JP4707286B2 - Headrest mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure for a headrest of a chair .
[0002]
[Prior art]
There are various means for attaching another member to one member. Among them, as a general means used when it is desired to change the angle formed by one member and another member, that is, when it is desired to realize a mounting structure that can rotate about one end of the member as an axis, And those constituting a hinge mechanism. For example, a hinge as shown in FIG. 14 can be used to join the members together.
[0003]
When manufacturing furniture or the like, there is naturally a process of attaching one member to another member. And it is often considered that it is desirable to configure such that the angle formed between the members is variable, such as the relationship between the backrest of the chair product and the headrest. If an existing hinge mechanism such as the use of the hinge 7 shown in FIG. 14 is employed, the above requirement can be satisfied. However, it may hinder the design of the design, and further damage the product .
[0004]
[Problems to be solved by the invention]
An object of the present invention is to attach a headrest to a backrest portion of a chair so that the angle can be adjusted without impairing the quality of the product .
[0005]
[Means for Solving the Problems]
The mounting structure of the headrest according to the present invention is a mounting structure when the headrest is mounted on the backrest portion of the chair so as to be rotatable around the coaxial center through two mounting tools arranged on at least the same axis. The tool is provided on one of the backrest and the headrest, the shaft portion provided with a projecting portion on the main body having a substantially cylindrical outer periphery, and the outer periphery provided on the other side of the main body of the shaft portion. And a bearing portion having a recess for inserting the protruding portion into a substantially cylindrical main body, and at least one of the shaft portion and the bearing portion is formed on the shaft center. it is configured so as to be detachable from the corresponding backrest or the headrest along a substantially perpendicular direction against the body of the main body and the bearing portion of the shaft portion together, the protruding There has been exposed in a region between the backrest and the headrest in a state of being close so as to face the opposing surfaces of both are inserted into the recess, the tip of the protruding portion from the opposing surface of the body of the shaft portion A notch portion that protrudes toward the surface and whose projection amount is shorter than the length of the projecting portion is continuous with the opposing surface of the main body of the bearing portion and is notched over a certain angle region when viewed from the central axis direction. The relative rotation angle between the shaft portion and the bearing portion is regulated within a predetermined range by selectively contacting any one of the end faces forming a pair.
[0006]
In order not only to be able to take a posture suitable for office work, but also to be able to selectively take a posture suitable for rest and refresh, etc., the backrest and seat are interlocked and locked. The mounting structure for mounting the headrest on the backrest of a chair equipped with a locking mechanism includes torque required for relative rotation between the shaft portion and the bearing portion according to the degree of screwing of the screw inserted into the bearing portion. It is preferable to change the size of.
[0007]
The shaft portion or the bearing portion configured to be detachable is provided with an insertion end that protrudes in a substantially vertical direction with respect to the shaft center, and a backrest portion corresponding to the shaft portion or the bearing portion or The headrest is provided with an insertion port corresponding to the insertion end, and the shaft portion or the bearing portion and the backrest portion or the headrest can be attached and detached by inserting and removing the insertion end into the insertion port. As a result, the coupling portion can be concealed while the coupling between the shaft portion or the bearing portion and the backrest portion or the headrest is structurally stable. Therefore, it is more suitable for manufacturing furniture products and the like.
[0008]
In addition, for example, the bearing portion is provided with a hole that penetrates the outer wall to reach the recess in a direction substantially perpendicular to the shaft center, and a screw is inserted into the hole so that the tip of the screw is in the recess. If it is possible to make contact with the inserted protrusion, it is possible to set the strength of torque required for adjusting the angle formed between the backrest and the headrest . It is also possible to fix the angle formed between the backrest and the headrest .
[0009]
Alternatively, the bearing portion is provided with a hole that penetrates the outer wall to reach the recess in a direction substantially perpendicular to the shaft center, and a screw having a hollow female screw is inserted into the hole. The bearing portion is configured to be detachable from a backrest portion or a headrest corresponding to the shaft center along a direction substantially perpendicular to the shaft center , and the female screw is further screwed into another screw. When the screw is screwed in so that the tip of the other screw can be brought into contact with the protruding portion, the hole provided in the bearing portion is connected to the backrest portion or the headrest and the torque is set. Used for applications.
[0010]
[0011]
[0012]
[0013]
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 2 and 3 are a front view and a side view of a chair according to an embodiment of the present invention. This chair is made by supporting the backrest 2 and the seat 9 on the base leg 8, so that not only can it take a posture suitable for office work, but also a posture suitable for rest and refresh can be selected as appropriate. In order to make it possible to take the object, the elevating mechanism P for adjusting the height of the back seat, or the backrest portion 2 on the base leg 8 or between the base leg 8 and the backrest portion 2, the seat portion 9 or the like. And a locking mechanism Q that locks the seat portion 9 in conjunction with each other, a backrest upper tilting mechanism R that tilts only the upper portion of the backrest portion 2 for stretching, etc., and for selectively pressing the hipbone, etc. The main feature is that the lower tilting mechanism S is provided. In the configuration as described above, the present embodiment achieves the object of attaching the headrest 3 as the second member to the backrest portion 2 as the first member so that the angle can be adjusted.
[0015]
The fixture 1 used in this embodiment is shown in FIG. The fixture 1 is composed of two members, a bearing member 11 that functions as a bearing portion and a shaft member 12 that functions as a shaft portion, and constitutes a hinge mechanism by combining the two members. The fixture 1 is usually made of a rigid material such as aluminum die cast.
[0016]
As shown in FIG. 4, the bearing member 11 has an insertion end 112 provided with a screw hole 112 a that penetrates the outer wall of the bearing member 11 and reaches the recess 111 in a main body including the recess 111 having a substantially round hole shape. It sticks out. The inner surface on the inlet side of the recess 111 is partially cut away. When the bearing member 11 is viewed from the central axis direction of the recess 111, the notch 111a is provided over an angle of 210 degrees. Incidentally, a pin 113 is provided on the outer surface of the bearing member 11 in parallel with the insertion end 112. The pin 113 serves to fix the relative position between the bearing member 11 and the member when the bearing member 11 is attached to the member. In the present embodiment, two fixtures 1 are arranged on the left and right as will be described later. The bearing member 11 shown in FIG. 4 is a constituent element of the fixture 1 arranged on the right side for a person seated on a chair. With respect to the bearing member 11 which is a component of the fixture 1 arranged on the left side, the notch portion 111a has a shape that is just right and left reversed from the left in FIG.
[0017]
As shown in FIG. 5, the shaft member 12 is provided with a screw hole 122 a into which a screw can be screwed in a direction perpendicular to the central axis of the projecting portion 121 in a main body provided with a substantially cylindrical projecting portion 121. The insertion end 122 is protruded and provided. The protruding portion 121 is covered with a resin collar 121b. A thick portion 121a substantially corresponding to the shape of the cutout portion 111a is provided at the base of the protruding portion 121. When the shaft member 12 is viewed from the central axis of the protruding portion 121, the thick portion 121a is provided over an angle of just 180 degrees.
[0018]
When the protrusion 121 of the shaft member 12 is inserted into the recess 111 of the bearing member 11 to form a hinge mechanism, as shown in the cross-sectional view of FIG. 6, one end surface of the notch portion 111a and the thick portion 121a. The shaft member 12 and the bearing member 11 can rotate relative to each other with the protruding portion 121 as an axis within a range where the one end face does not come into contact. In other words, the rotation angle can be regulated within a predetermined range by contacting one end surface of the notch portion 111a and one end surface of the thick portion 121a. In the present embodiment, the shaft member 12 can rotate with respect to the bearing member 11 within a range of an angle of 30 degrees. The cross-sectional view of FIG. 6 is a view when the fixture 1 arranged on the right side for a person seated on the chair is viewed from the inside to the outside in the width direction of the chair.
[0019]
The backrest 2 of the chair of the present embodiment includes a lower backrest frame 22, an upper backrest frame 21, and a tension member 23 that is bridged between both the frames 21 and 22 via an elastic member (not shown). It will be. Then, as shown in FIG. 7, two through holes that penetrate the frame are located at the upper end portion of the backrest portion 2, that is, the upper end portion of the backrest upper frame 21 at a position that is targeted at the center line of the frame width. 211 is opened. The through hole 211 functions as an insertion port for inserting the insertion end 112 of the bearing member 11 described above. Incidentally, the pin hole 212 provided near the through hole 211 functions to fix the bearing member 11 by inserting the pin 113 provided at the lower part of the bearing member 11.
[0020]
The headrest 3 equipped in the chair of the present embodiment has been developed so as to be easy to manufacture and comfortable to use, and includes a frame 31 configured to have an open upper end, and a frame. And an elastic member 32 for supporting the head. As shown in FIG. 8, the frame 31 is substantially U-shaped, and is convex toward a direction that is substantially in front of the headrest user (person sitting on the chair). In the lower end portion of the frame 31, two through holes 311 are formed at positions that are targeted on the center line of the frame width. The through-hole 311 functions as an insertion port for inserting the insertion end 122 of the shaft member 12 described above. The position of the through hole 311 is determined according to the position of the through hole 211 provided in the above-described backrest upper frame 21 and the distance between the two insertion ends 112 and 122 of the fixture 1. The elastic member 32 is formed by tensioning a tension material on the frame 31, and in this embodiment, a double raschel knitted fabric formed in a bag shape is used as the tension material. That is, the headrest 3 is configured by covering the frame 31 with a double raschel knitted fabric formed in a bag shape.
[0021]
Hereinafter, the attachment procedure when attaching the headrest 3 to the backrest 2 will be described. First, the bearing member 11 is attached to the backrest upper frame 21. The insertion end 112 of the bearing member 11 is inserted into the through hole 211 provided in the backrest upper frame 21, and the pin 113 of the bearing member 11 is inserted into the pin hole 212. Next, the screw 4 is inserted into the through hole 211 from the inside of the backrest upper frame 21, and the screw 4 is screwed into the screw hole 112 a of the insertion end 112. The screw 4 used at this time is a female screw having a hollow shaft core. Then, the shaft member 12 is inserted into the bearing member 11. As a result of following the steps so far, the state shown in the cross-sectional view of FIG. 9 is obtained. Incidentally, the cross-sectional view is a view seen from the right side and the rear side of the chair for a person sitting on the chair. Subsequently, the male screw 5 corresponding to the dimension of the female screw is screwed into the hollow female screw hole 41 located at the axial center of the screw 4. The male screw 5 has a sufficient length, and its tip contacts the protruding portion 121 of the shaft member 12 when screwed into the female screw hole 41. The magnitude of friction between the tip of the male screw 5 and the collar 121b of the protruding portion 121 changes according to the degree of screwing of the male screw 5. That is, the magnitude of torque required for relative rotation between the bearing member 11 and the shaft member 12 changes. Therefore, the male screw 5 is screwed to such an extent that the chair user can change the angle of the headrest 3 by applying a sufficiently large force. The result of the steps up to this point is shown in the sectional view of FIG.
[0022]
The fixture 1 is attached to the left and right through holes 211 of the backrest upper frame 21 in the above-described procedure. What is important here is that the protruding direction of the protruding portion 121 of the shaft member 12, that is, the insertion direction of the shaft member 12 into the bearing member 11, is the opposite direction for the left and right fixtures 1. .
[0023]
FIG. 11 shows a procedure for attaching the headrest 3 to the backrest 2 via the attachment 1 attached to the backrest upper frame 21. The frame 31 of the headrest 3 is fitted from above so that the insertion ends 122 of the left and right shaft members 12 are passed through the two through holes 311. Thereby, the detachment of the shaft member 12 from the bearing member 11 is prevented. Thereafter, the screw 6 is inserted into the through hole 311, and the screw 6 is screwed into the screw hole 122 a of the insertion end 122. FIG. 12 is a cross-sectional view showing the results of the steps taken between steps. Thus, the frame 31 of the headrest 3 can be attached to the backrest upper frame 21. Finally, the above-described bag-like tension member 32 is placed on the frame 31 of the headrest 3 to complete the operation of attaching the headrest 3 to the backrest 2 of the chair. By covering the tension member 32, the screw 6 that fastens the frame 31 of the headrest 3 and the shaft member 12 is concealed.
[0024]
As already described, the fixture 1 is such that the shaft member 12 and the bearing member 11 rotate relative to each other with the projecting portion 121 of the shaft member 12 as the rotation axis, and therefore, as shown in FIG. The angle between the headrest 3 and the headrest 3 can be changed. In addition, the magnitude of the torque required to change the angle is appropriately adjusted by the male screw 5 inserted into the hole 112a of the bearing member 11, and when the head is placed, the headrest 3 is supported without moving. When the force is applied, the angle of the headrest 3 can be adjusted. Further, the range of change of the angle is restricted by the engagement of the notch portion 111a on the inner surface of the concave portion 111 and the thick portion 121a of the protruding portion 121. In this embodiment, the headrest 3 has an angle of 30 degrees. The angle can be changed.
[0025]
Therefore, according to the present embodiment, the direction of protrusion of the protrusion 121 of the one shaft member 12 and the direction of protrusion of the protrusion 121 of the other shaft member 12 are opposite to each other. Two fixtures 1 including the mechanism are interposed between the upper end of the backrest portion 2 and the headrest 3, and the headrest 3, the shaft member 12, the backrest portion 2, and the bearing member 11 are respectively connected to the protrusion 121. It is configured to be detachable along the insertion direction into the recess 111, in other words, along the direction substantially perpendicular to the axis of the rotation shaft. If it is such, the front-end | tip of the protrusion part 121 which is a rotating shaft will not be exposed, but it can be used conveniently for manufacture of the chair which is furniture products. Further, the shaft member 12 and the bearing member 11 are not separated without restricting the relative movement (in the width direction of the chair) between the backrest 2 and the headrest 3. Therefore, it is not necessary to make the shape of the backrest upper frame 21 or the frame 31 of the headrest 3 complicated. In addition, the fixture 1 constituted by the shaft member 12 and the bearing member 11 also has a relatively simple shape. In conclusion, it is possible to implement the mounting structure without increasing the manufacturing cost.
[0026]
Since the protrusion 121 of the shaft member 12 has a substantially cylindrical shape and the recess 111 of the bearing member 11 has a substantially round hole, the angle formed between the backrest 2 and the headrest 3 can be adjusted smoothly.
[0027]
The shaft member 12 and the bearing member 11 configured to be detachable are provided with insertion ends 122 and 112 that protrude in a substantially vertical direction with respect to the shaft center, and the backrest upper frame 21 and the headrest 3 are provided. The frame 31 is provided with through holes 211 and 311 which are insertion ports corresponding to the insertion ends 122 and 112, and the shaft members are inserted and removed by inserting and removing the insertion ends 122 and 112 into the through holes 211 and 311. 12 and the bearing member 11 and the member are configured so as to be detachable, the coupling portion is made while the coupling between the shaft member 12 or the bearing member 11 and the member is structurally stable. Can be concealed. Therefore, it is more suitable for manufacturing furniture products and the like.
[0028]
The bearing member 11 is provided with a screw hole 112a extending through the outer wall to reach the recess 111 in a direction substantially perpendicular to the axis, and the male screw 5 is inserted into the screw hole 112a. If it is made possible to make the tip of this can contact the protrusion 121 inserted into the recess 111, the strength of the torque required for adjusting the angle formed by the backrest 2 and the headrest 3 can be set. It will be a thing.
[0029]
Furthermore, the backrest upper frame 21 and the bearing member 11 are screwed by a screw 4 that is inserted into the screw hole 112a and has a hollow female screw with a shaft core. When the other male screw 5 is further screwed in and the tip of the male screw 5 can be brought into contact with the protruding portion 121, the screw hole 112 a provided in the bearing member 11 is connected to the backrest upper frame 21. It is used for two purposes: coupling and torque setting.
[0030]
If the attachment structure of the member comprised as mentioned above is employ | adopted when attaching the headrest 3 to the backrest part 2 of a chair product, a user can adjust the angle between the backrest part 2 and the headrest 3 arbitrarily. become able to.
[0031]
In addition, the concave portion 111 of the bearing member 11 is provided with a notched portion 111a in which the inner surface on the inlet side of the concave portion 111 is partially cut out over a certain angle region, and the protruding portion 121 of the shaft member 12 has the A thick portion 121a is provided at a position corresponding to the position of the cutout portion 111a over an angle region smaller than the cutout portion 111a. The relative rotation between the bearing member 11 and the shaft member 12 can be performed at a predetermined angle without providing a mechanism for restraining rotation by a relatively easy process of providing the notch portion 111a and the thick portion 121a. The range can be suppressed.
[0032]
The fixture 1 used to realize the member mounting structure according to the present embodiment can be screwed in a substantially vertical direction with respect to the substantially cylindrical protrusion 121 and the central axis of the protrusion 121. A screw member 122 having a screw hole 122a and functioning as the shaft portion; a concave portion 111 having a substantially round hole; and a screw extending through the outer wall in a direction substantially perpendicular to the central axis of the concave portion 111 and reaching the concave portion 111 It is good to comprise by the bearing member 11 provided with the hole 112a and functioning as the said bearing part.
[0033]
Further, the recess 111 of the bearing member 11 is provided with a notch portion 111a in which the inner surface on the inlet side of the recess 111 is partly cut out over a certain angular region, and the protrusion 121 of the shaft member 12 has the notch 111a. A thick portion 121a is provided in a position corresponding to the position of the portion 111a over an angle region smaller than the notch portion 111a, and the bearing member 11 minutes and the shaft member 12 are relatively rotated within a predetermined angle range. It may be configured as possible.
[0034]
The present invention is not limited to the embodiment described in detail above. The method of coupling the backrest or headrest with the shaft member 12 or the bearing member 11 is not necessarily limited to screwing.
[0035]
Other specific configurations of the respective parts are not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
[0036]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, a headrest can be attached to a chair backrest part so that angle adjustment is possible, without impairing the quality of a product.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a fixture used in an embodiment of the present invention.
FIG. 2 is a front view of a chair according to an embodiment of the present invention.
FIG. 3 is a side view of the same.
FIG. 4 is a plan view showing a bearing member used in the embodiment.
FIG. 5 is a plan view showing a shaft member used in the embodiment.
FIG. 6 is a longitudinal sectional view of the fixture.
FIG. 7 is a partial perspective view showing a backrest upper frame.
FIG. 8 is a plan view showing a headrest.
FIG. 9 is a longitudinal sectional view of a main part according to the present embodiment.
FIG. 10 is a longitudinal sectional view of a main part according to the present embodiment.
FIG. 11 is a diagram schematically illustrating a configuration of a headrest.
FIG. 12 is a longitudinal sectional view of a main part according to the present embodiment.
FIG. 13 is a diagram schematically showing effects obtained in the present embodiment.
FIG. 14 is a diagram illustrating a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Fixing tool 11 ... Bearing member 111 ... Recessed part 111a ... Notch part 112 ... Insertion end 112a ... Screw hole 12 ... Shaft member 121 ... Projection part 121a ... Thick part 122 ... Insertion end 122a ... Screw hole 2 ... Backrest part 21 ... Backrest upper frame 211 ... through hole 3 ... headrest 31 ... frame 311 ... through hole 4 ... screw 5 ... male screw 6 ... screw

Claims (6)

A mounting structure for mounting the headrest on the backrest portion of the chair so as to be rotatable about the coaxial center through two mounting tools arranged on at least the same axis,
The fixture is
A shaft portion provided on either the backrest portion or the headrest, the outer periphery of the main body having a substantially cylindrical shape and having a protruding portion;
A bearing portion provided with a recess for inserting the protruding portion into a main body having a substantially cylindrical shape whose outer periphery is substantially flush with the main body of the shaft portion;
And at least one of these shaft portions and bearing portions is configured to be detachable from a backrest portion or headrest corresponding to the shaft center along a substantially vertical direction,
Both the main body of the shaft portion and the main body of the bearing portion are exposed in a region between the backrest portion and the headrest in a state where the protruding portion is inserted into the concave portion and both facing surfaces are brought close to each other. And
A thick portion that protrudes from the opposing surface of the main body of the shaft portion toward the tip of the protruding portion and whose protruding amount is shorter than the length of the protruding portion is continuous with the opposing surface of the main body of the bearing portion, and is a central axis The relative rotation angle between the shaft portion and the bearing portion is regulated within a predetermined range by selectively contacting one of the end faces forming a pair of notches cut out over a certain angle region when viewed from the direction. A headrest mounting structure characterized by that. In order not only to be able to take a posture suitable for office work, but also to be able to selectively take a posture suitable for rest and refresh, etc., the backrest and seat are interlocked and locked. An attachment structure for attaching a headrest to a backrest portion of a chair having a locking mechanism,
The headrest mounting structure according to claim 1, wherein a magnitude of a torque required for relative rotation between the shaft portion and the bearing portion changes according to a degree of screwing of a screw inserted into the bearing portion. The headrest mounting structure according to claim 1, wherein the protruding portion has a substantially cylindrical shape, and the concave portion has a substantially round hole. The shaft portion or the bearing portion configured to be detachable is provided with an insertion end that protrudes in a substantially vertical direction with respect to the shaft center,
The backrest portion or headrest corresponding to the shaft portion or the bearing portion is provided with an insertion port corresponding to the insertion end,
The said shaft part or a bearing part, and a backrest part or a headrest are comprised so that attachment or detachment is possible by inserting / extracting the said insertion end in the said insertion port, The 1, 2 or 3 characterized by the above-mentioned. Headrest mounting structure. The bearing portion is provided with a hole extending through the outer wall to reach the recess in a direction substantially perpendicular to the shaft center,
The headrest attachment structure according to claim 1, 2, 3, or 4, wherein a screw is inserted into the hole so that a tip of the screw can be brought into contact with the protruding portion inserted into the recess. The bearing portion is provided with a hole extending through the outer wall to reach the recess in a direction substantially perpendicular to the shaft center,
By inserting a screw whose hollow core is a hollow female screw into the hole and screwing it, the bearing portion can be detached from the backrest or headrest corresponding to the shaft center along a substantially vertical direction. Configured to be,
5. The headrest mounting structure according to claim 1, wherein another screw is further screwed into the female screw so that a tip of the other screw can come into contact with the protruding portion.

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