 can be randomly Is replaced.

When assembling and operating, please refer to Figure 6~Figure 8. First, the outer sleeve 2 and the inner sleeve 1 are respectively sleeved on the pillar 101 of the chair 100. After the set height is selected, the fastening portion 13 is pressed by the rotating torque of the quick release device 4 to reduce the gap 11, and the inner sleeve As a result, the barrel 1 is deformed to generate a clamping force on the pillar 101 to obtain a fixation; continue, the outer sleeve 2 is connected to the inner sleeve 1 with the thread 22 on the tapered surface 21 corresponding to and rotationally joined, and the rotating torque makes the gap 11 smaller This produces a stronger clamping, and the clip 16 on the inner sleeve 1 is also deformed toward the pillar 101 due to external forces and forms a clamping force on the pillar 101, making the inner sleeve 1 more stable The ground is fixed to the pillar 101 of the chair 100. After fixing the positions of the outer sleeve 2 and the inner sleeve 1, insert the support rod 32 into the through groove 23 and the positioning groove 311 respectively, and the foot ring 3 can be connected for use by the occupant, as shown in Figure 6 .

To change the height position of the pedal ring 3 relative to the pillar 101, as shown in Figure 7, the body 31 of the pedal ring 3 is forced to drive the outer sleeve 2 to rotate, as shown in the figure in the counterclockwise direction. The engagement relationship between the outer sleeve 2 and the inner sleeve 1 is loose but not completely separated, and the pressing of the snap-fit portion 13 by the quick release device 4 is released, so that the gap between the gaps 11 becomes larger and the inner sleeve 1 is adjustable. , And then move to the set height together with the pedal ring 3, repeat the aforementioned actions, tighten the quick release device 4, turn the pedal ring 3 to fully engage and fasten the outside of the inner sleeve 1 , As shown in Figure 8.

A‧‧‧Locking mechanism

1‧‧‧Inner sleeve

11‧‧‧Gap

12‧‧‧Thread

13‧‧‧Fastening part

131‧‧‧through hole

14‧‧‧Cushion pad

15‧‧‧Break hole

16‧‧‧Clip

2‧‧‧Outer sleeve

21‧‧‧Cone

22‧‧‧Thread

23‧‧‧Through the slot

32‧‧‧Support Rod

4‧‧‧Quick release

Claims (6)

A pedal ring locking mechanism, comprising: a hollow inner sleeve with a tapered surface with threads distributed on the outside, the tapered surface having a deformable clip formed by a continuous hole, and a It penetrates the longitudinal direction and provides a gap for deformation of the inner sleeve, wherein a clamping pad is installed on the inner side of the clip, and the surface of the clamping pad is provided with friction lines and faces the hollow of the inner sleeve; a quick release device , Is connected to the bottom end of the inner sleeve to control the size of the gap; a hollow outer sleeve is used to connect the pedal ring, and the inside has a cone surface that matches the inner sleeve, and is distributed with corresponding threads. It is joined to the outside of the inner sleeve. The pedal ring locking mechanism according to claim 1, wherein the bottom end of the inner sleeve has two outwardly convex buckling parts distributed on both sides of the gap, and each buckling part has A through hole corresponds to each other; the end of the quick release device has a through hole corresponding to the through hole, and a bolt is inserted between the through hole and the through hole to connect the quick release device to the inner sleeve. The pedal ring locking mechanism according to claim 2, wherein a cushion pad is provided between the two buckling parts, and the cushion pad has a corresponding hole corresponding to the through hole for bolts to pass through. The pedal ring locking mechanism according to claim 1, wherein the clip has a fixing hole, and the clamping pad is provided with a locking portion corresponding to the fixing hole, and the locking portion is locked in the fixing hole on. The pedal ring locking mechanism according to claim 1, 2 or 3, wherein a plurality of support rods are connected between the outer sleeve and the pedal ring, and the outer sleeve corresponding to each support rod position is provided There are slots to provide positioning. The pedal ring locking mechanism according to claim 5, wherein the pedal ring defines a positioning groove corresponding to each support rod to provide connection.

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