TWI235645B - Ergonomic chair - Google Patents

Abstract

A chair of the tilting type which includes a base, a seat and back, with the base pivotally supporting the seat with two parallel links of a four-bar parallel linkage, with one of the links extending to support the back. The four-bar linkage is duplicated on each side of the chair by forming the two opposite parallel links or cranks from the upturned ends of the tubes which pass through the base in parallel but vertically offset fashion, the base thus forming the fixed bar of the linkage with its opposite bar or coupler being formed by the seat. A spring within the base is operative on one (of both) of the tubes to urge the chair to an upright position. The tubes are pivotally connected to the seat and one of the tubes extends and is fixedly connected to the back. As the back tilts, the four-bar mechanism is engaged and lifts the seat which thereby uses the occupant's weight to counteract the reclining. Also disclosed is an adjustable armrest that can readily raised, or lowered, and optionally rotated in a horizontal plane. A further aspect of the present disclosure is a headrest that is pushed into place when the chair is reclined and retracted when the chair returns to an upright position.

Description

1235645 Α7 Β7 V. Description of the invention () Background of the invention 1. Field of invention (please read the notes on the back before filling out this page) The present invention is generally related to the device used to support the user in the seat, and is implemented in the best In this example, it is a reclining chair. In another preferred embodiment, the present invention relates to a chair having an automatic adjustable armrest. In yet another preferred embodiment, the present invention relates to a chair having an automatically adjustable headrest. In yet another preferred embodiment, the present invention is directed to having roll resistance that automatically adjusts as the user's weight increases proportionally and when the roll angle increases. In yet another preferred embodiment, the chair has a tilt mechanism that can change the angle of the seat and its support, increase the angle of the chair at maximum tilt, and provide a forward tilt position. 2. The previous technical description The reclining chair is usually used in the office. Usually, the back of the chair is tilted alone, or the back of the chair and the seat are tilted in a unit, or the back of the chair can be tilted in proportion to the seat. If the seat back is tilted alone, it usually causes a problem, β 卩 "tuck the tail of the shirt". This problem is particularly noticeable when the reclining of the seat back is not coordinated with natural human movements. This problem can also be highlighted because the user's hips tend to slide forward when the back of the chair is tilted backwards. When the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints the seat back and the seat as a unit, the user's feet tend to be lifted from the floor in the tilted position, causing the front edge of the seat to rest under the user's feet Excessive pressure just above the lateral knee. To overcome this problem, the pivot point of the tilting action can be moved sufficiently forward, and the user's feet can be stopped on the floor. Unwanted effect of this configuration: The angle between the user's body and feet has not changed. As a result, this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm). 1235645 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 __—_ B7___ 5. Description of the invention () The horizontal plane of the user's eyes shows an unexpected drop when the chair is tilted. In any reclining chair, it is desirable to position the tilt pivot point at the center of the body, or where the user's back often pivots (ie, through the axis of the user's hip joint). The pivot point of a reclining chair is usually displaced from the ideal pivot point. It is also desirable that the chair allows the angle between the user's body and feet to be opened so that the pressure of squeezing inside the body can be relieved. Of course, it is also desirable to provide a chair in which the user's feet can rest on the floor and the tilting motion is close to parallel to the natural human motion to avoid the problem of the usual shirt pull. It is also desirable to provide a chair that has a simplified structure and a concise, pleasing appearance that highlights the independent, separate appearance of the seat and back to the supporting frame. The applicant's earlier U.S. Patent No. 4,943,114 shows a solution to these problems. U.S. Patent No. 4,943,114 issued to Piretti discloses a chair with a small backrest link mechanism that allows the chair backrest and the seat to tilt. U.S. Patent No. 5,251,958 to Roer i.ch. et al. Discloses a chair with a synchronous adjustment device that uses the weight of the user to provide a restoring force, after the user has tilted the chair Can be restored to its upright position. U.S. Patent No. 5,486,035 granted to Koepke et al. Does not provide any illustrations. Lines 29-34 of the first paragraph of the specification state "here In the structure, the difficulty of tilting the chair, that is, the generation of tilting force, increases with the tilting of the chair, and the adjustment device is generally used to increase or decrease the paper size of the chair. The Chinese national standard (CNS) A4 specification (210 X 297 mm) ----------- install ---- 1 --- order --------- line ^^-(Please read the phonetic on the back? Matters before filling in (This page) 1235645 A7 B7 V. Description of the invention () Tilt tension, this kind of adjustment device changes the tension of the spring, or changes the tilt mechanism. " Although a chair with a chair arm is a conventional technique, so far, the chair arm is fixed or adjustable. If the chair arm is adjustable, any adjustment is not ideal and is very cumbersome. In addition, this conventional technique also includes a headrest leaning on a chair, including a reclining chair. However, this headrest usually provides little support to the user, i.e. the headrest still maintains its position relative to the back of the chair when the chair is tilted. Or, if the headrest provides a lot of support to the user, usually the headrest needs a very inconvenient adjustment. The rationale for thinking is that the backrest is tilted, and the market is adjusted. Although it is inclined, it's the right person. · Tune it again and again. It is divided into ten pieces and there is only one, so it ’s too important to use it. The external needs are annoying. The whole chair must be a week. Opposite messengers use special chairs to adjust the size of the body. The body must be unique, and the combination of the child's chair and the mechanics to adjust the body to adjust the body can be adjusted. Those who are appropriate should use whatever needs to be owed, for some reason. If you want to rectify it, you have to change your words. The quality of the adult is to use the actual method to make a seedless chair ------------ install -------- order --------- line (please read the back first (Please note this page before completing this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs

The eyes of the human being. I publish a copy of this book in a single copy, and use it as a heavy exercise tool to make -Imll available. The example of the sub-chair chair is a practical example and the low cost of the structure is simply a sub-chair. The simple sequence of the middle single is i chair-shaped, and the high-inclined dumping can produce its paper. The size of the paper is applicable to China National Standard (CNS) A4 (210 X 297 mm) 1235645 A7 B7 V. Description of the invention () (Please read the note on the back? Matters before filling out this page) Another object of the present invention is to provide a reclining chair, in which the frame supporting the seat and the backrest is pivotally connected to the seat, and fixedly Attaches to the backrest to accentuate the separate, separate appearance of the seat and back. Another purpose is to provide an armrest that can be adjusted at any time. These and other objects and advantages of the present invention will be understood from the following expanded description. In order to complete the foregoing and related aspects, the present invention includes features which will be described in detail later, and will be specifically indicated in the scope of the patent application. The following description and drawings illustrate the embodiments of the present invention in detail, but this is only to show a few principles of the invention Many ways can be applied. Briefly explain the advantages printed by the Intellectual Property Bureau of the Ministry of Economic Affairs' employee consumer cooperative. In terms of advantages, some embodiments of the present invention provide a user weight operation with a reclining back chair, in which the user weight carries the chair mechanism and automatically Adjust the tilt tension to tilt the seat back. In another preferred version of this embodiment, a user-operated chair provides a substantially uniform force against the tilt of the seat back within its range of movement. Furthermore, although this mechanism includes a spring, it does not rely on springs or other adjustments to increase or decrease the chair reclining force. Instead, the spring only provides a secondary or auxiliary force to the force provided by the user's weight. The spring does not require any adjustment. A chair operated by a user according to the present invention includes a seat having a seat and a backrest mounted on a support structure such as a wheel frame. The backrest is tiltable to the seat, and the structure of the chair and the relationship between the parts are such that when the backrest is tilted, the entire seat rises against the weight of the user. In this way, the weight of the chair is carried by the user's weight. The paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 1235645 A7 B7. All are reclined recliner chairs with the inner range required. } The reclining W reclining backrest chair makes the rear seat in the seat to be a good one. At the top of the pole, the length of the Lian Ying ’s ㈣-_ 经 经 至 到 部 ㈣ 座 ’is adjusted according to the weight, and the amount is small to make it equal to one inch and half to about 4 to 4 inches. The inch-inch Yingying back chair can be tilted and can have a chair with a volume of 1B and a heavy one to make it bright. The other one is used to make the complete mold lift to the full lift-the rear seat of the zone makes the tilt back SESj · S3 the tilt of the back of the chair is combined r the chair U The child seat arrives. For those who have a fixed weight on the buttocks, the hips can be twisted. Sometimes they are tilted obliquely. In this case, they can be planted. For example, they can be implemented in the back of the chair. Chair ΓΤ — Tilt shift, when the rotation L Μ ± € points 2 U transposition head pivot chair pivot, pivot; i think the back f i except mm rr ο f oblique body tilt} If the axis is flat Make α water ¾ together, use the theory of closing the chair and turning the hinges on the hips and thinking about the thinkers. Use this theory to communicate with the reasoned or to be inclined 3 As soon as the vomiting, intended to provide a model, and in order to send out, the example of this tilting, tilting, and backing up the chair must be equipped with another one to be able to plant a support for this headrest. . Use repetition to make the contraction (please read the note on the back? Matters before filling out this page). When the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints the catalogue, it is more useful than those who need it? The warp article holds a simple kind of easy to support and mentions 1. ， 立 者 a- 地 中 # ί Use YiF to make real changes, the ones that rely on the outer arm support, and the other for the sale, Timing City will be issued immediately, and the front can be tilted backwards or the forward structure. Jie Zhongshi implemented other than the implementation. Furthermore, the change of the resistance to lateral tilt resistance when the beard must be applied can be used to increase the tilt of the reclining chair pair. In the low-resistance tilt tilt mode, the tilt is reversed and the ij ΠΙΣTΗ is self-leveling. Before the side change, this paper applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 1235645 A7 ------ B7_____. This invention is completed without any adjustment by the user. (Please read the precautions on the back before filling this page.) Some preferred embodiments of the reclining chair of the present invention have a base, which pivotally supports the seat by the opposing links of two four-link mechanism. Generally, in this embodiment, a set of opposing links extend on each side of the chair to support the seat back. Embodiments of the present invention in which the reclining chair is generally provided with a fixed rod whose base forms a link set. This link group transmits the action of the rear link to the angle change of the front link. Some reclining chairs of the present invention have a spring in the base, which acts on a rod of the link set, forcing the chair to an upright position. This spring also helps to balance the tilting force of the user. The chair lifting mechanism of the tiltable chair of the present invention is usually not noticed by the user, and the chair does not lift the user's feet off the ground. The present invention provides a reclining chair in which the back of the chair pivots at an ideal pivot point, which overcomes the common problems of pulling the shirt tail and raising the feet of the prior art chair. The present invention provides a chair in which a seat base and a seat back are supported by a link group mechanism from a base, so that the angle of the user's body to the foot is increased when the seat back is tilted. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs The tilt of the seat and back can be achieved by a four-link linkage set. The four-link link set can be parallel or non-parallel. In one embodiment of the chair of the present invention, each side of the seat is supported by the links of a four-link link set. The base of the chair forms a second link. The third link extends to support the seat back. The fourth link connects the front of the base to the front of the seat. Link sets are duplicated in each side of the chair. The pivot of the connecting rod set is designed so that the user's weight can be balanced. The seat pivots. The paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) 1235645 A7 B7. 5. Description of the invention () (please Read the precautions on the back before filling this page), and the spring in the base acts on one of the links in the link set to force the chair back to the upright position, simply overcome the weight and keep the chair in the unused position In an upright position. Generally, when the chair is tilted by the user, the spring adds a small amount of restoring force. However, because the weight of the user determines the amount of force required to return the chair to the upright position, the force varies depending on the user and the degree of chair inclination. The chair of the present invention uses the user's weight to counteract the user's inclination. The links of the link set on each side of the chair can be pivotally connected to the seat, and the extended links are fixedly connected to the back of the chair to highlight the independent and separate appearance of the seat and back. Generally, the base below the seat base is a small, clean, and well-structured housing that houses the lower journals of the third and fourth links described above. The horizontal link above the base is orbital, and the seat pan is supported in the guide rail, allowing the seat to slide back and forth to adjust the seat depth. The position in the seat rail can be fixed by conventional mechanisms. It is best printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The back and seat parts are made of molded, very soft and elastic synthetic plastic, such as reinforced glass fiber or flexible high-strength materials. The seat consists of upper, lower, front and rear sections. Similarly, the seat back has upper, lower, front and rear portions. The upper part of the seat and the front part of the back are generally contoured and covered with traditional cushioning materials. The front area of the lower side of the seat (usually in front of the guide supporting the seat plate or support) is pivoted to the base, and the lower side of the back of the seat is connected by a link. ) A4 size (210 X 297 mm) 1235645 A7 Factory _ B7___ 5. Description of the invention () It is connected to the area below the seat back. When the seat is tilted, the rearward link (usually an extension of the backrest support) pivots around the pivot point behind the chair base. Due to this pivot, the pivot points under the seat support are raised slightly upwards and backwards. Move the seat support upwards and backwards Pull the front link (such as the upper horizontal seat support rail) and lift the front part of the seat. The seat is lifted against the user's weight, so the user's weight is used to "load" the seat back to resist the tilting force. As a result, the seat constructed in accordance with this aspect of the present invention has a uniform resistance to tilting due to the weight of the user who generates such resistance. Because the tilt tension is adjusted by the weight of the user, the greater the weight of the user, the greater the force required to tilt the seat back, and vice versa. In some embodiments of the invention, the chair has one or two armrests. Adjustable armrests are supported by i-pair rods that originate from the back of the chair. Preferably, the adjustment arm support bar comes from the "outer frame" of the fixed seat back. Most preferably, the chair with the adjusting arm is the reclining chair of the present application, and the adjustable arm of the present invention can be applied to most of any chair having a back. In a particularly preferred embodiment of the invention, the chair arm can be raised or lowered at any time. To disengage or reposition the arm, the distal end of the arm is raised slightly, such as 1 cm. Once the positioning mechanism is disengaged, the arm can be repositioned to any height at any time. When positioned, the arm is released and falls into proper positioning and re-engages with the positioning mechanism. In one embodiment of the adjustable arm of the present invention, the chair has two independent arms. In another embodiment of the adjustable arm of the present invention, the movement of one arm adjusts the second arm by the same amount in the same direction. In a particularly preferred embodiment of the present invention, the chair has a headrest, and when the chair is tilted -10- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling in this Page) -------- Order --------- ^ Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 1235645 A7 B7 V. Description of the invention () You can move forward to support the chair The user's head, and retract when the chair returns to its upright stop position. In this way, the user's head of the chair can be supported when it is most needed, i.e., when the user's head is not fully reclined in line with the user's back. However, when support is not needed ', i.e., when the user's head is in line with the user's back when in the upright position, the support is removed. It is best to move the head against an arc to mimic the natural movement of the head. Most preferably, a chair with an automatic headrest is a tiltable chair of the present application. The automatic headrest of the present invention can be applied to most of any chair with a backrest. In another particularly preferred embodiment of the present invention, another supporting mechanism may be used in the base or lower link position, so that the entire chair above the base is tilted forward, or tilted to the side, and locked in any position That is, at the pole or anywhere between the poles. Additional support mechanisms provide forward tilting of the seat and back in the working position, such as writing, and backward tilting provides additional tilt of the backrest. The term "stop position" as often used herein refers to the upright or forward leaning position of a chair when not in use. Brief Description of the Drawings Figure 1 is a side view of a reclining chair according to the present invention, showing the seat and back in an upright position. Fig. 2 is a side view of the reclining chair of the present invention, showing the seat and the back in the reclining position. Figure 3 shows the tilt of the headrest with adjustable headrest and adjustable armrest of the present invention-1 1-This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) (Please read the note on the back first) Please fill in this page for the matter) Packing -------- Order --------- Printed by the Consumers' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 1235645 A7 ____B7_ V. Description of the invention () Side view showing seat and back in upright position. Fig. 4 is a side view of a reclining chair with an automatically adjustable headrest and an adjustable armrest according to the present invention, showing the seat and back of the chair in a tilted position. Fig. 5 is a side view of a tiltable chair having a tilt mechanism according to the present invention, showing the seat and back in an upright position. Fig. 6 is a side view of a tiltable chair having a tilt mechanism according to the present invention, showing the seat and back in the tilt position. Figure 7 is a side view of the chair base used in the chair of the present invention. Figure 8 is a side view of a chair base that provides additional tilt to the chair in the rest position of the present invention. Figure 8A is an exploded side view of the chair base of Table 8. Figure 0 is a side view of a chair base that provides additional tilt for a chair of the present invention in an increased tilt position. Fig. 10 is a top view of an embodiment of the chair base of the present invention. Figure 11 is a side view of a better armrest containing the locking mechanism and its locking mechanism in the engaged state. Figure 12 is a side view of a better armrest containing the locking mechanism and its locking mechanism in the disengaged state. Fig. 13 is a side view of the locking mechanism of the other arm and its locking mechanism in an engaged state. Fig. 14 is a side view of the disengaged state of the other arm leaning locking mechanism and the locking mechanism. Figure 15 is the connection of the other arm by the locking mechanism and its locking mechanism. -12- ^ The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the back Please fill in this page for the matters needing attention) Packing -------- Ordering ----------- Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1235645 5. Side view of the state of the invention (11). Fig. 16 is a side view of the other arm leaning locking mechanism and its locking mechanism in a disengaged state. Figure 17 shows an equivalent side view of two interconnected armrest mechanisms. Figure 18 shows an equivalent side view of two interconnected armrest mechanisms. Figure 19 shows an equivalent side view of two arm rest mechanisms interconnected by a top support arm. Figure 19A is a cutaway view of the arm by the locking mechanism taken along the line 19A-19A. Fig. 19B is an exploded view showing the arm rest locking mechanism. Figure 20 shows a side view of the headrest mechanism of the present invention. Figure 20A shows a cutaway view of the headrest mechanism of Figure 20 taken along line 2 OA-2 0A. Fig. 20B shows a sectional view of the headrest mechanism in Fig. 20 taken along the line 2OB-2OB. Figure 20C shows a sectional view of the headrest mechanism of Figure 20 taken along line 2 OC-2 0C. Fig. 21 is an exploded view of an embodiment of the mechanism of the present invention in which the weight of a user who uses the chair in conjunction with each other counteracts the tilt of the separate back of the chair. Fig. 21A shows an exploded view of a device for movably mounting a seat on a seat supporting member according to an embodiment of the present invention. Figure 22 shows an exploded view of the automatic headrest adjustment. Fig. 23 shows a side sectional view of an embodiment of the auxiliary seat back adjusting mechanism. Figure 23A shows an exploded view of the embodiment of Figure 23. Figure 24 is a top view of the embodiment with the pivotable arm rests deployed. Figure 25 is a top view of the armrest pad with the pivotable armrest removed. -13- 1235645 A7 ------- B7_ V. Description of the Invention () Figure 26 is a side view of the pivotable armrest. Figure 27 is a rear view of the pivotable armrest. (Please read the precautions on the back before filling out this page.) Figure 2 8 is a cross-sectional view of the pivotable arm taken along the line 2 8-2 8 of the 2 6 _ center. Fig. 29 is a cross-sectional view of the pivotable arm taken along the line 2 9-2 9 of the second center. Figure 30 is a cross-sectional view of the pivotable arm taken along line 3 0-3 0 in Figure 26. Figure 31 is a cross-sectional view of the pivotable arm taken along line 3 χ-3 1 in Figure 26. Figure 3 2 is a sectional view of the pivotable arm taken along line 3 2-3 2 of Figure 26. Figure 3 3 is a sectional view of the pivotable arm taken along line 3 3-3 3 in Figure 26. Figures 3 and 4 are side views of preferred embodiments of the chair of the present invention incorporating the armrest of the present invention and the headrest of the present invention. Figure 34 A is a cross-sectional view of the chair back of Figure 34 taken along line 34 A-3 4A in Figure 34; and printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Figure 3 4 B is the chair of Figure 34 The back is a cross-sectional view taken along line 3 4 B-3 4B in Figure 34. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention contains many developments that can be added separately or incorporated into traditional chair designs. For example, the method and mechanism for tilting a chair back of the present invention may be separately -1 4-This paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 1235645 A7 ____B7______ 5. Description of the invention () is used Or, it can be used with methods and mechanisms of adjustable armrests, methods and mechanisms of adjustable headrests, and / or methods and mechanisms of tilting mechanisms. Figure 34 shows a chair incorporating many aspects of the present invention into a chair design, specifically including the method and mechanism for tilting the back of the chair, the method and mechanism for adjusting the armrest, the method for adjusting the headrest, and Institutions, and / or methods and institutions of tilting institutions. To understand the operation of the present invention, many separate aspects of the invention will be described separately. Initially, the method and mechanism for tilting the back of the chair will be described, in which the weight of the seat user is utilized to counteract the tilting force. Subsequently, other inventive aspects of the chair design of the present invention will be described. Referring to FIG. 1, the chair includes a base 110, a seat 111 fixed to a seat support 119, and a seat back support 1 1 3 supporting the seat back 1 1 2. The base 1 1 0 is supported on a pivot 1 1 4 which protrudes upward from the pentagonal caster stand 1 1 5. The end of the foot accommodates the caster 1 1 6 to support the chair on the floor 11 7. The seat 1 1 1 is supported by the seat support 1 1 9 and then supported by the seat back in the extension 123 and forwardly connected to the base 110 by the support arm 120. Specifically, the back support extension 1 2 3 is connected to the base 1 1 0 by the horizontal pivot point 1 2 4 and is connected to the seat support 1 19 by the horizontal pivot point 1 22. Correspondingly, the support arm 1 20 is connected to the base 110 by the horizontal pivot point 121, and is connected to the seat support 1 1 9 by the horizontal pivot point 118. As a result, the base 1 10, the support arm 1 2 0, the seat support 119, the back support extension 123, and the horizontal pivot points 118, 121, 122, and 1 24 form a substantially parallelogram-shaped link group, Can move in one direction between forward and downward positions (as shown in Figure 1), and the seat Π1 -1 5-This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) ) (Please read the note on the back? Matters before filling out this page) -------- Order --------- line Λ Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs Consumer Cooperatives 1235645 Ministry of Economic Affairs Printed by the Intellectual Property Bureau employee consumer cooperative A7 B7 V. Description of the invention () Movement in the other direction between the backward and upward position (as shown in Figure 2) A sharp forward angle of 101 is formed. When the chair is in the stopped position, this angle is about 5 degrees. It is preferably at least 10 degrees, and most preferably at least 20 degrees. However, when the chair is in the stop position, the acute forward lean angle 101 is usually less than 45 degrees, preferably less than 40 degrees. When the chair is in the stop position, the most common prior angle of inclination 101 is 26 degrees. Correspondingly, the base 110 and the back support extension 123 form an acute front angle 102, which is generally smaller than the forward lean acute angle 101. When the chair is in the stopped position, the acute forward tilt angle 102 is about 5 degrees. It is preferably at least 8 degrees, and most preferably at least 15 degrees. However, when the chair is in the stop position, the forward lean acute angle 102 is usually less than 40 degrees, and Zhengjia is less than 30 degrees. When the chair is in the stopped position, the most common angle of inclination before it is 10 2 is 18 degrees. It is preferred that the chair seat 1 1 1 counter the chair back support Π 3 and the lifting amount is 0.  Between 2 and 2 inches. The better seat lift is 0.  Between 4 and 1 inch. In a particularly useful embodiment of the reclining chair of the present invention, the seat is raised about 0 in front of it.  6 inches, rising about 0.  8 inches. As can be seen from the above, the horizontal pivot point 1 24 of the tilt of the seat back support is not the hip joint of the chair user. Therefore, the inclination of the seat back forms an arc around it, which is displaced from the arc formed by the hip joint of the user. However, in this simultaneous movement of the tilt mechanism of the seat lift, the user generates a net positioning that is the same as if the tilt center of the seat back and the hip joint were extended simultaneously. -1 6-This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) -------- Order ----- ---- 1235645 A7 ____B7_____ 5. Description of the invention () Figures 1 and 2 show the non-spring device 125. When the chair is used, it can force the seat back support 11 3 to return to its stop position. Generally, the seat 1 1 1 and the seat back 1 1 2 have a rigid outer shell like a plastic injection molded product. Preferably, the seat 111 has a layer of incompressible, movable colloid. For example, polyenes are available via colloids. Generally, the cushion of the chair seat 111 is about half an inch thick, and is positioned on top of a one-inch thick conventional soft foam layer. More preferably, the seat 1 1 1 is shaped to reduce the pressure point of the thickest part of the colloid. In general, the seat back 1 1 2 is a 3/4 inch thick traditional soft foam layer fixed to a rigid shell. Figure 21 provides local interaction using the body weight of the user to counter the tilting force and assist the seat back to return to the upright or stopped position. Again, the seat back 113 can be pivotally connected to the base 1 1 0 at the pivot point 1 2 4. The back support extensions 1 2 3 are continuous and pivotably connected to the seat support 1 1 9 at pivot points 1 22. Similarly, the front end of the base 1 10 is pivotally connected to the front end of the seat support 1 1 9 by the operation of the link 1 20 pivotally connected to the base 1 1 8 at the pivot point 1 1 8 and can be pivoted Turn the ground at the pivot point 1 2 1 to the seat support 1 1 9. Fig. 21 shows that the spring device 125 and the retractable spring guide 464 interact with the connecting member 3 50 fixed to the seat back support member 1 13 through the pillow block 7 1 5. Figure 21 also shows slots that allow the seat to be advanced forward or backward to allow the chair to more comfortably accommodate the user. In the embodiment of the figure, the slot can hold the seat in place. Figure 21A shows a device that can lock a movable seat in a desired position. In this embodiment, the lever 2 1 00 is raised and pivoted about the pivot joint 2 1 1 0, -1 7-This paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read first Note on the back, please fill in this page again.) -------- Order --------- Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1235645 A7 ____B7____ V. Invention Description () ( Please read the notes on the back before filling this page) and the pin 2120 moves out of the slot 2130. When the pin 2120 moves out of the groove 2130, the seat 111 is fixed by a pin 2140 having an enlarged head 2145 under the support member 119 and can be moved along the support member 1 1 9. The upper end of the pin 2 1 40 is fixed to the seat 1 1 1. Another mechanism for replacing the support arm 120 to interconnect the user's weight with returning the chair to its upright position has the same function as the above-mentioned four-link mechanism, and can be used instead of the four-link mechanism. For example, the support arm 120 can be replaced by a track mounted on the base 110 and a moving member protruding downward from the seat support 119. When the seat back support extension 1 2 3 is tilted and pivoted on the seat back 1 1 2 ', the seat support 1 1 9 pulls the moving member upward along a track inclined backward. Preferably, both the track or the moving member has a low-friction surface such as polytetrafluoroethylene. In the embodiment of the present invention having a headrest, it is preferable that the headrest has a conventional soft foam layer of one inch thick. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs The first embodiment of the base 110 of the present invention is shown in FIG. As shown, 'the base 110 is mounted on a pivot 114 via a piston 400. The piston 400 is a part of a conventional air cylinder that intentionally raises or lowers the height of the chair. The base 110 has a front pivot 1 2 1 and a rear pivot 1 2 4. In the tiltable chair of the present invention, the pivot shaft is connected to two links on a four-link set that interconnects the seat back and the seat up. The base 110 has a spring device 1 2 5 which applies force to the chair to keep the unused chair in an upright position. The spring device 125 is mounted around the cylinder 720, and the cylinder 720 is then mounted on the cylinder base 710. The cylinder base 710 is preferably fixed at a fixed point 700 formed integrally with the base Π0. -1 8-This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 1235645 A7 B7 V. Description of the invention () (Please read the notes on the back before filling this page) In addition, Figure 7 Also shown is a retractable spring guide 464 (sliably mounted in the spring cylinder 7 20). The top pillow block 7 1 5 is pivotally mounted on the top of the retractable spring guide 4 6 4 and abuts the connecting element 3 5 0 between the seat back support 1 1 3. Preferably, the top pillow block 7 1 5 is made of low friction material of polytetrafluoroethylene which is sold on the market under the registered trademark of TEFLON. Figure 7 also shows the extension 7 25 fixed to the seat support Π9. In the embodiment of the automatic adjustable headrest, it can form a fixed platform, so that the bar changes the tilt of the seat back into the headrest forward mobile. In another preferred embodiment of the present invention, the base 110, the seat 111, and the back 1 1 2 are tilted and have a slightly inclined two-part housing. For example, as shown in Figures 8 and 10, the top 3 2 0 of the base 1 10 accommodates horizontal pivot points 1 2 1 and 1 2 4. Figure 10 also shows that the housing 3 1 5 houses a conventional mechanism (such as the connecting rod 3 1 7), which is the first conventional cylinder used to release the pivot 114 mounted on the control base 110 for height. This embodiment also has a second conventional cylinder, that is, the cylinder 300. The function of the air cylinder 300 is to tilt the part of the chair above the base 110 and the parts fixed to the top 320. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 8 shows the side view of the base 1 1 0 in the forward tilt position. In this figure, the top 3 20 of the base is substantially horizontal. The base top 3 2 0 is pivotally connected to the base housing bottom 430 at the horizontal pivot point 121. The piston 420 of the air cylinder 300 is pivotally connected to a link set 430 at a pivot point 431. Next, the connecting rod group 430 is pivotably connected to the connecting rod group 4 3 3 at the pivot point 4 3 2 to form a pivot at -19- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 1235645 Α7 Β7 V. Description of the invention () The crankshaft is connected to the connecting rod group 4 3 7 at the pivot point 4 3 5 and the connecting rod group 4 3 7 is fixed to the base at the pivot point 4 3 9 Shell top 3 2 0. Through this linkage system, the cylinder 300 exerts force to change the tilt angle of the chair part above it. Fig. 8 also shows a conventional linkage assembly mechanism, which operates the conventional cylinder 400 in the housing 3 1 5 (for the connecting rod 3 1 7) and the pivot 1 1 4 mounted on the control base 1 10 height. The traditional release mechanism 40 5 is connected. In the preferred embodiment of the mechanism of Fig. 8, the counterclockwise rotation of the lever 3 1 7 activates the conventional release mechanism 405, and the clockwise rotation of the lever 3 1 7 activates the cylinder 3 00. At the same time, because of the slot 4 2 7, the clockwise rotation of the lever 317 allows the mechanism connecting the rod 3 1 7 to the cylinder 400 to "float" or slide in the slot 427, and thus does not actuate the conventional release mechanism 405. The first figure also shows a better spring mechanism, which can increase the roll back force when the roll angle is increased. Specifically, the spring 125 is mounted on a spring base 460, which is pivotally connected to a holder 458 in a container 456 of the spring housing 450. The arm 4 5 4 pivotally connects the spring case 450 to the lower base case portion 408. A spring piston 462 is installed in the spring 125, and the top of the spring 125 is a spring piston top 464 (or a retractable spring guide) that pushes against the top 46 of the receiving chamber 46 8. It is preferable that the top 466 of the receiving chamber 468 is arc-shaped, and it is equidistant from the holder 4 5 8 of the spring base 460 to the top 466 of the receiving chamber 468. This configuration allows the spring 125 and the piston combination or the retractable spring guide 464 to move a variable distance from the pivot 124, thereby increasing or decreasing the lever force of the seat back support 1 1 3. Fig. 9 shows a side view of the base 1 10 in the fully backward tilted position. In this figure, the top 3 20 of the base is substantially inclined. In particular, the arm 4 5 4 and its pivot -20-This paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) Pack --- ----- Order --------- The line is printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 1235645 A7 B7 V. Description of the invention () (Please read the precautions on the back before filling this page) Link The portion 4 5 2, in this figure, slides radially along the lower surface of the top portion 466 to the position farthest from the pivot 124. The top surface 466 has a curved angle at the lower surface, so that the arm 454 connected to the spring base 460, the spring piston 462 and the piston assembly (or retractable spring guide) 464 is tilted backward, so that the top of the spring 125 is from the pivot 1 24 Moving further, thus increasing leverage. The top of the retractable spring guide 464 is pivotally received in the pillow block 715 and can slide along the lower surface of the top 466 without changing the compression of the spring 1 2 5. Due to this repositioning, the top of the spring piston 464 pushes against the top 466 of the chamber 468 at a point further away from the horizontal pivot point 124. In other words, when the tilt mechanism increases its backward tilt, the center line of the spring 125 is tilted backward at an increased angle relative to the vertical plane. These changes increase the lever of the spring 1 2 5 in the backward tilted position, resulting in the tilt compression of the f spring 125, which increases as the tilt angle of the spring 125 from the vertical plane increases, and the spring 1 25 tilts from the vertical plane It decreases when the angle decreases. The net effect is to increase the resistance of the spring 1 2 5 to any further incremental deformation. The increase of the incremental deformation resistance of the spring 1 2 5 ', because the user transmits a larger load from the upper body to the backrest at a larger inclination angle, it provides a larger support for the increased load on the backrest. Of resistance. The incremental deformation resistance of the spring 1 2 5 ′ printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs will increase when the chair is tilted in other ways. For example, any inclination that moves spring 12 25 away from horizontal pivot point 1 24 can achieve this. In another embodiment, the spring 125 is mounted on a pivot base with a cover raised. The manual contact lever pushes against this cover thereby tilting the spring 1 2 5. This inclination increases the distance between the top of the spring 1 2 5 and the horizontal pivot point 1 2 4, thereby increasing the incremental deformation resistance of the spring 1 2 5 ′. -21-This paper size is in accordance with China National Standard (CNS) A4 (210 X 297 mm) 1235645 A7 B7___ V. Description of the invention () The function of the tilt mechanism of the reclining chair added to the present invention is shown in sections 5 and 6 In the figure. Figure 5 shows the chair in the stopped position. What is not shown in the figure is that another tilting mechanism can reach the forward tilting mechanism. Figure 6 shows another tilt mechanism of the tiltable chair in the enhanced tilt position. More specifically, in Fig. 5, the tops 3 20 of the bases 1 10 are in a substantially horizontal position. Because the top 3 20 is a fixed link in a four-link set that raises the seat 1 1 1, when the top 3 20 is horizontal, the seat 1 1 1 is also level. The lower base housing part 408 is pivotably connected to the top of the base 1 1 0 at the horizontal pivot point 1 2 1 3 20. When the chair user leans on the chair, the other tilt mechanism lowers the rear portion of the top portion 3 20, while the front portion of the top portion 3 20 remains approximately in the same position. The movement of the top 3 2 0 causes the 454 to pivot about the pivot 452, then lowers the spring housing 450, and increases the angle between the center line of the spring 125 and the vertical line passing through the base of the center line of the spring 125. This movement also increases the distance between the pivot point 1 24 and the point where the spring 3 50 contacts the seat back support 1 13. As described above, this rotation of the spring 1 2 5 increases the distance of the spring pressure center, and then increases the force for forcing the seat back to its stopped position. However, this spring force requires additional force provided by the user's weight to return the chair to its upright position when the chair user tilts. Preferably, another tilt mechanism is added to the forward tilt between about 1 degree and 15 degrees (that is, the rear end of the seat is raised relative to the front end), and it is best to add another tilt mechanism to about 3 degrees to 10 Degrees forward. More preferably, the tilt mechanism is added to a forward tilt of about 4 to 8 degrees. In a particularly preferred embodiment, the tilt mechanism incorporates a forward tilt of about 6 degrees. -22- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the note on the back? Matters before filling out this page). --I 1 * § ^ Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1235645 A7 B7 V. Description of the invention () (Please read the notes on the back before filling this page) As mentioned above, another tilting agency has joined Backward tilt between 1 degree and 12 degrees (that is, the lower end of the seat relative to the front end). It is more preferred that the tilt mechanism is tilted back to between about 2 and 10 degrees. In addition, it is more preferable that the tilt mechanism is tilted back to about 3 to 7 degrees. In a particularly preferred embodiment, the tilt mechanism incorporates a back tilt of about 5 degrees. After adding the extra back tilt, care must be taken to prevent the chair in use from tilting until its center of gravity moves much behind the pivot 1 1 4 'to prevent the chair from tipping backwards. In another aspect of the invention, the chair is equipped with a headrest, which is forced forward when the backrest is tilted. The more the chair tilts, the more the headrest will be forced to move forward. The preferred embodiment of the chair's automatic adjustable headrest includes an inclined back that is countered by the weight of the user and the preferred embodiment of the automatic adjustable headrest of the present invention. Figures 3 and 4 are shown. Specifically, in addition to many of the components already described in connection with the chair reclining mechanism of Fig. 1, this embodiment also includes an automatic adjustable headrest 370. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. The vertical adjustment lever 380 is mounted on the back of the headrest 370. Generally, a pair of parallel vertical adjusting rods 380 are installed behind the headrest 370. It is preferred that the vertical adjustment levers have an adjustment range of 2 to 10 inches, and more preferably that these vertical adjustment levers have a length adjustment range of 3 to 7 inches. A particularly preferred vertical adjustment lever has an adjustment range of about 5 inches. The vertical adjustment rod 380 passes through the seat 390. Preferably, the seat 390 and the vertical adjustment lever 3 80 interact with each other in such a way that the headrest 3 70 is restrained in a position relative to the seat 3 900. For example, the vertical adjustment lever 380 can be maintained in the position in the seat 390 by a conventional friction engagement method. Or, there are more than 23 vertical adjustment levers 380-This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 1235645 A7 "_ B7____ V. Description of the invention () (Please read the precautions on the back before Fill out this page) holes through which the mounting rod can pass and lock the vertical adjustment rod 3 80 in the holder 3 900. Another alternative method includes a traditional ratchet mechanism or virtually any other conventional use Device for fixing a lever in a position in the seat. The seat 3 9 0 is fixed to the trolley 3 8 5. The trolley 3 8 5 moves along a track on the inside of the seat back support extension 3 7 5. The seat back support The extension 3 7 5 and the corresponding track along the inner side of the back support extension 3 7 5 are curved. The curve of the back support extension 3 7 5 (and thus the inner track) and the movement of the user's head The radian is the same when the user leans forward or backward when he sits on the chair. Preferably, the radian has a center point that is consistent with the imaginary axis passing through the user's shoulder joint, and the radius from this center point to the user's ear The distance at the bottom is the same. The production co-operative consumer cooperative is printed at the trolley connection 3, 6 and the trolley 3 8 5 is pivotably connected to the pole 3 60 at point 3 6 7. The lower end of the pole 3 60 is pivotally at point 3 5 7 Is connected to the seat support extension 725, and then to the seat support 119. Because the length of the rod 360 is substantially fixed, the differential of the arc between the seat back 1 13 and the lower rod pivot 7 25 and the seat support The combination of the extra lift of piece 1 19 causes the lever 3 60 to be pushed up, and then moves the headrest support trolley 385 on its track to form the desired upward and forward movement. The upward force causes the trolley 3 8 5 to move along the chair The curved path of the track on the inside of the back support extension 3 7 5 is moved. This movement of the trolley 3 8 5 then moves the headrest from its position aligned with the back support 1 1 3 to the position shown in FIG. 4 Forward position. As a result of this movement, the headrest 3 70 is positioned by the tilt of the chair and enters a position to provide the support required by the head of the chair user when the user tilts. -24- This paper size applies to Chinese national standards (CNS) A4 size (210 X 297 mm) Consumption cooperation among employees of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed 1235645 A7 __B7___ 5. Description of the invention () The sectional view of Figure 20A shows the spring and piston mechanism that can be used to fix the vertical adjustment rod 3 80 in the appropriate position in the holder 390. The sectional view of Figure 20B shows How the tongue 3 87 of the trolley 3 8 5 fits into the track groove 3 7 7 of the seat back support extension 3 7 5. The cutaway view of Fig. 20C shows how the seat back support extension 3 7 5 can be conventionally used. Fixing means, such as screws, to the seat back support 1 1 3. Figures 20 and 22 provide another alternative method of an embodiment of the automatic adjustable headrest of the present invention. Above and below the headrest 3 70 are connected by vertical adjustment levers 380. The vertical adjustment rod 3 80 passes through the seat 3 9 0 as described above. The seat 3 90 is fixed to the upper part of the trolley 3 8 5. Near the lower part, the pole 360 is connected to the trolley at points 3 6 5. The table: ί 3 8 5 moves along the track of the seat back support extension 3 7 5 and is driven by the force applied by the rod 3 60 to the cart 3 8 5. In this embodiment, the track is a groove 3 7 7 in the inside of each seat back support extension 3 7 5. For subsidy purposes, the trolleys 3 8 5 have tongues 3 8 7 on each outer side to fit into the grooves 3 7 7. Another aspect of the present invention is to provide a mechanism for fixing the position of an adjustable arm that can be used in any chair, including the tiltable chair of the present invention. Figures 11 and 12 show a preferred embodiment of the mechanism for fixing the position of the adjustable arm. In Figure 11 this mechanism is engaged and the arm is fixed in its position. The same mechanism is shown in Figure 12, where the mechanism is disengaged and the position of the arm can be changed at any time. More specifically, Figure 11 shows that the armrest 600 is in the used (and locked) position. -25- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) ------- ---- Equipment -------- Order --------- Line ^^-(Please read the precautions on the back before filling this page) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1235645 A7 ___B7___ 5. Description of the invention (). The armrest 600 is fixed to the corresponding parallel rods 625 and 630 by a pair of pivot joints 615 and 620. These rods 625 and 630 are connected to the seat back 113. In this embodiment, the seat back 113 has at least two ratchet surfaces 640 and 650 on opposite sides of the inside of the seat back 113. The locking lever 6 7 5 is locked on the lever 625 by the connecting device 660. The locking lever 6 7 5 has a ratchet surface to assist the ratchet 640. Similarly, the locking lever 670 is locked to the lever 630 by the connecting device 665. The locking lever 670 has a ratchet surface to assist the ratchet teeth 650. When the arm 610 is slightly raised at the end 610, as shown in FIG. 12, the rod 625 is pushed backward, while at the same time the rod 630 is pushed forward. The movement of the levers 625 and 630 disengages the auxiliary ratchet surface 645 from the ratchet tooth 640 and the ratchet surface 655 from the ratchet tooth 650. In this disengagement condition, the arm can be repositioned with a small amount of force. In order to assist the ratchet surface with the auxiliary ratchet, the lock lever (670 and 675) has a chamber in which the spring 3 4 can push against the piston 6 9 0, and then push against the back support arm 1 1 3 The inner wall of the chamber is connected with the driving ratchet surface and the auxiliary ratchet. Generally, the armrest is fixed to the back of the chair, about 6 to 12 inches above the back of the seat. Generally, when a chair has two armrests connected together, the two armrests are connected by a pair of substantially "C" shaped rods. The locking mechanism interacts with these "C" rods at the point where the rod passes through the seat back support, or at the shell mounted on the seat back for this purpose. When the armrests are not interconnected, the rod shape may be approximately a quarter of a circle. However, these shapes are general features, and any shape can be used to provide -26- this paper size applies Chinese National Standard (CNS) A4 specifications (210 X 297 public love) (Please read the precautions on the back before filling this page ) -------- Order --------- 1235645 A7 B7 V. Description of the invention () Achieve (i) Position the two armrests parallel to the two sides of the seat (if the armrests are added to this When the level adjustment device is invented, the armrest must be parallel to both sides of the seat when the arm is in the center position) and (ii) does not interfere with the user sitting on the chair. U.S. Patent No.  5,29 2,09 7 discloses a number of alternative locking mechanisms that can be used at any time to support the armrest of the present invention. This patent is incorporated herein by reference. Figures 13 and 14 show another embodiment of the mechanism for fixing the adjustable armrest position. In this embodiment, only the lower rod 6 3 0 has a ratchet tooth surface and the ratchet tooth 6 50. Correspondingly, FIGS. 15 and 16 show still another embodiment of the mechanism for fixing the adjustable arm rest position, in which only the upper rod 6 2 5 is connected to the ratchet surface 645 and engages with the ratchet 640. In a chair having left and right armrests, a mechanism for fixing an adjustable armrest position-In a preferred embodiment, two armrests are interconnected, so that the adjustment of one armrest also adjusts the other. In this embodiment, the preferred configuration is that only the upper rod 6 2 5 is on one arm, that is, the right arm rests on the ratchet surface 645 and the auxiliary ratchet 640, and the other, in this example, the left arm, only the lower rod 6 3 0 has ratchet surfaces 6 5 5 and auxiliary ratchet teeth 6 5 0. In this embodiment, there are two ratchet mechanisms (one for the upper lever and the other for the lower lever) between the two arms, which cooperate with each other to control the positioning of the arms. Figure 17 provides an equivalent view of a pair of armrests, with the upper and lower rods interconnected. Specifically, the armrest 600 is supported by an upper rod 625 and a lower rod 630. In the seat back support arm 1 1 3, the upper rod 6 2 5 and the lower rod 6 3 0 can be engaged with or disengaged from the positioning mechanism. The upper rod 6 2 5 is interconnected by a connecting rod 6 3 7 and the lower rod 6 3 0 is interconnected by a connecting rod 6 3 3. Figure 18 provides an equivalent view of a pair of armrests, where the upper and lower levers are -27- This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before (Fill in this page) Install -------- Order --------- Printed by the Consumers 'Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Consumers' Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 1235645 A7 __B7____ Invention Description () Each is independent. In this embodiment, the repositioning of one arm does not affect the positioning of the other. Figure 19 provides an equivalent view of a pair of armrests, with the upper rod 625 interconnected. In this embodiment, the repositioning of one arm is transferred by the connecting rod 637 to the repositioning of the other arm. In another embodiment, the connecting rod 637 may include conventional means for attaching or detaching from the rod, such as a slider or a set of screws. In this embodiment, the user may choose to adjust one armrest to adjust the other when using the connecting rod, or to adjust one armrest independently of the other when the connecting rod is disengaged. Figures 23 and 3 show a further aspect of the invention, which can be incorporated into a recliner chair or any chair with a back support 1 1 3 and a separate seat back 1 1 2 according to the invention. ^ In this embodiment, the track 900 is installed on the front side of the seat back support 1 13. The seat back 112 has a pair of trolleys moving on these tracks 900. In addition, the track 900 or the trolley 910 has a conventional locking mechanism for fixing the position of the trolley 910 on the track 900. A useful conventional locking mechanism ratchet mechanism allows the trolley 9100 to clamp the rod, bolt mechanism on the track 9 00, and a mechanism in which pins are inserted to fix the trolley position. In a particular embodiment of the trolley 910 and the track 900, the trolley 910 also has a traditional pivot mechanism so that the seat back 1 1 2 can be slightly rotated around this pivot, and further adjustments can be provided to better support the use of the chair By. Such an embodiment is shown in Fig. 23A. In order to fix the trolley 910 in place, the lever 920 is fixed to the trolley 910. When pin 930 is connected to multiple slots 940-28- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) Pack- ------- Order --------- Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, Line 1235645 A7 _B7____ 5. Description of the invention () It can be installed on the pole 920 at one time. Conversely, when the rod 920 is pushed and the pin 930 is withdrawn from the slot 940, the trolley 910 can move up and down along the track 900, and then when the rod 9 20 returns to its engaged position, the pin 930 enters another new slot 940 And lock the seat back 1 1 2 in position. A spring can be used to force the rod 920 into the joint. In addition, the seat 1 1 1 or a conventional seat plate directly below the seat 1 1 1 can be mounted on a pair of trolleys and moved along a track provided on the top of the seat support 1 1 9. It is best that the trolley also has a traditional device to fix the trolley on the track position. In addition, it is desirable that such tracks have stops at each end to prevent the trolley from moving beyond the end of the track. Since the seat 1 1 1 is placed on such a track mechanism, the user can be provided with another device to ensure that the chair conforms to the geometric shape of the user's body and vice versa. Figures 23 to 33 show another mechanism for armrests, which can be added to the adjustable armrest of the present invention, or added to a traditional armrest to make the armrest pivotally reposition horizontally. For example, as shown in Figure 24, the armrest 600 can pivot inward or outward. This additional pivoting of the armrest allows the user to rest the arm under the user's forearm when performing a task such as typing on a keyboard. As a result, the chair provides more support to the user and is therefore believed to be less tired when using the chair. Referring to Figure 25, there is shown an embodiment of a pivoting arm rest without a padding top 800. At the beginning of the back of the armrest 6 0, a U-shaped hook base 8 1 0 is fixed on the rods 625 and 630 to support the armrest 600. A pivot pin in the U-hook base 810 allows the armrest 600 to rotate about the pin 805. However, in order to limit -29- this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the note on the back first? Matters before filling out this page) Loading -------- Order --------- Line edge 1235645 A7 B7 V. Description of the invention () (Please read the precautions on the back before filling this page) The range of rotation in the armrest 6 0 0, there is a pointer arm 8 2 0 is fixed to the pivot pin 8 0 5, and the movement of the pointer arm 8 2 0 is restricted by the pointer arm restricting member 8 1 5. In addition, in order to prevent the free pivoting of the armrest 600, the armrest also has a rod 8 2 5 which has a groove so that the pointer arm 820 can be locked thereon. The cam follower 840, the cam cutout 84 5 and the slide lock-release controller 8 3 5 cooperate to lock in place (or swing freely). When the slide lock-release controller 8 3 5 is in the position shown, the spring 830 forces the lever 82 5 to drive toward the pointer arm 820 and locks the pivot arm 600 in place. However, when the slide lock-release controller 8 3 5 slides into its alternate position, the cam follower 840 is placed in the alternate position in the cam cutout 845, so that the tension of the spring 8 3 0 to the lever 8 2 5 is Release, thus moving the pointer arm 8 20 into a different groove. If the cam follower 840 is left in its restrained position, the lock lever 8 2 5 is disengaged and the armrest 600 can move freely. In another preferred embodiment of the pivot arm, the distance between adjacent grooves represents a pivot of about 5 °. Therefore, if there are six grooves, the arm can pivot about 30 ° with 600. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperatives. Figure 26 shows a side view of an embodiment of a pivoting armrest. In this figure, the armrest 600 is fixed to the rods 625 and 630 by conventional fastening devices 615 and 620, respectively. on. Available fastening devices include screw caps and bolts' and U-shaped hook pins. In this figure, a U-shaped hook base 8 10 and a pin 8 05 are shown. In addition, the pointer arm restricting member 815 is displayed in the pointer arm 820 plane. The spring 8 3 0 forces the lever 8 2 5 into the pointer arm 8 2 0. The slide lock-release controller 8 3 5 protrudes slightly outward from the armrest 6 0 0. Bolts 8 50 secure the top of the pad to the armrest body. -30- This paper size is in accordance with China National Standard (CNS) A4 (210 X 297 mm) 1235645 A7 B7 V. Description of the invention () It is best to slide the lock-release controller 8 3 5 on one side to be used The thumbs' and below the inner end of the user's fingers on the other side, the user can adjust the pivot position of the armrest at any time. Figure 27 shows the pivot arm back. In this figure, the u-shaped hook base 810 and the sliding lock-release controller 8 3 5 are clearly visible. Figure 28 shows a cross section of the arm taken along line 6 0 taken along line 2 8-2 8 in Figure 26. In this figure, the lock and release positions of the slide lock-release controller 8 3 5 are clearly visible. Figure 29 shows a cross section of the armrest 600 taken along line 29-29 in Figure 26. Figure 30 shows a cross section of the armrest 600 taken along line 30-30 in Figure 26. Figure 31 shows a section of the armrest 600 taken along line 31-31 in Figure 26. Figure 32 shows a cross section of the armrest 600 taken along line 3 2-3 2 in Figure 26. Figure 33 shows a cross section of the armrest 600 taken along line 3 3-3 3 in Figure 26. Component symbol comparison table 3 4 Spring 1 10 Base 111 Seat 112 Seat back 3 1-This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the note on the back first? Matters (Fill in this page again) Packing -------- Order --------- Printed by the Consumers 'Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 1235645 A7 _B7 5 Description of the invention (113) Back support 114 Pivot 115 Five-leg caster stand 116 Caster 117 Floor 1 19 Seat support 120 Support arm 121 刖 Pivot 123 Back support extension 124 Horizontal pivot point 125 Spring device 3 00 4 Cylinder 3 15 Housing 3 17 Connecting rod 320 Top 350 Connecting element 370 White moving adjustable head 375 Back support extension 377 Track groove 380 Vertical adjustment rod 385 Trolley 387 Tongue 390 Seat -32- (Please (Read the precautions on the back before filling this page.) Applicable to China National Standard (CNS) A4 specification (210 X 297 mm) 1235645 A7 B7 V. Description of invention (400 405 408 427 430 43 1 432 433 433 435 437 4 3 9 · 450 452 454 456 458 460 462 464 466 468 600 Piston traditional release mechanism Lower base housing part slot base bottom pivot point pivot point connecting rod group connecting rod group pivot point connecting rod group pivot point spring case pivot connection arm arm housing bearing spring base spring Piston retractable spring guide top arm chamber (please read the precautions on the back before filling out this page) -------- Order --------- Employee Cooperative of Intellectual Property Bureau, Ministry of Economic Affairs Printed -33 This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 1235645 A7 B7 V. Description of the invention (Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 610 End 615 Pivot joint 620 Pivot Joint 6 2 5,630 Rod 633,637 Connecting rod 640,650 Ratchet surface 660 Connecting device 665 Connecting device 670 Locking rod 675 Locking rod 700 Fixing point 710 * Cylinder base 7 15 Pillow block 720 Cylinder 725 Extension 805 Pin 810 U-shaped Base 815 Pointer arm limiter 820 Pointer arm 825 Lever 830 Spring 835 Slide lock-release 840 Cam follower-34- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read first Note on the back, please fill in this page again.) -------- Order --------- Coil 1235645 A7 B7 Description of invention () 845 Cam cut 900 Track 9 10 Trolley 920 Rod 930 Pin 940 Slot 2100 Pole 2110 Pivot joint 2120 Pin 2130 Slot 2140 Pin 2145 * Expansion head (please read the precautions on the back before filling this page) Installation ----- Order i ------- Intelligent Property of the Ministry of Economic Affairs The paper size printed by the Bureau ’s Consumer Cooperatives applies the Chinese National Standard (CNS) A4 (210 X 297 mm)

Claims (1)

1235645 6. Patent Application No. 89110788 "Ergonomic Chair" Patent (Amended in January 1992) Patent Application 圔 = 1 · —A kind of chair, which includes: a) —Support frame, which has at least two front and At least two rear pivots; b) at least two front rods pivotally connected to the front pivots; c) at least two rear rods pivotally connected to the rear pivots; d) a chair Seats, which are pivotally fixed to the front and rear rods at positions separate from the front and the rear pivots; and e) a reclining seat back frame, which is pivotally fixed to the The support frame 'is also connected to the rear rods to effectively transfer the tilt of the seat back frame to the upward movement of the rear rods, and also to pull up the rear rods in an upward direction in turn. 2. The chair according to item 1 of the patent application range, wherein each front foot forms a front inclination of at least about 5 ° with the plane of the top of the base. 3. The chair of item 1 in the scope of patent application, which additionally includes an adjustable armrest. 4. A reclining chair comprising: a) a chair caster frame; b) a base mounted on the chair caster frame; c) a chair seat and a tiltable chair back that are pivotably fixed to the base; d ) A substantially horizontal rearwardly protruding arm is mounted on a group of parts including a chair caster frame, a base and a seat; 1235645 VI. Patent Application Scope e) The track extends from the seat back along an arc-shaped path; Removably mounted on the track; g) a pole connecting the protruding arm and the trolley; and h) a headrest mounted on the end of the trolley away from the seat. 5. If the chair of the scope of patent application No. 4 includes an adjustable armrest. 6. If the chair of the scope of patent application item 4, wherein the pivot installation of the seat and the back includes the extension of the seat back from the pivot point on the base to the support of the seat, the The extension forms a front inclination of at least about 5 ° with the plane of the top of the base. 7. The chair according to item 6 of the patent application, further comprising a pair of front feet, which can be pivotally fixed to the front side of the base and the front side of the seat support, and form at least about 5 ° with the top plane of the base. inclination. 8 · A headrest combination used in a chair with a tiltable backrest, the headrest combination includes: a) a headrest with a vertical mounting rod; b) a headrest mounting bracket, which is fixed to the headrest A rod mounted vertically, and slidably fixed to a rail attached to the back of the chair; and c) a rod used to be fixed to the chair. 9. A chair comprising: a) a chair base; b) a seat fixed to the chair base; 1235645 VI. Patent application scope C) fixed to the back of the chair; d) substantially "C" type The upper bar, wherein the center of the "c" upper bar is fixed to the back of the seat back; e) the substantially "C" lower bar, wherein the center of the "C" lower bar is fixed to the back On the back, the "C" upper rod is fixed to the back of the chair, below the point of the back; f) a left arm is fixed to the "C" upper rod and the "C" lower rod is close to the chair The left end of the rod; and g) a right arm is fixed to the "C" upper rod and the "C" lower rod near the end of the rod on the right side of the chair. 10. The chair of claim 9 includes: A back arm interface is located at the back of the chair approximately 6 to 12 inches above the seat, and the back arm interface has a first hole for receiving the A "C" upper rod and a second hole to receive the "C" lower rod. 11. For example, the chair of the scope of patent application No. 9 further includes: a mechanism in the back arm interface for fixing the arm rest position. 1Z The chair according to item 11 of the scope of patent application, wherein the mechanism for fixing the position of the armrest is released by raising the distal end of the armrest and re-engaged by releasing the armrest. B—A kind of chair, including: a) a chair base; b) a seat fixed to the chair base; 1235645 VI. Scope of patent application c) fixed to the back of the chair; d) about one quarter One circular upper rod, wherein the center of the approximately quarter circular upper rod is fixed to the back of the seat back; e) an approximately circular lower rod, wherein the The center of the lower quarter of the approximately one-quarter circle is fixed to the back of the seat back, below the point at which the upper quarter of the approximately one-quarter circle is fixed to the back of the seat back; and f ) An arm is secured to the approximately quarter-round upper post and the approximately quarter-round lower post near the end of the post. 14. If the chair of the scope of patent application No. 13 further includes: a back arm interface is located at the back of the chair about 6 to 12 inches higher than the seat, the back arm interface has a first hole for To receive the approximately one-quarter circular upper rod, and a second hole to receive the approximately one-quarter circular lower rod. 15. For example, the chair of the scope of patent application No. 14 further includes: In the back arm interface, there is a mechanism for fixing the position of the arm. 16. The chair according to item 14 of the scope of patent application, wherein the mechanism for fixing the position of the arm includes a ratchet surface and a ratchet surface. 17. The chair as claimed in claim 14 wherein the mechanism for fixing the position of the arm includes a plurality of ratchet surfaces and ratchet surfaces. 18. — * An armrest that can be pivoted in the horizontal plane, including: a) a bracket used to be fixed to the armrest support arm; 1235645 VI. Scope of patent application b) —one fixed to the bracket A vertical pivot; C) a support arm rotatably fixed to the vertical pivot; and d) a mechanism for locking the arm against a fixed position in a moving horizontal plane. 19 · ~ A chair with a tiltable back, comprising: a) ~ a base supporting the seat support; b) a seat mounted on the seat support; c) rotatably fixed to the chair Seat back; and d) a headrest is slidably fixed to the backrest, which can be affected to move the headrest forward when the backrest is moved backwards. A chair with a tiltable backrest includes: a) a base supporting a seat support; b) a seat mounted on the seat support; c) rotatably fixed to the seat The back of the seat; wherein the seat support includes a spring mechanism that can act to provide resistance to turning the seat back, which increases when the seat back rotates from its stopped position. 21 * A method of using a chair comprising: a) tilting the back of the chair; b) raising and moving the seat back simultaneously with the tilting of the seat back; and 0 using the force generated by the seat Raise the chair back and return to the upright position. 1235645 VI. Scope of patent application 22. The method of item 21 of the scope of patent application, wherein the seat is raised at an acute angle of at least about 5 ° from the horizontal axis. 23. The method according to item 21 of the scope of patent application, wherein a predetermined point on the chair seat is raised along an arc-shaped path, so that the stop position of the predetermined point is on the arc-shaped path from the horizontal base of the chair The shaft is raised at least about 5 °. 24. A method for adjusting the vertical position of the arm, including the steps of: a) raising the distal end of the arm to a height greater than the height of the middle end of the arm; b) positioning the arm against a heavy position; and c) The distal end is released to affect returning the distal end to the same height as the middle end of the arm. 25. A method for adjusting the vertical position of an armrest, comprising the steps of: a) positioning the armrest; and b) releasing the armrest to engage a locking mechanism that affects the armrest to its position On the site. 26—A method for adjusting the vertical position of the arm, including the steps of: a) tilting the back of the chair; b) transforming the tilting motion into upward force; c) using the upward force to move the headrest into an appropriate position g . 27. The method according to item 26 of the patent application scope, further comprising: a) returning the chair back to an upright position; b) transforming the return movement into downward force; 1235645 VI. Patent application scope c) using the downward direction Power to return the headrest. 28. —A method for adjusting the vertical position of the chair's headrest 'includes the steps of: a) tilting the back of the chair; b) simultaneously along the center corresponding to the shoulder of the chair user, and the shoulder of the user The distance between the head and its ear is a curved path with a radius to move the headrest. 29. A method for changing the restoring force generated by a spring in a tiltable chair, the tiltable chair having the pivot point of the tilt and the point at which the spring exerts the force, the steps include: a ) Change the distance between the pivot point of the tiltable chair and the point where the spring exerts this restoring force. 30. The method of claim 29, wherein the restoring force can be increased by increasing the distance between the pivot point of the tiltable chair and the point where the spring exerts the restoring force. 31. The method of claim 29, wherein the distance between the pivot point of the tiltable chair and the point at which the spring applies the restoring force can be increased by tilting the spring backward from the pivot point. 32. A method of using a chair, including: a) tilting the back of the chair back; b) raising and moving the seat back simultaneously with the tilting of the back, the rearward movement starting from the beginning of the lifting motion Start; and 1235645 6. Scope of patent application C) Use the force generated by the seat to raise the seat back and return to the upright position.