KR20230093205A - Seat angle adjustment device of chair - Google Patents

Abstract

The present invention relates to a seat plate angle adjusting device for various chairs, and more particularly, includes a lower body coupled to upper portions of lower supports of various chairs and an upper body coupled to lower portions of seat plates of various chairs, respectively, so that the lower body and the upper body One side of the hinge is coupled to each other, and the other side of the lower body and the upper body are mutually locked/unlocked by a locking lever, and a spring-supported rotation support is hingedly formed inside the upper body to the upper body Due to the applied rotational force, the lower end of the rotation support is sequentially locked to the locking jaw of the lower body, so that the angle of the seat is adjusted step by step,
By adjusting the angle of the seat of various chairs, it is possible to obtain the best seat angle according to the user's type of use or purpose of use, and it is possible to adjust the angle step by step from the seat in a horizontal state, as well as easily return to the original horizontal state. It is very convenient to use because it can be made, it is very economical because productivity and durability are increased by a relatively simple configuration, and it is very efficient because it can be applied to existing general chairs or back chairs.

Description

Seat angle adjustment device for chair {Seat angle adjustment device of chair}

The present invention relates to a seat plate angle adjusting device for various chairs, and more particularly, as a separate angle adjusting device positioned between a lower support body and a seat plate of various chairs is provided, the seat plate is horizontal from the angle adjusting device. It is about a seat angle adjusting device that can be adjusted to various angles in the state of use, so that it can be changed and maintained at the best seat angle according to the type of use or purpose of use of the chair, or quickly returned to a horizontal state.

In general, a chair is composed of a seat plate and a lower support body located below the seat plate. The lower support body will be manufactured in various forms, such as a frame-shaped leg or a shaft fixture having a radial support with casters. In the case of a backrest chair used, a seatback portion supporting the user's buttocks, a backrest portion positioned perpendicular to the seatback portion and fixed to the rear surface of the seatback portion and supporting the user's back, and provided on the backrest portion or a separate support A lumbar support for supporting the lumbar spine, which is a part of the user's back, is included.

Furthermore, in the backrest chair as described above, 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 portion to comfortably support the user's back, and such a tilting apparatus If further provided, the lower end of the backrest 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.

In particular, by applying the angle adjustment structure for the seat board of chairs with various structures that have recently entered, it is an improved form to make various angle adjustments to the seat board in the process of using the chair for a long time or according to the use type or purpose of each user. chairs are being created.

That is, in the chair in which the angle of inclination of the seat plate and the mechanism is adjusted, as in Utility Model Registration No. 20-0465274, the seat plate for adjusting the angle of inclination includes a seat plate including a seat plate hinged to the mechanism; a base part disposed below the seat plate part and supporting the seat plate part; an eccentric cam disposed to support the base portion; and a round bar connected to the eccentric cam so as to rotate the eccentric cam, wherein the eccentric cam includes a round bar fixing hole through which the round bar can pass through and be fixed, and as the round bar rotates, the eccentric A chair in which the height of the base part and the inclination angle of the seat part can be changed by rotating the cam has been devised and registered.

Subsequently, as in Patent No. 10-1358007, a seat frame fastened to the seat plate of a chair to support the seat plate and having a first hinge hole and a support hole; a support shaft fastened to the support hole, moved along with the rotational movement of the seat frame, and elastically supported by a spring elastic body; a base frame including a second hinge hole hinged with the first hinge hole and a guide hole through which movement of the support shaft is guided; A support unit provided at a central portion and having an outer circumferential portion having a fitting hole coupled to an end portion of the support shaft exposed to the guide hole and elastically supported in contact with the guide hole by the spring elastic body and having different diameters; and a lever unit for rotating the direction of the support unit so that the position at which the support shaft is supported in the guide hole is changed.

In addition, as in the case of Registered Patent No. 10-1589156, a shaft hole is formed in the center on both sides, a coupling groove is formed on one side of the shaft hole on one side of the both sides, a guide portion is formed on one side of the coupling groove, and the other An upper case in which a fixing hole is formed on one side of the shaft hole, a lower case in which shaft holes are formed on both sides to correspond to the shaft holes of the upper case, and a coupling groove and a guide part are formed on one side of the shaft hole, and installed through each of the shaft holes of the case A fixed shaft, a rotating member provided rotatably toward the guide part of the lower case, coupled to the rotating member, and rotated according to the rotation range of the rotating member, but is seated in the coupling groove formed in each case or the guide part A device for adjusting the seat angle of a chair composed of a rod member guided by a bar has been devised and registered.

Then, as in Registered Patent No. 10-2222629, the seat installed on the chair is rotatable, and it is adjustable according to the chair user's preferred angle of the seat, so that the chair user straightens the waist when performing work, , A device for adjusting the seat angle of a chair has been devised and registered so that the angle of the seat board can be comfortably adjusted according to the posture of the chair user during rest, so that the lower body of the chair user can take a comfortable rest without slipping.

However, the existing chair seat angle adjusting device as described above has a very complex structure and does not have an efficient operating relationship, resulting in reduced productivity and high manufacturing costs, as well as structurally unstable and extremely short service life. is to have

In particular, it has problems such as not being able to adjust to various angles or not being able to quickly and stably return to the original horizontal state, and forcibly rotating support bolts to artificially adjust the angle. It is true that it is very insufficient in terms of load bearing capacity and convenience as well as inconvenience.

In addition, the seat angle adjusting device is located between the lower support of the chair and the seat, and the existing seat angle adjusting device cannot be applied to various existing chairs. The upper part of the device and the lower part of the seat plate are required, and for this reason, the front end of the lower support or the locking device and the seat plate must be developed and manufactured together in connection with the angle adjusting device, which requires high development costs and development time. Since both the seat and the locking device cannot be used, it is extremely uneconomical as well as very inefficient.

Republic of Korea registered utility model 20-0465274 (2013.02.04. Registration) Korean Registered Patent No. 10-1358007 (2014.01.27. Registration) Korean Registered Patent No. 10-1589156 (2016.01.21. Registration) Korean Registered Patent No. 10-2222629 (2021.02.25. Registration)

The present invention has improved the problems as described above, and has lower bodies coupled to the lower supports of various chairs and upper bodies coupled to the lower portions of the seat plates of various chairs, so that one side of the lower body and the upper body is hinged to each other The other side of the lower body and the upper body are mutually locked/unlocked by a locking lever, and a spring-supported rotation support is formed in a hinged manner inside the upper body due to the rotational force acting on the upper body. As the lower end of the rotation support is sequentially locked to the locking jaw of the lower body, step-by-step angle adjustment of the seat plate is performed.

It is highly efficient as it can be installed between various existing lower supports and the seat plate, and the angle of the seat plate can be easily and quickly adjusted, so the convenience of use is excellent. It is an object of the present invention to provide a seat angle adjusting device for a chair having a feature in which an easy return is possible.

The present invention for achieving the above object is provided with a lower body coupled to the upper portion of the lower support of the chair and an upper body coupled to the lower portion of the seat of the chair, and one side of the lower body and the upper body is connected to the hinge shaft pin to each other The lower body and the other side of the upper body are mutually locked/unlocked by a separate locking lever, and a rotation support whose front end is hinged to the upper body is inserted into the upper body to The battery globe is supported downward by a separately provided spring, and the upper part of the lower body is configured by forming a receiving groove portion in which a first and second engaging steps are sequentially formed so that the lower end of the rotation support is held on the bottom surface. As

In an unlocked state between the lower body and the upper body by the locking lever, the lower end of the rotation support is sequentially locked to the first and second engaging steps by the artificial upward rotational force acting on the upper body, and the upper body and the seat plate It is configured so that the angle can be adjusted.

The present invention is to obtain the best seat angle according to the user's use type or purpose of use by adjusting the angle of the seat board of various chairs, and can adjust the angle step by step from the seat board in a horizontal state, as well as easily adjust the original It is very convenient to use because it can be returned to a horizontal state, and it is very economical because productivity and durability are increased by a relatively simple configuration, and it is very efficient because it can be applied to existing general chairs or back chairs.

1 is an overall perspective view of a chair to which a seat angle adjusting device according to the present invention is applied;
Figure 2 is a lower perspective view of the seat plate equipped with a seat plate angle adjusting device according to the present invention
Figure 3 is a bottom perspective view of a state in which the seat angle adjusting device and the seat plate are separated according to the present invention
Figure 4 is an exploded perspective view in one direction from the top of the seat angle adjusting device according to the present invention
Figure 5 is an exploded perspective view from the other upper direction of the seat angle adjusting device according to the present invention
Figure 6 is an exploded perspective view from one direction on the lower side of the seat angle adjusting device according to the present invention
Figure 7 is an exploded perspective view from the other lower direction of the seat angle adjusting device according to the present invention
8 is a cross-sectional view of the overall coupling of the seat angle adjusting device according to the present invention
9 is an overall separated cross-sectional view of the seat angle adjusting device according to the present invention
Figure 10 is an enlarged perspective view of the rotation support of the seat angle adjusting device according to the present invention
11 is an exploded perspective view showing mutually coupled parts for the upper body and the rotation support of the seat angle adjusting device according to the present invention;
12 is a perspective view showing the locking lever coupling part of the seat angle adjusting device according to the present invention
13 is an enlarged perspective view of the locking lever of the seat angle adjusting device according to the present invention
14 is an enlarged perspective view of the one-way rotation guidance unit of the seat angle adjusting device according to the present invention
15 is an explanatory view of the operation of the one-way rotation guidance unit of the seat angle adjusting device according to the present invention.
16 is a horizontal state diagram and a cross-sectional enlarged view of the seat plate angle adjusting device according to the present invention
17 is a first-stage angle adjustment state diagram and a cross-sectional enlarged view by the seat angle adjusting device according to the present invention
18 is a two-stage angle adjustment state diagram and a cross-sectional enlarged view by the seat angle adjusting device according to the present invention
19 is a state diagram of the return state of the seat plate by the seat plate angle adjusting device 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 exploded perspective view of a chair to which a seat angle adjusting device according to the present invention is applied, FIG. 2 is a lower perspective view of a seat board equipped with a seat angle adjusting device according to the present invention, and FIG. 3 is a seat angle adjusting device according to the present invention. A bottom perspective view of a state in which the device and the seat are separated, Figure 4 is an exploded perspective view of the seat angle adjusting device according to the present invention in one direction from the top, Figure 5 is a perspective view of the seat angle adjusting device according to the present invention from the other direction, Figure 6 is an exploded perspective view of the seat angle adjusting device according to the present invention from one lower side, Figure 7 is an exploded perspective view from the other lower side of the seat angle adjusting device according to the present invention, Figure 8 is the seat angle adjusting device according to the present invention 9 is an overall combined cross-sectional view of the seat angle adjusting device according to the present invention.

As shown in the figure, the seat angle adjusting device according to the present invention includes a lower body 210 coupled to the upper portion of the lower support body 110 of the chair 100 and an upper body 220 coupled to the lower portion of the seat plate 120 of the chair 100. ), as described above, one side of the lower body 210 and the upper body 220 are coupled to each other by a hinge shaft pin 230, and the other side of the lower body 210 and the upper body 220 are separately It is configured to be mutually locked/unlocked by the locking lever 240 provided, and the lower body 210 is fixed together with the lower support body 110 of the chair 100, and the upper body 220 is the lower body 220. While being rotated by the hinge axis pin 230 from the body 210, the angle of the seat plate 120 is adjusted.

Here, the chair 100 as described above refers to a chair with a backrest or a chair without a backrest, and the chair with a backrest refers to a type in which the backrest body is tilted or fixed.

In particular, when the lower support 110 in the chair 100 as described above is a chair in which the backrest is tilted, a separate tilting device for adjusting the angle of the backrest can be mounted at the front end of the lower support 110 There will be, and support angles with casters will be formed in all directions at the bottom, and it will have a support shaft equipped with shock absorbers and the like.

Then, in the case of a chair with a non-tilting back or a chair without a back, the lower support 110 as described above has a support angle in the form of a simple frame or a support shaft equipped with a shock absorber and a support angle in all directions. A fixing plate made of a square metal body fixed to the bottom surface of the seat plate 120 may be provided at the front end of the lower support body 110 of a chair with a fixed backrest or without a backrest.

Therefore, as the lower body 210 as described above is fastened to a tilting device or a fixing plate located at the front end of the lower support body 110 of various chairs, a chair with a backrest tilting chair or a chair with a backrest or a chair without a backrest will all be able to be installed.

Subsequently, the rotation support 250 whose front end is hinged to the upper body 220 is inserted into the upper body 220 as described above, and the rotation support 250 is operated by a spring 260 provided separately. A receiving groove portion in which a first locking step 211 and a second locking step 212 are sequentially formed so that the lower body 210 is supported downward and the lower end of the rotation support 250 is held on the bottom surface of the lower body 210. (213) is formed.

Therefore, in the mutually unlocked state between the lower body 210 and the upper body 220 by the locking lever 240, the rotation support is caused by the artificial upward rotational force acting on the upper body 220 through the seat plate 120. While the lower end of the 250 is sequentially held by the first catching step 211 and the second catching step 212, the angle adjustment of the upper body 220 and the seat plate 120 can be made step by step.

That is, the upper body 220 is locked with respect to the lower body 210 by manipulating the locking lever 240 in the transverse direction in a state of sitting on the chair 100 equipped with the seat angle adjusting device of the present invention. After being released, when the user leans forward or intentionally presses the front side of the seat plate 120, the rear side of the upper body 220 is rotated upward with the hinge axis pin 230 as the rotation axis, and at the same time, the upper body As the rotation support 250 hinged to the inside of the 220 is sequentially locked to the first locking step 211 and the second locking step 212, step-by-step angle adjustment can be made, as described above Even if the user's load is applied, the seat plate 120 in the state where the angle is adjusted supports the load while the rotation support 250 is locked to the first catching step 211 or the second catching step 212 Since you are doing it, you can continuously use the seat 120 in an angle-adjusted state.

In addition, when the seat plate 120 in a horizontal state is to be converted or returned to a horizontal state after adjusting the angle step by step, the seat plate 120 is lifted in an upward rotation direction and then lowered. The lower end of 250 passes the first catching step 211 and the second catching step 212 and rotates in one direction while standing by at the rear of the first catching step 211, so the return to the horizontal state is made, At the same time that the seat plate 120 and the upper body 220 return to a horizontal state, the locking lever 240 automatically binds the lower body 210 and the upper body 220 to each other so that the mutually locked state is maintained will be.

Accordingly, the user can use the seat 120 in various angle adjustment states according to the purpose or type of use of the chair and, if necessary, quickly and efficiently return the inclined seat 120 horizontally. do.

[0031] To describe the configuration of the seat angle adjusting device of the present invention in more detail, on both sides of the lower end of the rotation support 250 as described above, one-way guide pins 252 ( 252'), and on both sides of the receiving groove 213 of the lower body 210, a one-way rotation guide groove 215, 215' having an elliptical track shape having a locking protrusion 214 in the middle portion By forming a one-way rotation guidance groove 215, 215', the lower end of the rotation support 250 is unidirectionally rotated by the one-way guide pins 252, 252' of the rotation support 250 inserted into the grooves 215, 215'. It is configured to be repeatedly rotated in one direction within the grooves 215 and 215'.

At this time, the one-way rotation guide grooves 215 and 215' are located below the locking protrusion 214 as shown in FIGS. 10 and 11, and the first locking step 211 and the second locking step ( 212), the first inclined step 215a and the second inclined step 215b formed at the corresponding positions are formed on the inner surface, and the first and second inclined steps 215a and 215b form an obstacle in a clockwise direction. A first retraction locking jaw 215c located on the inner surface corresponding to the upper side of one end of the jaw 214 and a second withdrawal locking jaw 215d located on the inner surface corresponding to the lower side of the other end of the locking jaw 214 ) as sequentially formed,

The horizontal state of the upper body 220 when the one-way guide pins 252 and 252' of the rotation support 250 as described above are located between the second retraction locking jaw 215d and the first inclined step 215a. At the same time, it interferes with the second retraction locking step 215d to prevent reverse rotation of the one-way guide pins 252 and 252', and the one-way guide pins 252 and 252' prevent the first locking step 211 ), it becomes a first-stage inclined state with respect to the upper body 220 and at the same time interferes with the first inclined step 215a to prevent reverse rotation, and the one-way guide pins 252 and 252' When it is locked on the hooking step 212, it becomes a two-step inclined state with respect to the upper body 220, and at the same time interferes with the second inclined step 215b to prevent reverse rotation, and the upper body 220 is in a two-step inclined state. When a continuous upward rotational force is applied from the one-way guide pins 252 and 252', the one-way guide pins 252 and 252' move from the lower side to the upper side along the locking jaw 214 of the one-way rotation guide grooves 215 and 215', and the locking jaw ( The one-way guide pins 252 and 252' moved upward of 214 are prevented from reverse rotation by interfering with the first retraction locking jaw 215c, and acting on the upper body 220 through the seat plate 120. Due to the downward pressing force, the one-way guide pins 252 and 252' pass through the second retraction locking step 215d and are located between the second retracting locking step 215d and the first inclined step 215a. Again, the seat plate 120 including the upper body 220 is configured to be in a horizontal state.

In particular, insertion grooves 253 are formed on both sides of the lower end of the rotation support 250 as shown in FIG. 12, and the spring 251 and the one-way guide pin 252 ( 252') is configured to be sequentially inserted, and a slot hole 254 is formed at the lower end of the rotation support 250 to pass through the insertion groove 253, and the one-way guide pins 252 and 252' The hooking protrusion 252a inserted into the slot hole 254 is formed on the surface of the slot, so that the hooking protrusion 252a inserted into the slot hole 254 flows within the transverse length range of the slot hole 254 As such, the one-way guide pins 252 and 252' are coupled to the rotation support 250 in an elastic state.

Therefore, the lower end of the rotation support 250 is held by the first catching step 211 and the second catching step 212 so that the angle adjustment of the upper body 220 and the seat plate 120 is performed step by step. The one-way guide pins 252 and 252' on both sides of the rotation support 250 are the first inclined step 215a, the second inclined step 215b, the first retraction locking step 215c and the second retract Preventing the rotation support 250 from moving in the reverse direction while sequentially passing through the locking jaw 215d, as well as inducing rotation in one direction along the track, the horizontal state with respect to the seat 120 and the first step It is to be able to repeat the angle adjustment, the second-stage angle adjustment, and the horizontal state again.

Then, on the inside of the lower surface of the upper body 220 as described above, as shown in FIG. 13, a plurality of elastic hooks 226 and 226' for hingedly coupling the rotation support 250 are formed to protrude downward, , At the upper end of the rotary support member 250, a plurality of hinge holes 256 and 256' corresponding to the hinge shaft portion 255 of circular cross section and the elastic hook 226 and 226' are formed to mutually hinge According to the configuration to be coupled, the rotation support 250 is in a state in which the downward rotational reaction force is continuously received by the aforementioned spring 260 in an assembled state in which free rotation is possible.

At this time, a vertical penetrating fastening hole 225 is formed in the upper body 220, and one end of the spring 260 is coupled and fixed to the fastening hole 225 from the lower side of the upper body 220, The spring 260 is made of a curved leaf spring, and once the upper side is formed with an incision locking hole 261 elastically inserted into the fastening hole 225, and the middle part of the spring 260 is the aforementioned rotating ring. The earth 250 penetrates the middle of the upper end of the earth 250 so as to be obliquely locked so that a continuous downward rotational force is provided to the rotation support 250 by the elastic force of the spring 260 .

In addition, a lever insertion part 222 having a lever insertion hole 221 is protruded from the outer surface of one side of the upper body 220 in the transverse direction as shown in FIG. 14, and a floating slot is formed in the middle of the lever insertion part 222 223 is formed, and the intermediate spring 241 and the locking lever 240 are sequentially inserted into the lever insertion hole 221 through the floating slot 223 in the middle of the locking lever 240. The locking bolt 242 is assembled to the portion so that the locking lever 240 can be moved in the transverse direction within the range of the transverse length of the flow slot 223.

Subsequently, a pair of locking grooves 243 and 243' are formed in the locking lever 240 as shown in FIG. The locking groove 243 is formed by protruding the locking jaw 244 having the locking groove 243 and 243' through the locking guide hole 224 and 224' formed inside one side of the upper body 220 corresponding to the locking groove 243 and 243'. (243') is exposed, and on the outer surface of the lower body 210, the locking protrusions 216 and 216' having a slip inclined surface 216a are protrudingly formed on one side of the upper portion, so that the locking protrusion 216 ( 216') is configured to lock the upper body 220 to the lower body 210 while being held on the locking jaw 244 of the locking lever 240 through the locking grooves 243 and 243'. .

The step-by-step operating state of the seat angle adjusting device of the present invention configured as described above will be described in more detail with reference to the accompanying drawings.

First, when the seat 120 of the chair 100 is in a horizontal state, as shown in FIG. 16, the lower end of the rotation support 250 is located on the first engaging step 211 of the lower body 210, and , The ends of the one-way guide pins 252 and 252' located on both sides of the lower end of the rotation support 250 are the first inclined step 215a and the second retraction locking step in the one-way rotation guide grooves 215 and 215'. It is located between (215d).

At this time, when a physical impact is applied to the rotation support 250 as described above to rotate upward, the one-way guide pins 252 and 252' having an outward resilient force by the built-in spring 251 Since the upper end is caught on the second retraction jaw 215d, the rotation of the rotation support 250 in the upward direction, that is, in the reverse direction, is suppressed.

When the user wants to adjust the angle from the horizontal state of the seat plate 120 to the inclined state in which the rear side of the seat plate 120 is lifted, the user presses the exposed lock lever 240 located on the rear side of the seat plate 120 to release the lock lever. After allowing the locking protrusions 216 and 216' of the lower body 210 to be separated from the locking grooves 243 and 243' of the 240, tilt the body forward or force the rear side of the seat 120 When lifted, the seat plate 120 and the upper body 220 rotate upward using the hinge axis pin 230 as a rotational axis, and the angle adjustment is performed.

Accordingly, while the rear side of the upper body 220 is lifted upward, the lower end of the rotation support 250, which is subjected to downward rotational force by the elastic force of the spring 260, passes the first engaging step 211 and interferes with each other. It is located in front of the first engaging step 211 while making a clicking sound by frictional force.

In addition, the one-way guide pins 252 and 252' located on both sides of the lower end of the rotation support 250 are temporarily compressed while moving toward the first inclined step 215a in the one-way rotation guide grooves 215 and 215'. Then, as soon as it passes the first inclined step 215a, it will be extended and locked in front of the first inclined step 214a, and by this mutual locking force, the rotation support 250 is the first locking step 211 ) and the first inclined step 215a, the lower end of the rotation support 250 is first caught even if the user's load acts on the seat plate 120, as well as reverse rotation is not performed. Since it is firmly locked on the step 211, the seat plate 120 can continuously maintain a stable one-step angle adjustment state.

Subsequently, in the case of forming a more inclined seat plate 120 from the angle adjustment state of the first step as described above, the user's body is tilted forward and the front side of the seat plate 120 is pressed using the user's body weight, so that the rear side rises. This is done by lifting the rear side of the seat plate 120 artificially. As the rear side of the seat plate 120 is lifted in this way, the rotation support 250 passes the second locking step 212 and also clicks. As shown in FIG. 18 while making a sound, the lower end of the rotation support 250 is locked in front of the second locking step 212, and in this state, even if a load acts on the seat plate 120, the second locking step ( Due to the rotation support 250 locked to 212, the seat plate 120 can continuously maintain the two-step angle adjustment state.

In addition, in the above two-step angle adjustment state, the ends of the one-way guide pins 252 and 252' coupled to both sides of the lower end of the rotation support 250 move toward the second inclined step 215b. It is temporarily compressed and then expanded the moment it passes the second inclined step 215b and is locked in front of the second inclined step 215b. It cannot move in the reverse direction due to the holding force of and the one-way guide pins 252 and 252' locked to the second inclined step 215b.

After the two-step angle adjustment is performed, the seat plate 120 is converted to a horizontal state, and as shown in FIG. When a downward load is continuously applied in the state, the lower end of the rotation support 250 rotates along the elliptical track of the one-way rotation guide grooves 215 and 251', returning to the horizontal state with respect to the seat plate 120 will be done

That is, when the rear side of the seat plate 120 is lifted in the second-step angle adjustment state for the seat plate 120, the lower end of the rotation support 250 is separated from the second locking step 212, and the rotation support ( 250) The one-way guide pins 252 and 252' at both ends move forward of the locking step 214 in the one-way rotation guide grooves 215 and 215' forming an elliptical track, and the locking step 214 It is induced and moved to the anterior upper side of the .

Then, as soon as the one-way guide pins 252 and 252' are locked to the inner upper part of the one-way rotation guide grooves 215 and 215', the rear side of the seat plate 120 will reach a state in which it can no longer rise. When the seat plate 120 cannot be raised any more, the user presses the rear side of the seat plate 120 downward this time in succession.

When the rear side of the seat plate 120 is pressed in this way, the one-way guide pins 252, 252' of the rotation support 250 move in the rearward direction along the track-shaped one-way rotation guide grooves 215, 215'. Since the one-way guide pins 252 and 252' have passed the first retraction locking jaw 215c in the one-way rotation guide grooves 215 and 215', the first retraction locking jaw 215c and Due to the interference of the movement in the reverse direction is not made, and eventually the lower end of the inclined rotation support 250 moves in the forward direction, and at the same time, the rear side of the seat plate 120 starts to descend. .

Therefore, as the rear side of the seat plate 120 is lowered, the one-way guide pins 252 and 252' of the rotation support 250 are the second retraction protrusions 215d in the one-way rotation guide grooves 215 and 215'. ) and is located between the first inclined step 215a, and at the same time, the locking jaw 244 in the locking groove 243, 243' of the locking lever 240 coupled to the upper body 220 The downward inclined surface 244a of the lower body 210 and the slip inclined surface 216a on the upper side of the locking protrusions 217 and 217 of the lower body 210 come into contact with each other, and the locking lever 240 is forcibly retreated by their inclined slip action. In the process of forcibly retracting the locking lever 240, the locking protrusions 216 and 216' are located on the upper part of the locking jaw 244 in the locking groove 243 and 243', and at the same time, the built-in elastic As the locking lever 240 moves forward by the reaction force of the spring 241, the locking protrusions 216 and 216' are automatically restrained.

Therefore, as described above, when the seat plate 120 is lifted and lowered again in the two-step angle control state, the one-way guide pins 252 and 252' of the built-in rotation support 250 induce one-way rotation in the form of a track. The seat plate 120 is returned to a horizontal state while moving along the grooves 215 and 215', and at the same time as the return to the horizontal state, the lower body 210 and the upper body are separated by the locking lever 240. By binding the 220 to each other in a locked state, the seat plate 120 can be fixed and maintained in a horizontal state.

In addition, when it is desired to adjust the seat plate 120 to an inclined state again from the horizontal state and locked state of the seat plate 120 as described above, the locking lever 240 is artificially pressed to prevent the locking protrusion of the lower body 210. After being separated from (216) (216'), it is possible to lift the rear side of the seat board 120 and operate it repeatedly and sequentially to adjust the angle in the first and second stages and in a horizontal state.

Accordingly, the angle adjusting device of the present invention repeats the horizontal state of the seat 120, the first-step angle adjustment and the second-step angle adjustment in a circular manner, and does not stop at the two-step angle adjustment as described above, but the above-mentioned jamming as necessary. By further pluralizing and subdividing the step, it will be possible to further diversify the angle to adjust the n-th step.

In addition, it is very easy to use and can be applied to all existing chairs of various structures and shapes, and has a simple structure and excellent manufacturability, creating a very economical and efficient feature.

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: chair
110: lower support
120: Seat
210: lower body 211: first catching step
212: second catching step 213: receiving groove
214: stumbling block 215,215': one-way rotation guidance groove
216,216': lock protrusion
220: upper body 211: lever insertion hole
222: lever insertion part 223: floating slot
224,224': lock guide hole 225: fastening hole
226,226': Elastic hanger
230: hinge shaft pin
240: lock lever 241: elastic spring
242: locking bolt 243,243': locking groove
244: lock jaw
250: rotation support 251: spring
252,252': one-way guide pin 253: insertion groove
254: slot hole 255: hinge axis
256,256': hinge ball
260: spring 261: incision lock

Claims (7)

A lower body 210 coupled to the upper portion of the lower support 110 of the chair 100 and an upper body 220 coupled to the lower portion of the seat 120 of the chair 100 are provided, respectively, and the lower body 210 and one side of the upper body 220 are coupled to each other by a hinge shaft pin 230, and the other side of the lower body 210 and the upper body 220 are mutually locked / unlocked by a lock lever 240 provided separately In the upper body 220, a rotation support 250 whose tip is hinged to the upper body 220 is inserted into the rotation support 250 by a spring 260 provided separately. It is supported downward, and on the upper part of the lower body 210, the first catching step 211 and the second catching step 212 are sequentially formed to hold the lower end of the rotation support 250 on the bottom surface. 213) is formed at the lower end of the rotation support 250 by the artificial upward rotational force acting on the upper body 220 in an unlocked state between the lower body 210 and the upper body 220 by the locking lever 240. In the seat plate angle adjusting device for a chair so that the angles of the upper body 220 and the seat plate 120 are adjusted while being sequentially engaged by the first and second locking steps 211 and 212,
One-way guide pins 252 and 252' supported outwardly by springs 251 are coupled to both sides of the lower end of the rotation support 250, and on both sides of the receiving groove 213 of the lower body 210, An elliptical one-way rotation guide groove 215, 215' having an engaging protrusion 214 is formed in the middle, and one-way guide pins 252, 252' inserted into the one-way rotation guide groove 215, 215'. ) Seat angle adjusting device for a chair, characterized in that the lower end of the rotation support 250 is configured to be repeatedly rotated in one direction within the one-way rotation guide grooves 215 and 215'. According to claim 1,
In the one-way rotation guidance grooves 215 and 215', a first inclined step 215a is located below the locking step 214 and is located at a position corresponding to the first locking step 211 and the second locking step 212. and a second inclined step (215b) for adjusting the seat angle for a chair. According to claim 2,
A first retraction locking step 215c is formed on the inner surface corresponding to the upper side of one end of the locking step 214 in a clockwise direction from the first and second inclined steps 215a and 215b, and the locking step 214 ) Seat board angle adjusting device for a chair, characterized in that a second retraction locking jaw (215d) is formed on the inner surface corresponding to the lower end of the other side of the chair. According to claim 1,
An insertion groove 253 is formed on both sides of the lower end of the rotation support 250 so that the spring 251 and the one-way guide pins 252 and 252' are sequentially inserted into the insertion groove 253, A slot hole 254 is formed at the lower end of the rotation support 250 to pass through the insertion groove 253, and is inserted into the slot hole 254 on the round surface of the one-way guide pins 252 and 252'. By forming a locking protrusion 252a, which is inserted into the slot hole 254, the one-way guide pins 252 and 252' with respect to the rotation support 250 are elastically flowing. Seat angle adjusting device for a chair, characterized in that configured so that the combination of. According to claim 1,
A plurality of resilient hooks 226 and 226' for hingedly coupling the rotation support 250 are formed on the inside of the bottom surface of the upper body 220 to protrude downward, and at the top of the rotation support 250 A seat plate for a chair, characterized in that it is configured to be hinged to each other by forming a plurality of hinge holes 256, 256' corresponding to the hinge shaft portion 255 of circular cross section and the elastic hanger 226, 226' angle adjuster. According to claim 1,
A lever insertion portion 222 having a lever insertion hole 221 protrudes from one side of the outer surface of the upper body 220, and a floating slot 223 is formed in the middle of the lever insertion portion 222, In the state in which the separately provided elastic spring 241 and the locking lever 240 are sequentially inserted into the lever insertion hole 221, the locking bolt 242 is inserted into the middle of the locking lever 240 through the floating slot 223. Assembled and configured to flow in the flow slot 223, a pair of locking grooves 243 and 243' are formed in the locking lever 240, and on one side of the locking groove 243 and 243' A locking protrusion 244 having a downward inclined surface 244a is protruded through the locking groove 243, 243' and the locking guide hole 224, 224' formed inside one side of the upper body 220 corresponding to the locking protrusion 244. The locking grooves 243 and 243' are exposed, and on the outer surface of the lower body 210, a locking protrusion 216 and 216' having a slip slope 216a is protruded and formed on one side of the upper part. The upper body 220 is locked to the lower body 210 while the locking protrusions 216 and 216' are held on the locking jaw 244 of the locking lever 240 through the locking grooves 243 and 243'. Seat angle adjusting device for a chair, characterized in that configured to be combined. According to claim 1,
A fastening hole 225 of vertical penetration is formed in the upper body 220, and one end of the spring 260 is coupled and fixed to the fastening hole 225 from the lower side of the upper body 220, and the spring ( 260) is made of a curved leaf spring, and at one end, an incision locking member 261 elastically inserted into the fastening hole 225 is formed on the upper side, and the aforementioned rotation support 250 is formed in the middle of the spring 260. Seat angle adjusting device for a chair, characterized in that the upper end of ) is inclinedly locked so that a continuous downward rotational force is provided to the rotation support 250 by the elastic force of the spring 260.

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