JP5014677B2 - Operation lever device in a chair - Google Patents

Description

  The present invention operates the angle adjustment device for the backrest in the chair, the biasing force adjustment device for the backrest, the height adjustment device for the seat, and various adjustment means for adjusting the displacement and strength of other movable parts, The present invention relates to an operation lever device in a chair.

The present applicant has provided an operation lever at the lower part of the front end of the armrest of the chair, and the operation lever in the chair is operated by rotating the operation lever through the wire. A patent application has already been filed for the device (see Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 2004-49791 JP 2004-113501 A

  However, in each of the operation lever devices described in Patent Documents 1 and 2, the pulling amount of the wire with respect to the rotation angle of the operation lever is always constant. Even if the operating lever device is used as an operating lever device for operating the seat height adjustment device, or when trying to make them common, the required pulling amount and pulling force of the wire differ. Realization of commonality is difficult.

  In view of the above-mentioned problems of the prior art, the present invention can easily change the pulling amount of the wire with respect to the rotation angle of the operation lever by simply changing the way of hooking the wire, It is an object of the present invention to provide an operation lever device for a chair that can be widely applied as an operation means for various adjusting devices having different wire pulling and pulling strengths.

According to the present invention, the above problem is solved as follows.
(1) A base portion is pivotally attached to a part of the chair, and a wire hanging portion is provided at an intermediate portion of an operation lever having an operation portion provided at a distal end portion, and one end of the wire hanging portion is an operation lever. The other end of the wire is fastened to a part of the chair, and the other end is linked to the operated means of the chair. In an operation lever device in a chair that pulls the turned wire and operates the operated means, the wire hanging portion is the most advanced abutting portion closest to the tip of the operating lever with which the wire abuts. The wire can be attached in a plurality of modes different in the longitudinal direction of the operation lever .

(2) In the above item (1), the wire hooking portion has an arc shape whose center of curvature is an axis perpendicular to the longitudinal direction of the operation lever and the guide direction of the wire, A bypass passage is provided to bypass the wire.

(3) In the above item (1), the wire hooking portion is formed by a plurality of pins protruding in the longitudinal direction of the operation lever with a spacing through which the wire can be inserted.

(4) In the above items (1) to (3), the base end portion of the operation lever is pivotally attached to the lower portion of the front end of the armrest of the chair with an axis directed in the left-right direction.

(5) In the above items (1) to (3), the base end portion of the operation lever is pivotally attached to the lower surface side portion of the seat of the chair with an axis directed in the left-right direction.

(6) In the above items (1) to (5), the operated means can be turned by pulling the wire, and the turning of the back can be stopped by loosening the wire. It is assumed that the angle adjustment device for the backrest that can be used.

(7) In the above items (1) to (5), by pulling the wire to be operated, the lock release button of the lockable gas spring provided in the extendable leg of the chair is pushed to the operating position. Thus, the seat height can be adjusted, and when the wire is loosened, the lock release button returns to the non-operating position, thereby fixing the seat height.

According to the present invention, the following effects can be achieved.
According to the first aspect of the invention, the wire hooking portion, leading-edge abutment of the tip side of the most operating lever wire abuts, in the longitudinal direction to different aspects of the operation lever, and the wire can be attached Therefore, simply by changing the way the wire is hooked to the wire hook, the pulling amount and pulling force of the wire with respect to the rotation angle of the control lever can be easily changed. It can be widely applied as an operating means for various adjusting devices with different control devices, etc., and the operating lever device can be diverted or used in common among various adjusting devices with different wire pulling and strength. You can plan.

  According to the second aspect of the present invention, the wire hooking portion has an arcuate curved surface, and a bypass passage capable of bypassing the wire is provided at an intermediate portion thereof. In addition to being able to pull, by inserting a wire through a bypass passage provided in the middle of the arcuate curved surface, the portion of the wire hook where the wire is actually hooked can be displaced closer to the pivot of the operating lever. Therefore, the pulling amount of the wire with respect to the rotation angle of the operation lever can be reduced and the pulling force can be increased. In this case, the wire is slidably contacted along a part of the arcuate curved surface. Therefore, the wire can be pulled smoothly.

  According to the invention described in claim 3, since the wire hooking portion is formed by a plurality of pins protruding in the longitudinal direction of the operation lever so as to maintain a space through which the wire can be inserted, the structure of the operation lever is simplified. It can be manufactured at low cost, and the number of different ways of hanging the wires can be easily increased simply by increasing the number of pins.

  According to the invention described in claim 4, since the base end of the operation lever is pivotally attached to the lower part of the front end of the armrest of the chair with a shaft facing in the left-right direction, the operation lever can be operated with the tip of the hand placing the elbow on the armrest. The lever can be operated and operability is good.

  According to the fifth aspect of the present invention, since the base end portion of the operation lever is pivotally attached to the lower surface side portion of the seat of the chair with the axis facing the left-right direction, the operation lever is positioned below the seat. In addition, the operation lever can be easily operated by extending the hand below the seat.

  According to the sixth aspect of the present invention, the operated means is capable of rotating the backrest by pulling the wire, and the rotation of the backrest is stopped by loosening the wire. As the angle adjustment device for the twist, if the strength and stroke of the spring for returning the wire used in the device varies depending on the model, it can be handled by simply changing the wire method of the operating lever device. be able to.

  According to the seventh aspect of the present invention, the operated means is pulled to the operating position by pulling the wire to push the lock release button of the gas spring with lock provided in the telescopic leg of the chair to the operating position. It is possible to adjust the height, and when the wire is loosened, the lock release button returns to the inoperative position and the seat height is fixed so that the lock release button can be reset. Depending on the strength and stroke of the spring, it is possible to select the most suitable way to hang the wire on the operating lever.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1-6 shows a chair provided with the 1st Embodiment of this invention.
As shown in FIG. 1, the chair (1) includes a leg (4) having a plurality of radial leg rods (3) provided with a caster (2) at the tip. A vertically adjustable pedestal (5) is erected at the center of the leg (4), and a support base (6) is provided at the upper end of the pedestal (5).

  The front base of the pair of left and right back support rods (8) that support the backrest (7) is pivotally supported by the support base (6) with a support shaft (9) facing left and right. 7) and the back support rod (8) can be tilted backward by a reclining mechanism (not shown) provided in the support base (6).

  The front part of the seat body (10) disposed above the support base (6) is supported by the front part of the support base (6) with a pair of left and right support links (11) and (11). The rear part of the body (10) has a bearing piece (12) protruding upward from a portion near the front end of the front arm (8a) (only one of which is shown) of the left and right backrest support rods (8). In addition, the seat (10) is pivotally attached with the pivot (13) pointing in the left-right direction, and when the backrest (7) and the backrest support rod (8) are tilted backward, they move in conjunction with the back and bottom. It is supposed to be made.

  As shown in FIGS. 2 and 3, a rectangular parallelepiped for attaching an armrest strut (14) is provided behind the bearing piece (12) in the forward arm (8a) of the left and right backrest support rods (8). The mounting portion (15) is integrally formed so as to be continuous with the bearing piece (12).

  On the outer surface of the mounting portion (15), there is a portion bent by approximately 90 ° toward the inner side of the chair (1) at the lower end portion of the armrest strut (14) having a rhombus frame shape in which the side view is inclined forward. The lower end portion of the armrest strut (14) is fixed to the attachment portion (15) with two inner and rear bolts (not shown).

  An armrest (16) facing in the front-rear direction is provided at the upper end of the armrest support (14). Further, a recessed step portion (17) for forming a gap (S) between the upper end of the front support portion (14a) inclined forward in the armrest support post (14) and the front portion of the armrest (16). Is provided.

  The middle part in the left-right direction at the corner from the recessed step (17) in the armrest strut (14) to the front of the front strut (14a) is provided with a recessed portion (18) that is recessed backward. The housing (20) that accommodates the operation lever (19) is fitted from the front, and the housing (20) is fixed to the front column (14a) with two upper and lower mounting screws (21) and (21). Yes.

  The operating lever (19) has its operating portion (19a) at its distal end protruding forward from the front surface of the housing (20) and the front strut portion (14a), and its base end portion faces in the left-right direction. It is pivotally attached with a central axis (22). A wire hooking portion (23) is provided on one side surface of the intermediate portion of the operation lever (19).

  The wire hooking portion (23) has an arc shape whose center of curvature is an axis lined in the left-right direction perpendicular to the longitudinal direction of the operation lever (19) and the lower direction which is a guide direction of the wire (25) described later. The intermediate portion is provided with a bypass passage (24) that can bypass the wire (25) downward from the intermediate portion of the wire hooking portion (23).

  A laterally pin-shaped wire end member (26) fixed to one end of the wire (25) is locked to an intermediate portion of the housing (20), and the wire (25) is connected to an operation lever ( 19) After being hung on the wire hooking portion (23), it is inserted downward into the flexible outer tube (27) with one end fastened to the lower end of the housing (20). Yes.

  A Bowden cable (28) is formed by the wire (25) and the outer tube (27). The Bowden cable (28) has a concave groove (29) facing downward from the lower end of the housing (20) and provided in the center of the front surface of the armrest strut (14), and the lower end of the concave groove (29) is connected to the armrest strut (14 ) In order to communicate with the inner end of the portion bent inward along the front surface of the wire), and a left and right wire insertion hole (not shown) provided so as to penetrate the mounting portion (15) sequentially. Then, it is pulled out inward of the backrest support ridge (8), and is connected to various adjusting means which are provided below the seat body (10) and are operated means described later.

  The front of the armrest (14) accommodated the Bowden cable (28) with a substantially J-shaped cover (30) in front view with the lower end bent inward so as to be the same shape as the front. It is detachably mounted so as to cover the front opening of the concave groove (29).

  The operating lever (19) has a pin (31) projecting from its side surface floating in an arc hole (32) provided on the side wall (20a) of the housing (20) with the center axis (22) as the center of curvature. Within the possible range, it can be pivoted up and down around the mandrel (22), and is always located at the stop position shown in FIG. 3, and the operation part (19a) is indicated by an arrow in FIG. As shown in FIG. 4, by rotating upward, as shown in FIG. 4, the wire hooking portion (23) pulls the wire (25) upward to operate the adjusting means.

  When the hand is released from the operation lever (19), the wire (25) is built in the adjusting means or pulled back by a return spring (not shown) provided separately, and the operation lever (19) is shown in FIG. To the stop position shown in FIG.

  As shown in FIGS. 3 and 4, when the wire (25) is wound around the entire arc-shaped outer peripheral surface of the wire hooking portion (23) of the operation lever (19), the wire (25) comes into contact. The position of the most abutting portion (A) closest to the tip of the operating lever (19) is the end of the operating portion (19a) side of the operating lever (19) in the wire hooking portion (23). In this state, when the operation lever (19) is rotated upward, the wire (25) can be largely pulled by the wire hooking portion (23) as shown in FIG.

  However, as shown in FIGS. 5 and 6, the wire (25) is inserted into the bypass passage (24) of the wire hooking portion (23) of the operation lever (19), and almost half of the wire hooking portion (23) is inserted. When it is hung only on the top, the position of the most advanced contact part (A) is located approximately in the middle of the wire hooking part (23), and in this state, the control lever (19) is moved upward as shown in FIG. Even if it is rotated, the wire (25) is pulled slightly compared to the case shown in FIG.

  Therefore, the wire pulling amount with respect to the rotation angle of the operation lever (19) can be easily changed by simply changing the way of hooking the wire (25) in this way, so that the wire (25) can be pulled. As the operation means of various adjusting devices etc. (operated means) with different allowance and pulling strength etc., it can be widely applied, and between various adjusting devices with different pulling allowance and strength of the wire (25), It is possible to divert the operating lever device or to share the operating lever device.

  As the operated means, for example, as described in Japanese Patent Application Laid-Open No. 2004-49713 related to the applicant's application, the backrest (7) can be rotated by pulling the wire (25). And the angle adjustment device for the backrest (7), in which the rotation of the backrest (7) is stopped when the wire (25) is loosened, and also disclosed in JP-A-2006-109999. As shown in the figure, by pulling the wire (25), the lock release button of the lockable gas spring (not shown) provided in the telescopic pedestal (5) of the chair (1) is pushed to the operating position. The height of the seat (10) can be adjusted, and when the wire (25) is loosened, the unlocking button returns to the inoperative position and the height of the seat (10) is fixed. The height adjustment device for the seat can be used.

  When the operated means is the above-mentioned angle adjustment device for the backrest, since the operating stroke, that is, the wire pulling margin is large, the wire (25) is connected to the wire hooking portion in the operation lever (19) as shown in FIG. (23), when the operated means is the seat height adjusting device described above, the operating stroke, that is, the pulling margin of the wire is small, so the wire (25) is as shown in FIG. It is preferable that the operation lever (19) is inserted into the bypass passage (24) of the wire hooking portion (23) and is hung only on almost half of the wire hooking portion (23).

FIG. 7 shows a second embodiment of the present invention. Note that members having the same functions as those in the first embodiment are denoted by the same reference numerals as described above.
In this example, the base end of the operating lever (19) is pivotally attached to the lower surface of the seat body (10) with a central axis (22) facing in the front-rear direction, and the base end of the operating lever (19) and the tip From the three pins (50) facing the front-rear direction aligned with the longitudinal direction of the operation lever (19), maintaining an interval through which the wire (25) can be inserted, at an intermediate portion between the operation portion (19a) and the operation lever (19a) The wire end portion (23) is provided, and the wire end member (26) fixed to one end of the three pins (50) is located near the axis (22) on the lower surface of the seat body (10). By pulling the fastened wire (25) in different manners, the pulling amount of the wire (25) with respect to the rotation angle of the operation lever (19) can be easily changed.

  That is, when it is hung around the entire three pins (50) as shown by the solid line in FIG. 7, and when it is hung around only two or one pin (50), as shown by the imaginary line as well. Then, the position of the most advanced contact part (A) is displaced in the longitudinal direction of the operation lever (19), so that the pulling amount of the wire (25) with respect to the rotation angle of the operation lever (19) is changed. It is.

  Therefore, in the second embodiment, the same operation and effect as in the first embodiment, that is, widely applied as operation means of various adjusting devices having different pulling traction and pulling strength of the wire (25). In addition, the operation lever device can be diverted between the various adjusting devices with different pulling allowances and strengths of the wire (25), and the operation lever device can be shared. Can play.

The present invention is not limited to the first and second embodiments described above, and can be implemented in various modified forms within the scope of the claims.
For example, the operation lever (19) can be provided on the forward arm portion (8a) of the backrest support rod (8), the side surface of the support base (6), or the like.

It is a side view of a chair provided with a 1st embodiment of an operation lever device of the present invention. Similarly, it is the perspective view which looked at the armrest part from diagonally forward. Similarly, it is the expansion vertical side view which longitudinally cut the front upper part of the armrest support | pillar in the center. Similarly, it is an enlarged vertical sectional side view showing a state when the operation lever is pulled from the state shown in FIG. 3. Similarly, it is an aspect different from the aspect shown in FIG. 3, and is an enlarged longitudinal sectional side view showing a state when the wire is wound around the wire hanging portion. Similarly, it is an enlarged longitudinal sectional side view showing a state when the operation lever is pulled from the state shown in FIG. It is an expansion vertical front view of the right side part of the seat of a chair provided with 2nd Embodiment of the operating lever apparatus of this invention.

Explanation of symbols

(1) Chair
(2) Casters
(3) Footpad
(4) Leg
(5) pedestal
(6) Support base
(7) Backrest
(8) Back support
(8a) Front arm
(9) Support shaft
(10) Seat
(11) Support link
(12) Bearing piece
(13) Axis
(14) Armrest prop
(14a) Front strut
(15) Mounting part
(16) Elbow rest
(17) Recessed step
(18) Recessed part
(19) Control lever
(19a) Operation unit
(20) Housing
(20a) Side wall
(21) Mounting screw
(22) Center axis
(23) Wire hook
(24) Bypass passage
(25) Wire
(26) Wire end member
(27) Outer tube
(28) Bowden cable
(29) Concave groove
(30) Cover
(31) Pin
(32) Arc hole
(50) Pin
(A) Advanced contact part
(S) Gap

Claims (7)

A wire hook is provided in the middle of the control lever pivotally attached to a part of the chair and the control section is provided at the tip, and one end of the wire hook is near the control lever. The wire is fastened to a part of the chair, and the other end of the wire is connected to the operated means in the chair. In an operation lever device in a chair that pulls a wire and operates the operated means,
In the chair characterized in that the wire can be attached in a plurality of modes in which the most abutting portion closest to the tip of the operation lever with which the wire abuts is different in the longitudinal direction of the operation lever. Operation lever device.   The wire hooking portion has an arc shape with the center of curvature being an axis perpendicular to the longitudinal direction of the operation lever and the guide direction of the wire, and a bypass passage that can bypass the wire is provided at an intermediate portion thereof. The operation lever device in the chair according to claim 1.   2. The operating lever device for a chair according to claim 1, wherein the wire hooking portion is formed by a plurality of pins projecting in the longitudinal direction of the operating lever so as to maintain a space through which the wire can be inserted.   The operating lever device for a chair according to any one of claims 1 to 3, wherein a base end portion of the operating lever is pivotally attached to a lower part of a front end of the armrest of the chair with a shaft facing in the left-right direction.   The operation lever device for a chair according to any one of claims 1 to 3, wherein a base end portion of the operation lever is pivotally attached to a lower surface side portion of the seat of the chair with a shaft facing in a left-right direction.   The backrest angle adjustment device, wherein the operated means is capable of rotating the backrest by pulling the wire and stopping the rotation of the backrest by loosening the wire. The operation lever apparatus in the chair in any one of 1-5. By pulling the wire to be operated, the lock release button of the gas spring with lock provided in the telescopic leg of the chair is pushed to the operating position, allowing the seat height to be adjusted and the wire to be loosened. The operation lever device for a chair according to any one of claims 1 to 5, wherein the seat unlocking device is configured such that the unlocking button returns to the inoperative position to fix the seat height.

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