KR102673945B1 - Fixing apparatus for height regulation - Google Patents

Abstract

The present invention relates to a height adjustment fixing device in which an upper column having a plurality of adjustment holes is coupled to a lower column to which a plurality of adjustment holes are slidably coupled to fix the position of the upper column, which can be coupled to the lower column and coincides with the adjustment hole. A casing having a draw-out hole formed therein, a locking pin that can be pulled out from the inside of the casing and caught in the adjustment hole, a pull-in elastic member disposed in the casing and applying an elastic force so that the drawn-out locking pin can be pulled in, the casing A housing movably disposed inside the housing and overlapping a portion of the locking pin, a pull-out elastic member capable of applying an elastic force so that the locking pin is pulled out from the inside of the housing and cushioning and supporting it, and a pull-out elastic member disposed in the casing to support the locking pin. It includes a cam lever that can apply elastic force to move the device.

Description

Height adjustment fixture{FIXING APPARATUS FOR HEIGHT REGULATION}

The present invention relates to a height-adjustable fixture.

In general, the height of desks and chairs used in classrooms is fixed from the time of manufacture, so students with various body types are unable to use desks and chairs according to their body sizes.

In response to this problem, recently, products that can easily adjust the height of desks and chairs to suit the physical conditions of students have been proposed.

Figure 9 is a cross-sectional view schematically showing the structure of a conventional height adjustment device.

As shown in Figure 9, the upper pillar 12 and the lower pillar 13 of the telescopic structure are coupled to each other, and the length can be adjusted by adjusting the position of the upper pillar 12. A plurality of adjustment holes 12a are formed at intervals in the upper column 12, and a height adjustment fixture 200 is provided in the portion of the lower column 13 where a through hole 13b that can coincide with the adjustment hole 12a is formed. ) are combined.

The height adjustment fixture 200 includes a casing 2 mounted on the lower pillar 13 and a selected adjustment hole 12a that is movably coupled to the inside of the casing 2 and coincides with the through hole 13b. A locking pin (3) that can be inserted into the locking pin (3), a pull-out elastic member (6) that applies an elastic force so that the locking pin (3) leaves the adjustment hole (12a), and a hinge pin (8) rotatably coupled to the casing (2) and includes a cam lever (7) that presses the locking pin (3) to be inserted into the adjustment hole (12a).

As the cam lever (7) rotates based on the hinge pin (80), the cam portion (7a) of the cam lever (7) directly presses the locking pin (3). At this time, the cam lever (7) could be rotated only when it coincided with the adjustment hole (12a) through the through hole (13b) so that the locking pin (3) could move. Accordingly, in a state where the locking pin (3) and the adjustment hole (12a) did not match, the locking pin (3) could not move forward, so the cam lever (7) could not be operated. Therefore, there was the inconvenience of having to rotate the cam lever (7) after accurately aligning the locking pin (3) and the adjustment hole (12a).

In addition, the upper pillar (12) is inserted into the lower pillar (13) and the locking pin (3) is located inside the casing (2), so it is not visible and matches the locking pin (3) and the adjustment hole (12a). I had to do it.

Republic of Korea Patent No. 10-1286080 (2013.07.09.) Republic of Korea Utility Model Registration No. 20-0394565 (2005.08.26.)

The present invention provides a height adjustment fixing device that allows operation of a cam lever even if the adjustment hole of the upper pillar and the locking pin do not match.

The height adjustment fixing device according to an embodiment of the present invention is coupled to a lower column to which an upper column having a plurality of adjustment holes is slidably coupled to fix the position of the upper column, and can be coupled to the lower column and A casing having a draw-out hole that can match the adjustment hole, a locking pin that can be drawn out from the inside of the casing and caught in the adjustment hole, and a pull-in elasticity that applies an elastic force so that the lock pin disposed in the casing and pulled out is drawn in. A member, a housing movably disposed inside the casing and overlapping a portion of the locking pin, a pull-out elastic member capable of applying an elastic force to pull the locking pin out from the inside of the housing and cushioning and supporting it, and a pull-out elastic member on the casing It includes a cam lever that is disposed to apply elastic force to move the housing.

The locking pin may include a pin head located inside the housing and formed with a locking protrusion around the outer circumference of the pull-out elastic member, and a pin member that protrudes from the pin head and can be pulled out to the outside of the casing. You can.

The cam lever is rotatably coupled to the casing with a hinge pin and may include a cam body having a cam portion in contact with the housing, and a handle protruding from the cam body.

A cam protrusion that presses the housing may be formed on the cam portion.

The cam lever may further include a pressing piece protruding from the cam protrusion.

A pressure groove into which the pressure piece is inserted is formed in the housing, and the pressure piece and the periphery of the pressure groove may be in surface contact.

A seating groove in which the handle is seated may be formed in the casing when the pressing piece is inserted into the pressing groove.

When the pressing piece is inserted into the pressing groove and pressurizes the housing, the pull-out elastic member applies elastic force to the locking pin to pull it out. However, if the adjustment hole and the pull-out hole do not match, the locking pin is pulled out along the outer circumference of the upper pillar. Instead of being pulled out in contact with the housing, the pull-out elastic member is compressed and is inserted into the housing to cushion and support the locking pin.

According to an embodiment of the present invention, the cam lever can be operated even if the adjustment hole and the through hole do not match, thereby improving user convenience.

According to an embodiment of the present invention, the other surface of the housing is always maintained in contact with the cam portion due to the elastic force of the lead-in elastic member and the pull-out elastic member, so that malfunction does not occur between the cam lever and the housing, which has the effect of increasing user reliability. there is.

Figure 1 is a schematic diagram showing a desk to which a height-adjustable fixing device according to an embodiment of the present invention is applied.
Figure 2 is an exploded view of the height adjustment device of Figure 1.
Figure 3 is an enlarged view showing the casing of Figure 2.
Figure 4 is an enlarged view of a portion of Figure 2.
Figure 5 is a bottom perspective view showing the cam lever of Figure 4.
Figures 6 to 8 are schematic diagrams showing the operating state of the height adjustment fixture of Figure 1.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Throughout the specification, similar parts are given the same reference numerals.

Next, a height-adjustable fixing device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7.

Figure 1 is a schematic diagram showing a desk to which a height adjustment fixing device according to an embodiment of the present invention is applied, Figure 2 is an exploded view of the height adjustment device of Figure 1, Figure 3 is an enlarged view showing the casing of Figure 2, and Figure 4 is a partially enlarged view of Figure 2, and Figures 5 to 7 are schematic diagrams showing the operating state of the height adjustment fixture of Figure 1.

First, referring to Figure 1, the height adjustment fixing device 100 is installed on the legs supporting the top 11 of the desk 1 and fixes the legs whose length is adjusted. Here, the bridge consists of an upper pillar (12) and a lower pillar (13). The upper pillar 12 is inserted into the lower pillar 13 and can slide in the vertical direction. A plurality of adjustment holes 12a are formed in the upper pillar 12 at intervals along the upper and lower longitudinal directions. A height-adjustable fixing device 100 for fixing the upper pillar 12 is coupled to the lower pillar 13. When the adjustment hole (12a) matches the height adjustment fixing device 100 by the slide movement of the upper pillar (12), the upper pillar (12) is fixed.

Referring further to FIG. 2, the height adjustment fixing device 100 includes a casing 20 that can be coupled to the lower pillar 13, and a locking pin that can be pulled out from the inside of the casing 20 and caught in the adjustment hole 12a. (30), a retracting elastic member 40 that applies elastic force so that the drawn out locking pin 30 is retracted into the inside of the casing 20, is disposed inside the casing 20 and overlaps a portion of the locking pin 30 An elastic force is applied so that the housing 50 and the locking pin 30 are pulled out, and the pull-out elastic member 60 and the housing 50, which can cushion and support the locking pin 30, are joined to allow the locking pin 30 to be pulled out. It includes a cam lever (70), and the cam lever (70) can be operated even if the adjustment hole (12a) of the upper pillar (12) and the locking pin (30) do not match.

Here, a flat mounting surface 13a on which the casing 20 is mounted is formed around the outer circumference of the lower pillar 13. A through hole (13b) is formed on the mounting surface (13a) that can coincide with any one selected adjustment hole (12a).

Referring further to FIG. 3, the casing 20 has one surface formed as a flat surface and can be fixed in contact with the mounting surface 13a. An operating space 21 is formed inside the casing 20, and a seating groove 23 is formed on the lower surface. The seating groove 23 is separated from the operating space 21. The operating space 21 is open to the other side of the casing 20, and the seating groove 23 and the operating space 21 are connected to the other side of the casing 20. A draw-out hole (21a) is formed on one side of the casing (20) to connect the operating space (21) and the through-hole (13b). A pinhole 24 is formed along the width direction (X) of the casing 20 in an open portion of the operating space 21 on the other side of the casing 20. The pinhole 24 is connected to the operating space 21.

Referring further to FIG. 4, the housing 50 is movably disposed in the operating space 21. A pin groove 51 open on one side is formed inside the housing 50. A pressure groove 52 is formed on the other surface of the housing 50 along the first direction (X).

The locking pin 30 includes a pin head 31 and a pin member 32, and is disposed inside the casing 20. A portion of the locking pin 30 is pulled out of the casing 20 by an external force and is placed in the adjustment hole 12a. can be inserted.

The pin head 31 is located in the pin groove 51 and can move in a straight line. An insertion groove 312 open on one side is formed inside the pin head 31. A protruding locking protrusion 311 is formed on one outer circumference of the pin head 31. The locking protrusion 311 is formed along the circumferential direction. However, a plurality of locking protrusions 311 may be formed at intervals along the circumferential direction.

The pin member 32 has a preset length and its outer circumferential diameter is smaller than the outer circumferential diameter of the pin head 31. One side of the pin member 32 is located in the withdrawal hole 21a and the through hole 13b, and the other side is removably inserted into the insertion groove 312. However, the pin head 31 and the pin member 32 may be formed as one piece.

The pin head (31) and the pin member (32) forming the locking pin (30) can be moved together by external force, and at this time, the adjustment hole (12a) and the through hole (13b) on one side of the pin member (32) do not coincide. Otherwise, it can be in contact with the outer circumference of the upper pillar 12, and if the adjustment hole (12a) and the through hole (13b) match, it can be inserted into the adjustment hole (12a).

The pull-out elastic member 60 is located in the pin groove 51 and may include a coil spring. One end of the pull-out elastic member 60 is in contact with the locking protrusion 311, and the other end is in contact with the inner side of the pin groove 51. When an external force is applied to the housing 50, the pull-out elastic member 60 applies elastic force to the locking protrusion 311 so that the locking pin 30 is pulled out from the operating space 21. However, when the locking pin 30 is in contact with the outer circumference of the upper pillar 12, the pull-out elastic member 60 is compressed between the locking protrusion 311 and the inner side to elastically support the locking pin 30. When the adjustment hole 12a and the locking pin 30 are aligned in an elastically supported state, the locking pin 30 can be inserted into the adjustment hole 12a by the elastic force of the pull-out elastic member 60.

The lead-in elastic member 40 surrounds the outer circumference of the pin member 32 and may include a coil spring. One end of the lead-in elastic member 40 is in contact with one side of the operating space 21, and the other end is in contact with the pin head 31. The lead-in elastic member 40 may be compressed when the locking pin 30 is pulled out from the casing 20. When the external force applied to the housing 50 is removed, the locking pin 30 can be pulled out of the adjustment hole 12a and into the inside of the casing 20 due to the elastic force of the retracting elastic member 40.

The elastic modulus of the lead-in elastic member 40 is smaller than the elastic modulus of the lead-out elastic member 60. Accordingly, the lead-in elastic member 40 may be compressed by the external force applied by the lead-out elastic member 60 to the pin head 31.

Referring further to FIGS. 5 and 6, the cam lever 70 includes a cam body 71 and a handle 72 and is coupled to the casing 20 to apply an external force to the housing 50.

The cam body 71 is located on the other side of the casing 20 and is located in the opening of the operating space 21. A pin through hole (71a) matching the pin hole (24) is formed in the cam body (71). The cam body 71 is supported by a hinge pin 80 that penetrates the pin hole 24 and the pin through hole 71a. A gap is formed between the pin through hole (71a) and the hinge pin (80). The cam body 71 can rotate based on the hinge pin 80.

A curved cam portion 711 is formed on one side of the cam body 71 based on the center of the pinhole 24. The cam portion 711 is formed with a cam protrusion 712 that gradually protrudes based on the center of the pinhole 24. The other surface of the housing 50 is maintained in contact with the cam portion 711 by the elastic force of the lead-in elastic member 40 and the pull-out elastic member 60.

A pressure piece 712a is formed along the width direction of the cam body 71 on the portion of the cam protrusion 712 that protrudes furthest from the center of the pinhole 24. The pressure piece 712a is formed to protrude from the cam protrusion 712. The pressing piece 712a is formed in a shape corresponding to the pressing groove 52. The pressing piece 712a may be inserted into the pressing groove 52. When the press piece 712a is inserted into the press groove 52, the cam lever 70 is applying an external force to the housing 50, and at this time, the housing 50 and the cam lever 70 are in surface contact. The contact area is increased due to surface contact, so the cam lever 70 can stably press the housing 50. However, when the cam portion 711 is in contact with the housing 50 without pressing it, the curved surface of the cam portion 711 and the other surface of the housing 50 form line contact.

The handle 72 protrudes from the lower part of the other side of the cam body 71 in the direction in which the cam portion 711 protrudes. The handle 72 is formed with irregularities. A stopper 721 that can be in contact with the partition wall 22 dividing the operating space 21 and the seating groove 23 protrudes from one surface of the handle 72.

When the cam portion 711 is in line contact with the housing 50, the handle 72 has a structure that protrudes from the other side of the casing 20, and the pressing piece 712a is inserted into the pressing groove 52 to press the housing 50. When being pressed, it is located in the seating groove 23, and the stopper 721 can be maintained in contact with the partition wall 22.

Next, the operation of the height adjustment fixture described above will be described with reference to FIGS. 1 and 6 to 8.

First, referring to FIG. 6, the cam portion 711 and the housing 50 are in line contact, and the pressing piece 712a and the handle 72 are exposed to the outside of the casing 20. At this time, the cam portion 711 is in line contact with the housing 50 and no external force is applied to the housing 50. The pin member 32 is located in the through hole 13b by the elastic force of the lead-in elastic member 40, and the housing 50 is maintained in contact with the cam portion 711 by the elastic force of the pull-out elastic member 60. do. At this time, the upper pillar 12 can move freely.

Referring to FIG. 1, the top plate 11 of the desk 1 can be lifted to raise the position of the top plate 11 relative to the floor. At this time, the upper pillar 12 can be pulled out from the lower pillar 13. However, in order to lower the position of the top plate 11 of the desk 1, the top plate 11 can be pressed. At this time, the upper pillar 12 can be retracted into the lower pillar 13.

Referring to FIG. 7, when the handle 72 exposed on the casing 20 is pressed while the adjustment hole 12a is not aligned with the through hole 13b due to the movement of the upper pillar 12, the cam lever 70 Rotating based on the hinge pin 80, the cam portion 711 gradually pressurizes the housing 50 and moves it toward one side of the casing 20. When the handle 72 is located in the seating groove 23 and the stopper 721 is in contact with the partition wall 22, the cam lever 70 does not rotate based on the hinge pin 80.

With the handle 72 positioned in the seating groove 23, the pressing piece 712a is inserted into the pressing groove 52, and the cam lever 70 and the housing 50 are in surface contact.

Meanwhile, the moving housing 50 is moved by applying elastic force to the locking pin 30 through the pull-out elastic member 60. Since the adjustment hole (12a) does not coincide with the through hole (13b), the pin member (32) contacts the outer circumference of the upper pillar (12). The locking pin 30 does not move, and the pull-out elastic member 60 is compressed between the locking protrusion 311 and the inner surface of the pin groove 51 to elastically support the locking pin 30. The lead-in elastic member 40 is compressed between one surface of the operating space 21 of the pin head 31. The upper pillar 12 can move while the fin member 32 is in contact with the outer circumference of the upper pillar 12.

Referring to Figure 8, when the adjustment hole (12a) and the through hole (13b) coincide with the movement of the upper pillar (12), the locking pin (30) can be moved by the elastic force of the pull-out elastic member (60) and the adjustment hole ( It can be inserted into 12a) and get caught. The lead-in elastic member 40 is pressed and compressed by the pin head 31. As the pin member 32 is inserted into the adjustment hole 12a, the upper pillar 12 remains fixed to the lower pillar 13. Accordingly, the height position of the top plate 11 can be maintained in a set state.

Therefore, according to this embodiment, the cam lever 70 can be operated even if the adjustment hole 12a and the through hole 13b do not match, thereby improving user convenience.

For reference, in the above description and drawings, the height-adjustable fixing device of the present invention is described as being installed on a desk, but the application field of the height-adjusting fixing device of the present invention is not limited to this and generally includes a second member pulled out from the first member. It can be applied to any fixed structure.

Therefore, the scope of the present invention is not limited to application to a desk, but should be interpreted to mean that it applies to a structure composed of a first member and a second member whose length can be varied.

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 made by those skilled in the art using the basic concept of the present invention defined in the following claims are also possible. falls within the scope of rights.

1: desk 11: top table
12: Upper pillar 12a: Control hole
13: lower pillar 13a: mounting surface
13b: Through hole
100: Height adjustment fixture
20: Casing 21: Operating space
21a: withdrawal hole 22: partition wall
23: Seating groove 24: Pinhole
30: Locking pin 31: Pin head
311: Locking jaw 312: Insertion groove
32: pin member 40: retractable elastic member
50: Housing 51: Pin groove
52: Pressure groove 60: Pull-out elastic member
70: Cam lever 71: Cam body
71a: Pin through hole 711: Cam part
712: Cam protrusion 712a: Pressure piece
72: Handle 721: Stopper
80: Hinge pin

Claims (6)

An upper pillar having a plurality of adjustment holes is coupled to a sliding lower pillar to fix the position of the upper pillar,
A casing that can be coupled to the lower pillar and is formed with a draw-out hole that can coincide with the adjustment hole,
A locking pin that can be pulled out from the inside of the casing and caught in the adjustment hole,
a retraction elastic member disposed in the casing and applying an elastic force to retract the drawn out locking pin;
A housing movably disposed inside the casing and overlapping a portion of the locking pin,
A pull-out elastic member capable of applying an elastic force so that the locking pin is pulled out from the inside of the housing and cushioning and supporting it, and
A cam lever disposed on the casing and capable of applying elastic force to move the housing
Includes,
The cam lever is
A cam body rotatably coupled to the casing with a hinge pin and having a cam portion formed with a cam protrusion that presses the housing;
A handle protruding from the cam body and
Pressure piece protruding from the cam protrusion
Includes,
The housing is formed with a pressure groove into which the pressure piece is inserted, and the circumference of the pressure piece and the pressure groove are in surface contact.
Height-adjustable fixture. In paragraph 1:
The locking pin is
A pin head located inside the housing and having a locking protrusion on the outer circumference of the housing to which the pull-out elastic member catches, and
A pin member that protrudes from the pin head and can be drawn out of the casing.
containing
Height-adjustable fixture. delete delete In paragraph 1:
The casing is formed with a seating groove in which the handle is seated when the pressing piece is inserted into the pressing groove.
Height-adjustable fixture. In paragraph 1:
When the pressing piece is inserted into the pressing groove and pressurizes the housing, the pull-out elastic member applies elastic force to the locking pin to pull it out. However, if the adjustment hole and the pull-out hole do not match, the locking pin is pulled out along the outer circumference of the upper pillar. It is inserted into the interior of the housing without being pulled out in contact with the housing so that the pull-out elastic member is compressed to cushion and support the locking pin.
Height-adjustable fixture.

Images