KR101104214B1 - apparatus for adjusting height for the back of chair - Google Patents

Abstract

The present invention relates to a back height adjustment device of the chair. Specifically, the fixing base 110 is fixed to the backrest and has a sliding groove formed with a plurality of locking jaws, a movable table 120 fixed to the back plate by sliding into the fixing table and the sliding groove according to the sliding of the mobile table. And a locking member 130 that is caught on a locking jaw of the first and second springs so that the locking member is caught by the locking jaw and the locking member is released. The locking adjustment means 140 for automatically adjusting stepwise adjustment is installed. According to this configuration, it is possible to adjust the height of the back plate step by step, the fixing and loosening is made automatically, there is an effect to reduce the components and volume, and to facilitate the manufacture and assembly.

Description

{Apparatus for adjusting height for the back of chair}

The present invention relates to a back height adjustment device of the chair.

In general, as the functions of the chair are diversified and advanced, many chairs are provided for use by adjusting the height of the armrests and the height of the back of the chair to be adjusted to the user's physique.

Korean Utility Model Registration No. 0275889 is disclosed as a conventional example of a chair height adjusting device for a chair. The conventional chair height adjustment device is installed on the vertical plate of the bracket connecting the seat plate and the back plate is provided with a locking fixing plate having an opening and closing means, the vertical plate of the bracket is installed so that the lifting plate can be elevated, the lifting plate In the center, a pair of bullet strips are elastically installed, and the bullet strips are selectively compressed and hung or expanded to be separated by a locking protrusion configured at the bottom so that the lifting plate is lifted and lifted. The height is adjusted by combining the height adjustment device along the groove processed in the steel frame.

By the way, in the conventional chair height adjustment device configured as described above, there is a problem that there are many component parts, many processing parts of the parts, and the play is severely shaken when the height is adjusted, and the function of the chair is diversified, advanced, convenient and simplified and It is required to be slim, but the height adjusting device must be assembled to the chair after assembling the bracket first, so the volume of the product is large and it is not easy to assemble, and it is difficult to attach and detach after assembly. There is a problem that is difficult.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to enable step-by-step adjustment when adjusting the height of the back plate, and the fixing and loosening is made automatically, reducing the components and volume, and easy to manufacture and assembly It is to provide a chair height adjustment device.

The chair height adjustment device of the chair according to the present invention is fixed to the backrest support and having a sliding groove formed with a plurality of locking jaws, a movable table fitted to the holding table and sliding and fixed to the back plate, according to the sliding of the movable table A locking member that is caught on the locking jaw of the sliding groove, and the movable member interacts with the first and second springs so that the locking member is caught by the locking jaw and releases the locking so that stepwise adjustment of the movable platform is performed. It is characterized in that the locking means for automatic adjustment is provided.

The locking adjustment means may include a transfer moving in the horizontal direction by receiving the elastic restoring force by the first spring, and a slider moving in the vertical direction by regulating the horizontal movement of the transfer by receiving the elastic restoring force by the second spring. do.

The horizontal surface of the transfer is formed with an asymmetrical first projection having a long inclined surface and a short inclined surface engaged with the end of the slider, and the end of the slider has an asymmetrical mountain with a long inclined surface and a short inclined surface engaged with the first projection. The second projection of is formed.

The depth of the locking step is smaller than the width of the long inclined surface of the first projection and the second projection.

The upper end of the sliding groove is formed with a locking release groove for releasing the locking of the locking member to move the movable table to the lower side, the lower end of the sliding groove to restore the locking of the locking member to move the movable stage upwards The engaging restoring groove is formed.

According to the height adjustment device of the chair according to the present invention, the step height adjustment is possible when the height of the back plate is adjusted, the fixing and loosening is made automatically, there is an effect of reducing the components and volume, and easy to manufacture and assembly.

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

Figure 1 is an exploded perspective view showing the back height adjustment device of the chair according to an embodiment of the present invention, Figure 2 is an assembled elevation of Figure 1, Figure 3 is an assembled state of the spring and the locking member and the locking adjustment means of Figure 1 Detailed view of the inside. As shown in the figure, the height adjustment device 100 includes a fixed base 110, a movable base 120 that is fitted into the fixed base 110 and slides, and a locking member 130 provided on the movable base 120; The locking adjustment means 140 is provided.

The locking adjusting means 140 installed on the movable table 120 interacts with the first and second springs 141 and 142 so that the locking member 130 is disposed on the locking jaw of the fixing member 110. It is designed to automatically adjust the stepwise adjustment of the movable table 120 by releasing the locking, and the transfer 143 moving in the horizontal direction by receiving the elastic restoring force by the first spring 141, and the first Receiving elastic restoring force by the two spring 142, the slider 144 to move in the vertical direction to regulate the horizontal movement of the transfer 143.

The fixing base 110 is fixed to a backrest not shown through the fixing hole 112 and has a sliding groove 111 formed with a plurality of locking jaws 111a along the longitudinal direction and has a bending steel cross section with a bending flange. . The sliding groove 111 is formed in the web of the fixed base 110 and the inner surface of the bent flange of the fixed base 110 forms a guide surface to which the movable table 120 is fitted.

The backrest (not shown) is fixed to the seat plate of the chair. An upper end of the sliding groove 111 is provided with a locking release groove 111b for releasing the locking of the locking member 130 so that the movable table 120 can move freely downward. At the lower end, a restoring restoring groove 111c is formed to restore the restraint of the latching member 130 so that the movable table 120 can be gradually moved upward.

The movable table 120 is in the form of a movable rail sliding into the interior of the fixed base 110, and is fixed to the back plate not shown through the fixing hole 122. A groove 121 having a horizontal groove 121a and a vertical groove 121b in which the locking adjustment means 140 is inserted is installed in the middle of the movable table 120. A long hole 121c is formed in the horizontal groove 121a so that the locking member 130 is inserted and moved horizontally.

The locking member 130 is inserted into the long hole 121c of the movable table 120 and inserted into a hole to be described later of the transfer 143 to be caught by the locking jaw 111a, and has a pin (or bolt) shape. have.

The transfer 143 is fitted into the horizontal groove 121a, and the rear end is installed to be pressed by the first spring 141. On the horizontal surface (bottom surface) of the transfer 143, an asymmetric mountain-shaped first projection 143a formed of an elongated inclined surface L1 and a short inclined surface S1 engaged with the end of the slider 144 is formed, and the transfer ( The end of the 143 is formed with a hole 143b into which the locking member 130 is fitted.

The slider 144 is fitted into the vertical groove 121b, and the rear end is installed to be pressed by the second spring 142, and the end of the slider 144 fits the first protrusion 143a. The asymmetrical mountain-shaped second projection 144a, which consists of a long inclined surface L2 and a short inclined surface S2, is formed. A groove 121d is formed on one side inner surface of the vertical groove 121a to restrict the vertical movement of the slider 144, and a groove 121d is inserted and guided on one side of the slider 144. 144b is formed.

The locking adjusting means 140 is covered by the cover 150 while the first and second springs 141 and 142, the transfer 143, and the slider 144 are seated in the groove 121. The means 140 is not released. The cover 150 has a long hole through which the end (part caught on the locking jaw) of the locking member 130 passes, and both ends of the cover 150 are bent to fit into the groove 121 to cover the cover 150. Is installed.

On the other hand, the depth D2 of the locking step 111a of the holder 110 is smaller than the width W2 of the long inclined surfaces L1 and L2 of the transfer 143 or the slider 144 ( 3).

The width W1 of the locking release groove 111b and the locking restoring recess 111c is a width at which the end (part caught on the locking jaw) of the locking member 130 is inserted and guided (see FIG. 2). . Further, the depth D1 from the locking release groove 111b to the bottom of the locking jaw 111a is larger than the width W2 of the inclined surfaces L1 and L2.

The chair height adjustment apparatus of the present invention configured as described above, in the initial state, as shown in Fig. 4 (a), the end of the locking member 130 in the locking step (111a) of the sliding groove 111 It stays jammed at the bottom.

And, as shown in (b) of FIG. 4, the first projection 143a of the transfer 143 in the state where the end of the locking member 130 is caught in the locking release groove 111b of the sliding groove 111. Is moved to the left to ride over the second protrusion 144a of the slider 144 is caught by the first protrusion 144a, so the movable table 120 can move freely downward.

In addition, as shown in FIG. 4C, when the end of the locking member 130 is caught by the locking restoring groove 111c of the sliding groove 111, the first protrusion 143a of the transfer 143 is closed. The moving table 120 is gradually moved upwards by moving to the right to move to the right beyond the second protrusion 144a of the slider 144 and to move to the right while being caught by the latching jaw 111a. You can move to.

Hereinafter, such an operation state will be described with reference to FIGS. 5A to 5E and 3. As shown in FIG. 3, the initial pressure is applied to the transfer 143 and the slider 144 by the first spring 141 and the second spring 142, and the end of the locking member 130 is connected to the sliding groove 111. In the state of being caught in the lowermost locking jaw, as shown in Figure 5a by raising the back plate (not shown) to raise the movable base 120, the end of the engaging member 130 is the sliding groove 111 of the fixing base 110 Ascending along) reaches a maximum height of the locking step 111a, the transfer 143 moves the distance D2 to the left. At this time, the first protrusion 143a of the transfer 143 presses the second protrusion 144a of the slider 144 downward, and the depth D2 of the latching jaw 111a of the inclined surface L1 and L2 is long. Since it is smaller than the width W2, the first protrusion 143a does not exceed the second protrusion 144a and the transfer 143 is moved to the right side by the restoring force of the first and second springs 141 and 142. Move to the next stop.

As shown in FIG. 5B, when the end of the locking member 130 is further raised in the state where the end of the locking member 130 is caught on the uppermost side of the locking step 111a of the sliding groove 111, the transfer 143 ) Moves the distance D1 to the left. At this time, the first protrusion 143a of the transfer 143 presses the second protrusion 144a of the slider 144 downward, and the depth (from the locking release groove 111b to the bottom of the locking step 111a) Since D1 is larger than the width W2 of the inclined surfaces L1 and L2, the first protrusion 143a of the transfer 143 moves to the left beyond the second protrusion 144a, and FIG. As shown in 5c, the slider 144 is raised by the restoring force of the second spring 142 (see FIG. 3) so that the second protrusion 144a walks on the first protrusion 143a and the transfer 143 is moved to the right. Do not let it. Therefore, the movable table 120 is in a state in which it can freely move downward.

And, as shown in Figure 5d, when the end of the locking member 130 is lowered to the sliding groove 111 to enter the locking recovery groove 111c, the transfer 143 is moved to the right to the first projection While 143a pushes down the second protrusion 144a of the slider 144 downward, the second protrusion 144a passes over, and as shown in FIG. 5E, the transfer 143 further increases as the movable table 120 rises. Since the state can be moved to the right, the movable table 120 is raised to maintain the initial state as shown in FIG.

By moving the back plate up and down by such an action to move the movable table 120 up and down can easily adjust the back of the chair according to the user's body.

The chair height adjustment device of the chair according to the present invention is designed on the basis of accurate values such as the left and right, up and down movement distance and angle of the locking jaw, spring constant of each part, and can be fixed and loosened when moving up and down with the minimum amount of parts. Because of its bulky size, it can be applied to various chairs and can be easily attached and detached.

1 is an exploded perspective view showing a height adjustment device of the chair according to the embodiment of the present invention;

2 is an assembled elevation view of FIG. 1;

Figure 3 is a detailed view showing the inside of the assembled state of the spring and the locking member and the locking adjustment means of Figure 1;

Figure 4 (a) to (c) is a height adjustment state of the back height adjustment device of the chair according to the present invention,

5a to 5e is a state diagram of the operation of the height adjustment device of the chair according to the present invention.

110: holder 111: sliding groove

120: moving table 130: locking member

140: locking means 141: first spring

142; 2nd spring 143: transfer

144: Slider 150: Cover

Claims (4)

A fixed base having a sliding groove fixed to the backrest and having a plurality of locking jaws formed therein, a movable table fixed to the back plate by sliding into the fixed base, and a locking member caught on the locking jaw of the sliding groove according to the sliding of the movable base; and, The moving table is provided with a locking adjusting means for automatically adjusting the stepwise adjustment of the moving table by releasing the locking while allowing the locking member to be caught on the locking jaw by interacting with the first spring and the second spring. The locking adjustment means includes a transfer moving in a horizontal direction by receiving the elastic restoring force by the first spring, and a slider moving in the vertical direction by regulating the horizontal movement of the transfer by receiving the elastic restoring force by the second spring. Back height adjustment device of the chair, characterized in that. delete The method according to claim 1, On the horizontal surface of the transfer is formed an asymmetrical mountain-shaped first projection consisting of a long inclined surface and a short inclined surface engaged with the end of the slider, And an asymmetrical mountain-shaped second projection having a long inclined surface and a short inclined surface engaged with the first projection at an end of the slider. The method according to claim 1, An upper end of the sliding groove is provided with a locking release groove for releasing the locking of the locking member so that the movable table can move freely downward. Back rest height adjustment device of the chair, characterized in that the lower end of the sliding groove is provided with a restoring groove for restoring the locking of the locking member to move the movable table in a stepwise upward direction.

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