CN205041037U - Revolving chair stock - Google Patents

Abstract

The utility model discloses a swivel chair tray, which comprises a base and a bracket. The bracket is connected to the base through a rotating shaft, and also includes a swing piece and a horizontally arranged adjusting screw. One end of the adjusting screw is inserted into the base, and the other end of the adjusting screw is exposed. Outside the base, the part of the adjusting screw exposed outside the base is covered with a spring, and the threaded section of the adjusting screw exposed outside the base is threaded with a nut for adjusting the degree of deformation of the spring; the swinging part is placed in the base and the swinging part The middle part of the oscillating member is hinged to the base, and one end of the swinging member is hinged to the end of the adjusting screw inserted into the base. The bracket has a driving frame extending into the base. When the bracket rotates, the other end of the oscillating member is pushed or pulled by the driving frame to make the swing The component rotates, and then drives the adjustment screw to move to cause the spring to deform to form the restoring force of the bracket. Because the springs of the utility model are installed horizontally, the shape of the tray is more regular, which can reduce space waste and increase the packing capacity during packing and transportation.

Description

swivel chair tray

technical field

The utility model relates to the technical field of swivel chairs and office chairs, in particular to a swivel chair tray.

Background technique

The swivel chair tray, also known as the swivel chair chassis, is an important part installed under the seat cushion of the swivel chair. The lifting of the seat cushion and the adjustment of the tilt angle of the backrest are all done by the tray.

For example, Chinese patent (notification number: CN2922618) discloses a kind of: "lifting and tilting chair chassis", this chair tray is made up of upper plate, middle plate and knob, and knob is fixed on the upper plate by carriage screw, dust-proof The cover, washer and spring are installed on the middle plate; when the chair is tilted, the spring has a reset effect on the tilt of the chair. It can be seen from this patent that the knobs, springs and carriage screws are basically installed vertically or nearly vertically On the tray, that is, the angle formed by the axis of the knob, spring and carriage screw and the middle plate or seat is 70 to 90 degrees. If you want to adjust the spring force to adjust the reset force of the spring on the chair tilt, It is necessary to squat down or lean over and turn the knob to adjust the up and down position of the knob on the carriage screw, thereby adjusting the compression degree of the spring to adjust the reset force of the spring on the tilt of the chair, which is inconvenient and laborious to operate, especially for women It is unsightly to lean over to adjust the posture. In many cases, the above-mentioned defects directly cause the user not to adjust the knob, which directly leads to the waste of the above-mentioned functions.

The Chinese patent with the notification number "CN102090805" has been improved and provides a seat chassis with adjustable reclining force, which includes a middle plate and a large plate. A knob is arranged under the front part of the middle plate, and the knob has a cavity. A mounting plate fixed with the knob is arranged in the cavity of the knob, and a worm wheel is arranged at a position corresponding to the bottom of the mounting plate on the knob, and the worm wheel can rotate around its own axis. It rotates relative to the knob; the main points of its utility model are: inside the knob, there is a worm meshing with the worm wheel corresponding to the side of the worm wheel, one end of the handle extends from the knob into the knob and is connected with the worm transmission, and the adjusting bolts pass through from top to bottom in sequence The large plate, the middle plate and the mounting plate in the knob are then threaded to match the worm wheel, the adjusting bolt is coaxial with the worm wheel, and the adjusting bolt corresponds to the position below the center plate and above the mounting plate and is sleeved with a coil spring.

With such an improvement, there is no need to lean over, and you only need to reach out and turn the handle to move up or down through the worm gear adjusting bolt, thereby adjusting the compression degree of the coil spring. Similarly, the utility model patent with the announcement number: "CN201602417" and the utility model name: "Worm gear adjustable swivel chair tray" also has similar improvements. The adjustment handwheel is on the side of the seat, and the user can adjust it without squatting or leaning over. .

But above-mentioned patent has a common shortcoming and is: knob, spring and adjusting bolt are installed on the tray vertically or nearly vertically basically, that is to say the clamp formed by the axis of knob, spring and adjusting bolt and tray or seat The angle is 70-90 degrees, so from the front or both sides of the chair, you can clearly see the knobs exposed under the tray, which is very unsightly, and to a certain extent also reduces the grade of the product, and can no longer adapt to people's increasingly Increased requirements for a simple appearance of the chair; furthermore, such a structural form is irregular in shape, which is not conducive to increasing the packing capacity, and the raised knob leads to a direct thickening of the packing box, but in fact, there are many places inside the box that are empty , which wastes the space inside the box and increases the shipping cost.

Utility model content

The utility model overcomes the disadvantages of the above-mentioned prior art, and provides a swivel chair tray which can not only make the whole swivel chair simple and beautiful, but also conveniently adjust the spring compression degree and increase the packing capacity.

The technical scheme of the utility model is achieved in that:

A swivel chair tray, including a base used to connect the air rod, a bracket used to connect the seat, the bracket is connected to the base through a horizontally arranged rotating shaft, and also includes a swing piece and a horizontally arranged adjusting screw, one end of the adjusting screw Insert into the base, the other end of the adjusting screw is exposed outside the base, the part of the adjusting screw exposed outside the base is covered with a spring, and the threaded section of the adjusting screw exposed outside the base is threaded with a nut for adjusting the initial deformation degree of the spring; The swinging piece is laid flat in the base and the middle part of the swinging piece is hinged to the base. One end of the swinging piece is hinged to the end of the adjusting screw inserted into the base. The bracket has a drive rack extending into the base. The other end is pushed or pulled by the driving frame to make the swinging member rotate, and then drive the adjustment screw to move to cause the spring to deform to form the restoring force of the bracket.

Preferably, the central axis of rotation of the oscillating member is perpendicular to the horizontal plane, and the rotating direction of the oscillating member is the horizontal direction. The horizontal setting of the swing parts can not only simplify the driving structure inside the base, reduce the driving related parts, but also make it possible to further reduce the overall height of the base, making the tray lighter and smaller. From the perspective of use effect, the tray can be The whole is almost hidden under the seat of the swivel chair, which improves the aesthetics and grade of the swivel chair.

Preferably, a bracket is fixed inside the base, and the swing member and the bracket are hinged through a first pin shaft, and the first pin shaft is arranged perpendicular to the horizontal plane. The bracket can be connected with the base by welding.

As a preference, the bracket includes a pair of support plates arranged in parallel at intervals, one end of the support plate is fixedly connected with the side plate of the base, the support plate is correspondingly provided with a shaft hole matched with the first pin shaft, and the swing member is arranged on the two support plates. between the boards. The oscillating member is arranged between the two support plates and does not directly contact the base, which helps to reduce friction and make the rotation more smooth.

Preferably, the bracket includes a support plate arranged horizontally, one end of the support plate is fixedly connected to the side plate of the base, and a shaft hole matched with the first pin shaft is correspondingly opened on the support plate and the bottom plate of the base, and the swing member is provided Between the support plate and the bottom plate of the base. The support plate cooperates with the bottom plate of the base as the shaft seat of the first pin shaft, which helps to reduce parts and simplify the structure.

Preferably, the swinging member is L-shaped as a whole.

Preferably, the oscillating member includes two parallel and symmetrical L-shaped plates, the two L-shaped plates are fixedly connected by at least one connecting plate, the middle part of the L-shaped plate is hinged to the base, and one arm of the L-shaped plate is connected to the adjustment The screw rod is hinged, and the other arm of the L-shaped plate cooperates with the drive frame.

As a preference, a second pin shaft is provided between the other arms of the two L-shaped plates, and a force bearing block is rotatably sleeved on the second pin shaft, and the force bearing block has a function that is always in contact with the corresponding part of the drive frame. of the force surface. When the swinging member swings, the moving track of the second pin shaft is arc-shaped, and the force-bearing block is directly in contact with the driving frame and is pushed by the driving frame, and the force-bearing surface is preferably a plane, so when the swinging member swings, the force-bearing block itself It also rotates thereupon to keep against the drive frame all the time, so that the force of the drive frame can be completely transmitted to the swing member without loss of force.

In order to cooperate with the swinging member conveniently, preferably, a third pin shaft for pushing the swinging member is provided at the lower end of the driving frame, and the left and right ends of the third pin shaft are rotatably connected with the driving frame. The setting of the third pin shaft changes the contact form into line contact, which reduces the friction force during contact.

Preferably, a shaft sleeve is provided on the third pin shaft for rotation sleeve. The bushing is rotatable, so when it cooperates with the driving frame, especially the force-bearing block, the rolling friction force generated by the bushing is smaller than the sliding friction force generated by the line contact, which can make the third pin shaft and the driving frame The cooperation between them is smoother.

In order to enhance the firmness of the oscillating member, prevent deformation, and reduce the volume of the oscillating member, preferably, the oscillating member has a triangular shape as a whole.

Preferably, the swing member includes two parallel and symmetrical triangular plates, the plane of the triangular plates is parallel to the plane of the bottom plate of the base, and the two triangular plates are fixedly connected by at least one connecting plate. One corner is respectively hinged with the base and the adjusting screw, and the other corner of the triangular plate is matched with the driving frame.

As a preference, a second pin shaft is provided between the two corners of the two triangular plates that cooperate with the drive frame, and a force-bearing block is rotatably set on the second pin shaft, and the force-bearing block has a position corresponding to the drive frame. Forced surfaces that are always in contact. In the same way, when the swinging member swings, the movement track of the second pin shaft is arc-shaped, and the force-bearing block is directly in contact with the driving frame and is pushed by the driving frame, and the force-bearing surface is preferably a plane, so when the swinging member swings, it is affected The force block itself also rotates thereupon to keep against the driving frame all the time, so that the force of the driving frame can be completely transmitted to the swinging member without force loss.

Preferably, a third pin shaft for pushing the force receiving block is provided at the lower end of the drive frame, and the left and right ends of the third pin shaft are rotatably connected with the drive frame. The setting of the third pin shaft changes the contact form into line contact, which reduces the friction force during contact.

Preferably, a shaft sleeve is provided on the third pin shaft for rotation sleeve. The bushing is rotatable, so when it cooperates with the driving frame, especially the force-bearing block, the rolling friction force generated by the bushing is smaller than the sliding friction force generated by the line contact, which can make the third pin shaft and the driving frame The cooperation between them is smoother.

As a preference, the end of the pendulum that cooperates with the drive frame is provided with a fourth pin shaft, and a bracket is provided in the base, one end of the bracket is hinged to the lower end of the drive frame, and the other end of the bracket is provided with a fifth pin. shaft, the fourth pin shaft and the fifth pin shaft are intersected and both are hooked together. When the bracket rotates, the driving frame pulls the bracket, and then pulls the swinging member to make it rotate. Because the installation positions of the components are different, this arrangement can pull the carriage to move through the driving frame when the carriage rotates, and then the carriage can drive the swinging member to rotate.

As a preference, a shaft sleeve is provided on the fifth pin shaft, and a force bearing block is provided on the fourth pin shaft. The force bearing block has a force bearing surface that is always in contact with the corresponding part of the drive frame. The shaft sleeve is in contact with the force bearing surface. In the same way, when the swinging member swings, the moving track of the fourth pin shaft is arc-shaped, and the force-bearing block is directly in contact with and pushed by the bracket, and the force-bearing surface is preferably a plane, so when the swinging member swings, it is The force block itself also rotates accordingly to keep against the carriage, so that the force of the carriage can be completely transmitted to the swinging member without force loss; at the same time, the shaft sleeve can rotate, so when it is matched with the force , the rolling friction force generated by the shaft sleeve is smaller than the sliding friction force generated by the line contact, which can make the cooperation between the fourth pin shaft and the driving frame smoother.

Preferably, a spring bracket is respectively provided at both ends of the spring, and the two ends of the spring respectively abut against the nut and the side plate of the base through the adjacent spring brackets.

Preferably, it also includes an adjustment handle, the adjustment handle is connected with a sleeve, the sleeve is sleeved outside the spring, and the nut is fixedly arranged at the bottom of the sleeve. The axes of the adjustment handle and the sleeve are on the same line as the axes of the adjustment screw and the spring. The adjustment handle is on the side of the chair and can be touched by hand, which facilitates the adjustment of the compression degree of the nut and spring. The sleeve wraps the spring to prevent its exposed.

Preferably, the sleeve has an extension section, and the adjustment handle and the extension section are sleeved together in a manner of fixing in the circumferential direction and moving in the axial direction. When the adjustment nut is not needed, the adjustment handle can be slid to the innermost, so that the adjustment handle is completely hidden under the seat, and when the adjustment nut is needed, the adjustment handle can be pulled out for adjustment.

Preferably, a sliding slot is provided on the side wall of the extension section along the axial direction, and a sliding block is correspondingly provided on the hollow inner wall of the adjusting handle, and the sliding block is locked in the sliding slot.

Preferably, the base includes a bottom plate and side plates vertically arranged on both sides of the bottom plate, and one of the side plates is provided with a through hole for the adjustment screw to pass through.

Preferably, the upper end of the driving frame is welded and fixed to the bracket, and the lower end of the driving frame extends into the base.

As a preference, an air rod socket for inserting the air rod is provided at the center of the base, the swinging member is arranged around the air rod socket, bounded by the center of the base, the hinge of the swinging member and the base and the spring are respectively located at The left and right sides of the center of the base, while the adjusting screw and the driving frame are respectively located at the front and rear sides of the center of the base. Such a structural design makes full use of the existing space without affecting the drive structure of the present invention, making the structure more compact, reducing the volume, and making the tray more miniaturized.

The design starting point, concept and beneficial effects of the utility model that have adopted the above-mentioned technical scheme are:

The swivel chair tray of the utility model changes the spring from the vertical installation to the horizontal installation, and the force transmission of the bracket rotation and the adjustment screw is completed through the swing piece in the base, which is very ingenious. The advantage of the horizontal installation is that the axis of the spring and the The axis of the adjustment handle is basically on a line, not only does not need to lean over and squat down, which makes the adjustment more convenient, but also after it is installed on the seat, the relatively wide seat will cover the spring and most parts of the adjustment handle. Look, only one end of the adjustment handle is exposed, and the overall appearance of the chair is simple and elegant, which not only satisfies the function of convenient adjustment, but also improves the product grade.

Simultaneously, since the springs of the utility model are installed horizontally, the shape of the tray is more regular, which can effectively reduce waste of space during packing and transportation, increase packing volume, and reduce transportation costs.

Furthermore, the swinging part is placed in the base, which not only simplifies the driving structure inside the base, reduces the number of drive-related components, but also further reduces the overall height of the base, making the tray more lightweight and miniaturized. In terms of the use effect, the entire tray can be almost hidden under the seat of the swivel chair, which improves the aesthetics and grade of the swivel chair.

At the same time, the oscillating part is placed in the base in a horizontal position. This setting makes the installation of the adjusting screw and spring more flexible, and can be installed at the front or rear of the pedestal according to actual needs. Correspondingly, only the position of the oscillating part needs to be changed The installation direction is fine.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of tray in embodiment 1;

Fig. 2 is the internal structure schematic diagram of tray in embodiment 1;

Fig. 3 is a schematic diagram of the internal structure of another angle of the pallet in embodiment 1;

Fig. 4 is the top view structural representation of tray in embodiment 1;

Fig. 5 is a schematic plan view showing the cooperation of the drive frame and the swing member in Embodiment 1;

Fig. 6 is a schematic diagram of the hinged cooperation between the swing member and the adjusting screw in Embodiment 1;

7 is a schematic diagram of the disassembled structure of the bracket, the swing member and the base in Embodiment 1;

Fig. 8 is a schematic diagram of a disassembled structure at another angle of the bracket, the swinging member and the base in Embodiment 1;

Figure 9 is an exploded view of the tray in Example 1;

10 is a schematic diagram of the internal three-dimensional state of the base when the bracket is rotated 9 degrees in Embodiment 1;

Fig. 11 is a schematic diagram of the plane state of the base when the bracket is rotated 9 degrees in Embodiment 1;

12 is a schematic diagram of the internal three-dimensional state of the base when the bracket is rotated 19 degrees in Embodiment 1;

Fig. 13 is a schematic diagram of the plane state of the base when the bracket rotates 19 degrees in embodiment 1;

Figure 14 is a schematic diagram of the three-dimensional structure of the tray in Example 2;

Fig. 15 is a schematic diagram of the planar structure of the tray in Example 2;

16 is a schematic diagram of the internal three-dimensional state of the base when the bracket is rotated 9 degrees in Embodiment 2;

Fig. 17 is a schematic diagram of the plane state of the base when the bracket is rotated 9 degrees in Embodiment 2;

Figure 18 is a schematic diagram of the internal three-dimensional state of the base when the bracket rotates 19 degrees in Embodiment 2;

Fig. 19 is a schematic diagram of the plane state of the base when the bracket rotates 19 degrees in embodiment 2;

Figure 20 is a schematic diagram of the internal structure of the tray in Example 3;

Fig. 21 is a schematic diagram of the internal structure of the pallet in another angle in Example 3;

Figure 22 is a schematic diagram of the internal plane structure of the tray in Example 3;

Figure 23 is an exploded view of the tray in Example 3;

Fig. 24 is a schematic diagram of the hinged cooperation between the swing member and the adjusting screw in Embodiment 3;

Fig. 25 is a schematic diagram of the internal three-dimensional state of the base when the bracket is rotated 9 degrees in embodiment 3;

Fig. 26 is a schematic diagram of the plane state of the base when the bracket is rotated 9 degrees in embodiment 3;

Fig. 27 is a schematic diagram of the internal three-dimensional state of the base when the bracket rotates 19 degrees in embodiment 3;

Fig. 28 is a schematic diagram of the plane state of the base when the bracket rotates 19 degrees in embodiment 3;

Figure 29 is a schematic diagram of the internal plane structure of the tray in Example 4;

Fig. 30 is a schematic diagram of the internal three-dimensional structure of the tray in Embodiment 4.

detailed description

The specific embodiment of the utility model is as follows:

First, define the reference orientation of the main components of the utility model. In the utility model, when the tray and the swivel chair are installed and used normally, the front of the swivel chair is the front end, and the rear of the swivel chair including the position of the backrest is the rear end, and the front end of the tray is far away from the backrest. area, the rear end of the tray is the area near the backrest.

Embodiment 1: This embodiment provides a swivel chair tray. As shown in Figures 1 to 13, a swivel chair tray includes a base 1 for connecting the air rod, a bracket 2 for connecting the seat, and the bracket 2 The tray is connected to the base 1 through a horizontal rotating shaft 3. The tray also includes a swinging member 4 and a horizontally fixed and circumferentially fixed adjusting screw 5. One end of the adjusting screw 5 is inserted into the base 1, and the other end of the adjusting screw 5 is exposed to the base. 1 outside. The part of the adjusting screw 5 exposed outside the base 1 is provided with a spring 26, and the threaded section 27 of the adjusting screw 5 exposed outside the base 1 is threaded with a nut 28 for adjusting the initial compression degree of the spring 26; the degree of deformation of the spring mainly refers to The degree of compression of the spring, the compression of the spring produces elastic force, the degree of compression of the spring is different, and the corresponding elastic force is also different; the adjustment screw 5 does not necessarily mean that the entire section of the screw 5 is threaded from the beginning to the end, it can be only in the nut 28 The mating part is provided with threads.

The pendulum 4 is laid flat in the base 1 and the middle part of the pendulum 4 is hinged with the base 1. One end of the pendulum 4 is hinged with the end of the adjusting screw 5 inserted into the base 1. There is a bottom surface of the bracket 2 extending into the base 1. When the bracket 2 rotates, the other end of the swinging member 4 is pushed or pulled by the driving rack 6 so that the swinging member 4 rotates, and then the adjusting screw 5 is driven to move and the spring 26 is deformed to form the restoring force of the bracket 2. The central axis of the swing member 4 rotation is perpendicular to the horizontal plane, and the rotation direction of the swing member 4 is the horizontal direction. Since the end of the adjusting screw 5 inserted into the base 1 is restricted by the swing member 4, it cannot rotate in the circumferential direction.

Specifically, the base 1 includes a bottom plate 7 and side plates 8a, 8b vertically arranged on both sides of the bottom plate 7, wherein the side plate 8a is provided with a perforation 9 for the adjustment screw 5 to penetrate, and the upper end of the drive frame 6 It is welded and fixed with the bottom surface of the bracket 2, and the lower end of the drive frame 6 extends into the base 1. Specifically, the drive frame 6 includes a base plate 34 and drive plates 35 extending downward along two sides of the base plate 34 . To improve firmness and strength, the two drive plates 35 are connected by at least one reinforcing plate 36 .

As shown in FIGS. 7-9 , a spring bracket 29 is provided at both ends of the spring 26 , and the two ends of the spring 26 respectively contact the nut 28 and the side plate 8a of the base through the adjacent spring brackets 29 . The swivel chair tray of the present invention also includes an adjustment handle 30, which is connected with a sleeve 31, the sleeve 31 is sleeved outside the spring 26, and the nut 28 is fixedly arranged at the bottom of the sleeve 31. Furthermore, the sleeve 31 has an extension section 32, and the adjustment handle 30 and the extension section 32 are sleeved together in a manner of fixing in the circumferential direction and moving in the axial direction; A chute 33 is provided along the axial direction, and a slider (not shown) is correspondingly provided on the hollow inner wall of the adjusting handle 30 , and the slider is stuck in the chute 33 .

As shown in Figures 4, 7 and 8, a bracket 10 is fixed inside the base 1, and the swing member 4 and the bracket 10 are hinged through the first pin shaft 11; specifically, the bracket 10 includes a horizontally arranged support Plate 12, one end of the support plate 12 is fixedly connected to the side plate 8a of the base 1, and the support plate 12 and the bottom plate 7 of the base 1 are correspondingly provided with a shaft hole 13 that cooperates with the first pin shaft 11, and the swing member 4 is arranged on the support plate. 12 and the bottom plate 7 of the base 1. This structural form can minimize parts and optimize the internal structure of the base.

As another implementation, the bracket 10 may also include a pair of support plates 12 arranged in parallel at intervals, the support plates 12 are perpendicular to the side plate 8a, and the support plates 12 are correspondingly provided with a shaft that cooperates with the first pin shaft 11 hole 13 , the swing member 4 is arranged between the two support plates 12 and is hinged to the two support plates 12 through the first pin shaft 11 .

As shown in Figure 5, the air rod socket 37 for inserting the air rod is located in the middle of the width direction of the base 1. The spring 26 is on the same side of the middle of the base 1, and the spring 26 is at the front end or the rear end of the base. Of course, it can also be arranged on both sides of the middle of the base 1 as required. When the bracket 2 rotates backward, the driving frame 6 pushes the swing member 4 to rotate and thereby compresses the spring.

As shown in Figures 4, 6, and 9, the swinging member 4 is L-shaped as a whole, and the swinging member 4 includes two L-shaped plates 14 arranged symmetrically in parallel, and at least one Connecting plate 15 is fixedly connected, and the middle part of L-shaped plate 14 is hinged with support plate 12, and one arm of L-shaped plate 14 is hinged with adjusting screw rod 5, and the other arm of L-shaped plate 14 cooperates with driving frame 6. Specifically, a second pin shaft 16 is provided between the other arms of the two L-shaped plates 14, and a force-bearing block 17 is rotatably sleeved on the second pin shaft 16, and the force-bearing block 17 has the function of driving The force bearing surface 18 where the corresponding parts of the frame 6 are always in contact with each other, the force bearing surface 18 is a plane. And cooperate with force bearing block 17, be provided with the 3rd pin shaft 19 that is used to promote force bearing block 17 in drive frame 6 lower end, the left and right ends of the 3rd pin shaft 19 are rotationally connected with drive plate 35 of drive frame 6 , in order to further reduce friction, the third pin shaft 19 is rotatably provided with a bushing 20 , and the bushing 20 is in contact with the force-bearing surface 18 .

After the tray of the utility model is installed on the swivel chair, when the adjustment handle is turned, the nut 28 can be driven to rotate synchronously, because the adjustment screw rod 5 is fixed in the circumferential direction, and the adjustment screw rod 5 is limited by the swing member 4 and the gravity of the bracket and the seat , so that the initial state of the adjusting screw 5 will not move, and at this moment the nut 28 moves horizontally along the axis of the adjusting screw 5, which will adjust the initial compression degree of the spring, and then realize the purpose of adjusting the tilting force of the spring on the chair. When a person sits on the swivel chair and leans back, the bracket 2 rotates so that the drive frame 6 pushes the swing member 4 to rotate, and then pulls the adjusting screw 5 to move toward the direction of the compression spring 26, so that the spring 26 generates elastic force so as to reset the bracket 2 .

When operating, the user does not need to lean over or squat on the ground, just stretch the hand to the side of the chair to touch the adjustment handle and turn it. The operation is very convenient, saving time and effort; The installation method is changed to horizontal installation, so that the seat covers most of the spring and the handle, which makes the overall appearance of the chair more concise and improves the product grade.

Embodiment 2: The principle of this embodiment is the same as that of Embodiment 1, the only difference is: as shown in Figures 14-19, in order to make the rotation more free and reduce the size of parts as much as possible, while taking into account the requirements of firmness The oscillating member 4 has a triangular shape as a whole, and the oscillating member 4 includes two parallel and symmetrical triangular plates 21. The plane of the triangular plates 21 is parallel to the plane of the bottom plate 7 of the base 1. The two corners of the triangular plate 21 are respectively hinged with the base 1 and the adjusting screw 5 through at least one connecting plate 15 , and the other corner of the triangular plate 21 is matched with the driving frame 6 .

Specifically, a second pin shaft 16 is arranged between the two angles of the two triangular plates 21 that cooperate with the drive frame 6, and a force bearing block 17 is provided with a rotation sleeve on the second pin shaft 16, and the force bearing block 17 17 has a force-bearing surface 18 that is always in contact with the corresponding part of the drive frame 6; correspondingly, the drive frame 6 lower end is pierced with a third pin 19 for pushing the force-bearing block 17, and the left and right sides of the third pin 19 The end is rotatably connected with the drive frame 6, and in order to further reduce friction, a shaft sleeve 20 is rotatably sleeved on the third pin shaft 19, and the shaft sleeve 20 is in contact with the force-bearing surface 18.

Furthermore, different from Embodiment 1, as shown in Figures 14 and 15, the swinging member 4 is installed in reverse, that is, the spring 26 is on the left side of the base 1 and at the front end of the base 1, and the swinging member 4 and the front end of the base 1 The hinge of the bracket 10 is on the right side of the base 1, and when the bracket 2 rotates backward, the drive frame 6 pushes the swing member 4 to rotate and then compresses the spring.

Embodiment 3: The principle of this embodiment is the same as that of the above embodiment, the difference is that the driving frame drives the swing member to rotate by pulling.

Specifically, as shown in Figures 20 to 28, the end of the swing member 4 that cooperates with the driving frame 6 is pierced with a fourth pin shaft 22. Since the rotation direction of the bracket 2 is set so that the driving frame 6 swings away from The direction of part 4 moves, is provided with carriage 23 in base 1, and carriage 23 is made up of two parallel carriages 24 at intervals and at least one connecting plate 15 connecting two carriages 24, and one end of carriage 23 is connected with driving frame 6. The lower end is hinged. The other end of the carriage 23 is pierced with a fifth pin shaft 25. The fourth pin shaft 22 and the fifth pin shaft 25 are intersected and connected together. When the bracket 2 rotates, the driving frame 6 is pulled Drag frame 23, and then pull swing member 4 to make it rotate.

Furthermore, the fifth pin shaft 25 is rotatably provided with a shaft sleeve 20 , and the fourth pin shaft 22 is rotatably provided with a force-bearing block 17 , and the force-bearing block 17 is always in contact with the shaft sleeve 20 . The bearing surface 18, the bushing 20 is in contact with the bearing surface 18.

Embodiment 4: The principle of this embodiment is the same as that of the above-mentioned embodiment 1. The swing member 4 is L-shaped as a whole. The difference is that, as shown in FIGS. 37 is at the center of the base 1, and the L-shaped swinging member 4 is arranged around the air rod insertion hole 37. In this embodiment, the center of the base 1, that is, the air rod insertion hole 37, is the boundary, and the support 10 and the spring (not shown) are respectively on the left and right sides of the air rod jack 37, the spring is at the front end or the rear end of the base, and the adjusting screw 5 and the drive frame 6 are respectively located on the front and rear sides of the air rod jack 37, so that The structural design makes it possible to make full use of the existing space without affecting the driving structure of the utility model, making the structure more compact, reducing the volume, and making the tray more miniaturized.

Claims (24)

1. a Revolving chair tray, comprise connecting the base of gas bar, in order to connect the bracket of seat support, bracket is connected with base by horizontally disposed rotating shaft, it is characterized in that: also comprise a swing component and horizontally disposed adjusting screw(rod), in one end inserted base of adjusting screw(rod), the other end of adjusting screw(rod) is exposed to outside base, the part that adjusting screw(rod) is exposed to outside base is arranged with spring, and on adjusting screw(rod) is exposed to outside base thread segment, threaded engagement has the nut in order to regulating spring initial deformation degree; Swing component lie low be arranged in base and the middle part of swing component and base hinged, one end of swing component and this end of adjusting screw(rod) inserted base hinged, bracket extends to the bogie in base with one, during carriage turns, the other end of swing component promotes by bogie or pulls swing component is rotated, and then drives adjusting screw(rod) to move and impel camber of spring to form the restoring force of bracket.

2. Revolving chair tray according to claim 1, is characterized in that: the central axis that swing component rotates is in horizontal plane, and the rotation direction of swing component is horizontal direction.

3. Revolving chair tray according to claim 1, is characterized in that: be provided with support at base internal fixtion, and swing component and support are by the first hinge, and the first described bearing pin is arranged perpendicular to horizontal plane.

4. Revolving chair tray according to claim 3, it is characterized in that: described support comprises the gripper shoe of a pair spaced and parallel setting, the side plate of gripper shoe one end and base is fixedly linked, and in gripper shoe, correspondence offers the axis hole coordinated with the first bearing pin, and swing component is arranged between two gripper shoes.

5. Revolving chair tray according to claim 3, it is characterized in that: described support comprises a horizontally disposed gripper shoe, the side plate of gripper shoe one end and base is fixedly linked, correspondingly on the base plate of gripper shoe with base offer the axis hole coordinated with the first bearing pin, swing component is arranged between gripper shoe and the base plate of base.

6. Revolving chair tray according to claim 1, is characterized in that: described swing component entirety is L-shaped.

7. Revolving chair tray according to claim 6, it is characterized in that: described swing component comprises the L shaped plate that two Parallel Symmetrics are arranged, be fixedly linked by least one connecting plate between two L shaped plates, hinged with base in the middle part of L shaped plate, one arm of L shaped plate and adjusting screw(rod) hinged, another arm of L shaped plate matches with bogie.

8. Revolving chair tray according to claim 7, is characterized in that: be provided with the second bearing pin between another arm of two L shaped plates, on the second bearing pin, turning set is provided with force block, and described force block has the stress surface contacted all the time with bogie corresponding site.

9. Revolving chair tray according to claim 1, is characterized in that: be provided with the 3rd bearing pin for promoting swing component in bogie lower end, two ends, left and right and the bogie of the 3rd bearing pin are rotationally connected.

10. Revolving chair tray according to claim 9, is characterized in that: on the 3rd bearing pin, turning set is provided with axle sleeve.

11. Revolving chair trays according to claim 1, is characterized in that: swing component entirety is triangular in shape.

12. Revolving chair trays according to claim 11, it is characterized in that: described swing component comprises the set square that two Parallel Symmetrics are arranged, plane residing for the base plate of plane residing for described set square and base is parallel, be fixedly linked by least one connecting plate between two set squares, two angles of set square respectively with base and adjusting screw(rod) hinged, match with bogie in another angle of set square.

13. Revolving chair trays according to claim 12, it is characterized in that: between two jiaos of two set squares coordinated at bogie, be provided with the second bearing pin, on the second bearing pin, turning set is provided with force block, and described force block has the stress surface contacted all the time with bogie corresponding site.

14. Revolving chair trays according to claim 13, is characterized in that: be provided with the 3rd bearing pin for promoting force block in bogie lower end, two ends, left and right and the bogie of the 3rd bearing pin are rotationally connected.

15. Revolving chair trays according to claim 14, is characterized in that: on the 3rd bearing pin, turning set is provided with axle sleeve.

16. Revolving chair trays according to claim 1, it is characterized in that: this end that swing component coordinates with bogie is equipped with the 4th bearing pin, bracket is provided with in base, one end and the bogie lower end of bracket are hinged, the other end of bracket is equipped with the 5th bearing pin, together with 4th bearing pin and both hook joints arranged in a crossed manner with the 5th bearing pin, make bogie pull bracket during carriage turns, and then pull swing component to make it rotate.

17. Revolving chair trays according to claim 16, it is characterized in that: on the 5th bearing pin, turning set is provided with axle sleeve, on the 4th bearing pin, turning set is provided with force block, and described force block has the stress surface contacted all the time with bogie corresponding site, and described axle sleeve contacts with stress surface.

18. Revolving chair trays according to claim 1, is characterized in that: be respectively provided with a spring support at the two ends of spring, and the two ends of spring offset respectively by the side plate of adjacent spring support and nut, base.

19. Revolving chair trays according to claim 1, is characterized in that: also comprise a regulating handle, and this regulating handle is connected with a sleeve, and described jacket casing is located at outside spring, and nut is fixedly installed at the bottom of sleeve cylinder.

20. Revolving chair trays according to claim 19, is characterized in that: described sleeve has an extension, and described regulating handle and extension are fixed with circumference, the mode of moving axially connects together.

21. Revolving chair trays according to claim 20, is characterized in that: on the sidewall of extension, be in axial direction provided with chute, and on the hollow wall of regulating handle, correspondence is provided with slide block, and slide block is stuck in chute.

22. Revolving chair trays according to claim 1, is characterized in that: described base comprises base plate and is vertically installed in the side plate of base plate both sides, and side plate is provided with the perforation penetrated for adjusting screw(rod) wherein.

23. Revolving chair trays according to claim 1, is characterized in that: bogie upper end and bracket are welded and fixed, and bogie lower end extends in base.

24. Revolving chair trays according to claim 6, it is characterized in that: be provided with the gas bar jack for gas bar of planting in the center of base, swing component is arranged around gas bar jack, with base center for boundary, the hinged place of swing component and base and spring are in the left and right sides of base center respectively, and adjusting screw(rod) is then in the both sides, front and back of base center respectively with bogie.