JP3100800U - Office chair - Google Patents

Abstract

An object of the present invention is to provide a two-way office chair capable of maintaining an optimum posture even when working with a computer, in addition to using a general office chair, while enhancing the structure.
A sliding groove (13) is provided on a seat base (12), and three fixing holes (15) provided at different positions on the sliding groove (13) are used to connect a back connecting rod (14) provided in the sliding groove (13). Due to the difference in height, the adjusting handle 70 at one end of the backrest connecting rod 14 is slid on the sliding groove 13 and fixed by the fixing hole 15 so that the knee can be placed on the backrest cushion 17 during computer work or the like. The seat cushion 11 is positioned in a comfortable state, and at the same time, the tilt angle of the seat cushion 11 is adjusted by the control handle 45 on the seat base 12, so that the seat cushion 17 and the backrest connecting rod 14 are tilted to maintain a comfortable posture during computer work.
[Selection diagram] Fig. 1

Description

  The present invention relates to a structure of a two-way office chair, and more particularly, to an office chair provided with a structure that can be used in two ways, that is, a usage as a general office chair and a usage suitable for computer work.

  As a conventional office chair, for example, a chair provided with a backrest angle adjusting mechanism has been developed. First, a chair having such an angle adjusting function will be briefly described (see Patent Document 1). A frame is welded to one side of a box provided in a seat, and a spring is provided in the frame. A plurality of spindle-shaped connecting members and a cover tube are provided on a side of the frame opposite to the box, and the connecting member, the cover tube, and the spring are pierced on a push rod in the box. And the push rod is secured to the other side of the box by a nut. Further, a handle device is provided, and the handle device includes a pressure control block pivotally provided on the seat, and at one end of the pressure control block, a pressure control step slightly protruding and an open step depressed slightly inward are provided. A handle is provided at the other end, and when the handle is pushed upward, a pressure control step at one end of the pressure control block presses the push bar, and the push bar further presses the spring; The cover tube moves outward. In this way, the connecting body on the push rod is released, so that the chair can be adjusted.On the contrary, when the handle is lowered, the pressure control stage of the pressure control block does not push the push rod, Therefore, the spring in the frame returns to its original position by its elasticity, and the connecting body returns to its original orientated state and is fixed.

  Further, a stop wall is welded to the base, and a spindle-shaped connecting body, a washer, and a pressure control pipe are provided on the opposite side of the stop wall, and the stop wall, washer, A lateral lever penetrating the connecting body and the control pipe is provided. The end of the lateral lever protrudes from the outside of the left side wall of the base, is provided with a spring and a pressure control plate fixed to the protruding side, and is fixed by a nut. The other end of the lateral lever has a flat shape, and a groove is provided at an appropriate position. The groove provides a place where the hook of the hook device is hooked. By doing so, by pushing up the hook upward, the horizontal lever is interlocked and loosened, and then the washer, the connecting body and the pressure control pipe on the horizontal lever are opened, and the vertical angle of the chair can be freely adjusted. It is a mechanism that can be adjusted.

  However, in the above-described conventional chair structure, the frame and the box are joined by welding, so the cost is high, and the strength of the structure is reduced due to the high temperature during welding. There is.

  In addition, since the above-mentioned spring is relatively large in diameter and strong, the force required to operate the handle is relatively large. Since a rigid fixing structure is not provided in the connection of the pressure control block, there is a disadvantage that the handle and the pressure control block are likely to come off by using such a large force many times.

  Further, a groove is provided on the flat end of the lateral lever to provide a hooking point, and thereby the interlocking of the lateral lever is controlled. However, when the lateral lever is moved, a relatively large force is applied. However, there are disadvantages that the strength of the structure is easily lowered and the structure is easily broken, and at the same time, since the structure has many small parts, it takes time and cost to manufacture and assemble.

  Incidentally, in the modern computer society, such conventional office chairs are not suitable for performing computer work, and they cannot relax and sit for a long time. Also fall. That is, in order to perform computer work comfortably, it can be said that it is desirable to arrange computer work chairs separately from general office chairs.

  Therefore, among the drawbacks described above, office chairs that have been developed to provide chairs particularly suitable for computer work are provided with tracks on both sides of the base of the backrest, and the tracks are provided by connecting rods at the bottom of the backrest. There is a structure in which adjustment is performed by being installed to slide on the sliding portion, and an adjustment portion for adjusting the inclination angle of the backrest base portion is provided at an appropriate place on the seat base. (See Patent Document 2).

With the above structure, the back connecting rod can be used for general office work in a state where the back connecting rod is in an upright state with respect to the back base, and when the back is used for computer work by adjusting it. First, the adjusting portion is pulled downward, and the fixing bar fixing the backrest connecting rod is moved downward, so that the backrest connecting rod freely slides on the track, and the backrest connecting Since the rod is bent downward and the backrest (footrest) cushion provided on the backrest connecting rod can be adjusted up and down, placing the knee on the cushion enables comfortable computer work. Has become.
Taiwan Patent No. 524076 Taiwan Patent No. 347680

  However, the conventional office chair suitable for computer work as described above also has the following disadvantages.

  First, when the backrest connecting rod is bent and used for computer work, the trajectory on the backrest base is only fixed at a fixed bending angle with respect to the sliding part on the backrest connecting rod, and thus the backrest ( The space for adjusting the cushion is limited to a small extent, and the user cannot adjust the cushion to a comfortable position depending on the height of the user.

  In addition, the back connecting rod supporting the weight of the user with a cylindrical fixing rod having a weak and easily slidable structure may be detached or cracked, and when the back connecting rod is to be bent, First, it is not possible to move the backrest connecting rod unless the fixing rod is first moved downward, and there is a problem that it takes time to adjust the backrest.

  Further, in the method of adjusting the inclination angle of the backrest base, the adjustment is performed by bolts. However, the weight of the user is completely absorbed by the thin and small adjustment portion, and the load is too large or used for a long time. As a result, there is a possibility that the adjustment unit may be damaged and cannot be used, or a situation may occur in which a user is injured.

  Accordingly, it is an object of the present invention to provide an office chair in which a user can maintain an optimal posture even when working on a computer, in addition to the use of a general office chair, while strengthening the structure.

The office chair of the present invention is provided with an adjustment base serving as a support for the chair body, a seat base having a seat cushion provided at an upper end of the adjustment base, and a seat symmetrical with the seat base. Is provided with an adjusting handle for moving the adjusting base up and down, and a sliding groove is provided on both sides of the seat base to provide a place for sliding the backrest connecting rod, and an appropriate place for the sliding groove. In order to locate the place where the back connecting rod is curved, a plurality of fixing holes are provided at different positions,
The backrest connecting rod has an L-shape, provided at one end with an adjustment rod fixed in the fixing hole of the sliding groove, and at the other end with a backrest cushion capable of performing up and down adjustment, A fixing rod is provided between the adjusting rod and the back cushion, the fixing rod being positioned relative to the positioning groove provided in the seat base,
A second hole is provided at an appropriate position of the seat base for screwing a seat cushion, and a first hole is provided at a different end of the seat base, and a long groove is provided on both sides of the first hole. By providing a place to engage the control device,
The control device is provided with a pivotal portion engaged with the long groove, a hole is provided at one end of the pivotal portion to provide a place where a horizontal bar is inserted, and a penetrating hole is provided at both sides of the pivotal portion. Providing a place to insert a positioning pin by providing a hole,
In the cover portion, a hole is provided at one end where the pivot portion is drilled, and the hole is drilled out of the pivot portion to mutually suppress the backrest base,
The horizontal bar engages with the first hole on one side of the backrest base, further penetrates the spring provided in the pivoting portion and the perforation of the pivoting portion, and then sequentially inserts a pipe, a washer, a plurality of braking pieces, and a backrest. After penetrating into the first hole on the other side of the base, it is screwed tight with a nut, and on the brake piece, a pivot hole provided in the lower part of the seat plate below the back cushion and a hole pivotally provided, A sliding groove for adjusting the inclination angle of the seat cushion is provided,
The control handle is provided in a through hole of the pivot portion, and a perforation is provided in which a localization pin is engaged at a position opposed to the through hole,
The positioning pin is provided in a groove of the cover, a through hole of the pivot, and a bore of a control handle in the pivot, so that the control handle and the pivot are in an interlocking relationship. Engaged by spring washers.

  The office chair of the present invention can be adjusted according to the user, whether it is for general office work or computer work, and it can be used while maintaining a comfortable posture for a long time, and at the same time, the structure is There is an effect that it can be enhanced to enhance safety in use.

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

  As shown in FIGS. 1 to 3, the office chair body 1 according to the first embodiment of the present invention is provided with an adjustment base 10 serving as a support, and the adjustment base 10 is provided with a seat base 11 provided with a seat cushion 11. 12 are attached. The seat base 12 is composed of two symmetrical pieces. The seat base 12 is provided with an adjustment handle 70 for controlling the vertical movement of the adjustment base 10, and each piece of the seat base 12 is provided with a sliding groove 13. The adjusting rod 16 of the backrest connecting rod 14 is engaged with the sliding groove 13, and the adjusting rod 16 of the backrest connecting rod 14 is positioned at each position in the sliding groove 13. A fixing hole 15 is formed at an appropriate place.

  The backrest connecting rod 14 has an L-shape, and the shorter side of the L-shaped backrest connecting rod 14 slides on the adjusting rod 16 in the sliding groove 13 of the seat base 12. It is provided to be able to. Conversely, a back cushion 17 that can be adjusted up and down is provided on the long side of the L-shaped back connecting rod 14. A fixing rod 18 is provided between the adjusting rod 16 and the back cushion 17. The fixing rod 18 is installed in a positioning groove 19 provided in advance in the seat base 12, and 12 is in a state of being aligned with the back connecting rod 14.

  The seat base 12 is provided with an ear having a pivotal portion at the lower end of the seat plate 20 which is screwed to the seat cushion 11 at an appropriate position, and a second hole 22 pivotally provided. A long groove 23 is provided on both sides of the first hole 21 of one of the pieces of the sheet base 12, and the long groove 23 is a place where the control device 30 is formed.

  The control device 30 has a substantially U-shaped pivotal contact portion 31 engaged with the long groove 23, and a perforation 32 is provided at one end of the pivotal contact portion 31. A point for inserting a rod 33 is provided, and a pair of through holes 34 are formed in both sides of the pivotal connection portion 31, and the through holes 34 are adapted to receive a positioning pin 35. .

  The cover portion 36 is provided at one end thereof with a hole 37 for engaging the pivotal contact portion 31 protruding outside the long groove 23, and the cover portion 36 is pressed against the seat base 12.

  The horizontal bar 33 is engaged with the first hole 21 on one side of the seat base 12, and subsequently is engaged with a spring 38 in the pivotal contact portion 31 and a perforation 32 of the pivotal contact portion 31, 39, the washer 40, the plurality of braking pieces 41, and the first hole 21 on the other side of the seat base 12, and then screwed and fixed by a fixing component 42 such as a nut. In addition, a hole 43 pivotally provided with the seat plate 20 at the lower end of the seat cushion 11 and a sliding groove for adjusting an inclination angle of the seat cushion 11 are provided on a braking piece 41 formed on the horizontal bar 33. 44 are provided.

  The control handle 45 is installed in the through hole 34 of the pivotal connection part 31, and a hole 48 in which the positioning pin 35 is engaged is provided at a position where the control handle 45 contacts the through hole 34.

  The positioning pin 35 is engaged with the groove 47 of the cover part 36 and the through hole 34 of the pivot part 31, is installed on the control handle 45 in the pivot part 31, and is finally engaged with the spring washer 50. ing. Thus, the control handle 45 and the pivotal contact portion 31 constitute a structure that interlocks.

  As shown in FIG. 4, when the fixing bar 18 of the backrest connecting rod 14 is installed and positioned in the positioning groove 19 of the seat base 12, when the backrest connecting rod 14 is seated as an office chair, it is most likely. It will be in a comfortable upright state. When actually using the first embodiment of the present invention, for example, when using a computer, the backrest connecting rod 14 is pulled up so as to tilt forward, so that the fixing rod 18 separates from the positioning groove 19 of the seat base 12. Then, the adjusting rod 16 of the backrest connecting rod 14 is moved from the front to the rear by the sliding groove 13 (see FIG. 5), and subsequently the backrest connecting rod 14 is lowered downward by tilting the backrest connecting rod 14 rearward, whereby the backrest connecting rod is lowered. The adjusting rod 16 of the rod 14 is engaged in the fixing hole 15 provided at the uppermost end of the sliding groove 13 (see FIG. 6). By doing so, the user can drop the buttocks on the seat cushion 11 and bring the knee into close contact with the back cushion 17 of the back connecting rod 14 (see FIG. 7), which is optimal when using a computer. Posture can be maintained.

  Further, in the first embodiment of the present invention, in order to provide a more comfortable sitting comfort during such work, the control device 30 for adjusting the inclination angle of the seat cushion 11 so that the inclination angle of the seat cushion 11 can be set arbitrarily. Is provided. This is so that when the control handle 45 is pushed upward as shown in FIG. 8, the pivoting portion 31 cooperates to contract the spring 38 inward, causing the pivoting portion 31 to move laterally. I do. At this time, the penetration tube 39 is loosened together with the washer 40 and the braking piece 41 due to the movement of the pivotal contact portion 31, so that the seat base 12 can be pushed upward. At this time, the sliding groove 44 provided in the braking piece 41 inclines the braking piece 41 screwed with the seat plate 20 on the seat base 12 to a required angle and further raises the control handle 45 downward. (See FIG. 9). The spring 38 in the pivoting portion 31 restores the original stretched state by its elasticity, thereby pushing the pivoting portion 31 to return the pivoting portion 31 to the original position, and the braking piece having the inclination angle is provided. A fixing effect of 41 is achieved.

  The seat cushion 11 in the inclined state is slightly inclined forward by the center of gravity of the user (see FIG. 10), and the center of gravity of the user of the computer is absorbed by the back cushion 17 on the back connecting rod 14, and the length is long. Even when working on the computer for hours, the user's body can be kept in a relaxed state, which leads to an increase in work efficiency.

  In the office chair of the first embodiment, three fixing holes 15 are provided at intervals on the sliding groove 13 of the seat base 12 in consideration of the height of different users, and the height of the user is reduced. If the height is slightly higher, the adjusting rod 16 of the backrest connecting rod 14 is slid by the above-described operation method, and is positioned in the lower end fixing hole 15. At this time, the angle at which the backrest connecting rod 14 is tilted rearward is further increased (see FIG. 11), whereby the knee of the tall person comes into close contact with the backrest cushion 17 on the backrest connecting rod 14, and is moderately pressed. Status can be provided. Similarly, when the adjusting rod 16 is adjusted to the fixing hole 15 at the lowermost end of the slide groove 13, the backrest connecting rod 14 falls further backward to exhibit a larger inclination angle (see FIG. 12). The design of the three-stage fixing hole 15 on the sliding groove 13 achieves the purpose of adapting to different user heights.

  Further, the office chair according to the first embodiment of the present invention is provided at the lower end of the adjusting base 10 so as to prevent the body 1 from slipping unexpectedly when the computer operator tilts the center of gravity forward, thereby causing danger. Five casters 60 having a braking effect are provided, so that the safety of the user can be maintained.

  In addition, since the pivotal connection portion 31 is not completely fixed and is connected to the seat base 12 in a movable state, there is no need for welding work and the brittleness of the structure caused by performing high-temperature welding. The instability and danger of the coming chair are avoided, and the control handle 45 and the pivotal connection 31 are pivoted by the positioning pin 35 which is superior in connection strength. The risk of coming off is also prevented.

  In addition to the general use of office chairs, it can be applied as a computer work office chair that can maintain an optimal posture during computer work.

FIG. 2 is an exploded explanatory view showing the structure of the office chair of the first embodiment of the present invention. FIG. 2 is an explanatory view illustrating the appearance of a portion illustrated in FIG. 1 after assembly. FIG. 1 is an explanatory diagram illustrating an appearance of a first embodiment of the present invention. It is explanatory drawing which shows the state which sat down. FIG. 6 is an explanatory diagram illustrating seat position adjustment when the office chair of Embodiment 1 is used for computer work or the like. FIG. 6 is an explanatory diagram illustrating seat position adjustment when the office chair of Embodiment 1 is used for computer work or the like. It is explanatory drawing which shows the state which sat down. It is explanatory drawing which shows a seat cushion adjustment. It is explanatory drawing which shows a seat cushion adjustment. It is explanatory drawing which shows a seat cushion inclination angle. FIG. 4 is an explanatory diagram illustrating a state in which a bending angle adjustment is performed on the backrest connecting rod according to the first embodiment. It is explanatory drawing which shows a mode that the bending angle adjustment was performed with respect to the back connection rod.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Chair main body 10 Adjustment base 11 Seat cushion 12 Seat base 13 Sliding groove 14 Back connecting rod 15 Fixing hole 16 Adjusting rod 17 Back cushion 18 Fixing rod 19 Orientation groove 20 Seat plate 21 First hole 22 Second hole 23 Long groove 30 Control device 31 Pivot part 32 Perforation 33 Horizontal rod 34 Through hole 35 Orientation pin 36 Cover part 37 Hole 38 Spring 39 Penetration tube 40 Washer 41 Brake piece 42 Nut 43 Hole 44 Sliding groove 45 Control handle 47 Groove 48 Perforation 50 Spring washer 60 caster 70 adjustment handle
Attorney Attorney Susumu Ito

Claims (3)

In an office chair composed of an adjustment base, a seat base, a backrest connecting rod, and a control device,
An adjustment base on which a seat base on which a seat cushion is installed at the top is installed,
A seat base having a long groove provided with a stereotactic groove and a plurality of fixing holes,
An adjustment rod positioned in a plurality of fixing holes formed in the long groove, and a backrest connecting rod having a fixed rod positioned in the positioning groove of the seat base,
A control device including a pivoting portion, a spring, a pipe, a plurality of brake pieces, a cover portion outside the seat base, and a horizontal bar provided with these components;
With
A pivot portion of the spring is bored inside the seat base, and between the pivot portion and the seat base, a plurality of brake pieces screwed with the pipe, washer, and seat cushion are provided.
A cover portion is covered on a protruding and exposed side of the pivotal contact portion formed in the seat base, and a control handle interlocked with the pivotal contact portion is pivotally provided in the cover portion, and the cover portion, The pivot, the spring, the tube, the washer and the plurality of restraining pieces are perforated by cross bars on the seat base;
A plurality of fixing holes provided at different positions in the long groove of the seat base are selectively positioned by adjusting rods provided on the back connecting rod in the long groove of the seat base, and the back connecting rod has a different curvature. An office chair characterized in that it is adjusted to a position that maintains a comfortable posture according to the height of different users by a seat base that is adjusted to an angle and at the same time an inclination angle is adjusted.   A seat plate is provided at the lower end of the seat cushion, and the lower end of the seat plate has an ear provided with a pivotal contact hole so as to be screwed with the second hole of the seat base, and 2. The office chair according to claim 1, wherein an adjustment handle for adjusting the height of the adjustment base is provided at an appropriate position of the seat base.   The office chair according to claim 1, wherein five casters with a brake are provided at a lower end of the adjustment base.

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