The Related Art

The invention relates to a sitting apparatus having synchronous mechanism providing body ergonomy.

The invention particularly relates to a sitting apparatus consisting of seat and back rest containing several parts, providing harmony of the cavity of sitting person as per his/her weight and size, taking its former shape after the load is removed when the sitting is over, where the said parts fitting to the sitting area of the person are capable to move synchronously in respect to each other as per body structure.

The invention also consists of a sitting apparatus designed as at least three-part seat reducing the pressure at sacral part during sitting.

Background of the Related Art

Today several chair and seat embodiments are used in enclosed locations such as home, office, conference and seminar halls, cinemas, theatres and similar locations. Such chair and seats have been designed in various ways to ensure comfort of people. Particularly, people sitting on seats in the locations such as conference halls, cinema, theatre halls for long time periods suffer from pain in back and waist parts. The biggest reason for it is that the back rest of such seats are fixed and therefore the seat fails to fully fit to the back parts of person sitting on it.

There are also types of seat s which are capable to move as per back parts of the sitting person. However, this movement occurs in a manner the motion axis is the part where the back rest part meet the sitting part. In other words, the pack part moves as a whole. For that reason, back and waist part of the person cannot become fully in harmony with the back rest part and the person usually suffers from pains and disorders particularly in waist part. Moreover, seat parts of such seats and chairs are also made as a single part. For that reason, as the part where the body contacts the seat part does not contact onto the seat ergonomically, it causes disorders in persons sitting for long time. Such disorder occurs in various parts of the body but long time sitting particularly cause pressure on sacral part of the user.

No patent application for product similar to the one being subject of the invention has been seen. However, patent application no. EP 1301107 discloses an ergonomic office chair with an extending foot. The position of the outstretched hand of a user in relation to the table hardly changes, while the seat moves back and forth on the chair and the backrest tilts. The chair retains its normal function as long as the back is extensively tilted. However, the chair contains a backrest of one single part and a seat part. In conclusion, the need for a sitting apparatus eliminating the above mentioned problems and disadvantages, consisting of multi parts, containing seat and back rest part, and where the pats are capable to move synchronously with each other in harmony with body structure and inadequacy of the existing solutions have made necessary to make development in the related art.

Purpose of the Invention

From the current status of the related art, the purpose of the invention is to develop a sitting apparatus consisting of seat and back rest containing multi parts which are capable to make synchronous movement as per each other in harmony with body.

Another purpose of the invention is to enable the person to sit on the back rest and seat part of the sitting apparatus ergonomically by help of the synchronous movement of seat and its back rest consisting of multi parts in respect to each other. In addition, the pressure on the sacral part of the person is reduced by the medium seat part provided in middle part of the double seat of the sitting part. The synchronous movement of back rest and seat consisting of several parts ensures full grasp of the body of the sitting person. Alternatively the synchronous movement of back rest and seat consisting of four parts ensures full grasp of the body of the sitting person.

A further purpose of the invention is to prevent the health problems that might occur to the back and waist parts of people sitting on the seat for long time particularly in conference and seminar halls, cinema, theatre and other similar public locations.

Another purpose of the invention is to provide a sitting apparatus taking form in harmony with the sitting area of the sitting person and taking its former form when the sitting person stands upon end of sitting action and thus providing protection of sacral part.

Another purpose of the invention is to prevent the health problems that might occur to back and waist parts by means of protection of the sacral part.

In order to achieve all advantages mentioned above and to be understood better with the details given below, the invention is a sitting apparatus containing two seat parts located on right and left and moving member fitting to sitting area of the sitting person and moving in harmony within itself on the seat profile, medium part located on the spring member moving up and down and thus preventing pains that might occur on back and waist part by reducing the pressure on the sacral part, providing a high level of ergonomy and providing comfort of person. The structural and characteristics features of the invention and all advantages will be understood better in detailed descriptions with the figures given below and with reference to the figures, and therefore, the assessment should be made taking into account the said figures and detailed explanations. Description of Figures

Figure 1 Is a rear perspective view of the sitting apparatus consisting of two back rest and two sitting parts being subject of the invention. Figure 2 Is a front perspective view of the sitting apparatus consisting of two back rest and two sitting parts being subject of the invention indicating demounted position.

Figure 3 Is a detailed perspective view of the back rest of the sitting apparatus consisting of two back rest and two sitting parts being subject of the invention.

Figure 4 Is a lower perspective view of the sitting part of the sitting apparatus consisting of two back rest and two sitting parts being subject of the invention.

Figure 5 Is a front view of the sitting apparatus consisting of four back rest and two sitting parts being subject of the invention.

Figure 6 Is a side view of the sitting apparatus consisting of four back rest and two sitting parts being subject of the invention.

Figure 7 Is a front perspective view of the sitting apparatus consisting of four back rest and two sitting parts being subject of the invention. Figure 8 Is a rear perspective view of the sitting apparatus consisting of four back rest and two sitting parts being subject of the invention. Figure 9 Is a perspective view of the back rest of the sitting apparatus consisting of four back rest and two sitting parts being subject of the invention in demounted position.

Figure 10 Is a perspective view from a different angle of the back rest of the sitting apparatus consisting of four back rest and two sitting parts being subject of the invention in demounted position.

Figure 11 Is a front perspective view of the sitting apparatus consisting of four back rest and three sitting parts being subject of the invention in mounted position.

Figure 12 Is an upper two dimension view of the sitting apparatus consisting of four back rest and three sitting parts being subject of the invention in mounted position.

Figure 13 Is a lower perspective view of the sitting apparatus consisting of four back rest and three sitting parts being subject of the invention.

Figure 14 Is Detail A perspective view of the sitting part of the sitting apparatus consisting of four back rest and three sitting parts being subject of the invention. Reference Numbers

30 Sitting apparatus

31. Head rest part

32. Back rest part

33. Sitting part

34. Foot

35. Arm rest

35.1 Armrest profile

35.2 Armrest profile connection

36. Back rest carrying profile

37. Back rest part

37.1 Lower back rest part

37.2 Upper back rest part

38 Leaning part

39 Connection point

39.1 Lower back rest connection point

39.2 Combining point:

39.3 Upper back rest connection point

40. Back rest connection member

41. Bolt

42. Motion limiting pin

43. Sheet spring

43.1 Lower back rest part collecting sheet

43.2 Upper back rest part collecting sheet

44. Connection sheet

45. Connection component

46. Hanger

47. Welding hiding member

48. Connection bolt

49. Sitting part carrying profile

50. Sitting part

50.1 Middle sitting part

51. Sitting part connection member 52. Bolt

53. Motion limiting pin

54. Back rest connection hiding part

55. Armrest connection members

56. Fixing members

57. Foot connection hole

58. Fixing spindle

59 Wheels

60 Seat-spring member

61 Seat-moving member

62 Middle sitting part connection member

63 Adjustment member

64 Adjustment member arm

65 Spring connection member

66 Moving connection member

Detailed Description of the Invention

As shown in Figures 1 and 2, the sitting apparatus (30) in general; consists of a foot (34) of star shape containing wheels (59), a sitting part (33) located on the foot (34), a back rest part (32) connected to the sitting part (33) and where the sitting persons lean his/her back, head rest part (1) of adjustable height located on upper part of the back rest (32) for head resting of the sitting person, and arm rests (35) fixed to side parts of the sitting part (33) by means of arm rest connection members (23).

Back rest part (32) consists of two back rest parts (37) connected onto back rest carrying profile (36) in a manner enabling limited rotation motion. The connection between the back rest parts (37) and back rest carrying profile (36) is provided by means of connection members (40) allowing limited rotation motion. Preferably four back rest connection members (40) are used. Back rest connection members (40) are connected to the back rest parts (37) by means of bolts (41). Motion limiting pins (42) located on the back rest connection members (40) are used in order to limit the rotation motion on the back rest carrying profile (36) of the back rest parts (37). In addition, back resting parts (38) are located on the back resting parts (37) for back resting of the person. The number of back resting part (38) is four, which can be increased or decreased. Back resting parts (37) are interconnected by means of a sheet spring (43) through the connection points (39). Sheet spring (43) is of an elastic structure and when the person leans against the back rest parts (37), collective synchronous motion of the back rest parts (37) is provided. Thus back rest parts (37) provide ergonomy by means of synchronous motion fitting to back structure of the sitting person. Connection sheets (44) and connection members (45) which are preferably bolts are used for connection of sheet spring (43) onto connection points (39).

A hanger (46) is located at the rear part of the head resting part (31). The sitting person may hang his/her clothes such as coat, jacket etc. on to the hanger (46). Welding hiding members (47) fixed onto the back rest carrying profile (36) by means of connection bolts (48) are used in order to hide the welding points on the back rest carrying profile (36). As shown in figure 2, sitting part (33) consists of two sitting parts (50) connected onto the fixing spindles (26) located on the sitting part carrying profile (49) in a manner limited motion is allowed. The connection between the sitting parts (50) and fixing spindles (58) is made by means of four sitting part connection members (51) allowing limited motion of the sitting parts (50). Sitting part connection members (51) are fixed to the sitting parts (50) by means of bolts (52). Motion limiting pins (53) located on the sitting part connection members (51) provide limited rotation motion made by the sitting parts (50) on the fixing spindles (58). When the person sits on the sitting parts (50), the sitting parts (50) makes limited rotation motion around the fixing spindles (58) in a manner providing harmony with the body structure of the person. The synchronous motion made by sitting parts (18) together provides ergonomy. The foot (34) in the form of a star goes into a foot connection hole (57) in the lower part of the sitting part (33). Back rest connection hiding part (54) connected by means of fixing members (56) is used to hide the connection between the sitting part (33) and the back rest profile (36).

In order to understand the mechanism more clearly, the detailed view of the back rest part (32) of the sitting apparatus has been given in figure 3. Figure 4 shows a detailed lower perspective view of the sitting part (33) of the sitting apparatus. In a preferred embodiment of the invention, transparent garment coated onto the sitting and back rest parts (50, 37) provides contact of body of the sitting person with air and thus prevents sweating.

Figure 5 and Figure 6 show a front perspective and side views of the sitting apparatus consisting of four back rest parts (37) and two sitting parts (50) being subject of the invention. Sitting apparatus (30) in general, consists of a foot part

(34) containing wheels (59) at terminals, a sitting part (33) containing two sitting parts (50), arm rests (35) located on side parts of the sitting part (33) and providing arm rest for the sitting person, a back rest part (32) containing two lower back rest parts (37.1) connected onto the back rest carrying profile (36) in a manner allowing synchronous motion and two upper back rest parts (37.2) capable to conduct synchronous motion, located on the upper part of the lower back rest parts (37.1), a head rest part (31) located on the upper part of the back rest part (32), providing head rest for the sitting person and a hanger (46) located on rear part of the head rest part (31) provided for hanging the clothes such as jacket etc.

Figure 7 and 8 show front and rear perspective views of the sitting apparatus (30) respectively. As shown in figure 8, lower back rest parts (37.1) of the sitting apparatus (30) are connected onto the back rest carrying profile (36) by means of plastic connection members (19). Lower back rest parts (37.1) are interconnected by means of lower back rest part combining sheet (43.1) made of steel material having flexibility characteristic and thus may conduct synchronous motion. Thus the sitting person can lean against the lower back rest parts (37.1) ergonomically. Upper part of the lower back rest parts (37.1) contains two upper back rest parts (37.2) which are smaller when compared to lower back rest parts (37.1). Upper back rest parts (37.2) are also connected onto back rest carrying profile (37.1) by means of plastic connection members (19) in a manner enabling synchronous rotation motion together. Upper back rest parts (37.2) make synchronous movement of back part of the sitting person sitting on the sitting apparatus (30) with particularly upper part and thus provide increase of ergonomy.

Figure 9 and 10 show perspective views of the back rest part (32) of the sitting apparatus (30) in demounted position. As it can also be seen from the figures, connection points (39.1 , 39.2) have been provided on the lower and upper back rest parts (37.1 , 37.2). Plastic connection members (19) are connected to these connection points (39.1 , 39.2) by means of bolts (41) and thus connection of lower and upper back rest parts (37.1 , 37.2) onto back rest carrying profile (36) has been provided. Plastic connection members (19) are connected onto the back rest carrying profile (5.1) by means of motion limiting pins (42).

Lower back rest parts (37.1) and upper back rest parts (37.2) are interconnected on the connection points (39.1 , 39.2) by means of upper back rest part combining sheets (43.2). Upper back rest combining sheets (43.2) is of flexible structure and is made of steel material. Combining sheets (43.2) provide collective synchronous motion of upper back rest parts (37.2) in connection with lower back rest parts (37.1). Lower back rest part combining sheet (43.1) is connected to combining points (39.2) of the lower back rest parts (37.1) by means of bolts (41). Sitting part (33) consists of sitting parts (50) connected onto sitting part carrying profile (49) in a manner enabling synchronous motion. Sitting parts (50) are connected onto a connection spindle (58) connected to the carrying profile (49) by means of plastic connection members (19). Figure 11 is a front perspective view of the sitting apparatus (30) consisting of four back rest and three sitting parts being subject of the invention in mounted position. Figure 12 shows upper two dimensioned view of sitting apparatus (30) of the invention while figure 13 shows lower perspective view of the sitting apparatus (30) being subject of the invention. The sitting apparatus (30) in general, consists of a foot (34) of star shape containing wheels (59), a sitting part (33) located on the foot (34), a back rest part (32) connected to the sitting part (33) and where the sitting persons lean his/her back, head rest part (30) of adjustable height located on upper part of the back rest (32) and for head resting of the sitting person, and arm rests (35) fixed to side parts of the sitting part (33) by means of arm rest profile (35.1) and armrest profile connection (35.2). It contains resting parts (5.3) providing comfort when the person leans his/her back. Here, for illustrative purposes, the number of back resting part (5.3) is four, which can be increased or decreased.

Figure 14 shows Detail A perspective view of the sitting part (33) of the sitting apparatus being subject of the invention. Differently from the embodiment described above, medium seat part (50.1) is located on the seat profile (49) other than right and left seat parts (50). It is the spring member (60) which provides up and down spring movement of the said medium seat part (50.1) and it is the moving member (61) which provides right-left movement. The said spring member (60) is connected to the spring connection member (65). It is the seat profile connection members (51) which provide mounting of the said seat parts (50) on the seat profile (49). It is the medium seat connection members (62) which provide connection of the medium seat part (50.1) located on the middle part of the seat parts (50) located on right and left over the seat profile (49). Adjustment member (63) is located on lower part of the said seat profile (49). The adjustment member arms (64) are located on the said adjustment member (63). The said adjustment member arms (64) provide up and down movement of the seat. It is the armrest profile (65.1) and armrest profile connection (35.2) which provide connection of seat profile (49) and armrest (35). It is the moving connection member (66) which provides connection between the said moving member (61) and the seat profile (49).

The foot (34) of star shape is located in lower part of the seat profile (33). Figure 13 shows lower perspective view of the sitting apparatus (30) being subject of the invention. Figure 14 shows Detail A perspective view of the sitting part (33) of the sitting apparatus (30) being subject of the invention.

The invention cannot be limited to the illustrative embodiments given under this section. Alternative embodiments that can be developed by persons skilled in the related art on basis of basic factors covered under scope of protections indicated under claims and in the light of the above mentioned alternative embodiments shall mean violation of the invention.