TWI544915B - Chair - Google Patents

Description

chair

The present invention relates to a massage mechanism built into a chair.

In the prior art, when the user massages the back or the waist, the seat type massage machine in which the massage mechanism is incorporated in the backrest portion is used.

As the seat type massage machine, for example, there is a massage machine disclosed in Patent Document 1.

However, when a user who is sitting on an ordinary chair such as an office chair or a legless seat wants to massage the back or the waist, it is necessary to move to a seat type massager shown in Patent Document 1 provided elsewhere for massage. Therefore, it is very troublesome for the user.

In order to solve the above problem, for example, a chair in which a massage mechanism is incorporated in a backrest portion is disclosed in Patent Document 2.

[Previous Technical Literature] [Patent Document]

Patent Document 1: Japanese Laid-Open Patent Publication No. 2009-77755

Patent Document 2: Japanese Laid-Open Patent Publication No. 2006-296960

Referring to FIG. 2 and FIG. 3 of Patent Document 2, the chair described in Patent Document 2 is a chair having a massage function in which a switching mechanism is disposed in a backrest portion, wherein the switching mechanism is capable of not applying a massage effect. A mechanism for switching between a non-massage state and a state in which a massage effect is applied (massage state).

However, the chair is manually operated by the user to switch the non-massage state and the massage state, and thus it is very troublesome to use.

The present invention has been made in view of the above problems, and it is an object of the invention to provide a chair having a mechanism capable of easily abutting a massage mechanism housed inside a backrest portion with a user's back only when a massage operation is applied to a user's back. .

In order to achieve the above object, the following technical means are employed in the present invention.

A chair according to the present invention has a seat portion; a backrest portion disposed at a rear portion of the seat portion and configured to support a back of the user; and a back portion of the user seated in the backrest portion and seated on the seat portion A massage mechanism for applying a massaging operation, wherein a bracket is provided inside the backrest portion, the massaging mechanism is disposed on the bracket via a moving mechanism, and the moving mechanism is configured to allow the massaging mechanism to be built in the backrest portion The position in the middle moves to the front of the backrest portion and can be placed on the back of the user The location where the massage is performed.

Preferably, the moving mechanism is configured to move the massaging mechanism from a storage position accommodated inside the backrest portion to a surface position which is a position parallel to a surface layer of the backrest portion.

Preferably, the moving mechanism is constituted by a link mechanism for moving the massaging mechanism, and the driving unit is disposed on the bracket and configured to swing the link mechanism. The lever mechanism includes a first link member that is rotatably coupled to the massage mechanism at one end, and an intermediate portion coupled to the rotation shaft of the drive portion, and a second link member that is disposed in the vertical direction with the first link member And at a different position, and the intermediate portion is rotatably supported by the bracket, one end of which is rotatably coupled to the massage mechanism; and the swing link member is rotatably supported at one end in the first connection The other end of the rod member, and the other end is rotatably supported at the other end of the second link member.

Preferably, the first link member is formed as an L-shaped member in a side view, and one end of the L-shape is longer than the other end, and the one end is rotatably coupled to the lower side of the massage mechanism The curved portion of the L-shaped intermediate portion may be fixed to a rotating shaft disposed on the driving portion and supported by the shaft.

Preferably, the second link member is formed as an L-shaped member in a side view, and one end of the L-shaped body is longer than the other end, and the one end is rotatably coupled to the upper side of the massage mechanism. The curved portion of the L-shaped intermediate portion is rotatably supported on the bracket.

Preferably, the first link member and the second link member are capable of being from one end The position obliquely upward toward the rear of the bracket is swung to a position toward the front of the bracket.

Preferably, the first link member is fixed to the rotating shaft and the pivot point of the shaft is disposed between the pivot point supported by the lower side of the massaging mechanism and the pivot point supported by the pivot link member. The pivot point on which the second link member is rotatably supported on the bracket is disposed between a pivot point supported by the upper side of the massaging mechanism and a pivot point supported by the pivot link member.

Preferably, the swing link member is an elongated sheet material, and a length in the longitudinal direction of the sheet material is substantially the same as a height in a vertical direction of the massage mechanism, and the swing link member is parallel to a vertical direction of the massage mechanism.

Preferably, the link mechanism has one end of the swing link member positioned closer to the left-right direction than the other end, and one end of the second link member is located closer to the inner side in the left-right direction than the other end.

According to the chair of the present invention, it is possible to easily bring the massage mechanism housed inside the backrest portion into contact with the back only when a massage operation is applied to the back of the user.

1‧‧‧ Chair (office chair)

2‧‧‧s

3‧‧‧Backrest

4‧‧‧ head pillow

5‧‧‧Handrail

6‧‧‧Base

7‧‧‧Support members

8‧‧‧ feet

9‧‧‧ Wheels (rollers)

10‧‧‧cutting section

11‧‧‧ bracket

12‧‧‧First bracket member

13‧‧‧Second bracket member

14‧‧‧ engaging members

15‧‧‧Clocks

16‧‧‧ hole

17‧‧‧ Massage mechanism (backhoe device)

18‧‧‧Massage components

19‧‧‧Massage Department

20‧‧‧ left massage member

21‧‧‧ left arm member

22‧‧‧ upper left treatment component

23‧‧‧ Left lower treatment component

24‧‧‧ right massage member

25‧‧‧ right arm member

26‧‧‧ upper right treatment member

27‧‧‧ lower right treatment member

28‧‧‧Mobile agencies

29‧‧‧ linkage mechanism

30‧‧‧First link member

31‧‧‧End

32‧‧‧The other end

33‧‧‧bend (middle)

34‧‧‧ hole (one end)

35‧‧‧ hole (the other end)

36‧‧‧ holes (bending)

37‧‧‧ shaft pin (one end)

38‧‧‧ axle pin (the other end)

39‧‧‧Second link member

40‧‧‧End

41‧‧‧The other end

42‧‧‧bend (middle)

43‧‧‧ hole (one end)

44‧‧‧ hole (the other end)

45‧‧‧ holes (bending)

46‧‧‧ shaft pin (one end)

47‧‧‧ shaft support (the other end)

48‧‧‧Axis pin (bending part)

49‧‧‧Swing link member

50‧‧‧ one end (lower end)

51‧‧‧The other end (upper end)

52‧‧‧ hole (one end)

53‧‧‧ hole (the other end)

54‧‧‧ Drive Department

55‧‧‧Rotary axis

56‧‧‧Electric motor

57‧‧‧ Gearbox

58‧‧‧Support members on the left

59‧‧‧Support members on the right

60‧‧‧ hole (lower side of massage mechanism)

61‧‧‧ hole (upper side of massage mechanism)

62‧‧‧Table level

Figure 1 is a perspective view of a chair of the present invention.

Fig. 2 is a front perspective view showing the internal structure of the backrest portion.

Fig. 3 is a rear perspective view showing the internal structure of the backrest portion.

4 is a plan view showing the internal structure of the backrest portion.

Fig. 5 is a side view showing the operation of the moving mechanism when the massage mechanism is in the storage position.

Fig. 6 is a side view showing the operation of the moving mechanism when the massage mechanism is in the surface position.

Fig. 7 is a side view showing the operation of the moving mechanism when the massage mechanism is in the first massage position.

Fig. 8 is a side view showing the operation of the moving mechanism when the massage mechanism is in the second massage position.

Fig. 9 is a side view showing the operation of the moving mechanism when the massage mechanism is in the third massage position.

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

In addition, the embodiment described below is only one specific example of the present invention, and the configuration of the present invention is not limited to the specific example. Therefore, the technical scope of the present invention is not limited to the contents disclosed in the embodiment.

For example, in the present embodiment, the office chair 1 in which the moving mechanism 28 and the massage mechanism 17 are housed in the backrest portion 3 will be described as an example.

However, the office chair 1 is merely an example, and the present invention is also applicable to all chairs such as a legless chair. That is, the present invention is not particularly limited as long as it is an ordinary chair.

1 to 9 show the movement of the moving mechanism 28 and the massaging mechanism 17 accommodated in the backrest portion 3, ascending and descending.

In the following description, the left-right direction of FIG. 5 is referred to as the front-rear direction of the backrest portion 3 (office chair 1), and the vertical direction of FIG. 5 is referred to as the vertical direction of the backrest portion 3. The direction perpendicular to the paper surface in FIG. 5 is referred to as the left-right direction or the width direction of the backrest portion 3. These directions coincide with the direction seen by the user sitting on the office chair 1 shown in FIG.

First, the basic configuration of the chair 1 of the present invention will be described.

As shown in Fig. 1, a chair 1 (hereinafter sometimes referred to as an "office chair") according to the present invention has a seat portion 2 for a user to sit on, and is disposed at a rear portion of the seat portion 2 and is provided to be capable of supporting use. The backrest portion 3 of the back portion and a massage mechanism 17 that is built in the backrest portion 3 and applies a massaging operation to the back of the user seated on the seat portion 2 is provided with a bracket 11 inside the backrest portion 3.

The massage mechanism 17 is disposed on the bracket 11 via the moving mechanism 28, and the moving mechanism 28 is movable from the position built in the backrest portion 3 toward the front of the backrest portion 3.

Further, the office chair 1 of the present embodiment has a headrest 4 and an armrest portion 5, wherein the headrest 4 is erected on the upper portion of the backrest portion 3, and the armrest portion 5 is located on the left and right sides of the seat portion 2, and is seated on The user of the seat 2 can place the elbow on the armrest portion 5.

As shown in FIGS. 1 and 5, when the back of the user is not massaged, the massage mechanism 17 of the office chair 1 is housed inside the backrest portion 3. That is, the appearance of the office chair 1 of the present embodiment is substantially the same as that of the ordinary office chair 1.

Hereinafter, the office chair 1 of the present invention will be described in detail.

The seat portion 2 is a rectangular member having a width sufficient to support the buttocks of the seated user from below, and is formed using a cushioning material.

As shown in Fig. 1, a pair of armrest portions 5 capable of placing a user's elbow are provided at both end portions of the seat portion 2 in the left-right direction. Further, a base 6 is provided at a lower portion of the seat portion 2, and the base 6 supports the seat portion 2 with respect to the ground so that the seat portion 2 is positioned above the floor.

The base 6 is composed of a support member 7 and a plurality of legs 8, and the support member 7 supports the seat portion 2 from below, and the plurality of legs 8 are radially provided from the support member 7 in a substantially horizontal direction or slightly downward. The front end of each leg 8 is provided with a roll 9 (a caster) that is freely rotatable.

The backrest portion 3 disposed behind the seat portion 2 supported by the base 6 is a plate-like member having a certain thickness, which has an area sufficient to support the back and waist of the user, and is formed to be long in the up-and-down direction when viewed from the front. The shape of the backrest portion 3 is substantially rectangular, and the backrest portion 3 is formed of a cushioning material so that the user is comfortable. Further, on the backrest portion 3, a headrest 4 is erected upward from the upper portion thereof.

Further, it is preferable to provide a reclining mechanism in the backrest portion 3 so that the user can tilt the upper body (back) backward and relax.

A bracket 11 (described later in detail) and a massaging mechanism 17 are provided inside the backrest portion 3, wherein the bracket 11 can fully support the back of the user, and the massaging mechanism 17 is used for the back to the waist of the user seated on the seat portion 2. Apply a kneading or tapping, or vibration or other massage action.

In addition, at the surface level 62 of the backrest portion 3 (the back and waist of the user) The lower side of the surface on which the portion abuts is formed with a substantially rectangular cutout portion 10 when viewed from the front, and the cutout portion 10 has an area capable of moving the massaging mechanism 17 accommodated in the backrest portion 3 to the front of the surface layer 62. That is, the area of the notch portion 10 is larger than the size of the massage mechanism 17 when viewed from the front.

As shown in FIGS. 2 to 9, the bracket 11 disposed inside the backrest portion 3 is a member disposed inside the backrest portion 3, and the lower end portion of the bracket 11 is pivotally supported at the rear of the seat portion 2 or the rear portion of the base 6, and is Set to extend diagonally rearward.

The bracket 11 is a rectangular frame that is long in the vertical direction when viewed from the front, and is formed by arranging a plurality of rod-shaped members such as a metal pipe or an angle material.

Specifically, the bracket 11 is provided with a first bracket member 12 and a second bracket member 13 in which the first bracket member 12 is disposed with a pair of left and right and is long in the up and down direction, and the second bracket member 13 is disposed in the left and right direction. At the upper end portion and the lower end portion of the first bracket member 12. The length of the second bracket member 13 is shorter than that of the first bracket member 12. Further, in the present embodiment, two second bracket members 13 are disposed at the upper end portion and the lower end portion of the first bracket member 12, respectively.

Further, an engaging member 14 that engages with a moving mechanism 28 (described in detail later) is provided on the inner side in the vertical direction of the first bracket member 12 in the vertical direction. The length of the engaging member 14 in the left-right direction is a predetermined length, and the engaging piece 15 that rotatably supports the moving mechanism 28 is provided at the front end (the protruding end inward in the left-right direction).

The engaging piece 15 is a substantially square plate material and is configured as a plate material. The plane faces the up-and-down direction, and a hole 16 for rotatably pivoting the mechanism 28 is formed on the front side of the plane.

The massage mechanism 17 is disposed between the intermediate portion and the lower portion of the holder 11 in the vertical direction via the moving mechanism 28.

The massage mechanism 17 is a hatchback device, and has a pair of right and left massage members 18 and a massage portion 19 that operates the pair of massage members 18. The massage member 18 provided on the left side is referred to as "left side massage member 20", and the massage member 18 disposed on the right side is referred to as "right side massage member 24". The left side massage member 20 and the right side massaging member 24 are respectively provided at a predetermined interval in the left-right direction.

Further, in the present embodiment, the massage portion 19 of the massage mechanism 17 is one of the link members constituting the link mechanism 29 (parallel link mechanism) described below.

As shown in FIGS. 2 and 3, the left side massage member 20 has a left arm member 21 that protrudes from the massage portion 19 side toward the user side (toward the front side). The protruding end (front end) of the left arm member 21 is protruded in two directions of upward and downward directions, and the treatment member (the upper left treatment member 22 and the lower left treatment member 23 are disposed at the upper front end portion and the lower front end portion, respectively) after the bifurcation. ).

Further, similarly to the left massage member 20, the right massage member 24 also has a right arm member 25 that protrudes from the massage portion 19 side toward the user side (toward the front). The protruding end (front end) of the right arm member 25 is protruded in two directions of upward and downward directions, and the treatment member is disposed on the upper end portion and the lower end portion of the bifurcation (the upper right treatment member 26 and the lower right application) Therapeutic member 27).

When the massage mechanism 17 performs an operation of bringing the left arm member 21 and the right arm member 25 toward or away from each other, the left upper treatment member 22 and the right upper treatment member 26 are close to or away from each other in the left-right direction, or the left lower treatment member 23 and the lower right treatment are applied. The members 27 are close to or away from each other in the left-right direction. By this approaching or moving away, the back and the waist (the treatment part) can be sandwiched between the left and right left and right treatment members 22 and 26 and the lower left and right treatment members 23 and 27, and the kneading massage can be performed.

Further, in the present embodiment, the massage mechanism 17 has been described as an example of the reclining device. However, the massage mechanism 17 can be applied to the back and the waist (for example, by rotating the treatment member to perform the massage operation). The device or the device that expands and contracts the balloon to perform the massage operation is not particularly limited.

Next, the moving mechanism 28 which is a feature of the present invention will be described in detail based on the drawings.

The moving mechanism 28 is configured to be able to move the massage mechanism 17 from a position built in the backrest portion 3 (the bracket 11) to the front of the backrest portion 3 and to massage the back of the user.

Further, the moving mechanism 28 is configured to be able to move the massaging mechanism 17 from a storage position (described later in detail) accommodated inside the backrest portion 3 to a surface layer 62 of the backrest portion 3 (a surface that abuts the back and waist of the user) The position of the arrangement is the surface position (details are described later).

Further, when the structure of the moving mechanism 28 is described, in the respective drawings, a part of the arrangement position or structure of each member is omitted or depicted more. Easy to view.

For example, in the illustrations of FIGS. 2 to 9, the backrest portion 3 indicates the configuration of the moving mechanism 28, the bracket 11 and the massaging mechanism 17 therein, and the backrest portion 3 (surface level 62) normally disposed outside the bracket 11 is omitted. The representation of the components. In addition, in FIGS. 5 to 9, the members constituting the moving mechanism 28 are appropriately drawn so as to easily display the partial structure of the moving mechanism 28.

That is, the configuration drawing showing the internal mechanism of the backrest portion 3 in the office chair 1 of the present invention may be different from the configuration of the internal mechanism of the physical object.

The moving mechanism 28 is composed of a link mechanism 29 for moving the massage mechanism 17, and a drive mechanism 54 for arranging the lower portion of the bracket 11 for swinging the link mechanism 29.

The link mechanism 29 is a parallel link mechanism having a first link member 30, a second link member 39, and a swing link member 49, and one end 31 of the first link member 30 is rotatably coupled to the massaging mechanism 17 On the lower side, the intermediate portion 33 is coupled to the rotating shaft 55 of the driving portion 54; the second link member 39 and the first link member 30 are disposed at different positions in the vertical direction, and the intermediate portion 42 is rotatably supported by the bracket at the intermediate portion 11 and an end 40 is rotatably coupled to the upper side of the massaging mechanism 17; one end 50 of the swing link member 49 is rotatably supported at the other end 32 of the first link member 30, and the other end 51 is rotatably The shaft is supported on the other end 41 of the second link member 39.

Specifically, the first link member 30 is disposed at a lower portion of the bracket 11 and disposed in a pair in the left-right direction of the pair of right and left first bracket members 12 .

The first link member 30 is a plate material formed in an L-shape in a side view, and has one end 31 longer in length than the other end, and the one end 31 is rotatably coupled to the lower side of the massaging mechanism 17 so as to be pivotally about the left-right direction. . Further, the other end 32 is rotatably coupled to one end 50 of the following swing link member 49 so as to be axially rotatable about the left-right direction.

At one end 31 of the first link member 30, a hole 34 for supporting the shaft on the lower side of the massaging mechanism 17 is formed. After the hole 34 is aligned with the hole 60 formed on the lower side of the massaging mechanism 17 (massage portion 19), the shaft pin 37 is fitted. The hole 34 in which the shaft pin 37 is fitted becomes a pivot point A of one end of the first link member 30.

On the other hand, at the other end 32 of the first link member 30, a hole 35 for pivotally supporting one end 50 of the link member 49 is formed. The shaft pin 38 is fitted after the hole 35 is aligned with the hole 52 formed at one end 50 of the swing link member 49. The hole 35 in which the shaft pin 38 is fitted becomes the pivot point B of the other end of the first link member 30.

Further, a hole 36 is formed in the intermediate portion 33 of the L-shaped first link member 30, that is, the curved portion 33, and the rotation shaft 55 disposed in the drive portion 54 penetrates the hole 36. The first link member 30 is rotated about the axis of the rotation shaft 55 as the rotation shaft 55 rotates by fixing the rotation shaft 55 to the hole 36 of the bending portion 33 and preliminarily supporting it. The hole 36 through which the rotating shaft 55 passes is the pivot point C of the curved portion 33 of the first link member 30.

That is, in the first link member 30, the pivot point 55 is fixed to the pivot shaft C, and the pivot point C of the shaft support is disposed at the pivot point A of the shaft supporting the lower side of the massaging mechanism 17 and the pivot point of the shaft supporting the end of the swing link member 49. Between B.

Thereby, the first link member 30 can swing around the axis of the rotation shaft 55 (around the shaft fulcrum B) from the one end 31 toward the rear of the bracket 11 obliquely upward to a position facing the front of the bracket 11.

A pair of right and left second link members 39 are disposed above the first link member 30.

The second link member 39 is an intermediate portion in the vertical direction of the bracket 11 , and a pair of left and right first bracket members 12 are disposed on the inner side in the left-right direction.

Like the first link member 30, the second link member 39 is also a plate material formed in an L-shaped side view, the length of one end 40 being longer than the other end 41, and the one end 40 is rotatable about the axis in the left-right direction The ground is coupled to the upper side of the massage mechanism 17. Further, the other end 41 is rotatably coupled to the other end 51 of the swing link member 49 described below about the axis in the left-right direction.

That is, the shape of the second link member 39 is substantially the same as that of the first link member 30.

On the other hand, the one end 40 of the second link member 39 is located closer to the inner side in the left-right direction than the other end 41, which is different from the shape of the first link member 30.

At one end 40 of the second link member 39, a hole 43 for the upper side of the shaft massage mechanism 17 is formed. The shaft pin 46 is fitted after the hole 43 is aligned with the hole 61 formed on the upper side of the massaging mechanism 17. The hole 43 in which the shaft pin 46 is fitted serves as a pivot point D at one end of the second link member 39.

On the other hand, at the other end 41 of the second link member 39, a hole 44 for pivoting the other end 51 of the link member 49 is formed. Aligning the hole 44 with the hole 53 formed at the other end 51 of the swing link member 49 The shaft pin 47 is inserted later. The hole 44 in which the shaft pin 47 is fitted becomes the pivot point E of the other end of the second link member 39.

Further, a hole 45 for engaging the engaging piece 15 of the engaging member 14 (the bracket 11) is formed in the intermediate portion 42 of the L-shaped second link member 39, that is, the curved portion 42. The shaft pin 48 is fitted after the hole 45 is aligned with the hole 16 formed in the engaging piece 15.

The hole 45 of the bent portion 42 and the hole 16 of the engaging piece 15 are rotatably pivoted by the shaft pin 48, whereby the second link member 39 can be rotated about the axis of the shaft pin 48. The hole in which the shaft pin 48 is fitted becomes the pivot point F of the curved portion 42 of the second link member 39.

That is, in the second link member 39, the shaft fulcrum F of the engaging piece 15 is disposed at the pivot point D axially supported on the upper side of the massaging mechanism 17, and the other end 51 of the swing link member 49 is axially supported. Between the pivot points E on the upper.

Further, the pivot point F of the curved portion 42 of the second link member 39 is located substantially directly above the pivot point C of the curved portion 33 of the first link member 30, and the second link member 39 is substantially the same as the first link member 30. Rotate in the same way.

That is, the second link member 39 can swing around the axial center of the shaft pin 48 fitted in the curved portion 42 (the engaging piece 15) from the one end 40 toward the rear obliquely upward position of the bracket 11 to face the front of the bracket 11. s position.

A pair of right and left swing link members 49 are disposed between the second link member 39 and the first link member 30.

The swing link member 49 is disposed with a pair of the other end 32 of the first link member 30 and the other end 41 of the second link member 39.

The swing link member 49 is an elongated sheet material having a length of the sheet The length of the direction is substantially the same as the height between the pivot point A and the pivot point D in the vertical direction of the massaging mechanism 17, and the swing link member 49 is disposed in parallel with the vertical direction of the massaging mechanism 17.

On one end 50 (lower end) of the swing link member 49, a hole 52 for axially supporting the other end 32 of the first link member 30 is formed. As described above, the shaft is supported on the other end 32 of the first link member 30 (shaft fulcrum B) by inserting the shaft pin 38 in the hole 52.

On the other hand, at the other end 51 (upper end) of the swing link member 49, a hole 53 for pivotally supporting the other end 41 of the second link member 39 is formed. As described above, by fitting the shaft pin 47 in the hole 53, the shaft is supported on the other end 41 of the second link member 39 (shaft fulcrum E).

Further, as shown in FIG. 4, one end 50 of the swing link member 49 is located closer to the inner side in the left-right direction than the other end 51, and the other end 32 of the first link member 30 is embedded in plan view. The difference in the width direction of the other end 41 of the two link members 39 (the deviation of the pivot point B from the width direction of the shaft fulcrum E).

That is, the swing link member 49 can move from the intermediate portion of the holder 11 toward the lower side (a position overlapping the first holder member 12 in the side view) along the upper and lower (length) direction of the holder 11.

Thereby, when the rotation shaft 55 of the drive unit 54 rotates, the first link member 30 of the link mechanism 29 that is axially supported on the lower side of the massage mechanism 17 swings about the axis of the rotation shaft 55. At the same time, the second link member 39 whose shaft is supported on the upper side of the massage mechanism 17 is swung around the axis of the shaft pin 48 fitted in the engaging piece 15.

Further, the swing link member 49 whose shaft is supported by the first link member 30 and the second link member 39 swings from the intermediate portion in the up and down direction of the bracket 11 toward the lower rear side.

In this manner, by the swinging of the first link member 30, the second link member 39, and the swing link member 49, the massage mechanism 17 is maintained in a horizontal state while moving from the lower side toward the front upper side, that is, from the backrest portion. The inside of the 3 moves toward the front of the surface level 62.

At this time, the pivot point A and the pivot point D move around the axis of the rotation shaft 55 from the rear of the bracket 11 toward the front. On the other hand, the pivot point B and the pivot point E move around the axis of the rotation shaft 55 from the front side of the bracket 11 toward the rear.

Further, the link mechanism 29 is such that one end 50 of the swing link member 49 is located closer to the inner side in the left-right direction than the other end 51, and one end 40 of the second link member 39 is located closer to the inner side in the left-right direction than the other end 41, thereby The first link member 30, the second link member 39, the swing link member 49, and the massage mechanism 17 (acting of the link member) do not interfere with each other when rotated.

A drive unit 54 that swings the link mechanism 29 is disposed below the link mechanism 29.

The driving portion 54 is composed of a rotating shaft 55 for swinging the link mechanism 29, a motor 56 for generating a rotational driving force, and a gear box 57 for transmitting the generated rotational driving force to the rotation. The shaft 55 rotationally drives the rotating shaft 55.

The motor 56 disposed at the lower end portion of the bracket 11 is disposed such that the rotation drive shaft faces the left-right direction, and the rotation drive shaft (not shown) protrudes to the left. A drive gear (not shown) is attached to the rotary drive shaft. On the other hand, the rotation shaft 55 is disposed behind the rotation drive shaft of the motor 56, and is parallel to the rotation drive shaft, and a driven gear (not shown) is attached to the left end side of the rotation shaft 55. The moving gear meshes with the drive gear. The driven gears and the drive gears are built in the gear case 57, and the rotational driving force of the motor 56 is transmitted to the rotating shaft 55 via these.

The drive unit 54 is supported by the lower portion of the bracket 11 via a pair of support members 58 and 59 disposed at the lower portion of the bracket 11.

The support members 58 and 59 are members which are formed into a predetermined shape by press working or the like, and are disposed so as to protrude forward from the lower portion of the holder 11 .

The support member 58 on the left side supports the gear case 57 and the motor 56. Further, the left side of the rotating shaft 55 is supported by a gear case 57, and a bearing (not shown) that rotatably supports the rotating shaft 55 is fitted in the supporting point. On the other hand, the support member 59 on the right side supports the rotation shaft 55 and the motor 56, and a bearing (not shown) that rotatably supports the rotation shaft 55 is fitted to the support point of the rotation shaft 55.

Next, five postures (the posture of the storage position, the posture of the surface position, the posture of the first massage position, and the posture of the second massage position) realized by the link mechanism 29 as the above-described moving mechanism 28 are used with reference to FIGS. 5 to 9 . The posture of the third massage position), in other words, the operation of the chair 1 of the present invention will be described.

As shown in Figure 5, in the side cross-sectional view, the starter before starting the swing The structure 29 and the massaging mechanism 17 refer to a position accommodated inside the holder 11 as a housing position.

As shown in Fig. 6, in the side cross-sectional view, the position at which the lower left treatment member 23 and the lower right treatment member 27 of the massage mechanism 17 abut against the surface layer 62 is referred to as a surface position by the link mechanism 29 that starts swinging.

As shown in Fig. 7, in the side cross-sectional view, the position of the left and right lower sides and the left and right upper side of the massage members 17 from the surface layer 62 is referred to by the link mechanism 29 that is swinging. It is the first massage position (upper position).

As shown in Fig. 8, in the side sectional view, the massage mechanism 17 is protruded from the surface layer 62 by the link mechanism 29 that is swinging (the left and right lower sides of the massage mechanism 17 and the left and right upper side treatment members 22, 23) The position where 26, 27 is further protruded from the surface level 62 is the second massage position (middle position).

As shown in FIG. 9, in a side cross-sectional view, the position of the massage mechanism 17 protruding from the surface level 62 and moving to the lower portion of the surface layer 62 (the backrest portion 3) is referred to as the third massage position by the link mechanism 29 that is swinging. (lower position).

By the moving mechanism 28, the massaging mechanism 17 can be smoothly moved between the above five positions or postures.

First, as shown in FIG. 5, at the storage position, the one ends 31, 40 of the first link member 30 and the second link member 39 face upward obliquely rear side, and the other ends 32, 41 face upward oblique front side. On the other hand, the swing link member 49 is positioned in the up and down direction on the front side spaced apart from the bracket 11 by a predetermined distance. And at the same height as the massage mechanism 17.

Thus, when the L-shaped first link member 30 and the second link member 39 are vertically positioned downward, the pivot point A and the pivot point B are both present on a substantially horizontal line in the front-rear direction. Further, the pivot point D and the pivot point E are also present on a substantially horizontal line in the front-rear direction.

On the other hand, when the swing link member 49 is positioned substantially vertically, the other end (the pivot point E) is positioned slightly forward of one end thereof (the pivot point B).

At the storage position, the massage mechanism 17 is placed at a position overlapping the bracket 11 in a side view by the link mechanism 29 that is compactly housed. That is, the massage mechanism 17 at the storage position is completely housed inside the backrest portion 3.

In the moving mechanism 28 in the above-described storage position, when the motor 56 is rotated in the normal rotation direction, the first link member 30 is rotated about the axis of the rotation shaft 55, and the posture of the link mechanism 29 is shifted from the storage position to Surface location.

Next, as shown in FIG. 6, in the surface position, the one ends 31, 40 of the first link member 30 and the second link member 39 are more toward the oblique rear side than at the receiving position, and the other end 32, 40 is more inclined toward the lower front side than when it is in the accommodating position. On the other hand, the swing link member 49 is positioned in the vertical direction at a front side spaced apart from the bracket 11 by a predetermined distance, and is located slightly below the massage mechanism 17.

Thus, when the L-shaped first link member 30 and the second link member 39 are convex downward and are rotated forward, the pivot point A is positioned above the pivot point B by a predetermined distance, and the pivot point D Position at the pivot point E Above the specified distance.

On the other hand, when the swing link member 49 is moved downward by the first link member 30 and the second link member 39, the other end (the pivot point E) is positioned slightly forward of one end thereof (the pivot point B) s position.

At the surface position, the massage mechanism 17 is slightly protruded from the bracket 11 toward the front upper side by the link mechanism 29 that starts swinging, and the left and right lower treatment members 23 and 27 protrude from the surface layer 62.

As described above, the left and right lower treatment members 23 and 27 projecting from the front surface layer 62 abut against the waist of the user resting on the backrest portion 3, and can support the waist portion. Therefore, the position of the surface layer may be considered as the "waist support position" for realizing the above-described posture of supporting the upper body of the user from the back side.

In the moving mechanism 28 at the above-described surface position, when the motor 56 is further rotationally driven in the forward rotation direction, the one end 31 of the first link member 30 is oscillated about the axis of the rotation shaft 55 to be located on the obliquely upper side of the bracket 11 The posture of the link mechanism 29 is shifted from the surface position to the first massage position.

As shown in FIG. 7, in the first massage position, the one ends 31, 40 of the first link member 30 and the second link member 39 are substantially overlapped with the vertical direction of the holder 11 (substantially parallel to the vertical direction of the holder 11). The other end 32, 41 is located at a position perpendicular to the vertical direction of the holder 11 (a position protruding forward in the horizontal direction).

On the other hand, the swing link member 49 is located at the front side of the bracket 11 and is narrower and lower downward than the distance between the brackets 11 at the time of the surface position, and the other end is at the position with the massage mechanism 17. Up and down direction The position where the spaces are roughly overlapped.

As described above, when one end 31 of the L-shaped first link member 30 and one end 40 of the second link member 39 are in a substantially vertical position (the other end is in a substantially horizontal position), the pivot point A and the pivot point C In the straight line in which the vertical direction is substantially the same, the pivot point D and the pivot point F are substantially the same straight line in the vertical direction. In other words, the pivot point A, the pivot point D, the pivot point C, and the pivot point F are substantially the same straight line in the vertical direction.

Further, the front and rear of the pivot point B and the pivot point C in the horizontal direction are substantially on the same straight line, and the front and rear of the pivot point E and the pivot point F in the horizontal direction are substantially on the same straight line.

On the other hand, when the swing link member 49 moves downward, the other end 51 (the pivot point E) is positioned slightly forward of the one end 50 (the pivot point B).

In the first massage position, the massage mechanism 17 is positioned at a position slightly protruding from the front upper side of the bracket 11 by the swinging link mechanism 29, and the left and right lower sides and the left and right upper side treatment members 22, 23, 26, 27 Prominent from the table level 62.

As described above, the left and right lower sides and the left and right upper side of the treatment members 22, 23, 26, and 27 protruding from the surface layer 62 are in a state of being in contact with the waist and the back of the user resting on the backrest portion 3, thereby being able to Massage the waist and back.

In the moving mechanism 28 in the first massage position described above, when the motor 56 is further rotated in the forward rotation direction, the first link structure One end 31 of the member 30 is swung around the axis of the rotation shaft 55 to a position on the front side and the lower side of the holder 11, and the posture of the link mechanism 29 is shifted from the first massage position to the second massage position.

As shown in FIG. 8, in the second massage position, the one ends 31, 40 of the first link member 30 and the second link member 39 are perpendicular to the vertical direction of the holder 11 (the horizontal direction is protruding toward the front) The other ends 32 and 41 are substantially overlapped with the vertical direction of the holder 11 (substantially parallel to the vertical direction of the holder 11).

On the other hand, the swing link member 49 is substantially overlapped with the vertical direction of the bracket 11 (substantially parallel to the vertical direction of the bracket 11), and is the other end 32 of the first link member 30 and the second link member 39. The other end 41 becomes substantially the same straight line.

As described above, when one end 31 of the L-shaped first link member 30 and one end 40 of the second link member 39 are in a substantially horizontal state (the other end is in a substantially vertical position), the pivot point A and the pivot point C The front and rear directions in the horizontal direction are on substantially the same straight line, and the pivot point D and the pivot point F are in substantially the same straight line in the horizontal direction.

Further, the pivot point B and the pivot point C are substantially the same on the straight line in the vertical direction, and the pivot point E and the pivot point F are substantially the same on the straight line in the vertical direction. That is, the pivot point B, the pivot point C, the pivot point E, and the pivot point F are substantially the same straight line in the vertical direction.

In the second massage position, the massage mechanism 17 is positioned at a position protruding toward the front of the holder 11 by the swinging link mechanism 29, and the treatment members 22, 23, 26, 27 on the left and right lower sides and the upper left and right upper sides are from the surface layer. Face 62 stands out.

As described above, the left and right lower sides and the left and right upper side treatment members 22, 23, 26, and 27 which are largely protruded from the front surface portion 62 are in contact with the waist portion of the user who is resting on the backrest portion 3, and the massage operation can be applied to the waist portion or the like. .

In the moving mechanism 28 at the second massage position, when the motor 56 is further rotated in the normal rotation direction and driven, the one end 31 of the first link member 30 is swung around the axis of the rotation shaft 55 to the oblique direction of the bracket 11. At the position on the lower side of the front side, the posture of the link mechanism 29 is shifted from the second massage position to the third massage position.

As shown in FIG. 9, in the third massage position, the one ends 31, 40 of the first link member 30 and the second link member 39 are located slightly obliquely downward toward the front in the horizontal direction, and the other ends 32, 41 are provided. It is located at a position obliquely rearward and downward toward the vertical direction of the bracket 11.

On the other hand, the swing link member 49 is substantially overlapped with the vertical direction of the holder 11 (substantially parallel to the vertical direction of the holder 11), and becomes the other end 32 and the second link member of the first link member 30. The other end 41 of 39 is substantially the same straight line. At this time, the swing link member 49 is slightly moved upward as compared with the second massage position.

As described above, when one end 31 of the L-shaped first link member 30 and one end 40 of the second link member 39 are slightly inclined downward toward the front, the pivot point A and the pivot point B are horizontally The front and rear of the direction are substantially the same straight line, and the pivot point D and the pivot point E are substantially the same on the straight line in the horizontal direction.

In addition, the swing link member 49 is in five positions (housing position, table) Among the layer position, the first massage position, the second massage position, and the third massage position, only the vertical direction is moved, and the posture in the front-rear direction is hardly changed. That is, the swing link member 49 keeps the posture of the massage mechanism 17 in the horizontal direction at all times.

In the third massage position, the massage mechanism 17 is moved to the lower side of the front side of the holder 11 by the link mechanism 29 that is swinging, and the left and right lower side and the left and right upper side treatment members 22, 23, 26, 27 It is then located on the underside of the backrest portion 3.

As described above, the left and right lower sides and the left and right upper side treatment members 22, 23, 26, and 27 which are largely protruded on the lower side of the backrest portion 3 abut against the lower waist portion (near the buttocks) of the user of the backrest portion 3, and A massage action can be applied to the lower waist.

Further, when the massage mechanism 17 is housed inside the backrest portion 3 (for example, when returning from the state of FIG. 9 to the state of FIG. 5), the motor 56 is rotated in the reverse direction, so that the first link member 30 swings rearward. When the first link member 30 swings rearward, the second link member 39 also swings, and the massage mechanism 17 is housed inside the backrest portion 3 (the bracket 11). As a result, the link mechanism 29 (moving mechanism 28) shifts from the third massage position to the storage position via the second massage position, the first massage position, and the surface position.

In other words, in the chair 1 of the present embodiment, by rotating the motor 56 in the forward direction, the link mechanism 29 can be shifted from the storage position to the third massage position, and the motor 56 can be reversely rotated to reverse the operation of each member. The link mechanism 29 can be shifted from the third massage position to the storage position.

As described above, the chair 1 of the present embodiment can easily abut the massage mechanism 17 housed inside the backrest portion 3 against the back when the massage operation is applied to the back of the user. Further, the chair 1 of the present embodiment has a simple structure, and can swing the moving mechanism 28 to a posture, and can relax the user during the massage.

In addition, the embodiment described in the present specification is considered to be illustrative and not restrictive.

For example, the link mechanism 29 of the present embodiment has been described with a mechanism in which the first link member 30 is disposed at a lower portion of the bracket 11 and the second link member 39 is disposed at an upper portion of the first link member 30. It is also possible to form a mechanism in which the first link member 30 and the second link member 39 are disposed opposite to each other in the up and down direction.

That is, as a modification of the link mechanism 29, for example, the link mechanism 29 may be formed to have the first link member 30, the second link member 39, and the swing link member 49, and be used in advance for the link The driving portion 50 of the mechanism 29 is disposed on the upper portion of the bracket 11, wherein one end 31 of the first link member 30 is rotatably coupled to the upper side of the massaging mechanism 17, and the intermediate portion 33 is coupled to the rotating shaft 55 of the driving portion 54; The second link member 39 and the first link member 30 are disposed at different positions in the vertical direction, the intermediate portion 42 is rotatably supported on the bracket 11 at one end, and the one end 40 is rotatably coupled to the massage mechanism 17 One end 50 of the swing link member 49 is rotatably supported at the other end 32 of the first link member 30, and the other end 51 is rotatably supported at the other end 41 of the second link member 39. on.

Further, in the link mechanism 29 of the present embodiment, the rotation shaft 55 of the drive unit 54 may be coupled to the intermediate portion 33 of the first link member 30, and the rotation of the first link member 30 may be described. Alternatively, the rotation shaft 55 of the driving portion 54 may be coupled to the intermediate portion 42 of the second link member 39, and rotated by the rotation of the second link member 39.

In other words, the above-described link mechanism 29 and its modification are examples of a wide variety of parallel link mechanisms, and the mechanism and operation described in the "mode for carrying out the invention" (the forward and backward movement of the massage mechanism 17) can be performed. The mechanism can be any linkage mechanism.

In particular, in the embodiments described in the present specification, matters that have not been clearly described, such as operating conditions, operating steps, various parameters, size, weight, volume, etc. of the components, are employed without departing from the scope generally practiced by those skilled in the art. Values that can be easily conceived by one of ordinary skill in the art.

Further, the configuration and technical idea of the present invention are not limited to the office chair 1, and can be applied to an ordinary chair or a sofa such as a legless seat.

Further, in the present embodiment, the office chair 1 having the armrest portion 5 and the headrest 4 has been described as an example. However, the office chair 1 having only the seat portion 2, the backrest portion 3, and the base 6 may be used.

1‧‧‧ Chair (office chair)

2‧‧‧s

3‧‧‧Backrest

4‧‧‧ head pillow

5‧‧‧Handrail

6‧‧‧Base

7‧‧‧Support members

8‧‧‧ feet

9‧‧‧ Wheels (rollers)

10‧‧‧cutting section

17‧‧‧ Massage mechanism (backhoe device)

28‧‧‧Mobile agencies

Claims (8)

A chair having: a seat portion; a backrest portion disposed at a rear portion of the seat portion and configured to support a back of the user; and a backrest portion and a massage action applied to a back of a user seated on the seat portion The massage mechanism is characterized in that a bracket is provided inside the backrest portion, and the massage mechanism is disposed on the bracket via a moving mechanism, and the moving mechanism is configured to move the massage mechanism from a position built in the backrest portion to the a position at the front of the backrest portion and capable of massaging the back of the user, the first link member being formed into an L-shaped member in a side view, the length of one end of the L-shape being longer than the other end, and the one end The lower side of the massaging mechanism is rotatably coupled, and the curved portion of the L-shaped intermediate portion is fixed to a rotating shaft disposed on the driving portion and pivoted. The chair according to claim 1, wherein the moving mechanism is configured to move the massaging mechanism from a storage position accommodated inside the backrest portion to a surface position which is a position aligned with a surface layer of the backrest portion. The chair according to the second aspect of the invention, wherein the moving mechanism comprises a link mechanism and a driving unit, wherein the link mechanism is configured to move the massage mechanism, and the driving unit is disposed on the bracket and the connection is The lever mechanism swings, and the above-mentioned link mechanism has: The first link member is rotatably coupled to the massaging mechanism at one end, the intermediate portion is coupled to the rotating shaft of the driving portion, and the second link member is disposed in the vertical direction with the first link member. a different position, the intermediate portion is rotatably supported by the bracket, and one end is rotatably coupled to the massaging mechanism; and the swing link member is rotatably supported at one end in the first link member One end, and the other end is rotatably supported on the other end of the second link member. The chair according to claim 1, wherein the second link member is formed as an L-shaped member in a side view, and one end of the L-shape is longer than the other end, and the one end is rotated. The upper side of the massaging mechanism is coupled to the upper side, and the curved portion of the L-shaped intermediate portion is rotatably supported on the bracket. The chair according to the fourth aspect of the invention, wherein the first link member and the second link member are swingable from a position toward an upper rearward position of the bracket to a position facing the front of the bracket. The chair according to claim 4, wherein in the first link member, a pivot point fixed to the rotation shaft and supported by the shaft is disposed at a pivot point and a shaft support pivotally supported on a lower side of the massage mechanism Between the pivot points of the swing link member, in the second link member, a pivot point pivotally supported on the bracket is disposed on a pivot point pivotally supported on the upper side of the massaging mechanism Between the shaft and the pivot point of the swing link member. The chair according to claim 3, wherein the swing link member is an elongated plate material, and a length of the plate material in a longitudinal direction is substantially the same as a height of the massage mechanism in a vertical direction, and the swing link member is The vertical direction of the massage mechanism is parallel. The chair according to claim 3, wherein, in the link mechanism, one end of the swing link member is closer to the inner side in the left-right direction than the other end, and one end of the second link member is closer to the other end The inside of the left and right direction.