JP3128276U - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair provided with a lumbar support and capable of supporting a user's lumbar part without being leaned on a backrest and obtaining a preferable feeling of comfort in use.
A chair is provided with a waist support that can adjust an inclination angle on the back of the chair, the lower end of the waist support is extended downward, and the end of the waist is extended to the outer peripheral surface of one end. A horizontal shaft is formed with a screw thread and a hole is formed so that the threaded portion is hollow, and a support seat having ears at both ends is provided on the horizontal shaft. A fixing member is provided on each of the ears of the support seat, and a concave portion is formed in one of the fixing members at a position corresponding to one end of the horizontal shaft, and on the inner peripheral surface of the concave portion, on one end of the horizontal shaft. A movable block formed with a second thread corresponding to the formed first thread is provided, and an elastic body is provided between a hole at one end of the horizontal shaft and a concave part of the fixing member, and the fixing member In addition, a cover is provided from the outside, and an operation lever is provided on the cover on the side where the movable block is provided. It can be pivoted.
[Selection] Figure 1

Description

  The present invention relates to a chair, and more particularly to a structure of a chair provided with a lumbar support on a backrest.

  To date, chairs with different functions have been developed in the industry. The functions of these chairs were developed to meet the needs of different consumer groups, considering the place of use, the purpose of use, or other conditions, and the seats, backrests, armrests, etc. are also ergonomic It is designed in advance to meet the requirements. That is, it is possible to achieve an expected effect by a special design and to give the user a comfortable feeling in use.

  For example, Taiwan Utility Model Notification No. 573500 provides a chair configured to provide a support for supporting the waist at the backrest and to adjust the support. Taiwan Utility Model Publication No. 524084 provides a chair provided with a support for supporting the waist on the backrest. Both of these two utility models have a structure in which the back of the chair is improved and a support for supporting the waist is provided.

However, when the chair provided with the above-described waist support is seated shallowly so that the back does not contact the backrest, the waist support does not contact the user's body. That is, no effect is exhibited. A mechanism for adjusting the position of the lumbar support is provided, however, the lumbar support only moves up and down. That is, since only the height is adjusted, the expected effect cannot be obtained when the user sits shallowly.

References for utility models

Taiwan Utility Model Public Notice No. 573500, Taiwan Utility Model Public Notice No. 524084

It is an object of the present invention to provide a chair provided with a lumbar support, which can support a user's lumbar portion without being in a state of being leaned on a backrest, and can provide a comfortable feeling in use. To do.

Therefore, as a result of intensive research in view of the drawbacks found in the prior art, the present inventor is a chair provided with a lumbar support on the back of the chair, and the lower end of the lumbar support extends downward, The extended end is provided with a horizontal axis having a first thread formed on the outer peripheral surface of one end and a hole so that the threaded portion is hollow, and the horizontal axis is provided at both end edges. A support seat having ears is provided, a fixing member is provided on each of the ears of the support seat, and a concave portion is formed on one of the fixing members at a position corresponding to one end of the horizontal axis. A movable block formed by forming a second thread corresponding to the first thread formed at one end of the horizontal shaft is provided on the inner peripheral surface of the horizontal shaft, and a hole at one end of the horizontal shaft and a concave portion of the fixing member An elastic body is provided between the movable member and the fixed member. Provided on the side of the cover focuses in that it can solve the problem by the chair formed by providing the operating lever rotatably, and completed the present invention based on the finding.

Hereinafter, this device will be specifically described.
The chair according to claim 1 is a chair provided with a waist support body capable of adjusting an inclination angle on the back of the chair,
The waist support has a lower end extending downward, a first thread is formed on the outer peripheral surface of one end at the extended end, and a hole is formed so that the threaded portion is hollow. Provided,
The horizontal shaft is provided with a support seat having ears at both end edges, and a fixing member is provided on the ear of the support seat,
A concave portion is formed in one of the fixing members at a position corresponding to one end of the horizontal shaft, and a second screw corresponding to a first thread formed on one end of the horizontal shaft is formed on the inner peripheral surface of the concave portion. Provide a movable block that forms a mountain,
An elastic body is provided between the hole at one end of the horizontal shaft and the concave portion of the fixing member,
The fixing member is provided with a cover from the outside, and an operation lever is provided rotatably on the cover on the side where the movable block is provided,
The fixing member maintains the state where the first screw and the second screw are engaged with each other by the additional urging force of the elastic body, and the engagement between the first screw and the second screw is released by operating the operation lever. The tilt angle of the lumbar support is adjusted to maintain the tilt angle of the lumbar support.

The chair according to claim 2 is a chair that serves as a waist support body in which the backrest of the chair can adjust the inclination angle,
The backrest is provided with a horizontal axis having a lower end extending downward, a first thread formed on the outer peripheral surface of one end, and a hole formed so that the threaded portion is hollow. ,
The horizontal shaft is provided with a support seat having ears at both end edges, and a fixing member is provided on the ear of the support seat,
A concave portion is formed in one of the fixing members at a position corresponding to one end of the horizontal shaft, and a second screw corresponding to a first thread formed on one end of the horizontal shaft is formed on the inner peripheral surface of the concave portion. Provide a movable block that forms a mountain,
An elastic body is provided between the hole at one end of the horizontal shaft and the concave portion of the fixing member,
The fixing member is provided with a cover from the outside, and an operation lever is provided rotatably on the cover on the side where the movable block is provided.
The fixing member maintains the state where the first screw and the second screw are engaged with each other by the additional urging force of the elastic body, and the engagement between the first screw and the second screw is released by operating the operation lever. The inclination angle of the backrest is adjusted, and the inclination angle of the backrest is maintained.

  According to a third aspect of the present invention, the horizontal axis in the first or second aspect is a tubular body and is fitted to the extended end.

  The chair according to claim 4 is a chair provided with a lumbar support that can adjust the height on the back of the chair, and the lumbar support is configured to be divided into a base part and a cushion part, The base is formed with an engaging groove having rack-like teeth on the bottom surface at a substantially central position on the front surface, and a line extending upward from both sides of the engaging groove reaches the upper edge of the base. A rail is provided at the position, the cushion part is provided with a plate-like body on the back surface, and a slide groove is formed upward at a position corresponding to the rail provided on the base at the bottom of the plate-like body. , A portion near the center of the lower end of the plate-like body extends downward, is an extended portion of the lower portion, forms an engagement portion at a position corresponding to the engagement groove of the base, and operates at the end The operation part formed at the end of the plate-like body is pulled forward. The engagement portion formed on the plate-like body by pushing up and the engagement groove formed on the base are released, and the cushion portion and the plate-like body 21 are moved up and down to raise the height. It adjusts and it is comprised so that an operation part may be separated from a hand and the engaging part of this plate-shaped body and the engaging groove of this base may be engaged, and an up-and-down movement is restrict | limited.

The chair according to claim 5 is a chair serving as a lumbar support whose height can be adjusted by the backrest of the chair, and the backrest is configured to be divided into a base portion and a cushion portion, and the base is a front surface. An engagement groove having rack-like teeth formed on the bottom surface is formed at a substantially central position of the rail, and a rail is provided at a position where a line extending upward from both sides of the engagement groove reaches the upper edge of the base, The cushion portion is provided with a plate-like body on the back surface, and a slide groove is formed upward at a position corresponding to the rail provided on the base at the bottom of the plate-like body. A portion near the center of the lower end extends downward, is an extended portion of the lower end, and an engagement portion is formed at a position corresponding to the engagement groove of the base, and an operation portion is formed at the end. Pushing up the operating part formed at the end of the plate-like body The engagement between the engagement portion formed on the plate-like body and the engagement groove formed on the base is released, and the height is adjusted by moving the cushion portion and the plate-like body up and down, The operation portion is separated from the hand, and the engaging portion of the plate-like body and the engaging groove of the base are engaged to limit the vertical movement.

  According to a sixth aspect of the present invention, a fixing groove is formed in the base in the fourth or fifth aspect, and the rail in the fifth aspect is provided in the fixing groove.

  In the chair according to claim 7, the rail provided on the base in claim 4 or claim 5 is formed integrally with the base.

  The chair according to the present invention is provided with a lumbar support and has an advantage that a comfortable feeling in use can be obtained by supporting the lumbar portion of the user even if the chair is not leaned on the backrest.

Further, not only the structure is simple, but also a part of the members can be integrally molded, so that there is an advantage that the production cost can be reduced and the productivity can be increased.

The present invention provides a chair provided with a waist support, wherein the waist support has a lower end extending downward, and at the extended end, a first thread is formed on the outer peripheral surface of one end, In addition, a horizontal shaft formed with a hole so that the threaded portion is hollow is provided, and a support seat having ears formed at both end edges is provided on the horizontal shaft, and fixed to the ear portion of the support seat. A member is provided, and a concave portion is formed on one of the fixed members at a position corresponding to one end of the horizontal shaft. On the inner peripheral surface of the concave portion, a first thread formed on one end of the horizontal shaft is provided. A movable block formed with a corresponding second thread is provided, an elastic body is provided between the hole at one end of the horizontal shaft and the concave portion of the fixing member, and a cover is provided on the fixing member from the outside. At the same time, an operating lever is rotatably provided on the cover on the side where the movable block is provided. With such a configuration, the object of supporting a user's lower back portion and providing a comfortable feeling in use even when the user is not leaning on the backrest is achieved.
In order to describe the structure and features of the chair having such a configuration, a specific example will be given and described in detail below with reference to the drawings.

  As disclosed in FIG. 7, the chair according to the present invention is provided with a waist support 8 on a backrest 91. The lumbar support 8 can freely adjust the inclination angle and height, and supports the lumbar part in contact with the user's sacral spine, giving a comfortable feeling in use. The lumbar support 8 which is a feature of this device will be described in detail below.

As disclosed in FIGS. 1 and 2, the waist support 8 is configured to be divided into a base portion 1 and a cushion portion 2, and the waist support 1 further includes a support seat 3, a fixed member 4, and a movable member. The block 5, the elastic body 54, the covers 61 and 62, and the operation lever 7 are included.

  The base 1 has an engaging groove 11 formed with rack-like teeth on the bottom surface at a substantially central position on the front surface, and a line extending upward from both sides of the engaging groove 11 is an upper end edge of the base 1. The fixed groove 12 is formed at each position reaching the portion, and the rail 13 is screwed into the fixed groove 12 to be positioned.

The base 1 is formed by injection molding of a plastic material. In this case, the lower end portion is formed in a hollow shape through which the hole portion penetrates in the direction. The hollow portion is provided with a horizontal shaft 14 in which a first thread 15 is formed on the outer peripheral surface of one end, and a hole 151 is formed so that the screwed portion is hollow. In the embodiment, as disclosed in FIG. 3, a tubular body having a first thread 15 formed on the outer peripheral surface at one end is fitted. However, the tubular body may be formed integrally with the base 1.

The cushion part 2 is provided with a plate-like body 21 on the back surface. A slide groove 212 is formed upward at a position corresponding to the rail 13 provided on the base 1 on the bottom side of the plate-like body 21. In addition, the plate-like body 21 has a portion near the center of the lower end extending downward,
The engaging portion 211 is formed at a position corresponding to the engaging groove 11 of the base 1 and the operation portion 213 is formed at the end.

  The support seat 3 is provided with ears 31 at both edge portions. The ear part 31 is notched from the upper end and forms a notch downward. A plurality of screw holes are drilled in the ear. The support seat 3 is connected to a chair 9 (see FIG. 7).

  The fixing member 4 is notched from the lower end and forms a notch upward. Also, symmetrically extending extending portions 41 extending from both side surfaces are integrally formed, and the fixing member 4 is screwed to the supporting seat 3 at a position corresponding to the screw hole formed in the ear portion 31 of the supporting seat 3. A screw hole is formed for mating.

  The movable block 5 is shorter than the extending portion 41 of the fixed member 4, and a concave portion 521 is formed at a position corresponding to one end of the horizontal shaft 14 on the surface of the fixed member 4, and the inner periphery of the concave portion 521 is formed. A second thread 52 corresponding to the first thread 15 formed at one end of the horizontal shaft 14 is formed on the surface. One of the first thread 15 and the second thread 52 is a male thread and the other is a female thread. A concave groove 53 whose inner surface forms an arc in the axial direction is formed at the other end. Further, a positioning groove 51 having a width equal to the width of the extending portion 41 is formed at a position corresponding to the extending portion 41 on the side surface of the movable block 5 on the side surface of the fixed member 4.

  Each of the covers 61 and 62 has an opening surface at one end, and notches 611 and 621 are formed at the lower end of the opening surface. One cover 61 is formed with a through hole 612 and a lateral groove 613 connected to the through hole 612.

  When assembling each of the above-described members, as shown in FIGS. 1, 3, and 5, the support seat 3 is attached to the horizontal shaft 4 from the notches of both ears 31, and the fixing member 4 is similarly cut off at the bottom of the notch. To the horizontal shaft and the support seat 3 and the fixing member 4 are screwed together. Next, the movable block 5 and the fixed member 4 are connected.

  Further, the elastic member 4 is prepared separately and provided between the hole 151 of the base 1 and the concave portion 521 of the movable block 5.

  Next, the operation lever 7 and the bearing pin 71 are provided in the through hole 612 and the lateral groove 613 of the cover 61 so that the operation lever 7 can be rotated, and the covers 61 and 62 are screwed to the both fixing members 4 from the outside. Match.

  Further, the rail 13 of the base 1 is inserted into the slide groove 212 formed in the plate-like body 21 of the cushion portion 2, and the engagement portion 211 of the plate-like body 21 is engaged with the engagement groove 11 of the base 1 for positioning. .

  The above-described waist support 8 can adjust the inclination angle. That is, when the operation lever 7 is pressed as disclosed in FIG. 4, the movable block 5 receives the additional biasing force of the elastic member 54, and the second screw thread 52 is detached from the first screw thread 15. In this case, the waist support body can adjust the inclination angle to an arbitrary angle. That is, by adjusting the angle of contact with the user's waist or back, it is possible to achieve a state suitable for ergonomics, and a favorable feeling of comfort can be obtained.

  After adjusting the angle of the waist support 8 by the above-described operation, when the operation lever 7 is returned to its original position, the movable block 5 is pressed by the operation lever, and as shown in FIG. It will be in the state which meshed | engaged with the 1st screw thread 15, and a waist | hip | lumbar part support body will be positioned and will be in the stable state.

  Moreover, the waist part support body 8 mentioned above can adjust height. As shown in FIGS. 5 and 6, when the operating portion 213 formed at the end of the plate-like body 21 is pushed up while being pulled forward, the engaging groove 211 formed on the base 1 is formed by the engaging portion 211 formed on the plate-like body 21. Free from restrictions. In this state, since the slide groove 212 and the rail 13 of the base 1 are slidably provided, the cushion portion 2 and the plate-like body 21 can be moved up and down. Next, the cushion portion 2 and the plate-like body 21 are adjusted to an appropriate height, and when the operation portion 213 is released from the hand, the engagement portion 211 of the plate-like body 21 is engaged with the engagement groove 11 of the base 1, Vertical movement is restricted. That is, by adjusting the height of contact with the user's waist or back, it is possible to achieve a state suitable for ergonomics, and a favorable feeling of comfort can be obtained.

  As disclosed in FIG. 7, the chair 9 according to the present invention forms a mounting space 911 in the backrest 91 and provides a waist support 8 in the mounting space 9111. Such a structure can be adjusted so as to completely contact the user's body by adjusting the inclination angle and height of the waist support 8 as required. Therefore, it can be in a state suitable for ergonomics, and a favorable feeling of comfort can be obtained.

  In the embodiment disclosed in FIG. 8, the lumbar support 8 'is provided on the chair 9' as a backrest. Even in such a structure, the inclination angle and height of the lumbar support 8 'can be adjusted as necessary, and can be adjusted so as to come into full contact with the user's body. Therefore, it can be in a state suitable for ergonomics, and a favorable feeling of comfort can be obtained.

  Further, as disclosed in FIG. 9, the base 1 and the rail 13 may be integrally molded.

  The above is a preferred embodiment of the present invention, and does not limit the scope of implementation of the present invention. Therefore, any modifications or changes that can be made by those skilled in the art, which are made within the spirit of the present invention and have the same effect on the present invention, belong to the scope of the utility model claims of the present invention. And

It is an exploded view of the waist support in this device. It is a perspective view of the waist | hip | lumbar part support body disclosed in FIG. It is the side view of the waist | hip | lumbar part support body disclosed to FIG. 1, and the partial cross section explanatory drawing which showed the internal structure. It is explanatory drawing which showed operation which inclines the waist | hip | lumbar part support body disclosed in FIG. It is the side view of the waist | hip | lumbar part support body disclosed to FIG. 1, and the partial explanatory view which showed the internal structure. It is explanatory drawing which showed operation which adjusts the height of the waist | hip | lumbar part support body disclosed to FIG. It is a perspective view of the chair which provided the waist | hip | lumbar part support body in this device. It is the perspective view which showed the chair by other embodiment. It is an exploded view of the waist | hip | lumbar part support body by other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 11 Engagement groove 12 Fixation groove 13 Rail 14 Horizontal shaft 15 1st thread 151 Hole part 2 Cushion part 21 Plate-shaped body 211 Engagement part 212 Slide groove 213 Operation part 3 Support seat 31 Ear part 4 Fixing member 41 Extension Part 5 Movable block 521 Concave part 53 Concave groove 54 Elastic body 61, 62 Cover
611, 621 Notch 612 Through hole
613 Horizontal groove 7 Operation lever 71 Axial support pins 8, 8 'Lumbar support 9, 9' Chair 91 Backrest 911 Mounting space

Claims (7)

A chair provided with a waist support that can adjust the inclination angle on the back of the chair,
The waist support has a lower end extending downward, a first screw thread is formed on the outer peripheral surface of one end at the extended end, and a hole is formed so that the threaded portion is hollow. Provided,
The horizontal shaft is provided with a support seat having ears at both end edges, and a fixing member is provided on the ear of the support seat,
A concave portion is formed in one of the fixing members at a position corresponding to one end of the horizontal shaft, and a second screw corresponding to a first thread formed on one end of the horizontal shaft is formed on the inner peripheral surface of the concave portion. Provide a movable block that forms a mountain,
An elastic body is provided between the hole at one end of the horizontal shaft and the concave portion of the fixing member,
The fixing member is provided with a cover from the outside, and an operation lever is provided rotatably on the cover on the side where the movable block is provided,
The fixing member maintains the state where the first screw and the second screw are engaged with each other by the additional urging force of the elastic body, and the engagement between the first screw and the second screw is released by operating the operation lever. A chair configured to adjust an inclination angle of the lumbar support and to maintain the inclination angle of the lumbar support. A chair that serves as a lumbar support that allows the backrest of the chair to adjust the inclination angle,
The backrest is provided with a horizontal axis having a lower end extending downward, a first thread formed on the outer peripheral surface of one end, and a hole formed so that the threaded portion is hollow. ,
The horizontal shaft is provided with a support seat having ears at both end edges, and a fixing member is provided on the ear of the support seat,
A concave portion is formed in one of the fixing members at a position corresponding to one end of the horizontal shaft, and a second screw corresponding to a first thread formed on one end of the horizontal shaft is formed on the inner peripheral surface of the concave portion. Provide a movable block that forms a mountain,
An elastic body is provided between the hole at one end of the horizontal shaft and the concave portion of the fixing member,
The fixing member is provided with a cover from the outside, and an operation lever is provided rotatably on the cover on the side where the movable block is provided,
The fixing member maintains the state where the first screw and the second screw are engaged with each other by the additional urging force of the elastic body, and the engagement between the first screw and the second screw is released by operating the operation lever. A chair configured to adjust an inclination angle of the backrest and maintain the inclination angle of the backrest.   The chair according to claim 1 or 2, wherein the horizontal axis is a tubular body and is fitted to the extended end. A chair provided with a waist support that can be adjusted in height on the back of the chair,
The lower back support is configured to be divided into a base portion and a cushion portion,
The base is formed with an engaging groove having rack-like teeth on the bottom surface at a substantially central position on the front surface, and a line extending upward from both sides of the engaging groove reaches the upper edge of the base. Rail at the position,
The cushion portion is provided with a plate-like body on the back surface, and a slide groove is formed upward at a position corresponding to the rail provided on the base at the bottom of the plate-like body. A portion near the center of the lower end extends downward, is an extended portion of the lower end, and an engagement portion is formed at a position corresponding to the engagement groove of the base, and an operation portion is formed at the end. ,
The cushion part is released by releasing the engagement between the engaging part formed on the plate-like body and the engaging groove formed on the base by pushing up the operating part formed at the end of the plate-like body while pulling it up. And the plate-like body are moved up and down to adjust the height, and the operating portion is moved away from the hand to engage the engagement portion of the plate-like body and the engagement groove of the base to move up and down. A chair, characterized in that it is configured to restrict. A chair that serves as a lumbar support that allows the back of the chair to be adjusted in height,
The backrest is configured to be divided into a base portion and a cushion portion,
The base is formed with an engaging groove having rack-like teeth on the bottom surface at a substantially central position on the front surface, and a line extending upward from both sides of the engaging groove reaches the upper edge of the base. Rail at the position,
The cushion portion is provided with a plate-like body on the back surface, and a slide groove is formed upward at a position corresponding to the rail provided on the base at the bottom of the plate-like body. A portion near the center of the lower end extends downward, is an extended portion of the lower end, and an engagement portion is formed at a position corresponding to the engagement groove of the base, and an operation portion is formed at the end. ,
The cushion part is released by releasing the engagement between the engaging part formed on the plate-like body and the engaging groove formed on the base by pushing up the operating part formed at the end of the plate-like body while pulling it up. And the plate-like body are moved up and down to adjust the height, and the operating portion is moved away from the hand to engage the engagement portion of the plate-like body and the engagement groove of the base to move up and down. A chair, characterized in that it is configured to restrict.   The chair according to claim 4 or 5, wherein a fixing groove is formed in the base, and the rail is provided in the fixing groove. 6. The chair according to claim 4, wherein a rail provided on the base is formed integrally with the base.

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