KR102527958B1 - A chair with a backrest to which a self-tilting intermittent structure is applied - Google Patents

Abstract

The present invention relates to a backrest chair, and more particularly, a backrest body is pivotally fastened to a backrest post fastened to one side of a lower part of a seat plate of a backrest chair, and an elastic block is inserted on both sides between the backrest post and the backrest body, Between the pivot fastening part and the elastic block, by combining the lifting lever exposed on both sides of the backrest body and the fitting block embedded in the backrest body to be coupled with the lifting lever,
In addition to the entire tilting action of the backrest chair, the backrest itself is partially tilted, so that even when the backrest is fixed, the self-tilting action improves not only efficient buffering action but also comfort and comfort. Both sides The elastic block has excellent compressive strain by pressing, so that the backrest is tilted and twisted according to the direction of the load by the user, leading to a more natural posture and seating shape. Since locking or unlocking can be done easily, the convenience of use is also very outstanding.

Description

A chair with a backrest to which a self-tilting intermittent structure is applied}

The present invention relates to a chair with a backrest, and more particularly, in various chairs with a backrest, such as a chair in which a backrest is tilted by a tilting device for a lower part of a chair seat, a tilting structure is applied to the backrest itself, as well as the self-tilting As the structure is configured to be easily and conveniently controlled at the user's discretion, even when the tilting of the entire backrest is locked, the backrest itself has a certain elasticity and cushion and is tilted or twisted, so that the convenience and comfort of using the chair is further improved. It is about.

In general, a chair includes a seat portion supporting the buttocks of the user, a backrest portion supporting the user's back which is positioned perpendicular to the seat portion and fixed to the rear surface of the seat portion, and is provided on the back portion or a separate support to protect the user's back. Includes a lumbar support that supports the lumbar spine, which is part of the

Furthermore, in order to comfortably support the user's back, a tilting apparatus capable of rotating the backrest in the forward and backward directions of the chair may be further provided at the lower end of the seat, and when such a tilting apparatus is further provided, the backrest The lower end is coupled to the tilting device. Therefore, since the upper part of the backrest rotates in the front and rear directions centering on the lower part, when the user stretches or leans back for rest, the backrest part rotates forward and backward accordingly to stably support the user's weight. can do.

The tilting device of such a back chair includes a seat plate supporting the user's femur and a back plate supporting the thoracic spine, as shown in Patent No. 10-0621073, and a tilting base connected to the legs is installed below the seat plate, so that the seat plate and the back plate are In the tilting chair, a lumbar vertebrae supporting a lumbar vertebrae is provided between the seat plate and the back plate, and a first hinge axis hinged to the front of the skeleton of the seat plate, and hinges at the rear of the skeleton of the seat plate and at the lower end of the skeleton of the back plate A coupled second hinge axis, a third hinge axis hinged to the front of the tilting base and the lower end of the skeleton of the lumbar vertebrae, and a fourth hinge axis hinged to the middle of the skeleton of the back plate and the middle of the skeleton of the lumbar vertebrae and a front link connecting the first hinge axis and the third hinge axis, a chair tilting device capable of enhancing the stretching effect of the lumbar spine of the human body and actively supporting the lumbar spine has been devised and registered.

In addition, as in Registered Utility Model No. 20-045065, the spring strength of the tanji means is reduced for easy assembly and cost reduction, the tilting and locking operation is smooth, the impact is mitigated during use, and the overall life is extended by less wear, The tilting means is installed on the bracket and the tilting frame at the rear end of the base frame to greatly reduce the error of the tilting angle and the locking angle, increase the number of friction rings coupled between the tilting plate and the tilting plate, but a plurality of friction balls in the friction ring A chair tilting device has been devised and registered so that the tilting and locking operations are smooth and the locking power is further improved by forming and increasing the friction coefficient.

Then, in the case of Registered Patent No. 10-1056745, it is related to a device in which a seat frame in which a seat plate is installed and a chair frame in which a back plate is installed are supported by a hinge shaft and operated by tilting, and the upper part of the chair frame at a predetermined interval Formed, fixed block having each coupling hole; a guide block interposed under the seat frame and located between the fixing blocks, and having a connecting groove and a fastening hole in a long direction; A seat tilting device for a chair, including a tilting means including an operation plate and a movable plate positioned between the guide blocks and rotatably interposed and operated by a lever, has been devised and registered.

In addition, in the case of Patent Registration No. 10-1179498, in a chair including a cushion part on which a user can be seated and a backrest part for supporting the user's back, one side of the cushion part and one side of the backrest part are connected to the cushion. A tilting part allowing the backrest part to be tilted with respect to a part, wherein one side of the tilting part is connected to the cushion part and the other side is connected to the backrest part so that the backrest part can be tilted with respect to the cushion part, A branch support having one side connected to the cushion part and the other side branched to support both side surfaces of the backrest part, one side coupled to both ends of the branched branch support, and the other side coupled to the backrest part Thus, a tilting chair including a tilting means enabling the backrest portion to be tilted with respect to the cushion portion has been devised and registered.

In this way, a chair having a conventional tilting backrest has a shape in which the entire backrest body is tilted in the rearward direction in the process of the user tilting the upper body back. This is a trend that is being improved.

However, the conventional chair with a backrest as described above has a simple operation structure in which the entire backrest body is tilted or fixed, so that it does not have a partial tilting or additional tilting action for the backrest body according to the user's convenience or purpose of use or shape. Therefore, in some cases, the user feels uncomfortable or has a problem in that the user's waist or lumbar region is overburdened.

That is, when the user tilts the upper body backward in the process of using the backrest in a tiltable state, the entire backrest is tilted in the rearward direction by an amount corresponding to the compression force of the set spring, depending on the user or the use environment According to this, if only a slight tilting is required, a suitable form of use cannot be achieved, and in the tilting locked state, that is, in a fixed state to the backrest, the backrest cannot move and has a fixed state, so that only the cushion of the backrest itself It makes you feel uncomfortable or comfortable.

In addition, in some cases, a chair with a backrest to which a fixed angle adjustment means for the backrest has been added has been devised. The action of alleviating or buffering the load by the body weight is still dependent only on the cushion of the backrest body itself.

Therefore, there is an additional demand for a partial tilting means to relieve the load caused by the user's weight, rather than the type in which the entire backrest body is tilted back with a relatively large angle like the conventional tilting device, and such a small width Since the tilting action provides a sense of comfort or cushioning in addition to the purpose of mitigating shock as described above, it is urgently required for existing chairs with a tilting action of the backrest.

Korean Registered Patent No. 10-0621073 (2006.08.30. Registration) Republic of Korea Registered Utility Model 20-0450655 (Registration on October 14, 2010) Korean Registered Patent No. 10-1056745 (2011.08.08. Registration) Korean Registered Patent No. 10-1179498 (2012.08.29. Registration)

The present invention has improved the above-mentioned problems, and the backrest body is pivotally fastened to the backrest post fastened to one side of the lower part of the seat plate of the chair back chair, and the elastic block is inserted on both sides between the backrest post and the backrest body, Between the pivot fastening part and the elastic block, by combining the lifting lever exposed on both sides of the backrest body and the fitting block embedded in the backrest body to be coupled with the lifting lever,

The backrest body to which the load acts is individually tilted from the backrest post by the elastic block, and the self-tilting of the backrest body is locked by the elevating lever that flows up and down from both sides of the backrest body and the fitting block inside the backrest body Alternatively, it is an object of the present invention to provide a chair having a backrest to which a self-tilting regulating structure is applied, characterized in that it is configured to be unlocked.

In order to achieve the object described above, the present invention provides a chair including a backrest portion located on the upper side of the leg portion and coupled in a vertical direction by a backrest post from one lower side of the seat portion portion, wherein the lower portion of the backrest portion is It is mutually fastened so as to be rotatable by a pivot shaft from the backrest post, and configured by combining and forming separately provided elastic blocks on both sides of the upper part of the backrest body,

Support protrusions having curved grooves protrude from both sides of the front surface of the backrest post to which the pivot shaft is coupled, and pivot protrusions having recessed curved surfaces protrude from both sides of the rear surface of the backrest body corresponding to the support protrusions, and the pivot shaft is a curved surface. The head is formed so that the pivot shaft is inserted into the through shaft insertion hole and the recessed curved surface groove formed on both sides from the front surface of the backrest body, and through the shaft insertion hole is inserted into the shaft coupling hole formed in the support protrusion of the backrest post. As the fastening nut is coupled to the pivot shaft, the backrest compresses the elastic block by a load and is configured to be elastically tilted from the pivot shaft coupling part.

In the present invention, in addition to the overall tilting action of the backrest chair, the backrest itself is partially tilted, so that even when the backrest is fixed, due to the predetermined self-tilting action, not only an efficient buffering action, but also comfort and comfort are further improved. The elastic blocks on both sides have excellent compressive strain by pressing, so that the backrest is tilted and twisted according to the direction of the load by the user, leading to a more natural posture and seating shape. Since locking or unlocking for tilting action can be easily performed, convenience in use is also very excellent.

1 is an overall perspective view of a back chair to which a self-tilting structure according to the present invention is applied;
2 is a perspective view of a separation between a backrest post and a backrest body in a backrest chair according to the present invention;
Figure 3 is an exploded perspective view of the pivot fastening between the backrest post and the backrest body in FIG.
Figure 4 is an exploded perspective view of the elastic block coupling between the backrest post and the backrest body in FIG.
5 is an exploded perspective view of a locking intermittent portion between a backrest post and a backrest body in FIG. 2;
6 is another separated perspective view of the locking intermittent portion between the backrest post and the backrest body in FIG. 2;
Figure 7 is a cross-sectional and overall view of the main part of the back chair according to the present invention
Figure 8 is an enlarged cross-sectional view of the main part of the back chair according to the present invention
Figure 9 is a sectional view of the main part of the back chair according to the present invention
10 is an explanatory view of the self-tilting action of the backrest body in the backrest chair according to the present invention;
11 is an explanatory diagram of regulation for self-tilting of the backrest body in the backrest chair according to the present invention;

Additional objects, features and advantages of the present invention may be more clearly understood from the following detailed description and accompanying drawings.

Prior to the detailed description of the present invention, the present invention may make various changes and may have various embodiments, and the examples described below and shown in the drawings are not intended to limit the present invention to specific embodiments. No, it should be understood to include all changes, equivalents or substitutes included in the spirit and scope of the present invention.

In addition, when a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but other components may exist in the middle. It should be understood that there is On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Then, terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

In addition, terms such as "...unit", "...unit", and "...module" described in the specification mean a unit that processes at least one function or operation, which is hardware, software, or hardware and It can be implemented as a combination of software.

In addition, in the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted. In describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall perspective view of a back chair to which a self-tilting structure according to the present invention is applied, FIG. 2 is a perspective view of a backrest post and a backrest body separated in a back chair according to the present invention, and FIG. 3 is a backrest post in FIG. Figure 4 is an exploded perspective view of the pivot fastening part between the backrest bodies, Fig. 4 is an exploded perspective view of the elastic block coupling part between the backrest post and the backrest body in Fig. 2, Figure 5 is the locking intermittent part between the backrest post and the backrest body in Fig. 2 Figure 6 is another separated perspective view of the locking intermittent between the backrest post and the backrest body in Figure 2, Figure 7 is a cross-sectional and overall view of the main part of the back chair according to the present invention, Figure 8 is a view according to the present invention Fig. 9 is an enlarged cross-sectional view of the main part of the chair with backrest according to the present invention.

As shown in the figure, in the back chair according to the present invention, the seat plate part 110 is located on the upper side of the leg part 100 as in the prior art, and is coupled in the vertical direction by the back post 120 from one side of the lower part of the seat plate part 110. The structure of the chair including the backrest 130 has been improved, and a locking device and a tilting device for the backrest post 120 may be additionally mounted on the bottom of the seat portion 110.

In such a chair with a backrest, both sides of the lower part of the backrest body 130 are rotatably coupled to each other by the pivot shafts 140 and 140' from the backrest post 120, and the upper part of the backrest body 130 Separate elastic blocks 150 and 150' are coupled to both sides, and the backrest 130 rotates in the rearward direction from the backrest post 120 by the pivot shafts 140 and 140'. As described above, when the backrest 130 is subjected to a load in the rear direction by the user's weight, the elastic blocks 150 and 150' are compressed to buffer the load and the backrest ( 130), and when the load is lost, the backrest 130, which is in a state of being tilted rearward by the restoring force of the elastic blocks 150 and 150', moves along the pivot shaft 140. (140 ') as the axis of rotation is reversely rotated forward, which is the original position.

Here, the mutual pivot coupling structure between the backrest post 120 and the backrest body 130 as described above has curved grooves 121 on both sides of the front surface of the backrest post 120 to which the pivot shafts 140 and 140' are coupled. A support protrusion 122 having a protrusion is formed, and a pivot protrusion 132 having a set curved surface 131 is protruded from both sides of the rear surface of the backrest 130 corresponding to the support protrusion 122 to form the set curved surface ( 131) is inserted into the curved groove 121, so that the rotational action of the backrest 130 can be achieved by interlocking on the curved surface.

In addition, the pivot shafts 140 and 140' form a curved head 141 at one end, and a through-shaft insertion hole 133 formed on both sides from the front surface of the backrest 130 and a recessed curved surface groove ( 134), the curved head 141 is in close contact with the seating curved surface groove 134, and the backrest 130 is rotatable assembly regardless of the pivot shafts 140 and 140'. have a structure.

In particular, a fastening nut 142 is inserted into the shaft coupling hole 123 formed in the support protrusion 122 of the backrest post 120 through the shaft insertion hole 133 to the pivot shafts 140 and 140'. As the coupling is formed, the backrest body 130 compresses the elastic blocks 150 and 150' when a load is applied to the backrest body 130 in a state of being coupled to the backrest post 120, and the pivot shaft 140 )(140') tilting action in the rear direction from the coupling part and automatic return to the front when the load is lost.

Here, the elastic blocks 150 and 150' have fastening holes 151 and 151' formed on both sides facing the backrest post 120 and the backrest body 130, and a separate assembly bolt 152 ( 152') is inserted from the outside of the backrest post 120 and the backrest body 130 and screwed into the fastening holes 151 and 151', so that the backrest is supported by the elastic blocks 150 and 150'. The post 120 and the backrest body 130 are connected and fixed to each other, and from the backrest post 120, which is a fixed body, the backrest body 130 self-tilts by the amount of compression deformation of the elastic blocks 150 and 150' it can be done

At this time, the elastic block 150 (150') is made of a soft elastic material such as rubber material or silicon, and the elastic block 150 (150') having the shape of a hexahedron has a plurality of buffer grooves facing from the outside to the inside. As shown in FIG. 10, as shown in FIG. As the buffer hole 154 is deformed and compressed, a tilting action can be performed on the backrest 130, and when the pressing force on the backrest 130 is lost, the compressed elastic blocks 150 and 150' are originally While being restored to the shape of the backrest 130, which was tilted to the rear, it serves to push the backrest body 130 forward and return it to its original position.

Therefore, the backrest body 130 applied to the backrest chair of the present invention has a tilting action using the backrest post 120 of the backrest chair itself and a tilting action of the backrest body 130 itself. In the case of using the post 120, the backrest 130 is tilted to a much wider width, and in addition to this original tilting action, a small amount of self-tilting by the elastic blocks 150 and 150' is added. The tilting width can be widened, and when a load is applied by adjusting the compressive force of the elastic blocks 150 and 150', the elastic blocks 150 and 150' are compressed in advance, and the In the state in which the primary tilting has been performed, when a continuous load is applied, it may be set so that the secondary tilting, which is the original tilting action by the backrest post 120, is performed, and if necessary, the original tilting action using the backrest post 120 Afterwards, it may be set so that a small amount of additional tilting by the elastic blocks 150 and 150' is additionally performed, which can be applied differently depending on the purpose or use type of the back chair or the taste of the consumer.

In addition, the tilting action of the backrest body 130 itself by the elastic blocks 150 and 150' can be applied to a general chair not equipped with an original tilting means using the backrest post 120, and the tilting means It is applicable even in a state of use in a locked state, and at this time, even in a locked state of a chair or tilting device equipped with a backrest body 130 having only a tilting action by compression of the elastic blocks 150 and 150' It will be possible to use the chair in a state in which tilting is possible.

Subsequently, in the present invention, a control means capable of locking or unlocking the tilting action of the backrest 130 itself by the elastic blocks 150 and 150' as described above may be additionally provided, and the backrest ( 130), on both sides of the rear surface, there are vertically movable fitting blocks 160 and 160', and on both sides of the backrest 130, lift levers coupled with the fitting blocks 160 and 160' (170) (170') are formed to protrude outward, but the lift levers (170) (170') are coupled to be lifted up and down from the side of the backrest body (130).

In particular, the backrest post 120 corresponding to a position where the lifting lever 170, 170' and the fitting block 160, 160' do not interfere with the tip of the fitting block 160, 160' in a lowered state. As the interference supports 124 are integrally protruded from both sides of the front surface of the ), as shown in FIG. 130 itself compresses the elastic blocks 150 and 150' so that tilting is achieved, and the lifting lever 170 and 170' rises so that the fitting block 160 and 160' is the backrest body. In a state where it is inserted between the 130 and the interference support 124, the fitting blocks 160, 160' and the interference support 124 come into contact with each other and interfere with each other, so that the backrest 130 does not self-tilt. A locked state is created.

That is, slot holes 135 are formed on both sides of the backrest 130 so that the lift levers 170 and 170' move up and down, and the fitting block 160 is formed on the rear surface of the backrest 130. ) (160'), guide ribs 136 are formed protruding, and guide grooves 161 into which the guide ribs 136 are inserted are formed on the front surfaces of the fitting blocks 160 and 160', and the fitting blocks 160 and 160' are formed. It is configured by forming a lever coupling hole 162 at the side of the block 160 (160') to allow the end of the lift lever 170 (170') to be inserted inwardly.

Accordingly, the ends of the lift levers 170 and 170' inserted into the slot hole 135 from the outside of the backrest body 130 are inserted into the lever coupling holes 162 of the fitting blocks 160 and 160', The fitting blocks 160, 160' and the lift levers 170, 170' are firmly coupled and fixed to each other by the assembly bolts 163 inserted from the outside of the fitting blocks 160, 160'. As configured, the fitting blocks 160 and 160' move up and down along the guide ribs 136 of the backrest 130 together with the up and down operation of the lift levers 170 and 170'. As it moves up and down, the tilting of the backrest 130 is locked or unlocked while being opposed to or separated from the aforementioned interference support 124.

At this time, on the outer side of the fitting block 160 (160'), a separate separation prevention plate 180 coupled to the backrest body 130 is formed by bolting, and the fitting block 160 (160') is formed. ) is configured to move up and down between the backrest body 130 and the separation prevention plate 180, and in the process of fixing the separation prevention plate 180 to the backrest body 130 with bolts, the separation prevention plate ( 180) is configured to press the fitting blocks 160, 160' gently so that the fitting blocks 160, 160' can flow up and down only in a state where artificial force is applied, which is It serves to prevent the lift levers 170 and 170' from being lowered arbitrarily or by their own weight, and at the same time to allow the fitting blocks 160 and 160' to move up and down to a stable and constant position. will do

In addition, as a means for preventing random movement of the lift levers 170, 170' or fitting blocks 160, 160', a separate spring, ball bullet, or locking device can be added in various ways. will be.

Accordingly, the backrest chair of the present invention is applicable to both a chair equipped with a tilting device at the lower part of the seat 110 or a chair without a tilting device, and the backrest 130 itself has a pivot shaft 140 ) 140 ') and the elastic blocks 150 and 150' to give a predetermined tilting action, so that more comfort and comfort can be obtained when seating, as well as the elevating levers located on both sides of the backrest body 130 ( By using 170 (170'), control of the tilting action using the elastic blocks 150 (150') can be made quickly and conveniently.

In addition, the elastic blocks 150 and 150' provided on both sides of the backrest 130 vary in compression amount according to the direction of the load, so that the weight of the user applied to the backrest 130 varies depending on the position of the user's weight. It shows a compressed form and is tilted as if the backrest 130 is twisted, so even when the body is twisted or rotated to pressurize or tilted to the side, the elastic load is effectively buffered, so the existing uniform tilting It is to induce the use of a chair in a more comfortable and comfortable state away from the action.

The embodiments described in this specification and the configurations shown in the drawings as described above are merely the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention, so various equivalents and modifications that can replace them It should be understood that there may be examples.

100: leg part
110: seat plate
120: backrest post 121: curved groove
122: support protrusion 123: shaft joint
124: interference support
130: backrest body 131: seating surface
132: pivot protrusion 133: shaft insertion hole
134: curved surface seating groove 135: slot ball
136: guide rib
140,140': pivot axis 141: curved head
142: fastening nut
150,150': elastic block 151,151': fastening hole
152,152': assembly bolt 153: buffer groove
154: buffer hole
160,160': fitting block 161: guide groove
162: lever coupling hole 163: assembly bolt
170,170': lift lever
180: departure prevention plate

Claims (6)

In a chair including a seat plate part 110 located on the upper side of the leg part 100 and a backrest body 130 coupled in a vertical direction by a backrest post 120 from one lower side of the seat plate part 110,
The lower part of the backrest body 130 is mutually fastened so as to be rotatable by the pivot shafts 140 and 140' from the backrest post 120, and elastic blocks 150 provided separately on both sides of the upper part of the backrest body 130. ) (150 ') is formed by combining,
Support protrusions 122 having curved grooves 121 are protruded from both sides of the front side of the backrest post 120 to which the pivot shafts 140 and 140' are coupled, and the backrest body corresponding to the support protrusions 122 On both sides of the rear surface of 130, a pivot protrusion 132 having a set curved surface 131 protrudes, and the pivot shafts 140 and 140' form a curved head 141 so that the backrest 130 The pivot shafts 140 and 140' are inserted into the through shaft insertion holes 133 and the recessed curved surface grooves 134 formed on both sides from the front side of the backrest post 120 through the shaft insertion holes 133. As the fastening nuts 142 are coupled to the pivot shafts 140 and 140' that are inserted through the shaft coupling holes 123 formed in the support protrusions 122 of the backrest 130 by the load A chair having a backrest body with a self-tilting regulating structure, characterized in that it is configured to compress the elastic blocks 150 and 150' and elastically tilt from the coupling part of the pivot shaft 140 and 140'.
According to claim 1,
The elastic blocks 150 and 150' have fastening holes 151 and 151' formed on both sides of the backrest post 120 and the backrest body 130, and the backrest post 120 and the backrest body 130 As the assembly bolts 152 and 152' are screwed into the fastening holes 151 and 151' from the outside, the backrest post 120 and the backrest body 130 are formed by the elastic blocks 150 and 150'. ) A chair having a backrest body with a self-tilting intermittent structure, characterized in that it is configured to be connected and fixed to each other.
According to claim 1,
The elastic block 150, 150' is made of a soft elastic material, and the elastic block 150, 150' has a plurality of buffer grooves 153 from the outer surface to the inside and the inner surface of the elastic block 150, 150'. A chair having a backrest to which a self-tilting regulating structure is applied, characterized in that it is configured to form a plurality of buffer holes 154 passing through.
According to claim 1,
Fitting blocks 160 and 160' capable of moving up and down are positioned on both sides of the rear surface of the backrest 130, and are coupled to the fitting blocks 160 and 160' on both sides of the backrest 130. One lift lever 170 (170') is formed to protrude outward,
In the state where the lift levers 170 and 170' and the fitting blocks 160 and 160' are lowered, the backrest post 120 corresponds to a position that does not interfere with the front end of the fitting blocks 160 and 160'. As the interference supports 124 are protruded from both sides of the front side, the lift levers 170, 170' and the fitting blocks 160, 160' are lowered, so that the backrest 130 self-tilts, In a state in which the lifting levers 170 and 170' are raised and the fitting blocks 160 and 160' are sandwiched between the backrest 130 and the interference support 124, the backrest 130 itself A chair having a backrest body with a self-tilting control structure, characterized in that it is configured so that tilting is not performed.
According to claim 4,
Slot holes 135 are formed on both sides of the backrest body 130 to allow the lift levers 170 and 170' to move up and down, and fitting blocks 160 and 160' are formed on the rear surface of the backrest body 130. A guide rib 136 is formed to protrude toward, and a guide groove 161 into which the guide rib 136 is inserted is formed on the front surface of the fitting block 160 (160'), and the fitting block 160 ( 160') is formed with a lever coupling hole 162 in which the ends of the lift levers 170 and 170' are inserted inwardly,
Ends of the lift levers 170 and 170' inserted into the slot holes 135 from the outside of the backrest body 130 are inserted into the lever coupling holes 162 of the fitting blocks 160 and 160' so as to be inserted into the fitting blocks 160 and 160'. The fitting block 160, 160' and the lift lever 170, 170' are mutually coupled and fixed by an assembly bolt 163 inserted through from the outside of the block 160, 160'. The fitting blocks 160 and 160' are configured to move up and down together with the lift levers 170 and 170' along the guide ribs 136 of the backrest body 130. A chair with an applied backrest.
According to claim 5,
On the outer side of the fitting blocks 160 and 160', a separation prevention plate 180 coupled to the backrest body 130 is formed by bolting, so that the fitting blocks 160 and 160' are attached to the backrest body 130. ) And a chair having a backrest body with a self-tilting control structure, characterized in that it is configured to be elevated up and down between the separation prevention plate 180.

Images