JP3085345U - Height adjustment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a height adjustment device for a backrest or an armrest, which can reduce the number of members, reduce the material and manufacturing cost by limiting the length of a supporting column, and stabilize the combination of members. Provided is a height adjusting device that is obtained and has less failure. SOLUTION: A support column having a height adjustment stop portion,
A height adjustment seat slidably provided on the support column. The height adjustment stop portion is formed by continuously forming a plurality of stop grooves obliquely, and the height adjustment seat forms a concave storage groove portion, and has a projection that stops in the corresponding stop groove. An integrally formed stop block and an elastic body are provided in the storage groove, and a locking groove is formed at a bottom end of the storage groove. When the part enters the stop groove of the support pillar and stops, and the corresponding protrusion projects further upward from the uppermost stop groove, it is locked in the lock groove of the storage groove for a while. The members are combined so that they are positioned and the height adjustment seat reaches the lower end of the groove formed in the support column.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a height adjusting device for adjusting a height for supporting a backrest or an armrest of a chair.

[0002]

[Prior art]

 Many height adjustment devices have been devised and commercialized to adjust the height of the backrest and armrests of the chair to the height required by the user. For example, a height adjusting device (10) shown in FIG. 1 is provided with a height adjusting seat (2) slidably provided on a plate-like support column (1). A stop block (21), an elastic body (22), and a stop plate (23) are provided between the support column (1) and the adjustment seat (2). A groove extending vertically is formed at the center of the support column, and a notch-like groove that is diagonally continuous is formed at one end of the groove, so that a plurality of stop grooves (111) and guide teeth are formed. Form (11). The corresponding stop plate (23) is a plate having a hole formed in an appropriate shape, and a locking groove (231) is formed at a lower end edge of the hole. At the lower end edge of the corresponding stop block (21), a stop projection (211) projecting toward the support column (1) is integrally formed, and is formed on the height adjustment seat (2) via the elastic body (24). It is provided to be able to move freely Further, in a state where the corresponding stop block (21) is inclined by the action of the elastic body (24), the stop projection (211) moves from the guide tooth (11) at an appropriate position of the support column (1) to the stop groove. (111), and stops in the locking groove (231) to support the adjustment seat (2) at a required height. Also, when the stop projection (211) of the stop block (21) moves further upward from the uppermost locking groove (231), the position between the stop plate (23) and the support post (1) is increased. The generated friction causes a delay action, and the locking projection (211) of the corresponding locking block (21) is locked in the locking groove (231) of the locking plate (23), thereby temporarily restricting the operation. Is done. When the adjustment seat (2) reaches the lower end of the groove extending vertically in the center of the support column (1) and is further lifted upward, the stop projection in the stop groove (231) of the stop plate (23). The restriction on the operation with respect to (211) is released, and it enters the stop groove (111) and supports the adjustment seat (2) at the required height.

[0003] However, the above-mentioned known height adjusting device has several problems as follows. 1. Since the number of members is large and the assembling process is complicated, the manufacturing cost is increased. 2. At the upper part of the oblique stop groove formed continuously with the support pillar and at the part below the lower end, the stop protrusion slides into the stop groove or stops. A length (necessary for the delay action due to frictional force) is required to separate from the groove. Therefore, a perfect continuous stop groove structure can be formed only when the length of the support column is longer than the distance at which the height can be adjusted. Therefore, material costs are wasted. 3. Since the number of members is large, when the members are assembled, the stability between the members is relatively reduced, and the height adjustment effect is likely to be affected. In some cases, the height cannot be adjusted, which is inconvenient for the user.

[0004]

[Problems to be solved by the invention]

 Accordingly, an object of the present invention is to provide a height adjusting device which can reduce the number of members and reduce the length of a support column to a necessary limit, thereby preventing waste of materials and reducing manufacturing costs.

[0005] Another object of the present invention is to provide a height adjusting device that can obtain favorable stability between members when the members are assembled, and can prevent the effect of the device from being reduced or lost. It is in.

[0006]

[Means for Solving the Problems]

 The inventor of the present invention has made intensive studies to solve the above-mentioned problems, and as a result, has formed a support column forming a height adjustment stop portion and a height adjustment seat slidably provided on the support column. We have reached the conclusion that the above problems can be solved by using these elements, and based on these findings, we have completed this invention.

That is, according to the present invention, there is provided a height adjusting device including a supporting column having a height adjusting stop portion and a height adjusting seat slidably provided on the supporting column. The height adjustment seat is formed by forming a plurality of stop grooves continuously and obliquely, and the height adjustment seat forms a concave storage groove portion, and is held in a stop groove formed in the support column. A locking block integrally formed with a locking projection to be formed, and an elastic body are provided in the storage groove, and a locking groove is formed at a bottom end of the storage groove. As a result, the stop block is inclined, and the stop protrusion enters the stop groove of the support pillar and stops, and the stop protrusion moves further upward from the top stop groove. When it moves, it is locked in the locking groove of the storage groove and positioned for a while, and the height adjustment seat is lower than the groove formed in the support column. Height adjusting device is provided which is characterized by comprising the member combination to reach the part.

Hereinafter, a specific description will be given. The height adjusting device according to the first aspect includes a supporting column having a height adjusting stopper, and a height adjusting seat slidably provided on the supporting column. The height-adjustment stop portion is formed by forming a plurality of stop grooves continuously and obliquely, and the height-adjustment seat forms a concave storage groove portion, and the stop groove formed on the support column. A locking block integrally formed with a locking protrusion that locks into the inside, and an elastic body are provided in the storage groove, and a locking groove is formed at a bottom end of the storage groove. The stop block is inclined by the action of the elastic body, the stop protrusion enters the stop groove of the support pillar and stops, and the stop protrusion is moved to the uppermost stop groove. When the member is further moved upward from above, the members are locked in the locking grooves of the storage grooves and positioned for a while, and the above members are combined so that the height adjustment seat reaches the low end of the groove formed in the support column.

According to a second aspect of the present invention, in the height adjusting device, a notch groove having a circular arc shape is further formed at a lower end edge of the locking groove according to the first aspect, and the lower end edge of the stop block is formed at the lower end edge of the stopper block. Forms a locking projection corresponding to the notch groove.

According to a third aspect of the present invention, in the height adjusting device, the storage groove of the height adjusting seat in the first aspect is formed with a vertical guide groove in an upper half portion. The block is integrally formed with a projection at a position corresponding to the guide groove, and the projection is slidably provided in the guide groove.

According to a fourth aspect of the present invention, there is provided a height adjusting device, wherein a corresponding rail portion and a concave groove are formed on respective contact surfaces of the support pillar and the height adjusting seat.

[0012]

[Embodiment of the invention]

 The height adjusting device according to the present invention is a height adjusting device for adjusting a height for supporting a backrest or an armrest of a chair, and includes a supporting column having a height adjusting retaining portion, and a supporting column. And a height adjustment seat slidably provided on the upper surface. In order to describe the structure and features of such a height adjusting device in detail, a specific embodiment will be described below with reference to the drawings.

[0013]

【Example】

 The height adjusting device (30) according to the present invention includes a support column (3) having a height adjustment stopper (31) as disclosed in FIGS. The height adjustment stopper (31) is formed by continuously forming a plurality of stopper grooves (311) obliquely. The height adjustment seat (4) forms a recessed storage groove (41), and integrally includes a stopper projection (421) that is retained in a stopper groove (311) formed in the support pillar (3). The retaining block (42) formed in the above is provided in the storage groove (41), and a locking groove (44) is formed at the bottom end of the storage groove (41). Further, an elastic body (43) is provided in the storage groove (41), and the stop block (42) is inclined by the action of the elastic body (43) so that the stop protrusion (421) is supported. It is made easy to enter into the stop groove (311) of the pillar (3). When the locking projection (421) locked in the locking groove (311) moves further upward from the uppermost locking groove (311), the locking block (42) is moved to the storage groove (41). And is temporarily positioned by being locked in the locking groove (44). Therefore, the height adjustment seat (4) reaches the lower end of the groove formed in the support column (3). In this state, the locking of the locking block (42) is released, the locking block (42) is released from the locking groove (44), and the height of the support can be adjusted by raising the adjustment seat (4) again.

As is apparent from the design of the above-mentioned members, the locking projection (421) of the locking block (42) in the present invention has the function of the elastic body (43) as disclosed in FIG. As a result, the support column (3) inclines and enters the stop groove (311) constituting the height adjustment stop section (31) of the support column (3) to be stopped. Therefore, a function of adjusting the supporting height by abutting on the support column (3) in the process of raising the adjustment seat (4) is obtained. When the locking projection (421) locked in the locking groove (311) moves further upward from the uppermost locking groove (311), the inclination angle of the corresponding locking block (42) changes, and the elasticity of the locking block (42) changes. It reaches the position where the sex body (43) is compressed. When the height adjustment seat (4) is further raised from this state, the bottom of the stop block (42) is locked in the locking groove (44) of the storage groove (41) and is temporarily positioned. Next, when the height adjustment seat (4) is lowered, the stop block (42) maintains the state of being locked in the locking groove (44) by the urging force of the elastic body (43).

Next, as shown in FIG. 4, when the height adjustment seat (4) reaches the lowest end position and is further pressed downward, the height adjustment seat (4) moves downward to stop. The block (42) separates from the locking groove (44), and is inclined by the urging force of the elastic body (43) to return to a state of being locked in the locking groove (311). From this state, the purpose of the height adjustment operation can be achieved again. Therefore, the device of the present invention has a very simple structure, not only reducing the manufacturing cost, but also shortening the assembling time and obtaining excellent stability between members.

As disclosed in FIGS. 6, 7 and 8, the locking groove (44) of the present invention locks the locking block (42) in order to obtain more preferable stability when the locking block (42) is locked. An arc-shaped notch (441) is further formed at the lower edge of the groove (44), and the locking projection corresponding to the notch (441) is formed at the lower edge of the stop block (42). (422) may be formed. In this case, the support column (3) may be of a type to be clamped like a well-known device, or may be of a separated type by assembling, neither of which has an effect on the implementation of the technology of the present invention. Therefore, they will not be described in detail. When actually applying the technology according to this invention, the choice should be made according to the situation.

According to the other embodiment described above, as shown in FIGS. 9 and 10, in the step in which the locking projection (422) of the stop block (42) enters the locking groove (44), It is locked in the notch groove (441).

Further, a vertical guide groove (46) is formed in the upper half of the storage groove (41) of the height adjustment seat (4), and the guide groove (46) is formed in the stop block (42). The projection pillar (423) may be integrally formed at a position corresponding to the above. The protruding column (23) is slidably provided in the guide groove (46), and restricts the operation of the stop block (42) when performing the vertical movement or the tilting movement of the stop block (42). The block (42) can be operated stably.

Further, the height adjusting device (30) according to the present invention includes a rail portion (32) and a concave groove (45) corresponding to the contact surface between the support column (3) and the height adjusting seat (4). By forming, the height adjustment seat (4) has stability when sliding, and a gap is generated in the contact surface as in the conventional technology, and shaking and misalignment occur, resulting in failure. Prevent cause.

The above description is a preferred embodiment of the present invention, and does not limit the scope of implementation of the present invention, but is a modification or change that can be made by those skilled in the art. Those that have the effect of (1) belong to the scope of the registered utility model of this invention.

[0021]

[Effect of the invention]

 The height adjustment device according to this invention can reduce the number of members, reduce the length of support columns to a minimum, prevent waste of material, reduce manufacturing costs, and reduce In this case, preferable stability is obtained, and the effect of preventing a reduction in the effect of the device and the occurrence of a cause of failure are provided.

[Brief description of the drawings]

FIG. 1 is an exploded view of a conventional height adjusting means.

FIG. 2 is an exploded view of the height adjusting means according to the present invention.

FIG. 3 is a perspective view of a state where the height adjusting means according to the present invention is assembled.

FIG. 4 is an explanatory view showing the operation of the members constituting the height adjusting means according to the present invention.

FIG. 5 is an explanatory view showing the operation of the members constituting the height adjusting means according to the present invention.

FIG. 6 shows a height adjusting unit according to another embodiment of the present invention.

FIG. 7 is a perspective view showing a state in which the adjusting means disclosed in FIG. 6 is assembled.

FIG. 8 is an exploded view of a height adjusting unit according to another embodiment of the present invention.

FIG. 9 is an exploded view showing a relationship between a height adjustment seat having a guide groove and a projection column and a stop block.

FIG. 10 is an explanatory view showing the operation of the abutment stop block in FIG. 9;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 support column 10 adjusting device 11 guide tooth 111 locking groove 2 adjusting seat 21 locking block 211 locking projection 22 elastic plate 23 locking plate 231 locking groove portion 24 elastic body 3 support column 30 adjusting device 31 adjusting locking portion 32 Rail 311 Stop groove 4 Adjustment seat 41 Storage groove 42 Stop block 421 Stop protrusion 422 Stop protrusion 423 Projection column 43 Elastic body 44 Stop groove 441 Cutout groove 45 Depression groove 46 Guide groove

Claims (4)

[Utility model registration claims] A supporting column having a height adjusting stop portion;
A height adjustment device comprising a height adjustment seat slidably provided on the support column, wherein the height adjustment stop portion is formed by continuously forming a plurality of stop grooves obliquely, The height adjustment seat forms a concave storage groove, and a locking block integrally formed with a locking projection that locks in a locking groove formed in the support pillar, and an elastic body are formed in the storage groove. A locking groove is formed at the bottom end of the storage groove, the locking block is inclined by the action of the elastic body, and the locking protrusion is provided in the locking groove of the support column. When it enters and stops, and the corresponding protrusion moves further upward from the uppermost stop groove, it is locked in the lock groove of the storage groove and positioned temporarily, and the height adjustment seat is supported. A height adjusting device comprising a combination of the above members so as to reach a lower end of the groove formed in the height adjusting device. 2. An arc-shaped notch is further formed at a lower edge of the locking groove, and a locking projection corresponding to the notch is formed at a lower edge of the stop block. The height adjusting device according to claim 1, wherein: 3. The storage groove portion of the height adjustment seat has a vertical guide groove formed in an upper half portion, and a projection pillar is integrally formed on the stop block at a position corresponding to the guide groove. 2. The height adjusting device according to claim 1, wherein the protruding pillar is slidably provided in the guide groove. 4. The height adjusting device according to claim 1, wherein a corresponding rail portion and a concave groove are formed on respective contact surfaces of the support pillar and the height adjustment seat. .