KR102016648B1 - Armrest multi stage rotation and height controllig apparatus of a chair - Google Patents

Abstract

The present invention relates to an armrest multi-stage rotation and height control device for a chair. More specifically, the armrest multi-stage rotation and height control device for a chair reduces noise by minimizing horizontal shaking when the height of an armrest is controlled. Also, the armrest multi-stage rotation and height control device for a chair can operate an operating switch (push button, a push switch) used to control the height by small power. Also, the armrest multi-stage rotation and height control device for a chair can maintain resistance with excellent durability. The armrest multi-stage rotation and height control device for a chair prevents an installation position of the operating switch (push button, the push switch) used to control the height from being easily exposed in a transfer state or in a moving state which is not a seated state. So, the armrest multi-stage rotation and height control device for a chair can prevent the height of the armrest from being arbitrarily changed. The armrest multi-stage rotation and height control device for a chair can perform not only change to a horizontal rotation angle of the armrest but also the change to intervals between the left and right armrests by performing a rotation state of an upper end of the armrest at a second stage including an inclined layer.

Description

Armrest multi-stage rotation and height adjustment of the chair {ARMREST MULTI STAGE ROTATION AND HEIGHT CONTROLLIG APPARATUS OF A CHAIR}

The present invention relates to a multi-stage rotation and height adjustment device of the armrest of the chair, and more particularly, to reduce the noise by minimizing left / right fluctuations when adjusting the height of the armrest, and to adjust the height with a smaller force. The operating position of the operation switch (push button) used for height adjustment is not transported or moved, while enabling the operation of the operation switch (push button) used to be used, and also maintaining a durable grip resistance. The height of the armrest can be prevented from being randomly changed by making it difficult to be revealed at, while the rotational state of the upper part of the armrest can be implemented in two stages including the inclined end. Armrests also allow changes in the gap between the armrests To provide an adjusting device.

In general, chairs such as office chairs are provided with armrests that serve to comfortably support the user's arms when seated. However, because the physical conditions are different for each person, the chair's armrest height adjusting device that can adjust the height of the armrest according to the user's physical condition is installed in the high-end chair, and research on this is being conducted continuously. .

In particular, the armrest height adjusting device of the conventional chair developed by this study includes the following components.

1A and 1B, the armrest height adjusting device 10 of the conventional chair has a plate member 13 fixed to the seat plate 2, and a plate member fixed to the armrest 11. A bend located inside the hollow outer sheathing member 12 and an empty space between the sheathing member 12 and the plate-shaped member 13 so as to be inserted into the member 13 so as to be movable in the longitudinal direction. And a leaf spring member 15 provided between the switching member 14 and the sheathing member 12. In addition, a plurality of locking grooves 13a are formed in the plate member 13, and a locking protrusion 14a is disposed at one end of the switching member 14 so as to be caught in any one of the plurality of locking grooves 13a. It is formed, the other end of the switching member 14 is provided with a lever member (14b) for the user to pull, and the center of the switching member 14 is hinged to the exterior member 12 so that the lever principle is applied It is provided so that rotation is possible by 14c. In addition, the leaf spring 15 provides a restoring force to the switching member 14 so that the switching member 14 is in place.

Therefore, when the user pulls the lever member 14b, the switching member 14 is rotated counterclockwise with respect to the hinge axis 14c, so that the locking projection 14a is separated from the locking groove 13a. As a result, the height of the armrest 11 can be adjusted. In addition, when the user releases the lever member 14b after the height of the armrest 11 is located at the height desired by the user, the switching member 14 refers to the hinge shaft 14c by the restoring force of the leaf spring 15. As the clockwise rotation rotates clockwise, the locking projection 14a is caught by another corresponding locking groove 13a, and thus the position of the armrest 11 is fixed.

However, as the switching member 14 has a bent shape and rotates, a space capable of accommodating the bent shape switching member 14 is provided between the exterior member 13 and the plate-shaped member 12. A sufficient space for the switching member 14 to rotate together must be secured, which results in the exterior member 13 being loose in the plate-like member 12, thereby adjusting the height of the armrest 11. When the left / right oscillation is severe, noise may be generated or motion may be impaired. Further, when the exterior member 13 is loosely present in the plate member 12, the locking protrusion 14a of the switching member 14 may be caught. If the armrest 11 is loosened even when it is inserted into the groove 13a and is fixed, and a high load is applied to the armrest 11, a situation arises in which the locking projection 14a is separated from the locking groove 13a. ) Spontaneously down there There is a problem.

In addition, if the user pushes the armrest 11 downward while the lever member 14b is operated in order to lower the height of the armrest, the exterior member 13 and the plate member are not moved directly to the lever member 14b. The switching member 14 is in a state in which the switching member 14 cannot be locked between the 12, and the armrest 11 descends to the bottom at once, and conversely, the user once to the top during the operation of raising the height of the armrest. The problem of finding an appropriate position to climb on is not easy, and ultimately, the reliability of the product may be lowered.

In order to solve such a problem, in the present invention, the patent application No. 10-1466956, filed by the applicant of the present application, the fixing member 20 fixed to the chair as shown in FIGS. 2A and 2B. )Wow; A movable member (30) provided at the fixing member (20) to be movable in the longitudinal direction and having an armrest (31) coupled to the upper end thereof; And so that the movable member 30 in the longitudinally movable state or the movable member 30 is fixed to the set height of the fixing member 20 so that the height of the armrest 31 can be adjusted. In the armrest height adjustment device of the chair comprising a switching unit (40, 50) provided between the fixing member 20 and the movable member 30 to

The first sliding guide groove 25 in which the plurality of first locking grooves 25a are spaced in the longitudinal direction is provided inside the fixing member 20.

A second sliding guide groove 52 in which a second locking groove 70a is formed is provided in the movable member 30 which is provided to be slidably movable in the longitudinal direction along the outer surface of the fixing member 20,

A part protruding into one of the first locking grooves 25a of the plurality of first locking grooves 25a formed in the first sliding guide groove 25 of the fixing member 20 is inserted into the movable member 30. A spherical locking hole 70 to provide a locking action to prevent the sliding movement of the provided, and

The locking mechanism 70 is accommodated in the second locking groove 70a by the longitudinal movement of the second sliding guide groove 52 of the moving member 30 to allow the first sliding of the fixing member 20 to slide. Height of the armrest of the chair, characterized in that the switching unit is provided to be released from the first locking groove (25a) formed in the guide groove 25 to release the locking state to enable the sliding movement of the movable member (30) An adjustment device was provided.

And the switching unit,

The upper armrest connection portion 41 is coupled to the lower end of the armrest 31, the lower portion of the operation switch coupling end 42 is formed, the lower portion is provided with a sliding portion 43 having a hollow portion A slider 40;

It is fitted to the hollow portion of the first slider 40, the first operating inclined surface 51 is formed at the upper end, the second sliding guide groove 52 is formed at the center portion, the first slider 40 at the lower end A second slider (50) having an elastic spring (54) to be elastically supported at the lower end of the head; And

Transversely to apply longitudinal displacement to the first actuating inclined surface 51 to set the second slider 50 at two optional positions in the longitudinal direction within the hollow of the first slider 40. And a push button 60 having a second working inclined surface 61 moved in the direction, and

The latching holes 70 are installed to partially protrude to the outside of the sliding part 43 of the first slider 40 of the switching unit and are formed in the first sliding guide groove 25 of the fixing member 20. A part of the first locking groove 25a that protrudes into one of the first locking grooves 25a is inserted to provide a multi-stage locking action, and the push of the second slider 50 by the push button 60 As the latching hole 70 is accommodated in the second locking groove 70a as the longitudinal position moves in the hollow part of the first slider 40, the portion protruding outward of the sliding part 43 is formed. The structure which retracted from the 1 catching groove 25a, and was made to release | release the latched state was taken.

However, the push button 60 of the armrest height adjusting device having such an improved structure is exposed to the outside, and suddenly the armrest when the user accidentally presses the push button 60 when the user grabs the armrest and gets out of the chair. There is a problem that the user may be surprised or injured due to the height of the lower, and the operation direction of the push button 60 of the armrest height adjustment device changes the horizontal action force to a vertical displacement and moves it horizontally again. It is difficult to use the force transmitted to the push switch efficiently because the user has a structure to switch the multi-stage through whether or not the locking mechanism with the locking mechanism 70 has the possibility of inconvenience, and also provides a multi-stage locking action. A locking bottom exhibited by the hemispherical receiving structure between the locking hole 70 and the second locking groove 70a. Force has a problem that limits the size and the duration is longer lasting when the wear and deformation proceeds jams resistance decreases.

On the other hand, the illustrated armrest adjusting device is limited to the vertical displacement of the armrest, that is, the height adjustment function, even if the armrest rotating device provided separately from the lower plate to adjust the distance between the armrests There was an inconvenience to rely on the method of changing the fixed installation position.

The present invention is to solve the above problems of the prior art, the technical problem of the present invention is to minimize the left and right swing and noise during operation by minimizing the swing space inside the height adjustment structure of the armrest, It enables the operation of the operation switch (push button) used for height adjustment with less force, and improves the operation feeling so that height adjustment can be performed more easily and accurately, and abnormal operation state even when high load is applied to the armrest. Not only does the seating position of the operation switch (push button) used for height adjustment be improved, but also improves the reliability of the device that prevents the occurrence of pressure. Raises the armrest so that it does not show up easily during transport or movement To prevent this from being changed arbitrarily, the rotation state of the upper end of the armrest can be implemented in two stages including the inclined end, so that not only the change in the left and right rotation angles of the armrest but also the change in the distance between the left and right armrests can be realized. It is to provide an armrest adjusting device to enable.

In order to achieve the above object, the armrest multi-stage rotation and height adjustment device of the chair according to the present invention, the fixing member is fixed to the bottom of the chair; A movable member coupled to the longitudinal housing of the fixing member in a longitudinal direction to be slidably movable inside the locking end housing, and having a first armrest rotating arm rotatably coupled to the upper end of the armrest; And in order to adjust the height of the armrest, the movable member to be movable in the longitudinal direction or the movable member to be fixed at a set height in the longitudinal housing of the fixed member. In the armrest multi-stage rotation and height adjustment device of the chair comprising a switching unit provided between the housing and the moving member,

For multi-stage rotation control of the armrest,

A plurality of first rotating locking jaw is provided on the outer circumferential surface of the upper end of the moving member, the lower end of the armrest first rotating arm which is fitted to the outer peripheral surface of the upper end of the moving member is multi-stage fitted to the first rotating locking jaw 1 rotation locking end is provided to control the multi-stage rotation of the armrest first stage,

It is fitted to have a common center through hole in the upper end of the armrest first rotary arm which is inclined to have an upper end at a position offset laterally relative to the lower end of the armrest first rotating arm, and is set in the arc direction. A first rotary guide plate having two arcuate sliding grooves spaced apart from each other is installed, and is projected downward so as to be fitted into three distinct regions of the two arcuate sliding grooves of the first rotary guide plate to maintain a coupled state. An armrest bottom slider with a second locking end is provided, and

To adjust the height of the armrest,

Inside the longitudinal housing of the fixing member is provided a sliding guide in which a plurality of engaging holes are formed spaced in the longitudinal direction,

The slider support is inserted and installed along the installation groove formed in the longitudinal direction in the sliding guide, and is provided as a moving member which is arranged to be slidably movable in the longitudinal direction along the slider support (being touched by the spring '1236'). A latching piece formed by including an inclined guide protrusion engaged with the inclined guide groove provided in the lower end of the upper and lower sliders and a locking hole protruding in the lateral direction is disposed to penetrate the slider support in the transverse direction, and pressurizes and switches the upper end of the upper and lower sliders. The push center rod is installed to extend through the lower end of the armrest first rotary arm to the center portion, and when the push switch installed in the oblique direction at the center of the armrest first rotary arm is pressed, the push center rod descends to lower the upper and lower sliders. Press the upper part to It is installed to move, the downward movement displacement of the up and down slider causes the horizontal displacement of the engaging piece by the inclined guide projection in the state of being engaged with the inclined guide groove provided in the lower end of the upper and lower sliders, the locking by the horizontal displacement of the engaging piece A locking mouth protruding laterally on one side is slid up and down with respect to the sliding guide of the armrest first rotating arm and the upper and lower sliders coupled thereto by external force or self-weight removed from the locking hole of the sliding guide to pull the armrest upward. It provides a armrest multi-stage rotation and height adjustment device of the chair, characterized in that the switching unit is provided so that the locking state is released to enable movement.

According to the present invention, by minimizing the swing space inside the height adjustment structure of the armrest to reduce unnecessary left / right swing and noise during operation, the operation switch (push button) used for height adjustment with a smaller force It is possible to achieve the effect of improving the operation feeling so that height adjustment can be performed more easily and accurately, and also improves the reliability of the device to prevent abnormal operation state even when high load is applied to the armrest. Make it work.

In addition, it is possible to maintain durable grip resistance despite deformation of the material, and to prevent the installation position of the operation switch (push button) used for height adjustment from being easily revealed during transport or movement rather than sitting. The height of the armrest can be prevented from being changed arbitrarily, and the rotation state of the upper end of the armrest can be implemented in two stages including the inclined end, thereby achieving a change in the left and right rotation angle of the armrest, and expanding or reducing the width thereof. By making it possible to achieve the effect of improving the convenience.

Figure 1a is a perspective view showing the armrest provided with the armrest height adjustment device of a conventional general chair, Figure 1b is a longitudinal sectional view of the main portion.
FIG. 2A is a perspective view showing in two directions an armrest having an armrest height adjusting device of a chair according to the embodiment disclosed in Patent Registration No. 10-1466956, which is an improvement of the apparatus of FIGS. 1A and 1B. The guide groove and the guide protrusion are provided in the longitudinal direction on the side and the inner surface of the moving slider of the moving member, Figure 2b is an exploded perspective view showing the armrest height adjustment device of the chair according to an embodiment of the present invention. .
Figure 3 is a rear perspective view showing a state in which the armrest multi-stage rotation and height adjustment device of the chair according to an embodiment of the present invention is installed in the chair.
Figure 4 is a side view showing the armrest multi-stage rotation and height adjustment device of the chair according to an embodiment of the present invention.
Figure 5 is a bottom view showing the operating state of the armrest multi-stage rotation and height adjustment device of the chair according to an embodiment of the present invention.
6a to 6e are first to fifth exploded perspective views of the armrest multi-stage rotation and height adjustment device of the chair according to an embodiment of the present invention.
7A and 7B are AA cross-sectional views of the first stage in the multi-stage rotation operation state of the armrest multi-stage rotation and the height adjustment device of the chair according to the embodiment of the present invention.
7C and 7D are cross-sectional views taken along line BB of the first stage in a multi-stage rotational operation state of the armrest multi-stage rotation and height adjustment device of the chair according to an embodiment of the present invention.
8A and 8B are AA cross-sectional views of the second stage in the multi-stage rotation operation state of the armrest multi-stage rotation and the height adjustment device of the chair according to the embodiment of the present invention.
8C and 8D are cross-sectional views taken along line BB of the second stage in a multi-stage rotational operation state of the armrest multi-stage rotation and height adjustment device of the chair according to the embodiment of the present invention.
9A and 9B are AA cross-sectional views of the third stage of the armrest multi-stage rotation and height adjustment device of the chair according to an embodiment of the present invention.
9C and 9D are cross-sectional views taken along line BB of the third stage in a multi-stage rotational operation state of the armrest multi-stage rotation and height adjustment device of the chair according to the embodiment of the present invention.
10A and 10B are AA cross-sectional views of the fourth stage in the multi-stage rotation operation state of the armrest multi-stage rotation and the height adjustment device of the chair according to the embodiment of the present invention.
10C and 10D are cross-sectional views taken along line BB of the fourth stage in a multi-stage rotational operation state of the armrest multistage rotation and height adjustment device of the chair according to the embodiment of the present invention.
11A and 11B are AA cross-sectional views of a fifth stage in a multi-stage rotational operation state of the armrest multi-stage rotation and the height adjustment device of the chair according to the embodiment of the present invention.
11C and 11D are cross-sectional views taken along line BB of the fifth stage in a multi-stage rotational operation state of the armrest multistage rotation and height adjustment device of the chair according to the embodiment of the present invention.
12a to 12c is a view for explaining the height adjustment structure of the armrest in the armrest multi-stage rotation and height adjustment device of the chair according to an embodiment of the present invention, Figure 12b is a cross-sectional view taken along the line CT-CT of FIG. 12C is a cross-sectional view taken along the line CT1-CT1 in FIG. 12B.
13A to 13C are views of the structure as shown in FIGS. 12A to 12C and show a state in which the push switch is pressed to release the latch.
14A to 14C are slidably moved after the locking state is released through FIGS. 13A to 13C to increase the height of the armrest (pull up), and then press the switch again to release the restoring state to restore the locked state. It shows the state.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

Figure 3 is a view showing a state in which the armrest with the armrest multi-stage rotation and height adjustment device of the chair according to an embodiment of the present invention is installed in the chair, Figure 4 is a side view, Figure 5 shows an operating state Bottom view. 6A to 6E are exploded perspective views (first exploded perspective view to fifth exploded perspective view) of various parts of the armrest multi-stage rotation and height adjusting device of the chair according to the embodiment of the present invention.

Armrest multi-stage rotation and height adjustment device of the chair according to an embodiment of the present invention, a device for adjusting the rotation angle and height of the chair armrest, as shown in Figure 3 to 6d, the chair (bottom) A fixing member 1100 fixed to the cover member; The upper and lower armrest rotating arm 1310 is multi-stage rotationally coupled to the upper and lower sliding movement inside the locking end housing 1210 coupled to the longitudinal housing 1120 of the fixing member 1100 in the longitudinal direction. Moving members 1220 and 1232 that are possibly coupled; In order to adjust the height of the armrest 1400, the movable members 1220 and 1232 may be in a movable state in the longitudinal direction, or the movable members 1220 and 1232 may be longitudinal housings of the fixing member 1100. And switching units 1230 and 1240 provided between the longitudinal housing 1120 of the fixing member 1100 and the movable members 1220 and 1232 to be fixed at a set height within 1120. In the armrest multi-stage rotation and height adjustment device of the chair,

For multi-stage rotation control of the armrest,

A plurality of first rotation locking jaws 1222a are provided on the upper end outer circumferential surface 1222 of the slider support 1220 constituting the movable members 1220 and 1232, and the upper end outer circumferential surface 1222 of the movable members 1220 and 1232. Armrest multi-stage rotation is provided on both sides of the lower end (1302) of the armrest first rotary arm 1310 is fitted to the first rotation locking end (1302a) is multi-stage fitted to the first rotation locking jaw (1222a). 6D, a fourth exploded perspective view, and FIGS. 7A and 7B, 8A and 8B, 9A and 9B, 10A and 10B, 11A and 11B, respectively, are shown.

And a common center penetrating through the upper end of the armrest first rotating arm 1310 coupled to the upper end outer circumferential surface 1222 of the moving members 1220 and 1232 so as to have an upper end at a position offset laterally with respect to the lower end. A first rotation guide plate 1342 having two arc-shaped sliding grooves 1343a formed to be fitted to have a ball 1450 and spaced at a predetermined angle in an arc direction is installed, and the first rotation guide plate 1342 is provided. The armrest bottom slider 1440 is provided with a second rotary locking end 1443a which is inserted into three distinct regions of the two arcuate sliding grooves 1343a of the lower portion and protrudes downward to maintain the combined state (second). 6C, which is an exploded perspective view, and FIGS. 7C, 7D, 8C, 8D, 9C, and 9C, 10C, and 10D, 11C, and 11D, respectively, which are exploded perspective views.

7A and 7B, 8A and 8B, 9A and 9B, 10A and 10B, 11A and 11B are cross-sectional views illustrating an operating state for understanding the first rotation control RC1 of the armrest. Is illustrated through, and in the accompanying drawings FIGS. 7C and 7D, 8C and 8D, 9C and 9C, 10C and 10D, 11C and 11D to understand the second rotation control RC2. The operating state is illustrated through the cross section.

Referring first to the armrest rotation state ([Stage 1] state) shown in FIGS. 7A to 7D, this is shown in FIG. 7A which is a lower cross-sectional view along the AA line (lower part) of FIG. As described above, the neutral state in which the left and right rotation of the first rotation control RC1 of the armrest does not occur is generated. Neutral state (second rotation) where neither left or right rotation of the second rotation control RC2 of the armrest occurs, as shown in FIG. The locking end 1443a is fitted into the middle region of the three divided regions of the arcuate sliding groove 1343a to remain coupled), so that the resultant rotation of the final armrest is also neutral [Stage 1 ] To the state.

Referring next to the armrest rotation state ([Stage 2] state) shown in FIGS. 8A to 8D, this is the left rotation of the first rotation control RC1 of the armrest from the basic neutral state (see FIG. 8B: at the top). When the right rotation is generated, the first rotation locking end 1302a which is multi-stagely coupled to the first rotation locking jaw 1222a is rotated and moved. Here, as shown in FIG. 8C, which is a lower cross-sectional view along the BB line (upper part) of FIG. 4, and FIG. 8D, which is an upper cross-sectional view, the left and right rotations of the second rotation control RC2 of the armrest have not yet occurred. The rotation stop end 1443a is fitted into the middle region of the three divided regions of the arcuate sliding groove 1343a to remain engaged), so that the final rotational state of the armrest is shown in the drawing [Stage 2 ] To the state.

9A to 9D, the armrest rotation state [Stage 3] state shown in FIG. 9A to 9D shows a right rotation of the first rotation control RC1 of the armrest from the basic neutral state (refer to FIG. 9B: left rotation when viewed from the top). ) Is generated (a state in which the first rotation locking end 1302a, which is multi-stage fitted to the first rotation locking jaw 1222a, is rotated and moved). Here, as shown in FIG. 9C which is a lower cross section along the BB line (upper part) of FIG. 4, and FIG. 9D which is an upper cross section, the left-right rotation of the 2nd rotation control RC2 of an armrest has not yet occurred neutral state (2nd The rotation stop end 1443a is fitted into the middle region of the three divided regions of the arcuate sliding groove 1343a to remain engaged), so that the final rotational state of the armrest is shown in the drawing [Stage 3 ] To the state.

Looking at the armrest rotation state [Stage 4] shown in Figs. 10A to 10D, the first rotation of the armrest as shown in Fig. 10A and Fig. 10B, which is a downward cross-sectional view along the AA line (bottom) of Fig. 4, is shown. A neutral state in which the left and right rotation of the control RC1 does not occur, but the second rotation control RC2 of the armrest as shown in FIG. 10C which is a lower cross section along the BB line (upper part) of FIG. 4 and FIG. 10D which is an upper cross section. ), The left and right rotations are rotated in the left direction while the second rotation locking end 1443a is fitted into the left region (based on FIG. 10D) of the three divided regions of the arcuate sliding groove 1343a. , Rotated right when viewed from the top), so that the resulting rotational state of the armrest is in the [Stage 4] state shown in the drawing.

In addition, the armrest rotation state [Stage 5] shown in FIGS. 11A to 11D is a first view of the armrest as shown in FIG. 11A and a top cross-sectional view of FIG. In the neutral state in which the left and right rotation of the rotation control RC1 does not occur, the second rotation control of the armrest as shown in FIG. 10C which is a lower cross section along the BB line (upper part) of FIG. 4 and FIG. The right and left rotation of RC2) is rotated to the right in the state in which the second rotation locking end 1443a is fitted into and coupled to the right region (see FIG. 10D) among the three divided regions of the arcuate sliding groove 1343a (see FIG. 10D: However, when viewed from the top, the left side is rotated), so that the final state of rotation of the resulting armrest is in the [Stage 5] state shown in the drawing.

Since each of the three rotation modes (neutral, left rotation, right rotation) in the first rotation control RC1 and the second rotation control RC2 can be set independently, 4 Three additional modes are possible, so that a total of nine armrest rotation states can be implemented through the present invention, in particular when the first rotation control RC1 and the second rotation control RC2 are implemented in the same rotation direction. It is possible to considerably enlarge the rotational displacement angle range of the front end of the armrest, and when the first rotation control RC1 and the second rotation control RC2 are implemented in opposite rotation directions, the widths of the left and right armrests are adjusted. On the other hand, it can be implemented so that the angle change does not appear when viewed from the front of the chair. As described above, according to a preferred embodiment of the present invention to implement the rotation state of the upper end of the armrest independently in two stages including the inclined end as well as the change in the left and right rotation angle of the armrest between the left and right armrests It is also possible to implement a change in the interval of.

And according to a preferred embodiment of the present invention, for the height adjustment of the armrest, as illustrated in Figure 6e, a fifth exploded perspective view,

Inside the longitudinal housing 1120 of the fixing member 1100 is provided a sliding guide 1210 in which a plurality of engaging holes 1212 are longitudinally spaced apart (see FIG. 6E),

A slider support 1220 is inserted into the sliding guide 1210 along an installation groove formed in the longitudinal direction, and elastically vertically along the slider support 1220 (slider support 1220 and the upper and lower sliders 1232). ) Is inclined by the spring '1236' is installed between the inclined guide projection (1234a) and the lateral protrusion engaging with the inclined guide groove (1232a) provided in the lower end of the upper and lower slider (1232) which is slidably disposed. The engaging piece 1234 formed including the sphere 1234b is disposed to penetrate the slider support 1220 in the transverse direction, and the push center rod 1242 for pressurizing and switching the upper end of the upper and lower sliders 1232 is the armrest. Installed through the lower end portion 1302 of the first rotating arm 1310 (through the through guide '1241') to extend to the center portion, and the center of the armrest first rotating arm 1310 When the push switch 1243 installed in the inclined direction is pressed, the push center rod 1242 is installed to move downward by pressing the upper end of the upper and lower sliders 1232 while descending in the vertical direction. The downward movement displacement of) causes the horizontal displacement of the locking piece 1234 by the inclined guide protrusion 1234a which is engaged with the inclined guide groove 1232a provided at the lower end of the upper and lower sliders 1232. , The locking mouth 1234b protruding laterally to the locking piece 1234 by the horizontal displacement of the locking piece 1234 is removed from the locking hole 1212 of the sliding guide 1210, thereby removing the armrest 1410. The upward and downward sliding movement of the armrest first rotary arm 1310 and the upper and lower sliders 1232 with respect to the sliding guide 1210 coupled thereto by an external force or magnetic weight that is pulled upwards The armrest multi-stage rotation and height adjustment device of the chair, characterized in that the switching unit (1230, 1240) is provided to enable the locking state to be released.

The height adjustment structure of the armrest in the armrest multi-stage rotation and height adjustment device of the chair according to an embodiment of the present invention can be seen with reference to Figure 12a to 14c, Figure 12b is a CT-CT line of Figure 12a 12C is a cross-sectional view taken along the line CT1-CT1 of FIG. 12B, and FIGS. 13A to 13C are views of the structure as shown in FIGS. 12A to 12C, and show a state in which the push switch is pressed to release the engagement. When pressing the push switch 1243 installed in the oblique direction (not exposed to the outside) in the center portion of the first rotary arm 1310, the push center rod 1242 is lowered in the vertical direction and the upper end of the upper and lower sliders 1232 are It is pressed to move it downward, and the downward movement displacement of the up and down slider 1232 is fitted to the inclined guide grooves 1232a provided at the lower end of the up and down slider 1232 in an interlocking state. While pushing the inclined guide protrusion 1234a in a lean state, a horizontal displacement is caused to cause the locking piece 1234 to move in the horizontal direction (vertical displacement → horizontal displacement; direction change), and the horizontal direction of such a locking piece 1234 is performed. The locking mouth 1234b protruding laterally to the locking piece 1234 by the displacement in the direction is removed from the locking hole 1212 of the sliding guide 1210 (to be pulled out) to pull the armrest 1410 upward. When pressed or pressed, the armrest first rotary arm 1310 and the upper and lower sliders 1232 can be slidably moved up and down along the sliding guide 1210. Meanwhile, after the locking state is released through FIGS. 13A to 13C, the sliding center is moved to release the push switch again while the height of the armrest is increased (pulled upward). When it returns to the locked state while being restored by the restoring force, the state becomes in the state of FIGS. 14A to 14C and the height adjustment is completed. The installation position of the operation switch (push button, switch) used for height adjustment is prevented from being arbitrarily changed by preventing the armrest from being easily revealed during transport or movement, not when seated.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1220,1232: Moving member
1222: outer peripheral surface of the upper part
1222a: first rotating locking jaw
1310: Armrest first rotating arm
1302: bottom
1302a: first rotating end
1450: common center through hole
1341: first rotating guide plate
1343a: (two arcs) sliding groove
1443a: second rotating end
1210: sliding guide
1220: Slider Support
1232: vertical slider
1232a: slope guide groove
1234: jam
1234a: tilt guide turning
1234b: latch
1242: push center bar
1243: push switch

Claims (1)

A fixing member 1100 fixed to the chair; The upper and lower armrest rotating arm 1310 is multi-stage rotationally coupled to the upper and lower sliding movement inside the locking end housing 1210 coupled to the longitudinal housing 1120 of the fixing member 1100 in the longitudinal direction. Moving members 1220 and 1232 possibly coupled; In order to adjust the height of the armrest 1400, the movable members 1220 and 1232 may be in a movable state in the longitudinal direction, or the movable members 1220 and 1232 may be longitudinal housings of the fixing member 1100. And switching units 1230 and 1240 provided between the longitudinal housing 1120 of the fixing member 1100 and the movable members 1220 and 1232 to be fixed at a set height within 1120. In the armrest multi-stage rotation and height adjustment device of the chair,
For multi-stage rotation control of the armrest,
A plurality of first rotation locking jaws 1222a are provided on the upper end outer circumferential surface 1222 of the movable members 1220 and 1232, and the armrest agent is fitted to the upper end outer circumferential surface 1222 of the movable members 1220 and 1232. On both sides of the lower end portion 1302 of the first rotating arm 1310, a first rotating locking end 1302a, which is multi-stage fitted to the first rotating locking jaw 1222a, is provided to control the multi-stage rotation of the armrest first stage.
Common center through hole at the upper end of the armrest first rotating arm 1310 coupled to the upper outer peripheral surface 1222 of the movable members 1220 and 1232 to be inclined to have an upper end at a position offset laterally with respect to the lower end. A first rotation guide plate 1342 having two arcuate sliding grooves 1343a formed to be fitted to have a width of 1450 in the arc direction is installed, and the first rotation guide plate 1341 An armrest bottom slider 1440 is provided having a second rotational locking end 1443a that is projected downward to fit in three distinct regions of two arcuate sliding grooves 1343a and remain engaged, and
To adjust the height of the armrest,
In the interior of the longitudinal housing 1120 of the fixing member 1100 is provided a sliding guide 1210 in which a plurality of engaging holes 1212 are longitudinally spaced apart,
A slider support 1220 is inserted into the sliding guide 1210 along an installation groove formed in the longitudinal direction, and is slidably moved in the longitudinal direction along the slider support 1220 (by being touched by a spring '1236'). A locking piece 1234 is formed that includes an inclined guide protrusion 1234a engaged with the inclined guide groove 1232a provided at the lower end of the upper and lower sliders 1232 and a locking hole 1234b protruding in a lateral direction. A push center rod 1242 is disposed to penetrate the slider support 1220 in the lateral direction, and presses and switches the upper end of the upper and lower sliders 1232 through the lower end 1302 of the armrest first rotary arm 1310. It is installed so as to extend to the center portion, and when pressing the push switch 1243 installed in the oblique direction in the center of the armrest first rotary arm 1310, the pressing center rod 1242 is lowered It is installed to press the upper end of the upper and lower sliders 1232 to move downward, the downward movement displacement of the upper and lower sliders 1232 is inclined in engagement with the inclined guide grooves 1232a provided at the lower end of the upper and lower sliders 1232. The guide protrusion 1234a causes the horizontal displacement of the locking piece 1234, and the locking mouth 1234b protruding laterally to the locking piece 1234 by the horizontal displacement of the locking piece 1234 is the sliding. The sliding guide of the armrest first rotary arm 1310 and the upper and lower sliders 1232, which are detached from the engaging hole 1212 of the guide 1210 and coupled thereto by an external force or a weight that pulls the armrest 1410 upward. Armrest multi-stage rotation of the chair, characterized in that the switching unit (1230, 1240) is provided to release the locking state to enable the vertical sliding movement with respect to 1210 and Height adjustment device.

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